Index: SRUAggregator/trunk/pom.xml
===================================================================
--- SRUAggregator/trunk/pom.xml	(revision 7222)
+++ SRUAggregator/trunk/pom.xml	(revision 7223)
@@ -8,5 +8,5 @@
 	<groupId>eu.clarin.sru.fcs</groupId>
 	<artifactId>aggregator</artifactId>
-	<version>2.9.91-alpha-57</version>
+	<version>3.0.0-64</version>
 	<name>FCS Aggregator</name>
 
Index: SRUAggregator/trunk/src/main/resources/assets/js/main.js
===================================================================
--- SRUAggregator/trunk/src/main/resources/assets/js/main.js	(revision 7222)
+++ SRUAggregator/trunk/src/main/resources/assets/js/main.js	(revision 7223)
@@ -50,4 +50,10675 @@
 
 },{}],2:[function(require,module,exports){
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// This is CodeMirror (http://codemirror.net), a code editor
+// implemented in JavaScript on top of the browser's DOM.
+//
+// You can find some technical background for some of the code below
+// at http://marijnhaverbeke.nl/blog/#cm-internals .
+
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+	typeof define === 'function' && define.amd ? define(factory) :
+	(global.CodeMirror = factory());
+}(this, (function () { 'use strict';
+
+// Kludges for bugs and behavior differences that can't be feature
+// detected are enabled based on userAgent etc sniffing.
+var userAgent = navigator.userAgent;
+var platform = navigator.platform;
+
+var gecko = /gecko\/\d/i.test(userAgent);
+var ie_upto10 = /MSIE \d/.test(userAgent);
+var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
+var edge = /Edge\/(\d+)/.exec(userAgent);
+var ie = ie_upto10 || ie_11up || edge;
+var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1]);
+var webkit = !edge && /WebKit\//.test(userAgent);
+var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
+var chrome = !edge && /Chrome\//.test(userAgent);
+var presto = /Opera\//.test(userAgent);
+var safari = /Apple Computer/.test(navigator.vendor);
+var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
+var phantom = /PhantomJS/.test(userAgent);
+
+var ios = !edge && /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent);
+var android = /Android/.test(userAgent);
+// This is woefully incomplete. Suggestions for alternative methods welcome.
+var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
+var mac = ios || /Mac/.test(platform);
+var chromeOS = /\bCrOS\b/.test(userAgent);
+var windows = /win/i.test(platform);
+
+var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
+if (presto_version) { presto_version = Number(presto_version[1]); }
+if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
+// Some browsers use the wrong event properties to signal cmd/ctrl on OS X
+var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
+var captureRightClick = gecko || (ie && ie_version >= 9);
+
+function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }
+
+var rmClass = function(node, cls) {
+  var current = node.className;
+  var match = classTest(cls).exec(current);
+  if (match) {
+    var after = current.slice(match.index + match[0].length);
+    node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
+  }
+};
+
+function removeChildren(e) {
+  for (var count = e.childNodes.length; count > 0; --count)
+    { e.removeChild(e.firstChild); }
+  return e
+}
+
+function removeChildrenAndAdd(parent, e) {
+  return removeChildren(parent).appendChild(e)
+}
+
+function elt(tag, content, className, style) {
+  var e = document.createElement(tag);
+  if (className) { e.className = className; }
+  if (style) { e.style.cssText = style; }
+  if (typeof content == "string") { e.appendChild(document.createTextNode(content)); }
+  else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]); } }
+  return e
+}
+// wrapper for elt, which removes the elt from the accessibility tree
+function eltP(tag, content, className, style) {
+  var e = elt(tag, content, className, style);
+  e.setAttribute("role", "presentation");
+  return e
+}
+
+var range;
+if (document.createRange) { range = function(node, start, end, endNode) {
+  var r = document.createRange();
+  r.setEnd(endNode || node, end);
+  r.setStart(node, start);
+  return r
+}; }
+else { range = function(node, start, end) {
+  var r = document.body.createTextRange();
+  try { r.moveToElementText(node.parentNode); }
+  catch(e) { return r }
+  r.collapse(true);
+  r.moveEnd("character", end);
+  r.moveStart("character", start);
+  return r
+}; }
+
+function contains(parent, child) {
+  if (child.nodeType == 3) // Android browser always returns false when child is a textnode
+    { child = child.parentNode; }
+  if (parent.contains)
+    { return parent.contains(child) }
+  do {
+    if (child.nodeType == 11) { child = child.host; }
+    if (child == parent) { return true }
+  } while (child = child.parentNode)
+}
+
+function activeElt() {
+  // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
+  // IE < 10 will throw when accessed while the page is loading or in an iframe.
+  // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
+  var activeElement;
+  try {
+    activeElement = document.activeElement;
+  } catch(e) {
+    activeElement = document.body || null;
+  }
+  while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
+    { activeElement = activeElement.shadowRoot.activeElement; }
+  return activeElement
+}
+
+function addClass(node, cls) {
+  var current = node.className;
+  if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls; }
+}
+function joinClasses(a, b) {
+  var as = a.split(" ");
+  for (var i = 0; i < as.length; i++)
+    { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i]; } }
+  return b
+}
+
+var selectInput = function(node) { node.select(); };
+if (ios) // Mobile Safari apparently has a bug where select() is broken.
+  { selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; }; }
+else if (ie) // Suppress mysterious IE10 errors
+  { selectInput = function(node) { try { node.select(); } catch(_e) {} }; }
+
+function bind(f) {
+  var args = Array.prototype.slice.call(arguments, 1);
+  return function(){return f.apply(null, args)}
+}
+
+function copyObj(obj, target, overwrite) {
+  if (!target) { target = {}; }
+  for (var prop in obj)
+    { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
+      { target[prop] = obj[prop]; } }
+  return target
+}
+
+// Counts the column offset in a string, taking tabs into account.
+// Used mostly to find indentation.
+function countColumn(string, end, tabSize, startIndex, startValue) {
+  if (end == null) {
+    end = string.search(/[^\s\u00a0]/);
+    if (end == -1) { end = string.length; }
+  }
+  for (var i = startIndex || 0, n = startValue || 0;;) {
+    var nextTab = string.indexOf("\t", i);
+    if (nextTab < 0 || nextTab >= end)
+      { return n + (end - i) }
+    n += nextTab - i;
+    n += tabSize - (n % tabSize);
+    i = nextTab + 1;
+  }
+}
+
+var Delayed = function() {this.id = null;};
+Delayed.prototype.set = function (ms, f) {
+  clearTimeout(this.id);
+  this.id = setTimeout(f, ms);
+};
+
+function indexOf(array, elt) {
+  for (var i = 0; i < array.length; ++i)
+    { if (array[i] == elt) { return i } }
+  return -1
+}
+
+// Number of pixels added to scroller and sizer to hide scrollbar
+var scrollerGap = 30;
+
+// Returned or thrown by various protocols to signal 'I'm not
+// handling this'.
+var Pass = {toString: function(){return "CodeMirror.Pass"}};
+
+// Reused option objects for setSelection & friends
+var sel_dontScroll = {scroll: false};
+var sel_mouse = {origin: "*mouse"};
+var sel_move = {origin: "+move"};
+
+// The inverse of countColumn -- find the offset that corresponds to
+// a particular column.
+function findColumn(string, goal, tabSize) {
+  for (var pos = 0, col = 0;;) {
+    var nextTab = string.indexOf("\t", pos);
+    if (nextTab == -1) { nextTab = string.length; }
+    var skipped = nextTab - pos;
+    if (nextTab == string.length || col + skipped >= goal)
+      { return pos + Math.min(skipped, goal - col) }
+    col += nextTab - pos;
+    col += tabSize - (col % tabSize);
+    pos = nextTab + 1;
+    if (col >= goal) { return pos }
+  }
+}
+
+var spaceStrs = [""];
+function spaceStr(n) {
+  while (spaceStrs.length <= n)
+    { spaceStrs.push(lst(spaceStrs) + " "); }
+  return spaceStrs[n]
+}
+
+function lst(arr) { return arr[arr.length-1] }
+
+function map(array, f) {
+  var out = [];
+  for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i); }
+  return out
+}
+
+function insertSorted(array, value, score) {
+  var pos = 0, priority = score(value);
+  while (pos < array.length && score(array[pos]) <= priority) { pos++; }
+  array.splice(pos, 0, value);
+}
+
+function nothing() {}
+
+function createObj(base, props) {
+  var inst;
+  if (Object.create) {
+    inst = Object.create(base);
+  } else {
+    nothing.prototype = base;
+    inst = new nothing();
+  }
+  if (props) { copyObj(props, inst); }
+  return inst
+}
+
+var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
+function isWordCharBasic(ch) {
+  return /\w/.test(ch) || ch > "\x80" &&
+    (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
+}
+function isWordChar(ch, helper) {
+  if (!helper) { return isWordCharBasic(ch) }
+  if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
+  return helper.test(ch)
+}
+
+function isEmpty(obj) {
+  for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
+  return true
+}
+
+// Extending unicode characters. A series of a non-extending char +
+// any number of extending chars is treated as a single unit as far
+// as editing and measuring is concerned. This is not fully correct,
+// since some scripts/fonts/browsers also treat other configurations
+// of code points as a group.
+var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
+function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }
+
+// Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
+function skipExtendingChars(str, pos, dir) {
+  while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir; }
+  return pos
+}
+
+// Returns the value from the range [`from`; `to`] that satisfies
+// `pred` and is closest to `from`. Assumes that at least `to`
+// satisfies `pred`. Supports `from` being greater than `to`.
+function findFirst(pred, from, to) {
+  // At any point we are certain `to` satisfies `pred`, don't know
+  // whether `from` does.
+  var dir = from > to ? -1 : 1;
+  for (;;) {
+    if (from == to) { return from }
+    var midF = (from + to) / 2, mid = dir < 0 ? Math.ceil(midF) : Math.floor(midF);
+    if (mid == from) { return pred(mid) ? from : to }
+    if (pred(mid)) { to = mid; }
+    else { from = mid + dir; }
+  }
+}
+
+// The display handles the DOM integration, both for input reading
+// and content drawing. It holds references to DOM nodes and
+// display-related state.
+
+function Display(place, doc, input) {
+  var d = this;
+  this.input = input;
+
+  // Covers bottom-right square when both scrollbars are present.
+  d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
+  d.scrollbarFiller.setAttribute("cm-not-content", "true");
+  // Covers bottom of gutter when coverGutterNextToScrollbar is on
+  // and h scrollbar is present.
+  d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
+  d.gutterFiller.setAttribute("cm-not-content", "true");
+  // Will contain the actual code, positioned to cover the viewport.
+  d.lineDiv = eltP("div", null, "CodeMirror-code");
+  // Elements are added to these to represent selection and cursors.
+  d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
+  d.cursorDiv = elt("div", null, "CodeMirror-cursors");
+  // A visibility: hidden element used to find the size of things.
+  d.measure = elt("div", null, "CodeMirror-measure");
+  // When lines outside of the viewport are measured, they are drawn in this.
+  d.lineMeasure = elt("div", null, "CodeMirror-measure");
+  // Wraps everything that needs to exist inside the vertically-padded coordinate system
+  d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
+                    null, "position: relative; outline: none");
+  var lines = eltP("div", [d.lineSpace], "CodeMirror-lines");
+  // Moved around its parent to cover visible view.
+  d.mover = elt("div", [lines], null, "position: relative");
+  // Set to the height of the document, allowing scrolling.
+  d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
+  d.sizerWidth = null;
+  // Behavior of elts with overflow: auto and padding is
+  // inconsistent across browsers. This is used to ensure the
+  // scrollable area is big enough.
+  d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
+  // Will contain the gutters, if any.
+  d.gutters = elt("div", null, "CodeMirror-gutters");
+  d.lineGutter = null;
+  // Actual scrollable element.
+  d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
+  d.scroller.setAttribute("tabIndex", "-1");
+  // The element in which the editor lives.
+  d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
+
+  // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
+  if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
+  if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true; }
+
+  if (place) {
+    if (place.appendChild) { place.appendChild(d.wrapper); }
+    else { place(d.wrapper); }
+  }
+
+  // Current rendered range (may be bigger than the view window).
+  d.viewFrom = d.viewTo = doc.first;
+  d.reportedViewFrom = d.reportedViewTo = doc.first;
+  // Information about the rendered lines.
+  d.view = [];
+  d.renderedView = null;
+  // Holds info about a single rendered line when it was rendered
+  // for measurement, while not in view.
+  d.externalMeasured = null;
+  // Empty space (in pixels) above the view
+  d.viewOffset = 0;
+  d.lastWrapHeight = d.lastWrapWidth = 0;
+  d.updateLineNumbers = null;
+
+  d.nativeBarWidth = d.barHeight = d.barWidth = 0;
+  d.scrollbarsClipped = false;
+
+  // Used to only resize the line number gutter when necessary (when
+  // the amount of lines crosses a boundary that makes its width change)
+  d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
+  // Set to true when a non-horizontal-scrolling line widget is
+  // added. As an optimization, line widget aligning is skipped when
+  // this is false.
+  d.alignWidgets = false;
+
+  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
+
+  // Tracks the maximum line length so that the horizontal scrollbar
+  // can be kept static when scrolling.
+  d.maxLine = null;
+  d.maxLineLength = 0;
+  d.maxLineChanged = false;
+
+  // Used for measuring wheel scrolling granularity
+  d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
+
+  // True when shift is held down.
+  d.shift = false;
+
+  // Used to track whether anything happened since the context menu
+  // was opened.
+  d.selForContextMenu = null;
+
+  d.activeTouch = null;
+
+  input.init(d);
+}
+
+// Find the line object corresponding to the given line number.
+function getLine(doc, n) {
+  n -= doc.first;
+  if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
+  var chunk = doc;
+  while (!chunk.lines) {
+    for (var i = 0;; ++i) {
+      var child = chunk.children[i], sz = child.chunkSize();
+      if (n < sz) { chunk = child; break }
+      n -= sz;
+    }
+  }
+  return chunk.lines[n]
+}
+
+// Get the part of a document between two positions, as an array of
+// strings.
+function getBetween(doc, start, end) {
+  var out = [], n = start.line;
+  doc.iter(start.line, end.line + 1, function (line) {
+    var text = line.text;
+    if (n == end.line) { text = text.slice(0, end.ch); }
+    if (n == start.line) { text = text.slice(start.ch); }
+    out.push(text);
+    ++n;
+  });
+  return out
+}
+// Get the lines between from and to, as array of strings.
+function getLines(doc, from, to) {
+  var out = [];
+  doc.iter(from, to, function (line) { out.push(line.text); }); // iter aborts when callback returns truthy value
+  return out
+}
+
+// Update the height of a line, propagating the height change
+// upwards to parent nodes.
+function updateLineHeight(line, height) {
+  var diff = height - line.height;
+  if (diff) { for (var n = line; n; n = n.parent) { n.height += diff; } }
+}
+
+// Given a line object, find its line number by walking up through
+// its parent links.
+function lineNo(line) {
+  if (line.parent == null) { return null }
+  var cur = line.parent, no = indexOf(cur.lines, line);
+  for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
+    for (var i = 0;; ++i) {
+      if (chunk.children[i] == cur) { break }
+      no += chunk.children[i].chunkSize();
+    }
+  }
+  return no + cur.first
+}
+
+// Find the line at the given vertical position, using the height
+// information in the document tree.
+function lineAtHeight(chunk, h) {
+  var n = chunk.first;
+  outer: do {
+    for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
+      var child = chunk.children[i$1], ch = child.height;
+      if (h < ch) { chunk = child; continue outer }
+      h -= ch;
+      n += child.chunkSize();
+    }
+    return n
+  } while (!chunk.lines)
+  var i = 0;
+  for (; i < chunk.lines.length; ++i) {
+    var line = chunk.lines[i], lh = line.height;
+    if (h < lh) { break }
+    h -= lh;
+  }
+  return n + i
+}
+
+function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}
+
+function lineNumberFor(options, i) {
+  return String(options.lineNumberFormatter(i + options.firstLineNumber))
+}
+
+// A Pos instance represents a position within the text.
+function Pos(line, ch, sticky) {
+  if ( sticky === void 0 ) sticky = null;
+
+  if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
+  this.line = line;
+  this.ch = ch;
+  this.sticky = sticky;
+}
+
+// Compare two positions, return 0 if they are the same, a negative
+// number when a is less, and a positive number otherwise.
+function cmp(a, b) { return a.line - b.line || a.ch - b.ch }
+
+function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }
+
+function copyPos(x) {return Pos(x.line, x.ch)}
+function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
+function minPos(a, b) { return cmp(a, b) < 0 ? a : b }
+
+// Most of the external API clips given positions to make sure they
+// actually exist within the document.
+function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
+function clipPos(doc, pos) {
+  if (pos.line < doc.first) { return Pos(doc.first, 0) }
+  var last = doc.first + doc.size - 1;
+  if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
+  return clipToLen(pos, getLine(doc, pos.line).text.length)
+}
+function clipToLen(pos, linelen) {
+  var ch = pos.ch;
+  if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
+  else if (ch < 0) { return Pos(pos.line, 0) }
+  else { return pos }
+}
+function clipPosArray(doc, array) {
+  var out = [];
+  for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]); }
+  return out
+}
+
+// Optimize some code when these features are not used.
+var sawReadOnlySpans = false;
+var sawCollapsedSpans = false;
+
+function seeReadOnlySpans() {
+  sawReadOnlySpans = true;
+}
+
+function seeCollapsedSpans() {
+  sawCollapsedSpans = true;
+}
+
+// TEXTMARKER SPANS
+
+function MarkedSpan(marker, from, to) {
+  this.marker = marker;
+  this.from = from; this.to = to;
+}
+
+// Search an array of spans for a span matching the given marker.
+function getMarkedSpanFor(spans, marker) {
+  if (spans) { for (var i = 0; i < spans.length; ++i) {
+    var span = spans[i];
+    if (span.marker == marker) { return span }
+  } }
+}
+// Remove a span from an array, returning undefined if no spans are
+// left (we don't store arrays for lines without spans).
+function removeMarkedSpan(spans, span) {
+  var r;
+  for (var i = 0; i < spans.length; ++i)
+    { if (spans[i] != span) { (r || (r = [])).push(spans[i]); } }
+  return r
+}
+// Add a span to a line.
+function addMarkedSpan(line, span) {
+  line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
+  span.marker.attachLine(line);
+}
+
+// Used for the algorithm that adjusts markers for a change in the
+// document. These functions cut an array of spans at a given
+// character position, returning an array of remaining chunks (or
+// undefined if nothing remains).
+function markedSpansBefore(old, startCh, isInsert) {
+  var nw;
+  if (old) { for (var i = 0; i < old.length; ++i) {
+    var span = old[i], marker = span.marker;
+    var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
+    if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
+      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
+    }
+  } }
+  return nw
+}
+function markedSpansAfter(old, endCh, isInsert) {
+  var nw;
+  if (old) { for (var i = 0; i < old.length; ++i) {
+    var span = old[i], marker = span.marker;
+    var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
+    if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
+      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
+                                            span.to == null ? null : span.to - endCh));
+    }
+  } }
+  return nw
+}
+
+// Given a change object, compute the new set of marker spans that
+// cover the line in which the change took place. Removes spans
+// entirely within the change, reconnects spans belonging to the
+// same marker that appear on both sides of the change, and cuts off
+// spans partially within the change. Returns an array of span
+// arrays with one element for each line in (after) the change.
+function stretchSpansOverChange(doc, change) {
+  if (change.full) { return null }
+  var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
+  var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
+  if (!oldFirst && !oldLast) { return null }
+
+  var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
+  // Get the spans that 'stick out' on both sides
+  var first = markedSpansBefore(oldFirst, startCh, isInsert);
+  var last = markedSpansAfter(oldLast, endCh, isInsert);
+
+  // Next, merge those two ends
+  var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
+  if (first) {
+    // Fix up .to properties of first
+    for (var i = 0; i < first.length; ++i) {
+      var span = first[i];
+      if (span.to == null) {
+        var found = getMarkedSpanFor(last, span.marker);
+        if (!found) { span.to = startCh; }
+        else if (sameLine) { span.to = found.to == null ? null : found.to + offset; }
+      }
+    }
+  }
+  if (last) {
+    // Fix up .from in last (or move them into first in case of sameLine)
+    for (var i$1 = 0; i$1 < last.length; ++i$1) {
+      var span$1 = last[i$1];
+      if (span$1.to != null) { span$1.to += offset; }
+      if (span$1.from == null) {
+        var found$1 = getMarkedSpanFor(first, span$1.marker);
+        if (!found$1) {
+          span$1.from = offset;
+          if (sameLine) { (first || (first = [])).push(span$1); }
+        }
+      } else {
+        span$1.from += offset;
+        if (sameLine) { (first || (first = [])).push(span$1); }
+      }
+    }
+  }
+  // Make sure we didn't create any zero-length spans
+  if (first) { first = clearEmptySpans(first); }
+  if (last && last != first) { last = clearEmptySpans(last); }
+
+  var newMarkers = [first];
+  if (!sameLine) {
+    // Fill gap with whole-line-spans
+    var gap = change.text.length - 2, gapMarkers;
+    if (gap > 0 && first)
+      { for (var i$2 = 0; i$2 < first.length; ++i$2)
+        { if (first[i$2].to == null)
+          { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)); } } }
+    for (var i$3 = 0; i$3 < gap; ++i$3)
+      { newMarkers.push(gapMarkers); }
+    newMarkers.push(last);
+  }
+  return newMarkers
+}
+
+// Remove spans that are empty and don't have a clearWhenEmpty
+// option of false.
+function clearEmptySpans(spans) {
+  for (var i = 0; i < spans.length; ++i) {
+    var span = spans[i];
+    if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
+      { spans.splice(i--, 1); }
+  }
+  if (!spans.length) { return null }
+  return spans
+}
+
+// Used to 'clip' out readOnly ranges when making a change.
+function removeReadOnlyRanges(doc, from, to) {
+  var markers = null;
+  doc.iter(from.line, to.line + 1, function (line) {
+    if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+      var mark = line.markedSpans[i].marker;
+      if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
+        { (markers || (markers = [])).push(mark); }
+    } }
+  });
+  if (!markers) { return null }
+  var parts = [{from: from, to: to}];
+  for (var i = 0; i < markers.length; ++i) {
+    var mk = markers[i], m = mk.find(0);
+    for (var j = 0; j < parts.length; ++j) {
+      var p = parts[j];
+      if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
+      var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
+      if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
+        { newParts.push({from: p.from, to: m.from}); }
+      if (dto > 0 || !mk.inclusiveRight && !dto)
+        { newParts.push({from: m.to, to: p.to}); }
+      parts.splice.apply(parts, newParts);
+      j += newParts.length - 3;
+    }
+  }
+  return parts
+}
+
+// Connect or disconnect spans from a line.
+function detachMarkedSpans(line) {
+  var spans = line.markedSpans;
+  if (!spans) { return }
+  for (var i = 0; i < spans.length; ++i)
+    { spans[i].marker.detachLine(line); }
+  line.markedSpans = null;
+}
+function attachMarkedSpans(line, spans) {
+  if (!spans) { return }
+  for (var i = 0; i < spans.length; ++i)
+    { spans[i].marker.attachLine(line); }
+  line.markedSpans = spans;
+}
+
+// Helpers used when computing which overlapping collapsed span
+// counts as the larger one.
+function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
+function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }
+
+// Returns a number indicating which of two overlapping collapsed
+// spans is larger (and thus includes the other). Falls back to
+// comparing ids when the spans cover exactly the same range.
+function compareCollapsedMarkers(a, b) {
+  var lenDiff = a.lines.length - b.lines.length;
+  if (lenDiff != 0) { return lenDiff }
+  var aPos = a.find(), bPos = b.find();
+  var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
+  if (fromCmp) { return -fromCmp }
+  var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
+  if (toCmp) { return toCmp }
+  return b.id - a.id
+}
+
+// Find out whether a line ends or starts in a collapsed span. If
+// so, return the marker for that span.
+function collapsedSpanAtSide(line, start) {
+  var sps = sawCollapsedSpans && line.markedSpans, found;
+  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+    sp = sps[i];
+    if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
+        (!found || compareCollapsedMarkers(found, sp.marker) < 0))
+      { found = sp.marker; }
+  } }
+  return found
+}
+function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
+function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }
+
+// Test whether there exists a collapsed span that partially
+// overlaps (covers the start or end, but not both) of a new span.
+// Such overlap is not allowed.
+function conflictingCollapsedRange(doc, lineNo$$1, from, to, marker) {
+  var line = getLine(doc, lineNo$$1);
+  var sps = sawCollapsedSpans && line.markedSpans;
+  if (sps) { for (var i = 0; i < sps.length; ++i) {
+    var sp = sps[i];
+    if (!sp.marker.collapsed) { continue }
+    var found = sp.marker.find(0);
+    var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
+    var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
+    if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
+    if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
+        fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
+      { return true }
+  } }
+}
+
+// A visual line is a line as drawn on the screen. Folding, for
+// example, can cause multiple logical lines to appear on the same
+// visual line. This finds the start of the visual line that the
+// given line is part of (usually that is the line itself).
+function visualLine(line) {
+  var merged;
+  while (merged = collapsedSpanAtStart(line))
+    { line = merged.find(-1, true).line; }
+  return line
+}
+
+function visualLineEnd(line) {
+  var merged;
+  while (merged = collapsedSpanAtEnd(line))
+    { line = merged.find(1, true).line; }
+  return line
+}
+
+// Returns an array of logical lines that continue the visual line
+// started by the argument, or undefined if there are no such lines.
+function visualLineContinued(line) {
+  var merged, lines;
+  while (merged = collapsedSpanAtEnd(line)) {
+    line = merged.find(1, true).line
+    ;(lines || (lines = [])).push(line);
+  }
+  return lines
+}
+
+// Get the line number of the start of the visual line that the
+// given line number is part of.
+function visualLineNo(doc, lineN) {
+  var line = getLine(doc, lineN), vis = visualLine(line);
+  if (line == vis) { return lineN }
+  return lineNo(vis)
+}
+
+// Get the line number of the start of the next visual line after
+// the given line.
+function visualLineEndNo(doc, lineN) {
+  if (lineN > doc.lastLine()) { return lineN }
+  var line = getLine(doc, lineN), merged;
+  if (!lineIsHidden(doc, line)) { return lineN }
+  while (merged = collapsedSpanAtEnd(line))
+    { line = merged.find(1, true).line; }
+  return lineNo(line) + 1
+}
+
+// Compute whether a line is hidden. Lines count as hidden when they
+// are part of a visual line that starts with another line, or when
+// they are entirely covered by collapsed, non-widget span.
+function lineIsHidden(doc, line) {
+  var sps = sawCollapsedSpans && line.markedSpans;
+  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+    sp = sps[i];
+    if (!sp.marker.collapsed) { continue }
+    if (sp.from == null) { return true }
+    if (sp.marker.widgetNode) { continue }
+    if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
+      { return true }
+  } }
+}
+function lineIsHiddenInner(doc, line, span) {
+  if (span.to == null) {
+    var end = span.marker.find(1, true);
+    return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
+  }
+  if (span.marker.inclusiveRight && span.to == line.text.length)
+    { return true }
+  for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
+    sp = line.markedSpans[i];
+    if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
+        (sp.to == null || sp.to != span.from) &&
+        (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
+        lineIsHiddenInner(doc, line, sp)) { return true }
+  }
+}
+
+// Find the height above the given line.
+function heightAtLine(lineObj) {
+  lineObj = visualLine(lineObj);
+
+  var h = 0, chunk = lineObj.parent;
+  for (var i = 0; i < chunk.lines.length; ++i) {
+    var line = chunk.lines[i];
+    if (line == lineObj) { break }
+    else { h += line.height; }
+  }
+  for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
+    for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
+      var cur = p.children[i$1];
+      if (cur == chunk) { break }
+      else { h += cur.height; }
+    }
+  }
+  return h
+}
+
+// Compute the character length of a line, taking into account
+// collapsed ranges (see markText) that might hide parts, and join
+// other lines onto it.
+function lineLength(line) {
+  if (line.height == 0) { return 0 }
+  var len = line.text.length, merged, cur = line;
+  while (merged = collapsedSpanAtStart(cur)) {
+    var found = merged.find(0, true);
+    cur = found.from.line;
+    len += found.from.ch - found.to.ch;
+  }
+  cur = line;
+  while (merged = collapsedSpanAtEnd(cur)) {
+    var found$1 = merged.find(0, true);
+    len -= cur.text.length - found$1.from.ch;
+    cur = found$1.to.line;
+    len += cur.text.length - found$1.to.ch;
+  }
+  return len
+}
+
+// Find the longest line in the document.
+function findMaxLine(cm) {
+  var d = cm.display, doc = cm.doc;
+  d.maxLine = getLine(doc, doc.first);
+  d.maxLineLength = lineLength(d.maxLine);
+  d.maxLineChanged = true;
+  doc.iter(function (line) {
+    var len = lineLength(line);
+    if (len > d.maxLineLength) {
+      d.maxLineLength = len;
+      d.maxLine = line;
+    }
+  });
+}
+
+// BIDI HELPERS
+
+function iterateBidiSections(order, from, to, f) {
+  if (!order) { return f(from, to, "ltr", 0) }
+  var found = false;
+  for (var i = 0; i < order.length; ++i) {
+    var part = order[i];
+    if (part.from < to && part.to > from || from == to && part.to == from) {
+      f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr", i);
+      found = true;
+    }
+  }
+  if (!found) { f(from, to, "ltr"); }
+}
+
+var bidiOther = null;
+function getBidiPartAt(order, ch, sticky) {
+  var found;
+  bidiOther = null;
+  for (var i = 0; i < order.length; ++i) {
+    var cur = order[i];
+    if (cur.from < ch && cur.to > ch) { return i }
+    if (cur.to == ch) {
+      if (cur.from != cur.to && sticky == "before") { found = i; }
+      else { bidiOther = i; }
+    }
+    if (cur.from == ch) {
+      if (cur.from != cur.to && sticky != "before") { found = i; }
+      else { bidiOther = i; }
+    }
+  }
+  return found != null ? found : bidiOther
+}
+
+// Bidirectional ordering algorithm
+// See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
+// that this (partially) implements.
+
+// One-char codes used for character types:
+// L (L):   Left-to-Right
+// R (R):   Right-to-Left
+// r (AL):  Right-to-Left Arabic
+// 1 (EN):  European Number
+// + (ES):  European Number Separator
+// % (ET):  European Number Terminator
+// n (AN):  Arabic Number
+// , (CS):  Common Number Separator
+// m (NSM): Non-Spacing Mark
+// b (BN):  Boundary Neutral
+// s (B):   Paragraph Separator
+// t (S):   Segment Separator
+// w (WS):  Whitespace
+// N (ON):  Other Neutrals
+
+// Returns null if characters are ordered as they appear
+// (left-to-right), or an array of sections ({from, to, level}
+// objects) in the order in which they occur visually.
+var bidiOrdering = (function() {
+  // Character types for codepoints 0 to 0xff
+  var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
+  // Character types for codepoints 0x600 to 0x6f9
+  var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111";
+  function charType(code) {
+    if (code <= 0xf7) { return lowTypes.charAt(code) }
+    else if (0x590 <= code && code <= 0x5f4) { return "R" }
+    else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
+    else if (0x6ee <= code && code <= 0x8ac) { return "r" }
+    else if (0x2000 <= code && code <= 0x200b) { return "w" }
+    else if (code == 0x200c) { return "b" }
+    else { return "L" }
+  }
+
+  var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
+  var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
+
+  function BidiSpan(level, from, to) {
+    this.level = level;
+    this.from = from; this.to = to;
+  }
+
+  return function(str, direction) {
+    var outerType = direction == "ltr" ? "L" : "R";
+
+    if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
+    var len = str.length, types = [];
+    for (var i = 0; i < len; ++i)
+      { types.push(charType(str.charCodeAt(i))); }
+
+    // W1. Examine each non-spacing mark (NSM) in the level run, and
+    // change the type of the NSM to the type of the previous
+    // character. If the NSM is at the start of the level run, it will
+    // get the type of sor.
+    for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
+      var type = types[i$1];
+      if (type == "m") { types[i$1] = prev; }
+      else { prev = type; }
+    }
+
+    // W2. Search backwards from each instance of a European number
+    // until the first strong type (R, L, AL, or sor) is found. If an
+    // AL is found, change the type of the European number to Arabic
+    // number.
+    // W3. Change all ALs to R.
+    for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
+      var type$1 = types[i$2];
+      if (type$1 == "1" && cur == "r") { types[i$2] = "n"; }
+      else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R"; } }
+    }
+
+    // W4. A single European separator between two European numbers
+    // changes to a European number. A single common separator between
+    // two numbers of the same type changes to that type.
+    for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
+      var type$2 = types[i$3];
+      if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1"; }
+      else if (type$2 == "," && prev$1 == types[i$3+1] &&
+               (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1; }
+      prev$1 = type$2;
+    }
+
+    // W5. A sequence of European terminators adjacent to European
+    // numbers changes to all European numbers.
+    // W6. Otherwise, separators and terminators change to Other
+    // Neutral.
+    for (var i$4 = 0; i$4 < len; ++i$4) {
+      var type$3 = types[i$4];
+      if (type$3 == ",") { types[i$4] = "N"; }
+      else if (type$3 == "%") {
+        var end = (void 0);
+        for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
+        var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
+        for (var j = i$4; j < end; ++j) { types[j] = replace; }
+        i$4 = end - 1;
+      }
+    }
+
+    // W7. Search backwards from each instance of a European number
+    // until the first strong type (R, L, or sor) is found. If an L is
+    // found, then change the type of the European number to L.
+    for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
+      var type$4 = types[i$5];
+      if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L"; }
+      else if (isStrong.test(type$4)) { cur$1 = type$4; }
+    }
+
+    // N1. A sequence of neutrals takes the direction of the
+    // surrounding strong text if the text on both sides has the same
+    // direction. European and Arabic numbers act as if they were R in
+    // terms of their influence on neutrals. Start-of-level-run (sor)
+    // and end-of-level-run (eor) are used at level run boundaries.
+    // N2. Any remaining neutrals take the embedding direction.
+    for (var i$6 = 0; i$6 < len; ++i$6) {
+      if (isNeutral.test(types[i$6])) {
+        var end$1 = (void 0);
+        for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
+        var before = (i$6 ? types[i$6-1] : outerType) == "L";
+        var after = (end$1 < len ? types[end$1] : outerType) == "L";
+        var replace$1 = before == after ? (before ? "L" : "R") : outerType;
+        for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1; }
+        i$6 = end$1 - 1;
+      }
+    }
+
+    // Here we depart from the documented algorithm, in order to avoid
+    // building up an actual levels array. Since there are only three
+    // levels (0, 1, 2) in an implementation that doesn't take
+    // explicit embedding into account, we can build up the order on
+    // the fly, without following the level-based algorithm.
+    var order = [], m;
+    for (var i$7 = 0; i$7 < len;) {
+      if (countsAsLeft.test(types[i$7])) {
+        var start = i$7;
+        for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
+        order.push(new BidiSpan(0, start, i$7));
+      } else {
+        var pos = i$7, at = order.length;
+        for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
+        for (var j$2 = pos; j$2 < i$7;) {
+          if (countsAsNum.test(types[j$2])) {
+            if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)); }
+            var nstart = j$2;
+            for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
+            order.splice(at, 0, new BidiSpan(2, nstart, j$2));
+            pos = j$2;
+          } else { ++j$2; }
+        }
+        if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)); }
+      }
+    }
+    if (direction == "ltr") {
+      if (order[0].level == 1 && (m = str.match(/^\s+/))) {
+        order[0].from = m[0].length;
+        order.unshift(new BidiSpan(0, 0, m[0].length));
+      }
+      if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
+        lst(order).to -= m[0].length;
+        order.push(new BidiSpan(0, len - m[0].length, len));
+      }
+    }
+
+    return direction == "rtl" ? order.reverse() : order
+  }
+})();
+
+// Get the bidi ordering for the given line (and cache it). Returns
+// false for lines that are fully left-to-right, and an array of
+// BidiSpan objects otherwise.
+function getOrder(line, direction) {
+  var order = line.order;
+  if (order == null) { order = line.order = bidiOrdering(line.text, direction); }
+  return order
+}
+
+// EVENT HANDLING
+
+// Lightweight event framework. on/off also work on DOM nodes,
+// registering native DOM handlers.
+
+var noHandlers = [];
+
+var on = function(emitter, type, f) {
+  if (emitter.addEventListener) {
+    emitter.addEventListener(type, f, false);
+  } else if (emitter.attachEvent) {
+    emitter.attachEvent("on" + type, f);
+  } else {
+    var map$$1 = emitter._handlers || (emitter._handlers = {});
+    map$$1[type] = (map$$1[type] || noHandlers).concat(f);
+  }
+};
+
+function getHandlers(emitter, type) {
+  return emitter._handlers && emitter._handlers[type] || noHandlers
+}
+
+function off(emitter, type, f) {
+  if (emitter.removeEventListener) {
+    emitter.removeEventListener(type, f, false);
+  } else if (emitter.detachEvent) {
+    emitter.detachEvent("on" + type, f);
+  } else {
+    var map$$1 = emitter._handlers, arr = map$$1 && map$$1[type];
+    if (arr) {
+      var index = indexOf(arr, f);
+      if (index > -1)
+        { map$$1[type] = arr.slice(0, index).concat(arr.slice(index + 1)); }
+    }
+  }
+}
+
+function signal(emitter, type /*, values...*/) {
+  var handlers = getHandlers(emitter, type);
+  if (!handlers.length) { return }
+  var args = Array.prototype.slice.call(arguments, 2);
+  for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args); }
+}
+
+// The DOM events that CodeMirror handles can be overridden by
+// registering a (non-DOM) handler on the editor for the event name,
+// and preventDefault-ing the event in that handler.
+function signalDOMEvent(cm, e, override) {
+  if (typeof e == "string")
+    { e = {type: e, preventDefault: function() { this.defaultPrevented = true; }}; }
+  signal(cm, override || e.type, cm, e);
+  return e_defaultPrevented(e) || e.codemirrorIgnore
+}
+
+function signalCursorActivity(cm) {
+  var arr = cm._handlers && cm._handlers.cursorActivity;
+  if (!arr) { return }
+  var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
+  for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
+    { set.push(arr[i]); } }
+}
+
+function hasHandler(emitter, type) {
+  return getHandlers(emitter, type).length > 0
+}
+
+// Add on and off methods to a constructor's prototype, to make
+// registering events on such objects more convenient.
+function eventMixin(ctor) {
+  ctor.prototype.on = function(type, f) {on(this, type, f);};
+  ctor.prototype.off = function(type, f) {off(this, type, f);};
+}
+
+// Due to the fact that we still support jurassic IE versions, some
+// compatibility wrappers are needed.
+
+function e_preventDefault(e) {
+  if (e.preventDefault) { e.preventDefault(); }
+  else { e.returnValue = false; }
+}
+function e_stopPropagation(e) {
+  if (e.stopPropagation) { e.stopPropagation(); }
+  else { e.cancelBubble = true; }
+}
+function e_defaultPrevented(e) {
+  return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
+}
+function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}
+
+function e_target(e) {return e.target || e.srcElement}
+function e_button(e) {
+  var b = e.which;
+  if (b == null) {
+    if (e.button & 1) { b = 1; }
+    else if (e.button & 2) { b = 3; }
+    else if (e.button & 4) { b = 2; }
+  }
+  if (mac && e.ctrlKey && b == 1) { b = 3; }
+  return b
+}
+
+// Detect drag-and-drop
+var dragAndDrop = function() {
+  // There is *some* kind of drag-and-drop support in IE6-8, but I
+  // couldn't get it to work yet.
+  if (ie && ie_version < 9) { return false }
+  var div = elt('div');
+  return "draggable" in div || "dragDrop" in div
+}();
+
+var zwspSupported;
+function zeroWidthElement(measure) {
+  if (zwspSupported == null) {
+    var test = elt("span", "\u200b");
+    removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
+    if (measure.firstChild.offsetHeight != 0)
+      { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8); }
+  }
+  var node = zwspSupported ? elt("span", "\u200b") :
+    elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
+  node.setAttribute("cm-text", "");
+  return node
+}
+
+// Feature-detect IE's crummy client rect reporting for bidi text
+var badBidiRects;
+function hasBadBidiRects(measure) {
+  if (badBidiRects != null) { return badBidiRects }
+  var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
+  var r0 = range(txt, 0, 1).getBoundingClientRect();
+  var r1 = range(txt, 1, 2).getBoundingClientRect();
+  removeChildren(measure);
+  if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
+  return badBidiRects = (r1.right - r0.right < 3)
+}
+
+// See if "".split is the broken IE version, if so, provide an
+// alternative way to split lines.
+var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
+  var pos = 0, result = [], l = string.length;
+  while (pos <= l) {
+    var nl = string.indexOf("\n", pos);
+    if (nl == -1) { nl = string.length; }
+    var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
+    var rt = line.indexOf("\r");
+    if (rt != -1) {
+      result.push(line.slice(0, rt));
+      pos += rt + 1;
+    } else {
+      result.push(line);
+      pos = nl + 1;
+    }
+  }
+  return result
+} : function (string) { return string.split(/\r\n?|\n/); };
+
+var hasSelection = window.getSelection ? function (te) {
+  try { return te.selectionStart != te.selectionEnd }
+  catch(e) { return false }
+} : function (te) {
+  var range$$1;
+  try {range$$1 = te.ownerDocument.selection.createRange();}
+  catch(e) {}
+  if (!range$$1 || range$$1.parentElement() != te) { return false }
+  return range$$1.compareEndPoints("StartToEnd", range$$1) != 0
+};
+
+var hasCopyEvent = (function () {
+  var e = elt("div");
+  if ("oncopy" in e) { return true }
+  e.setAttribute("oncopy", "return;");
+  return typeof e.oncopy == "function"
+})();
+
+var badZoomedRects = null;
+function hasBadZoomedRects(measure) {
+  if (badZoomedRects != null) { return badZoomedRects }
+  var node = removeChildrenAndAdd(measure, elt("span", "x"));
+  var normal = node.getBoundingClientRect();
+  var fromRange = range(node, 0, 1).getBoundingClientRect();
+  return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
+}
+
+// Known modes, by name and by MIME
+var modes = {};
+var mimeModes = {};
+
+// Extra arguments are stored as the mode's dependencies, which is
+// used by (legacy) mechanisms like loadmode.js to automatically
+// load a mode. (Preferred mechanism is the require/define calls.)
+function defineMode(name, mode) {
+  if (arguments.length > 2)
+    { mode.dependencies = Array.prototype.slice.call(arguments, 2); }
+  modes[name] = mode;
+}
+
+function defineMIME(mime, spec) {
+  mimeModes[mime] = spec;
+}
+
+// Given a MIME type, a {name, ...options} config object, or a name
+// string, return a mode config object.
+function resolveMode(spec) {
+  if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
+    spec = mimeModes[spec];
+  } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
+    var found = mimeModes[spec.name];
+    if (typeof found == "string") { found = {name: found}; }
+    spec = createObj(found, spec);
+    spec.name = found.name;
+  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
+    return resolveMode("application/xml")
+  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
+    return resolveMode("application/json")
+  }
+  if (typeof spec == "string") { return {name: spec} }
+  else { return spec || {name: "null"} }
+}
+
+// Given a mode spec (anything that resolveMode accepts), find and
+// initialize an actual mode object.
+function getMode(options, spec) {
+  spec = resolveMode(spec);
+  var mfactory = modes[spec.name];
+  if (!mfactory) { return getMode(options, "text/plain") }
+  var modeObj = mfactory(options, spec);
+  if (modeExtensions.hasOwnProperty(spec.name)) {
+    var exts = modeExtensions[spec.name];
+    for (var prop in exts) {
+      if (!exts.hasOwnProperty(prop)) { continue }
+      if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop]; }
+      modeObj[prop] = exts[prop];
+    }
+  }
+  modeObj.name = spec.name;
+  if (spec.helperType) { modeObj.helperType = spec.helperType; }
+  if (spec.modeProps) { for (var prop$1 in spec.modeProps)
+    { modeObj[prop$1] = spec.modeProps[prop$1]; } }
+
+  return modeObj
+}
+
+// This can be used to attach properties to mode objects from
+// outside the actual mode definition.
+var modeExtensions = {};
+function extendMode(mode, properties) {
+  var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
+  copyObj(properties, exts);
+}
+
+function copyState(mode, state) {
+  if (state === true) { return state }
+  if (mode.copyState) { return mode.copyState(state) }
+  var nstate = {};
+  for (var n in state) {
+    var val = state[n];
+    if (val instanceof Array) { val = val.concat([]); }
+    nstate[n] = val;
+  }
+  return nstate
+}
+
+// Given a mode and a state (for that mode), find the inner mode and
+// state at the position that the state refers to.
+function innerMode(mode, state) {
+  var info;
+  while (mode.innerMode) {
+    info = mode.innerMode(state);
+    if (!info || info.mode == mode) { break }
+    state = info.state;
+    mode = info.mode;
+  }
+  return info || {mode: mode, state: state}
+}
+
+function startState(mode, a1, a2) {
+  return mode.startState ? mode.startState(a1, a2) : true
+}
+
+// STRING STREAM
+
+// Fed to the mode parsers, provides helper functions to make
+// parsers more succinct.
+
+var StringStream = function(string, tabSize, lineOracle) {
+  this.pos = this.start = 0;
+  this.string = string;
+  this.tabSize = tabSize || 8;
+  this.lastColumnPos = this.lastColumnValue = 0;
+  this.lineStart = 0;
+  this.lineOracle = lineOracle;
+};
+
+StringStream.prototype.eol = function () {return this.pos >= this.string.length};
+StringStream.prototype.sol = function () {return this.pos == this.lineStart};
+StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
+StringStream.prototype.next = function () {
+  if (this.pos < this.string.length)
+    { return this.string.charAt(this.pos++) }
+};
+StringStream.prototype.eat = function (match) {
+  var ch = this.string.charAt(this.pos);
+  var ok;
+  if (typeof match == "string") { ok = ch == match; }
+  else { ok = ch && (match.test ? match.test(ch) : match(ch)); }
+  if (ok) {++this.pos; return ch}
+};
+StringStream.prototype.eatWhile = function (match) {
+  var start = this.pos;
+  while (this.eat(match)){}
+  return this.pos > start
+};
+StringStream.prototype.eatSpace = function () {
+    var this$1 = this;
+
+  var start = this.pos;
+  while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this$1.pos; }
+  return this.pos > start
+};
+StringStream.prototype.skipToEnd = function () {this.pos = this.string.length;};
+StringStream.prototype.skipTo = function (ch) {
+  var found = this.string.indexOf(ch, this.pos);
+  if (found > -1) {this.pos = found; return true}
+};
+StringStream.prototype.backUp = function (n) {this.pos -= n;};
+StringStream.prototype.column = function () {
+  if (this.lastColumnPos < this.start) {
+    this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
+    this.lastColumnPos = this.start;
+  }
+  return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+};
+StringStream.prototype.indentation = function () {
+  return countColumn(this.string, null, this.tabSize) -
+    (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+};
+StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
+  if (typeof pattern == "string") {
+    var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; };
+    var substr = this.string.substr(this.pos, pattern.length);
+    if (cased(substr) == cased(pattern)) {
+      if (consume !== false) { this.pos += pattern.length; }
+      return true
+    }
+  } else {
+    var match = this.string.slice(this.pos).match(pattern);
+    if (match && match.index > 0) { return null }
+    if (match && consume !== false) { this.pos += match[0].length; }
+    return match
+  }
+};
+StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
+StringStream.prototype.hideFirstChars = function (n, inner) {
+  this.lineStart += n;
+  try { return inner() }
+  finally { this.lineStart -= n; }
+};
+StringStream.prototype.lookAhead = function (n) {
+  var oracle = this.lineOracle;
+  return oracle && oracle.lookAhead(n)
+};
+StringStream.prototype.baseToken = function () {
+  var oracle = this.lineOracle;
+  return oracle && oracle.baseToken(this.pos)
+};
+
+var SavedContext = function(state, lookAhead) {
+  this.state = state;
+  this.lookAhead = lookAhead;
+};
+
+var Context = function(doc, state, line, lookAhead) {
+  this.state = state;
+  this.doc = doc;
+  this.line = line;
+  this.maxLookAhead = lookAhead || 0;
+  this.baseTokens = null;
+  this.baseTokenPos = 1;
+};
+
+Context.prototype.lookAhead = function (n) {
+  var line = this.doc.getLine(this.line + n);
+  if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n; }
+  return line
+};
+
+Context.prototype.baseToken = function (n) {
+    var this$1 = this;
+
+  if (!this.baseTokens) { return null }
+  while (this.baseTokens[this.baseTokenPos] <= n)
+    { this$1.baseTokenPos += 2; }
+  var type = this.baseTokens[this.baseTokenPos + 1];
+  return {type: type && type.replace(/( |^)overlay .*/, ""),
+          size: this.baseTokens[this.baseTokenPos] - n}
+};
+
+Context.prototype.nextLine = function () {
+  this.line++;
+  if (this.maxLookAhead > 0) { this.maxLookAhead--; }
+};
+
+Context.fromSaved = function (doc, saved, line) {
+  if (saved instanceof SavedContext)
+    { return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
+  else
+    { return new Context(doc, copyState(doc.mode, saved), line) }
+};
+
+Context.prototype.save = function (copy) {
+  var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state;
+  return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
+};
+
+
+// Compute a style array (an array starting with a mode generation
+// -- for invalidation -- followed by pairs of end positions and
+// style strings), which is used to highlight the tokens on the
+// line.
+function highlightLine(cm, line, context, forceToEnd) {
+  // A styles array always starts with a number identifying the
+  // mode/overlays that it is based on (for easy invalidation).
+  var st = [cm.state.modeGen], lineClasses = {};
+  // Compute the base array of styles
+  runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
+          lineClasses, forceToEnd);
+  var state = context.state;
+
+  // Run overlays, adjust style array.
+  var loop = function ( o ) {
+    context.baseTokens = st;
+    var overlay = cm.state.overlays[o], i = 1, at = 0;
+    context.state = true;
+    runMode(cm, line.text, overlay.mode, context, function (end, style) {
+      var start = i;
+      // Ensure there's a token end at the current position, and that i points at it
+      while (at < end) {
+        var i_end = st[i];
+        if (i_end > end)
+          { st.splice(i, 1, end, st[i+1], i_end); }
+        i += 2;
+        at = Math.min(end, i_end);
+      }
+      if (!style) { return }
+      if (overlay.opaque) {
+        st.splice(start, i - start, end, "overlay " + style);
+        i = start + 2;
+      } else {
+        for (; start < i; start += 2) {
+          var cur = st[start+1];
+          st[start+1] = (cur ? cur + " " : "") + "overlay " + style;
+        }
+      }
+    }, lineClasses);
+    context.state = state;
+    context.baseTokens = null;
+    context.baseTokenPos = 1;
+  };
+
+  for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );
+
+  return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
+}
+
+function getLineStyles(cm, line, updateFrontier) {
+  if (!line.styles || line.styles[0] != cm.state.modeGen) {
+    var context = getContextBefore(cm, lineNo(line));
+    var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state);
+    var result = highlightLine(cm, line, context);
+    if (resetState) { context.state = resetState; }
+    line.stateAfter = context.save(!resetState);
+    line.styles = result.styles;
+    if (result.classes) { line.styleClasses = result.classes; }
+    else if (line.styleClasses) { line.styleClasses = null; }
+    if (updateFrontier === cm.doc.highlightFrontier)
+      { cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier); }
+  }
+  return line.styles
+}
+
+function getContextBefore(cm, n, precise) {
+  var doc = cm.doc, display = cm.display;
+  if (!doc.mode.startState) { return new Context(doc, true, n) }
+  var start = findStartLine(cm, n, precise);
+  var saved = start > doc.first && getLine(doc, start - 1).stateAfter;
+  var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start);
+
+  doc.iter(start, n, function (line) {
+    processLine(cm, line.text, context);
+    var pos = context.line;
+    line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null;
+    context.nextLine();
+  });
+  if (precise) { doc.modeFrontier = context.line; }
+  return context
+}
+
+// Lightweight form of highlight -- proceed over this line and
+// update state, but don't save a style array. Used for lines that
+// aren't currently visible.
+function processLine(cm, text, context, startAt) {
+  var mode = cm.doc.mode;
+  var stream = new StringStream(text, cm.options.tabSize, context);
+  stream.start = stream.pos = startAt || 0;
+  if (text == "") { callBlankLine(mode, context.state); }
+  while (!stream.eol()) {
+    readToken(mode, stream, context.state);
+    stream.start = stream.pos;
+  }
+}
+
+function callBlankLine(mode, state) {
+  if (mode.blankLine) { return mode.blankLine(state) }
+  if (!mode.innerMode) { return }
+  var inner = innerMode(mode, state);
+  if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
+}
+
+function readToken(mode, stream, state, inner) {
+  for (var i = 0; i < 10; i++) {
+    if (inner) { inner[0] = innerMode(mode, state).mode; }
+    var style = mode.token(stream, state);
+    if (stream.pos > stream.start) { return style }
+  }
+  throw new Error("Mode " + mode.name + " failed to advance stream.")
+}
+
+var Token = function(stream, type, state) {
+  this.start = stream.start; this.end = stream.pos;
+  this.string = stream.current();
+  this.type = type || null;
+  this.state = state;
+};
+
+// Utility for getTokenAt and getLineTokens
+function takeToken(cm, pos, precise, asArray) {
+  var doc = cm.doc, mode = doc.mode, style;
+  pos = clipPos(doc, pos);
+  var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise);
+  var stream = new StringStream(line.text, cm.options.tabSize, context), tokens;
+  if (asArray) { tokens = []; }
+  while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
+    stream.start = stream.pos;
+    style = readToken(mode, stream, context.state);
+    if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))); }
+  }
+  return asArray ? tokens : new Token(stream, style, context.state)
+}
+
+function extractLineClasses(type, output) {
+  if (type) { for (;;) {
+    var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
+    if (!lineClass) { break }
+    type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
+    var prop = lineClass[1] ? "bgClass" : "textClass";
+    if (output[prop] == null)
+      { output[prop] = lineClass[2]; }
+    else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
+      { output[prop] += " " + lineClass[2]; }
+  } }
+  return type
+}
+
+// Run the given mode's parser over a line, calling f for each token.
+function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
+  var flattenSpans = mode.flattenSpans;
+  if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans; }
+  var curStart = 0, curStyle = null;
+  var stream = new StringStream(text, cm.options.tabSize, context), style;
+  var inner = cm.options.addModeClass && [null];
+  if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses); }
+  while (!stream.eol()) {
+    if (stream.pos > cm.options.maxHighlightLength) {
+      flattenSpans = false;
+      if (forceToEnd) { processLine(cm, text, context, stream.pos); }
+      stream.pos = text.length;
+      style = null;
+    } else {
+      style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses);
+    }
+    if (inner) {
+      var mName = inner[0].name;
+      if (mName) { style = "m-" + (style ? mName + " " + style : mName); }
+    }
+    if (!flattenSpans || curStyle != style) {
+      while (curStart < stream.start) {
+        curStart = Math.min(stream.start, curStart + 5000);
+        f(curStart, curStyle);
+      }
+      curStyle = style;
+    }
+    stream.start = stream.pos;
+  }
+  while (curStart < stream.pos) {
+    // Webkit seems to refuse to render text nodes longer than 57444
+    // characters, and returns inaccurate measurements in nodes
+    // starting around 5000 chars.
+    var pos = Math.min(stream.pos, curStart + 5000);
+    f(pos, curStyle);
+    curStart = pos;
+  }
+}
+
+// Finds the line to start with when starting a parse. Tries to
+// find a line with a stateAfter, so that it can start with a
+// valid state. If that fails, it returns the line with the
+// smallest indentation, which tends to need the least context to
+// parse correctly.
+function findStartLine(cm, n, precise) {
+  var minindent, minline, doc = cm.doc;
+  var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
+  for (var search = n; search > lim; --search) {
+    if (search <= doc.first) { return doc.first }
+    var line = getLine(doc, search - 1), after = line.stateAfter;
+    if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
+      { return search }
+    var indented = countColumn(line.text, null, cm.options.tabSize);
+    if (minline == null || minindent > indented) {
+      minline = search - 1;
+      minindent = indented;
+    }
+  }
+  return minline
+}
+
+function retreatFrontier(doc, n) {
+  doc.modeFrontier = Math.min(doc.modeFrontier, n);
+  if (doc.highlightFrontier < n - 10) { return }
+  var start = doc.first;
+  for (var line = n - 1; line > start; line--) {
+    var saved = getLine(doc, line).stateAfter;
+    // change is on 3
+    // state on line 1 looked ahead 2 -- so saw 3
+    // test 1 + 2 < 3 should cover this
+    if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
+      start = line + 1;
+      break
+    }
+  }
+  doc.highlightFrontier = Math.min(doc.highlightFrontier, start);
+}
+
+// LINE DATA STRUCTURE
+
+// Line objects. These hold state related to a line, including
+// highlighting info (the styles array).
+var Line = function(text, markedSpans, estimateHeight) {
+  this.text = text;
+  attachMarkedSpans(this, markedSpans);
+  this.height = estimateHeight ? estimateHeight(this) : 1;
+};
+
+Line.prototype.lineNo = function () { return lineNo(this) };
+eventMixin(Line);
+
+// Change the content (text, markers) of a line. Automatically
+// invalidates cached information and tries to re-estimate the
+// line's height.
+function updateLine(line, text, markedSpans, estimateHeight) {
+  line.text = text;
+  if (line.stateAfter) { line.stateAfter = null; }
+  if (line.styles) { line.styles = null; }
+  if (line.order != null) { line.order = null; }
+  detachMarkedSpans(line);
+  attachMarkedSpans(line, markedSpans);
+  var estHeight = estimateHeight ? estimateHeight(line) : 1;
+  if (estHeight != line.height) { updateLineHeight(line, estHeight); }
+}
+
+// Detach a line from the document tree and its markers.
+function cleanUpLine(line) {
+  line.parent = null;
+  detachMarkedSpans(line);
+}
+
+// Convert a style as returned by a mode (either null, or a string
+// containing one or more styles) to a CSS style. This is cached,
+// and also looks for line-wide styles.
+var styleToClassCache = {};
+var styleToClassCacheWithMode = {};
+function interpretTokenStyle(style, options) {
+  if (!style || /^\s*$/.test(style)) { return null }
+  var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
+  return cache[style] ||
+    (cache[style] = style.replace(/\S+/g, "cm-$&"))
+}
+
+// Render the DOM representation of the text of a line. Also builds
+// up a 'line map', which points at the DOM nodes that represent
+// specific stretches of text, and is used by the measuring code.
+// The returned object contains the DOM node, this map, and
+// information about line-wide styles that were set by the mode.
+function buildLineContent(cm, lineView) {
+  // The padding-right forces the element to have a 'border', which
+  // is needed on Webkit to be able to get line-level bounding
+  // rectangles for it (in measureChar).
+  var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null);
+  var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
+                 col: 0, pos: 0, cm: cm,
+                 trailingSpace: false,
+                 splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")};
+  lineView.measure = {};
+
+  // Iterate over the logical lines that make up this visual line.
+  for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
+    var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0);
+    builder.pos = 0;
+    builder.addToken = buildToken;
+    // Optionally wire in some hacks into the token-rendering
+    // algorithm, to deal with browser quirks.
+    if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
+      { builder.addToken = buildTokenBadBidi(builder.addToken, order); }
+    builder.map = [];
+    var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
+    insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
+    if (line.styleClasses) {
+      if (line.styleClasses.bgClass)
+        { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || ""); }
+      if (line.styleClasses.textClass)
+        { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || ""); }
+    }
+
+    // Ensure at least a single node is present, for measuring.
+    if (builder.map.length == 0)
+      { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))); }
+
+    // Store the map and a cache object for the current logical line
+    if (i == 0) {
+      lineView.measure.map = builder.map;
+      lineView.measure.cache = {};
+    } else {
+      (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
+      ;(lineView.measure.caches || (lineView.measure.caches = [])).push({});
+    }
+  }
+
+  // See issue #2901
+  if (webkit) {
+    var last = builder.content.lastChild;
+    if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
+      { builder.content.className = "cm-tab-wrap-hack"; }
+  }
+
+  signal(cm, "renderLine", cm, lineView.line, builder.pre);
+  if (builder.pre.className)
+    { builder.textClass = joinClasses(builder.pre.className, builder.textClass || ""); }
+
+  return builder
+}
+
+function defaultSpecialCharPlaceholder(ch) {
+  var token = elt("span", "\u2022", "cm-invalidchar");
+  token.title = "\\u" + ch.charCodeAt(0).toString(16);
+  token.setAttribute("aria-label", token.title);
+  return token
+}
+
+// Build up the DOM representation for a single token, and add it to
+// the line map. Takes care to render special characters separately.
+function buildToken(builder, text, style, startStyle, endStyle, title, css) {
+  if (!text) { return }
+  var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text;
+  var special = builder.cm.state.specialChars, mustWrap = false;
+  var content;
+  if (!special.test(text)) {
+    builder.col += text.length;
+    content = document.createTextNode(displayText);
+    builder.map.push(builder.pos, builder.pos + text.length, content);
+    if (ie && ie_version < 9) { mustWrap = true; }
+    builder.pos += text.length;
+  } else {
+    content = document.createDocumentFragment();
+    var pos = 0;
+    while (true) {
+      special.lastIndex = pos;
+      var m = special.exec(text);
+      var skipped = m ? m.index - pos : text.length - pos;
+      if (skipped) {
+        var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
+        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])); }
+        else { content.appendChild(txt); }
+        builder.map.push(builder.pos, builder.pos + skipped, txt);
+        builder.col += skipped;
+        builder.pos += skipped;
+      }
+      if (!m) { break }
+      pos += skipped + 1;
+      var txt$1 = (void 0);
+      if (m[0] == "\t") {
+        var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
+        txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
+        txt$1.setAttribute("role", "presentation");
+        txt$1.setAttribute("cm-text", "\t");
+        builder.col += tabWidth;
+      } else if (m[0] == "\r" || m[0] == "\n") {
+        txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
+        txt$1.setAttribute("cm-text", m[0]);
+        builder.col += 1;
+      } else {
+        txt$1 = builder.cm.options.specialCharPlaceholder(m[0]);
+        txt$1.setAttribute("cm-text", m[0]);
+        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])); }
+        else { content.appendChild(txt$1); }
+        builder.col += 1;
+      }
+      builder.map.push(builder.pos, builder.pos + 1, txt$1);
+      builder.pos++;
+    }
+  }
+  builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32;
+  if (style || startStyle || endStyle || mustWrap || css) {
+    var fullStyle = style || "";
+    if (startStyle) { fullStyle += startStyle; }
+    if (endStyle) { fullStyle += endStyle; }
+    var token = elt("span", [content], fullStyle, css);
+    if (title) { token.title = title; }
+    return builder.content.appendChild(token)
+  }
+  builder.content.appendChild(content);
+}
+
+function splitSpaces(text, trailingBefore) {
+  if (text.length > 1 && !/  /.test(text)) { return text }
+  var spaceBefore = trailingBefore, result = "";
+  for (var i = 0; i < text.length; i++) {
+    var ch = text.charAt(i);
+    if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
+      { ch = "\u00a0"; }
+    result += ch;
+    spaceBefore = ch == " ";
+  }
+  return result
+}
+
+// Work around nonsense dimensions being reported for stretches of
+// right-to-left text.
+function buildTokenBadBidi(inner, order) {
+  return function (builder, text, style, startStyle, endStyle, title, css) {
+    style = style ? style + " cm-force-border" : "cm-force-border";
+    var start = builder.pos, end = start + text.length;
+    for (;;) {
+      // Find the part that overlaps with the start of this text
+      var part = (void 0);
+      for (var i = 0; i < order.length; i++) {
+        part = order[i];
+        if (part.to > start && part.from <= start) { break }
+      }
+      if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, title, css) }
+      inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css);
+      startStyle = null;
+      text = text.slice(part.to - start);
+      start = part.to;
+    }
+  }
+}
+
+function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
+  var widget = !ignoreWidget && marker.widgetNode;
+  if (widget) { builder.map.push(builder.pos, builder.pos + size, widget); }
+  if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
+    if (!widget)
+      { widget = builder.content.appendChild(document.createElement("span")); }
+    widget.setAttribute("cm-marker", marker.id);
+  }
+  if (widget) {
+    builder.cm.display.input.setUneditable(widget);
+    builder.content.appendChild(widget);
+  }
+  builder.pos += size;
+  builder.trailingSpace = false;
+}
+
+// Outputs a number of spans to make up a line, taking highlighting
+// and marked text into account.
+function insertLineContent(line, builder, styles) {
+  var spans = line.markedSpans, allText = line.text, at = 0;
+  if (!spans) {
+    for (var i$1 = 1; i$1 < styles.length; i$1+=2)
+      { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)); }
+    return
+  }
+
+  var len = allText.length, pos = 0, i = 1, text = "", style, css;
+  var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
+  for (;;) {
+    if (nextChange == pos) { // Update current marker set
+      spanStyle = spanEndStyle = spanStartStyle = title = css = "";
+      collapsed = null; nextChange = Infinity;
+      var foundBookmarks = [], endStyles = (void 0);
+      for (var j = 0; j < spans.length; ++j) {
+        var sp = spans[j], m = sp.marker;
+        if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
+          foundBookmarks.push(m);
+        } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
+          if (sp.to != null && sp.to != pos && nextChange > sp.to) {
+            nextChange = sp.to;
+            spanEndStyle = "";
+          }
+          if (m.className) { spanStyle += " " + m.className; }
+          if (m.css) { css = (css ? css + ";" : "") + m.css; }
+          if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle; }
+          if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to); }
+          if (m.title && !title) { title = m.title; }
+          if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
+            { collapsed = sp; }
+        } else if (sp.from > pos && nextChange > sp.from) {
+          nextChange = sp.from;
+        }
+      }
+      if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
+        { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1]; } } }
+
+      if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
+        { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]); } }
+      if (collapsed && (collapsed.from || 0) == pos) {
+        buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
+                           collapsed.marker, collapsed.from == null);
+        if (collapsed.to == null) { return }
+        if (collapsed.to == pos) { collapsed = false; }
+      }
+    }
+    if (pos >= len) { break }
+
+    var upto = Math.min(len, nextChange);
+    while (true) {
+      if (text) {
+        var end = pos + text.length;
+        if (!collapsed) {
+          var tokenText = end > upto ? text.slice(0, upto - pos) : text;
+          builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
+                           spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css);
+        }
+        if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
+        pos = end;
+        spanStartStyle = "";
+      }
+      text = allText.slice(at, at = styles[i++]);
+      style = interpretTokenStyle(styles[i++], builder.cm.options);
+    }
+  }
+}
+
+
+// These objects are used to represent the visible (currently drawn)
+// part of the document. A LineView may correspond to multiple
+// logical lines, if those are connected by collapsed ranges.
+function LineView(doc, line, lineN) {
+  // The starting line
+  this.line = line;
+  // Continuing lines, if any
+  this.rest = visualLineContinued(line);
+  // Number of logical lines in this visual line
+  this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
+  this.node = this.text = null;
+  this.hidden = lineIsHidden(doc, line);
+}
+
+// Create a range of LineView objects for the given lines.
+function buildViewArray(cm, from, to) {
+  var array = [], nextPos;
+  for (var pos = from; pos < to; pos = nextPos) {
+    var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
+    nextPos = pos + view.size;
+    array.push(view);
+  }
+  return array
+}
+
+var operationGroup = null;
+
+function pushOperation(op) {
+  if (operationGroup) {
+    operationGroup.ops.push(op);
+  } else {
+    op.ownsGroup = operationGroup = {
+      ops: [op],
+      delayedCallbacks: []
+    };
+  }
+}
+
+function fireCallbacksForOps(group) {
+  // Calls delayed callbacks and cursorActivity handlers until no
+  // new ones appear
+  var callbacks = group.delayedCallbacks, i = 0;
+  do {
+    for (; i < callbacks.length; i++)
+      { callbacks[i].call(null); }
+    for (var j = 0; j < group.ops.length; j++) {
+      var op = group.ops[j];
+      if (op.cursorActivityHandlers)
+        { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
+          { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm); } }
+    }
+  } while (i < callbacks.length)
+}
+
+function finishOperation(op, endCb) {
+  var group = op.ownsGroup;
+  if (!group) { return }
+
+  try { fireCallbacksForOps(group); }
+  finally {
+    operationGroup = null;
+    endCb(group);
+  }
+}
+
+var orphanDelayedCallbacks = null;
+
+// Often, we want to signal events at a point where we are in the
+// middle of some work, but don't want the handler to start calling
+// other methods on the editor, which might be in an inconsistent
+// state or simply not expect any other events to happen.
+// signalLater looks whether there are any handlers, and schedules
+// them to be executed when the last operation ends, or, if no
+// operation is active, when a timeout fires.
+function signalLater(emitter, type /*, values...*/) {
+  var arr = getHandlers(emitter, type);
+  if (!arr.length) { return }
+  var args = Array.prototype.slice.call(arguments, 2), list;
+  if (operationGroup) {
+    list = operationGroup.delayedCallbacks;
+  } else if (orphanDelayedCallbacks) {
+    list = orphanDelayedCallbacks;
+  } else {
+    list = orphanDelayedCallbacks = [];
+    setTimeout(fireOrphanDelayed, 0);
+  }
+  var loop = function ( i ) {
+    list.push(function () { return arr[i].apply(null, args); });
+  };
+
+  for (var i = 0; i < arr.length; ++i)
+    loop( i );
+}
+
+function fireOrphanDelayed() {
+  var delayed = orphanDelayedCallbacks;
+  orphanDelayedCallbacks = null;
+  for (var i = 0; i < delayed.length; ++i) { delayed[i](); }
+}
+
+// When an aspect of a line changes, a string is added to
+// lineView.changes. This updates the relevant part of the line's
+// DOM structure.
+function updateLineForChanges(cm, lineView, lineN, dims) {
+  for (var j = 0; j < lineView.changes.length; j++) {
+    var type = lineView.changes[j];
+    if (type == "text") { updateLineText(cm, lineView); }
+    else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims); }
+    else if (type == "class") { updateLineClasses(cm, lineView); }
+    else if (type == "widget") { updateLineWidgets(cm, lineView, dims); }
+  }
+  lineView.changes = null;
+}
+
+// Lines with gutter elements, widgets or a background class need to
+// be wrapped, and have the extra elements added to the wrapper div
+function ensureLineWrapped(lineView) {
+  if (lineView.node == lineView.text) {
+    lineView.node = elt("div", null, null, "position: relative");
+    if (lineView.text.parentNode)
+      { lineView.text.parentNode.replaceChild(lineView.node, lineView.text); }
+    lineView.node.appendChild(lineView.text);
+    if (ie && ie_version < 8) { lineView.node.style.zIndex = 2; }
+  }
+  return lineView.node
+}
+
+function updateLineBackground(cm, lineView) {
+  var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
+  if (cls) { cls += " CodeMirror-linebackground"; }
+  if (lineView.background) {
+    if (cls) { lineView.background.className = cls; }
+    else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
+  } else if (cls) {
+    var wrap = ensureLineWrapped(lineView);
+    lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
+    cm.display.input.setUneditable(lineView.background);
+  }
+}
+
+// Wrapper around buildLineContent which will reuse the structure
+// in display.externalMeasured when possible.
+function getLineContent(cm, lineView) {
+  var ext = cm.display.externalMeasured;
+  if (ext && ext.line == lineView.line) {
+    cm.display.externalMeasured = null;
+    lineView.measure = ext.measure;
+    return ext.built
+  }
+  return buildLineContent(cm, lineView)
+}
+
+// Redraw the line's text. Interacts with the background and text
+// classes because the mode may output tokens that influence these
+// classes.
+function updateLineText(cm, lineView) {
+  var cls = lineView.text.className;
+  var built = getLineContent(cm, lineView);
+  if (lineView.text == lineView.node) { lineView.node = built.pre; }
+  lineView.text.parentNode.replaceChild(built.pre, lineView.text);
+  lineView.text = built.pre;
+  if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
+    lineView.bgClass = built.bgClass;
+    lineView.textClass = built.textClass;
+    updateLineClasses(cm, lineView);
+  } else if (cls) {
+    lineView.text.className = cls;
+  }
+}
+
+function updateLineClasses(cm, lineView) {
+  updateLineBackground(cm, lineView);
+  if (lineView.line.wrapClass)
+    { ensureLineWrapped(lineView).className = lineView.line.wrapClass; }
+  else if (lineView.node != lineView.text)
+    { lineView.node.className = ""; }
+  var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
+  lineView.text.className = textClass || "";
+}
+
+function updateLineGutter(cm, lineView, lineN, dims) {
+  if (lineView.gutter) {
+    lineView.node.removeChild(lineView.gutter);
+    lineView.gutter = null;
+  }
+  if (lineView.gutterBackground) {
+    lineView.node.removeChild(lineView.gutterBackground);
+    lineView.gutterBackground = null;
+  }
+  if (lineView.line.gutterClass) {
+    var wrap = ensureLineWrapped(lineView);
+    lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
+                                    ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"));
+    cm.display.input.setUneditable(lineView.gutterBackground);
+    wrap.insertBefore(lineView.gutterBackground, lineView.text);
+  }
+  var markers = lineView.line.gutterMarkers;
+  if (cm.options.lineNumbers || markers) {
+    var wrap$1 = ensureLineWrapped(lineView);
+    var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"));
+    cm.display.input.setUneditable(gutterWrap);
+    wrap$1.insertBefore(gutterWrap, lineView.text);
+    if (lineView.line.gutterClass)
+      { gutterWrap.className += " " + lineView.line.gutterClass; }
+    if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
+      { lineView.lineNumber = gutterWrap.appendChild(
+        elt("div", lineNumberFor(cm.options, lineN),
+            "CodeMirror-linenumber CodeMirror-gutter-elt",
+            ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))); }
+    if (markers) { for (var k = 0; k < cm.options.gutters.length; ++k) {
+      var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
+      if (found)
+        { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
+                                   ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))); }
+    } }
+  }
+}
+
+function updateLineWidgets(cm, lineView, dims) {
+  if (lineView.alignable) { lineView.alignable = null; }
+  for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
+    next = node.nextSibling;
+    if (node.className == "CodeMirror-linewidget")
+      { lineView.node.removeChild(node); }
+  }
+  insertLineWidgets(cm, lineView, dims);
+}
+
+// Build a line's DOM representation from scratch
+function buildLineElement(cm, lineView, lineN, dims) {
+  var built = getLineContent(cm, lineView);
+  lineView.text = lineView.node = built.pre;
+  if (built.bgClass) { lineView.bgClass = built.bgClass; }
+  if (built.textClass) { lineView.textClass = built.textClass; }
+
+  updateLineClasses(cm, lineView);
+  updateLineGutter(cm, lineView, lineN, dims);
+  insertLineWidgets(cm, lineView, dims);
+  return lineView.node
+}
+
+// A lineView may contain multiple logical lines (when merged by
+// collapsed spans). The widgets for all of them need to be drawn.
+function insertLineWidgets(cm, lineView, dims) {
+  insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
+  if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+    { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false); } }
+}
+
+function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
+  if (!line.widgets) { return }
+  var wrap = ensureLineWrapped(lineView);
+  for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
+    var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
+    if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true"); }
+    positionLineWidget(widget, node, lineView, dims);
+    cm.display.input.setUneditable(node);
+    if (allowAbove && widget.above)
+      { wrap.insertBefore(node, lineView.gutter || lineView.text); }
+    else
+      { wrap.appendChild(node); }
+    signalLater(widget, "redraw");
+  }
+}
+
+function positionLineWidget(widget, node, lineView, dims) {
+  if (widget.noHScroll) {
+    (lineView.alignable || (lineView.alignable = [])).push(node);
+    var width = dims.wrapperWidth;
+    node.style.left = dims.fixedPos + "px";
+    if (!widget.coverGutter) {
+      width -= dims.gutterTotalWidth;
+      node.style.paddingLeft = dims.gutterTotalWidth + "px";
+    }
+    node.style.width = width + "px";
+  }
+  if (widget.coverGutter) {
+    node.style.zIndex = 5;
+    node.style.position = "relative";
+    if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px"; }
+  }
+}
+
+function widgetHeight(widget) {
+  if (widget.height != null) { return widget.height }
+  var cm = widget.doc.cm;
+  if (!cm) { return 0 }
+  if (!contains(document.body, widget.node)) {
+    var parentStyle = "position: relative;";
+    if (widget.coverGutter)
+      { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;"; }
+    if (widget.noHScroll)
+      { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;"; }
+    removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
+  }
+  return widget.height = widget.node.parentNode.offsetHeight
+}
+
+// Return true when the given mouse event happened in a widget
+function eventInWidget(display, e) {
+  for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
+    if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
+        (n.parentNode == display.sizer && n != display.mover))
+      { return true }
+  }
+}
+
+// POSITION MEASUREMENT
+
+function paddingTop(display) {return display.lineSpace.offsetTop}
+function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
+function paddingH(display) {
+  if (display.cachedPaddingH) { return display.cachedPaddingH }
+  var e = removeChildrenAndAdd(display.measure, elt("pre", "x"));
+  var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
+  var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
+  if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data; }
+  return data
+}
+
+function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
+function displayWidth(cm) {
+  return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
+}
+function displayHeight(cm) {
+  return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
+}
+
+// Ensure the lineView.wrapping.heights array is populated. This is
+// an array of bottom offsets for the lines that make up a drawn
+// line. When lineWrapping is on, there might be more than one
+// height.
+function ensureLineHeights(cm, lineView, rect) {
+  var wrapping = cm.options.lineWrapping;
+  var curWidth = wrapping && displayWidth(cm);
+  if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
+    var heights = lineView.measure.heights = [];
+    if (wrapping) {
+      lineView.measure.width = curWidth;
+      var rects = lineView.text.firstChild.getClientRects();
+      for (var i = 0; i < rects.length - 1; i++) {
+        var cur = rects[i], next = rects[i + 1];
+        if (Math.abs(cur.bottom - next.bottom) > 2)
+          { heights.push((cur.bottom + next.top) / 2 - rect.top); }
+      }
+    }
+    heights.push(rect.bottom - rect.top);
+  }
+}
+
+// Find a line map (mapping character offsets to text nodes) and a
+// measurement cache for the given line number. (A line view might
+// contain multiple lines when collapsed ranges are present.)
+function mapFromLineView(lineView, line, lineN) {
+  if (lineView.line == line)
+    { return {map: lineView.measure.map, cache: lineView.measure.cache} }
+  for (var i = 0; i < lineView.rest.length; i++)
+    { if (lineView.rest[i] == line)
+      { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
+  for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
+    { if (lineNo(lineView.rest[i$1]) > lineN)
+      { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
+}
+
+// Render a line into the hidden node display.externalMeasured. Used
+// when measurement is needed for a line that's not in the viewport.
+function updateExternalMeasurement(cm, line) {
+  line = visualLine(line);
+  var lineN = lineNo(line);
+  var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
+  view.lineN = lineN;
+  var built = view.built = buildLineContent(cm, view);
+  view.text = built.pre;
+  removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
+  return view
+}
+
+// Get a {top, bottom, left, right} box (in line-local coordinates)
+// for a given character.
+function measureChar(cm, line, ch, bias) {
+  return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
+}
+
+// Find a line view that corresponds to the given line number.
+function findViewForLine(cm, lineN) {
+  if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
+    { return cm.display.view[findViewIndex(cm, lineN)] }
+  var ext = cm.display.externalMeasured;
+  if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
+    { return ext }
+}
+
+// Measurement can be split in two steps, the set-up work that
+// applies to the whole line, and the measurement of the actual
+// character. Functions like coordsChar, that need to do a lot of
+// measurements in a row, can thus ensure that the set-up work is
+// only done once.
+function prepareMeasureForLine(cm, line) {
+  var lineN = lineNo(line);
+  var view = findViewForLine(cm, lineN);
+  if (view && !view.text) {
+    view = null;
+  } else if (view && view.changes) {
+    updateLineForChanges(cm, view, lineN, getDimensions(cm));
+    cm.curOp.forceUpdate = true;
+  }
+  if (!view)
+    { view = updateExternalMeasurement(cm, line); }
+
+  var info = mapFromLineView(view, line, lineN);
+  return {
+    line: line, view: view, rect: null,
+    map: info.map, cache: info.cache, before: info.before,
+    hasHeights: false
+  }
+}
+
+// Given a prepared measurement object, measures the position of an
+// actual character (or fetches it from the cache).
+function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
+  if (prepared.before) { ch = -1; }
+  var key = ch + (bias || ""), found;
+  if (prepared.cache.hasOwnProperty(key)) {
+    found = prepared.cache[key];
+  } else {
+    if (!prepared.rect)
+      { prepared.rect = prepared.view.text.getBoundingClientRect(); }
+    if (!prepared.hasHeights) {
+      ensureLineHeights(cm, prepared.view, prepared.rect);
+      prepared.hasHeights = true;
+    }
+    found = measureCharInner(cm, prepared, ch, bias);
+    if (!found.bogus) { prepared.cache[key] = found; }
+  }
+  return {left: found.left, right: found.right,
+          top: varHeight ? found.rtop : found.top,
+          bottom: varHeight ? found.rbottom : found.bottom}
+}
+
+var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
+
+function nodeAndOffsetInLineMap(map$$1, ch, bias) {
+  var node, start, end, collapse, mStart, mEnd;
+  // First, search the line map for the text node corresponding to,
+  // or closest to, the target character.
+  for (var i = 0; i < map$$1.length; i += 3) {
+    mStart = map$$1[i];
+    mEnd = map$$1[i + 1];
+    if (ch < mStart) {
+      start = 0; end = 1;
+      collapse = "left";
+    } else if (ch < mEnd) {
+      start = ch - mStart;
+      end = start + 1;
+    } else if (i == map$$1.length - 3 || ch == mEnd && map$$1[i + 3] > ch) {
+      end = mEnd - mStart;
+      start = end - 1;
+      if (ch >= mEnd) { collapse = "right"; }
+    }
+    if (start != null) {
+      node = map$$1[i + 2];
+      if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
+        { collapse = bias; }
+      if (bias == "left" && start == 0)
+        { while (i && map$$1[i - 2] == map$$1[i - 3] && map$$1[i - 1].insertLeft) {
+          node = map$$1[(i -= 3) + 2];
+          collapse = "left";
+        } }
+      if (bias == "right" && start == mEnd - mStart)
+        { while (i < map$$1.length - 3 && map$$1[i + 3] == map$$1[i + 4] && !map$$1[i + 5].insertLeft) {
+          node = map$$1[(i += 3) + 2];
+          collapse = "right";
+        } }
+      break
+    }
+  }
+  return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
+}
+
+function getUsefulRect(rects, bias) {
+  var rect = nullRect;
+  if (bias == "left") { for (var i = 0; i < rects.length; i++) {
+    if ((rect = rects[i]).left != rect.right) { break }
+  } } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
+    if ((rect = rects[i$1]).left != rect.right) { break }
+  } }
+  return rect
+}
+
+function measureCharInner(cm, prepared, ch, bias) {
+  var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
+  var node = place.node, start = place.start, end = place.end, collapse = place.collapse;
+
+  var rect;
+  if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
+    for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
+      while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start; }
+      while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end; }
+      if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
+        { rect = node.parentNode.getBoundingClientRect(); }
+      else
+        { rect = getUsefulRect(range(node, start, end).getClientRects(), bias); }
+      if (rect.left || rect.right || start == 0) { break }
+      end = start;
+      start = start - 1;
+      collapse = "right";
+    }
+    if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect); }
+  } else { // If it is a widget, simply get the box for the whole widget.
+    if (start > 0) { collapse = bias = "right"; }
+    var rects;
+    if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
+      { rect = rects[bias == "right" ? rects.length - 1 : 0]; }
+    else
+      { rect = node.getBoundingClientRect(); }
+  }
+  if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
+    var rSpan = node.parentNode.getClientRects()[0];
+    if (rSpan)
+      { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom}; }
+    else
+      { rect = nullRect; }
+  }
+
+  var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
+  var mid = (rtop + rbot) / 2;
+  var heights = prepared.view.measure.heights;
+  var i = 0;
+  for (; i < heights.length - 1; i++)
+    { if (mid < heights[i]) { break } }
+  var top = i ? heights[i - 1] : 0, bot = heights[i];
+  var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
+                right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
+                top: top, bottom: bot};
+  if (!rect.left && !rect.right) { result.bogus = true; }
+  if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }
+
+  return result
+}
+
+// Work around problem with bounding client rects on ranges being
+// returned incorrectly when zoomed on IE10 and below.
+function maybeUpdateRectForZooming(measure, rect) {
+  if (!window.screen || screen.logicalXDPI == null ||
+      screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
+    { return rect }
+  var scaleX = screen.logicalXDPI / screen.deviceXDPI;
+  var scaleY = screen.logicalYDPI / screen.deviceYDPI;
+  return {left: rect.left * scaleX, right: rect.right * scaleX,
+          top: rect.top * scaleY, bottom: rect.bottom * scaleY}
+}
+
+function clearLineMeasurementCacheFor(lineView) {
+  if (lineView.measure) {
+    lineView.measure.cache = {};
+    lineView.measure.heights = null;
+    if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+      { lineView.measure.caches[i] = {}; } }
+  }
+}
+
+function clearLineMeasurementCache(cm) {
+  cm.display.externalMeasure = null;
+  removeChildren(cm.display.lineMeasure);
+  for (var i = 0; i < cm.display.view.length; i++)
+    { clearLineMeasurementCacheFor(cm.display.view[i]); }
+}
+
+function clearCaches(cm) {
+  clearLineMeasurementCache(cm);
+  cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
+  if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true; }
+  cm.display.lineNumChars = null;
+}
+
+function pageScrollX() {
+  // Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
+  // which causes page_Offset and bounding client rects to use
+  // different reference viewports and invalidate our calculations.
+  if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
+  return window.pageXOffset || (document.documentElement || document.body).scrollLeft
+}
+function pageScrollY() {
+  if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
+  return window.pageYOffset || (document.documentElement || document.body).scrollTop
+}
+
+function widgetTopHeight(lineObj) {
+  var height = 0;
+  if (lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above)
+    { height += widgetHeight(lineObj.widgets[i]); } } }
+  return height
+}
+
+// Converts a {top, bottom, left, right} box from line-local
+// coordinates into another coordinate system. Context may be one of
+// "line", "div" (display.lineDiv), "local"./null (editor), "window",
+// or "page".
+function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
+  if (!includeWidgets) {
+    var height = widgetTopHeight(lineObj);
+    rect.top += height; rect.bottom += height;
+  }
+  if (context == "line") { return rect }
+  if (!context) { context = "local"; }
+  var yOff = heightAtLine(lineObj);
+  if (context == "local") { yOff += paddingTop(cm.display); }
+  else { yOff -= cm.display.viewOffset; }
+  if (context == "page" || context == "window") {
+    var lOff = cm.display.lineSpace.getBoundingClientRect();
+    yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
+    var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
+    rect.left += xOff; rect.right += xOff;
+  }
+  rect.top += yOff; rect.bottom += yOff;
+  return rect
+}
+
+// Coverts a box from "div" coords to another coordinate system.
+// Context may be "window", "page", "div", or "local"./null.
+function fromCoordSystem(cm, coords, context) {
+  if (context == "div") { return coords }
+  var left = coords.left, top = coords.top;
+  // First move into "page" coordinate system
+  if (context == "page") {
+    left -= pageScrollX();
+    top -= pageScrollY();
+  } else if (context == "local" || !context) {
+    var localBox = cm.display.sizer.getBoundingClientRect();
+    left += localBox.left;
+    top += localBox.top;
+  }
+
+  var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
+  return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
+}
+
+function charCoords(cm, pos, context, lineObj, bias) {
+  if (!lineObj) { lineObj = getLine(cm.doc, pos.line); }
+  return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
+}
+
+// Returns a box for a given cursor position, which may have an
+// 'other' property containing the position of the secondary cursor
+// on a bidi boundary.
+// A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
+// and after `char - 1` in writing order of `char - 1`
+// A cursor Pos(line, char, "after") is on the same visual line as `char`
+// and before `char` in writing order of `char`
+// Examples (upper-case letters are RTL, lower-case are LTR):
+//     Pos(0, 1, ...)
+//     before   after
+// ab     a|b     a|b
+// aB     a|B     aB|
+// Ab     |Ab     A|b
+// AB     B|A     B|A
+// Every position after the last character on a line is considered to stick
+// to the last character on the line.
+function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
+  lineObj = lineObj || getLine(cm.doc, pos.line);
+  if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
+  function get(ch, right) {
+    var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
+    if (right) { m.left = m.right; } else { m.right = m.left; }
+    return intoCoordSystem(cm, lineObj, m, context)
+  }
+  var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky;
+  if (ch >= lineObj.text.length) {
+    ch = lineObj.text.length;
+    sticky = "before";
+  } else if (ch <= 0) {
+    ch = 0;
+    sticky = "after";
+  }
+  if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }
+
+  function getBidi(ch, partPos, invert) {
+    var part = order[partPos], right = part.level == 1;
+    return get(invert ? ch - 1 : ch, right != invert)
+  }
+  var partPos = getBidiPartAt(order, ch, sticky);
+  var other = bidiOther;
+  var val = getBidi(ch, partPos, sticky == "before");
+  if (other != null) { val.other = getBidi(ch, other, sticky != "before"); }
+  return val
+}
+
+// Used to cheaply estimate the coordinates for a position. Used for
+// intermediate scroll updates.
+function estimateCoords(cm, pos) {
+  var left = 0;
+  pos = clipPos(cm.doc, pos);
+  if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch; }
+  var lineObj = getLine(cm.doc, pos.line);
+  var top = heightAtLine(lineObj) + paddingTop(cm.display);
+  return {left: left, right: left, top: top, bottom: top + lineObj.height}
+}
+
+// Positions returned by coordsChar contain some extra information.
+// xRel is the relative x position of the input coordinates compared
+// to the found position (so xRel > 0 means the coordinates are to
+// the right of the character position, for example). When outside
+// is true, that means the coordinates lie outside the line's
+// vertical range.
+function PosWithInfo(line, ch, sticky, outside, xRel) {
+  var pos = Pos(line, ch, sticky);
+  pos.xRel = xRel;
+  if (outside) { pos.outside = true; }
+  return pos
+}
+
+// Compute the character position closest to the given coordinates.
+// Input must be lineSpace-local ("div" coordinate system).
+function coordsChar(cm, x, y) {
+  var doc = cm.doc;
+  y += cm.display.viewOffset;
+  if (y < 0) { return PosWithInfo(doc.first, 0, null, true, -1) }
+  var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
+  if (lineN > last)
+    { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, true, 1) }
+  if (x < 0) { x = 0; }
+
+  var lineObj = getLine(doc, lineN);
+  for (;;) {
+    var found = coordsCharInner(cm, lineObj, lineN, x, y);
+    var merged = collapsedSpanAtEnd(lineObj);
+    var mergedPos = merged && merged.find(0, true);
+    if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
+      { lineN = lineNo(lineObj = mergedPos.to.line); }
+    else
+      { return found }
+  }
+}
+
+function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
+  y -= widgetTopHeight(lineObj);
+  var end = lineObj.text.length;
+  var begin = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y; }, end, 0);
+  end = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch).top > y; }, begin, end);
+  return {begin: begin, end: end}
+}
+
+function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
+  if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
+  var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top;
+  return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
+}
+
+// Returns true if the given side of a box is after the given
+// coordinates, in top-to-bottom, left-to-right order.
+function boxIsAfter(box, x, y, left) {
+  return box.bottom <= y ? false : box.top > y ? true : (left ? box.left : box.right) > x
+}
+
+function coordsCharInner(cm, lineObj, lineNo$$1, x, y) {
+  // Move y into line-local coordinate space
+  y -= heightAtLine(lineObj);
+  var preparedMeasure = prepareMeasureForLine(cm, lineObj);
+  // When directly calling `measureCharPrepared`, we have to adjust
+  // for the widgets at this line.
+  var widgetHeight$$1 = widgetTopHeight(lineObj);
+  var begin = 0, end = lineObj.text.length, ltr = true;
+
+  var order = getOrder(lineObj, cm.doc.direction);
+  // If the line isn't plain left-to-right text, first figure out
+  // which bidi section the coordinates fall into.
+  if (order) {
+    var part = (cm.options.lineWrapping ? coordsBidiPartWrapped : coordsBidiPart)
+                 (cm, lineObj, lineNo$$1, preparedMeasure, order, x, y);
+    ltr = part.level != 1;
+    // The awkward -1 offsets are needed because findFirst (called
+    // on these below) will treat its first bound as inclusive,
+    // second as exclusive, but we want to actually address the
+    // characters in the part's range
+    begin = ltr ? part.from : part.to - 1;
+    end = ltr ? part.to : part.from - 1;
+  }
+
+  // A binary search to find the first character whose bounding box
+  // starts after the coordinates. If we run across any whose box wrap
+  // the coordinates, store that.
+  var chAround = null, boxAround = null;
+  var ch = findFirst(function (ch) {
+    var box = measureCharPrepared(cm, preparedMeasure, ch);
+    box.top += widgetHeight$$1; box.bottom += widgetHeight$$1;
+    if (!boxIsAfter(box, x, y, false)) { return false }
+    if (box.top <= y && box.left <= x) {
+      chAround = ch;
+      boxAround = box;
+    }
+    return true
+  }, begin, end);
+
+  var baseX, sticky, outside = false;
+  // If a box around the coordinates was found, use that
+  if (boxAround) {
+    // Distinguish coordinates nearer to the left or right side of the box
+    var atLeft = x - boxAround.left < boxAround.right - x, atStart = atLeft == ltr;
+    ch = chAround + (atStart ? 0 : 1);
+    sticky = atStart ? "after" : "before";
+    baseX = atLeft ? boxAround.left : boxAround.right;
+  } else {
+    // (Adjust for extended bound, if necessary.)
+    if (!ltr && (ch == end || ch == begin)) { ch++; }
+    // To determine which side to associate with, get the box to the
+    // left of the character and compare it's vertical position to the
+    // coordinates
+    sticky = ch == 0 ? "after" : ch == lineObj.text.length ? "before" :
+      (measureCharPrepared(cm, preparedMeasure, ch - (ltr ? 1 : 0)).bottom + widgetHeight$$1 <= y) == ltr ?
+      "after" : "before";
+    // Now get accurate coordinates for this place, in order to get a
+    // base X position
+    var coords = cursorCoords(cm, Pos(lineNo$$1, ch, sticky), "line", lineObj, preparedMeasure);
+    baseX = coords.left;
+    outside = y < coords.top || y >= coords.bottom;
+  }
+
+  ch = skipExtendingChars(lineObj.text, ch, 1);
+  return PosWithInfo(lineNo$$1, ch, sticky, outside, x - baseX)
+}
+
+function coordsBidiPart(cm, lineObj, lineNo$$1, preparedMeasure, order, x, y) {
+  // Bidi parts are sorted left-to-right, and in a non-line-wrapping
+  // situation, we can take this ordering to correspond to the visual
+  // ordering. This finds the first part whose end is after the given
+  // coordinates.
+  var index = findFirst(function (i) {
+    var part = order[i], ltr = part.level != 1;
+    return boxIsAfter(cursorCoords(cm, Pos(lineNo$$1, ltr ? part.to : part.from, ltr ? "before" : "after"),
+                                   "line", lineObj, preparedMeasure), x, y, true)
+  }, 0, order.length - 1);
+  var part = order[index];
+  // If this isn't the first part, the part's start is also after
+  // the coordinates, and the coordinates aren't on the same line as
+  // that start, move one part back.
+  if (index > 0) {
+    var ltr = part.level != 1;
+    var start = cursorCoords(cm, Pos(lineNo$$1, ltr ? part.from : part.to, ltr ? "after" : "before"),
+                             "line", lineObj, preparedMeasure);
+    if (boxIsAfter(start, x, y, true) && start.top > y)
+      { part = order[index - 1]; }
+  }
+  return part
+}
+
+function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
+  // In a wrapped line, rtl text on wrapping boundaries can do things
+  // that don't correspond to the ordering in our `order` array at
+  // all, so a binary search doesn't work, and we want to return a
+  // part that only spans one line so that the binary search in
+  // coordsCharInner is safe. As such, we first find the extent of the
+  // wrapped line, and then do a flat search in which we discard any
+  // spans that aren't on the line.
+  var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y);
+  var begin = ref.begin;
+  var end = ref.end;
+  if (/\s/.test(lineObj.text.charAt(end - 1))) { end--; }
+  var part = null, closestDist = null;
+  for (var i = 0; i < order.length; i++) {
+    var p = order[i];
+    if (p.from >= end || p.to <= begin) { continue }
+    var ltr = p.level != 1;
+    var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right;
+    // Weigh against spans ending before this, so that they are only
+    // picked if nothing ends after
+    var dist = endX < x ? x - endX + 1e9 : endX - x;
+    if (!part || closestDist > dist) {
+      part = p;
+      closestDist = dist;
+    }
+  }
+  if (!part) { part = order[order.length - 1]; }
+  // Clip the part to the wrapped line.
+  if (part.from < begin) { part = {from: begin, to: part.to, level: part.level}; }
+  if (part.to > end) { part = {from: part.from, to: end, level: part.level}; }
+  return part
+}
+
+var measureText;
+// Compute the default text height.
+function textHeight(display) {
+  if (display.cachedTextHeight != null) { return display.cachedTextHeight }
+  if (measureText == null) {
+    measureText = elt("pre");
+    // Measure a bunch of lines, for browsers that compute
+    // fractional heights.
+    for (var i = 0; i < 49; ++i) {
+      measureText.appendChild(document.createTextNode("x"));
+      measureText.appendChild(elt("br"));
+    }
+    measureText.appendChild(document.createTextNode("x"));
+  }
+  removeChildrenAndAdd(display.measure, measureText);
+  var height = measureText.offsetHeight / 50;
+  if (height > 3) { display.cachedTextHeight = height; }
+  removeChildren(display.measure);
+  return height || 1
+}
+
+// Compute the default character width.
+function charWidth(display) {
+  if (display.cachedCharWidth != null) { return display.cachedCharWidth }
+  var anchor = elt("span", "xxxxxxxxxx");
+  var pre = elt("pre", [anchor]);
+  removeChildrenAndAdd(display.measure, pre);
+  var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
+  if (width > 2) { display.cachedCharWidth = width; }
+  return width || 10
+}
+
+// Do a bulk-read of the DOM positions and sizes needed to draw the
+// view, so that we don't interleave reading and writing to the DOM.
+function getDimensions(cm) {
+  var d = cm.display, left = {}, width = {};
+  var gutterLeft = d.gutters.clientLeft;
+  for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
+    left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft;
+    width[cm.options.gutters[i]] = n.clientWidth;
+  }
+  return {fixedPos: compensateForHScroll(d),
+          gutterTotalWidth: d.gutters.offsetWidth,
+          gutterLeft: left,
+          gutterWidth: width,
+          wrapperWidth: d.wrapper.clientWidth}
+}
+
+// Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
+// but using getBoundingClientRect to get a sub-pixel-accurate
+// result.
+function compensateForHScroll(display) {
+  return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
+}
+
+// Returns a function that estimates the height of a line, to use as
+// first approximation until the line becomes visible (and is thus
+// properly measurable).
+function estimateHeight(cm) {
+  var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
+  var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
+  return function (line) {
+    if (lineIsHidden(cm.doc, line)) { return 0 }
+
+    var widgetsHeight = 0;
+    if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
+      if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height; }
+    } }
+
+    if (wrapping)
+      { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
+    else
+      { return widgetsHeight + th }
+  }
+}
+
+function estimateLineHeights(cm) {
+  var doc = cm.doc, est = estimateHeight(cm);
+  doc.iter(function (line) {
+    var estHeight = est(line);
+    if (estHeight != line.height) { updateLineHeight(line, estHeight); }
+  });
+}
+
+// Given a mouse event, find the corresponding position. If liberal
+// is false, it checks whether a gutter or scrollbar was clicked,
+// and returns null if it was. forRect is used by rectangular
+// selections, and tries to estimate a character position even for
+// coordinates beyond the right of the text.
+function posFromMouse(cm, e, liberal, forRect) {
+  var display = cm.display;
+  if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }
+
+  var x, y, space = display.lineSpace.getBoundingClientRect();
+  // Fails unpredictably on IE[67] when mouse is dragged around quickly.
+  try { x = e.clientX - space.left; y = e.clientY - space.top; }
+  catch (e) { return null }
+  var coords = coordsChar(cm, x, y), line;
+  if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
+    var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
+    coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
+  }
+  return coords
+}
+
+// Find the view element corresponding to a given line. Return null
+// when the line isn't visible.
+function findViewIndex(cm, n) {
+  if (n >= cm.display.viewTo) { return null }
+  n -= cm.display.viewFrom;
+  if (n < 0) { return null }
+  var view = cm.display.view;
+  for (var i = 0; i < view.length; i++) {
+    n -= view[i].size;
+    if (n < 0) { return i }
+  }
+}
+
+function updateSelection(cm) {
+  cm.display.input.showSelection(cm.display.input.prepareSelection());
+}
+
+function prepareSelection(cm, primary) {
+  if ( primary === void 0 ) primary = true;
+
+  var doc = cm.doc, result = {};
+  var curFragment = result.cursors = document.createDocumentFragment();
+  var selFragment = result.selection = document.createDocumentFragment();
+
+  for (var i = 0; i < doc.sel.ranges.length; i++) {
+    if (!primary && i == doc.sel.primIndex) { continue }
+    var range$$1 = doc.sel.ranges[i];
+    if (range$$1.from().line >= cm.display.viewTo || range$$1.to().line < cm.display.viewFrom) { continue }
+    var collapsed = range$$1.empty();
+    if (collapsed || cm.options.showCursorWhenSelecting)
+      { drawSelectionCursor(cm, range$$1.head, curFragment); }
+    if (!collapsed)
+      { drawSelectionRange(cm, range$$1, selFragment); }
+  }
+  return result
+}
+
+// Draws a cursor for the given range
+function drawSelectionCursor(cm, head, output) {
+  var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);
+
+  var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
+  cursor.style.left = pos.left + "px";
+  cursor.style.top = pos.top + "px";
+  cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
+
+  if (pos.other) {
+    // Secondary cursor, shown when on a 'jump' in bi-directional text
+    var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
+    otherCursor.style.display = "";
+    otherCursor.style.left = pos.other.left + "px";
+    otherCursor.style.top = pos.other.top + "px";
+    otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
+  }
+}
+
+function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }
+
+// Draws the given range as a highlighted selection
+function drawSelectionRange(cm, range$$1, output) {
+  var display = cm.display, doc = cm.doc;
+  var fragment = document.createDocumentFragment();
+  var padding = paddingH(cm.display), leftSide = padding.left;
+  var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
+  var docLTR = doc.direction == "ltr";
+
+  function add(left, top, width, bottom) {
+    if (top < 0) { top = 0; }
+    top = Math.round(top);
+    bottom = Math.round(bottom);
+    fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")));
+  }
+
+  function drawForLine(line, fromArg, toArg) {
+    var lineObj = getLine(doc, line);
+    var lineLen = lineObj.text.length;
+    var start, end;
+    function coords(ch, bias) {
+      return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
+    }
+
+    function wrapX(pos, dir, side) {
+      var extent = wrappedLineExtentChar(cm, lineObj, null, pos);
+      var prop = (dir == "ltr") == (side == "after") ? "left" : "right";
+      var ch = side == "after" ? extent.begin : extent.end - (/\s/.test(lineObj.text.charAt(extent.end - 1)) ? 2 : 1);
+      return coords(ch, prop)[prop]
+    }
+
+    var order = getOrder(lineObj, doc.direction);
+    iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir, i) {
+      var ltr = dir == "ltr";
+      var fromPos = coords(from, ltr ? "left" : "right");
+      var toPos = coords(to - 1, ltr ? "right" : "left");
+
+      var openStart = fromArg == null && from == 0, openEnd = toArg == null && to == lineLen;
+      var first = i == 0, last = !order || i == order.length - 1;
+      if (toPos.top - fromPos.top <= 3) { // Single line
+        var openLeft = (docLTR ? openStart : openEnd) && first;
+        var openRight = (docLTR ? openEnd : openStart) && last;
+        var left = openLeft ? leftSide : (ltr ? fromPos : toPos).left;
+        var right = openRight ? rightSide : (ltr ? toPos : fromPos).right;
+        add(left, fromPos.top, right - left, fromPos.bottom);
+      } else { // Multiple lines
+        var topLeft, topRight, botLeft, botRight;
+        if (ltr) {
+          topLeft = docLTR && openStart && first ? leftSide : fromPos.left;
+          topRight = docLTR ? rightSide : wrapX(from, dir, "before");
+          botLeft = docLTR ? leftSide : wrapX(to, dir, "after");
+          botRight = docLTR && openEnd && last ? rightSide : toPos.right;
+        } else {
+          topLeft = !docLTR ? leftSide : wrapX(from, dir, "before");
+          topRight = !docLTR && openStart && first ? rightSide : fromPos.right;
+          botLeft = !docLTR && openEnd && last ? leftSide : toPos.left;
+          botRight = !docLTR ? rightSide : wrapX(to, dir, "after");
+        }
+        add(topLeft, fromPos.top, topRight - topLeft, fromPos.bottom);
+        if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top); }
+        add(botLeft, toPos.top, botRight - botLeft, toPos.bottom);
+      }
+
+      if (!start || cmpCoords(fromPos, start) < 0) { start = fromPos; }
+      if (cmpCoords(toPos, start) < 0) { start = toPos; }
+      if (!end || cmpCoords(fromPos, end) < 0) { end = fromPos; }
+      if (cmpCoords(toPos, end) < 0) { end = toPos; }
+    });
+    return {start: start, end: end}
+  }
+
+  var sFrom = range$$1.from(), sTo = range$$1.to();
+  if (sFrom.line == sTo.line) {
+    drawForLine(sFrom.line, sFrom.ch, sTo.ch);
+  } else {
+    var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
+    var singleVLine = visualLine(fromLine) == visualLine(toLine);
+    var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
+    var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
+    if (singleVLine) {
+      if (leftEnd.top < rightStart.top - 2) {
+        add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
+        add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
+      } else {
+        add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
+      }
+    }
+    if (leftEnd.bottom < rightStart.top)
+      { add(leftSide, leftEnd.bottom, null, rightStart.top); }
+  }
+
+  output.appendChild(fragment);
+}
+
+// Cursor-blinking
+function restartBlink(cm) {
+  if (!cm.state.focused) { return }
+  var display = cm.display;
+  clearInterval(display.blinker);
+  var on = true;
+  display.cursorDiv.style.visibility = "";
+  if (cm.options.cursorBlinkRate > 0)
+    { display.blinker = setInterval(function () { return display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; },
+      cm.options.cursorBlinkRate); }
+  else if (cm.options.cursorBlinkRate < 0)
+    { display.cursorDiv.style.visibility = "hidden"; }
+}
+
+function ensureFocus(cm) {
+  if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); }
+}
+
+function delayBlurEvent(cm) {
+  cm.state.delayingBlurEvent = true;
+  setTimeout(function () { if (cm.state.delayingBlurEvent) {
+    cm.state.delayingBlurEvent = false;
+    onBlur(cm);
+  } }, 100);
+}
+
+function onFocus(cm, e) {
+  if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false; }
+
+  if (cm.options.readOnly == "nocursor") { return }
+  if (!cm.state.focused) {
+    signal(cm, "focus", cm, e);
+    cm.state.focused = true;
+    addClass(cm.display.wrapper, "CodeMirror-focused");
+    // This test prevents this from firing when a context
+    // menu is closed (since the input reset would kill the
+    // select-all detection hack)
+    if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
+      cm.display.input.reset();
+      if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20); } // Issue #1730
+    }
+    cm.display.input.receivedFocus();
+  }
+  restartBlink(cm);
+}
+function onBlur(cm, e) {
+  if (cm.state.delayingBlurEvent) { return }
+
+  if (cm.state.focused) {
+    signal(cm, "blur", cm, e);
+    cm.state.focused = false;
+    rmClass(cm.display.wrapper, "CodeMirror-focused");
+  }
+  clearInterval(cm.display.blinker);
+  setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false; } }, 150);
+}
+
+// Read the actual heights of the rendered lines, and update their
+// stored heights to match.
+function updateHeightsInViewport(cm) {
+  var display = cm.display;
+  var prevBottom = display.lineDiv.offsetTop;
+  for (var i = 0; i < display.view.length; i++) {
+    var cur = display.view[i], height = (void 0);
+    if (cur.hidden) { continue }
+    if (ie && ie_version < 8) {
+      var bot = cur.node.offsetTop + cur.node.offsetHeight;
+      height = bot - prevBottom;
+      prevBottom = bot;
+    } else {
+      var box = cur.node.getBoundingClientRect();
+      height = box.bottom - box.top;
+    }
+    var diff = cur.line.height - height;
+    if (height < 2) { height = textHeight(display); }
+    if (diff > .005 || diff < -.005) {
+      updateLineHeight(cur.line, height);
+      updateWidgetHeight(cur.line);
+      if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
+        { updateWidgetHeight(cur.rest[j]); } }
+    }
+  }
+}
+
+// Read and store the height of line widgets associated with the
+// given line.
+function updateWidgetHeight(line) {
+  if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i)
+    { line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight; } }
+}
+
+// Compute the lines that are visible in a given viewport (defaults
+// the the current scroll position). viewport may contain top,
+// height, and ensure (see op.scrollToPos) properties.
+function visibleLines(display, doc, viewport) {
+  var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
+  top = Math.floor(top - paddingTop(display));
+  var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;
+
+  var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
+  // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
+  // forces those lines into the viewport (if possible).
+  if (viewport && viewport.ensure) {
+    var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
+    if (ensureFrom < from) {
+      from = ensureFrom;
+      to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
+    } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
+      from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
+      to = ensureTo;
+    }
+  }
+  return {from: from, to: Math.max(to, from + 1)}
+}
+
+// Re-align line numbers and gutter marks to compensate for
+// horizontal scrolling.
+function alignHorizontally(cm) {
+  var display = cm.display, view = display.view;
+  if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
+  var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
+  var gutterW = display.gutters.offsetWidth, left = comp + "px";
+  for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
+    if (cm.options.fixedGutter) {
+      if (view[i].gutter)
+        { view[i].gutter.style.left = left; }
+      if (view[i].gutterBackground)
+        { view[i].gutterBackground.style.left = left; }
+    }
+    var align = view[i].alignable;
+    if (align) { for (var j = 0; j < align.length; j++)
+      { align[j].style.left = left; } }
+  } }
+  if (cm.options.fixedGutter)
+    { display.gutters.style.left = (comp + gutterW) + "px"; }
+}
+
+// Used to ensure that the line number gutter is still the right
+// size for the current document size. Returns true when an update
+// is needed.
+function maybeUpdateLineNumberWidth(cm) {
+  if (!cm.options.lineNumbers) { return false }
+  var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
+  if (last.length != display.lineNumChars) {
+    var test = display.measure.appendChild(elt("div", [elt("div", last)],
+                                               "CodeMirror-linenumber CodeMirror-gutter-elt"));
+    var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
+    display.lineGutter.style.width = "";
+    display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
+    display.lineNumWidth = display.lineNumInnerWidth + padding;
+    display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
+    display.lineGutter.style.width = display.lineNumWidth + "px";
+    updateGutterSpace(cm);
+    return true
+  }
+  return false
+}
+
+// SCROLLING THINGS INTO VIEW
+
+// If an editor sits on the top or bottom of the window, partially
+// scrolled out of view, this ensures that the cursor is visible.
+function maybeScrollWindow(cm, rect) {
+  if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }
+
+  var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
+  if (rect.top + box.top < 0) { doScroll = true; }
+  else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false; }
+  if (doScroll != null && !phantom) {
+    var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"));
+    cm.display.lineSpace.appendChild(scrollNode);
+    scrollNode.scrollIntoView(doScroll);
+    cm.display.lineSpace.removeChild(scrollNode);
+  }
+}
+
+// Scroll a given position into view (immediately), verifying that
+// it actually became visible (as line heights are accurately
+// measured, the position of something may 'drift' during drawing).
+function scrollPosIntoView(cm, pos, end, margin) {
+  if (margin == null) { margin = 0; }
+  var rect;
+  if (!cm.options.lineWrapping && pos == end) {
+    // Set pos and end to the cursor positions around the character pos sticks to
+    // If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
+    // If pos == Pos(_, 0, "before"), pos and end are unchanged
+    pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos;
+    end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos;
+  }
+  for (var limit = 0; limit < 5; limit++) {
+    var changed = false;
+    var coords = cursorCoords(cm, pos);
+    var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
+    rect = {left: Math.min(coords.left, endCoords.left),
+            top: Math.min(coords.top, endCoords.top) - margin,
+            right: Math.max(coords.left, endCoords.left),
+            bottom: Math.max(coords.bottom, endCoords.bottom) + margin};
+    var scrollPos = calculateScrollPos(cm, rect);
+    var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
+    if (scrollPos.scrollTop != null) {
+      updateScrollTop(cm, scrollPos.scrollTop);
+      if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true; }
+    }
+    if (scrollPos.scrollLeft != null) {
+      setScrollLeft(cm, scrollPos.scrollLeft);
+      if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true; }
+    }
+    if (!changed) { break }
+  }
+  return rect
+}
+
+// Scroll a given set of coordinates into view (immediately).
+function scrollIntoView(cm, rect) {
+  var scrollPos = calculateScrollPos(cm, rect);
+  if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop); }
+  if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft); }
+}
+
+// Calculate a new scroll position needed to scroll the given
+// rectangle into view. Returns an object with scrollTop and
+// scrollLeft properties. When these are undefined, the
+// vertical/horizontal position does not need to be adjusted.
+function calculateScrollPos(cm, rect) {
+  var display = cm.display, snapMargin = textHeight(cm.display);
+  if (rect.top < 0) { rect.top = 0; }
+  var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
+  var screen = displayHeight(cm), result = {};
+  if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen; }
+  var docBottom = cm.doc.height + paddingVert(display);
+  var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin;
+  if (rect.top < screentop) {
+    result.scrollTop = atTop ? 0 : rect.top;
+  } else if (rect.bottom > screentop + screen) {
+    var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen);
+    if (newTop != screentop) { result.scrollTop = newTop; }
+  }
+
+  var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
+  var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0);
+  var tooWide = rect.right - rect.left > screenw;
+  if (tooWide) { rect.right = rect.left + screenw; }
+  if (rect.left < 10)
+    { result.scrollLeft = 0; }
+  else if (rect.left < screenleft)
+    { result.scrollLeft = Math.max(0, rect.left - (tooWide ? 0 : 10)); }
+  else if (rect.right > screenw + screenleft - 3)
+    { result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw; }
+  return result
+}
+
+// Store a relative adjustment to the scroll position in the current
+// operation (to be applied when the operation finishes).
+function addToScrollTop(cm, top) {
+  if (top == null) { return }
+  resolveScrollToPos(cm);
+  cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
+}
+
+// Make sure that at the end of the operation the current cursor is
+// shown.
+function ensureCursorVisible(cm) {
+  resolveScrollToPos(cm);
+  var cur = cm.getCursor();
+  cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin};
+}
+
+function scrollToCoords(cm, x, y) {
+  if (x != null || y != null) { resolveScrollToPos(cm); }
+  if (x != null) { cm.curOp.scrollLeft = x; }
+  if (y != null) { cm.curOp.scrollTop = y; }
+}
+
+function scrollToRange(cm, range$$1) {
+  resolveScrollToPos(cm);
+  cm.curOp.scrollToPos = range$$1;
+}
+
+// When an operation has its scrollToPos property set, and another
+// scroll action is applied before the end of the operation, this
+// 'simulates' scrolling that position into view in a cheap way, so
+// that the effect of intermediate scroll commands is not ignored.
+function resolveScrollToPos(cm) {
+  var range$$1 = cm.curOp.scrollToPos;
+  if (range$$1) {
+    cm.curOp.scrollToPos = null;
+    var from = estimateCoords(cm, range$$1.from), to = estimateCoords(cm, range$$1.to);
+    scrollToCoordsRange(cm, from, to, range$$1.margin);
+  }
+}
+
+function scrollToCoordsRange(cm, from, to, margin) {
+  var sPos = calculateScrollPos(cm, {
+    left: Math.min(from.left, to.left),
+    top: Math.min(from.top, to.top) - margin,
+    right: Math.max(from.right, to.right),
+    bottom: Math.max(from.bottom, to.bottom) + margin
+  });
+  scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop);
+}
+
+// Sync the scrollable area and scrollbars, ensure the viewport
+// covers the visible area.
+function updateScrollTop(cm, val) {
+  if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
+  if (!gecko) { updateDisplaySimple(cm, {top: val}); }
+  setScrollTop(cm, val, true);
+  if (gecko) { updateDisplaySimple(cm); }
+  startWorker(cm, 100);
+}
+
+function setScrollTop(cm, val, forceScroll) {
+  val = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val);
+  if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
+  cm.doc.scrollTop = val;
+  cm.display.scrollbars.setScrollTop(val);
+  if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val; }
+}
+
+// Sync scroller and scrollbar, ensure the gutter elements are
+// aligned.
+function setScrollLeft(cm, val, isScroller, forceScroll) {
+  val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
+  if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
+  cm.doc.scrollLeft = val;
+  alignHorizontally(cm);
+  if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val; }
+  cm.display.scrollbars.setScrollLeft(val);
+}
+
+// SCROLLBARS
+
+// Prepare DOM reads needed to update the scrollbars. Done in one
+// shot to minimize update/measure roundtrips.
+function measureForScrollbars(cm) {
+  var d = cm.display, gutterW = d.gutters.offsetWidth;
+  var docH = Math.round(cm.doc.height + paddingVert(cm.display));
+  return {
+    clientHeight: d.scroller.clientHeight,
+    viewHeight: d.wrapper.clientHeight,
+    scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
+    viewWidth: d.wrapper.clientWidth,
+    barLeft: cm.options.fixedGutter ? gutterW : 0,
+    docHeight: docH,
+    scrollHeight: docH + scrollGap(cm) + d.barHeight,
+    nativeBarWidth: d.nativeBarWidth,
+    gutterWidth: gutterW
+  }
+}
+
+var NativeScrollbars = function(place, scroll, cm) {
+  this.cm = cm;
+  var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
+  var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
+  place(vert); place(horiz);
+
+  on(vert, "scroll", function () {
+    if (vert.clientHeight) { scroll(vert.scrollTop, "vertical"); }
+  });
+  on(horiz, "scroll", function () {
+    if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal"); }
+  });
+
+  this.checkedZeroWidth = false;
+  // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
+  if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px"; }
+};
+
+NativeScrollbars.prototype.update = function (measure) {
+  var needsH = measure.scrollWidth > measure.clientWidth + 1;
+  var needsV = measure.scrollHeight > measure.clientHeight + 1;
+  var sWidth = measure.nativeBarWidth;
+
+  if (needsV) {
+    this.vert.style.display = "block";
+    this.vert.style.bottom = needsH ? sWidth + "px" : "0";
+    var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
+    // A bug in IE8 can cause this value to be negative, so guard it.
+    this.vert.firstChild.style.height =
+      Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
+  } else {
+    this.vert.style.display = "";
+    this.vert.firstChild.style.height = "0";
+  }
+
+  if (needsH) {
+    this.horiz.style.display = "block";
+    this.horiz.style.right = needsV ? sWidth + "px" : "0";
+    this.horiz.style.left = measure.barLeft + "px";
+    var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
+    this.horiz.firstChild.style.width =
+      Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
+  } else {
+    this.horiz.style.display = "";
+    this.horiz.firstChild.style.width = "0";
+  }
+
+  if (!this.checkedZeroWidth && measure.clientHeight > 0) {
+    if (sWidth == 0) { this.zeroWidthHack(); }
+    this.checkedZeroWidth = true;
+  }
+
+  return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
+};
+
+NativeScrollbars.prototype.setScrollLeft = function (pos) {
+  if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos; }
+  if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz"); }
+};
+
+NativeScrollbars.prototype.setScrollTop = function (pos) {
+  if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos; }
+  if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert"); }
+};
+
+NativeScrollbars.prototype.zeroWidthHack = function () {
+  var w = mac && !mac_geMountainLion ? "12px" : "18px";
+  this.horiz.style.height = this.vert.style.width = w;
+  this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
+  this.disableHoriz = new Delayed;
+  this.disableVert = new Delayed;
+};
+
+NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
+  bar.style.pointerEvents = "auto";
+  function maybeDisable() {
+    // To find out whether the scrollbar is still visible, we
+    // check whether the element under the pixel in the bottom
+    // right corner of the scrollbar box is the scrollbar box
+    // itself (when the bar is still visible) or its filler child
+    // (when the bar is hidden). If it is still visible, we keep
+    // it enabled, if it's hidden, we disable pointer events.
+    var box = bar.getBoundingClientRect();
+    var elt$$1 = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
+        : document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1);
+    if (elt$$1 != bar) { bar.style.pointerEvents = "none"; }
+    else { delay.set(1000, maybeDisable); }
+  }
+  delay.set(1000, maybeDisable);
+};
+
+NativeScrollbars.prototype.clear = function () {
+  var parent = this.horiz.parentNode;
+  parent.removeChild(this.horiz);
+  parent.removeChild(this.vert);
+};
+
+var NullScrollbars = function () {};
+
+NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
+NullScrollbars.prototype.setScrollLeft = function () {};
+NullScrollbars.prototype.setScrollTop = function () {};
+NullScrollbars.prototype.clear = function () {};
+
+function updateScrollbars(cm, measure) {
+  if (!measure) { measure = measureForScrollbars(cm); }
+  var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
+  updateScrollbarsInner(cm, measure);
+  for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
+    if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
+      { updateHeightsInViewport(cm); }
+    updateScrollbarsInner(cm, measureForScrollbars(cm));
+    startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
+  }
+}
+
+// Re-synchronize the fake scrollbars with the actual size of the
+// content.
+function updateScrollbarsInner(cm, measure) {
+  var d = cm.display;
+  var sizes = d.scrollbars.update(measure);
+
+  d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
+  d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
+  d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent";
+
+  if (sizes.right && sizes.bottom) {
+    d.scrollbarFiller.style.display = "block";
+    d.scrollbarFiller.style.height = sizes.bottom + "px";
+    d.scrollbarFiller.style.width = sizes.right + "px";
+  } else { d.scrollbarFiller.style.display = ""; }
+  if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
+    d.gutterFiller.style.display = "block";
+    d.gutterFiller.style.height = sizes.bottom + "px";
+    d.gutterFiller.style.width = measure.gutterWidth + "px";
+  } else { d.gutterFiller.style.display = ""; }
+}
+
+var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};
+
+function initScrollbars(cm) {
+  if (cm.display.scrollbars) {
+    cm.display.scrollbars.clear();
+    if (cm.display.scrollbars.addClass)
+      { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
+  }
+
+  cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
+    cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
+    // Prevent clicks in the scrollbars from killing focus
+    on(node, "mousedown", function () {
+      if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0); }
+    });
+    node.setAttribute("cm-not-content", "true");
+  }, function (pos, axis) {
+    if (axis == "horizontal") { setScrollLeft(cm, pos); }
+    else { updateScrollTop(cm, pos); }
+  }, cm);
+  if (cm.display.scrollbars.addClass)
+    { addClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
+}
+
+// Operations are used to wrap a series of changes to the editor
+// state in such a way that each change won't have to update the
+// cursor and display (which would be awkward, slow, and
+// error-prone). Instead, display updates are batched and then all
+// combined and executed at once.
+
+var nextOpId = 0;
+// Start a new operation.
+function startOperation(cm) {
+  cm.curOp = {
+    cm: cm,
+    viewChanged: false,      // Flag that indicates that lines might need to be redrawn
+    startHeight: cm.doc.height, // Used to detect need to update scrollbar
+    forceUpdate: false,      // Used to force a redraw
+    updateInput: null,       // Whether to reset the input textarea
+    typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
+    changeObjs: null,        // Accumulated changes, for firing change events
+    cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
+    cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
+    selectionChanged: false, // Whether the selection needs to be redrawn
+    updateMaxLine: false,    // Set when the widest line needs to be determined anew
+    scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
+    scrollToPos: null,       // Used to scroll to a specific position
+    focus: false,
+    id: ++nextOpId           // Unique ID
+  };
+  pushOperation(cm.curOp);
+}
+
+// Finish an operation, updating the display and signalling delayed events
+function endOperation(cm) {
+  var op = cm.curOp;
+  finishOperation(op, function (group) {
+    for (var i = 0; i < group.ops.length; i++)
+      { group.ops[i].cm.curOp = null; }
+    endOperations(group);
+  });
+}
+
+// The DOM updates done when an operation finishes are batched so
+// that the minimum number of relayouts are required.
+function endOperations(group) {
+  var ops = group.ops;
+  for (var i = 0; i < ops.length; i++) // Read DOM
+    { endOperation_R1(ops[i]); }
+  for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
+    { endOperation_W1(ops[i$1]); }
+  for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
+    { endOperation_R2(ops[i$2]); }
+  for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
+    { endOperation_W2(ops[i$3]); }
+  for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
+    { endOperation_finish(ops[i$4]); }
+}
+
+function endOperation_R1(op) {
+  var cm = op.cm, display = cm.display;
+  maybeClipScrollbars(cm);
+  if (op.updateMaxLine) { findMaxLine(cm); }
+
+  op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
+    op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
+                       op.scrollToPos.to.line >= display.viewTo) ||
+    display.maxLineChanged && cm.options.lineWrapping;
+  op.update = op.mustUpdate &&
+    new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
+}
+
+function endOperation_W1(op) {
+  op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
+}
+
+function endOperation_R2(op) {
+  var cm = op.cm, display = cm.display;
+  if (op.updatedDisplay) { updateHeightsInViewport(cm); }
+
+  op.barMeasure = measureForScrollbars(cm);
+
+  // If the max line changed since it was last measured, measure it,
+  // and ensure the document's width matches it.
+  // updateDisplay_W2 will use these properties to do the actual resizing
+  if (display.maxLineChanged && !cm.options.lineWrapping) {
+    op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
+    cm.display.sizerWidth = op.adjustWidthTo;
+    op.barMeasure.scrollWidth =
+      Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
+    op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
+  }
+
+  if (op.updatedDisplay || op.selectionChanged)
+    { op.preparedSelection = display.input.prepareSelection(); }
+}
+
+function endOperation_W2(op) {
+  var cm = op.cm;
+
+  if (op.adjustWidthTo != null) {
+    cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
+    if (op.maxScrollLeft < cm.doc.scrollLeft)
+      { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true); }
+    cm.display.maxLineChanged = false;
+  }
+
+  var takeFocus = op.focus && op.focus == activeElt();
+  if (op.preparedSelection)
+    { cm.display.input.showSelection(op.preparedSelection, takeFocus); }
+  if (op.updatedDisplay || op.startHeight != cm.doc.height)
+    { updateScrollbars(cm, op.barMeasure); }
+  if (op.updatedDisplay)
+    { setDocumentHeight(cm, op.barMeasure); }
+
+  if (op.selectionChanged) { restartBlink(cm); }
+
+  if (cm.state.focused && op.updateInput)
+    { cm.display.input.reset(op.typing); }
+  if (takeFocus) { ensureFocus(op.cm); }
+}
+
+function endOperation_finish(op) {
+  var cm = op.cm, display = cm.display, doc = cm.doc;
+
+  if (op.updatedDisplay) { postUpdateDisplay(cm, op.update); }
+
+  // Abort mouse wheel delta measurement, when scrolling explicitly
+  if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
+    { display.wheelStartX = display.wheelStartY = null; }
+
+  // Propagate the scroll position to the actual DOM scroller
+  if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll); }
+
+  if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true); }
+  // If we need to scroll a specific position into view, do so.
+  if (op.scrollToPos) {
+    var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
+                                 clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
+    maybeScrollWindow(cm, rect);
+  }
+
+  // Fire events for markers that are hidden/unidden by editing or
+  // undoing
+  var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
+  if (hidden) { for (var i = 0; i < hidden.length; ++i)
+    { if (!hidden[i].lines.length) { signal(hidden[i], "hide"); } } }
+  if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
+    { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide"); } } }
+
+  if (display.wrapper.offsetHeight)
+    { doc.scrollTop = cm.display.scroller.scrollTop; }
+
+  // Fire change events, and delayed event handlers
+  if (op.changeObjs)
+    { signal(cm, "changes", cm, op.changeObjs); }
+  if (op.update)
+    { op.update.finish(); }
+}
+
+// Run the given function in an operation
+function runInOp(cm, f) {
+  if (cm.curOp) { return f() }
+  startOperation(cm);
+  try { return f() }
+  finally { endOperation(cm); }
+}
+// Wraps a function in an operation. Returns the wrapped function.
+function operation(cm, f) {
+  return function() {
+    if (cm.curOp) { return f.apply(cm, arguments) }
+    startOperation(cm);
+    try { return f.apply(cm, arguments) }
+    finally { endOperation(cm); }
+  }
+}
+// Used to add methods to editor and doc instances, wrapping them in
+// operations.
+function methodOp(f) {
+  return function() {
+    if (this.curOp) { return f.apply(this, arguments) }
+    startOperation(this);
+    try { return f.apply(this, arguments) }
+    finally { endOperation(this); }
+  }
+}
+function docMethodOp(f) {
+  return function() {
+    var cm = this.cm;
+    if (!cm || cm.curOp) { return f.apply(this, arguments) }
+    startOperation(cm);
+    try { return f.apply(this, arguments) }
+    finally { endOperation(cm); }
+  }
+}
+
+// Updates the display.view data structure for a given change to the
+// document. From and to are in pre-change coordinates. Lendiff is
+// the amount of lines added or subtracted by the change. This is
+// used for changes that span multiple lines, or change the way
+// lines are divided into visual lines. regLineChange (below)
+// registers single-line changes.
+function regChange(cm, from, to, lendiff) {
+  if (from == null) { from = cm.doc.first; }
+  if (to == null) { to = cm.doc.first + cm.doc.size; }
+  if (!lendiff) { lendiff = 0; }
+
+  var display = cm.display;
+  if (lendiff && to < display.viewTo &&
+      (display.updateLineNumbers == null || display.updateLineNumbers > from))
+    { display.updateLineNumbers = from; }
+
+  cm.curOp.viewChanged = true;
+
+  if (from >= display.viewTo) { // Change after
+    if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
+      { resetView(cm); }
+  } else if (to <= display.viewFrom) { // Change before
+    if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
+      resetView(cm);
+    } else {
+      display.viewFrom += lendiff;
+      display.viewTo += lendiff;
+    }
+  } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
+    resetView(cm);
+  } else if (from <= display.viewFrom) { // Top overlap
+    var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
+    if (cut) {
+      display.view = display.view.slice(cut.index);
+      display.viewFrom = cut.lineN;
+      display.viewTo += lendiff;
+    } else {
+      resetView(cm);
+    }
+  } else if (to >= display.viewTo) { // Bottom overlap
+    var cut$1 = viewCuttingPoint(cm, from, from, -1);
+    if (cut$1) {
+      display.view = display.view.slice(0, cut$1.index);
+      display.viewTo = cut$1.lineN;
+    } else {
+      resetView(cm);
+    }
+  } else { // Gap in the middle
+    var cutTop = viewCuttingPoint(cm, from, from, -1);
+    var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
+    if (cutTop && cutBot) {
+      display.view = display.view.slice(0, cutTop.index)
+        .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
+        .concat(display.view.slice(cutBot.index));
+      display.viewTo += lendiff;
+    } else {
+      resetView(cm);
+    }
+  }
+
+  var ext = display.externalMeasured;
+  if (ext) {
+    if (to < ext.lineN)
+      { ext.lineN += lendiff; }
+    else if (from < ext.lineN + ext.size)
+      { display.externalMeasured = null; }
+  }
+}
+
+// Register a change to a single line. Type must be one of "text",
+// "gutter", "class", "widget"
+function regLineChange(cm, line, type) {
+  cm.curOp.viewChanged = true;
+  var display = cm.display, ext = cm.display.externalMeasured;
+  if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
+    { display.externalMeasured = null; }
+
+  if (line < display.viewFrom || line >= display.viewTo) { return }
+  var lineView = display.view[findViewIndex(cm, line)];
+  if (lineView.node == null) { return }
+  var arr = lineView.changes || (lineView.changes = []);
+  if (indexOf(arr, type) == -1) { arr.push(type); }
+}
+
+// Clear the view.
+function resetView(cm) {
+  cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
+  cm.display.view = [];
+  cm.display.viewOffset = 0;
+}
+
+function viewCuttingPoint(cm, oldN, newN, dir) {
+  var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
+  if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
+    { return {index: index, lineN: newN} }
+  var n = cm.display.viewFrom;
+  for (var i = 0; i < index; i++)
+    { n += view[i].size; }
+  if (n != oldN) {
+    if (dir > 0) {
+      if (index == view.length - 1) { return null }
+      diff = (n + view[index].size) - oldN;
+      index++;
+    } else {
+      diff = n - oldN;
+    }
+    oldN += diff; newN += diff;
+  }
+  while (visualLineNo(cm.doc, newN) != newN) {
+    if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
+    newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
+    index += dir;
+  }
+  return {index: index, lineN: newN}
+}
+
+// Force the view to cover a given range, adding empty view element
+// or clipping off existing ones as needed.
+function adjustView(cm, from, to) {
+  var display = cm.display, view = display.view;
+  if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
+    display.view = buildViewArray(cm, from, to);
+    display.viewFrom = from;
+  } else {
+    if (display.viewFrom > from)
+      { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view); }
+    else if (display.viewFrom < from)
+      { display.view = display.view.slice(findViewIndex(cm, from)); }
+    display.viewFrom = from;
+    if (display.viewTo < to)
+      { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)); }
+    else if (display.viewTo > to)
+      { display.view = display.view.slice(0, findViewIndex(cm, to)); }
+  }
+  display.viewTo = to;
+}
+
+// Count the number of lines in the view whose DOM representation is
+// out of date (or nonexistent).
+function countDirtyView(cm) {
+  var view = cm.display.view, dirty = 0;
+  for (var i = 0; i < view.length; i++) {
+    var lineView = view[i];
+    if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty; }
+  }
+  return dirty
+}
+
+// HIGHLIGHT WORKER
+
+function startWorker(cm, time) {
+  if (cm.doc.highlightFrontier < cm.display.viewTo)
+    { cm.state.highlight.set(time, bind(highlightWorker, cm)); }
+}
+
+function highlightWorker(cm) {
+  var doc = cm.doc;
+  if (doc.highlightFrontier >= cm.display.viewTo) { return }
+  var end = +new Date + cm.options.workTime;
+  var context = getContextBefore(cm, doc.highlightFrontier);
+  var changedLines = [];
+
+  doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
+    if (context.line >= cm.display.viewFrom) { // Visible
+      var oldStyles = line.styles;
+      var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null;
+      var highlighted = highlightLine(cm, line, context, true);
+      if (resetState) { context.state = resetState; }
+      line.styles = highlighted.styles;
+      var oldCls = line.styleClasses, newCls = highlighted.classes;
+      if (newCls) { line.styleClasses = newCls; }
+      else if (oldCls) { line.styleClasses = null; }
+      var ischange = !oldStyles || oldStyles.length != line.styles.length ||
+        oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
+      for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i]; }
+      if (ischange) { changedLines.push(context.line); }
+      line.stateAfter = context.save();
+      context.nextLine();
+    } else {
+      if (line.text.length <= cm.options.maxHighlightLength)
+        { processLine(cm, line.text, context); }
+      line.stateAfter = context.line % 5 == 0 ? context.save() : null;
+      context.nextLine();
+    }
+    if (+new Date > end) {
+      startWorker(cm, cm.options.workDelay);
+      return true
+    }
+  });
+  doc.highlightFrontier = context.line;
+  doc.modeFrontier = Math.max(doc.modeFrontier, context.line);
+  if (changedLines.length) { runInOp(cm, function () {
+    for (var i = 0; i < changedLines.length; i++)
+      { regLineChange(cm, changedLines[i], "text"); }
+  }); }
+}
+
+// DISPLAY DRAWING
+
+var DisplayUpdate = function(cm, viewport, force) {
+  var display = cm.display;
+
+  this.viewport = viewport;
+  // Store some values that we'll need later (but don't want to force a relayout for)
+  this.visible = visibleLines(display, cm.doc, viewport);
+  this.editorIsHidden = !display.wrapper.offsetWidth;
+  this.wrapperHeight = display.wrapper.clientHeight;
+  this.wrapperWidth = display.wrapper.clientWidth;
+  this.oldDisplayWidth = displayWidth(cm);
+  this.force = force;
+  this.dims = getDimensions(cm);
+  this.events = [];
+};
+
+DisplayUpdate.prototype.signal = function (emitter, type) {
+  if (hasHandler(emitter, type))
+    { this.events.push(arguments); }
+};
+DisplayUpdate.prototype.finish = function () {
+    var this$1 = this;
+
+  for (var i = 0; i < this.events.length; i++)
+    { signal.apply(null, this$1.events[i]); }
+};
+
+function maybeClipScrollbars(cm) {
+  var display = cm.display;
+  if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
+    display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
+    display.heightForcer.style.height = scrollGap(cm) + "px";
+    display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
+    display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
+    display.scrollbarsClipped = true;
+  }
+}
+
+function selectionSnapshot(cm) {
+  if (cm.hasFocus()) { return null }
+  var active = activeElt();
+  if (!active || !contains(cm.display.lineDiv, active)) { return null }
+  var result = {activeElt: active};
+  if (window.getSelection) {
+    var sel = window.getSelection();
+    if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
+      result.anchorNode = sel.anchorNode;
+      result.anchorOffset = sel.anchorOffset;
+      result.focusNode = sel.focusNode;
+      result.focusOffset = sel.focusOffset;
+    }
+  }
+  return result
+}
+
+function restoreSelection(snapshot) {
+  if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
+  snapshot.activeElt.focus();
+  if (snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
+    var sel = window.getSelection(), range$$1 = document.createRange();
+    range$$1.setEnd(snapshot.anchorNode, snapshot.anchorOffset);
+    range$$1.collapse(false);
+    sel.removeAllRanges();
+    sel.addRange(range$$1);
+    sel.extend(snapshot.focusNode, snapshot.focusOffset);
+  }
+}
+
+// Does the actual updating of the line display. Bails out
+// (returning false) when there is nothing to be done and forced is
+// false.
+function updateDisplayIfNeeded(cm, update) {
+  var display = cm.display, doc = cm.doc;
+
+  if (update.editorIsHidden) {
+    resetView(cm);
+    return false
+  }
+
+  // Bail out if the visible area is already rendered and nothing changed.
+  if (!update.force &&
+      update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
+      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
+      display.renderedView == display.view && countDirtyView(cm) == 0)
+    { return false }
+
+  if (maybeUpdateLineNumberWidth(cm)) {
+    resetView(cm);
+    update.dims = getDimensions(cm);
+  }
+
+  // Compute a suitable new viewport (from & to)
+  var end = doc.first + doc.size;
+  var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
+  var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
+  if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom); }
+  if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo); }
+  if (sawCollapsedSpans) {
+    from = visualLineNo(cm.doc, from);
+    to = visualLineEndNo(cm.doc, to);
+  }
+
+  var different = from != display.viewFrom || to != display.viewTo ||
+    display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
+  adjustView(cm, from, to);
+
+  display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
+  // Position the mover div to align with the current scroll position
+  cm.display.mover.style.top = display.viewOffset + "px";
+
+  var toUpdate = countDirtyView(cm);
+  if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
+      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
+    { return false }
+
+  // For big changes, we hide the enclosing element during the
+  // update, since that speeds up the operations on most browsers.
+  var selSnapshot = selectionSnapshot(cm);
+  if (toUpdate > 4) { display.lineDiv.style.display = "none"; }
+  patchDisplay(cm, display.updateLineNumbers, update.dims);
+  if (toUpdate > 4) { display.lineDiv.style.display = ""; }
+  display.renderedView = display.view;
+  // There might have been a widget with a focused element that got
+  // hidden or updated, if so re-focus it.
+  restoreSelection(selSnapshot);
+
+  // Prevent selection and cursors from interfering with the scroll
+  // width and height.
+  removeChildren(display.cursorDiv);
+  removeChildren(display.selectionDiv);
+  display.gutters.style.height = display.sizer.style.minHeight = 0;
+
+  if (different) {
+    display.lastWrapHeight = update.wrapperHeight;
+    display.lastWrapWidth = update.wrapperWidth;
+    startWorker(cm, 400);
+  }
+
+  display.updateLineNumbers = null;
+
+  return true
+}
+
+function postUpdateDisplay(cm, update) {
+  var viewport = update.viewport;
+
+  for (var first = true;; first = false) {
+    if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
+      // Clip forced viewport to actual scrollable area.
+      if (viewport && viewport.top != null)
+        { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)}; }
+      // Updated line heights might result in the drawn area not
+      // actually covering the viewport. Keep looping until it does.
+      update.visible = visibleLines(cm.display, cm.doc, viewport);
+      if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
+        { break }
+    }
+    if (!updateDisplayIfNeeded(cm, update)) { break }
+    updateHeightsInViewport(cm);
+    var barMeasure = measureForScrollbars(cm);
+    updateSelection(cm);
+    updateScrollbars(cm, barMeasure);
+    setDocumentHeight(cm, barMeasure);
+    update.force = false;
+  }
+
+  update.signal(cm, "update", cm);
+  if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
+    update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
+    cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
+  }
+}
+
+function updateDisplaySimple(cm, viewport) {
+  var update = new DisplayUpdate(cm, viewport);
+  if (updateDisplayIfNeeded(cm, update)) {
+    updateHeightsInViewport(cm);
+    postUpdateDisplay(cm, update);
+    var barMeasure = measureForScrollbars(cm);
+    updateSelection(cm);
+    updateScrollbars(cm, barMeasure);
+    setDocumentHeight(cm, barMeasure);
+    update.finish();
+  }
+}
+
+// Sync the actual display DOM structure with display.view, removing
+// nodes for lines that are no longer in view, and creating the ones
+// that are not there yet, and updating the ones that are out of
+// date.
+function patchDisplay(cm, updateNumbersFrom, dims) {
+  var display = cm.display, lineNumbers = cm.options.lineNumbers;
+  var container = display.lineDiv, cur = container.firstChild;
+
+  function rm(node) {
+    var next = node.nextSibling;
+    // Works around a throw-scroll bug in OS X Webkit
+    if (webkit && mac && cm.display.currentWheelTarget == node)
+      { node.style.display = "none"; }
+    else
+      { node.parentNode.removeChild(node); }
+    return next
+  }
+
+  var view = display.view, lineN = display.viewFrom;
+  // Loop over the elements in the view, syncing cur (the DOM nodes
+  // in display.lineDiv) with the view as we go.
+  for (var i = 0; i < view.length; i++) {
+    var lineView = view[i];
+    if (lineView.hidden) {
+    } else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
+      var node = buildLineElement(cm, lineView, lineN, dims);
+      container.insertBefore(node, cur);
+    } else { // Already drawn
+      while (cur != lineView.node) { cur = rm(cur); }
+      var updateNumber = lineNumbers && updateNumbersFrom != null &&
+        updateNumbersFrom <= lineN && lineView.lineNumber;
+      if (lineView.changes) {
+        if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false; }
+        updateLineForChanges(cm, lineView, lineN, dims);
+      }
+      if (updateNumber) {
+        removeChildren(lineView.lineNumber);
+        lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
+      }
+      cur = lineView.node.nextSibling;
+    }
+    lineN += lineView.size;
+  }
+  while (cur) { cur = rm(cur); }
+}
+
+function updateGutterSpace(cm) {
+  var width = cm.display.gutters.offsetWidth;
+  cm.display.sizer.style.marginLeft = width + "px";
+}
+
+function setDocumentHeight(cm, measure) {
+  cm.display.sizer.style.minHeight = measure.docHeight + "px";
+  cm.display.heightForcer.style.top = measure.docHeight + "px";
+  cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
+}
+
+// Rebuild the gutter elements, ensure the margin to the left of the
+// code matches their width.
+function updateGutters(cm) {
+  var gutters = cm.display.gutters, specs = cm.options.gutters;
+  removeChildren(gutters);
+  var i = 0;
+  for (; i < specs.length; ++i) {
+    var gutterClass = specs[i];
+    var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
+    if (gutterClass == "CodeMirror-linenumbers") {
+      cm.display.lineGutter = gElt;
+      gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
+    }
+  }
+  gutters.style.display = i ? "" : "none";
+  updateGutterSpace(cm);
+}
+
+// Make sure the gutters options contains the element
+// "CodeMirror-linenumbers" when the lineNumbers option is true.
+function setGuttersForLineNumbers(options) {
+  var found = indexOf(options.gutters, "CodeMirror-linenumbers");
+  if (found == -1 && options.lineNumbers) {
+    options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]);
+  } else if (found > -1 && !options.lineNumbers) {
+    options.gutters = options.gutters.slice(0);
+    options.gutters.splice(found, 1);
+  }
+}
+
+// Since the delta values reported on mouse wheel events are
+// unstandardized between browsers and even browser versions, and
+// generally horribly unpredictable, this code starts by measuring
+// the scroll effect that the first few mouse wheel events have,
+// and, from that, detects the way it can convert deltas to pixel
+// offsets afterwards.
+//
+// The reason we want to know the amount a wheel event will scroll
+// is that it gives us a chance to update the display before the
+// actual scrolling happens, reducing flickering.
+
+var wheelSamples = 0;
+var wheelPixelsPerUnit = null;
+// Fill in a browser-detected starting value on browsers where we
+// know one. These don't have to be accurate -- the result of them
+// being wrong would just be a slight flicker on the first wheel
+// scroll (if it is large enough).
+if (ie) { wheelPixelsPerUnit = -.53; }
+else if (gecko) { wheelPixelsPerUnit = 15; }
+else if (chrome) { wheelPixelsPerUnit = -.7; }
+else if (safari) { wheelPixelsPerUnit = -1/3; }
+
+function wheelEventDelta(e) {
+  var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
+  if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail; }
+  if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail; }
+  else if (dy == null) { dy = e.wheelDelta; }
+  return {x: dx, y: dy}
+}
+function wheelEventPixels(e) {
+  var delta = wheelEventDelta(e);
+  delta.x *= wheelPixelsPerUnit;
+  delta.y *= wheelPixelsPerUnit;
+  return delta
+}
+
+function onScrollWheel(cm, e) {
+  var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;
+
+  var display = cm.display, scroll = display.scroller;
+  // Quit if there's nothing to scroll here
+  var canScrollX = scroll.scrollWidth > scroll.clientWidth;
+  var canScrollY = scroll.scrollHeight > scroll.clientHeight;
+  if (!(dx && canScrollX || dy && canScrollY)) { return }
+
+  // Webkit browsers on OS X abort momentum scrolls when the target
+  // of the scroll event is removed from the scrollable element.
+  // This hack (see related code in patchDisplay) makes sure the
+  // element is kept around.
+  if (dy && mac && webkit) {
+    outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
+      for (var i = 0; i < view.length; i++) {
+        if (view[i].node == cur) {
+          cm.display.currentWheelTarget = cur;
+          break outer
+        }
+      }
+    }
+  }
+
+  // On some browsers, horizontal scrolling will cause redraws to
+  // happen before the gutter has been realigned, causing it to
+  // wriggle around in a most unseemly way. When we have an
+  // estimated pixels/delta value, we just handle horizontal
+  // scrolling entirely here. It'll be slightly off from native, but
+  // better than glitching out.
+  if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
+    if (dy && canScrollY)
+      { updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)); }
+    setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit));
+    // Only prevent default scrolling if vertical scrolling is
+    // actually possible. Otherwise, it causes vertical scroll
+    // jitter on OSX trackpads when deltaX is small and deltaY
+    // is large (issue #3579)
+    if (!dy || (dy && canScrollY))
+      { e_preventDefault(e); }
+    display.wheelStartX = null; // Abort measurement, if in progress
+    return
+  }
+
+  // 'Project' the visible viewport to cover the area that is being
+  // scrolled into view (if we know enough to estimate it).
+  if (dy && wheelPixelsPerUnit != null) {
+    var pixels = dy * wheelPixelsPerUnit;
+    var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
+    if (pixels < 0) { top = Math.max(0, top + pixels - 50); }
+    else { bot = Math.min(cm.doc.height, bot + pixels + 50); }
+    updateDisplaySimple(cm, {top: top, bottom: bot});
+  }
+
+  if (wheelSamples < 20) {
+    if (display.wheelStartX == null) {
+      display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
+      display.wheelDX = dx; display.wheelDY = dy;
+      setTimeout(function () {
+        if (display.wheelStartX == null) { return }
+        var movedX = scroll.scrollLeft - display.wheelStartX;
+        var movedY = scroll.scrollTop - display.wheelStartY;
+        var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
+          (movedX && display.wheelDX && movedX / display.wheelDX);
+        display.wheelStartX = display.wheelStartY = null;
+        if (!sample) { return }
+        wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
+        ++wheelSamples;
+      }, 200);
+    } else {
+      display.wheelDX += dx; display.wheelDY += dy;
+    }
+  }
+}
+
+// Selection objects are immutable. A new one is created every time
+// the selection changes. A selection is one or more non-overlapping
+// (and non-touching) ranges, sorted, and an integer that indicates
+// which one is the primary selection (the one that's scrolled into
+// view, that getCursor returns, etc).
+var Selection = function(ranges, primIndex) {
+  this.ranges = ranges;
+  this.primIndex = primIndex;
+};
+
+Selection.prototype.primary = function () { return this.ranges[this.primIndex] };
+
+Selection.prototype.equals = function (other) {
+    var this$1 = this;
+
+  if (other == this) { return true }
+  if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
+  for (var i = 0; i < this.ranges.length; i++) {
+    var here = this$1.ranges[i], there = other.ranges[i];
+    if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
+  }
+  return true
+};
+
+Selection.prototype.deepCopy = function () {
+    var this$1 = this;
+
+  var out = [];
+  for (var i = 0; i < this.ranges.length; i++)
+    { out[i] = new Range(copyPos(this$1.ranges[i].anchor), copyPos(this$1.ranges[i].head)); }
+  return new Selection(out, this.primIndex)
+};
+
+Selection.prototype.somethingSelected = function () {
+    var this$1 = this;
+
+  for (var i = 0; i < this.ranges.length; i++)
+    { if (!this$1.ranges[i].empty()) { return true } }
+  return false
+};
+
+Selection.prototype.contains = function (pos, end) {
+    var this$1 = this;
+
+  if (!end) { end = pos; }
+  for (var i = 0; i < this.ranges.length; i++) {
+    var range = this$1.ranges[i];
+    if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
+      { return i }
+  }
+  return -1
+};
+
+var Range = function(anchor, head) {
+  this.anchor = anchor; this.head = head;
+};
+
+Range.prototype.from = function () { return minPos(this.anchor, this.head) };
+Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
+Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };
+
+// Take an unsorted, potentially overlapping set of ranges, and
+// build a selection out of it. 'Consumes' ranges array (modifying
+// it).
+function normalizeSelection(ranges, primIndex) {
+  var prim = ranges[primIndex];
+  ranges.sort(function (a, b) { return cmp(a.from(), b.from()); });
+  primIndex = indexOf(ranges, prim);
+  for (var i = 1; i < ranges.length; i++) {
+    var cur = ranges[i], prev = ranges[i - 1];
+    if (cmp(prev.to(), cur.from()) >= 0) {
+      var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
+      var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
+      if (i <= primIndex) { --primIndex; }
+      ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
+    }
+  }
+  return new Selection(ranges, primIndex)
+}
+
+function simpleSelection(anchor, head) {
+  return new Selection([new Range(anchor, head || anchor)], 0)
+}
+
+// Compute the position of the end of a change (its 'to' property
+// refers to the pre-change end).
+function changeEnd(change) {
+  if (!change.text) { return change.to }
+  return Pos(change.from.line + change.text.length - 1,
+             lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
+}
+
+// Adjust a position to refer to the post-change position of the
+// same text, or the end of the change if the change covers it.
+function adjustForChange(pos, change) {
+  if (cmp(pos, change.from) < 0) { return pos }
+  if (cmp(pos, change.to) <= 0) { return changeEnd(change) }
+
+  var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
+  if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch; }
+  return Pos(line, ch)
+}
+
+function computeSelAfterChange(doc, change) {
+  var out = [];
+  for (var i = 0; i < doc.sel.ranges.length; i++) {
+    var range = doc.sel.ranges[i];
+    out.push(new Range(adjustForChange(range.anchor, change),
+                       adjustForChange(range.head, change)));
+  }
+  return normalizeSelection(out, doc.sel.primIndex)
+}
+
+function offsetPos(pos, old, nw) {
+  if (pos.line == old.line)
+    { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
+  else
+    { return Pos(nw.line + (pos.line - old.line), pos.ch) }
+}
+
+// Used by replaceSelections to allow moving the selection to the
+// start or around the replaced test. Hint may be "start" or "around".
+function computeReplacedSel(doc, changes, hint) {
+  var out = [];
+  var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
+  for (var i = 0; i < changes.length; i++) {
+    var change = changes[i];
+    var from = offsetPos(change.from, oldPrev, newPrev);
+    var to = offsetPos(changeEnd(change), oldPrev, newPrev);
+    oldPrev = change.to;
+    newPrev = to;
+    if (hint == "around") {
+      var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
+      out[i] = new Range(inv ? to : from, inv ? from : to);
+    } else {
+      out[i] = new Range(from, from);
+    }
+  }
+  return new Selection(out, doc.sel.primIndex)
+}
+
+// Used to get the editor into a consistent state again when options change.
+
+function loadMode(cm) {
+  cm.doc.mode = getMode(cm.options, cm.doc.modeOption);
+  resetModeState(cm);
+}
+
+function resetModeState(cm) {
+  cm.doc.iter(function (line) {
+    if (line.stateAfter) { line.stateAfter = null; }
+    if (line.styles) { line.styles = null; }
+  });
+  cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first;
+  startWorker(cm, 100);
+  cm.state.modeGen++;
+  if (cm.curOp) { regChange(cm); }
+}
+
+// DOCUMENT DATA STRUCTURE
+
+// By default, updates that start and end at the beginning of a line
+// are treated specially, in order to make the association of line
+// widgets and marker elements with the text behave more intuitive.
+function isWholeLineUpdate(doc, change) {
+  return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
+    (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
+}
+
+// Perform a change on the document data structure.
+function updateDoc(doc, change, markedSpans, estimateHeight$$1) {
+  function spansFor(n) {return markedSpans ? markedSpans[n] : null}
+  function update(line, text, spans) {
+    updateLine(line, text, spans, estimateHeight$$1);
+    signalLater(line, "change", line, change);
+  }
+  function linesFor(start, end) {
+    var result = [];
+    for (var i = start; i < end; ++i)
+      { result.push(new Line(text[i], spansFor(i), estimateHeight$$1)); }
+    return result
+  }
+
+  var from = change.from, to = change.to, text = change.text;
+  var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
+  var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
+
+  // Adjust the line structure
+  if (change.full) {
+    doc.insert(0, linesFor(0, text.length));
+    doc.remove(text.length, doc.size - text.length);
+  } else if (isWholeLineUpdate(doc, change)) {
+    // This is a whole-line replace. Treated specially to make
+    // sure line objects move the way they are supposed to.
+    var added = linesFor(0, text.length - 1);
+    update(lastLine, lastLine.text, lastSpans);
+    if (nlines) { doc.remove(from.line, nlines); }
+    if (added.length) { doc.insert(from.line, added); }
+  } else if (firstLine == lastLine) {
+    if (text.length == 1) {
+      update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
+    } else {
+      var added$1 = linesFor(1, text.length - 1);
+      added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight$$1));
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+      doc.insert(from.line + 1, added$1);
+    }
+  } else if (text.length == 1) {
+    update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
+    doc.remove(from.line + 1, nlines);
+  } else {
+    update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+    update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
+    var added$2 = linesFor(1, text.length - 1);
+    if (nlines > 1) { doc.remove(from.line + 1, nlines - 1); }
+    doc.insert(from.line + 1, added$2);
+  }
+
+  signalLater(doc, "change", doc, change);
+}
+
+// Call f for all linked documents.
+function linkedDocs(doc, f, sharedHistOnly) {
+  function propagate(doc, skip, sharedHist) {
+    if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
+      var rel = doc.linked[i];
+      if (rel.doc == skip) { continue }
+      var shared = sharedHist && rel.sharedHist;
+      if (sharedHistOnly && !shared) { continue }
+      f(rel.doc, shared);
+      propagate(rel.doc, doc, shared);
+    } }
+  }
+  propagate(doc, null, true);
+}
+
+// Attach a document to an editor.
+function attachDoc(cm, doc) {
+  if (doc.cm) { throw new Error("This document is already in use.") }
+  cm.doc = doc;
+  doc.cm = cm;
+  estimateLineHeights(cm);
+  loadMode(cm);
+  setDirectionClass(cm);
+  if (!cm.options.lineWrapping) { findMaxLine(cm); }
+  cm.options.mode = doc.modeOption;
+  regChange(cm);
+}
+
+function setDirectionClass(cm) {
+  (cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl");
+}
+
+function directionChanged(cm) {
+  runInOp(cm, function () {
+    setDirectionClass(cm);
+    regChange(cm);
+  });
+}
+
+function History(startGen) {
+  // Arrays of change events and selections. Doing something adds an
+  // event to done and clears undo. Undoing moves events from done
+  // to undone, redoing moves them in the other direction.
+  this.done = []; this.undone = [];
+  this.undoDepth = Infinity;
+  // Used to track when changes can be merged into a single undo
+  // event
+  this.lastModTime = this.lastSelTime = 0;
+  this.lastOp = this.lastSelOp = null;
+  this.lastOrigin = this.lastSelOrigin = null;
+  // Used by the isClean() method
+  this.generation = this.maxGeneration = startGen || 1;
+}
+
+// Create a history change event from an updateDoc-style change
+// object.
+function historyChangeFromChange(doc, change) {
+  var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
+  attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
+  linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true);
+  return histChange
+}
+
+// Pop all selection events off the end of a history array. Stop at
+// a change event.
+function clearSelectionEvents(array) {
+  while (array.length) {
+    var last = lst(array);
+    if (last.ranges) { array.pop(); }
+    else { break }
+  }
+}
+
+// Find the top change event in the history. Pop off selection
+// events that are in the way.
+function lastChangeEvent(hist, force) {
+  if (force) {
+    clearSelectionEvents(hist.done);
+    return lst(hist.done)
+  } else if (hist.done.length && !lst(hist.done).ranges) {
+    return lst(hist.done)
+  } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
+    hist.done.pop();
+    return lst(hist.done)
+  }
+}
+
+// Register a change in the history. Merges changes that are within
+// a single operation, or are close together with an origin that
+// allows merging (starting with "+") into a single event.
+function addChangeToHistory(doc, change, selAfter, opId) {
+  var hist = doc.history;
+  hist.undone.length = 0;
+  var time = +new Date, cur;
+  var last;
+
+  if ((hist.lastOp == opId ||
+       hist.lastOrigin == change.origin && change.origin &&
+       ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
+        change.origin.charAt(0) == "*")) &&
+      (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
+    // Merge this change into the last event
+    last = lst(cur.changes);
+    if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
+      // Optimized case for simple insertion -- don't want to add
+      // new changesets for every character typed
+      last.to = changeEnd(change);
+    } else {
+      // Add new sub-event
+      cur.changes.push(historyChangeFromChange(doc, change));
+    }
+  } else {
+    // Can not be merged, start a new event.
+    var before = lst(hist.done);
+    if (!before || !before.ranges)
+      { pushSelectionToHistory(doc.sel, hist.done); }
+    cur = {changes: [historyChangeFromChange(doc, change)],
+           generation: hist.generation};
+    hist.done.push(cur);
+    while (hist.done.length > hist.undoDepth) {
+      hist.done.shift();
+      if (!hist.done[0].ranges) { hist.done.shift(); }
+    }
+  }
+  hist.done.push(selAfter);
+  hist.generation = ++hist.maxGeneration;
+  hist.lastModTime = hist.lastSelTime = time;
+  hist.lastOp = hist.lastSelOp = opId;
+  hist.lastOrigin = hist.lastSelOrigin = change.origin;
+
+  if (!last) { signal(doc, "historyAdded"); }
+}
+
+function selectionEventCanBeMerged(doc, origin, prev, sel) {
+  var ch = origin.charAt(0);
+  return ch == "*" ||
+    ch == "+" &&
+    prev.ranges.length == sel.ranges.length &&
+    prev.somethingSelected() == sel.somethingSelected() &&
+    new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
+}
+
+// Called whenever the selection changes, sets the new selection as
+// the pending selection in the history, and pushes the old pending
+// selection into the 'done' array when it was significantly
+// different (in number of selected ranges, emptiness, or time).
+function addSelectionToHistory(doc, sel, opId, options) {
+  var hist = doc.history, origin = options && options.origin;
+
+  // A new event is started when the previous origin does not match
+  // the current, or the origins don't allow matching. Origins
+  // starting with * are always merged, those starting with + are
+  // merged when similar and close together in time.
+  if (opId == hist.lastSelOp ||
+      (origin && hist.lastSelOrigin == origin &&
+       (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
+        selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
+    { hist.done[hist.done.length - 1] = sel; }
+  else
+    { pushSelectionToHistory(sel, hist.done); }
+
+  hist.lastSelTime = +new Date;
+  hist.lastSelOrigin = origin;
+  hist.lastSelOp = opId;
+  if (options && options.clearRedo !== false)
+    { clearSelectionEvents(hist.undone); }
+}
+
+function pushSelectionToHistory(sel, dest) {
+  var top = lst(dest);
+  if (!(top && top.ranges && top.equals(sel)))
+    { dest.push(sel); }
+}
+
+// Used to store marked span information in the history.
+function attachLocalSpans(doc, change, from, to) {
+  var existing = change["spans_" + doc.id], n = 0;
+  doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
+    if (line.markedSpans)
+      { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; }
+    ++n;
+  });
+}
+
+// When un/re-doing restores text containing marked spans, those
+// that have been explicitly cleared should not be restored.
+function removeClearedSpans(spans) {
+  if (!spans) { return null }
+  var out;
+  for (var i = 0; i < spans.length; ++i) {
+    if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i); } }
+    else if (out) { out.push(spans[i]); }
+  }
+  return !out ? spans : out.length ? out : null
+}
+
+// Retrieve and filter the old marked spans stored in a change event.
+function getOldSpans(doc, change) {
+  var found = change["spans_" + doc.id];
+  if (!found) { return null }
+  var nw = [];
+  for (var i = 0; i < change.text.length; ++i)
+    { nw.push(removeClearedSpans(found[i])); }
+  return nw
+}
+
+// Used for un/re-doing changes from the history. Combines the
+// result of computing the existing spans with the set of spans that
+// existed in the history (so that deleting around a span and then
+// undoing brings back the span).
+function mergeOldSpans(doc, change) {
+  var old = getOldSpans(doc, change);
+  var stretched = stretchSpansOverChange(doc, change);
+  if (!old) { return stretched }
+  if (!stretched) { return old }
+
+  for (var i = 0; i < old.length; ++i) {
+    var oldCur = old[i], stretchCur = stretched[i];
+    if (oldCur && stretchCur) {
+      spans: for (var j = 0; j < stretchCur.length; ++j) {
+        var span = stretchCur[j];
+        for (var k = 0; k < oldCur.length; ++k)
+          { if (oldCur[k].marker == span.marker) { continue spans } }
+        oldCur.push(span);
+      }
+    } else if (stretchCur) {
+      old[i] = stretchCur;
+    }
+  }
+  return old
+}
+
+// Used both to provide a JSON-safe object in .getHistory, and, when
+// detaching a document, to split the history in two
+function copyHistoryArray(events, newGroup, instantiateSel) {
+  var copy = [];
+  for (var i = 0; i < events.length; ++i) {
+    var event = events[i];
+    if (event.ranges) {
+      copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
+      continue
+    }
+    var changes = event.changes, newChanges = [];
+    copy.push({changes: newChanges});
+    for (var j = 0; j < changes.length; ++j) {
+      var change = changes[j], m = (void 0);
+      newChanges.push({from: change.from, to: change.to, text: change.text});
+      if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
+        if (indexOf(newGroup, Number(m[1])) > -1) {
+          lst(newChanges)[prop] = change[prop];
+          delete change[prop];
+        }
+      } } }
+    }
+  }
+  return copy
+}
+
+// The 'scroll' parameter given to many of these indicated whether
+// the new cursor position should be scrolled into view after
+// modifying the selection.
+
+// If shift is held or the extend flag is set, extends a range to
+// include a given position (and optionally a second position).
+// Otherwise, simply returns the range between the given positions.
+// Used for cursor motion and such.
+function extendRange(range, head, other, extend) {
+  if (extend) {
+    var anchor = range.anchor;
+    if (other) {
+      var posBefore = cmp(head, anchor) < 0;
+      if (posBefore != (cmp(other, anchor) < 0)) {
+        anchor = head;
+        head = other;
+      } else if (posBefore != (cmp(head, other) < 0)) {
+        head = other;
+      }
+    }
+    return new Range(anchor, head)
+  } else {
+    return new Range(other || head, head)
+  }
+}
+
+// Extend the primary selection range, discard the rest.
+function extendSelection(doc, head, other, options, extend) {
+  if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend); }
+  setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options);
+}
+
+// Extend all selections (pos is an array of selections with length
+// equal the number of selections)
+function extendSelections(doc, heads, options) {
+  var out = [];
+  var extend = doc.cm && (doc.cm.display.shift || doc.extend);
+  for (var i = 0; i < doc.sel.ranges.length; i++)
+    { out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend); }
+  var newSel = normalizeSelection(out, doc.sel.primIndex);
+  setSelection(doc, newSel, options);
+}
+
+// Updates a single range in the selection.
+function replaceOneSelection(doc, i, range, options) {
+  var ranges = doc.sel.ranges.slice(0);
+  ranges[i] = range;
+  setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options);
+}
+
+// Reset the selection to a single range.
+function setSimpleSelection(doc, anchor, head, options) {
+  setSelection(doc, simpleSelection(anchor, head), options);
+}
+
+// Give beforeSelectionChange handlers a change to influence a
+// selection update.
+function filterSelectionChange(doc, sel, options) {
+  var obj = {
+    ranges: sel.ranges,
+    update: function(ranges) {
+      var this$1 = this;
+
+      this.ranges = [];
+      for (var i = 0; i < ranges.length; i++)
+        { this$1.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
+                                   clipPos(doc, ranges[i].head)); }
+    },
+    origin: options && options.origin
+  };
+  signal(doc, "beforeSelectionChange", doc, obj);
+  if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj); }
+  if (obj.ranges != sel.ranges) { return normalizeSelection(obj.ranges, obj.ranges.length - 1) }
+  else { return sel }
+}
+
+function setSelectionReplaceHistory(doc, sel, options) {
+  var done = doc.history.done, last = lst(done);
+  if (last && last.ranges) {
+    done[done.length - 1] = sel;
+    setSelectionNoUndo(doc, sel, options);
+  } else {
+    setSelection(doc, sel, options);
+  }
+}
+
+// Set a new selection.
+function setSelection(doc, sel, options) {
+  setSelectionNoUndo(doc, sel, options);
+  addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
+}
+
+function setSelectionNoUndo(doc, sel, options) {
+  if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
+    { sel = filterSelectionChange(doc, sel, options); }
+
+  var bias = options && options.bias ||
+    (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
+  setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));
+
+  if (!(options && options.scroll === false) && doc.cm)
+    { ensureCursorVisible(doc.cm); }
+}
+
+function setSelectionInner(doc, sel) {
+  if (sel.equals(doc.sel)) { return }
+
+  doc.sel = sel;
+
+  if (doc.cm) {
+    doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true;
+    signalCursorActivity(doc.cm);
+  }
+  signalLater(doc, "cursorActivity", doc);
+}
+
+// Verify that the selection does not partially select any atomic
+// marked ranges.
+function reCheckSelection(doc) {
+  setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false));
+}
+
+// Return a selection that does not partially select any atomic
+// ranges.
+function skipAtomicInSelection(doc, sel, bias, mayClear) {
+  var out;
+  for (var i = 0; i < sel.ranges.length; i++) {
+    var range = sel.ranges[i];
+    var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
+    var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
+    var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
+    if (out || newAnchor != range.anchor || newHead != range.head) {
+      if (!out) { out = sel.ranges.slice(0, i); }
+      out[i] = new Range(newAnchor, newHead);
+    }
+  }
+  return out ? normalizeSelection(out, sel.primIndex) : sel
+}
+
+function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
+  var line = getLine(doc, pos.line);
+  if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+    var sp = line.markedSpans[i], m = sp.marker;
+    if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
+        (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
+      if (mayClear) {
+        signal(m, "beforeCursorEnter");
+        if (m.explicitlyCleared) {
+          if (!line.markedSpans) { break }
+          else {--i; continue}
+        }
+      }
+      if (!m.atomic) { continue }
+
+      if (oldPos) {
+        var near = m.find(dir < 0 ? 1 : -1), diff = (void 0);
+        if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
+          { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null); }
+        if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
+          { return skipAtomicInner(doc, near, pos, dir, mayClear) }
+      }
+
+      var far = m.find(dir < 0 ? -1 : 1);
+      if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
+        { far = movePos(doc, far, dir, far.line == pos.line ? line : null); }
+      return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
+    }
+  } }
+  return pos
+}
+
+// Ensure a given position is not inside an atomic range.
+function skipAtomic(doc, pos, oldPos, bias, mayClear) {
+  var dir = bias || 1;
+  var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
+      (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
+      skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
+      (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
+  if (!found) {
+    doc.cantEdit = true;
+    return Pos(doc.first, 0)
+  }
+  return found
+}
+
+function movePos(doc, pos, dir, line) {
+  if (dir < 0 && pos.ch == 0) {
+    if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
+    else { return null }
+  } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
+    if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
+    else { return null }
+  } else {
+    return new Pos(pos.line, pos.ch + dir)
+  }
+}
+
+function selectAll(cm) {
+  cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);
+}
+
+// UPDATING
+
+// Allow "beforeChange" event handlers to influence a change
+function filterChange(doc, change, update) {
+  var obj = {
+    canceled: false,
+    from: change.from,
+    to: change.to,
+    text: change.text,
+    origin: change.origin,
+    cancel: function () { return obj.canceled = true; }
+  };
+  if (update) { obj.update = function (from, to, text, origin) {
+    if (from) { obj.from = clipPos(doc, from); }
+    if (to) { obj.to = clipPos(doc, to); }
+    if (text) { obj.text = text; }
+    if (origin !== undefined) { obj.origin = origin; }
+  }; }
+  signal(doc, "beforeChange", doc, obj);
+  if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj); }
+
+  if (obj.canceled) { return null }
+  return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
+}
+
+// Apply a change to a document, and add it to the document's
+// history, and propagating it to all linked documents.
+function makeChange(doc, change, ignoreReadOnly) {
+  if (doc.cm) {
+    if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
+    if (doc.cm.state.suppressEdits) { return }
+  }
+
+  if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
+    change = filterChange(doc, change, true);
+    if (!change) { return }
+  }
+
+  // Possibly split or suppress the update based on the presence
+  // of read-only spans in its range.
+  var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
+  if (split) {
+    for (var i = split.length - 1; i >= 0; --i)
+      { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text, origin: change.origin}); }
+  } else {
+    makeChangeInner(doc, change);
+  }
+}
+
+function makeChangeInner(doc, change) {
+  if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
+  var selAfter = computeSelAfterChange(doc, change);
+  addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
+
+  makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
+  var rebased = [];
+
+  linkedDocs(doc, function (doc, sharedHist) {
+    if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+      rebaseHist(doc.history, change);
+      rebased.push(doc.history);
+    }
+    makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
+  });
+}
+
+// Revert a change stored in a document's history.
+function makeChangeFromHistory(doc, type, allowSelectionOnly) {
+  if (doc.cm && doc.cm.state.suppressEdits && !allowSelectionOnly) { return }
+
+  var hist = doc.history, event, selAfter = doc.sel;
+  var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
+
+  // Verify that there is a useable event (so that ctrl-z won't
+  // needlessly clear selection events)
+  var i = 0;
+  for (; i < source.length; i++) {
+    event = source[i];
+    if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
+      { break }
+  }
+  if (i == source.length) { return }
+  hist.lastOrigin = hist.lastSelOrigin = null;
+
+  for (;;) {
+    event = source.pop();
+    if (event.ranges) {
+      pushSelectionToHistory(event, dest);
+      if (allowSelectionOnly && !event.equals(doc.sel)) {
+        setSelection(doc, event, {clearRedo: false});
+        return
+      }
+      selAfter = event;
+    }
+    else { break }
+  }
+
+  // Build up a reverse change object to add to the opposite history
+  // stack (redo when undoing, and vice versa).
+  var antiChanges = [];
+  pushSelectionToHistory(selAfter, dest);
+  dest.push({changes: antiChanges, generation: hist.generation});
+  hist.generation = event.generation || ++hist.maxGeneration;
+
+  var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
+
+  var loop = function ( i ) {
+    var change = event.changes[i];
+    change.origin = type;
+    if (filter && !filterChange(doc, change, false)) {
+      source.length = 0;
+      return {}
+    }
+
+    antiChanges.push(historyChangeFromChange(doc, change));
+
+    var after = i ? computeSelAfterChange(doc, change) : lst(source);
+    makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
+    if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}); }
+    var rebased = [];
+
+    // Propagate to the linked documents
+    linkedDocs(doc, function (doc, sharedHist) {
+      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+        rebaseHist(doc.history, change);
+        rebased.push(doc.history);
+      }
+      makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
+    });
+  };
+
+  for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
+    var returned = loop( i$1 );
+
+    if ( returned ) return returned.v;
+  }
+}
+
+// Sub-views need their line numbers shifted when text is added
+// above or below them in the parent document.
+function shiftDoc(doc, distance) {
+  if (distance == 0) { return }
+  doc.first += distance;
+  doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
+    Pos(range.anchor.line + distance, range.anchor.ch),
+    Pos(range.head.line + distance, range.head.ch)
+  ); }), doc.sel.primIndex);
+  if (doc.cm) {
+    regChange(doc.cm, doc.first, doc.first - distance, distance);
+    for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
+      { regLineChange(doc.cm, l, "gutter"); }
+  }
+}
+
+// More lower-level change function, handling only a single document
+// (not linked ones).
+function makeChangeSingleDoc(doc, change, selAfter, spans) {
+  if (doc.cm && !doc.cm.curOp)
+    { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }
+
+  if (change.to.line < doc.first) {
+    shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
+    return
+  }
+  if (change.from.line > doc.lastLine()) { return }
+
+  // Clip the change to the size of this doc
+  if (change.from.line < doc.first) {
+    var shift = change.text.length - 1 - (doc.first - change.from.line);
+    shiftDoc(doc, shift);
+    change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
+              text: [lst(change.text)], origin: change.origin};
+  }
+  var last = doc.lastLine();
+  if (change.to.line > last) {
+    change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
+              text: [change.text[0]], origin: change.origin};
+  }
+
+  change.removed = getBetween(doc, change.from, change.to);
+
+  if (!selAfter) { selAfter = computeSelAfterChange(doc, change); }
+  if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans); }
+  else { updateDoc(doc, change, spans); }
+  setSelectionNoUndo(doc, selAfter, sel_dontScroll);
+}
+
+// Handle the interaction of a change to a document with the editor
+// that this document is part of.
+function makeChangeSingleDocInEditor(cm, change, spans) {
+  var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
+
+  var recomputeMaxLength = false, checkWidthStart = from.line;
+  if (!cm.options.lineWrapping) {
+    checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
+    doc.iter(checkWidthStart, to.line + 1, function (line) {
+      if (line == display.maxLine) {
+        recomputeMaxLength = true;
+        return true
+      }
+    });
+  }
+
+  if (doc.sel.contains(change.from, change.to) > -1)
+    { signalCursorActivity(cm); }
+
+  updateDoc(doc, change, spans, estimateHeight(cm));
+
+  if (!cm.options.lineWrapping) {
+    doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
+      var len = lineLength(line);
+      if (len > display.maxLineLength) {
+        display.maxLine = line;
+        display.maxLineLength = len;
+        display.maxLineChanged = true;
+        recomputeMaxLength = false;
+      }
+    });
+    if (recomputeMaxLength) { cm.curOp.updateMaxLine = true; }
+  }
+
+  retreatFrontier(doc, from.line);
+  startWorker(cm, 400);
+
+  var lendiff = change.text.length - (to.line - from.line) - 1;
+  // Remember that these lines changed, for updating the display
+  if (change.full)
+    { regChange(cm); }
+  else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
+    { regLineChange(cm, from.line, "text"); }
+  else
+    { regChange(cm, from.line, to.line + 1, lendiff); }
+
+  var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
+  if (changeHandler || changesHandler) {
+    var obj = {
+      from: from, to: to,
+      text: change.text,
+      removed: change.removed,
+      origin: change.origin
+    };
+    if (changeHandler) { signalLater(cm, "change", cm, obj); }
+    if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj); }
+  }
+  cm.display.selForContextMenu = null;
+}
+
+function replaceRange(doc, code, from, to, origin) {
+  if (!to) { to = from; }
+  if (cmp(to, from) < 0) { var assign;
+    (assign = [to, from], from = assign[0], to = assign[1], assign); }
+  if (typeof code == "string") { code = doc.splitLines(code); }
+  makeChange(doc, {from: from, to: to, text: code, origin: origin});
+}
+
+// Rebasing/resetting history to deal with externally-sourced changes
+
+function rebaseHistSelSingle(pos, from, to, diff) {
+  if (to < pos.line) {
+    pos.line += diff;
+  } else if (from < pos.line) {
+    pos.line = from;
+    pos.ch = 0;
+  }
+}
+
+// Tries to rebase an array of history events given a change in the
+// document. If the change touches the same lines as the event, the
+// event, and everything 'behind' it, is discarded. If the change is
+// before the event, the event's positions are updated. Uses a
+// copy-on-write scheme for the positions, to avoid having to
+// reallocate them all on every rebase, but also avoid problems with
+// shared position objects being unsafely updated.
+function rebaseHistArray(array, from, to, diff) {
+  for (var i = 0; i < array.length; ++i) {
+    var sub = array[i], ok = true;
+    if (sub.ranges) {
+      if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
+      for (var j = 0; j < sub.ranges.length; j++) {
+        rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
+        rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
+      }
+      continue
+    }
+    for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
+      var cur = sub.changes[j$1];
+      if (to < cur.from.line) {
+        cur.from = Pos(cur.from.line + diff, cur.from.ch);
+        cur.to = Pos(cur.to.line + diff, cur.to.ch);
+      } else if (from <= cur.to.line) {
+        ok = false;
+        break
+      }
+    }
+    if (!ok) {
+      array.splice(0, i + 1);
+      i = 0;
+    }
+  }
+}
+
+function rebaseHist(hist, change) {
+  var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
+  rebaseHistArray(hist.done, from, to, diff);
+  rebaseHistArray(hist.undone, from, to, diff);
+}
+
+// Utility for applying a change to a line by handle or number,
+// returning the number and optionally registering the line as
+// changed.
+function changeLine(doc, handle, changeType, op) {
+  var no = handle, line = handle;
+  if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)); }
+  else { no = lineNo(handle); }
+  if (no == null) { return null }
+  if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType); }
+  return line
+}
+
+// The document is represented as a BTree consisting of leaves, with
+// chunk of lines in them, and branches, with up to ten leaves or
+// other branch nodes below them. The top node is always a branch
+// node, and is the document object itself (meaning it has
+// additional methods and properties).
+//
+// All nodes have parent links. The tree is used both to go from
+// line numbers to line objects, and to go from objects to numbers.
+// It also indexes by height, and is used to convert between height
+// and line object, and to find the total height of the document.
+//
+// See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
+
+function LeafChunk(lines) {
+  var this$1 = this;
+
+  this.lines = lines;
+  this.parent = null;
+  var height = 0;
+  for (var i = 0; i < lines.length; ++i) {
+    lines[i].parent = this$1;
+    height += lines[i].height;
+  }
+  this.height = height;
+}
+
+LeafChunk.prototype = {
+  chunkSize: function chunkSize() { return this.lines.length },
+
+  // Remove the n lines at offset 'at'.
+  removeInner: function removeInner(at, n) {
+    var this$1 = this;
+
+    for (var i = at, e = at + n; i < e; ++i) {
+      var line = this$1.lines[i];
+      this$1.height -= line.height;
+      cleanUpLine(line);
+      signalLater(line, "delete");
+    }
+    this.lines.splice(at, n);
+  },
+
+  // Helper used to collapse a small branch into a single leaf.
+  collapse: function collapse(lines) {
+    lines.push.apply(lines, this.lines);
+  },
+
+  // Insert the given array of lines at offset 'at', count them as
+  // having the given height.
+  insertInner: function insertInner(at, lines, height) {
+    var this$1 = this;
+
+    this.height += height;
+    this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
+    for (var i = 0; i < lines.length; ++i) { lines[i].parent = this$1; }
+  },
+
+  // Used to iterate over a part of the tree.
+  iterN: function iterN(at, n, op) {
+    var this$1 = this;
+
+    for (var e = at + n; at < e; ++at)
+      { if (op(this$1.lines[at])) { return true } }
+  }
+};
+
+function BranchChunk(children) {
+  var this$1 = this;
+
+  this.children = children;
+  var size = 0, height = 0;
+  for (var i = 0; i < children.length; ++i) {
+    var ch = children[i];
+    size += ch.chunkSize(); height += ch.height;
+    ch.parent = this$1;
+  }
+  this.size = size;
+  this.height = height;
+  this.parent = null;
+}
+
+BranchChunk.prototype = {
+  chunkSize: function chunkSize() { return this.size },
+
+  removeInner: function removeInner(at, n) {
+    var this$1 = this;
+
+    this.size -= n;
+    for (var i = 0; i < this.children.length; ++i) {
+      var child = this$1.children[i], sz = child.chunkSize();
+      if (at < sz) {
+        var rm = Math.min(n, sz - at), oldHeight = child.height;
+        child.removeInner(at, rm);
+        this$1.height -= oldHeight - child.height;
+        if (sz == rm) { this$1.children.splice(i--, 1); child.parent = null; }
+        if ((n -= rm) == 0) { break }
+        at = 0;
+      } else { at -= sz; }
+    }
+    // If the result is smaller than 25 lines, ensure that it is a
+    // single leaf node.
+    if (this.size - n < 25 &&
+        (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
+      var lines = [];
+      this.collapse(lines);
+      this.children = [new LeafChunk(lines)];
+      this.children[0].parent = this;
+    }
+  },
+
+  collapse: function collapse(lines) {
+    var this$1 = this;
+
+    for (var i = 0; i < this.children.length; ++i) { this$1.children[i].collapse(lines); }
+  },
+
+  insertInner: function insertInner(at, lines, height) {
+    var this$1 = this;
+
+    this.size += lines.length;
+    this.height += height;
+    for (var i = 0; i < this.children.length; ++i) {
+      var child = this$1.children[i], sz = child.chunkSize();
+      if (at <= sz) {
+        child.insertInner(at, lines, height);
+        if (child.lines && child.lines.length > 50) {
+          // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
+          // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
+          var remaining = child.lines.length % 25 + 25;
+          for (var pos = remaining; pos < child.lines.length;) {
+            var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
+            child.height -= leaf.height;
+            this$1.children.splice(++i, 0, leaf);
+            leaf.parent = this$1;
+          }
+          child.lines = child.lines.slice(0, remaining);
+          this$1.maybeSpill();
+        }
+        break
+      }
+      at -= sz;
+    }
+  },
+
+  // When a node has grown, check whether it should be split.
+  maybeSpill: function maybeSpill() {
+    if (this.children.length <= 10) { return }
+    var me = this;
+    do {
+      var spilled = me.children.splice(me.children.length - 5, 5);
+      var sibling = new BranchChunk(spilled);
+      if (!me.parent) { // Become the parent node
+        var copy = new BranchChunk(me.children);
+        copy.parent = me;
+        me.children = [copy, sibling];
+        me = copy;
+     } else {
+        me.size -= sibling.size;
+        me.height -= sibling.height;
+        var myIndex = indexOf(me.parent.children, me);
+        me.parent.children.splice(myIndex + 1, 0, sibling);
+      }
+      sibling.parent = me.parent;
+    } while (me.children.length > 10)
+    me.parent.maybeSpill();
+  },
+
+  iterN: function iterN(at, n, op) {
+    var this$1 = this;
+
+    for (var i = 0; i < this.children.length; ++i) {
+      var child = this$1.children[i], sz = child.chunkSize();
+      if (at < sz) {
+        var used = Math.min(n, sz - at);
+        if (child.iterN(at, used, op)) { return true }
+        if ((n -= used) == 0) { break }
+        at = 0;
+      } else { at -= sz; }
+    }
+  }
+};
+
+// Line widgets are block elements displayed above or below a line.
+
+var LineWidget = function(doc, node, options) {
+  var this$1 = this;
+
+  if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
+    { this$1[opt] = options[opt]; } } }
+  this.doc = doc;
+  this.node = node;
+};
+
+LineWidget.prototype.clear = function () {
+    var this$1 = this;
+
+  var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
+  if (no == null || !ws) { return }
+  for (var i = 0; i < ws.length; ++i) { if (ws[i] == this$1) { ws.splice(i--, 1); } }
+  if (!ws.length) { line.widgets = null; }
+  var height = widgetHeight(this);
+  updateLineHeight(line, Math.max(0, line.height - height));
+  if (cm) {
+    runInOp(cm, function () {
+      adjustScrollWhenAboveVisible(cm, line, -height);
+      regLineChange(cm, no, "widget");
+    });
+    signalLater(cm, "lineWidgetCleared", cm, this, no);
+  }
+};
+
+LineWidget.prototype.changed = function () {
+    var this$1 = this;
+
+  var oldH = this.height, cm = this.doc.cm, line = this.line;
+  this.height = null;
+  var diff = widgetHeight(this) - oldH;
+  if (!diff) { return }
+  updateLineHeight(line, line.height + diff);
+  if (cm) {
+    runInOp(cm, function () {
+      cm.curOp.forceUpdate = true;
+      adjustScrollWhenAboveVisible(cm, line, diff);
+      signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line));
+    });
+  }
+};
+eventMixin(LineWidget);
+
+function adjustScrollWhenAboveVisible(cm, line, diff) {
+  if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
+    { addToScrollTop(cm, diff); }
+}
+
+function addLineWidget(doc, handle, node, options) {
+  var widget = new LineWidget(doc, node, options);
+  var cm = doc.cm;
+  if (cm && widget.noHScroll) { cm.display.alignWidgets = true; }
+  changeLine(doc, handle, "widget", function (line) {
+    var widgets = line.widgets || (line.widgets = []);
+    if (widget.insertAt == null) { widgets.push(widget); }
+    else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget); }
+    widget.line = line;
+    if (cm && !lineIsHidden(doc, line)) {
+      var aboveVisible = heightAtLine(line) < doc.scrollTop;
+      updateLineHeight(line, line.height + widgetHeight(widget));
+      if (aboveVisible) { addToScrollTop(cm, widget.height); }
+      cm.curOp.forceUpdate = true;
+    }
+    return true
+  });
+  signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle));
+  return widget
+}
+
+// TEXTMARKERS
+
+// Created with markText and setBookmark methods. A TextMarker is a
+// handle that can be used to clear or find a marked position in the
+// document. Line objects hold arrays (markedSpans) containing
+// {from, to, marker} object pointing to such marker objects, and
+// indicating that such a marker is present on that line. Multiple
+// lines may point to the same marker when it spans across lines.
+// The spans will have null for their from/to properties when the
+// marker continues beyond the start/end of the line. Markers have
+// links back to the lines they currently touch.
+
+// Collapsed markers have unique ids, in order to be able to order
+// them, which is needed for uniquely determining an outer marker
+// when they overlap (they may nest, but not partially overlap).
+var nextMarkerId = 0;
+
+var TextMarker = function(doc, type) {
+  this.lines = [];
+  this.type = type;
+  this.doc = doc;
+  this.id = ++nextMarkerId;
+};
+
+// Clear the marker.
+TextMarker.prototype.clear = function () {
+    var this$1 = this;
+
+  if (this.explicitlyCleared) { return }
+  var cm = this.doc.cm, withOp = cm && !cm.curOp;
+  if (withOp) { startOperation(cm); }
+  if (hasHandler(this, "clear")) {
+    var found = this.find();
+    if (found) { signalLater(this, "clear", found.from, found.to); }
+  }
+  var min = null, max = null;
+  for (var i = 0; i < this.lines.length; ++i) {
+    var line = this$1.lines[i];
+    var span = getMarkedSpanFor(line.markedSpans, this$1);
+    if (cm && !this$1.collapsed) { regLineChange(cm, lineNo(line), "text"); }
+    else if (cm) {
+      if (span.to != null) { max = lineNo(line); }
+      if (span.from != null) { min = lineNo(line); }
+    }
+    line.markedSpans = removeMarkedSpan(line.markedSpans, span);
+    if (span.from == null && this$1.collapsed && !lineIsHidden(this$1.doc, line) && cm)
+      { updateLineHeight(line, textHeight(cm.display)); }
+  }
+  if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
+    var visual = visualLine(this$1.lines[i$1]), len = lineLength(visual);
+    if (len > cm.display.maxLineLength) {
+      cm.display.maxLine = visual;
+      cm.display.maxLineLength = len;
+      cm.display.maxLineChanged = true;
+    }
+  } }
+
+  if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1); }
+  this.lines.length = 0;
+  this.explicitlyCleared = true;
+  if (this.atomic && this.doc.cantEdit) {
+    this.doc.cantEdit = false;
+    if (cm) { reCheckSelection(cm.doc); }
+  }
+  if (cm) { signalLater(cm, "markerCleared", cm, this, min, max); }
+  if (withOp) { endOperation(cm); }
+  if (this.parent) { this.parent.clear(); }
+};
+
+// Find the position of the marker in the document. Returns a {from,
+// to} object by default. Side can be passed to get a specific side
+// -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
+// Pos objects returned contain a line object, rather than a line
+// number (used to prevent looking up the same line twice).
+TextMarker.prototype.find = function (side, lineObj) {
+    var this$1 = this;
+
+  if (side == null && this.type == "bookmark") { side = 1; }
+  var from, to;
+  for (var i = 0; i < this.lines.length; ++i) {
+    var line = this$1.lines[i];
+    var span = getMarkedSpanFor(line.markedSpans, this$1);
+    if (span.from != null) {
+      from = Pos(lineObj ? line : lineNo(line), span.from);
+      if (side == -1) { return from }
+    }
+    if (span.to != null) {
+      to = Pos(lineObj ? line : lineNo(line), span.to);
+      if (side == 1) { return to }
+    }
+  }
+  return from && {from: from, to: to}
+};
+
+// Signals that the marker's widget changed, and surrounding layout
+// should be recomputed.
+TextMarker.prototype.changed = function () {
+    var this$1 = this;
+
+  var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
+  if (!pos || !cm) { return }
+  runInOp(cm, function () {
+    var line = pos.line, lineN = lineNo(pos.line);
+    var view = findViewForLine(cm, lineN);
+    if (view) {
+      clearLineMeasurementCacheFor(view);
+      cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
+    }
+    cm.curOp.updateMaxLine = true;
+    if (!lineIsHidden(widget.doc, line) && widget.height != null) {
+      var oldHeight = widget.height;
+      widget.height = null;
+      var dHeight = widgetHeight(widget) - oldHeight;
+      if (dHeight)
+        { updateLineHeight(line, line.height + dHeight); }
+    }
+    signalLater(cm, "markerChanged", cm, this$1);
+  });
+};
+
+TextMarker.prototype.attachLine = function (line) {
+  if (!this.lines.length && this.doc.cm) {
+    var op = this.doc.cm.curOp;
+    if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
+      { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); }
+  }
+  this.lines.push(line);
+};
+
+TextMarker.prototype.detachLine = function (line) {
+  this.lines.splice(indexOf(this.lines, line), 1);
+  if (!this.lines.length && this.doc.cm) {
+    var op = this.doc.cm.curOp;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
+  }
+};
+eventMixin(TextMarker);
+
+// Create a marker, wire it up to the right lines, and
+function markText(doc, from, to, options, type) {
+  // Shared markers (across linked documents) are handled separately
+  // (markTextShared will call out to this again, once per
+  // document).
+  if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
+  // Ensure we are in an operation.
+  if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }
+
+  var marker = new TextMarker(doc, type), diff = cmp(from, to);
+  if (options) { copyObj(options, marker, false); }
+  // Don't connect empty markers unless clearWhenEmpty is false
+  if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
+    { return marker }
+  if (marker.replacedWith) {
+    // Showing up as a widget implies collapsed (widget replaces text)
+    marker.collapsed = true;
+    marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget");
+    if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true"); }
+    if (options.insertLeft) { marker.widgetNode.insertLeft = true; }
+  }
+  if (marker.collapsed) {
+    if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
+        from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
+      { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
+    seeCollapsedSpans();
+  }
+
+  if (marker.addToHistory)
+    { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN); }
+
+  var curLine = from.line, cm = doc.cm, updateMaxLine;
+  doc.iter(curLine, to.line + 1, function (line) {
+    if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
+      { updateMaxLine = true; }
+    if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0); }
+    addMarkedSpan(line, new MarkedSpan(marker,
+                                       curLine == from.line ? from.ch : null,
+                                       curLine == to.line ? to.ch : null));
+    ++curLine;
+  });
+  // lineIsHidden depends on the presence of the spans, so needs a second pass
+  if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
+    if (lineIsHidden(doc, line)) { updateLineHeight(line, 0); }
+  }); }
+
+  if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }); }
+
+  if (marker.readOnly) {
+    seeReadOnlySpans();
+    if (doc.history.done.length || doc.history.undone.length)
+      { doc.clearHistory(); }
+  }
+  if (marker.collapsed) {
+    marker.id = ++nextMarkerId;
+    marker.atomic = true;
+  }
+  if (cm) {
+    // Sync editor state
+    if (updateMaxLine) { cm.curOp.updateMaxLine = true; }
+    if (marker.collapsed)
+      { regChange(cm, from.line, to.line + 1); }
+    else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
+      { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text"); } }
+    if (marker.atomic) { reCheckSelection(cm.doc); }
+    signalLater(cm, "markerAdded", cm, marker);
+  }
+  return marker
+}
+
+// SHARED TEXTMARKERS
+
+// A shared marker spans multiple linked documents. It is
+// implemented as a meta-marker-object controlling multiple normal
+// markers.
+var SharedTextMarker = function(markers, primary) {
+  var this$1 = this;
+
+  this.markers = markers;
+  this.primary = primary;
+  for (var i = 0; i < markers.length; ++i)
+    { markers[i].parent = this$1; }
+};
+
+SharedTextMarker.prototype.clear = function () {
+    var this$1 = this;
+
+  if (this.explicitlyCleared) { return }
+  this.explicitlyCleared = true;
+  for (var i = 0; i < this.markers.length; ++i)
+    { this$1.markers[i].clear(); }
+  signalLater(this, "clear");
+};
+
+SharedTextMarker.prototype.find = function (side, lineObj) {
+  return this.primary.find(side, lineObj)
+};
+eventMixin(SharedTextMarker);
+
+function markTextShared(doc, from, to, options, type) {
+  options = copyObj(options);
+  options.shared = false;
+  var markers = [markText(doc, from, to, options, type)], primary = markers[0];
+  var widget = options.widgetNode;
+  linkedDocs(doc, function (doc) {
+    if (widget) { options.widgetNode = widget.cloneNode(true); }
+    markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
+    for (var i = 0; i < doc.linked.length; ++i)
+      { if (doc.linked[i].isParent) { return } }
+    primary = lst(markers);
+  });
+  return new SharedTextMarker(markers, primary)
+}
+
+function findSharedMarkers(doc) {
+  return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
+}
+
+function copySharedMarkers(doc, markers) {
+  for (var i = 0; i < markers.length; i++) {
+    var marker = markers[i], pos = marker.find();
+    var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
+    if (cmp(mFrom, mTo)) {
+      var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
+      marker.markers.push(subMark);
+      subMark.parent = marker;
+    }
+  }
+}
+
+function detachSharedMarkers(markers) {
+  var loop = function ( i ) {
+    var marker = markers[i], linked = [marker.primary.doc];
+    linkedDocs(marker.primary.doc, function (d) { return linked.push(d); });
+    for (var j = 0; j < marker.markers.length; j++) {
+      var subMarker = marker.markers[j];
+      if (indexOf(linked, subMarker.doc) == -1) {
+        subMarker.parent = null;
+        marker.markers.splice(j--, 1);
+      }
+    }
+  };
+
+  for (var i = 0; i < markers.length; i++) loop( i );
+}
+
+var nextDocId = 0;
+var Doc = function(text, mode, firstLine, lineSep, direction) {
+  if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
+  if (firstLine == null) { firstLine = 0; }
+
+  BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
+  this.first = firstLine;
+  this.scrollTop = this.scrollLeft = 0;
+  this.cantEdit = false;
+  this.cleanGeneration = 1;
+  this.modeFrontier = this.highlightFrontier = firstLine;
+  var start = Pos(firstLine, 0);
+  this.sel = simpleSelection(start);
+  this.history = new History(null);
+  this.id = ++nextDocId;
+  this.modeOption = mode;
+  this.lineSep = lineSep;
+  this.direction = (direction == "rtl") ? "rtl" : "ltr";
+  this.extend = false;
+
+  if (typeof text == "string") { text = this.splitLines(text); }
+  updateDoc(this, {from: start, to: start, text: text});
+  setSelection(this, simpleSelection(start), sel_dontScroll);
+};
+
+Doc.prototype = createObj(BranchChunk.prototype, {
+  constructor: Doc,
+  // Iterate over the document. Supports two forms -- with only one
+  // argument, it calls that for each line in the document. With
+  // three, it iterates over the range given by the first two (with
+  // the second being non-inclusive).
+  iter: function(from, to, op) {
+    if (op) { this.iterN(from - this.first, to - from, op); }
+    else { this.iterN(this.first, this.first + this.size, from); }
+  },
+
+  // Non-public interface for adding and removing lines.
+  insert: function(at, lines) {
+    var height = 0;
+    for (var i = 0; i < lines.length; ++i) { height += lines[i].height; }
+    this.insertInner(at - this.first, lines, height);
+  },
+  remove: function(at, n) { this.removeInner(at - this.first, n); },
+
+  // From here, the methods are part of the public interface. Most
+  // are also available from CodeMirror (editor) instances.
+
+  getValue: function(lineSep) {
+    var lines = getLines(this, this.first, this.first + this.size);
+    if (lineSep === false) { return lines }
+    return lines.join(lineSep || this.lineSeparator())
+  },
+  setValue: docMethodOp(function(code) {
+    var top = Pos(this.first, 0), last = this.first + this.size - 1;
+    makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
+                      text: this.splitLines(code), origin: "setValue", full: true}, true);
+    if (this.cm) { scrollToCoords(this.cm, 0, 0); }
+    setSelection(this, simpleSelection(top), sel_dontScroll);
+  }),
+  replaceRange: function(code, from, to, origin) {
+    from = clipPos(this, from);
+    to = to ? clipPos(this, to) : from;
+    replaceRange(this, code, from, to, origin);
+  },
+  getRange: function(from, to, lineSep) {
+    var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
+    if (lineSep === false) { return lines }
+    return lines.join(lineSep || this.lineSeparator())
+  },
+
+  getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},
+
+  getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
+  getLineNumber: function(line) {return lineNo(line)},
+
+  getLineHandleVisualStart: function(line) {
+    if (typeof line == "number") { line = getLine(this, line); }
+    return visualLine(line)
+  },
+
+  lineCount: function() {return this.size},
+  firstLine: function() {return this.first},
+  lastLine: function() {return this.first + this.size - 1},
+
+  clipPos: function(pos) {return clipPos(this, pos)},
+
+  getCursor: function(start) {
+    var range$$1 = this.sel.primary(), pos;
+    if (start == null || start == "head") { pos = range$$1.head; }
+    else if (start == "anchor") { pos = range$$1.anchor; }
+    else if (start == "end" || start == "to" || start === false) { pos = range$$1.to(); }
+    else { pos = range$$1.from(); }
+    return pos
+  },
+  listSelections: function() { return this.sel.ranges },
+  somethingSelected: function() {return this.sel.somethingSelected()},
+
+  setCursor: docMethodOp(function(line, ch, options) {
+    setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
+  }),
+  setSelection: docMethodOp(function(anchor, head, options) {
+    setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
+  }),
+  extendSelection: docMethodOp(function(head, other, options) {
+    extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
+  }),
+  extendSelections: docMethodOp(function(heads, options) {
+    extendSelections(this, clipPosArray(this, heads), options);
+  }),
+  extendSelectionsBy: docMethodOp(function(f, options) {
+    var heads = map(this.sel.ranges, f);
+    extendSelections(this, clipPosArray(this, heads), options);
+  }),
+  setSelections: docMethodOp(function(ranges, primary, options) {
+    var this$1 = this;
+
+    if (!ranges.length) { return }
+    var out = [];
+    for (var i = 0; i < ranges.length; i++)
+      { out[i] = new Range(clipPos(this$1, ranges[i].anchor),
+                         clipPos(this$1, ranges[i].head)); }
+    if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex); }
+    setSelection(this, normalizeSelection(out, primary), options);
+  }),
+  addSelection: docMethodOp(function(anchor, head, options) {
+    var ranges = this.sel.ranges.slice(0);
+    ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
+    setSelection(this, normalizeSelection(ranges, ranges.length - 1), options);
+  }),
+
+  getSelection: function(lineSep) {
+    var this$1 = this;
+
+    var ranges = this.sel.ranges, lines;
+    for (var i = 0; i < ranges.length; i++) {
+      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to());
+      lines = lines ? lines.concat(sel) : sel;
+    }
+    if (lineSep === false) { return lines }
+    else { return lines.join(lineSep || this.lineSeparator()) }
+  },
+  getSelections: function(lineSep) {
+    var this$1 = this;
+
+    var parts = [], ranges = this.sel.ranges;
+    for (var i = 0; i < ranges.length; i++) {
+      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to());
+      if (lineSep !== false) { sel = sel.join(lineSep || this$1.lineSeparator()); }
+      parts[i] = sel;
+    }
+    return parts
+  },
+  replaceSelection: function(code, collapse, origin) {
+    var dup = [];
+    for (var i = 0; i < this.sel.ranges.length; i++)
+      { dup[i] = code; }
+    this.replaceSelections(dup, collapse, origin || "+input");
+  },
+  replaceSelections: docMethodOp(function(code, collapse, origin) {
+    var this$1 = this;
+
+    var changes = [], sel = this.sel;
+    for (var i = 0; i < sel.ranges.length; i++) {
+      var range$$1 = sel.ranges[i];
+      changes[i] = {from: range$$1.from(), to: range$$1.to(), text: this$1.splitLines(code[i]), origin: origin};
+    }
+    var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
+    for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
+      { makeChange(this$1, changes[i$1]); }
+    if (newSel) { setSelectionReplaceHistory(this, newSel); }
+    else if (this.cm) { ensureCursorVisible(this.cm); }
+  }),
+  undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
+  redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
+  undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
+  redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),
+
+  setExtending: function(val) {this.extend = val;},
+  getExtending: function() {return this.extend},
+
+  historySize: function() {
+    var hist = this.history, done = 0, undone = 0;
+    for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done; } }
+    for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone; } }
+    return {undo: done, redo: undone}
+  },
+  clearHistory: function() {this.history = new History(this.history.maxGeneration);},
+
+  markClean: function() {
+    this.cleanGeneration = this.changeGeneration(true);
+  },
+  changeGeneration: function(forceSplit) {
+    if (forceSplit)
+      { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null; }
+    return this.history.generation
+  },
+  isClean: function (gen) {
+    return this.history.generation == (gen || this.cleanGeneration)
+  },
+
+  getHistory: function() {
+    return {done: copyHistoryArray(this.history.done),
+            undone: copyHistoryArray(this.history.undone)}
+  },
+  setHistory: function(histData) {
+    var hist = this.history = new History(this.history.maxGeneration);
+    hist.done = copyHistoryArray(histData.done.slice(0), null, true);
+    hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
+  },
+
+  setGutterMarker: docMethodOp(function(line, gutterID, value) {
+    return changeLine(this, line, "gutter", function (line) {
+      var markers = line.gutterMarkers || (line.gutterMarkers = {});
+      markers[gutterID] = value;
+      if (!value && isEmpty(markers)) { line.gutterMarkers = null; }
+      return true
+    })
+  }),
+
+  clearGutter: docMethodOp(function(gutterID) {
+    var this$1 = this;
+
+    this.iter(function (line) {
+      if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
+        changeLine(this$1, line, "gutter", function () {
+          line.gutterMarkers[gutterID] = null;
+          if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null; }
+          return true
+        });
+      }
+    });
+  }),
+
+  lineInfo: function(line) {
+    var n;
+    if (typeof line == "number") {
+      if (!isLine(this, line)) { return null }
+      n = line;
+      line = getLine(this, line);
+      if (!line) { return null }
+    } else {
+      n = lineNo(line);
+      if (n == null) { return null }
+    }
+    return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
+            textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
+            widgets: line.widgets}
+  },
+
+  addLineClass: docMethodOp(function(handle, where, cls) {
+    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+      var prop = where == "text" ? "textClass"
+               : where == "background" ? "bgClass"
+               : where == "gutter" ? "gutterClass" : "wrapClass";
+      if (!line[prop]) { line[prop] = cls; }
+      else if (classTest(cls).test(line[prop])) { return false }
+      else { line[prop] += " " + cls; }
+      return true
+    })
+  }),
+  removeLineClass: docMethodOp(function(handle, where, cls) {
+    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+      var prop = where == "text" ? "textClass"
+               : where == "background" ? "bgClass"
+               : where == "gutter" ? "gutterClass" : "wrapClass";
+      var cur = line[prop];
+      if (!cur) { return false }
+      else if (cls == null) { line[prop] = null; }
+      else {
+        var found = cur.match(classTest(cls));
+        if (!found) { return false }
+        var end = found.index + found[0].length;
+        line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
+      }
+      return true
+    })
+  }),
+
+  addLineWidget: docMethodOp(function(handle, node, options) {
+    return addLineWidget(this, handle, node, options)
+  }),
+  removeLineWidget: function(widget) { widget.clear(); },
+
+  markText: function(from, to, options) {
+    return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
+  },
+  setBookmark: function(pos, options) {
+    var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
+                    insertLeft: options && options.insertLeft,
+                    clearWhenEmpty: false, shared: options && options.shared,
+                    handleMouseEvents: options && options.handleMouseEvents};
+    pos = clipPos(this, pos);
+    return markText(this, pos, pos, realOpts, "bookmark")
+  },
+  findMarksAt: function(pos) {
+    pos = clipPos(this, pos);
+    var markers = [], spans = getLine(this, pos.line).markedSpans;
+    if (spans) { for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i];
+      if ((span.from == null || span.from <= pos.ch) &&
+          (span.to == null || span.to >= pos.ch))
+        { markers.push(span.marker.parent || span.marker); }
+    } }
+    return markers
+  },
+  findMarks: function(from, to, filter) {
+    from = clipPos(this, from); to = clipPos(this, to);
+    var found = [], lineNo$$1 = from.line;
+    this.iter(from.line, to.line + 1, function (line) {
+      var spans = line.markedSpans;
+      if (spans) { for (var i = 0; i < spans.length; i++) {
+        var span = spans[i];
+        if (!(span.to != null && lineNo$$1 == from.line && from.ch >= span.to ||
+              span.from == null && lineNo$$1 != from.line ||
+              span.from != null && lineNo$$1 == to.line && span.from >= to.ch) &&
+            (!filter || filter(span.marker)))
+          { found.push(span.marker.parent || span.marker); }
+      } }
+      ++lineNo$$1;
+    });
+    return found
+  },
+  getAllMarks: function() {
+    var markers = [];
+    this.iter(function (line) {
+      var sps = line.markedSpans;
+      if (sps) { for (var i = 0; i < sps.length; ++i)
+        { if (sps[i].from != null) { markers.push(sps[i].marker); } } }
+    });
+    return markers
+  },
+
+  posFromIndex: function(off) {
+    var ch, lineNo$$1 = this.first, sepSize = this.lineSeparator().length;
+    this.iter(function (line) {
+      var sz = line.text.length + sepSize;
+      if (sz > off) { ch = off; return true }
+      off -= sz;
+      ++lineNo$$1;
+    });
+    return clipPos(this, Pos(lineNo$$1, ch))
+  },
+  indexFromPos: function (coords) {
+    coords = clipPos(this, coords);
+    var index = coords.ch;
+    if (coords.line < this.first || coords.ch < 0) { return 0 }
+    var sepSize = this.lineSeparator().length;
+    this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
+      index += line.text.length + sepSize;
+    });
+    return index
+  },
+
+  copy: function(copyHistory) {
+    var doc = new Doc(getLines(this, this.first, this.first + this.size),
+                      this.modeOption, this.first, this.lineSep, this.direction);
+    doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
+    doc.sel = this.sel;
+    doc.extend = false;
+    if (copyHistory) {
+      doc.history.undoDepth = this.history.undoDepth;
+      doc.setHistory(this.getHistory());
+    }
+    return doc
+  },
+
+  linkedDoc: function(options) {
+    if (!options) { options = {}; }
+    var from = this.first, to = this.first + this.size;
+    if (options.from != null && options.from > from) { from = options.from; }
+    if (options.to != null && options.to < to) { to = options.to; }
+    var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction);
+    if (options.sharedHist) { copy.history = this.history
+    ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
+    copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
+    copySharedMarkers(copy, findSharedMarkers(this));
+    return copy
+  },
+  unlinkDoc: function(other) {
+    var this$1 = this;
+
+    if (other instanceof CodeMirror$1) { other = other.doc; }
+    if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
+      var link = this$1.linked[i];
+      if (link.doc != other) { continue }
+      this$1.linked.splice(i, 1);
+      other.unlinkDoc(this$1);
+      detachSharedMarkers(findSharedMarkers(this$1));
+      break
+    } }
+    // If the histories were shared, split them again
+    if (other.history == this.history) {
+      var splitIds = [other.id];
+      linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true);
+      other.history = new History(null);
+      other.history.done = copyHistoryArray(this.history.done, splitIds);
+      other.history.undone = copyHistoryArray(this.history.undone, splitIds);
+    }
+  },
+  iterLinkedDocs: function(f) {linkedDocs(this, f);},
+
+  getMode: function() {return this.mode},
+  getEditor: function() {return this.cm},
+
+  splitLines: function(str) {
+    if (this.lineSep) { return str.split(this.lineSep) }
+    return splitLinesAuto(str)
+  },
+  lineSeparator: function() { return this.lineSep || "\n" },
+
+  setDirection: docMethodOp(function (dir) {
+    if (dir != "rtl") { dir = "ltr"; }
+    if (dir == this.direction) { return }
+    this.direction = dir;
+    this.iter(function (line) { return line.order = null; });
+    if (this.cm) { directionChanged(this.cm); }
+  })
+});
+
+// Public alias.
+Doc.prototype.eachLine = Doc.prototype.iter;
+
+// Kludge to work around strange IE behavior where it'll sometimes
+// re-fire a series of drag-related events right after the drop (#1551)
+var lastDrop = 0;
+
+function onDrop(e) {
+  var cm = this;
+  clearDragCursor(cm);
+  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
+    { return }
+  e_preventDefault(e);
+  if (ie) { lastDrop = +new Date; }
+  var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
+  if (!pos || cm.isReadOnly()) { return }
+  // Might be a file drop, in which case we simply extract the text
+  // and insert it.
+  if (files && files.length && window.FileReader && window.File) {
+    var n = files.length, text = Array(n), read = 0;
+    var loadFile = function (file, i) {
+      if (cm.options.allowDropFileTypes &&
+          indexOf(cm.options.allowDropFileTypes, file.type) == -1)
+        { return }
+
+      var reader = new FileReader;
+      reader.onload = operation(cm, function () {
+        var content = reader.result;
+        if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) { content = ""; }
+        text[i] = content;
+        if (++read == n) {
+          pos = clipPos(cm.doc, pos);
+          var change = {from: pos, to: pos,
+                        text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
+                        origin: "paste"};
+          makeChange(cm.doc, change);
+          setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)));
+        }
+      });
+      reader.readAsText(file);
+    };
+    for (var i = 0; i < n; ++i) { loadFile(files[i], i); }
+  } else { // Normal drop
+    // Don't do a replace if the drop happened inside of the selected text.
+    if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
+      cm.state.draggingText(e);
+      // Ensure the editor is re-focused
+      setTimeout(function () { return cm.display.input.focus(); }, 20);
+      return
+    }
+    try {
+      var text$1 = e.dataTransfer.getData("Text");
+      if (text$1) {
+        var selected;
+        if (cm.state.draggingText && !cm.state.draggingText.copy)
+          { selected = cm.listSelections(); }
+        setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
+        if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
+          { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag"); } }
+        cm.replaceSelection(text$1, "around", "paste");
+        cm.display.input.focus();
+      }
+    }
+    catch(e){}
+  }
+}
+
+function onDragStart(cm, e) {
+  if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
+  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }
+
+  e.dataTransfer.setData("Text", cm.getSelection());
+  e.dataTransfer.effectAllowed = "copyMove";
+
+  // Use dummy image instead of default browsers image.
+  // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
+  if (e.dataTransfer.setDragImage && !safari) {
+    var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
+    img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
+    if (presto) {
+      img.width = img.height = 1;
+      cm.display.wrapper.appendChild(img);
+      // Force a relayout, or Opera won't use our image for some obscure reason
+      img._top = img.offsetTop;
+    }
+    e.dataTransfer.setDragImage(img, 0, 0);
+    if (presto) { img.parentNode.removeChild(img); }
+  }
+}
+
+function onDragOver(cm, e) {
+  var pos = posFromMouse(cm, e);
+  if (!pos) { return }
+  var frag = document.createDocumentFragment();
+  drawSelectionCursor(cm, pos, frag);
+  if (!cm.display.dragCursor) {
+    cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
+    cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
+  }
+  removeChildrenAndAdd(cm.display.dragCursor, frag);
+}
+
+function clearDragCursor(cm) {
+  if (cm.display.dragCursor) {
+    cm.display.lineSpace.removeChild(cm.display.dragCursor);
+    cm.display.dragCursor = null;
+  }
+}
+
+// These must be handled carefully, because naively registering a
+// handler for each editor will cause the editors to never be
+// garbage collected.
+
+function forEachCodeMirror(f) {
+  if (!document.getElementsByClassName) { return }
+  var byClass = document.getElementsByClassName("CodeMirror");
+  for (var i = 0; i < byClass.length; i++) {
+    var cm = byClass[i].CodeMirror;
+    if (cm) { f(cm); }
+  }
+}
+
+var globalsRegistered = false;
+function ensureGlobalHandlers() {
+  if (globalsRegistered) { return }
+  registerGlobalHandlers();
+  globalsRegistered = true;
+}
+function registerGlobalHandlers() {
+  // When the window resizes, we need to refresh active editors.
+  var resizeTimer;
+  on(window, "resize", function () {
+    if (resizeTimer == null) { resizeTimer = setTimeout(function () {
+      resizeTimer = null;
+      forEachCodeMirror(onResize);
+    }, 100); }
+  });
+  // When the window loses focus, we want to show the editor as blurred
+  on(window, "blur", function () { return forEachCodeMirror(onBlur); });
+}
+// Called when the window resizes
+function onResize(cm) {
+  var d = cm.display;
+  if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
+    { return }
+  // Might be a text scaling operation, clear size caches.
+  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
+  d.scrollbarsClipped = false;
+  cm.setSize();
+}
+
+var keyNames = {
+  3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
+  19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
+  36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
+  46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
+  106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
+  173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+  221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+  63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
+};
+
+// Number keys
+for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i); }
+// Alphabetic keys
+for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1); }
+// Function keys
+for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2; }
+
+var keyMap = {};
+
+keyMap.basic = {
+  "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
+  "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
+  "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
+  "Tab": "defaultTab", "Shift-Tab": "indentAuto",
+  "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
+  "Esc": "singleSelection"
+};
+// Note that the save and find-related commands aren't defined by
+// default. User code or addons can define them. Unknown commands
+// are simply ignored.
+keyMap.pcDefault = {
+  "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
+  "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
+  "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
+  "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
+  "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
+  "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
+  "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
+  fallthrough: "basic"
+};
+// Very basic readline/emacs-style bindings, which are standard on Mac.
+keyMap.emacsy = {
+  "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
+  "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
+  "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
+  "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
+  "Ctrl-O": "openLine"
+};
+keyMap.macDefault = {
+  "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+  "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+  "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
+  "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
+  "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
+  "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
+  "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
+  fallthrough: ["basic", "emacsy"]
+};
+keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
+
+// KEYMAP DISPATCH
+
+function normalizeKeyName(name) {
+  var parts = name.split(/-(?!$)/);
+  name = parts[parts.length - 1];
+  var alt, ctrl, shift, cmd;
+  for (var i = 0; i < parts.length - 1; i++) {
+    var mod = parts[i];
+    if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true; }
+    else if (/^a(lt)?$/i.test(mod)) { alt = true; }
+    else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true; }
+    else if (/^s(hift)?$/i.test(mod)) { shift = true; }
+    else { throw new Error("Unrecognized modifier name: " + mod) }
+  }
+  if (alt) { name = "Alt-" + name; }
+  if (ctrl) { name = "Ctrl-" + name; }
+  if (cmd) { name = "Cmd-" + name; }
+  if (shift) { name = "Shift-" + name; }
+  return name
+}
+
+// This is a kludge to keep keymaps mostly working as raw objects
+// (backwards compatibility) while at the same time support features
+// like normalization and multi-stroke key bindings. It compiles a
+// new normalized keymap, and then updates the old object to reflect
+// this.
+function normalizeKeyMap(keymap) {
+  var copy = {};
+  for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
+    var value = keymap[keyname];
+    if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
+    if (value == "...") { delete keymap[keyname]; continue }
+
+    var keys = map(keyname.split(" "), normalizeKeyName);
+    for (var i = 0; i < keys.length; i++) {
+      var val = (void 0), name = (void 0);
+      if (i == keys.length - 1) {
+        name = keys.join(" ");
+        val = value;
+      } else {
+        name = keys.slice(0, i + 1).join(" ");
+        val = "...";
+      }
+      var prev = copy[name];
+      if (!prev) { copy[name] = val; }
+      else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
+    }
+    delete keymap[keyname];
+  } }
+  for (var prop in copy) { keymap[prop] = copy[prop]; }
+  return keymap
+}
+
+function lookupKey(key, map$$1, handle, context) {
+  map$$1 = getKeyMap(map$$1);
+  var found = map$$1.call ? map$$1.call(key, context) : map$$1[key];
+  if (found === false) { return "nothing" }
+  if (found === "...") { return "multi" }
+  if (found != null && handle(found)) { return "handled" }
+
+  if (map$$1.fallthrough) {
+    if (Object.prototype.toString.call(map$$1.fallthrough) != "[object Array]")
+      { return lookupKey(key, map$$1.fallthrough, handle, context) }
+    for (var i = 0; i < map$$1.fallthrough.length; i++) {
+      var result = lookupKey(key, map$$1.fallthrough[i], handle, context);
+      if (result) { return result }
+    }
+  }
+}
+
+// Modifier key presses don't count as 'real' key presses for the
+// purpose of keymap fallthrough.
+function isModifierKey(value) {
+  var name = typeof value == "string" ? value : keyNames[value.keyCode];
+  return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
+}
+
+function addModifierNames(name, event, noShift) {
+  var base = name;
+  if (event.altKey && base != "Alt") { name = "Alt-" + name; }
+  if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name; }
+  if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") { name = "Cmd-" + name; }
+  if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name; }
+  return name
+}
+
+// Look up the name of a key as indicated by an event object.
+function keyName(event, noShift) {
+  if (presto && event.keyCode == 34 && event["char"]) { return false }
+  var name = keyNames[event.keyCode];
+  if (name == null || event.altGraphKey) { return false }
+  return addModifierNames(name, event, noShift)
+}
+
+function getKeyMap(val) {
+  return typeof val == "string" ? keyMap[val] : val
+}
+
+// Helper for deleting text near the selection(s), used to implement
+// backspace, delete, and similar functionality.
+function deleteNearSelection(cm, compute) {
+  var ranges = cm.doc.sel.ranges, kill = [];
+  // Build up a set of ranges to kill first, merging overlapping
+  // ranges.
+  for (var i = 0; i < ranges.length; i++) {
+    var toKill = compute(ranges[i]);
+    while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
+      var replaced = kill.pop();
+      if (cmp(replaced.from, toKill.from) < 0) {
+        toKill.from = replaced.from;
+        break
+      }
+    }
+    kill.push(toKill);
+  }
+  // Next, remove those actual ranges.
+  runInOp(cm, function () {
+    for (var i = kill.length - 1; i >= 0; i--)
+      { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete"); }
+    ensureCursorVisible(cm);
+  });
+}
+
+function moveCharLogically(line, ch, dir) {
+  var target = skipExtendingChars(line.text, ch + dir, dir);
+  return target < 0 || target > line.text.length ? null : target
+}
+
+function moveLogically(line, start, dir) {
+  var ch = moveCharLogically(line, start.ch, dir);
+  return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
+}
+
+function endOfLine(visually, cm, lineObj, lineNo, dir) {
+  if (visually) {
+    var order = getOrder(lineObj, cm.doc.direction);
+    if (order) {
+      var part = dir < 0 ? lst(order) : order[0];
+      var moveInStorageOrder = (dir < 0) == (part.level == 1);
+      var sticky = moveInStorageOrder ? "after" : "before";
+      var ch;
+      // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
+      // it could be that the last bidi part is not on the last visual line,
+      // since visual lines contain content order-consecutive chunks.
+      // Thus, in rtl, we are looking for the first (content-order) character
+      // in the rtl chunk that is on the last line (that is, the same line
+      // as the last (content-order) character).
+      if (part.level > 0 || cm.doc.direction == "rtl") {
+        var prep = prepareMeasureForLine(cm, lineObj);
+        ch = dir < 0 ? lineObj.text.length - 1 : 0;
+        var targetTop = measureCharPrepared(cm, prep, ch).top;
+        ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch);
+        if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1); }
+      } else { ch = dir < 0 ? part.to : part.from; }
+      return new Pos(lineNo, ch, sticky)
+    }
+  }
+  return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
+}
+
+function moveVisually(cm, line, start, dir) {
+  var bidi = getOrder(line, cm.doc.direction);
+  if (!bidi) { return moveLogically(line, start, dir) }
+  if (start.ch >= line.text.length) {
+    start.ch = line.text.length;
+    start.sticky = "before";
+  } else if (start.ch <= 0) {
+    start.ch = 0;
+    start.sticky = "after";
+  }
+  var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos];
+  if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
+    // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
+    // nothing interesting happens.
+    return moveLogically(line, start, dir)
+  }
+
+  var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); };
+  var prep;
+  var getWrappedLineExtent = function (ch) {
+    if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
+    prep = prep || prepareMeasureForLine(cm, line);
+    return wrappedLineExtentChar(cm, line, prep, ch)
+  };
+  var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch);
+
+  if (cm.doc.direction == "rtl" || part.level == 1) {
+    var moveInStorageOrder = (part.level == 1) == (dir < 0);
+    var ch = mv(start, moveInStorageOrder ? 1 : -1);
+    if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
+      // Case 2: We move within an rtl part or in an rtl editor on the same visual line
+      var sticky = moveInStorageOrder ? "before" : "after";
+      return new Pos(start.line, ch, sticky)
+    }
+  }
+
+  // Case 3: Could not move within this bidi part in this visual line, so leave
+  // the current bidi part
+
+  var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
+    var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
+      ? new Pos(start.line, mv(ch, 1), "before")
+      : new Pos(start.line, ch, "after"); };
+
+    for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
+      var part = bidi[partPos];
+      var moveInStorageOrder = (dir > 0) == (part.level != 1);
+      var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1);
+      if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
+      ch = moveInStorageOrder ? part.from : mv(part.to, -1);
+      if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
+    }
+  };
+
+  // Case 3a: Look for other bidi parts on the same visual line
+  var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent);
+  if (res) { return res }
+
+  // Case 3b: Look for other bidi parts on the next visual line
+  var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1);
+  if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
+    res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh));
+    if (res) { return res }
+  }
+
+  // Case 4: Nowhere to move
+  return null
+}
+
+// Commands are parameter-less actions that can be performed on an
+// editor, mostly used for keybindings.
+var commands = {
+  selectAll: selectAll,
+  singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
+  killLine: function (cm) { return deleteNearSelection(cm, function (range) {
+    if (range.empty()) {
+      var len = getLine(cm.doc, range.head.line).text.length;
+      if (range.head.ch == len && range.head.line < cm.lastLine())
+        { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
+      else
+        { return {from: range.head, to: Pos(range.head.line, len)} }
+    } else {
+      return {from: range.from(), to: range.to()}
+    }
+  }); },
+  deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+    from: Pos(range.from().line, 0),
+    to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
+  }); }); },
+  delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+    from: Pos(range.from().line, 0), to: range.from()
+  }); }); },
+  delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
+    var top = cm.charCoords(range.head, "div").top + 5;
+    var leftPos = cm.coordsChar({left: 0, top: top}, "div");
+    return {from: leftPos, to: range.from()}
+  }); },
+  delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
+    var top = cm.charCoords(range.head, "div").top + 5;
+    var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
+    return {from: range.from(), to: rightPos }
+  }); },
+  undo: function (cm) { return cm.undo(); },
+  redo: function (cm) { return cm.redo(); },
+  undoSelection: function (cm) { return cm.undoSelection(); },
+  redoSelection: function (cm) { return cm.redoSelection(); },
+  goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
+  goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
+  goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
+    {origin: "+move", bias: 1}
+  ); },
+  goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
+    {origin: "+move", bias: 1}
+  ); },
+  goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
+    {origin: "+move", bias: -1}
+  ); },
+  goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
+    var top = cm.cursorCoords(range.head, "div").top + 5;
+    return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
+  }, sel_move); },
+  goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
+    var top = cm.cursorCoords(range.head, "div").top + 5;
+    return cm.coordsChar({left: 0, top: top}, "div")
+  }, sel_move); },
+  goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
+    var top = cm.cursorCoords(range.head, "div").top + 5;
+    var pos = cm.coordsChar({left: 0, top: top}, "div");
+    if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
+    return pos
+  }, sel_move); },
+  goLineUp: function (cm) { return cm.moveV(-1, "line"); },
+  goLineDown: function (cm) { return cm.moveV(1, "line"); },
+  goPageUp: function (cm) { return cm.moveV(-1, "page"); },
+  goPageDown: function (cm) { return cm.moveV(1, "page"); },
+  goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
+  goCharRight: function (cm) { return cm.moveH(1, "char"); },
+  goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
+  goColumnRight: function (cm) { return cm.moveH(1, "column"); },
+  goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
+  goGroupRight: function (cm) { return cm.moveH(1, "group"); },
+  goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
+  goWordRight: function (cm) { return cm.moveH(1, "word"); },
+  delCharBefore: function (cm) { return cm.deleteH(-1, "char"); },
+  delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
+  delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
+  delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
+  delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
+  delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
+  indentAuto: function (cm) { return cm.indentSelection("smart"); },
+  indentMore: function (cm) { return cm.indentSelection("add"); },
+  indentLess: function (cm) { return cm.indentSelection("subtract"); },
+  insertTab: function (cm) { return cm.replaceSelection("\t"); },
+  insertSoftTab: function (cm) {
+    var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
+    for (var i = 0; i < ranges.length; i++) {
+      var pos = ranges[i].from();
+      var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
+      spaces.push(spaceStr(tabSize - col % tabSize));
+    }
+    cm.replaceSelections(spaces);
+  },
+  defaultTab: function (cm) {
+    if (cm.somethingSelected()) { cm.indentSelection("add"); }
+    else { cm.execCommand("insertTab"); }
+  },
+  // Swap the two chars left and right of each selection's head.
+  // Move cursor behind the two swapped characters afterwards.
+  //
+  // Doesn't consider line feeds a character.
+  // Doesn't scan more than one line above to find a character.
+  // Doesn't do anything on an empty line.
+  // Doesn't do anything with non-empty selections.
+  transposeChars: function (cm) { return runInOp(cm, function () {
+    var ranges = cm.listSelections(), newSel = [];
+    for (var i = 0; i < ranges.length; i++) {
+      if (!ranges[i].empty()) { continue }
+      var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
+      if (line) {
+        if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1); }
+        if (cur.ch > 0) {
+          cur = new Pos(cur.line, cur.ch + 1);
+          cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
+                          Pos(cur.line, cur.ch - 2), cur, "+transpose");
+        } else if (cur.line > cm.doc.first) {
+          var prev = getLine(cm.doc, cur.line - 1).text;
+          if (prev) {
+            cur = new Pos(cur.line, 1);
+            cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
+                            prev.charAt(prev.length - 1),
+                            Pos(cur.line - 1, prev.length - 1), cur, "+transpose");
+          }
+        }
+      }
+      newSel.push(new Range(cur, cur));
+    }
+    cm.setSelections(newSel);
+  }); },
+  newlineAndIndent: function (cm) { return runInOp(cm, function () {
+    var sels = cm.listSelections();
+    for (var i = sels.length - 1; i >= 0; i--)
+      { cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input"); }
+    sels = cm.listSelections();
+    for (var i$1 = 0; i$1 < sels.length; i$1++)
+      { cm.indentLine(sels[i$1].from().line, null, true); }
+    ensureCursorVisible(cm);
+  }); },
+  openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
+  toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
+};
+
+
+function lineStart(cm, lineN) {
+  var line = getLine(cm.doc, lineN);
+  var visual = visualLine(line);
+  if (visual != line) { lineN = lineNo(visual); }
+  return endOfLine(true, cm, visual, lineN, 1)
+}
+function lineEnd(cm, lineN) {
+  var line = getLine(cm.doc, lineN);
+  var visual = visualLineEnd(line);
+  if (visual != line) { lineN = lineNo(visual); }
+  return endOfLine(true, cm, line, lineN, -1)
+}
+function lineStartSmart(cm, pos) {
+  var start = lineStart(cm, pos.line);
+  var line = getLine(cm.doc, start.line);
+  var order = getOrder(line, cm.doc.direction);
+  if (!order || order[0].level == 0) {
+    var firstNonWS = Math.max(0, line.text.search(/\S/));
+    var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch;
+    return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)
+  }
+  return start
+}
+
+// Run a handler that was bound to a key.
+function doHandleBinding(cm, bound, dropShift) {
+  if (typeof bound == "string") {
+    bound = commands[bound];
+    if (!bound) { return false }
+  }
+  // Ensure previous input has been read, so that the handler sees a
+  // consistent view of the document
+  cm.display.input.ensurePolled();
+  var prevShift = cm.display.shift, done = false;
+  try {
+    if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
+    if (dropShift) { cm.display.shift = false; }
+    done = bound(cm) != Pass;
+  } finally {
+    cm.display.shift = prevShift;
+    cm.state.suppressEdits = false;
+  }
+  return done
+}
+
+function lookupKeyForEditor(cm, name, handle) {
+  for (var i = 0; i < cm.state.keyMaps.length; i++) {
+    var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
+    if (result) { return result }
+  }
+  return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
+    || lookupKey(name, cm.options.keyMap, handle, cm)
+}
+
+// Note that, despite the name, this function is also used to check
+// for bound mouse clicks.
+
+var stopSeq = new Delayed;
+function dispatchKey(cm, name, e, handle) {
+  var seq = cm.state.keySeq;
+  if (seq) {
+    if (isModifierKey(name)) { return "handled" }
+    stopSeq.set(50, function () {
+      if (cm.state.keySeq == seq) {
+        cm.state.keySeq = null;
+        cm.display.input.reset();
+      }
+    });
+    name = seq + " " + name;
+  }
+  var result = lookupKeyForEditor(cm, name, handle);
+
+  if (result == "multi")
+    { cm.state.keySeq = name; }
+  if (result == "handled")
+    { signalLater(cm, "keyHandled", cm, name, e); }
+
+  if (result == "handled" || result == "multi") {
+    e_preventDefault(e);
+    restartBlink(cm);
+  }
+
+  if (seq && !result && /\'$/.test(name)) {
+    e_preventDefault(e);
+    return true
+  }
+  return !!result
+}
+
+// Handle a key from the keydown event.
+function handleKeyBinding(cm, e) {
+  var name = keyName(e, true);
+  if (!name) { return false }
+
+  if (e.shiftKey && !cm.state.keySeq) {
+    // First try to resolve full name (including 'Shift-'). Failing
+    // that, see if there is a cursor-motion command (starting with
+    // 'go') bound to the keyname without 'Shift-'.
+    return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
+        || dispatchKey(cm, name, e, function (b) {
+             if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
+               { return doHandleBinding(cm, b) }
+           })
+  } else {
+    return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
+  }
+}
+
+// Handle a key from the keypress event
+function handleCharBinding(cm, e, ch) {
+  return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
+}
+
+var lastStoppedKey = null;
+function onKeyDown(e) {
+  var cm = this;
+  cm.curOp.focus = activeElt();
+  if (signalDOMEvent(cm, e)) { return }
+  // IE does strange things with escape.
+  if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false; }
+  var code = e.keyCode;
+  cm.display.shift = code == 16 || e.shiftKey;
+  var handled = handleKeyBinding(cm, e);
+  if (presto) {
+    lastStoppedKey = handled ? code : null;
+    // Opera has no cut event... we try to at least catch the key combo
+    if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
+      { cm.replaceSelection("", null, "cut"); }
+  }
+
+  // Turn mouse into crosshair when Alt is held on Mac.
+  if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
+    { showCrossHair(cm); }
+}
+
+function showCrossHair(cm) {
+  var lineDiv = cm.display.lineDiv;
+  addClass(lineDiv, "CodeMirror-crosshair");
+
+  function up(e) {
+    if (e.keyCode == 18 || !e.altKey) {
+      rmClass(lineDiv, "CodeMirror-crosshair");
+      off(document, "keyup", up);
+      off(document, "mouseover", up);
+    }
+  }
+  on(document, "keyup", up);
+  on(document, "mouseover", up);
+}
+
+function onKeyUp(e) {
+  if (e.keyCode == 16) { this.doc.sel.shift = false; }
+  signalDOMEvent(this, e);
+}
+
+function onKeyPress(e) {
+  var cm = this;
+  if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
+  var keyCode = e.keyCode, charCode = e.charCode;
+  if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
+  if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
+  var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
+  // Some browsers fire keypress events for backspace
+  if (ch == "\x08") { return }
+  if (handleCharBinding(cm, e, ch)) { return }
+  cm.display.input.onKeyPress(e);
+}
+
+var DOUBLECLICK_DELAY = 400;
+
+var PastClick = function(time, pos, button) {
+  this.time = time;
+  this.pos = pos;
+  this.button = button;
+};
+
+PastClick.prototype.compare = function (time, pos, button) {
+  return this.time + DOUBLECLICK_DELAY > time &&
+    cmp(pos, this.pos) == 0 && button == this.button
+};
+
+var lastClick;
+var lastDoubleClick;
+function clickRepeat(pos, button) {
+  var now = +new Date;
+  if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
+    lastClick = lastDoubleClick = null;
+    return "triple"
+  } else if (lastClick && lastClick.compare(now, pos, button)) {
+    lastDoubleClick = new PastClick(now, pos, button);
+    lastClick = null;
+    return "double"
+  } else {
+    lastClick = new PastClick(now, pos, button);
+    lastDoubleClick = null;
+    return "single"
+  }
+}
+
+// A mouse down can be a single click, double click, triple click,
+// start of selection drag, start of text drag, new cursor
+// (ctrl-click), rectangle drag (alt-drag), or xwin
+// middle-click-paste. Or it might be a click on something we should
+// not interfere with, such as a scrollbar or widget.
+function onMouseDown(e) {
+  var cm = this, display = cm.display;
+  if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
+  display.input.ensurePolled();
+  display.shift = e.shiftKey;
+
+  if (eventInWidget(display, e)) {
+    if (!webkit) {
+      // Briefly turn off draggability, to allow widgets to do
+      // normal dragging things.
+      display.scroller.draggable = false;
+      setTimeout(function () { return display.scroller.draggable = true; }, 100);
+    }
+    return
+  }
+  if (clickInGutter(cm, e)) { return }
+  var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single";
+  window.focus();
+
+  // #3261: make sure, that we're not starting a second selection
+  if (button == 1 && cm.state.selectingText)
+    { cm.state.selectingText(e); }
+
+  if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }
+
+  if (button == 1) {
+    if (pos) { leftButtonDown(cm, pos, repeat, e); }
+    else if (e_target(e) == display.scroller) { e_preventDefault(e); }
+  } else if (button == 2) {
+    if (pos) { extendSelection(cm.doc, pos); }
+    setTimeout(function () { return display.input.focus(); }, 20);
+  } else if (button == 3) {
+    if (captureRightClick) { onContextMenu(cm, e); }
+    else { delayBlurEvent(cm); }
+  }
+}
+
+function handleMappedButton(cm, button, pos, repeat, event) {
+  var name = "Click";
+  if (repeat == "double") { name = "Double" + name; }
+  else if (repeat == "triple") { name = "Triple" + name; }
+  name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name;
+
+  return dispatchKey(cm,  addModifierNames(name, event), event, function (bound) {
+    if (typeof bound == "string") { bound = commands[bound]; }
+    if (!bound) { return false }
+    var done = false;
+    try {
+      if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
+      done = bound(cm, pos) != Pass;
+    } finally {
+      cm.state.suppressEdits = false;
+    }
+    return done
+  })
+}
+
+function configureMouse(cm, repeat, event) {
+  var option = cm.getOption("configureMouse");
+  var value = option ? option(cm, repeat, event) : {};
+  if (value.unit == null) {
+    var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey;
+    value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line";
+  }
+  if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey; }
+  if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey; }
+  if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey); }
+  return value
+}
+
+function leftButtonDown(cm, pos, repeat, event) {
+  if (ie) { setTimeout(bind(ensureFocus, cm), 0); }
+  else { cm.curOp.focus = activeElt(); }
+
+  var behavior = configureMouse(cm, repeat, event);
+
+  var sel = cm.doc.sel, contained;
+  if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
+      repeat == "single" && (contained = sel.contains(pos)) > -1 &&
+      (cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
+      (cmp(contained.to(), pos) > 0 || pos.xRel < 0))
+    { leftButtonStartDrag(cm, event, pos, behavior); }
+  else
+    { leftButtonSelect(cm, event, pos, behavior); }
+}
+
+// Start a text drag. When it ends, see if any dragging actually
+// happen, and treat as a click if it didn't.
+function leftButtonStartDrag(cm, event, pos, behavior) {
+  var display = cm.display, moved = false;
+  var dragEnd = operation(cm, function (e) {
+    if (webkit) { display.scroller.draggable = false; }
+    cm.state.draggingText = false;
+    off(document, "mouseup", dragEnd);
+    off(document, "mousemove", mouseMove);
+    off(display.scroller, "dragstart", dragStart);
+    off(display.scroller, "drop", dragEnd);
+    if (!moved) {
+      e_preventDefault(e);
+      if (!behavior.addNew)
+        { extendSelection(cm.doc, pos, null, null, behavior.extend); }
+      // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
+      if (webkit || ie && ie_version == 9)
+        { setTimeout(function () {document.body.focus(); display.input.focus();}, 20); }
+      else
+        { display.input.focus(); }
+    }
+  });
+  var mouseMove = function(e2) {
+    moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10;
+  };
+  var dragStart = function () { return moved = true; };
+  // Let the drag handler handle this.
+  if (webkit) { display.scroller.draggable = true; }
+  cm.state.draggingText = dragEnd;
+  dragEnd.copy = !behavior.moveOnDrag;
+  // IE's approach to draggable
+  if (display.scroller.dragDrop) { display.scroller.dragDrop(); }
+  on(document, "mouseup", dragEnd);
+  on(document, "mousemove", mouseMove);
+  on(display.scroller, "dragstart", dragStart);
+  on(display.scroller, "drop", dragEnd);
+
+  delayBlurEvent(cm);
+  setTimeout(function () { return display.input.focus(); }, 20);
+}
+
+function rangeForUnit(cm, pos, unit) {
+  if (unit == "char") { return new Range(pos, pos) }
+  if (unit == "word") { return cm.findWordAt(pos) }
+  if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
+  var result = unit(cm, pos);
+  return new Range(result.from, result.to)
+}
+
+// Normal selection, as opposed to text dragging.
+function leftButtonSelect(cm, event, start, behavior) {
+  var display = cm.display, doc = cm.doc;
+  e_preventDefault(event);
+
+  var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges;
+  if (behavior.addNew && !behavior.extend) {
+    ourIndex = doc.sel.contains(start);
+    if (ourIndex > -1)
+      { ourRange = ranges[ourIndex]; }
+    else
+      { ourRange = new Range(start, start); }
+  } else {
+    ourRange = doc.sel.primary();
+    ourIndex = doc.sel.primIndex;
+  }
+
+  if (behavior.unit == "rectangle") {
+    if (!behavior.addNew) { ourRange = new Range(start, start); }
+    start = posFromMouse(cm, event, true, true);
+    ourIndex = -1;
+  } else {
+    var range$$1 = rangeForUnit(cm, start, behavior.unit);
+    if (behavior.extend)
+      { ourRange = extendRange(ourRange, range$$1.anchor, range$$1.head, behavior.extend); }
+    else
+      { ourRange = range$$1; }
+  }
+
+  if (!behavior.addNew) {
+    ourIndex = 0;
+    setSelection(doc, new Selection([ourRange], 0), sel_mouse);
+    startSel = doc.sel;
+  } else if (ourIndex == -1) {
+    ourIndex = ranges.length;
+    setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
+                 {scroll: false, origin: "*mouse"});
+  } else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
+    setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
+                 {scroll: false, origin: "*mouse"});
+    startSel = doc.sel;
+  } else {
+    replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
+  }
+
+  var lastPos = start;
+  function extendTo(pos) {
+    if (cmp(lastPos, pos) == 0) { return }
+    lastPos = pos;
+
+    if (behavior.unit == "rectangle") {
+      var ranges = [], tabSize = cm.options.tabSize;
+      var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize);
+      var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
+      var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
+      for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
+           line <= end; line++) {
+        var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize);
+        if (left == right)
+          { ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))); }
+        else if (text.length > leftPos)
+          { ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))); }
+      }
+      if (!ranges.length) { ranges.push(new Range(start, start)); }
+      setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
+                   {origin: "*mouse", scroll: false});
+      cm.scrollIntoView(pos);
+    } else {
+      var oldRange = ourRange;
+      var range$$1 = rangeForUnit(cm, pos, behavior.unit);
+      var anchor = oldRange.anchor, head;
+      if (cmp(range$$1.anchor, anchor) > 0) {
+        head = range$$1.head;
+        anchor = minPos(oldRange.from(), range$$1.anchor);
+      } else {
+        head = range$$1.anchor;
+        anchor = maxPos(oldRange.to(), range$$1.head);
+      }
+      var ranges$1 = startSel.ranges.slice(0);
+      ranges$1[ourIndex] = bidiSimplify(cm, new Range(clipPos(doc, anchor), head));
+      setSelection(doc, normalizeSelection(ranges$1, ourIndex), sel_mouse);
+    }
+  }
+
+  var editorSize = display.wrapper.getBoundingClientRect();
+  // Used to ensure timeout re-tries don't fire when another extend
+  // happened in the meantime (clearTimeout isn't reliable -- at
+  // least on Chrome, the timeouts still happen even when cleared,
+  // if the clear happens after their scheduled firing time).
+  var counter = 0;
+
+  function extend(e) {
+    var curCount = ++counter;
+    var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle");
+    if (!cur) { return }
+    if (cmp(cur, lastPos) != 0) {
+      cm.curOp.focus = activeElt();
+      extendTo(cur);
+      var visible = visibleLines(display, doc);
+      if (cur.line >= visible.to || cur.line < visible.from)
+        { setTimeout(operation(cm, function () {if (counter == curCount) { extend(e); }}), 150); }
+    } else {
+      var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
+      if (outside) { setTimeout(operation(cm, function () {
+        if (counter != curCount) { return }
+        display.scroller.scrollTop += outside;
+        extend(e);
+      }), 50); }
+    }
+  }
+
+  function done(e) {
+    cm.state.selectingText = false;
+    counter = Infinity;
+    e_preventDefault(e);
+    display.input.focus();
+    off(document, "mousemove", move);
+    off(document, "mouseup", up);
+    doc.history.lastSelOrigin = null;
+  }
+
+  var move = operation(cm, function (e) {
+    if (!e_button(e)) { done(e); }
+    else { extend(e); }
+  });
+  var up = operation(cm, done);
+  cm.state.selectingText = up;
+  on(document, "mousemove", move);
+  on(document, "mouseup", up);
+}
+
+// Used when mouse-selecting to adjust the anchor to the proper side
+// of a bidi jump depending on the visual position of the head.
+function bidiSimplify(cm, range$$1) {
+  var anchor = range$$1.anchor;
+  var head = range$$1.head;
+  var anchorLine = getLine(cm.doc, anchor.line);
+  if (cmp(anchor, head) == 0 && anchor.sticky == head.sticky) { return range$$1 }
+  var order = getOrder(anchorLine);
+  if (!order) { return range$$1 }
+  var index = getBidiPartAt(order, anchor.ch, anchor.sticky), part = order[index];
+  if (part.from != anchor.ch && part.to != anchor.ch) { return range$$1 }
+  var boundary = index + ((part.from == anchor.ch) == (part.level != 1) ? 0 : 1);
+  if (boundary == 0 || boundary == order.length) { return range$$1 }
+
+  // Compute the relative visual position of the head compared to the
+  // anchor (<0 is to the left, >0 to the right)
+  var leftSide;
+  if (head.line != anchor.line) {
+    leftSide = (head.line - anchor.line) * (cm.doc.direction == "ltr" ? 1 : -1) > 0;
+  } else {
+    var headIndex = getBidiPartAt(order, head.ch, head.sticky);
+    var dir = headIndex - index || (head.ch - anchor.ch) * (part.level == 1 ? -1 : 1);
+    if (headIndex == boundary - 1 || headIndex == boundary)
+      { leftSide = dir < 0; }
+    else
+      { leftSide = dir > 0; }
+  }
+
+  var usePart = order[boundary + (leftSide ? -1 : 0)];
+  var from = leftSide == (usePart.level == 1);
+  var ch = from ? usePart.from : usePart.to, sticky = from ? "after" : "before";
+  return anchor.ch == ch && anchor.sticky == sticky ? range$$1 : new Range(new Pos(anchor.line, ch, sticky), head)
+}
+
+
+// Determines whether an event happened in the gutter, and fires the
+// handlers for the corresponding event.
+function gutterEvent(cm, e, type, prevent) {
+  var mX, mY;
+  if (e.touches) {
+    mX = e.touches[0].clientX;
+    mY = e.touches[0].clientY;
+  } else {
+    try { mX = e.clientX; mY = e.clientY; }
+    catch(e) { return false }
+  }
+  if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
+  if (prevent) { e_preventDefault(e); }
+
+  var display = cm.display;
+  var lineBox = display.lineDiv.getBoundingClientRect();
+
+  if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
+  mY -= lineBox.top - display.viewOffset;
+
+  for (var i = 0; i < cm.options.gutters.length; ++i) {
+    var g = display.gutters.childNodes[i];
+    if (g && g.getBoundingClientRect().right >= mX) {
+      var line = lineAtHeight(cm.doc, mY);
+      var gutter = cm.options.gutters[i];
+      signal(cm, type, cm, line, gutter, e);
+      return e_defaultPrevented(e)
+    }
+  }
+}
+
+function clickInGutter(cm, e) {
+  return gutterEvent(cm, e, "gutterClick", true)
+}
+
+// CONTEXT MENU HANDLING
+
+// To make the context menu work, we need to briefly unhide the
+// textarea (making it as unobtrusive as possible) to let the
+// right-click take effect on it.
+function onContextMenu(cm, e) {
+  if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
+  if (signalDOMEvent(cm, e, "contextmenu")) { return }
+  cm.display.input.onContextMenu(e);
+}
+
+function contextMenuInGutter(cm, e) {
+  if (!hasHandler(cm, "gutterContextMenu")) { return false }
+  return gutterEvent(cm, e, "gutterContextMenu", false)
+}
+
+function themeChanged(cm) {
+  cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
+    cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
+  clearCaches(cm);
+}
+
+var Init = {toString: function(){return "CodeMirror.Init"}};
+
+var defaults = {};
+var optionHandlers = {};
+
+function defineOptions(CodeMirror) {
+  var optionHandlers = CodeMirror.optionHandlers;
+
+  function option(name, deflt, handle, notOnInit) {
+    CodeMirror.defaults[name] = deflt;
+    if (handle) { optionHandlers[name] =
+      notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old); }} : handle; }
+  }
+
+  CodeMirror.defineOption = option;
+
+  // Passed to option handlers when there is no old value.
+  CodeMirror.Init = Init;
+
+  // These two are, on init, called from the constructor because they
+  // have to be initialized before the editor can start at all.
+  option("value", "", function (cm, val) { return cm.setValue(val); }, true);
+  option("mode", null, function (cm, val) {
+    cm.doc.modeOption = val;
+    loadMode(cm);
+  }, true);
+
+  option("indentUnit", 2, loadMode, true);
+  option("indentWithTabs", false);
+  option("smartIndent", true);
+  option("tabSize", 4, function (cm) {
+    resetModeState(cm);
+    clearCaches(cm);
+    regChange(cm);
+  }, true);
+  option("lineSeparator", null, function (cm, val) {
+    cm.doc.lineSep = val;
+    if (!val) { return }
+    var newBreaks = [], lineNo = cm.doc.first;
+    cm.doc.iter(function (line) {
+      for (var pos = 0;;) {
+        var found = line.text.indexOf(val, pos);
+        if (found == -1) { break }
+        pos = found + val.length;
+        newBreaks.push(Pos(lineNo, found));
+      }
+      lineNo++;
+    });
+    for (var i = newBreaks.length - 1; i >= 0; i--)
+      { replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)); }
+  });
+  option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b-\u200f\u2028\u2029\ufeff]/g, function (cm, val, old) {
+    cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
+    if (old != Init) { cm.refresh(); }
+  });
+  option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true);
+  option("electricChars", true);
+  option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
+    throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
+  }, true);
+  option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true);
+  option("rtlMoveVisually", !windows);
+  option("wholeLineUpdateBefore", true);
+
+  option("theme", "default", function (cm) {
+    themeChanged(cm);
+    guttersChanged(cm);
+  }, true);
+  option("keyMap", "default", function (cm, val, old) {
+    var next = getKeyMap(val);
+    var prev = old != Init && getKeyMap(old);
+    if (prev && prev.detach) { prev.detach(cm, next); }
+    if (next.attach) { next.attach(cm, prev || null); }
+  });
+  option("extraKeys", null);
+  option("configureMouse", null);
+
+  option("lineWrapping", false, wrappingChanged, true);
+  option("gutters", [], function (cm) {
+    setGuttersForLineNumbers(cm.options);
+    guttersChanged(cm);
+  }, true);
+  option("fixedGutter", true, function (cm, val) {
+    cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
+    cm.refresh();
+  }, true);
+  option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true);
+  option("scrollbarStyle", "native", function (cm) {
+    initScrollbars(cm);
+    updateScrollbars(cm);
+    cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
+    cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
+  }, true);
+  option("lineNumbers", false, function (cm) {
+    setGuttersForLineNumbers(cm.options);
+    guttersChanged(cm);
+  }, true);
+  option("firstLineNumber", 1, guttersChanged, true);
+  option("lineNumberFormatter", function (integer) { return integer; }, guttersChanged, true);
+  option("showCursorWhenSelecting", false, updateSelection, true);
+
+  option("resetSelectionOnContextMenu", true);
+  option("lineWiseCopyCut", true);
+  option("pasteLinesPerSelection", true);
+
+  option("readOnly", false, function (cm, val) {
+    if (val == "nocursor") {
+      onBlur(cm);
+      cm.display.input.blur();
+    }
+    cm.display.input.readOnlyChanged(val);
+  });
+  option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset(); }}, true);
+  option("dragDrop", true, dragDropChanged);
+  option("allowDropFileTypes", null);
+
+  option("cursorBlinkRate", 530);
+  option("cursorScrollMargin", 0);
+  option("cursorHeight", 1, updateSelection, true);
+  option("singleCursorHeightPerLine", true, updateSelection, true);
+  option("workTime", 100);
+  option("workDelay", 100);
+  option("flattenSpans", true, resetModeState, true);
+  option("addModeClass", false, resetModeState, true);
+  option("pollInterval", 100);
+  option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; });
+  option("historyEventDelay", 1250);
+  option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true);
+  option("maxHighlightLength", 10000, resetModeState, true);
+  option("moveInputWithCursor", true, function (cm, val) {
+    if (!val) { cm.display.input.resetPosition(); }
+  });
+
+  option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; });
+  option("autofocus", null);
+  option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true);
+}
+
+function guttersChanged(cm) {
+  updateGutters(cm);
+  regChange(cm);
+  alignHorizontally(cm);
+}
+
+function dragDropChanged(cm, value, old) {
+  var wasOn = old && old != Init;
+  if (!value != !wasOn) {
+    var funcs = cm.display.dragFunctions;
+    var toggle = value ? on : off;
+    toggle(cm.display.scroller, "dragstart", funcs.start);
+    toggle(cm.display.scroller, "dragenter", funcs.enter);
+    toggle(cm.display.scroller, "dragover", funcs.over);
+    toggle(cm.display.scroller, "dragleave", funcs.leave);
+    toggle(cm.display.scroller, "drop", funcs.drop);
+  }
+}
+
+function wrappingChanged(cm) {
+  if (cm.options.lineWrapping) {
+    addClass(cm.display.wrapper, "CodeMirror-wrap");
+    cm.display.sizer.style.minWidth = "";
+    cm.display.sizerWidth = null;
+  } else {
+    rmClass(cm.display.wrapper, "CodeMirror-wrap");
+    findMaxLine(cm);
+  }
+  estimateLineHeights(cm);
+  regChange(cm);
+  clearCaches(cm);
+  setTimeout(function () { return updateScrollbars(cm); }, 100);
+}
+
+// A CodeMirror instance represents an editor. This is the object
+// that user code is usually dealing with.
+
+function CodeMirror$1(place, options) {
+  var this$1 = this;
+
+  if (!(this instanceof CodeMirror$1)) { return new CodeMirror$1(place, options) }
+
+  this.options = options = options ? copyObj(options) : {};
+  // Determine effective options based on given values and defaults.
+  copyObj(defaults, options, false);
+  setGuttersForLineNumbers(options);
+
+  var doc = options.value;
+  if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction); }
+  this.doc = doc;
+
+  var input = new CodeMirror$1.inputStyles[options.inputStyle](this);
+  var display = this.display = new Display(place, doc, input);
+  display.wrapper.CodeMirror = this;
+  updateGutters(this);
+  themeChanged(this);
+  if (options.lineWrapping)
+    { this.display.wrapper.className += " CodeMirror-wrap"; }
+  initScrollbars(this);
+
+  this.state = {
+    keyMaps: [],  // stores maps added by addKeyMap
+    overlays: [], // highlighting overlays, as added by addOverlay
+    modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
+    overwrite: false,
+    delayingBlurEvent: false,
+    focused: false,
+    suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
+    pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
+    selectingText: false,
+    draggingText: false,
+    highlight: new Delayed(), // stores highlight worker timeout
+    keySeq: null,  // Unfinished key sequence
+    specialChars: null
+  };
+
+  if (options.autofocus && !mobile) { display.input.focus(); }
+
+  // Override magic textarea content restore that IE sometimes does
+  // on our hidden textarea on reload
+  if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20); }
+
+  registerEventHandlers(this);
+  ensureGlobalHandlers();
+
+  startOperation(this);
+  this.curOp.forceUpdate = true;
+  attachDoc(this, doc);
+
+  if ((options.autofocus && !mobile) || this.hasFocus())
+    { setTimeout(bind(onFocus, this), 20); }
+  else
+    { onBlur(this); }
+
+  for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
+    { optionHandlers[opt](this$1, options[opt], Init); } }
+  maybeUpdateLineNumberWidth(this);
+  if (options.finishInit) { options.finishInit(this); }
+  for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this$1); }
+  endOperation(this);
+  // Suppress optimizelegibility in Webkit, since it breaks text
+  // measuring on line wrapping boundaries.
+  if (webkit && options.lineWrapping &&
+      getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
+    { display.lineDiv.style.textRendering = "auto"; }
+}
+
+// The default configuration options.
+CodeMirror$1.defaults = defaults;
+// Functions to run when options are changed.
+CodeMirror$1.optionHandlers = optionHandlers;
+
+// Attach the necessary event handlers when initializing the editor
+function registerEventHandlers(cm) {
+  var d = cm.display;
+  on(d.scroller, "mousedown", operation(cm, onMouseDown));
+  // Older IE's will not fire a second mousedown for a double click
+  if (ie && ie_version < 11)
+    { on(d.scroller, "dblclick", operation(cm, function (e) {
+      if (signalDOMEvent(cm, e)) { return }
+      var pos = posFromMouse(cm, e);
+      if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
+      e_preventDefault(e);
+      var word = cm.findWordAt(pos);
+      extendSelection(cm.doc, word.anchor, word.head);
+    })); }
+  else
+    { on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }); }
+  // Some browsers fire contextmenu *after* opening the menu, at
+  // which point we can't mess with it anymore. Context menu is
+  // handled in onMouseDown for these browsers.
+  if (!captureRightClick) { on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); }); }
+
+  // Used to suppress mouse event handling when a touch happens
+  var touchFinished, prevTouch = {end: 0};
+  function finishTouch() {
+    if (d.activeTouch) {
+      touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000);
+      prevTouch = d.activeTouch;
+      prevTouch.end = +new Date;
+    }
+  }
+  function isMouseLikeTouchEvent(e) {
+    if (e.touches.length != 1) { return false }
+    var touch = e.touches[0];
+    return touch.radiusX <= 1 && touch.radiusY <= 1
+  }
+  function farAway(touch, other) {
+    if (other.left == null) { return true }
+    var dx = other.left - touch.left, dy = other.top - touch.top;
+    return dx * dx + dy * dy > 20 * 20
+  }
+  on(d.scroller, "touchstart", function (e) {
+    if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e) && !clickInGutter(cm, e)) {
+      d.input.ensurePolled();
+      clearTimeout(touchFinished);
+      var now = +new Date;
+      d.activeTouch = {start: now, moved: false,
+                       prev: now - prevTouch.end <= 300 ? prevTouch : null};
+      if (e.touches.length == 1) {
+        d.activeTouch.left = e.touches[0].pageX;
+        d.activeTouch.top = e.touches[0].pageY;
+      }
+    }
+  });
+  on(d.scroller, "touchmove", function () {
+    if (d.activeTouch) { d.activeTouch.moved = true; }
+  });
+  on(d.scroller, "touchend", function (e) {
+    var touch = d.activeTouch;
+    if (touch && !eventInWidget(d, e) && touch.left != null &&
+        !touch.moved && new Date - touch.start < 300) {
+      var pos = cm.coordsChar(d.activeTouch, "page"), range;
+      if (!touch.prev || farAway(touch, touch.prev)) // Single tap
+        { range = new Range(pos, pos); }
+      else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
+        { range = cm.findWordAt(pos); }
+      else // Triple tap
+        { range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))); }
+      cm.setSelection(range.anchor, range.head);
+      cm.focus();
+      e_preventDefault(e);
+    }
+    finishTouch();
+  });
+  on(d.scroller, "touchcancel", finishTouch);
+
+  // Sync scrolling between fake scrollbars and real scrollable
+  // area, ensure viewport is updated when scrolling.
+  on(d.scroller, "scroll", function () {
+    if (d.scroller.clientHeight) {
+      updateScrollTop(cm, d.scroller.scrollTop);
+      setScrollLeft(cm, d.scroller.scrollLeft, true);
+      signal(cm, "scroll", cm);
+    }
+  });
+
+  // Listen to wheel events in order to try and update the viewport on time.
+  on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); });
+  on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); });
+
+  // Prevent wrapper from ever scrolling
+  on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
+
+  d.dragFunctions = {
+    enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e); }},
+    over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
+    start: function (e) { return onDragStart(cm, e); },
+    drop: operation(cm, onDrop),
+    leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }}
+  };
+
+  var inp = d.input.getField();
+  on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); });
+  on(inp, "keydown", operation(cm, onKeyDown));
+  on(inp, "keypress", operation(cm, onKeyPress));
+  on(inp, "focus", function (e) { return onFocus(cm, e); });
+  on(inp, "blur", function (e) { return onBlur(cm, e); });
+}
+
+var initHooks = [];
+CodeMirror$1.defineInitHook = function (f) { return initHooks.push(f); };
+
+// Indent the given line. The how parameter can be "smart",
+// "add"/null, "subtract", or "prev". When aggressive is false
+// (typically set to true for forced single-line indents), empty
+// lines are not indented, and places where the mode returns Pass
+// are left alone.
+function indentLine(cm, n, how, aggressive) {
+  var doc = cm.doc, state;
+  if (how == null) { how = "add"; }
+  if (how == "smart") {
+    // Fall back to "prev" when the mode doesn't have an indentation
+    // method.
+    if (!doc.mode.indent) { how = "prev"; }
+    else { state = getContextBefore(cm, n).state; }
+  }
+
+  var tabSize = cm.options.tabSize;
+  var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
+  if (line.stateAfter) { line.stateAfter = null; }
+  var curSpaceString = line.text.match(/^\s*/)[0], indentation;
+  if (!aggressive && !/\S/.test(line.text)) {
+    indentation = 0;
+    how = "not";
+  } else if (how == "smart") {
+    indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
+    if (indentation == Pass || indentation > 150) {
+      if (!aggressive) { return }
+      how = "prev";
+    }
+  }
+  if (how == "prev") {
+    if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize); }
+    else { indentation = 0; }
+  } else if (how == "add") {
+    indentation = curSpace + cm.options.indentUnit;
+  } else if (how == "subtract") {
+    indentation = curSpace - cm.options.indentUnit;
+  } else if (typeof how == "number") {
+    indentation = curSpace + how;
+  }
+  indentation = Math.max(0, indentation);
+
+  var indentString = "", pos = 0;
+  if (cm.options.indentWithTabs)
+    { for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";} }
+  if (pos < indentation) { indentString += spaceStr(indentation - pos); }
+
+  if (indentString != curSpaceString) {
+    replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
+    line.stateAfter = null;
+    return true
+  } else {
+    // Ensure that, if the cursor was in the whitespace at the start
+    // of the line, it is moved to the end of that space.
+    for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
+      var range = doc.sel.ranges[i$1];
+      if (range.head.line == n && range.head.ch < curSpaceString.length) {
+        var pos$1 = Pos(n, curSpaceString.length);
+        replaceOneSelection(doc, i$1, new Range(pos$1, pos$1));
+        break
+      }
+    }
+  }
+}
+
+// This will be set to a {lineWise: bool, text: [string]} object, so
+// that, when pasting, we know what kind of selections the copied
+// text was made out of.
+var lastCopied = null;
+
+function setLastCopied(newLastCopied) {
+  lastCopied = newLastCopied;
+}
+
+function applyTextInput(cm, inserted, deleted, sel, origin) {
+  var doc = cm.doc;
+  cm.display.shift = false;
+  if (!sel) { sel = doc.sel; }
+
+  var paste = cm.state.pasteIncoming || origin == "paste";
+  var textLines = splitLinesAuto(inserted), multiPaste = null;
+  // When pasing N lines into N selections, insert one line per selection
+  if (paste && sel.ranges.length > 1) {
+    if (lastCopied && lastCopied.text.join("\n") == inserted) {
+      if (sel.ranges.length % lastCopied.text.length == 0) {
+        multiPaste = [];
+        for (var i = 0; i < lastCopied.text.length; i++)
+          { multiPaste.push(doc.splitLines(lastCopied.text[i])); }
+      }
+    } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
+      multiPaste = map(textLines, function (l) { return [l]; });
+    }
+  }
+
+  var updateInput;
+  // Normal behavior is to insert the new text into every selection
+  for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
+    var range$$1 = sel.ranges[i$1];
+    var from = range$$1.from(), to = range$$1.to();
+    if (range$$1.empty()) {
+      if (deleted && deleted > 0) // Handle deletion
+        { from = Pos(from.line, from.ch - deleted); }
+      else if (cm.state.overwrite && !paste) // Handle overwrite
+        { to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)); }
+      else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
+        { from = to = Pos(from.line, 0); }
+    }
+    updateInput = cm.curOp.updateInput;
+    var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
+                       origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")};
+    makeChange(cm.doc, changeEvent);
+    signalLater(cm, "inputRead", cm, changeEvent);
+  }
+  if (inserted && !paste)
+    { triggerElectric(cm, inserted); }
+
+  ensureCursorVisible(cm);
+  cm.curOp.updateInput = updateInput;
+  cm.curOp.typing = true;
+  cm.state.pasteIncoming = cm.state.cutIncoming = false;
+}
+
+function handlePaste(e, cm) {
+  var pasted = e.clipboardData && e.clipboardData.getData("Text");
+  if (pasted) {
+    e.preventDefault();
+    if (!cm.isReadOnly() && !cm.options.disableInput)
+      { runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }); }
+    return true
+  }
+}
+
+function triggerElectric(cm, inserted) {
+  // When an 'electric' character is inserted, immediately trigger a reindent
+  if (!cm.options.electricChars || !cm.options.smartIndent) { return }
+  var sel = cm.doc.sel;
+
+  for (var i = sel.ranges.length - 1; i >= 0; i--) {
+    var range$$1 = sel.ranges[i];
+    if (range$$1.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range$$1.head.line)) { continue }
+    var mode = cm.getModeAt(range$$1.head);
+    var indented = false;
+    if (mode.electricChars) {
+      for (var j = 0; j < mode.electricChars.length; j++)
+        { if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
+          indented = indentLine(cm, range$$1.head.line, "smart");
+          break
+        } }
+    } else if (mode.electricInput) {
+      if (mode.electricInput.test(getLine(cm.doc, range$$1.head.line).text.slice(0, range$$1.head.ch)))
+        { indented = indentLine(cm, range$$1.head.line, "smart"); }
+    }
+    if (indented) { signalLater(cm, "electricInput", cm, range$$1.head.line); }
+  }
+}
+
+function copyableRanges(cm) {
+  var text = [], ranges = [];
+  for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
+    var line = cm.doc.sel.ranges[i].head.line;
+    var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
+    ranges.push(lineRange);
+    text.push(cm.getRange(lineRange.anchor, lineRange.head));
+  }
+  return {text: text, ranges: ranges}
+}
+
+function disableBrowserMagic(field, spellcheck) {
+  field.setAttribute("autocorrect", "off");
+  field.setAttribute("autocapitalize", "off");
+  field.setAttribute("spellcheck", !!spellcheck);
+}
+
+function hiddenTextarea() {
+  var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none");
+  var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
+  // The textarea is kept positioned near the cursor to prevent the
+  // fact that it'll be scrolled into view on input from scrolling
+  // our fake cursor out of view. On webkit, when wrap=off, paste is
+  // very slow. So make the area wide instead.
+  if (webkit) { te.style.width = "1000px"; }
+  else { te.setAttribute("wrap", "off"); }
+  // If border: 0; -- iOS fails to open keyboard (issue #1287)
+  if (ios) { te.style.border = "1px solid black"; }
+  disableBrowserMagic(te);
+  return div
+}
+
+// The publicly visible API. Note that methodOp(f) means
+// 'wrap f in an operation, performed on its `this` parameter'.
+
+// This is not the complete set of editor methods. Most of the
+// methods defined on the Doc type are also injected into
+// CodeMirror.prototype, for backwards compatibility and
+// convenience.
+
+var addEditorMethods = function(CodeMirror) {
+  var optionHandlers = CodeMirror.optionHandlers;
+
+  var helpers = CodeMirror.helpers = {};
+
+  CodeMirror.prototype = {
+    constructor: CodeMirror,
+    focus: function(){window.focus(); this.display.input.focus();},
+
+    setOption: function(option, value) {
+      var options = this.options, old = options[option];
+      if (options[option] == value && option != "mode") { return }
+      options[option] = value;
+      if (optionHandlers.hasOwnProperty(option))
+        { operation(this, optionHandlers[option])(this, value, old); }
+      signal(this, "optionChange", this, option);
+    },
+
+    getOption: function(option) {return this.options[option]},
+    getDoc: function() {return this.doc},
+
+    addKeyMap: function(map$$1, bottom) {
+      this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map$$1));
+    },
+    removeKeyMap: function(map$$1) {
+      var maps = this.state.keyMaps;
+      for (var i = 0; i < maps.length; ++i)
+        { if (maps[i] == map$$1 || maps[i].name == map$$1) {
+          maps.splice(i, 1);
+          return true
+        } }
+    },
+
+    addOverlay: methodOp(function(spec, options) {
+      var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
+      if (mode.startState) { throw new Error("Overlays may not be stateful.") }
+      insertSorted(this.state.overlays,
+                   {mode: mode, modeSpec: spec, opaque: options && options.opaque,
+                    priority: (options && options.priority) || 0},
+                   function (overlay) { return overlay.priority; });
+      this.state.modeGen++;
+      regChange(this);
+    }),
+    removeOverlay: methodOp(function(spec) {
+      var this$1 = this;
+
+      var overlays = this.state.overlays;
+      for (var i = 0; i < overlays.length; ++i) {
+        var cur = overlays[i].modeSpec;
+        if (cur == spec || typeof spec == "string" && cur.name == spec) {
+          overlays.splice(i, 1);
+          this$1.state.modeGen++;
+          regChange(this$1);
+          return
+        }
+      }
+    }),
+
+    indentLine: methodOp(function(n, dir, aggressive) {
+      if (typeof dir != "string" && typeof dir != "number") {
+        if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev"; }
+        else { dir = dir ? "add" : "subtract"; }
+      }
+      if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive); }
+    }),
+    indentSelection: methodOp(function(how) {
+      var this$1 = this;
+
+      var ranges = this.doc.sel.ranges, end = -1;
+      for (var i = 0; i < ranges.length; i++) {
+        var range$$1 = ranges[i];
+        if (!range$$1.empty()) {
+          var from = range$$1.from(), to = range$$1.to();
+          var start = Math.max(end, from.line);
+          end = Math.min(this$1.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
+          for (var j = start; j < end; ++j)
+            { indentLine(this$1, j, how); }
+          var newRanges = this$1.doc.sel.ranges;
+          if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
+            { replaceOneSelection(this$1.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll); }
+        } else if (range$$1.head.line > end) {
+          indentLine(this$1, range$$1.head.line, how, true);
+          end = range$$1.head.line;
+          if (i == this$1.doc.sel.primIndex) { ensureCursorVisible(this$1); }
+        }
+      }
+    }),
+
+    // Fetch the parser token for a given character. Useful for hacks
+    // that want to inspect the mode state (say, for completion).
+    getTokenAt: function(pos, precise) {
+      return takeToken(this, pos, precise)
+    },
+
+    getLineTokens: function(line, precise) {
+      return takeToken(this, Pos(line), precise, true)
+    },
+
+    getTokenTypeAt: function(pos) {
+      pos = clipPos(this.doc, pos);
+      var styles = getLineStyles(this, getLine(this.doc, pos.line));
+      var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
+      var type;
+      if (ch == 0) { type = styles[2]; }
+      else { for (;;) {
+        var mid = (before + after) >> 1;
+        if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid; }
+        else if (styles[mid * 2 + 1] < ch) { before = mid + 1; }
+        else { type = styles[mid * 2 + 2]; break }
+      } }
+      var cut = type ? type.indexOf("overlay ") : -1;
+      return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
+    },
+
+    getModeAt: function(pos) {
+      var mode = this.doc.mode;
+      if (!mode.innerMode) { return mode }
+      return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
+    },
+
+    getHelper: function(pos, type) {
+      return this.getHelpers(pos, type)[0]
+    },
+
+    getHelpers: function(pos, type) {
+      var this$1 = this;
+
+      var found = [];
+      if (!helpers.hasOwnProperty(type)) { return found }
+      var help = helpers[type], mode = this.getModeAt(pos);
+      if (typeof mode[type] == "string") {
+        if (help[mode[type]]) { found.push(help[mode[type]]); }
+      } else if (mode[type]) {
+        for (var i = 0; i < mode[type].length; i++) {
+          var val = help[mode[type][i]];
+          if (val) { found.push(val); }
+        }
+      } else if (mode.helperType && help[mode.helperType]) {
+        found.push(help[mode.helperType]);
+      } else if (help[mode.name]) {
+        found.push(help[mode.name]);
+      }
+      for (var i$1 = 0; i$1 < help._global.length; i$1++) {
+        var cur = help._global[i$1];
+        if (cur.pred(mode, this$1) && indexOf(found, cur.val) == -1)
+          { found.push(cur.val); }
+      }
+      return found
+    },
+
+    getStateAfter: function(line, precise) {
+      var doc = this.doc;
+      line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
+      return getContextBefore(this, line + 1, precise).state
+    },
+
+    cursorCoords: function(start, mode) {
+      var pos, range$$1 = this.doc.sel.primary();
+      if (start == null) { pos = range$$1.head; }
+      else if (typeof start == "object") { pos = clipPos(this.doc, start); }
+      else { pos = start ? range$$1.from() : range$$1.to(); }
+      return cursorCoords(this, pos, mode || "page")
+    },
+
+    charCoords: function(pos, mode) {
+      return charCoords(this, clipPos(this.doc, pos), mode || "page")
+    },
+
+    coordsChar: function(coords, mode) {
+      coords = fromCoordSystem(this, coords, mode || "page");
+      return coordsChar(this, coords.left, coords.top)
+    },
+
+    lineAtHeight: function(height, mode) {
+      height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
+      return lineAtHeight(this.doc, height + this.display.viewOffset)
+    },
+    heightAtLine: function(line, mode, includeWidgets) {
+      var end = false, lineObj;
+      if (typeof line == "number") {
+        var last = this.doc.first + this.doc.size - 1;
+        if (line < this.doc.first) { line = this.doc.first; }
+        else if (line > last) { line = last; end = true; }
+        lineObj = getLine(this.doc, line);
+      } else {
+        lineObj = line;
+      }
+      return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
+        (end ? this.doc.height - heightAtLine(lineObj) : 0)
+    },
+
+    defaultTextHeight: function() { return textHeight(this.display) },
+    defaultCharWidth: function() { return charWidth(this.display) },
+
+    getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},
+
+    addWidget: function(pos, node, scroll, vert, horiz) {
+      var display = this.display;
+      pos = cursorCoords(this, clipPos(this.doc, pos));
+      var top = pos.bottom, left = pos.left;
+      node.style.position = "absolute";
+      node.setAttribute("cm-ignore-events", "true");
+      this.display.input.setUneditable(node);
+      display.sizer.appendChild(node);
+      if (vert == "over") {
+        top = pos.top;
+      } else if (vert == "above" || vert == "near") {
+        var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
+        hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
+        // Default to positioning above (if specified and possible); otherwise default to positioning below
+        if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
+          { top = pos.top - node.offsetHeight; }
+        else if (pos.bottom + node.offsetHeight <= vspace)
+          { top = pos.bottom; }
+        if (left + node.offsetWidth > hspace)
+          { left = hspace - node.offsetWidth; }
+      }
+      node.style.top = top + "px";
+      node.style.left = node.style.right = "";
+      if (horiz == "right") {
+        left = display.sizer.clientWidth - node.offsetWidth;
+        node.style.right = "0px";
+      } else {
+        if (horiz == "left") { left = 0; }
+        else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2; }
+        node.style.left = left + "px";
+      }
+      if (scroll)
+        { scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}); }
+    },
+
+    triggerOnKeyDown: methodOp(onKeyDown),
+    triggerOnKeyPress: methodOp(onKeyPress),
+    triggerOnKeyUp: onKeyUp,
+    triggerOnMouseDown: methodOp(onMouseDown),
+
+    execCommand: function(cmd) {
+      if (commands.hasOwnProperty(cmd))
+        { return commands[cmd].call(null, this) }
+    },
+
+    triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),
+
+    findPosH: function(from, amount, unit, visually) {
+      var this$1 = this;
+
+      var dir = 1;
+      if (amount < 0) { dir = -1; amount = -amount; }
+      var cur = clipPos(this.doc, from);
+      for (var i = 0; i < amount; ++i) {
+        cur = findPosH(this$1.doc, cur, dir, unit, visually);
+        if (cur.hitSide) { break }
+      }
+      return cur
+    },
+
+    moveH: methodOp(function(dir, unit) {
+      var this$1 = this;
+
+      this.extendSelectionsBy(function (range$$1) {
+        if (this$1.display.shift || this$1.doc.extend || range$$1.empty())
+          { return findPosH(this$1.doc, range$$1.head, dir, unit, this$1.options.rtlMoveVisually) }
+        else
+          { return dir < 0 ? range$$1.from() : range$$1.to() }
+      }, sel_move);
+    }),
+
+    deleteH: methodOp(function(dir, unit) {
+      var sel = this.doc.sel, doc = this.doc;
+      if (sel.somethingSelected())
+        { doc.replaceSelection("", null, "+delete"); }
+      else
+        { deleteNearSelection(this, function (range$$1) {
+          var other = findPosH(doc, range$$1.head, dir, unit, false);
+          return dir < 0 ? {from: other, to: range$$1.head} : {from: range$$1.head, to: other}
+        }); }
+    }),
+
+    findPosV: function(from, amount, unit, goalColumn) {
+      var this$1 = this;
+
+      var dir = 1, x = goalColumn;
+      if (amount < 0) { dir = -1; amount = -amount; }
+      var cur = clipPos(this.doc, from);
+      for (var i = 0; i < amount; ++i) {
+        var coords = cursorCoords(this$1, cur, "div");
+        if (x == null) { x = coords.left; }
+        else { coords.left = x; }
+        cur = findPosV(this$1, coords, dir, unit);
+        if (cur.hitSide) { break }
+      }
+      return cur
+    },
+
+    moveV: methodOp(function(dir, unit) {
+      var this$1 = this;
+
+      var doc = this.doc, goals = [];
+      var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected();
+      doc.extendSelectionsBy(function (range$$1) {
+        if (collapse)
+          { return dir < 0 ? range$$1.from() : range$$1.to() }
+        var headPos = cursorCoords(this$1, range$$1.head, "div");
+        if (range$$1.goalColumn != null) { headPos.left = range$$1.goalColumn; }
+        goals.push(headPos.left);
+        var pos = findPosV(this$1, headPos, dir, unit);
+        if (unit == "page" && range$$1 == doc.sel.primary())
+          { addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top); }
+        return pos
+      }, sel_move);
+      if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
+        { doc.sel.ranges[i].goalColumn = goals[i]; } }
+    }),
+
+    // Find the word at the given position (as returned by coordsChar).
+    findWordAt: function(pos) {
+      var doc = this.doc, line = getLine(doc, pos.line).text;
+      var start = pos.ch, end = pos.ch;
+      if (line) {
+        var helper = this.getHelper(pos, "wordChars");
+        if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end; }
+        var startChar = line.charAt(start);
+        var check = isWordChar(startChar, helper)
+          ? function (ch) { return isWordChar(ch, helper); }
+          : /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
+          : function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); };
+        while (start > 0 && check(line.charAt(start - 1))) { --start; }
+        while (end < line.length && check(line.charAt(end))) { ++end; }
+      }
+      return new Range(Pos(pos.line, start), Pos(pos.line, end))
+    },
+
+    toggleOverwrite: function(value) {
+      if (value != null && value == this.state.overwrite) { return }
+      if (this.state.overwrite = !this.state.overwrite)
+        { addClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
+      else
+        { rmClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
+
+      signal(this, "overwriteToggle", this, this.state.overwrite);
+    },
+    hasFocus: function() { return this.display.input.getField() == activeElt() },
+    isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },
+
+    scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y); }),
+    getScrollInfo: function() {
+      var scroller = this.display.scroller;
+      return {left: scroller.scrollLeft, top: scroller.scrollTop,
+              height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
+              width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
+              clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
+    },
+
+    scrollIntoView: methodOp(function(range$$1, margin) {
+      if (range$$1 == null) {
+        range$$1 = {from: this.doc.sel.primary().head, to: null};
+        if (margin == null) { margin = this.options.cursorScrollMargin; }
+      } else if (typeof range$$1 == "number") {
+        range$$1 = {from: Pos(range$$1, 0), to: null};
+      } else if (range$$1.from == null) {
+        range$$1 = {from: range$$1, to: null};
+      }
+      if (!range$$1.to) { range$$1.to = range$$1.from; }
+      range$$1.margin = margin || 0;
+
+      if (range$$1.from.line != null) {
+        scrollToRange(this, range$$1);
+      } else {
+        scrollToCoordsRange(this, range$$1.from, range$$1.to, range$$1.margin);
+      }
+    }),
+
+    setSize: methodOp(function(width, height) {
+      var this$1 = this;
+
+      var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; };
+      if (width != null) { this.display.wrapper.style.width = interpret(width); }
+      if (height != null) { this.display.wrapper.style.height = interpret(height); }
+      if (this.options.lineWrapping) { clearLineMeasurementCache(this); }
+      var lineNo$$1 = this.display.viewFrom;
+      this.doc.iter(lineNo$$1, this.display.viewTo, function (line) {
+        if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
+          { if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo$$1, "widget"); break } } }
+        ++lineNo$$1;
+      });
+      this.curOp.forceUpdate = true;
+      signal(this, "refresh", this);
+    }),
+
+    operation: function(f){return runInOp(this, f)},
+    startOperation: function(){return startOperation(this)},
+    endOperation: function(){return endOperation(this)},
+
+    refresh: methodOp(function() {
+      var oldHeight = this.display.cachedTextHeight;
+      regChange(this);
+      this.curOp.forceUpdate = true;
+      clearCaches(this);
+      scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop);
+      updateGutterSpace(this);
+      if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
+        { estimateLineHeights(this); }
+      signal(this, "refresh", this);
+    }),
+
+    swapDoc: methodOp(function(doc) {
+      var old = this.doc;
+      old.cm = null;
+      attachDoc(this, doc);
+      clearCaches(this);
+      this.display.input.reset();
+      scrollToCoords(this, doc.scrollLeft, doc.scrollTop);
+      this.curOp.forceScroll = true;
+      signalLater(this, "swapDoc", this, old);
+      return old
+    }),
+
+    getInputField: function(){return this.display.input.getField()},
+    getWrapperElement: function(){return this.display.wrapper},
+    getScrollerElement: function(){return this.display.scroller},
+    getGutterElement: function(){return this.display.gutters}
+  };
+  eventMixin(CodeMirror);
+
+  CodeMirror.registerHelper = function(type, name, value) {
+    if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []}; }
+    helpers[type][name] = value;
+  };
+  CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
+    CodeMirror.registerHelper(type, name, value);
+    helpers[type]._global.push({pred: predicate, val: value});
+  };
+};
+
+// Used for horizontal relative motion. Dir is -1 or 1 (left or
+// right), unit can be "char", "column" (like char, but doesn't
+// cross line boundaries), "word" (across next word), or "group" (to
+// the start of next group of word or non-word-non-whitespace
+// chars). The visually param controls whether, in right-to-left
+// text, direction 1 means to move towards the next index in the
+// string, or towards the character to the right of the current
+// position. The resulting position will have a hitSide=true
+// property if it reached the end of the document.
+function findPosH(doc, pos, dir, unit, visually) {
+  var oldPos = pos;
+  var origDir = dir;
+  var lineObj = getLine(doc, pos.line);
+  function findNextLine() {
+    var l = pos.line + dir;
+    if (l < doc.first || l >= doc.first + doc.size) { return false }
+    pos = new Pos(l, pos.ch, pos.sticky);
+    return lineObj = getLine(doc, l)
+  }
+  function moveOnce(boundToLine) {
+    var next;
+    if (visually) {
+      next = moveVisually(doc.cm, lineObj, pos, dir);
+    } else {
+      next = moveLogically(lineObj, pos, dir);
+    }
+    if (next == null) {
+      if (!boundToLine && findNextLine())
+        { pos = endOfLine(visually, doc.cm, lineObj, pos.line, dir); }
+      else
+        { return false }
+    } else {
+      pos = next;
+    }
+    return true
+  }
+
+  if (unit == "char") {
+    moveOnce();
+  } else if (unit == "column") {
+    moveOnce(true);
+  } else if (unit == "word" || unit == "group") {
+    var sawType = null, group = unit == "group";
+    var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
+    for (var first = true;; first = false) {
+      if (dir < 0 && !moveOnce(!first)) { break }
+      var cur = lineObj.text.charAt(pos.ch) || "\n";
+      var type = isWordChar(cur, helper) ? "w"
+        : group && cur == "\n" ? "n"
+        : !group || /\s/.test(cur) ? null
+        : "p";
+      if (group && !first && !type) { type = "s"; }
+      if (sawType && sawType != type) {
+        if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after";}
+        break
+      }
+
+      if (type) { sawType = type; }
+      if (dir > 0 && !moveOnce(!first)) { break }
+    }
+  }
+  var result = skipAtomic(doc, pos, oldPos, origDir, true);
+  if (equalCursorPos(oldPos, result)) { result.hitSide = true; }
+  return result
+}
+
+// For relative vertical movement. Dir may be -1 or 1. Unit can be
+// "page" or "line". The resulting position will have a hitSide=true
+// property if it reached the end of the document.
+function findPosV(cm, pos, dir, unit) {
+  var doc = cm.doc, x = pos.left, y;
+  if (unit == "page") {
+    var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
+    var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3);
+    y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount;
+
+  } else if (unit == "line") {
+    y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
+  }
+  var target;
+  for (;;) {
+    target = coordsChar(cm, x, y);
+    if (!target.outside) { break }
+    if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
+    y += dir * 5;
+  }
+  return target
+}
+
+// CONTENTEDITABLE INPUT STYLE
+
+var ContentEditableInput = function(cm) {
+  this.cm = cm;
+  this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null;
+  this.polling = new Delayed();
+  this.composing = null;
+  this.gracePeriod = false;
+  this.readDOMTimeout = null;
+};
+
+ContentEditableInput.prototype.init = function (display) {
+    var this$1 = this;
+
+  var input = this, cm = input.cm;
+  var div = input.div = display.lineDiv;
+  disableBrowserMagic(div, cm.options.spellcheck);
+
+  on(div, "paste", function (e) {
+    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+    // IE doesn't fire input events, so we schedule a read for the pasted content in this way
+    if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20); }
+  });
+
+  on(div, "compositionstart", function (e) {
+    this$1.composing = {data: e.data, done: false};
+  });
+  on(div, "compositionupdate", function (e) {
+    if (!this$1.composing) { this$1.composing = {data: e.data, done: false}; }
+  });
+  on(div, "compositionend", function (e) {
+    if (this$1.composing) {
+      if (e.data != this$1.composing.data) { this$1.readFromDOMSoon(); }
+      this$1.composing.done = true;
+    }
+  });
+
+  on(div, "touchstart", function () { return input.forceCompositionEnd(); });
+
+  on(div, "input", function () {
+    if (!this$1.composing) { this$1.readFromDOMSoon(); }
+  });
+
+  function onCopyCut(e) {
+    if (signalDOMEvent(cm, e)) { return }
+    if (cm.somethingSelected()) {
+      setLastCopied({lineWise: false, text: cm.getSelections()});
+      if (e.type == "cut") { cm.replaceSelection("", null, "cut"); }
+    } else if (!cm.options.lineWiseCopyCut) {
+      return
+    } else {
+      var ranges = copyableRanges(cm);
+      setLastCopied({lineWise: true, text: ranges.text});
+      if (e.type == "cut") {
+        cm.operation(function () {
+          cm.setSelections(ranges.ranges, 0, sel_dontScroll);
+          cm.replaceSelection("", null, "cut");
+        });
+      }
+    }
+    if (e.clipboardData) {
+      e.clipboardData.clearData();
+      var content = lastCopied.text.join("\n");
+      // iOS exposes the clipboard API, but seems to discard content inserted into it
+      e.clipboardData.setData("Text", content);
+      if (e.clipboardData.getData("Text") == content) {
+        e.preventDefault();
+        return
+      }
+    }
+    // Old-fashioned briefly-focus-a-textarea hack
+    var kludge = hiddenTextarea(), te = kludge.firstChild;
+    cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild);
+    te.value = lastCopied.text.join("\n");
+    var hadFocus = document.activeElement;
+    selectInput(te);
+    setTimeout(function () {
+      cm.display.lineSpace.removeChild(kludge);
+      hadFocus.focus();
+      if (hadFocus == div) { input.showPrimarySelection(); }
+    }, 50);
+  }
+  on(div, "copy", onCopyCut);
+  on(div, "cut", onCopyCut);
+};
+
+ContentEditableInput.prototype.prepareSelection = function () {
+  var result = prepareSelection(this.cm, false);
+  result.focus = this.cm.state.focused;
+  return result
+};
+
+ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
+  if (!info || !this.cm.display.view.length) { return }
+  if (info.focus || takeFocus) { this.showPrimarySelection(); }
+  this.showMultipleSelections(info);
+};
+
+ContentEditableInput.prototype.showPrimarySelection = function () {
+  var sel = window.getSelection(), cm = this.cm, prim = cm.doc.sel.primary();
+  var from = prim.from(), to = prim.to();
+
+  if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
+    sel.removeAllRanges();
+    return
+  }
+
+  var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
+  var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset);
+  if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
+      cmp(minPos(curAnchor, curFocus), from) == 0 &&
+      cmp(maxPos(curAnchor, curFocus), to) == 0)
+    { return }
+
+  var view = cm.display.view;
+  var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
+      {node: view[0].measure.map[2], offset: 0};
+  var end = to.line < cm.display.viewTo && posToDOM(cm, to);
+  if (!end) {
+    var measure = view[view.length - 1].measure;
+    var map$$1 = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map;
+    end = {node: map$$1[map$$1.length - 1], offset: map$$1[map$$1.length - 2] - map$$1[map$$1.length - 3]};
+  }
+
+  if (!start || !end) {
+    sel.removeAllRanges();
+    return
+  }
+
+  var old = sel.rangeCount && sel.getRangeAt(0), rng;
+  try { rng = range(start.node, start.offset, end.offset, end.node); }
+  catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
+  if (rng) {
+    if (!gecko && cm.state.focused) {
+      sel.collapse(start.node, start.offset);
+      if (!rng.collapsed) {
+        sel.removeAllRanges();
+        sel.addRange(rng);
+      }
+    } else {
+      sel.removeAllRanges();
+      sel.addRange(rng);
+    }
+    if (old && sel.anchorNode == null) { sel.addRange(old); }
+    else if (gecko) { this.startGracePeriod(); }
+  }
+  this.rememberSelection();
+};
+
+ContentEditableInput.prototype.startGracePeriod = function () {
+    var this$1 = this;
+
+  clearTimeout(this.gracePeriod);
+  this.gracePeriod = setTimeout(function () {
+    this$1.gracePeriod = false;
+    if (this$1.selectionChanged())
+      { this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }); }
+  }, 20);
+};
+
+ContentEditableInput.prototype.showMultipleSelections = function (info) {
+  removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors);
+  removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection);
+};
+
+ContentEditableInput.prototype.rememberSelection = function () {
+  var sel = window.getSelection();
+  this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset;
+  this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset;
+};
+
+ContentEditableInput.prototype.selectionInEditor = function () {
+  var sel = window.getSelection();
+  if (!sel.rangeCount) { return false }
+  var node = sel.getRangeAt(0).commonAncestorContainer;
+  return contains(this.div, node)
+};
+
+ContentEditableInput.prototype.focus = function () {
+  if (this.cm.options.readOnly != "nocursor") {
+    if (!this.selectionInEditor())
+      { this.showSelection(this.prepareSelection(), true); }
+    this.div.focus();
+  }
+};
+ContentEditableInput.prototype.blur = function () { this.div.blur(); };
+ContentEditableInput.prototype.getField = function () { return this.div };
+
+ContentEditableInput.prototype.supportsTouch = function () { return true };
+
+ContentEditableInput.prototype.receivedFocus = function () {
+  var input = this;
+  if (this.selectionInEditor())
+    { this.pollSelection(); }
+  else
+    { runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }); }
+
+  function poll() {
+    if (input.cm.state.focused) {
+      input.pollSelection();
+      input.polling.set(input.cm.options.pollInterval, poll);
+    }
+  }
+  this.polling.set(this.cm.options.pollInterval, poll);
+};
+
+ContentEditableInput.prototype.selectionChanged = function () {
+  var sel = window.getSelection();
+  return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
+    sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
+};
+
+ContentEditableInput.prototype.pollSelection = function () {
+  if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
+  var sel = window.getSelection(), cm = this.cm;
+  // On Android Chrome (version 56, at least), backspacing into an
+  // uneditable block element will put the cursor in that element,
+  // and then, because it's not editable, hide the virtual keyboard.
+  // Because Android doesn't allow us to actually detect backspace
+  // presses in a sane way, this code checks for when that happens
+  // and simulates a backspace press in this case.
+  if (android && chrome && this.cm.options.gutters.length && isInGutter(sel.anchorNode)) {
+    this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs});
+    this.blur();
+    this.focus();
+    return
+  }
+  if (this.composing) { return }
+  this.rememberSelection();
+  var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
+  var head = domToPos(cm, sel.focusNode, sel.focusOffset);
+  if (anchor && head) { runInOp(cm, function () {
+    setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll);
+    if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true; }
+  }); }
+};
+
+ContentEditableInput.prototype.pollContent = function () {
+  if (this.readDOMTimeout != null) {
+    clearTimeout(this.readDOMTimeout);
+    this.readDOMTimeout = null;
+  }
+
+  var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary();
+  var from = sel.from(), to = sel.to();
+  if (from.ch == 0 && from.line > cm.firstLine())
+    { from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length); }
+  if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
+    { to = Pos(to.line + 1, 0); }
+  if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }
+
+  var fromIndex, fromLine, fromNode;
+  if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
+    fromLine = lineNo(display.view[0].line);
+    fromNode = display.view[0].node;
+  } else {
+    fromLine = lineNo(display.view[fromIndex].line);
+    fromNode = display.view[fromIndex - 1].node.nextSibling;
+  }
+  var toIndex = findViewIndex(cm, to.line);
+  var toLine, toNode;
+  if (toIndex == display.view.length - 1) {
+    toLine = display.viewTo - 1;
+    toNode = display.lineDiv.lastChild;
+  } else {
+    toLine = lineNo(display.view[toIndex + 1].line) - 1;
+    toNode = display.view[toIndex + 1].node.previousSibling;
+  }
+
+  if (!fromNode) { return false }
+  var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
+  var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
+  while (newText.length > 1 && oldText.length > 1) {
+    if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
+    else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; }
+    else { break }
+  }
+
+  var cutFront = 0, cutEnd = 0;
+  var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length);
+  while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
+    { ++cutFront; }
+  var newBot = lst(newText), oldBot = lst(oldText);
+  var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
+                           oldBot.length - (oldText.length == 1 ? cutFront : 0));
+  while (cutEnd < maxCutEnd &&
+         newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
+    { ++cutEnd; }
+  // Try to move start of change to start of selection if ambiguous
+  if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
+    while (cutFront && cutFront > from.ch &&
+           newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
+      cutFront--;
+      cutEnd++;
+    }
+  }
+
+  newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "");
+  newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "");
+
+  var chFrom = Pos(fromLine, cutFront);
+  var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0);
+  if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
+    replaceRange(cm.doc, newText, chFrom, chTo, "+input");
+    return true
+  }
+};
+
+ContentEditableInput.prototype.ensurePolled = function () {
+  this.forceCompositionEnd();
+};
+ContentEditableInput.prototype.reset = function () {
+  this.forceCompositionEnd();
+};
+ContentEditableInput.prototype.forceCompositionEnd = function () {
+  if (!this.composing) { return }
+  clearTimeout(this.readDOMTimeout);
+  this.composing = null;
+  this.updateFromDOM();
+  this.div.blur();
+  this.div.focus();
+};
+ContentEditableInput.prototype.readFromDOMSoon = function () {
+    var this$1 = this;
+
+  if (this.readDOMTimeout != null) { return }
+  this.readDOMTimeout = setTimeout(function () {
+    this$1.readDOMTimeout = null;
+    if (this$1.composing) {
+      if (this$1.composing.done) { this$1.composing = null; }
+      else { return }
+    }
+    this$1.updateFromDOM();
+  }, 80);
+};
+
+ContentEditableInput.prototype.updateFromDOM = function () {
+    var this$1 = this;
+
+  if (this.cm.isReadOnly() || !this.pollContent())
+    { runInOp(this.cm, function () { return regChange(this$1.cm); }); }
+};
+
+ContentEditableInput.prototype.setUneditable = function (node) {
+  node.contentEditable = "false";
+};
+
+ContentEditableInput.prototype.onKeyPress = function (e) {
+  if (e.charCode == 0) { return }
+  e.preventDefault();
+  if (!this.cm.isReadOnly())
+    { operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0); }
+};
+
+ContentEditableInput.prototype.readOnlyChanged = function (val) {
+  this.div.contentEditable = String(val != "nocursor");
+};
+
+ContentEditableInput.prototype.onContextMenu = function () {};
+ContentEditableInput.prototype.resetPosition = function () {};
+
+ContentEditableInput.prototype.needsContentAttribute = true;
+
+function posToDOM(cm, pos) {
+  var view = findViewForLine(cm, pos.line);
+  if (!view || view.hidden) { return null }
+  var line = getLine(cm.doc, pos.line);
+  var info = mapFromLineView(view, line, pos.line);
+
+  var order = getOrder(line, cm.doc.direction), side = "left";
+  if (order) {
+    var partPos = getBidiPartAt(order, pos.ch);
+    side = partPos % 2 ? "right" : "left";
+  }
+  var result = nodeAndOffsetInLineMap(info.map, pos.ch, side);
+  result.offset = result.collapse == "right" ? result.end : result.start;
+  return result
+}
+
+function isInGutter(node) {
+  for (var scan = node; scan; scan = scan.parentNode)
+    { if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
+  return false
+}
+
+function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }
+
+function domTextBetween(cm, from, to, fromLine, toLine) {
+  var text = "", closing = false, lineSep = cm.doc.lineSeparator();
+  function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
+  function close() {
+    if (closing) {
+      text += lineSep;
+      closing = false;
+    }
+  }
+  function addText(str) {
+    if (str) {
+      close();
+      text += str;
+    }
+  }
+  function walk(node) {
+    if (node.nodeType == 1) {
+      var cmText = node.getAttribute("cm-text");
+      if (cmText != null) {
+        addText(cmText || node.textContent.replace(/\u200b/g, ""));
+        return
+      }
+      var markerID = node.getAttribute("cm-marker"), range$$1;
+      if (markerID) {
+        var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
+        if (found.length && (range$$1 = found[0].find(0)))
+          { addText(getBetween(cm.doc, range$$1.from, range$$1.to).join(lineSep)); }
+        return
+      }
+      if (node.getAttribute("contenteditable") == "false") { return }
+      var isBlock = /^(pre|div|p)$/i.test(node.nodeName);
+      if (isBlock) { close(); }
+      for (var i = 0; i < node.childNodes.length; i++)
+        { walk(node.childNodes[i]); }
+      if (isBlock) { closing = true; }
+    } else if (node.nodeType == 3) {
+      addText(node.nodeValue);
+    }
+  }
+  for (;;) {
+    walk(from);
+    if (from == to) { break }
+    from = from.nextSibling;
+  }
+  return text
+}
+
+function domToPos(cm, node, offset) {
+  var lineNode;
+  if (node == cm.display.lineDiv) {
+    lineNode = cm.display.lineDiv.childNodes[offset];
+    if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
+    node = null; offset = 0;
+  } else {
+    for (lineNode = node;; lineNode = lineNode.parentNode) {
+      if (!lineNode || lineNode == cm.display.lineDiv) { return null }
+      if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
+    }
+  }
+  for (var i = 0; i < cm.display.view.length; i++) {
+    var lineView = cm.display.view[i];
+    if (lineView.node == lineNode)
+      { return locateNodeInLineView(lineView, node, offset) }
+  }
+}
+
+function locateNodeInLineView(lineView, node, offset) {
+  var wrapper = lineView.text.firstChild, bad = false;
+  if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
+  if (node == wrapper) {
+    bad = true;
+    node = wrapper.childNodes[offset];
+    offset = 0;
+    if (!node) {
+      var line = lineView.rest ? lst(lineView.rest) : lineView.line;
+      return badPos(Pos(lineNo(line), line.text.length), bad)
+    }
+  }
+
+  var textNode = node.nodeType == 3 ? node : null, topNode = node;
+  if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
+    textNode = node.firstChild;
+    if (offset) { offset = textNode.nodeValue.length; }
+  }
+  while (topNode.parentNode != wrapper) { topNode = topNode.parentNode; }
+  var measure = lineView.measure, maps = measure.maps;
+
+  function find(textNode, topNode, offset) {
+    for (var i = -1; i < (maps ? maps.length : 0); i++) {
+      var map$$1 = i < 0 ? measure.map : maps[i];
+      for (var j = 0; j < map$$1.length; j += 3) {
+        var curNode = map$$1[j + 2];
+        if (curNode == textNode || curNode == topNode) {
+          var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]);
+          var ch = map$$1[j] + offset;
+          if (offset < 0 || curNode != textNode) { ch = map$$1[j + (offset ? 1 : 0)]; }
+          return Pos(line, ch)
+        }
+      }
+    }
+  }
+  var found = find(textNode, topNode, offset);
+  if (found) { return badPos(found, bad) }
+
+  // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
+  for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
+    found = find(after, after.firstChild, 0);
+    if (found)
+      { return badPos(Pos(found.line, found.ch - dist), bad) }
+    else
+      { dist += after.textContent.length; }
+  }
+  for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
+    found = find(before, before.firstChild, -1);
+    if (found)
+      { return badPos(Pos(found.line, found.ch + dist$1), bad) }
+    else
+      { dist$1 += before.textContent.length; }
+  }
+}
+
+// TEXTAREA INPUT STYLE
+
+var TextareaInput = function(cm) {
+  this.cm = cm;
+  // See input.poll and input.reset
+  this.prevInput = "";
+
+  // Flag that indicates whether we expect input to appear real soon
+  // now (after some event like 'keypress' or 'input') and are
+  // polling intensively.
+  this.pollingFast = false;
+  // Self-resetting timeout for the poller
+  this.polling = new Delayed();
+  // Used to work around IE issue with selection being forgotten when focus moves away from textarea
+  this.hasSelection = false;
+  this.composing = null;
+};
+
+TextareaInput.prototype.init = function (display) {
+    var this$1 = this;
+
+  var input = this, cm = this.cm;
+
+  // Wraps and hides input textarea
+  var div = this.wrapper = hiddenTextarea();
+  // The semihidden textarea that is focused when the editor is
+  // focused, and receives input.
+  var te = this.textarea = div.firstChild;
+  display.wrapper.insertBefore(div, display.wrapper.firstChild);
+
+  // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
+  if (ios) { te.style.width = "0px"; }
+
+  on(te, "input", function () {
+    if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null; }
+    input.poll();
+  });
+
+  on(te, "paste", function (e) {
+    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+
+    cm.state.pasteIncoming = true;
+    input.fastPoll();
+  });
+
+  function prepareCopyCut(e) {
+    if (signalDOMEvent(cm, e)) { return }
+    if (cm.somethingSelected()) {
+      setLastCopied({lineWise: false, text: cm.getSelections()});
+    } else if (!cm.options.lineWiseCopyCut) {
+      return
+    } else {
+      var ranges = copyableRanges(cm);
+      setLastCopied({lineWise: true, text: ranges.text});
+      if (e.type == "cut") {
+        cm.setSelections(ranges.ranges, null, sel_dontScroll);
+      } else {
+        input.prevInput = "";
+        te.value = ranges.text.join("\n");
+        selectInput(te);
+      }
+    }
+    if (e.type == "cut") { cm.state.cutIncoming = true; }
+  }
+  on(te, "cut", prepareCopyCut);
+  on(te, "copy", prepareCopyCut);
+
+  on(display.scroller, "paste", function (e) {
+    if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
+    cm.state.pasteIncoming = true;
+    input.focus();
+  });
+
+  // Prevent normal selection in the editor (we handle our own)
+  on(display.lineSpace, "selectstart", function (e) {
+    if (!eventInWidget(display, e)) { e_preventDefault(e); }
+  });
+
+  on(te, "compositionstart", function () {
+    var start = cm.getCursor("from");
+    if (input.composing) { input.composing.range.clear(); }
+    input.composing = {
+      start: start,
+      range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
+    };
+  });
+  on(te, "compositionend", function () {
+    if (input.composing) {
+      input.poll();
+      input.composing.range.clear();
+      input.composing = null;
+    }
+  });
+};
+
+TextareaInput.prototype.prepareSelection = function () {
+  // Redraw the selection and/or cursor
+  var cm = this.cm, display = cm.display, doc = cm.doc;
+  var result = prepareSelection(cm);
+
+  // Move the hidden textarea near the cursor to prevent scrolling artifacts
+  if (cm.options.moveInputWithCursor) {
+    var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
+    var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
+    result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
+                                        headPos.top + lineOff.top - wrapOff.top));
+    result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
+                                         headPos.left + lineOff.left - wrapOff.left));
+  }
+
+  return result
+};
+
+TextareaInput.prototype.showSelection = function (drawn) {
+  var cm = this.cm, display = cm.display;
+  removeChildrenAndAdd(display.cursorDiv, drawn.cursors);
+  removeChildrenAndAdd(display.selectionDiv, drawn.selection);
+  if (drawn.teTop != null) {
+    this.wrapper.style.top = drawn.teTop + "px";
+    this.wrapper.style.left = drawn.teLeft + "px";
+  }
+};
+
+// Reset the input to correspond to the selection (or to be empty,
+// when not typing and nothing is selected)
+TextareaInput.prototype.reset = function (typing) {
+  if (this.contextMenuPending || this.composing) { return }
+  var cm = this.cm;
+  if (cm.somethingSelected()) {
+    this.prevInput = "";
+    var content = cm.getSelection();
+    this.textarea.value = content;
+    if (cm.state.focused) { selectInput(this.textarea); }
+    if (ie && ie_version >= 9) { this.hasSelection = content; }
+  } else if (!typing) {
+    this.prevInput = this.textarea.value = "";
+    if (ie && ie_version >= 9) { this.hasSelection = null; }
+  }
+};
+
+TextareaInput.prototype.getField = function () { return this.textarea };
+
+TextareaInput.prototype.supportsTouch = function () { return false };
+
+TextareaInput.prototype.focus = function () {
+  if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
+    try { this.textarea.focus(); }
+    catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
+  }
+};
+
+TextareaInput.prototype.blur = function () { this.textarea.blur(); };
+
+TextareaInput.prototype.resetPosition = function () {
+  this.wrapper.style.top = this.wrapper.style.left = 0;
+};
+
+TextareaInput.prototype.receivedFocus = function () { this.slowPoll(); };
+
+// Poll for input changes, using the normal rate of polling. This
+// runs as long as the editor is focused.
+TextareaInput.prototype.slowPoll = function () {
+    var this$1 = this;
+
+  if (this.pollingFast) { return }
+  this.polling.set(this.cm.options.pollInterval, function () {
+    this$1.poll();
+    if (this$1.cm.state.focused) { this$1.slowPoll(); }
+  });
+};
+
+// When an event has just come in that is likely to add or change
+// something in the input textarea, we poll faster, to ensure that
+// the change appears on the screen quickly.
+TextareaInput.prototype.fastPoll = function () {
+  var missed = false, input = this;
+  input.pollingFast = true;
+  function p() {
+    var changed = input.poll();
+    if (!changed && !missed) {missed = true; input.polling.set(60, p);}
+    else {input.pollingFast = false; input.slowPoll();}
+  }
+  input.polling.set(20, p);
+};
+
+// Read input from the textarea, and update the document to match.
+// When something is selected, it is present in the textarea, and
+// selected (unless it is huge, in which case a placeholder is
+// used). When nothing is selected, the cursor sits after previously
+// seen text (can be empty), which is stored in prevInput (we must
+// not reset the textarea when typing, because that breaks IME).
+TextareaInput.prototype.poll = function () {
+    var this$1 = this;
+
+  var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
+  // Since this is called a *lot*, try to bail out as cheaply as
+  // possible when it is clear that nothing happened. hasSelection
+  // will be the case when there is a lot of text in the textarea,
+  // in which case reading its value would be expensive.
+  if (this.contextMenuPending || !cm.state.focused ||
+      (hasSelection(input) && !prevInput && !this.composing) ||
+      cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
+    { return false }
+
+  var text = input.value;
+  // If nothing changed, bail.
+  if (text == prevInput && !cm.somethingSelected()) { return false }
+  // Work around nonsensical selection resetting in IE9/10, and
+  // inexplicable appearance of private area unicode characters on
+  // some key combos in Mac (#2689).
+  if (ie && ie_version >= 9 && this.hasSelection === text ||
+      mac && /[\uf700-\uf7ff]/.test(text)) {
+    cm.display.input.reset();
+    return false
+  }
+
+  if (cm.doc.sel == cm.display.selForContextMenu) {
+    var first = text.charCodeAt(0);
+    if (first == 0x200b && !prevInput) { prevInput = "\u200b"; }
+    if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
+  }
+  // Find the part of the input that is actually new
+  var same = 0, l = Math.min(prevInput.length, text.length);
+  while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same; }
+
+  runInOp(cm, function () {
+    applyTextInput(cm, text.slice(same), prevInput.length - same,
+                   null, this$1.composing ? "*compose" : null);
+
+    // Don't leave long text in the textarea, since it makes further polling slow
+    if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = ""; }
+    else { this$1.prevInput = text; }
+
+    if (this$1.composing) {
+      this$1.composing.range.clear();
+      this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
+                                         {className: "CodeMirror-composing"});
+    }
+  });
+  return true
+};
+
+TextareaInput.prototype.ensurePolled = function () {
+  if (this.pollingFast && this.poll()) { this.pollingFast = false; }
+};
+
+TextareaInput.prototype.onKeyPress = function () {
+  if (ie && ie_version >= 9) { this.hasSelection = null; }
+  this.fastPoll();
+};
+
+TextareaInput.prototype.onContextMenu = function (e) {
+  var input = this, cm = input.cm, display = cm.display, te = input.textarea;
+  var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
+  if (!pos || presto) { return } // Opera is difficult.
+
+  // Reset the current text selection only if the click is done outside of the selection
+  // and 'resetSelectionOnContextMenu' option is true.
+  var reset = cm.options.resetSelectionOnContextMenu;
+  if (reset && cm.doc.sel.contains(pos) == -1)
+    { operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll); }
+
+  var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText;
+  input.wrapper.style.cssText = "position: absolute";
+  var wrapperBox = input.wrapper.getBoundingClientRect();
+  te.style.cssText = "position: absolute; width: 30px; height: 30px;\n      top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 5) + "px;\n      z-index: 1000; background: " + (ie ? "rgba(255, 255, 255, .05)" : "transparent") + ";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
+  var oldScrollY;
+  if (webkit) { oldScrollY = window.scrollY; } // Work around Chrome issue (#2712)
+  display.input.focus();
+  if (webkit) { window.scrollTo(null, oldScrollY); }
+  display.input.reset();
+  // Adds "Select all" to context menu in FF
+  if (!cm.somethingSelected()) { te.value = input.prevInput = " "; }
+  input.contextMenuPending = true;
+  display.selForContextMenu = cm.doc.sel;
+  clearTimeout(display.detectingSelectAll);
+
+  // Select-all will be greyed out if there's nothing to select, so
+  // this adds a zero-width space so that we can later check whether
+  // it got selected.
+  function prepareSelectAllHack() {
+    if (te.selectionStart != null) {
+      var selected = cm.somethingSelected();
+      var extval = "\u200b" + (selected ? te.value : "");
+      te.value = "\u21da"; // Used to catch context-menu undo
+      te.value = extval;
+      input.prevInput = selected ? "" : "\u200b";
+      te.selectionStart = 1; te.selectionEnd = extval.length;
+      // Re-set this, in case some other handler touched the
+      // selection in the meantime.
+      display.selForContextMenu = cm.doc.sel;
+    }
+  }
+  function rehide() {
+    input.contextMenuPending = false;
+    input.wrapper.style.cssText = oldWrapperCSS;
+    te.style.cssText = oldCSS;
+    if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos); }
+
+    // Try to detect the user choosing select-all
+    if (te.selectionStart != null) {
+      if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack(); }
+      var i = 0, poll = function () {
+        if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
+            te.selectionEnd > 0 && input.prevInput == "\u200b") {
+          operation(cm, selectAll)(cm);
+        } else if (i++ < 10) {
+          display.detectingSelectAll = setTimeout(poll, 500);
+        } else {
+          display.selForContextMenu = null;
+          display.input.reset();
+        }
+      };
+      display.detectingSelectAll = setTimeout(poll, 200);
+    }
+  }
+
+  if (ie && ie_version >= 9) { prepareSelectAllHack(); }
+  if (captureRightClick) {
+    e_stop(e);
+    var mouseup = function () {
+      off(window, "mouseup", mouseup);
+      setTimeout(rehide, 20);
+    };
+    on(window, "mouseup", mouseup);
+  } else {
+    setTimeout(rehide, 50);
+  }
+};
+
+TextareaInput.prototype.readOnlyChanged = function (val) {
+  if (!val) { this.reset(); }
+  this.textarea.disabled = val == "nocursor";
+};
+
+TextareaInput.prototype.setUneditable = function () {};
+
+TextareaInput.prototype.needsContentAttribute = false;
+
+function fromTextArea(textarea, options) {
+  options = options ? copyObj(options) : {};
+  options.value = textarea.value;
+  if (!options.tabindex && textarea.tabIndex)
+    { options.tabindex = textarea.tabIndex; }
+  if (!options.placeholder && textarea.placeholder)
+    { options.placeholder = textarea.placeholder; }
+  // Set autofocus to true if this textarea is focused, or if it has
+  // autofocus and no other element is focused.
+  if (options.autofocus == null) {
+    var hasFocus = activeElt();
+    options.autofocus = hasFocus == textarea ||
+      textarea.getAttribute("autofocus") != null && hasFocus == document.body;
+  }
+
+  function save() {textarea.value = cm.getValue();}
+
+  var realSubmit;
+  if (textarea.form) {
+    on(textarea.form, "submit", save);
+    // Deplorable hack to make the submit method do the right thing.
+    if (!options.leaveSubmitMethodAlone) {
+      var form = textarea.form;
+      realSubmit = form.submit;
+      try {
+        var wrappedSubmit = form.submit = function () {
+          save();
+          form.submit = realSubmit;
+          form.submit();
+          form.submit = wrappedSubmit;
+        };
+      } catch(e) {}
+    }
+  }
+
+  options.finishInit = function (cm) {
+    cm.save = save;
+    cm.getTextArea = function () { return textarea; };
+    cm.toTextArea = function () {
+      cm.toTextArea = isNaN; // Prevent this from being ran twice
+      save();
+      textarea.parentNode.removeChild(cm.getWrapperElement());
+      textarea.style.display = "";
+      if (textarea.form) {
+        off(textarea.form, "submit", save);
+        if (typeof textarea.form.submit == "function")
+          { textarea.form.submit = realSubmit; }
+      }
+    };
+  };
+
+  textarea.style.display = "none";
+  var cm = CodeMirror$1(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
+    options);
+  return cm
+}
+
+function addLegacyProps(CodeMirror) {
+  CodeMirror.off = off;
+  CodeMirror.on = on;
+  CodeMirror.wheelEventPixels = wheelEventPixels;
+  CodeMirror.Doc = Doc;
+  CodeMirror.splitLines = splitLinesAuto;
+  CodeMirror.countColumn = countColumn;
+  CodeMirror.findColumn = findColumn;
+  CodeMirror.isWordChar = isWordCharBasic;
+  CodeMirror.Pass = Pass;
+  CodeMirror.signal = signal;
+  CodeMirror.Line = Line;
+  CodeMirror.changeEnd = changeEnd;
+  CodeMirror.scrollbarModel = scrollbarModel;
+  CodeMirror.Pos = Pos;
+  CodeMirror.cmpPos = cmp;
+  CodeMirror.modes = modes;
+  CodeMirror.mimeModes = mimeModes;
+  CodeMirror.resolveMode = resolveMode;
+  CodeMirror.getMode = getMode;
+  CodeMirror.modeExtensions = modeExtensions;
+  CodeMirror.extendMode = extendMode;
+  CodeMirror.copyState = copyState;
+  CodeMirror.startState = startState;
+  CodeMirror.innerMode = innerMode;
+  CodeMirror.commands = commands;
+  CodeMirror.keyMap = keyMap;
+  CodeMirror.keyName = keyName;
+  CodeMirror.isModifierKey = isModifierKey;
+  CodeMirror.lookupKey = lookupKey;
+  CodeMirror.normalizeKeyMap = normalizeKeyMap;
+  CodeMirror.StringStream = StringStream;
+  CodeMirror.SharedTextMarker = SharedTextMarker;
+  CodeMirror.TextMarker = TextMarker;
+  CodeMirror.LineWidget = LineWidget;
+  CodeMirror.e_preventDefault = e_preventDefault;
+  CodeMirror.e_stopPropagation = e_stopPropagation;
+  CodeMirror.e_stop = e_stop;
+  CodeMirror.addClass = addClass;
+  CodeMirror.contains = contains;
+  CodeMirror.rmClass = rmClass;
+  CodeMirror.keyNames = keyNames;
+}
+
+// EDITOR CONSTRUCTOR
+
+defineOptions(CodeMirror$1);
+
+addEditorMethods(CodeMirror$1);
+
+// Set up methods on CodeMirror's prototype to redirect to the editor's document.
+var dontDelegate = "iter insert remove copy getEditor constructor".split(" ");
+for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
+  { CodeMirror$1.prototype[prop] = (function(method) {
+    return function() {return method.apply(this.doc, arguments)}
+  })(Doc.prototype[prop]); } }
+
+eventMixin(Doc);
+
+// INPUT HANDLING
+
+CodeMirror$1.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput};
+
+// MODE DEFINITION AND QUERYING
+
+// Extra arguments are stored as the mode's dependencies, which is
+// used by (legacy) mechanisms like loadmode.js to automatically
+// load a mode. (Preferred mechanism is the require/define calls.)
+CodeMirror$1.defineMode = function(name/*, mode, âŠ*/) {
+  if (!CodeMirror$1.defaults.mode && name != "null") { CodeMirror$1.defaults.mode = name; }
+  defineMode.apply(this, arguments);
+};
+
+CodeMirror$1.defineMIME = defineMIME;
+
+// Minimal default mode.
+CodeMirror$1.defineMode("null", function () { return ({token: function (stream) { return stream.skipToEnd(); }}); });
+CodeMirror$1.defineMIME("text/plain", "null");
+
+// EXTENSIONS
+
+CodeMirror$1.defineExtension = function (name, func) {
+  CodeMirror$1.prototype[name] = func;
+};
+CodeMirror$1.defineDocExtension = function (name, func) {
+  Doc.prototype[name] = func;
+};
+
+CodeMirror$1.fromTextArea = fromTextArea;
+
+addLegacyProps(CodeMirror$1);
+
+CodeMirror$1.version = "5.31.0";
+
+return CodeMirror$1;
+
+})));
+
+},{}],3:[function(require,module,exports){
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// mode(s) for the sequence chart dsl's mscgen, xÃ¹ and msgenny
+// For more information on mscgen, see the site of the original author:
+// http://www.mcternan.me.uk/mscgen
+//
+// This mode for mscgen and the two derivative languages were
+// originally made for use in the mscgen_js interpreter
+// (https://sverweij.github.io/mscgen_js)
+
+(function(mod) {
+  if ( typeof exports == "object" && typeof module == "object")// CommonJS
+    mod(require("../../lib/codemirror"));
+  else if ( typeof define == "function" && define.amd)// AMD
+    define(["../../lib/codemirror"], mod);
+  else// Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  var languages = {
+    "fcs-ql": {
+      "keywords" : ["msc"],
+      "options" : ["hscale", "width", "arcgradient", "wordwraparcs"],
+      "constants" : ["true", "false", "on", "off"],
+      "attributes" : ["text", "lemma", "word", "pos", ""],
+      "brackets" : ["\\{", "\\}"], // [ and  ] are brackets too, but these get handled in with lists
+      "arcsWords" : ["note", "abox", "rbox", "box"],
+      "arcsOthers" : ["\\|\\|\\|", "\\.\\.\\.", "---", "--", "<->", "==", "<<=>>", "<=>", "\\.\\.", "<<>>", "::", "<:>", "->", "=>>", "=>", ">>", ":>", "<-", "<<=", "<=", "<<", "<:", "x-", "-x"],
+      "singlecomment" : ["//", "#"],
+      "operators" : ["=", "!=", "contains"]
+    }
+  }
+
+  CodeMirror.defineMode("fcs-ql", function(_, modeConfig) {
+    var language = languages[modeConfig && modeConfig.language || "fcs-ql"]
+    return {
+      startState: startStateFn,
+      copyState: copyStateFn,
+      token: produceTokenFunction(language),
+      lineComment : "#",
+      blockCommentStart : "/*",
+      blockCommentEnd : "*/"
+    };
+  });
+
+  CodeMirror.defineMIME("text/x-fcs-ql", "fcs-ql");
+
+  function wordRegexpBoundary(pWords) {
+    return new RegExp("\\b(" + pWords.join("|") + ")\\b", "i");
+  }
+
+  function wordRegexp(pWords) {
+    return new RegExp("(" + pWords.join("|") + ")", "i");
+  }
+
+  function startStateFn() {
+    return {
+      inComment : false,
+      inString : false,
+      inAttributeList : false,
+      inScript : false
+    };
+  }
+
+  function copyStateFn(pState) {
+    return {
+      inComment : pState.inComment,
+      inString : pState.inString,
+      inAttributeList : pState.inAttributeList,
+      inScript : pState.inScript
+    };
+  }
+
+  function produceTokenFunction(pConfig) {
+
+    return function(pStream, pState) {
+      if (pStream.match(wordRegexp(pConfig.brackets), true, true)) {
+        return "bracket";
+      }
+      /* comments */
+      if (!pState.inComment) {
+        if (pStream.match(/\/\*[^\*\/]*/, true, true)) {
+          pState.inComment = true;
+          return "comment";
+        }
+        if (pStream.match(wordRegexp(pConfig.singlecomment), true, true)) {
+          pStream.skipToEnd();
+          return "comment";
+        }
+      }
+      if (pState.inComment) {
+        if (pStream.match(/[^\*\/]*\*\//, true, true))
+          pState.inComment = false;
+        else
+          pStream.skipToEnd();
+        return "comment";
+      }
+      /* strings */
+      if (!pState.inString && pStream.match(/\"(\\\"|[^\"])*/, true, true)) {
+        pState.inString = true;
+        return "string";
+      }
+      if (pState.inString) {
+        if (pStream.match(/[^\"]*\"/, true, true))
+          pState.inString = false;
+        else
+          pStream.skipToEnd();
+        return "string";
+      }
+      /* keywords & operators */
+      if (!!pConfig.keywords && pStream.match(wordRegexpBoundary(pConfig.keywords), true, true))
+        return "keyword";
+
+      if (pStream.match(wordRegexpBoundary(pConfig.options), true, true))
+        return "keyword";
+
+      if (pStream.match(wordRegexpBoundary(pConfig.arcsWords), true, true))
+        return "keyword";
+
+      if (pStream.match(wordRegexp(pConfig.arcsOthers), true, true))
+        return "keyword";
+
+      if (!!pConfig.operators && pStream.match(wordRegexp(pConfig.operators), true, true))
+        return "operator";
+
+      if (!!pConfig.constants && pStream.match(wordRegexp(pConfig.constants), true, true))
+        return "variable";
+
+      /* attribute lists */
+      if (!pConfig.inAttributeList && !!pConfig.attributes && pStream.match(/\[/, true, true)) {
+        pConfig.inAttributeList = true;
+        return "bracket";
+      }
+      if (pConfig.inAttributeList) {
+        if (pConfig.attributes !== null && pStream.match(wordRegexpBoundary(pConfig.attributes), true, true)) {
+          return "attribute";
+        }
+        if (pStream.match(/]/, true, true)) {
+          pConfig.inAttributeList = false;
+          return "bracket";
+        }
+      }
+
+      pStream.next();
+      return "base";
+    };
+  }
+
+});
+
+},{"../../lib/codemirror":2}],4:[function(require,module,exports){
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+"use strict";
+
+CodeMirror.defineMode("javascript", function(config, parserConfig) {
+  var indentUnit = config.indentUnit;
+  var statementIndent = parserConfig.statementIndent;
+  var jsonldMode = parserConfig.jsonld;
+  var jsonMode = parserConfig.json || jsonldMode;
+  var isTS = parserConfig.typescript;
+  var wordRE = parserConfig.wordCharacters || /[\w$\xa1-\uffff]/;
+
+  // Tokenizer
+
+  var keywords = function(){
+    function kw(type) {return {type: type, style: "keyword"};}
+    var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c"), D = kw("keyword d");
+    var operator = kw("operator"), atom = {type: "atom", style: "atom"};
+
+    var jsKeywords = {
+      "if": kw("if"), "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,
+      "return": D, "break": D, "continue": D, "new": kw("new"), "delete": C, "void": C, "throw": C,
+      "debugger": kw("debugger"), "var": kw("var"), "const": kw("var"), "let": kw("var"),
+      "function": kw("function"), "catch": kw("catch"),
+      "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
+      "in": operator, "typeof": operator, "instanceof": operator,
+      "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
+      "this": kw("this"), "class": kw("class"), "super": kw("atom"),
+      "yield": C, "export": kw("export"), "import": kw("import"), "extends": C,
+      "await": C
+    };
+
+    // Extend the 'normal' keywords with the TypeScript language extensions
+    if (isTS) {
+      var type = {type: "variable", style: "type"};
+      var tsKeywords = {
+        // object-like things
+        "interface": kw("class"),
+        "implements": C,
+        "namespace": C,
+        "module": kw("module"),
+        "enum": kw("module"),
+
+        // scope modifiers
+        "public": kw("modifier"),
+        "private": kw("modifier"),
+        "protected": kw("modifier"),
+        "abstract": kw("modifier"),
+        "readonly": kw("modifier"),
+
+        // types
+        "string": type, "number": type, "boolean": type, "any": type
+      };
+
+      for (var attr in tsKeywords) {
+        jsKeywords[attr] = tsKeywords[attr];
+      }
+    }
+
+    return jsKeywords;
+  }();
+
+  var isOperatorChar = /[+\-*&%=<>!?|~^@]/;
+  var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;
+
+  function readRegexp(stream) {
+    var escaped = false, next, inSet = false;
+    while ((next = stream.next()) != null) {
+      if (!escaped) {
+        if (next == "/" && !inSet) return;
+        if (next == "[") inSet = true;
+        else if (inSet && next == "]") inSet = false;
+      }
+      escaped = !escaped && next == "\\";
+    }
+  }
+
+  // Used as scratch variables to communicate multiple values without
+  // consing up tons of objects.
+  var type, content;
+  function ret(tp, style, cont) {
+    type = tp; content = cont;
+    return style;
+  }
+  function tokenBase(stream, state) {
+    var ch = stream.next();
+    if (ch == '"' || ch == "'") {
+      state.tokenize = tokenString(ch);
+      return state.tokenize(stream, state);
+    } else if (ch == "." && stream.match(/^\d+(?:[eE][+\-]?\d+)?/)) {
+      return ret("number", "number");
+    } else if (ch == "." && stream.match("..")) {
+      return ret("spread", "meta");
+    } else if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
+      return ret(ch);
+    } else if (ch == "=" && stream.eat(">")) {
+      return ret("=>", "operator");
+    } else if (ch == "0" && stream.eat(/x/i)) {
+      stream.eatWhile(/[\da-f]/i);
+      return ret("number", "number");
+    } else if (ch == "0" && stream.eat(/o/i)) {
+      stream.eatWhile(/[0-7]/i);
+      return ret("number", "number");
+    } else if (ch == "0" && stream.eat(/b/i)) {
+      stream.eatWhile(/[01]/i);
+      return ret("number", "number");
+    } else if (/\d/.test(ch)) {
+      stream.match(/^\d*(?:\.\d*)?(?:[eE][+\-]?\d+)?/);
+      return ret("number", "number");
+    } else if (ch == "/") {
+      if (stream.eat("*")) {
+        state.tokenize = tokenComment;
+        return tokenComment(stream, state);
+      } else if (stream.eat("/")) {
+        stream.skipToEnd();
+        return ret("comment", "comment");
+      } else if (expressionAllowed(stream, state, 1)) {
+        readRegexp(stream);
+        stream.match(/^\b(([gimyu])(?![gimyu]*\2))+\b/);
+        return ret("regexp", "string-2");
+      } else {
+        stream.eat("=");
+        return ret("operator", "operator", stream.current());
+      }
+    } else if (ch == "`") {
+      state.tokenize = tokenQuasi;
+      return tokenQuasi(stream, state);
+    } else if (ch == "#") {
+      stream.skipToEnd();
+      return ret("error", "error");
+    } else if (isOperatorChar.test(ch)) {
+      if (ch != ">" || !state.lexical || state.lexical.type != ">") {
+        if (stream.eat("=")) {
+          if (ch == "!" || ch == "=") stream.eat("=")
+        } else if (/[<>*+\-]/.test(ch)) {
+          stream.eat(ch)
+          if (ch == ">") stream.eat(ch)
+        }
+      }
+      return ret("operator", "operator", stream.current());
+    } else if (wordRE.test(ch)) {
+      stream.eatWhile(wordRE);
+      var word = stream.current()
+      if (state.lastType != ".") {
+        if (keywords.propertyIsEnumerable(word)) {
+          var kw = keywords[word]
+          return ret(kw.type, kw.style, word)
+        }
+        if (word == "async" && stream.match(/^\s*[\(\w]/, false))
+          return ret("async", "keyword", word)
+      }
+      return ret("variable", "variable", word)
+    }
+  }
+
+  function tokenString(quote) {
+    return function(stream, state) {
+      var escaped = false, next;
+      if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
+        state.tokenize = tokenBase;
+        return ret("jsonld-keyword", "meta");
+      }
+      while ((next = stream.next()) != null) {
+        if (next == quote && !escaped) break;
+        escaped = !escaped && next == "\\";
+      }
+      if (!escaped) state.tokenize = tokenBase;
+      return ret("string", "string");
+    };
+  }
+
+  function tokenComment(stream, state) {
+    var maybeEnd = false, ch;
+    while (ch = stream.next()) {
+      if (ch == "/" && maybeEnd) {
+        state.tokenize = tokenBase;
+        break;
+      }
+      maybeEnd = (ch == "*");
+    }
+    return ret("comment", "comment");
+  }
+
+  function tokenQuasi(stream, state) {
+    var escaped = false, next;
+    while ((next = stream.next()) != null) {
+      if (!escaped && (next == "`" || next == "$" && stream.eat("{"))) {
+        state.tokenize = tokenBase;
+        break;
+      }
+      escaped = !escaped && next == "\\";
+    }
+    return ret("quasi", "string-2", stream.current());
+  }
+
+  var brackets = "([{}])";
+  // This is a crude lookahead trick to try and notice that we're
+  // parsing the argument patterns for a fat-arrow function before we
+  // actually hit the arrow token. It only works if the arrow is on
+  // the same line as the arguments and there's no strange noise
+  // (comments) in between. Fallback is to only notice when we hit the
+  // arrow, and not declare the arguments as locals for the arrow
+  // body.
+  function findFatArrow(stream, state) {
+    if (state.fatArrowAt) state.fatArrowAt = null;
+    var arrow = stream.string.indexOf("=>", stream.start);
+    if (arrow < 0) return;
+
+    if (isTS) { // Try to skip TypeScript return type declarations after the arguments
+      var m = /:\s*(?:\w+(?:<[^>]*>|\[\])?|\{[^}]*\})\s*$/.exec(stream.string.slice(stream.start, arrow))
+      if (m) arrow = m.index
+    }
+
+    var depth = 0, sawSomething = false;
+    for (var pos = arrow - 1; pos >= 0; --pos) {
+      var ch = stream.string.charAt(pos);
+      var bracket = brackets.indexOf(ch);
+      if (bracket >= 0 && bracket < 3) {
+        if (!depth) { ++pos; break; }
+        if (--depth == 0) { if (ch == "(") sawSomething = true; break; }
+      } else if (bracket >= 3 && bracket < 6) {
+        ++depth;
+      } else if (wordRE.test(ch)) {
+        sawSomething = true;
+      } else if (/["'\/]/.test(ch)) {
+        return;
+      } else if (sawSomething && !depth) {
+        ++pos;
+        break;
+      }
+    }
+    if (sawSomething && !depth) state.fatArrowAt = pos;
+  }
+
+  // Parser
+
+  var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true, "regexp": true, "this": true, "jsonld-keyword": true};
+
+  function JSLexical(indented, column, type, align, prev, info) {
+    this.indented = indented;
+    this.column = column;
+    this.type = type;
+    this.prev = prev;
+    this.info = info;
+    if (align != null) this.align = align;
+  }
+
+  function inScope(state, varname) {
+    for (var v = state.localVars; v; v = v.next)
+      if (v.name == varname) return true;
+    for (var cx = state.context; cx; cx = cx.prev) {
+      for (var v = cx.vars; v; v = v.next)
+        if (v.name == varname) return true;
+    }
+  }
+
+  function parseJS(state, style, type, content, stream) {
+    var cc = state.cc;
+    // Communicate our context to the combinators.
+    // (Less wasteful than consing up a hundred closures on every call.)
+    cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc; cx.style = style;
+
+    if (!state.lexical.hasOwnProperty("align"))
+      state.lexical.align = true;
+
+    while(true) {
+      var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;
+      if (combinator(type, content)) {
+        while(cc.length && cc[cc.length - 1].lex)
+          cc.pop()();
+        if (cx.marked) return cx.marked;
+        if (type == "variable" && inScope(state, content)) return "variable-2";
+        return style;
+      }
+    }
+  }
+
+  // Combinator utils
+
+  var cx = {state: null, column: null, marked: null, cc: null};
+  function pass() {
+    for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
+  }
+  function cont() {
+    pass.apply(null, arguments);
+    return true;
+  }
+  function register(varname) {
+    function inList(list) {
+      for (var v = list; v; v = v.next)
+        if (v.name == varname) return true;
+      return false;
+    }
+    var state = cx.state;
+    cx.marked = "def";
+    if (state.context) {
+      if (inList(state.localVars)) return;
+      state.localVars = {name: varname, next: state.localVars};
+    } else {
+      if (inList(state.globalVars)) return;
+      if (parserConfig.globalVars)
+        state.globalVars = {name: varname, next: state.globalVars};
+    }
+  }
+
+  // Combinators
+
+  var defaultVars = {name: "this", next: {name: "arguments"}};
+  function pushcontext() {
+    cx.state.context = {prev: cx.state.context, vars: cx.state.localVars};
+    cx.state.localVars = defaultVars;
+  }
+  function popcontext() {
+    cx.state.localVars = cx.state.context.vars;
+    cx.state.context = cx.state.context.prev;
+  }
+  function pushlex(type, info) {
+    var result = function() {
+      var state = cx.state, indent = state.indented;
+      if (state.lexical.type == "stat") indent = state.lexical.indented;
+      else for (var outer = state.lexical; outer && outer.type == ")" && outer.align; outer = outer.prev)
+        indent = outer.indented;
+      state.lexical = new JSLexical(indent, cx.stream.column(), type, null, state.lexical, info);
+    };
+    result.lex = true;
+    return result;
+  }
+  function poplex() {
+    var state = cx.state;
+    if (state.lexical.prev) {
+      if (state.lexical.type == ")")
+        state.indented = state.lexical.indented;
+      state.lexical = state.lexical.prev;
+    }
+  }
+  poplex.lex = true;
+
+  function expect(wanted) {
+    function exp(type) {
+      if (type == wanted) return cont();
+      else if (wanted == ";") return pass();
+      else return cont(exp);
+    };
+    return exp;
+  }
+
+  function statement(type, value) {
+    if (type == "var") return cont(pushlex("vardef", value.length), vardef, expect(";"), poplex);
+    if (type == "keyword a") return cont(pushlex("form"), parenExpr, statement, poplex);
+    if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
+    if (type == "keyword d") return cx.stream.match(/^\s*$/, false) ? cont() : cont(pushlex("stat"), maybeexpression, expect(";"), poplex);
+    if (type == "debugger") return cont(expect(";"));
+    if (type == "{") return cont(pushlex("}"), block, poplex);
+    if (type == ";") return cont();
+    if (type == "if") {
+      if (cx.state.lexical.info == "else" && cx.state.cc[cx.state.cc.length - 1] == poplex)
+        cx.state.cc.pop()();
+      return cont(pushlex("form"), parenExpr, statement, poplex, maybeelse);
+    }
+    if (type == "function") return cont(functiondef);
+    if (type == "for") return cont(pushlex("form"), forspec, statement, poplex);
+    if (type == "variable") {
+      if (isTS && value == "type") {
+        cx.marked = "keyword"
+        return cont(typeexpr, expect("operator"), typeexpr, expect(";"));
+      } if (isTS && value == "declare") {
+        cx.marked = "keyword"
+        return cont(statement)
+      } else {
+        return cont(pushlex("stat"), maybelabel);
+      }
+    }
+    if (type == "switch") return cont(pushlex("form"), parenExpr, expect("{"), pushlex("}", "switch"),
+                                      block, poplex, poplex);
+    if (type == "case") return cont(expression, expect(":"));
+    if (type == "default") return cont(expect(":"));
+    if (type == "catch") return cont(pushlex("form"), pushcontext, expect("("), funarg, expect(")"),
+                                     statement, poplex, popcontext);
+    if (type == "class") return cont(pushlex("form"), className, poplex);
+    if (type == "export") return cont(pushlex("stat"), afterExport, poplex);
+    if (type == "import") return cont(pushlex("stat"), afterImport, poplex);
+    if (type == "module") return cont(pushlex("form"), pattern, expect("{"), pushlex("}"), block, poplex, poplex)
+    if (type == "async") return cont(statement)
+    if (value == "@") return cont(expression, statement)
+    return pass(pushlex("stat"), expression, expect(";"), poplex);
+  }
+  function expression(type) {
+    return expressionInner(type, false);
+  }
+  function expressionNoComma(type) {
+    return expressionInner(type, true);
+  }
+  function parenExpr(type) {
+    if (type != "(") return pass()
+    return cont(pushlex(")"), expression, expect(")"), poplex)
+  }
+  function expressionInner(type, noComma) {
+    if (cx.state.fatArrowAt == cx.stream.start) {
+      var body = noComma ? arrowBodyNoComma : arrowBody;
+      if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, expect("=>"), body, popcontext);
+      else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
+    }
+
+    var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
+    if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
+    if (type == "function") return cont(functiondef, maybeop);
+    if (type == "class") return cont(pushlex("form"), classExpression, poplex);
+    if (type == "keyword c" || type == "async") return cont(noComma ? expressionNoComma : expression);
+    if (type == "(") return cont(pushlex(")"), maybeexpression, expect(")"), poplex, maybeop);
+    if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
+    if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
+    if (type == "{") return contCommasep(objprop, "}", null, maybeop);
+    if (type == "quasi") return pass(quasi, maybeop);
+    if (type == "new") return cont(maybeTarget(noComma));
+    return cont();
+  }
+  function maybeexpression(type) {
+    if (type.match(/[;\}\)\],]/)) return pass();
+    return pass(expression);
+  }
+
+  function maybeoperatorComma(type, value) {
+    if (type == ",") return cont(expression);
+    return maybeoperatorNoComma(type, value, false);
+  }
+  function maybeoperatorNoComma(type, value, noComma) {
+    var me = noComma == false ? maybeoperatorComma : maybeoperatorNoComma;
+    var expr = noComma == false ? expression : expressionNoComma;
+    if (type == "=>") return cont(pushcontext, noComma ? arrowBodyNoComma : arrowBody, popcontext);
+    if (type == "operator") {
+      if (/\+\+|--/.test(value) || isTS && value == "!") return cont(me);
+      if (value == "?") return cont(expression, expect(":"), expr);
+      return cont(expr);
+    }
+    if (type == "quasi") { return pass(quasi, me); }
+    if (type == ";") return;
+    if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
+    if (type == ".") return cont(property, me);
+    if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
+    if (isTS && value == "as") { cx.marked = "keyword"; return cont(typeexpr, me) }
+    if (type == "regexp") {
+      cx.state.lastType = cx.marked = "operator"
+      cx.stream.backUp(cx.stream.pos - cx.stream.start - 1)
+      return cont(expr)
+    }
+  }
+  function quasi(type, value) {
+    if (type != "quasi") return pass();
+    if (value.slice(value.length - 2) != "${") return cont(quasi);
+    return cont(expression, continueQuasi);
+  }
+  function continueQuasi(type) {
+    if (type == "}") {
+      cx.marked = "string-2";
+      cx.state.tokenize = tokenQuasi;
+      return cont(quasi);
+    }
+  }
+  function arrowBody(type) {
+    findFatArrow(cx.stream, cx.state);
+    return pass(type == "{" ? statement : expression);
+  }
+  function arrowBodyNoComma(type) {
+    findFatArrow(cx.stream, cx.state);
+    return pass(type == "{" ? statement : expressionNoComma);
+  }
+  function maybeTarget(noComma) {
+    return function(type) {
+      if (type == ".") return cont(noComma ? targetNoComma : target);
+      else if (type == "variable" && isTS) return cont(maybeTypeArgs, noComma ? maybeoperatorNoComma : maybeoperatorComma)
+      else return pass(noComma ? expressionNoComma : expression);
+    };
+  }
+  function target(_, value) {
+    if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorComma); }
+  }
+  function targetNoComma(_, value) {
+    if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorNoComma); }
+  }
+  function maybelabel(type) {
+    if (type == ":") return cont(poplex, statement);
+    return pass(maybeoperatorComma, expect(";"), poplex);
+  }
+  function property(type) {
+    if (type == "variable") {cx.marked = "property"; return cont();}
+  }
+  function objprop(type, value) {
+    if (type == "async") {
+      cx.marked = "property";
+      return cont(objprop);
+    } else if (type == "variable" || cx.style == "keyword") {
+      cx.marked = "property";
+      if (value == "get" || value == "set") return cont(getterSetter);
+      var m // Work around fat-arrow-detection complication for detecting typescript typed arrow params
+      if (isTS && cx.state.fatArrowAt == cx.stream.start && (m = cx.stream.match(/^\s*:\s*/, false)))
+        cx.state.fatArrowAt = cx.stream.pos + m[0].length
+      return cont(afterprop);
+    } else if (type == "number" || type == "string") {
+      cx.marked = jsonldMode ? "property" : (cx.style + " property");
+      return cont(afterprop);
+    } else if (type == "jsonld-keyword") {
+      return cont(afterprop);
+    } else if (type == "modifier") {
+      return cont(objprop)
+    } else if (type == "[") {
+      return cont(expression, expect("]"), afterprop);
+    } else if (type == "spread") {
+      return cont(expressionNoComma, afterprop);
+    } else if (value == "*") {
+      cx.marked = "keyword";
+      return cont(objprop);
+    } else if (type == ":") {
+      return pass(afterprop)
+    }
+  }
+  function getterSetter(type) {
+    if (type != "variable") return pass(afterprop);
+    cx.marked = "property";
+    return cont(functiondef);
+  }
+  function afterprop(type) {
+    if (type == ":") return cont(expressionNoComma);
+    if (type == "(") return pass(functiondef);
+  }
+  function commasep(what, end, sep) {
+    function proceed(type, value) {
+      if (sep ? sep.indexOf(type) > -1 : type == ",") {
+        var lex = cx.state.lexical;
+        if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
+        return cont(function(type, value) {
+          if (type == end || value == end) return pass()
+          return pass(what)
+        }, proceed);
+      }
+      if (type == end || value == end) return cont();
+      return cont(expect(end));
+    }
+    return function(type, value) {
+      if (type == end || value == end) return cont();
+      return pass(what, proceed);
+    };
+  }
+  function contCommasep(what, end, info) {
+    for (var i = 3; i < arguments.length; i++)
+      cx.cc.push(arguments[i]);
+    return cont(pushlex(end, info), commasep(what, end), poplex);
+  }
+  function block(type) {
+    if (type == "}") return cont();
+    return pass(statement, block);
+  }
+  function maybetype(type, value) {
+    if (isTS) {
+      if (type == ":") return cont(typeexpr);
+      if (value == "?") return cont(maybetype);
+    }
+  }
+  function typeexpr(type, value) {
+    if (type == "variable" || value == "void") {
+      if (value == "keyof") {
+        cx.marked = "keyword"
+        return cont(typeexpr)
+      } else {
+        cx.marked = "type"
+        return cont(afterType)
+      }
+    }
+    if (type == "string" || type == "number" || type == "atom") return cont(afterType);
+    if (type == "[") return cont(pushlex("]"), commasep(typeexpr, "]", ","), poplex, afterType)
+    if (type == "{") return cont(pushlex("}"), commasep(typeprop, "}", ",;"), poplex, afterType)
+    if (type == "(") return cont(commasep(typearg, ")"), maybeReturnType)
+  }
+  function maybeReturnType(type) {
+    if (type == "=>") return cont(typeexpr)
+  }
+  function typeprop(type, value) {
+    if (type == "variable" || cx.style == "keyword") {
+      cx.marked = "property"
+      return cont(typeprop)
+    } else if (value == "?") {
+      return cont(typeprop)
+    } else if (type == ":") {
+      return cont(typeexpr)
+    } else if (type == "[") {
+      return cont(expression, maybetype, expect("]"), typeprop)
+    }
+  }
+  function typearg(type) {
+    if (type == "variable") return cont(typearg)
+    else if (type == ":") return cont(typeexpr)
+  }
+  function afterType(type, value) {
+    if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
+    if (value == "|" || type == ".") return cont(typeexpr)
+    if (type == "[") return cont(expect("]"), afterType)
+    if (value == "extends") return cont(typeexpr)
+  }
+  function maybeTypeArgs(_, value) {
+    if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
+  }
+  function vardef() {
+    return pass(pattern, maybetype, maybeAssign, vardefCont);
+  }
+  function pattern(type, value) {
+    if (type == "modifier") return cont(pattern)
+    if (type == "variable") { register(value); return cont(); }
+    if (type == "spread") return cont(pattern);
+    if (type == "[") return contCommasep(pattern, "]");
+    if (type == "{") return contCommasep(proppattern, "}");
+  }
+  function proppattern(type, value) {
+    if (type == "variable" && !cx.stream.match(/^\s*:/, false)) {
+      register(value);
+      return cont(maybeAssign);
+    }
+    if (type == "variable") cx.marked = "property";
+    if (type == "spread") return cont(pattern);
+    if (type == "}") return pass();
+    return cont(expect(":"), pattern, maybeAssign);
+  }
+  function maybeAssign(_type, value) {
+    if (value == "=") return cont(expressionNoComma);
+  }
+  function vardefCont(type) {
+    if (type == ",") return cont(vardef);
+  }
+  function maybeelse(type, value) {
+    if (type == "keyword b" && value == "else") return cont(pushlex("form", "else"), statement, poplex);
+  }
+  function forspec(type) {
+    if (type == "(") return cont(pushlex(")"), forspec1, expect(")"), poplex);
+  }
+  function forspec1(type) {
+    if (type == "var") return cont(vardef, expect(";"), forspec2);
+    if (type == ";") return cont(forspec2);
+    if (type == "variable") return cont(formaybeinof);
+    return pass(expression, expect(";"), forspec2);
+  }
+  function formaybeinof(_type, value) {
+    if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression); }
+    return cont(maybeoperatorComma, forspec2);
+  }
+  function forspec2(type, value) {
+    if (type == ";") return cont(forspec3);
+    if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression); }
+    return pass(expression, expect(";"), forspec3);
+  }
+  function forspec3(type) {
+    if (type != ")") cont(expression);
+  }
+  function functiondef(type, value) {
+    if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
+    if (type == "variable") {register(value); return cont(functiondef);}
+    if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, maybetype, statement, popcontext);
+    if (isTS && value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, functiondef)
+  }
+  function funarg(type, value) {
+    if (value == "@") cont(expression, funarg)
+    if (type == "spread" || type == "modifier") return cont(funarg);
+    return pass(pattern, maybetype, maybeAssign);
+  }
+  function classExpression(type, value) {
+    // Class expressions may have an optional name.
+    if (type == "variable") return className(type, value);
+    return classNameAfter(type, value);
+  }
+  function className(type, value) {
+    if (type == "variable") {register(value); return cont(classNameAfter);}
+  }
+  function classNameAfter(type, value) {
+    if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, classNameAfter)
+    if (value == "extends" || value == "implements" || (isTS && type == ","))
+      return cont(isTS ? typeexpr : expression, classNameAfter);
+    if (type == "{") return cont(pushlex("}"), classBody, poplex);
+  }
+  function classBody(type, value) {
+    if (type == "modifier" || type == "async" ||
+        (type == "variable" &&
+         (value == "static" || value == "get" || value == "set") &&
+         cx.stream.match(/^\s+[\w$\xa1-\uffff]/, false))) {
+      cx.marked = "keyword";
+      return cont(classBody);
+    }
+    if (type == "variable" || cx.style == "keyword") {
+      cx.marked = "property";
+      return cont(isTS ? classfield : functiondef, classBody);
+    }
+    if (type == "[")
+      return cont(expression, expect("]"), isTS ? classfield : functiondef, classBody)
+    if (value == "*") {
+      cx.marked = "keyword";
+      return cont(classBody);
+    }
+    if (type == ";") return cont(classBody);
+    if (type == "}") return cont();
+    if (value == "@") return cont(expression, classBody)
+  }
+  function classfield(type, value) {
+    if (value == "?") return cont(classfield)
+    if (type == ":") return cont(typeexpr, maybeAssign)
+    if (value == "=") return cont(expressionNoComma)
+    return pass(functiondef)
+  }
+  function afterExport(type, value) {
+    if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
+    if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
+    if (type == "{") return cont(commasep(exportField, "}"), maybeFrom, expect(";"));
+    return pass(statement);
+  }
+  function exportField(type, value) {
+    if (value == "as") { cx.marked = "keyword"; return cont(expect("variable")); }
+    if (type == "variable") return pass(expressionNoComma, exportField);
+  }
+  function afterImport(type) {
+    if (type == "string") return cont();
+    return pass(importSpec, maybeMoreImports, maybeFrom);
+  }
+  function importSpec(type, value) {
+    if (type == "{") return contCommasep(importSpec, "}");
+    if (type == "variable") register(value);
+    if (value == "*") cx.marked = "keyword";
+    return cont(maybeAs);
+  }
+  function maybeMoreImports(type) {
+    if (type == ",") return cont(importSpec, maybeMoreImports)
+  }
+  function maybeAs(_type, value) {
+    if (value == "as") { cx.marked = "keyword"; return cont(importSpec); }
+  }
+  function maybeFrom(_type, value) {
+    if (value == "from") { cx.marked = "keyword"; return cont(expression); }
+  }
+  function arrayLiteral(type) {
+    if (type == "]") return cont();
+    return pass(commasep(expressionNoComma, "]"));
+  }
+
+  function isContinuedStatement(state, textAfter) {
+    return state.lastType == "operator" || state.lastType == "," ||
+      isOperatorChar.test(textAfter.charAt(0)) ||
+      /[,.]/.test(textAfter.charAt(0));
+  }
+
+  function expressionAllowed(stream, state, backUp) {
+    return state.tokenize == tokenBase &&
+      /^(?:operator|sof|keyword [bcd]|case|new|export|default|spread|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
+      (state.lastType == "quasi" && /\{\s*$/.test(stream.string.slice(0, stream.pos - (backUp || 0))))
+  }
+
+  // Interface
+
+  return {
+    startState: function(basecolumn) {
+      var state = {
+        tokenize: tokenBase,
+        lastType: "sof",
+        cc: [],
+        lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),
+        localVars: parserConfig.localVars,
+        context: parserConfig.localVars && {vars: parserConfig.localVars},
+        indented: basecolumn || 0
+      };
+      if (parserConfig.globalVars && typeof parserConfig.globalVars == "object")
+        state.globalVars = parserConfig.globalVars;
+      return state;
+    },
+
+    token: function(stream, state) {
+      if (stream.sol()) {
+        if (!state.lexical.hasOwnProperty("align"))
+          state.lexical.align = false;
+        state.indented = stream.indentation();
+        findFatArrow(stream, state);
+      }
+      if (state.tokenize != tokenComment && stream.eatSpace()) return null;
+      var style = state.tokenize(stream, state);
+      if (type == "comment") return style;
+      state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
+      return parseJS(state, style, type, content, stream);
+    },
+
+    indent: function(state, textAfter) {
+      if (state.tokenize == tokenComment) return CodeMirror.Pass;
+      if (state.tokenize != tokenBase) return 0;
+      var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical, top
+      // Kludge to prevent 'maybelse' from blocking lexical scope pops
+      if (!/^\s*else\b/.test(textAfter)) for (var i = state.cc.length - 1; i >= 0; --i) {
+        var c = state.cc[i];
+        if (c == poplex) lexical = lexical.prev;
+        else if (c != maybeelse) break;
+      }
+      while ((lexical.type == "stat" || lexical.type == "form") &&
+             (firstChar == "}" || ((top = state.cc[state.cc.length - 1]) &&
+                                   (top == maybeoperatorComma || top == maybeoperatorNoComma) &&
+                                   !/^[,\.=+\-*:?[\(]/.test(textAfter))))
+        lexical = lexical.prev;
+      if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
+        lexical = lexical.prev;
+      var type = lexical.type, closing = firstChar == type;
+
+      if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info + 1 : 0);
+      else if (type == "form" && firstChar == "{") return lexical.indented;
+      else if (type == "form") return lexical.indented + indentUnit;
+      else if (type == "stat")
+        return lexical.indented + (isContinuedStatement(state, textAfter) ? statementIndent || indentUnit : 0);
+      else if (lexical.info == "switch" && !closing && parserConfig.doubleIndentSwitch != false)
+        return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);
+      else if (lexical.align) return lexical.column + (closing ? 0 : 1);
+      else return lexical.indented + (closing ? 0 : indentUnit);
+    },
+
+    electricInput: /^\s*(?:case .*?:|default:|\{|\})$/,
+    blockCommentStart: jsonMode ? null : "/*",
+    blockCommentEnd: jsonMode ? null : "*/",
+    blockCommentContinue: jsonMode ? null : " * ",
+    lineComment: jsonMode ? null : "//",
+    fold: "brace",
+    closeBrackets: "()[]{}''\"\"``",
+
+    helperType: jsonMode ? "json" : "javascript",
+    jsonldMode: jsonldMode,
+    jsonMode: jsonMode,
+
+    expressionAllowed: expressionAllowed,
+
+    skipExpression: function(state) {
+      var top = state.cc[state.cc.length - 1]
+      if (top == expression || top == expressionNoComma) state.cc.pop()
+    }
+  };
+});
+
+CodeMirror.registerHelper("wordChars", "javascript", /[\w$]/);
+
+CodeMirror.defineMIME("text/javascript", "javascript");
+CodeMirror.defineMIME("text/ecmascript", "javascript");
+CodeMirror.defineMIME("application/javascript", "javascript");
+CodeMirror.defineMIME("application/x-javascript", "javascript");
+CodeMirror.defineMIME("application/ecmascript", "javascript");
+CodeMirror.defineMIME("application/json", {name: "javascript", json: true});
+CodeMirror.defineMIME("application/x-json", {name: "javascript", json: true});
+CodeMirror.defineMIME("application/ld+json", {name: "javascript", jsonld: true});
+CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true });
+CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true });
+
+});
+
+},{"../../lib/codemirror":2}],5:[function(require,module,exports){
 (function (process){
 /**
@@ -923,5 +11594,5 @@
 
 }).call(this,require('_process'))
-},{"_process":26,"fbjs/lib/emptyObject":13,"fbjs/lib/invariant":18,"fbjs/lib/warning":24,"object-assign":25}],3:[function(require,module,exports){
+},{"_process":29,"fbjs/lib/emptyObject":16,"fbjs/lib/invariant":21,"fbjs/lib/warning":27,"object-assign":28}],6:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -953,5 +11624,5 @@
 );
 
-},{"./factory":2,"react":44}],4:[function(require,module,exports){
+},{"./factory":5,"react":49}],7:[function(require,module,exports){
 'use strict';
 
@@ -971,5 +11642,5 @@
 }
 module.exports = exports['default'];
-},{"./hasClass":5}],5:[function(require,module,exports){
+},{"./hasClass":8}],8:[function(require,module,exports){
 "use strict";
 
@@ -982,5 +11653,5 @@
 }
 module.exports = exports["default"];
-},{}],6:[function(require,module,exports){
+},{}],9:[function(require,module,exports){
 'use strict';
 
@@ -988,5 +11659,5 @@
   if (element.classList) element.classList.remove(className);else element.className = element.className.replace(new RegExp('(^|\\s)' + className + '(?:\\s|$)', 'g'), '$1').replace(/\s+/g, ' ').replace(/^\s*|\s*$/g, '');
 };
-},{}],7:[function(require,module,exports){
+},{}],10:[function(require,module,exports){
 (function (process){
 'use strict';
@@ -1065,5 +11736,5 @@
 module.exports = EventListener;
 }).call(this,require('_process'))
-},{"./emptyFunction":12,"_process":26}],8:[function(require,module,exports){
+},{"./emptyFunction":15,"_process":29}],11:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -1099,5 +11770,5 @@
 
 module.exports = ExecutionEnvironment;
-},{}],9:[function(require,module,exports){
+},{}],12:[function(require,module,exports){
 "use strict";
 
@@ -1129,5 +11800,5 @@
 
 module.exports = camelize;
-},{}],10:[function(require,module,exports){
+},{}],13:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -1167,5 +11838,5 @@
 
 module.exports = camelizeStyleName;
-},{"./camelize":9}],11:[function(require,module,exports){
+},{"./camelize":12}],14:[function(require,module,exports){
 'use strict';
 
@@ -1205,5 +11876,5 @@
 
 module.exports = containsNode;
-},{"./isTextNode":20}],12:[function(require,module,exports){
+},{"./isTextNode":23}],15:[function(require,module,exports){
 "use strict";
 
@@ -1242,5 +11913,5 @@
 
 module.exports = emptyFunction;
-},{}],13:[function(require,module,exports){
+},{}],16:[function(require,module,exports){
 (function (process){
 /**
@@ -1262,5 +11933,5 @@
 module.exports = emptyObject;
 }).call(this,require('_process'))
-},{"_process":26}],14:[function(require,module,exports){
+},{"_process":29}],17:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -1287,5 +11958,5 @@
 
 module.exports = focusNode;
-},{}],15:[function(require,module,exports){
+},{}],18:[function(require,module,exports){
 'use strict';
 
@@ -1324,5 +11995,5 @@
 
 module.exports = getActiveElement;
-},{}],16:[function(require,module,exports){
+},{}],19:[function(require,module,exports){
 'use strict';
 
@@ -1355,5 +12026,5 @@
 
 module.exports = hyphenate;
-},{}],17:[function(require,module,exports){
+},{}],20:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -1392,5 +12063,5 @@
 
 module.exports = hyphenateStyleName;
-},{"./hyphenate":16}],18:[function(require,module,exports){
+},{"./hyphenate":19}],21:[function(require,module,exports){
 (function (process){
 /**
@@ -1448,5 +12119,5 @@
 module.exports = invariant;
 }).call(this,require('_process'))
-},{"_process":26}],19:[function(require,module,exports){
+},{"_process":29}],22:[function(require,module,exports){
 'use strict';
 
@@ -1471,5 +12142,5 @@
 
 module.exports = isNode;
-},{}],20:[function(require,module,exports){
+},{}],23:[function(require,module,exports){
 'use strict';
 
@@ -1494,5 +12165,5 @@
 
 module.exports = isTextNode;
-},{"./isNode":19}],21:[function(require,module,exports){
+},{"./isNode":22}],24:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -1515,5 +12186,5 @@
 
 module.exports = performance || {};
-},{"./ExecutionEnvironment":8}],22:[function(require,module,exports){
+},{"./ExecutionEnvironment":11}],25:[function(require,module,exports){
 'use strict';
 
@@ -1547,5 +12218,5 @@
 
 module.exports = performanceNow;
-},{"./performance":21}],23:[function(require,module,exports){
+},{"./performance":24}],26:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -1613,5 +12284,5 @@
 
 module.exports = shallowEqual;
-},{}],24:[function(require,module,exports){
+},{}],27:[function(require,module,exports){
 (function (process){
 /**
@@ -1678,5 +12349,5 @@
 module.exports = warning;
 }).call(this,require('_process'))
-},{"./emptyFunction":12,"_process":26}],25:[function(require,module,exports){
+},{"./emptyFunction":15,"_process":29}],28:[function(require,module,exports){
 /*
 object-assign
@@ -1770,5 +12441,5 @@
 };
 
-},{}],26:[function(require,module,exports){
+},{}],29:[function(require,module,exports){
 // shim for using process in browser
 var process = module.exports = {};
@@ -1956,5 +12627,5 @@
 process.umask = function() { return 0; };
 
-},{}],27:[function(require,module,exports){
+},{}],30:[function(require,module,exports){
 (function (process){
 /**
@@ -2019,5 +12690,5 @@
 
 }).call(this,require('_process'))
-},{"./lib/ReactPropTypesSecret":31,"_process":26,"fbjs/lib/invariant":18,"fbjs/lib/warning":24}],28:[function(require,module,exports){
+},{"./lib/ReactPropTypesSecret":34,"_process":29,"fbjs/lib/invariant":21,"fbjs/lib/warning":27}],31:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -2079,5 +12750,5 @@
 };
 
-},{"./lib/ReactPropTypesSecret":31,"fbjs/lib/emptyFunction":12,"fbjs/lib/invariant":18}],29:[function(require,module,exports){
+},{"./lib/ReactPropTypesSecret":34,"fbjs/lib/emptyFunction":15,"fbjs/lib/invariant":21}],32:[function(require,module,exports){
 (function (process){
 /**
@@ -2625,5 +13296,5 @@
 
 }).call(this,require('_process'))
-},{"./checkPropTypes":27,"./lib/ReactPropTypesSecret":31,"_process":26,"fbjs/lib/emptyFunction":12,"fbjs/lib/invariant":18,"fbjs/lib/warning":24,"object-assign":25}],30:[function(require,module,exports){
+},{"./checkPropTypes":30,"./lib/ReactPropTypesSecret":34,"_process":29,"fbjs/lib/emptyFunction":15,"fbjs/lib/invariant":21,"fbjs/lib/warning":27,"object-assign":28}],33:[function(require,module,exports){
 (function (process){
 /**
@@ -2657,5 +13328,5 @@
 
 }).call(this,require('_process'))
-},{"./factoryWithThrowingShims":28,"./factoryWithTypeCheckers":29,"_process":26}],31:[function(require,module,exports){
+},{"./factoryWithThrowingShims":31,"./factoryWithTypeCheckers":32,"_process":29}],34:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -2671,5 +13342,5 @@
 module.exports = ReactPropTypesSecret;
 
-},{}],32:[function(require,module,exports){
+},{}],35:[function(require,module,exports){
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
@@ -2829,5 +13500,579 @@
 module.exports = LinkedStateMixin;
 
-},{}],33:[function(require,module,exports){
+},{}],36:[function(require,module,exports){
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+'use strict';
+
+var shallowEqual = require('fbjs/lib/shallowEqual');
+
+module.exports = {
+  shouldComponentUpdate: function(nextProps, nextState) {
+    return (
+      !shallowEqual(this.props, nextProps) ||
+      !shallowEqual(this.state, nextState)
+    );
+  }
+};
+
+},{"fbjs/lib/shallowEqual":26}],37:[function(require,module,exports){
+(function (global){
+'use strict';
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = Object.setPrototypeOf ||
+        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+    return function (d, b) {
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+Object.defineProperty(exports, '__esModule', { value: true });
+var React = require('react');
+var SERVER_RENDERED = (typeof navigator === 'undefined' || global['PREVENT_CODEMIRROR_RENDER'] === true);
+var cm;
+if (!SERVER_RENDERED) {
+    cm = require('codemirror');
+}
+var Helper = (function () {
+    function Helper() {
+    }
+    Helper.equals = function (x, y) {
+        var _this = this;
+        var ok = Object.keys, tx = typeof x, ty = typeof y;
+        return x && y && tx === 'object' && tx === ty ? (ok(x).length === ok(y).length &&
+            ok(x).every(function (key) { return _this.equals(x[key], y[key]); })) : (x === y);
+    };
+    return Helper;
+}());
+var Shared = (function () {
+    function Shared(editor, props) {
+        this.editor = editor;
+        this.props = props;
+    }
+    Shared.prototype.delegateCursor = function (position, scroll, focus) {
+        var doc = this.editor.getDoc();
+        if (focus) {
+            this.editor.focus();
+        }
+        scroll ? doc.setCursor(position) : doc.setCursor(position, null, { scroll: false });
+    };
+    Shared.prototype.delegateScroll = function (coordinates) {
+        this.editor.scrollTo(coordinates.x, coordinates.y);
+    };
+    Shared.prototype.delegateSelection = function (ranges, focus) {
+        this.editor.setSelections(ranges);
+        if (focus) {
+            this.editor.focus();
+        }
+    };
+    Shared.prototype.apply = function (props, next, preserved) {
+        if (next) {
+            if (next.selection) {
+                if (next.selection.ranges) {
+                    if (props.selection) {
+                        if (!Helper.equals(props.selection.ranges, next.selection.ranges)) {
+                            this.delegateSelection(next.selection.ranges, next.selection.focus || false);
+                        }
+                    }
+                    else {
+                        this.delegateSelection(next.selection.ranges, next.selection.focus || false);
+                    }
+                }
+            }
+            if (next.cursor) {
+                if (props.cursor) {
+                    if (!Helper.equals(props.cursor, next.cursor)) {
+                        this.delegateCursor(preserved.cursor || next.cursor, (next.autoScroll || false), (next.autoCursor || false));
+                    }
+                }
+                else {
+                    this.delegateCursor(preserved.cursor || next.cursor, (next.autoScroll || false), (next.autoCursor || false));
+                }
+            }
+            if (next.scroll) {
+                this.delegateScroll(next.scroll);
+            }
+        }
+        else {
+            if (props.selection) {
+                if (props.selection.ranges) {
+                    this.delegateSelection(props.selection.ranges, props.selection.focus || false);
+                }
+            }
+            if (props.cursor) {
+                this.delegateCursor(props.cursor, (props.autoScroll || false), (props.autoFocus || false));
+            }
+            if (props.scroll) {
+                this.delegateScroll(props.scroll);
+            }
+        }
+    };
+    Shared.prototype.wire = function (name) {
+        var _this = this;
+        switch (name) {
+            case 'onBlur':
+                {
+                    this.editor.on('blur', function (cm, event) {
+                        _this.props.onBlur(_this.editor, event);
+                    });
+                }
+                break;
+            case 'onCursor':
+                {
+                    this.editor.on('cursorActivity', function (cm) {
+                        _this.props.onCursor(_this.editor, _this.editor.getCursor());
+                    });
+                }
+                break;
+            case 'onCursorActivity':
+                {
+                    this.editor.on('cursorActivity', function (cm) {
+                        _this.props.onCursorActivity(_this.editor);
+                    });
+                }
+                break;
+            case 'onDragEnter':
+                {
+                    this.editor.on('dragenter', function (cm, event) {
+                        _this.props.onDragEnter(_this.editor, event);
+                    });
+                }
+                break;
+            case 'onDragOver':
+                {
+                    this.editor.on('dragover', function (cm, event) {
+                        _this.props.onDragOver(_this.editor, event);
+                    });
+                }
+                break;
+            case 'onDrop':
+                {
+                    this.editor.on('drop', function (cm, event) {
+                        _this.props.onDrop(_this.editor, event);
+                    });
+                }
+                break;
+            case 'onFocus':
+                {
+                    this.editor.on('focus', function (cm, event) {
+                        _this.props.onFocus(_this.editor, event);
+                    });
+                }
+                break;
+            case 'onGutterClick':
+                {
+                    this.editor.on('gutterClick', function (cm, lineNumber, gutter, event) {
+                        _this.props.onGutterClick(_this.editor, lineNumber, gutter, event);
+                    });
+                }
+                break;
+            case 'onKeyDown':
+                {
+                    this.editor.on('keydown', function (cm, event) {
+                        _this.props.onKeyDown(_this.editor, event);
+                    });
+                }
+                break;
+            case 'onKeyPress':
+                {
+                    this.editor.on('keypress', function (cm, event) {
+                        _this.props.onKeyPress(_this.editor, event);
+                    });
+                }
+                break;
+            case 'onKeyUp':
+                {
+                    this.editor.on('keyup', function (cm, event) {
+                        _this.props.onKeyUp(_this.editor, event);
+                    });
+                }
+                break;
+            case 'onScroll':
+                {
+                    this.editor.on('scroll', function (cm) {
+                        _this.props.onScroll(_this.editor, _this.editor.getScrollInfo());
+                    });
+                }
+                break;
+            case 'onSelection':
+                {
+                    this.editor.on('beforeSelectionChange', function (cm, data) {
+                        _this.props.onSelection(_this.editor, data);
+                    });
+                }
+                break;
+            case 'onUpdate':
+                {
+                    this.editor.on('update', function (cm) {
+                        _this.props.onUpdate(_this.editor);
+                    });
+                }
+                break;
+            case 'onViewportChange':
+                {
+                    this.editor.on('viewportChange', function (cm, from, to) {
+                        _this.props.onViewportChange(_this.editor, from, to);
+                    });
+                }
+                break;
+        }
+    };
+    return Shared;
+}());
+var Controlled = (function (_super) {
+    __extends(Controlled, _super);
+    function Controlled(props) {
+        var _this = _super.call(this, props) || this;
+        if (SERVER_RENDERED)
+            return _this;
+        _this.deferred = null;
+        _this.emulating = false;
+        _this.hydrated = false;
+        _this.initCb = function () {
+            if (_this.props.editorDidConfigure) {
+                _this.props.editorDidConfigure(_this.editor);
+            }
+        };
+        _this.mounted = false;
+        return _this;
+    }
+    Controlled.prototype.hydrate = function (props) {
+        var _this = this;
+        var userDefinedOptions = Object.assign({}, cm.defaults, this.editor.options, props.options || {});
+        var optionDelta = Object.keys(userDefinedOptions).some(function (key) { return _this.editor.getOption(key) !== userDefinedOptions[key]; });
+        if (optionDelta) {
+            Object.keys(userDefinedOptions).forEach(function (key) {
+                if (props.options.hasOwnProperty(key)) {
+                    if (_this.editor.getOption(key) !== userDefinedOptions[key]) {
+                        _this.editor.setOption(key, userDefinedOptions[key]);
+                        _this.mirror.setOption(key, userDefinedOptions[key]);
+                    }
+                }
+            });
+        }
+        if (!this.hydrated) {
+            if (!this.mounted) {
+                this.initChange(props.value || '');
+            }
+            else {
+                if (this.deferred) {
+                    this.resolveChange();
+                }
+                else {
+                    this.initChange(props.value || '');
+                }
+            }
+        }
+        this.hydrated = true;
+    };
+    Controlled.prototype.initChange = function (value) {
+        this.emulating = true;
+        var lastLine = this.editor.lastLine();
+        var lastChar = this.editor.getLine(this.editor.lastLine()).length;
+        this.editor.replaceRange(value || '', { line: 0, ch: 0 }, { line: lastLine, ch: lastChar });
+        this.mirror.setValue(value);
+        this.editor.clearHistory();
+        this.mirror.clearHistory();
+        this.emulating = false;
+    };
+    Controlled.prototype.resolveChange = function () {
+        this.emulating = true;
+        if (this.deferred.origin === 'undo') {
+            this.editor.undo();
+        }
+        else if (this.deferred.origin === 'redo') {
+            this.editor.redo();
+        }
+        else {
+            this.editor.replaceRange(this.deferred.text, this.deferred.from, this.deferred.to, this.deferred.origin);
+        }
+        this.emulating = false;
+        this.deferred = null;
+    };
+    Controlled.prototype.mirrorChange = function (deferred) {
+        if (deferred.origin === 'undo') {
+            this.editor.setHistory(this.mirror.getHistory());
+            this.mirror.undo();
+        }
+        else if (deferred.origin === 'redo') {
+            this.editor.setHistory(this.mirror.getHistory());
+            this.mirror.redo();
+        }
+        else {
+            this.mirror.replaceRange(deferred.text, deferred.from, deferred.to, deferred.origin);
+        }
+        return this.mirror.getValue();
+    };
+    Controlled.prototype.componentWillMount = function () {
+        if (SERVER_RENDERED)
+            return;
+        if (this.props.editorWillMount) {
+            this.props.editorWillMount();
+        }
+    };
+    Controlled.prototype.componentDidMount = function () {
+        var _this = this;
+        if (SERVER_RENDERED)
+            return;
+        if (this.props.defineMode) {
+            if (this.props.defineMode.name && this.props.defineMode.fn) {
+                cm.defineMode(this.props.defineMode.name, this.props.defineMode.fn);
+            }
+        }
+        this.editor = cm(this.ref);
+        this.shared = new Shared(this.editor, this.props);
+        this.mirror = cm(function () {
+        });
+        this.editor.on('electricInput', function () {
+            _this.mirror.setHistory(_this.editor.getHistory());
+        });
+        this.editor.on('cursorActivity', function () {
+            _this.mirror.setCursor(_this.editor.getCursor());
+        });
+        this.editor.on('beforeChange', function (cm, data) {
+            if (_this.emulating) {
+                return;
+            }
+            data.cancel();
+            _this.deferred = data;
+            var phantomChange = _this.mirrorChange(_this.deferred);
+            if (_this.props.onBeforeChange)
+                _this.props.onBeforeChange(_this.editor, _this.deferred, phantomChange);
+        });
+        this.editor.on('change', function (cm, data) {
+            if (!_this.mounted) {
+                return;
+            }
+            if (_this.props.onChange) {
+                _this.props.onChange(_this.editor, data, _this.editor.getValue());
+            }
+        });
+        this.hydrate(this.props);
+        this.shared.apply(this.props);
+        this.mounted = true;
+        if (this.props.onBlur)
+            this.shared.wire('onBlur');
+        if (this.props.onCursor)
+            this.shared.wire('onCursor');
+        if (this.props.onCursorActivity)
+            this.shared.wire('onCursorActivity');
+        if (this.props.onDragEnter)
+            this.shared.wire('onDragEnter');
+        if (this.props.onDragOver)
+            this.shared.wire('onDragOver');
+        if (this.props.onDrop)
+            this.shared.wire('onDrop');
+        if (this.props.onFocus)
+            this.shared.wire('onFocus');
+        if (this.props.onGutterClick)
+            this.shared.wire('onGutterClick');
+        if (this.props.onKeyDown)
+            this.shared.wire('onKeyDown');
+        if (this.props.onKeyPress)
+            this.shared.wire('onKeyPress');
+        if (this.props.onKeyUp)
+            this.shared.wire('onKeyUp');
+        if (this.props.onScroll)
+            this.shared.wire('onScroll');
+        if (this.props.onSelection)
+            this.shared.wire('onSelection');
+        if (this.props.onUpdate)
+            this.shared.wire('onUpdate');
+        if (this.props.onViewportChange)
+            this.shared.wire('onViewportChange');
+        if (this.props.editorDidMount) {
+            this.props.editorDidMount(this.editor, this.editor.getValue(), this.initCb);
+        }
+    };
+    Controlled.prototype.componentWillReceiveProps = function (nextProps) {
+        if (SERVER_RENDERED)
+            return;
+        var preserved = { cursor: null };
+        if (nextProps.value !== this.props.value) {
+            this.hydrated = false;
+        }
+        if (!this.props.autoCursor && this.props.autoCursor !== undefined) {
+            preserved.cursor = this.editor.getCursor();
+        }
+        this.hydrate(nextProps);
+        this.shared.apply(this.props, nextProps, preserved);
+    };
+    Controlled.prototype.componentWillUnmount = function () {
+        if (SERVER_RENDERED)
+            return;
+        if (this.props.editorWillUnmount) {
+            this.props.editorWillUnmount(cm);
+        }
+    };
+    Controlled.prototype.shouldComponentUpdate = function (nextProps, nextState) {
+        return !SERVER_RENDERED;
+    };
+    Controlled.prototype.render = function () {
+        var _this = this;
+        if (SERVER_RENDERED)
+            return null;
+        var className = this.props.className ? 'react-codemirror2 ' + this.props.className : 'react-codemirror2';
+        return (React.createElement('div', { className: className, ref: function (self) { return _this.ref = self; } }));
+    };
+    return Controlled;
+}(React.Component));
+exports.Controlled = Controlled;
+var UnControlled = (function (_super) {
+    __extends(UnControlled, _super);
+    function UnControlled(props) {
+        var _this = _super.call(this, props) || this;
+        if (SERVER_RENDERED)
+            return _this;
+        _this.continueChange = false;
+        _this.hydrated = false;
+        _this.initCb = function () {
+            if (_this.props.editorDidConfigure) {
+                _this.props.editorDidConfigure(_this.editor);
+            }
+        };
+        _this.mounted = false;
+        _this.onBeforeChangeCb = function () {
+            _this.continueChange = true;
+        };
+        return _this;
+    }
+    UnControlled.prototype.hydrate = function (props) {
+        var _this = this;
+        var userDefinedOptions = Object.assign({}, cm.defaults, this.editor.options, props.options || {});
+        var optionDelta = Object.keys(userDefinedOptions).some(function (key) { return _this.editor.getOption(key) !== userDefinedOptions[key]; });
+        if (optionDelta) {
+            Object.keys(userDefinedOptions).forEach(function (key) {
+                if (props.options.hasOwnProperty(key)) {
+                    if (_this.editor.getOption(key) !== userDefinedOptions[key]) {
+                        _this.editor.setOption(key, userDefinedOptions[key]);
+                    }
+                }
+            });
+        }
+        if (!this.hydrated) {
+            var lastLine = this.editor.lastLine();
+            var lastChar = this.editor.getLine(this.editor.lastLine()).length;
+            this.editor.replaceRange(props.value || '', { line: 0, ch: 0 }, { line: lastLine, ch: lastChar });
+        }
+        this.hydrated = true;
+    };
+    UnControlled.prototype.componentWillMount = function () {
+        if (SERVER_RENDERED)
+            return;
+        if (this.props.editorWillMount) {
+            this.props.editorWillMount();
+        }
+    };
+    UnControlled.prototype.componentDidMount = function () {
+        var _this = this;
+        if (SERVER_RENDERED)
+            return;
+        if (this.props.defineMode) {
+            if (this.props.defineMode.name && this.props.defineMode.fn) {
+                cm.defineMode(this.props.defineMode.name, this.props.defineMode.fn);
+            }
+        }
+        this.editor = cm(this.ref);
+        this.shared = new Shared(this.editor, this.props);
+        this.editor.on('beforeChange', function (cm, data) {
+            if (_this.props.onBeforeChange) {
+                _this.props.onBeforeChange(_this.editor, data, null, _this.onBeforeChangeCb);
+            }
+        });
+        this.editor.on('change', function (cm, data) {
+            if (!_this.mounted) {
+                return;
+            }
+            if (_this.props.onBeforeChange) {
+                if (_this.continueChange) {
+                    _this.props.onChange(_this.editor, data, _this.editor.getValue());
+                }
+            }
+            else {
+                _this.props.onChange(_this.editor, data, _this.editor.getValue());
+            }
+        });
+        this.hydrate(this.props);
+        this.shared.apply(this.props);
+        this.mounted = true;
+        if (this.props.onBlur)
+            this.shared.wire('onBlur');
+        if (this.props.onCursor)
+            this.shared.wire('onCursor');
+        if (this.props.onCursorActivity)
+            this.shared.wire('onCursorActivity');
+        if (this.props.onDragEnter)
+            this.shared.wire('onDragEnter');
+        if (this.props.onDragOver)
+            this.shared.wire('onDragOver');
+        if (this.props.onDrop)
+            this.shared.wire('onDrop');
+        if (this.props.onFocus)
+            this.shared.wire('onFocus');
+        if (this.props.onGutterClick)
+            this.shared.wire('onGutterClick');
+        if (this.props.onKeyDown)
+            this.shared.wire('onKeyDown');
+        if (this.props.onKeyPress)
+            this.shared.wire('onKeyPress');
+        if (this.props.onKeyUp)
+            this.shared.wire('onKeyUp');
+        if (this.props.onScroll)
+            this.shared.wire('onScroll');
+        if (this.props.onSelection)
+            this.shared.wire('onSelection');
+        if (this.props.onUpdate)
+            this.shared.wire('onUpdate');
+        if (this.props.onViewportChange)
+            this.shared.wire('onViewportChange');
+        this.editor.clearHistory();
+        if (this.props.editorDidMount) {
+            this.props.editorDidMount(this.editor, this.editor.getValue(), this.initCb);
+        }
+    };
+    UnControlled.prototype.componentWillReceiveProps = function (nextProps) {
+        if (SERVER_RENDERED)
+            return;
+        var preserved = { cursor: null };
+        if (nextProps.value !== this.props.value) {
+            this.hydrated = false;
+        }
+        if (!this.props.autoCursor && this.props.autoCursor !== undefined) {
+            preserved.cursor = this.editor.getCursor();
+        }
+        this.hydrate(nextProps);
+        this.shared.apply(this.props, nextProps, preserved);
+    };
+    UnControlled.prototype.componentWillUnmount = function () {
+        if (SERVER_RENDERED)
+            return;
+        if (this.props.editorWillUnmount) {
+            this.props.editorWillUnmount(cm);
+        }
+    };
+    UnControlled.prototype.shouldComponentUpdate = function (nextProps, nextState) {
+        return !SERVER_RENDERED;
+    };
+    UnControlled.prototype.render = function () {
+        var _this = this;
+        if (SERVER_RENDERED)
+            return null;
+        var className = this.props.className ? 'react-codemirror2 ' + this.props.className : 'react-codemirror2';
+        return (React.createElement('div', { className: className, ref: function (self) { return _this.ref = self; } }));
+    };
+    return UnControlled;
+}(React.Component));
+exports.UnControlled = UnControlled;
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"codemirror":2,"react":49}],38:[function(require,module,exports){
 (function (process){
 /** @license React v16.0.0
@@ -20054,5 +31299,5 @@
 
 }).call(this,require('_process'))
-},{"_process":26,"fbjs/lib/EventListener":7,"fbjs/lib/ExecutionEnvironment":8,"fbjs/lib/camelizeStyleName":10,"fbjs/lib/containsNode":11,"fbjs/lib/emptyFunction":12,"fbjs/lib/emptyObject":13,"fbjs/lib/focusNode":14,"fbjs/lib/getActiveElement":15,"fbjs/lib/hyphenateStyleName":17,"fbjs/lib/invariant":18,"fbjs/lib/performanceNow":22,"fbjs/lib/shallowEqual":23,"fbjs/lib/warning":24,"object-assign":25,"prop-types":30,"prop-types/checkPropTypes":27,"react":44}],34:[function(require,module,exports){
+},{"_process":29,"fbjs/lib/EventListener":10,"fbjs/lib/ExecutionEnvironment":11,"fbjs/lib/camelizeStyleName":13,"fbjs/lib/containsNode":14,"fbjs/lib/emptyFunction":15,"fbjs/lib/emptyObject":16,"fbjs/lib/focusNode":17,"fbjs/lib/getActiveElement":18,"fbjs/lib/hyphenateStyleName":20,"fbjs/lib/invariant":21,"fbjs/lib/performanceNow":25,"fbjs/lib/shallowEqual":26,"fbjs/lib/warning":27,"object-assign":28,"prop-types":33,"prop-types/checkPropTypes":30,"react":49}],39:[function(require,module,exports){
 /*
  React v16.0.0
@@ -20312,5 +31557,5 @@
 unstable_deferredUpdates:Xj.deferredUpdates,flushSync:Xj.flushSync,__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED:{EventPluginHub:Jb,EventPluginRegistry:sa,EventPropagators:Th,ReactControlledComponent:nb,ReactDOMComponentTree:G,ReactDOMEventListener:L}};Cj({findFiberByHostInstance:G.getClosestInstanceFromNode,findHostInstanceByFiber:Xj.findHostInstance,bundleType:0,version:"16.0.0",rendererPackageName:"react-dom"});module.exports=ek;
 
-},{"fbjs/lib/EventListener":7,"fbjs/lib/ExecutionEnvironment":8,"fbjs/lib/containsNode":11,"fbjs/lib/emptyFunction":12,"fbjs/lib/emptyObject":13,"fbjs/lib/focusNode":14,"fbjs/lib/getActiveElement":15,"fbjs/lib/invariant":18,"fbjs/lib/shallowEqual":23,"object-assign":25,"react":44}],35:[function(require,module,exports){
+},{"fbjs/lib/EventListener":10,"fbjs/lib/ExecutionEnvironment":11,"fbjs/lib/containsNode":14,"fbjs/lib/emptyFunction":15,"fbjs/lib/emptyObject":16,"fbjs/lib/focusNode":17,"fbjs/lib/getActiveElement":18,"fbjs/lib/invariant":21,"fbjs/lib/shallowEqual":26,"object-assign":28,"react":49}],40:[function(require,module,exports){
 (function (process){
 'use strict';
@@ -20354,5 +31599,5 @@
 
 }).call(this,require('_process'))
-},{"./cjs/react-dom.development.js":33,"./cjs/react-dom.production.min.js":34,"_process":26}],36:[function(require,module,exports){
+},{"./cjs/react-dom.development.js":38,"./cjs/react-dom.production.min.js":39,"_process":29}],41:[function(require,module,exports){
 (function (process){
 'use strict';
@@ -20668,5 +31913,5 @@
 module.exports = exports['default'];
 }).call(this,require('_process'))
-},{"./Transition":37,"./utils/PropTypes":41,"_process":26,"dom-helpers/class/addClass":4,"dom-helpers/class/removeClass":6,"prop-types":30,"react":44}],37:[function(require,module,exports){
+},{"./Transition":42,"./utils/PropTypes":46,"_process":29,"dom-helpers/class/addClass":7,"dom-helpers/class/removeClass":9,"prop-types":33,"react":49}],42:[function(require,module,exports){
 (function (process){
 'use strict';
@@ -21228,5 +32473,5 @@
 exports.default = Transition;
 }).call(this,require('_process'))
-},{"./utils/PropTypes":41,"_process":26,"prop-types":30,"react":44,"react-dom":35}],38:[function(require,module,exports){
+},{"./utils/PropTypes":46,"_process":29,"prop-types":33,"react":49,"react-dom":40}],43:[function(require,module,exports){
 (function (process){
 'use strict';
@@ -21521,5 +32766,5 @@
 module.exports = exports['default'];
 }).call(this,require('_process'))
-},{"./utils/ChildMapping":40,"_process":26,"prop-types":30,"react":44}],39:[function(require,module,exports){
+},{"./utils/ChildMapping":45,"_process":29,"prop-types":33,"react":49}],44:[function(require,module,exports){
 'use strict';
 
@@ -21543,5 +32788,5 @@
   CSSTransition: _CSSTransition2.default
 };
-},{"./CSSTransition":36,"./Transition":37,"./TransitionGroup":38}],40:[function(require,module,exports){
+},{"./CSSTransition":41,"./Transition":42,"./TransitionGroup":43}],45:[function(require,module,exports){
 'use strict';
 
@@ -21633,5 +32878,5 @@
   return childMapping;
 }
-},{"react":44}],41:[function(require,module,exports){
+},{"react":49}],46:[function(require,module,exports){
 'use strict';
 
@@ -21682,5 +32927,5 @@
   exitActive: _propTypes2.default.string
 })]);
-},{"prop-types":30}],42:[function(require,module,exports){
+},{"prop-types":33}],47:[function(require,module,exports){
 (function (process){
 /** @license React v16.0.0
@@ -23384,5 +34629,5 @@
 
 }).call(this,require('_process'))
-},{"_process":26,"fbjs/lib/emptyFunction":12,"fbjs/lib/emptyObject":13,"fbjs/lib/invariant":18,"fbjs/lib/warning":24,"object-assign":25,"prop-types/checkPropTypes":27}],43:[function(require,module,exports){
+},{"_process":29,"fbjs/lib/emptyFunction":15,"fbjs/lib/emptyObject":16,"fbjs/lib/invariant":21,"fbjs/lib/warning":27,"object-assign":28,"prop-types/checkPropTypes":30}],48:[function(require,module,exports){
 /*
  React v16.0.0
@@ -23409,5 +34654,5 @@
 module.exports={Children:{map:S.map,forEach:S.forEach,count:S.count,toArray:S.toArray,only:function(a){G.isValidElement(a)?void 0:t("143");return a}},Component:B.Component,PureComponent:B.PureComponent,unstable_AsyncComponent:B.AsyncComponent,createElement:G.createElement,cloneElement:G.cloneElement,isValidElement:G.isValidElement,createFactory:G.createFactory,version:"16.0.0",__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED:{ReactCurrentOwner:C,assign:f}};
 
-},{"fbjs/lib/emptyFunction":12,"fbjs/lib/emptyObject":13,"fbjs/lib/invariant":18,"object-assign":25}],44:[function(require,module,exports){
+},{"fbjs/lib/emptyFunction":15,"fbjs/lib/emptyObject":16,"fbjs/lib/invariant":21,"object-assign":28}],49:[function(require,module,exports){
 (function (process){
 'use strict';
@@ -23420,5 +34665,5 @@
 
 }).call(this,require('_process'))
-},{"./cjs/react.development.js":42,"./cjs/react.production.min.js":43,"_process":26}],45:[function(require,module,exports){
+},{"./cjs/react.development.js":47,"./cjs/react.production.min.js":48,"_process":29}],50:[function(require,module,exports){
 "use strict";
 
@@ -23451,4 +34696,10 @@
 		languageMap: PT.object.isRequired
 	},
+
+	getInitialState: function getInitialState() {
+		return {
+			viewSelected: false };
+	},
+
 
 	toggleSelection: function toggleSelection(corpus, e) {
@@ -23461,4 +34712,21 @@
 	},
 
+	toggleViewSelected: function toggleViewSelected(evt) {
+		this.setState(function (st) {
+			return { viewSelected: !st.viewSelected };
+		});
+	},
+	toggleShowDisabled: function toggleShowDisabled(evt) {
+		this.setState(function (st) {
+			return { showDisabled: !st.showDisabled };
+		});
+	},
+
+
+	toggleDescExpansion: function toggleDescExpansion(corpus) {
+		corpus.descExpanded = !corpus.descExpanded;
+		this.props.corpora.update();
+	},
+
 	toggleExpansion: function toggleExpansion(corpus) {
 		corpus.expanded = !corpus.expanded;
@@ -23467,6 +34735,7 @@
 
 	selectAll: function selectAll(value) {
+		// select all _visible_
 		this.props.corpora.recurse(function (c) {
-			c.selected = value;
+			c.visible ? c.selected = value : false;
 		});
 		this.props.corpora.update();
@@ -23579,5 +34848,5 @@
 		return React.createElement(
 			"div",
-			{ className: "expansion-handle", style: {} },
+			{ className: "expansion-handle", onClick: this.toggleExpansion.bind(this, corpus) },
 			React.createElement(
 				"a",
@@ -23598,11 +34867,27 @@
 	},
 
+	shouldShowItem: function shouldShowItem(level, corpus) {
+		if (this.state.viewSelected && !corpus.selected) {
+			return false;
+		}
+		if (!this.state.showDisabled && !corpus.visible) {
+			return false;
+		}
+		// normal search filter.
+		if (level === 0 && corpus.priority <= 0) {
+			return false;
+		}
+
+		return true;
+	},
 	renderFilteredMessage: function renderFilteredMessage() {
+		var _this = this;
+
 		var total = 0;
 		var visible = 0;
 		this.props.corpora.recurse(function (corpus) {
-			if (corpus.visible) {
+			if (corpus.visible || _this.state.showDisabled) {
 				total++;
-				if (corpus.priority > 0) {
+				if (_this.shouldShowItem(0, corpus)) {
 					visible++;
 				}
@@ -23611,4 +34896,7 @@
 		if (visible === total) {
 			return false;
+		}
+		if (visible === 0) {
+			return false; // we do have an "empty" message anyway
 		}
 		return React.createElement(
@@ -23623,7 +34911,8 @@
 	},
 
+
 	renderCorpus: function renderCorpus(level, minmaxp, corpus) {
-		if (!corpus.visible || corpus.priority <= 0) {
-			return false;
+		if (!this.shouldShowItem(level, corpus)) {
+			return;
 		}
 
@@ -23634,5 +34923,5 @@
 		var color = minmaxp[0] === minmaxp[1] ? 'transparent' : 'hsl(' + hue + ', 50%, 50%)';
 		var priorityStyle = { paddingBottom: 4, paddingLeft: 2, borderBottom: '3px solid ' + color };
-		var expansive = corpus.expanded ? { overflow: 'hidden' } : { whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' };
+		var expansive = corpus.descExpanded ? { overflow: 'hidden' } : { whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' };
 		return React.createElement(
 			"div",
@@ -23640,5 +34929,5 @@
 			React.createElement(
 				"div",
-				{ className: "row corpus", onClick: this.toggleExpansion.bind(this, corpus) },
+				{ className: "row corpus", onClick: this.toggleDescExpansion.bind(this, corpus) },
 				React.createElement(
 					"div",
@@ -23702,6 +34991,36 @@
 	},
 
+	renderCorpList: function renderCorpList() {
+		var _this2 = this;
+
+		var minmaxp = this.getMinMaxPriority();
+
+		var corpListRender = [];
+
+		// this is so we get a non-undefined items .length in corpListRender.
+		this.props.corpora.corpora.forEach(function (c) {
+			var rend = _this2.renderCorpus(0, minmaxp, c);
+			if (rend) corpListRender.push(rend);
+		});
+
+		return React.createElement(
+			"div",
+			{ className: "corpusview-corpora" },
+			corpListRender.length > 0 ? corpListRender : React.createElement(
+				"h3",
+				{ className: "aligncenter" },
+				this.state.viewSelected ? "No collections selected yet!" : "No collections found."
+			)
+		);
+	},
 	render: function render() {
-		var minmaxp = this.getMinMaxPriority();
+		var selectedCount = 0;
+		//var disabledCount = 0;
+		this.props.corpora.recurse(function (c) {
+			if (c.selected && c.visible) selectedCount++;
+			//if (c.selected) selectedCount++;
+			//if (!c.visible) disabledCount++;
+		});
+
 		return React.createElement(
 			"div",
@@ -23712,9 +35031,16 @@
 				React.createElement(
 					"div",
-					{ className: "float-left inline" },
+					{ className: "float-left inline corpusview-filter-buttons" },
 					React.createElement(
-						"h3",
-						{ style: { marginTop: 10 } },
-						this.props.corpora.getSelectedMessage()
+						"div",
+						{ className: "btn-group btn-group-toggle" },
+						React.createElement(
+							"label",
+							{ className: "btn btn-light btn " + (this.state.viewSelected ? 'active' : 'inactive'), onClick: this.toggleViewSelected, title: "View selected collections" },
+							React.createElement("span", { className: this.state.viewSelected ? "glyphicon glyphicon-check" : "glyphicon glyphicon-unchecked" }),
+							" View selected (",
+							selectedCount,
+							")"
+						)
 					)
 				),
@@ -23744,5 +35070,5 @@
 				)
 			),
-			this.props.corpora.corpora.map(this.renderCorpus.bind(this, 0, minmaxp))
+			this.renderCorpList()
 		);
 	}
@@ -23751,5 +35077,5 @@
 module.exports = CorpusView;
 
-},{"./searchcorpusbox.jsx":56,"classnames":1,"create-react-class":3,"prop-types":30}],46:[function(require,module,exports){
+},{"./searchcorpusbox.jsx":61,"classnames":1,"create-react-class":6,"prop-types":33}],51:[function(require,module,exports){
 "use strict";
 
@@ -23810,5 +35136,5 @@
 module.exports = EmbeddedFooter;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30}],47:[function(require,module,exports){
+},{"classnames":1,"create-react-class":6,"prop-types":33}],52:[function(require,module,exports){
 "use strict";
 
@@ -23874,5 +35200,5 @@
 module.exports = ErrorPane;
 
-},{"./jqueryfade.jsx":49,"classnames":1,"create-react-class":3,"prop-types":30,"react-transition-group":39}],48:[function(require,module,exports){
+},{"./jqueryfade.jsx":54,"classnames":1,"create-react-class":6,"prop-types":33,"react-transition-group":44}],53:[function(require,module,exports){
 "use strict";
 
@@ -23962,5 +35288,5 @@
 module.exports = Footer;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30}],49:[function(require,module,exports){
+},{"classnames":1,"create-react-class":6,"prop-types":33}],54:[function(require,module,exports){
 "use strict";
 
@@ -24000,5 +35326,5 @@
 module.exports = JQueryFade;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30}],50:[function(require,module,exports){
+},{"classnames":1,"create-react-class":6,"prop-types":33}],55:[function(require,module,exports){
 "use strict";
 
@@ -24149,5 +35475,5 @@
 module.exports = LanguageSelector;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30,"react-addons-linked-state-mixin":32}],51:[function(require,module,exports){
+},{"classnames":1,"create-react-class":6,"prop-types":33,"react-addons-linked-state-mixin":35}],56:[function(require,module,exports){
 "use strict";
 
@@ -24239,5 +35565,5 @@
 module.exports = Modal;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30}],52:[function(require,module,exports){
+},{"classnames":1,"create-react-class":6,"prop-types":33}],57:[function(require,module,exports){
 "use strict";
 
@@ -24313,5 +35639,5 @@
 module.exports = Panel;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30}],53:[function(require,module,exports){
+},{"classnames":1,"create-react-class":6,"prop-types":33}],58:[function(require,module,exports){
 "use strict";
 
@@ -24328,476 +35654,1085 @@
 var _createReactClass2 = _interopRequireDefault(_createReactClass);
 
+var _reactAddonsPureRenderMixin = require("react-addons-pure-render-mixin");
+
+var _reactAddonsPureRenderMixin2 = _interopRequireDefault(_reactAddonsPureRenderMixin);
+
 var _reactTransitionGroup = require("react-transition-group");
 
+var _reactCodemirror = require("react-codemirror2");
+
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
+require('codemirror/mode/fcs-ql/fcs-ql');
+require('codemirror/mode/javascript/javascript');
+
 var PT = _propTypes2.default;
 
+function nextId() {
+    return nextId.id++;
+}
+nextId.id = 0;
+
 var QueryInput = (0, _createReactClass2.default)({
-	displayName: "QueryInput",
-
-	//fixme! - class QueryInput extends React.Component {
-	propTypes: {
-		searchedLanguage: PT.array,
-		queryTypeId: PT.string.isRequired,
-		query: PT.string,
-		embedded: PT.bool.isRequired,
-		placeholder: PT.string,
-		onChange: PT.func.isRequired,
-		onQuery: PT.func.isRequired,
-		onKeyDown: PT.func.isRequired
-	},
-
-	render: function render() {
-		//if (this.props.queryTypeId == "cql") {
-		return React.createElement("input", { className: "form-control input-lg search",
-			id: "query-cql", name: "query-cql", type: "text",
-			value: this.props.query, placeholder: this.props.placeholder,
-			tabIndex: "1", onChange: this.props.onChange
-			//onQuery={this.props.onQuery}
-			, onKeyDown: this.props.onKeyDown,
-			ref: "cqlOrEmbeddedQuery" });
-		// } else if (this.props.embedded && this.props.queryTypeId == "fcs") {
-		//     return (
-		// 	<textarea className="form-control input-lg search"
-		// 	       id="query-fcs" name="query-fcs"
-		// 	       type="text" rows="1"
-		// 	       value={this.props.query} placeholder={this.props.placeholder}
-		// 	       tabIndex="1" onChange={this.props.onChange}
-		// 	       //onQuery={this.props.onQuery}
-		// 	       onKeyDown={this.props.onKeyDown}
-		// 	       ref="fcsOrEmbeddedQuery" />
-		//     );
-		// }
-		// return (<div id="adv_query_input_group" className="input-group-addon">
-		// 	    <ADVTokens
-		//                 query={this.props.query}
-		//                 ref="fcsGQB"
-		//             />
-		// </div>);
-	}
+    displayName: "QueryInput",
+
+    //fixme! - class QueryInput extends React.Component {
+    propTypes: {
+        searchedLanguage: PT.array,
+        queryTypeId: PT.string.isRequired,
+        query: PT.string,
+        embedded: PT.bool.isRequired,
+        placeholder: PT.string,
+        onQueryChange: PT.func.isRequired,
+        onKeyDown: PT.func.isRequired
+    },
+
+    render: function render() {
+        var _this = this;
+
+        if (this.props.queryTypeId == "cql") {
+            return React.createElement("input", { className: "form-control input-lg search",
+                id: "query-cql", name: "query-cql", type: "text",
+                value: this.props.query, placeholder: this.props.placeholder,
+                tabIndex: "1", onChange: function onChange(evt) {
+                    return _this.props.onQueryChange(evt.target.value);
+                }
+                //onQuery={this.props.onQuery}
+                , onKeyDown: this.props.onKeyDown,
+                ref: "cqlOrEmbeddedQuery" })
+            /*
+            //		     <CodeMirror
+            //		         value={this.props.placeholder || this.props.query}
+            //		         options={{
+            //		             mode: 'fcs-ql',
+            //		             theme: 'default',
+            //		             lineNumbers: false,
+            //		             matchBrackets: true,
+            //		             viewportMargin: 1
+            //		         }}
+            //		         className="form-control input-lg search"
+            //		         onBeforeChange={(editor, data, value) => {
+            //		             this.setState({value});
+            //		         }}
+            //		         onChange={(editor, data, value) => {
+            //		             this.props.onChange(value);
+            //		         }}
+            //		         onQuery={this.props.onQuery}
+            //		         onKeyDown={(editor, event) => {
+            //		             this.props.onKeyDown(editor, event)
+            //		         }}
+            //		         ref="cqlOrEmbeddedQuery"
+            //		         >
+            //		      </CodeMirror>
+                  */
+            ;
+        } else if (this.props.embedded && this.props.queryTypeId == "fcs") {
+            return React.createElement("textarea", { className: "form-control input-lg search",
+                id: "query-fcs", name: "query-fcs",
+                type: "text", rows: "1",
+                value: this.props.query, placeholder: this.props.placeholder,
+                tabIndex: "1", onChange: function onChange(evt) {
+                    return _this.props.onQueryChange(evt.target.value);
+                }
+                //onQuery={this.props.onQuery}
+                , onKeyDown: this.props.onKeyDown,
+                ref: "fcsOrEmbeddedQuery" });
+        }
+        return React.createElement(
+            "div",
+            { id: "adv_query_input_group" },
+            React.createElement(ADVTokens, {
+                query: this.props.query,
+                ref: "fcsGQB",
+                onQueryChange: this.props.onQueryChange
+            })
+        );
+    }
 });
 
 var ADVTokens = (0, _createReactClass2.default)({
-	displayName: "ADVTokens",
-
-
-	propTypes: {
-		query: PT.string
-	},
-
-	getInitialState: function getInitialState() {
-		return {
-			tokenCounter: 1,
-			tokens: ["token1"]
-		};
-	},
-
-	addADVToken: function addADVToken() {
-		var i = this.state.tokenCounter + 1;
-		this.state.tokens.push('token' + i);
-		this.setState({ tokenCounter: i, tokens: this.state.tokens });
-	},
-
-	removeADVToken: function removeADVToken(id) {
-		var tokens = this.state.tokens;
-		var i = tokens.indexOf(id);
-		if (tokens.length > 1) {
-			var one = tokens;
-			var two = one.slice(0, i - 1).concat(one.slice(i));;
-			this.setState({ tokens: two });
-		}
-	},
-
-	render: function render() {
-		var i = 0;
-		var tokens = this.state.tokens.map(function (token, i) {
-			return React.createElement(
-				_reactTransitionGroup.CSSTransition,
-				{ key: i, classNames: "token", timeout: { enter: 250, exit: 250 } },
-				React.createElement(ADVToken, {
-					key: token,
-					parentToken: token,
-					handleRemoveADVToken: this.removeADVToken })
-			);
-		}.bind(this));
-
-		return React.createElement(
-			"div",
-			null,
-			React.createElement(
-				_reactTransitionGroup.TransitionGroup,
-				null,
-				tokens
-			),
-			React.createElement(
-				"button",
-				{ className: "btn btn-xs btn-default image_button insert_token", type: "button", onClick: this.addADVToken, ref: "addToken" },
-				React.createElement("i", { className: "glyphicon glyphicon-plus" })
-			)
-		);
-	}
+    displayName: "ADVTokens",
+
+
+    propTypes: {
+        query: PT.string, // initial state query. If you want to set a new one, change the 'key' prop on ADVTokens.
+        onQueryChange: PT.func.isRequired
+    },
+
+    getDefaultProps: function getDefaultProps() {
+        return {
+            query: '[ word = "Elefant" ]'
+        };
+    },
+
+
+    getInitialState: function getInitialState() {
+        var _this2 = this;
+
+        this.queryStrCache = {};
+
+        console.log('ADVTokens:', this.props.query);
+
+        var match = queryToTokens(this.props.query);
+        console.log('ADVTokens 2:', match);
+        if (match === null) {
+            return { tokens: ['token-' + nextId()] };
+        }
+
+        var tokens = [];
+        match.forEach(function (m) {
+            var id = 'token-' + nextId();
+            tokens.push(id);
+            _this2.queryStrCache[id] = m;
+        });
+
+        return { tokens: tokens };
+    },
+
+    addADVToken: function addADVToken() {
+        this.setState(function (oldSt) {
+            oldSt.tokens.push('token-' + nextId());
+            return { tokens: oldSt.tokens };
+        });
+    },
+
+    removeADVToken: function removeADVToken(id) {
+        var _this3 = this;
+
+        this.setState(function (oldSt) {
+            delete _this3.queryStrCache[id];
+            oldSt.tokens.splice(oldSt.tokens.indexOf(id), 1);
+            return { tokens: oldSt.tokens };
+        }, this.fireQueryChange);
+    },
+
+    fireQueryChange: function fireQueryChange() {
+        var _this4 = this;
+
+        var tokenParts = this.state.tokens.map(function (id) {
+            return _this4.queryStrCache[id];
+        });
+        var queryString = tokenParts.join(' ');
+        this.props.onQueryChange(queryString);
+    },
+    onQueryChange: function onQueryChange(tokenId, queryStr) {
+        this.queryStrCache[tokenId] = queryStr;
+        this.fireQueryChange();
+    },
+
+
+    render: function render() {
+        var _this5 = this;
+
+        var i = 0;
+        var tokens = this.state.tokens.map(function (tokenId, i) {
+            return React.createElement(
+                _reactTransitionGroup.CSSTransition,
+                { key: tokenId, classNames: "token", timeout: { enter: 250, exit: 250 } },
+                React.createElement(ADVToken, {
+                    query: _this5.queryStrCache[tokenId],
+                    onQueryChange: function onQueryChange(qs) {
+                        return _this5.onQueryChange(tokenId, qs);
+                    },
+                    handleRemoveADVToken: function handleRemoveADVToken() {
+                        return _this5.removeADVToken(tokenId);
+                    } })
+            );
+        });
+
+        return React.createElement(
+            "div",
+            { id: "adv-tokens" },
+            React.createElement(
+                _reactTransitionGroup.TransitionGroup,
+                null,
+                tokens
+            ),
+            React.createElement(
+                "button",
+                { className: "btn btn-xs btn-default image_button insert_token", type: "button", onClick: this.addADVToken },
+                React.createElement("i", { className: "glyphicon glyphicon-plus" })
+            )
+        );
+    }
 });
 
 var ADVToken = (0, _createReactClass2.default)({
-	displayName: "ADVToken",
-
-	propTypes: {
-		parentToken: PT.string.isRequired,
-		handleRemoveADVToken: PT.func.isRequired
-	},
-	render: function render() {
-		return React.createElement(
-			"div",
-			{ className: "token query_token inline btn-group", style: { display: "inline-block" } },
-			React.createElement(
-				"div",
-				{ className: "token_header" },
-				React.createElement(
-					"button",
-					{ className: "btn btn-xs btn-default image_button close_btn", type: "button", onClick: this.props.handleRemoveADVToken(this.props.parentToken), ref: "removeToken" },
-					React.createElement("i", { className: "glyphicon glyphicon-remove-circle" })
-				),
-				React.createElement("div", { style: { clear: "both" } })
-			),
-			React.createElement(
-				"div",
-				{ className: "args" },
-				React.createElement(ANDQueryArgs, null),
-				React.createElement("div", { className: "lower_footer" })
-			)
-		);
-	}
+    displayName: "ADVToken",
+
+    propTypes: {
+        query: PT.string,
+        onQueryChange: PT.func.isRequired,
+        handleRemoveADVToken: PT.func.isRequired
+    },
+
+    render: function render() {
+        return React.createElement(
+            "div",
+            { className: "token query_token inline btn-group", style: { display: "inline-block" } },
+            React.createElement(
+                "div",
+                { className: "token_header" },
+                React.createElement(
+                    "span",
+                    { className: "image_button close_btn", type: "button", onClick: this.props.handleRemoveADVToken, ref: "removeToken" },
+                    React.createElement("i", { className: "glyphicon glyphicon-remove-circle" })
+                ),
+                React.createElement("div", { style: { clear: "both" } })
+            ),
+            React.createElement(
+                "div",
+                { className: "args" },
+                React.createElement(ANDQueryArgs, { onQueryChange: this.props.onQueryChange, query: this.props.query }),
+                React.createElement("div", { className: "lower_footer" })
+            )
+        );
+    }
 });
 
 var ADVTokenMenu = (0, _createReactClass2.default)({
-	displayName: "ADVTokenMenu",
-
-	getInitialState: function getInitialState() {
-		return { "hideRepeatMenu": true };
-	},
-
-	toggleRepeatMenu: function toggleRepeatMenu(e) {
-		this.setState({ "hideRepeatMenu": !this.state.hideRepeatMenu });
-		e.preventDefault();
-	},
-
-	render: function render() {
-		return React.createElement(
-			"div",
-			null,
-			React.createElement(
-				"button",
-				{ className: "btn btn-xs btn-default image_button repeat_menu", onClick: this.toggleRepeatMenu, ref: "repeatMenu" },
-				React.createElement("i", { className: "fa fa-cog" })
-			),
-			React.createElement(
-				"div",
-				{ id: "repeatMenu", className: "repeat hide-" + this.state.hideRepeatMenu },
-				React.createElement(
-					"span",
-					null,
-					"repeat"
-				),
-				React.createElement("input", { type: "number", id: "repeat1", value: this.state.repeat1, ref: "repeat1" }),
-				React.createElement(
-					"span",
-					null,
-					"to"
-				),
-				React.createElement("input", { type: "number", id: "repeat2", value: this.state.repeat2, ref: "repeat2" }),
-				React.createElement(
-					"span",
-					null,
-					"times"
-				)
-			)
-		);
-	}
+    displayName: "ADVTokenMenu",
+
+    mixins: [_reactAddonsPureRenderMixin2.default],
+
+    propTypes: {
+        onChange: PT.func.isRequired,
+        repeat1: PT.string,
+        repeat2: PT.string
+    },
+
+    getInitialState: function getInitialState() {
+        var repeat1 = this.props.repeat1 || '';
+        var repeat2 = this.props.repeat2 || '';
+        return {
+            repeat1: repeat1,
+            repeat2: repeat2,
+            hideMenu: repeat1 || repeat2 ? false : true,
+            isStart: false,
+            isEnd: false
+        };
+    },
+
+    getMenuState: function getMenuState() {
+        if (this.state.hideMenu) {
+            return {};
+        } else {
+            return $.extend({}, this.state); // copy of state
+        }
+    },
+
+
+    toggleRepeatMenu: function toggleRepeatMenu(e) {
+        this.setState(function (st) {
+            return { hideMenu: !st.hideMenu };
+        });
+    },
+    toggleStart: function toggleStart(e) {
+        this.setState(function (st) {
+            return { isStart: !st.isStart };
+        });
+    },
+    toggleEnd: function toggleEnd(e) {
+        this.setState(function (st) {
+            return { isEnd: !st.isEnd };
+        });
+    },
+    componentDidMount: function componentDidMount() {
+        // make this compoent controlled to so that this awkward ref.getMenuState() stuff can be removed
+        this.props.onChange(this.getMenuState());
+    },
+    componentDidUpdate: function componentDidUpdate() {
+        // safe because of pure render mixin: will only update on state change.
+        this.props.onChange(this.getMenuState());
+    },
+
+
+    render: function render() {
+        var _this6 = this;
+
+        return React.createElement(
+            "div",
+            { id: "ADVtokenMenu" },
+            React.createElement(
+                "button",
+                { className: "btn btn-xs btn-default image_button repeat_menu", onClick: this.toggleRepeatMenu, ref: "repeatMenu" },
+                React.createElement("i", { className: "fa fa-cog" })
+            ),
+            React.createElement(
+                "div",
+                { id: "ADVtokenMenu-items", className: "hide-" + this.state.hideMenu },
+                React.createElement(
+                    "div",
+                    { id: "repeatMenu", className: "repeat" },
+                    React.createElement(
+                        "span",
+                        null,
+                        "Repeat"
+                    ),
+                    React.createElement("input", { type: "text", id: "repeat1", value: this.state.repeat1, onChange: function onChange(evt) {
+                            return _this6.setState({ repeat1: evt.target.value });
+                        }, ref: "repeat1" }),
+                    React.createElement(
+                        "span",
+                        null,
+                        "to"
+                    ),
+                    React.createElement("input", { type: "text", id: "repeat2", value: this.state.repeat2, onChange: function onChange(evt) {
+                            return _this6.setState({ repeat2: evt.target.value });
+                        }, ref: "repeat2" }),
+                    React.createElement(
+                        "span",
+                        null,
+                        "times"
+                    )
+                ),
+                React.createElement(
+                    "div",
+                    { id: "start-end-menu" },
+                    React.createElement(
+                        "div",
+                        null,
+                        React.createElement(
+                            "label",
+                            null,
+                            React.createElement("input", { type: "checkbox", checked: this.state.isStart, onChange: this.toggleStart }),
+                            " Sentence start"
+                        )
+                    ),
+                    React.createElement(
+                        "div",
+                        null,
+                        React.createElement(
+                            "label",
+                            null,
+                            React.createElement("input", { type: "checkbox", checked: this.state.isEnd, onChange: this.toggleEnd }),
+                            " Sentence end"
+                        )
+                    )
+                )
+            )
+        );
+    }
 });
 
 var ANDQueryArgs = (0, _createReactClass2.default)({
-	displayName: "ANDQueryArgs",
-
-
-	getInitialState: function getInitialState() {
-		return {
-			andCounter: 1,
-			ands: ["and1"]
-		};
-	},
-
-	setADVTokenLayer: function setADVTokenLayer(layer) {
-		//fixme! - check agains valid layers
-		return;
-	},
-
-	addADVAnd: function addADVAnd() {
-		var i = this.state.andCounter + 1;
-		this.state.ands.push('and' + i);
-		this.setState({ andCounter: i, ands: this.state.ands });
-	},
-
-	removeADVAnd: function removeADVAnd(id) {
-		var ands = this.state.ands;
-		var i = ands.indexOf(id);
-		if (ands.length > 1) {
-			var one = ands;
-			var two = one.slice(0, i - 1).concat(one.slice(i));;
-			this.setState({ ands: two });
-		}
-	},
-
-	renderANDTokenFooter: function renderANDTokenFooter() {
-		return React.createElement(
-			"div",
-			{ className: "token_footer" },
-			React.createElement(
-				"button",
-				{ className: "btn btn-xs btn-default image_button insert_arg", onClick: this.addADVAnd, ref: "addAndButton" },
-				React.createElement("i", { className: "glyphicon glyphicon-plus" })
-			),
-			React.createElement(ADVTokenMenu, null),
-			React.createElement("div", { style: { clear: "both" } })
-		);
-	},
-
-	renderANDQueryArg: function renderANDQueryArg(and) {
-		return React.createElement(
-			"div",
-			{ className: "and query_arg" },
-			React.createElement(
-				"span",
-				{ className: "hidden" },
-				"and"
-			),
-			React.createElement(ANDQueryORArgs, {
-				numAnds: this.state.ands.length,
-				parentAnd: and,
-				handleRemoveADVAnd: this.removeADVAnd })
-		);
-	},
-
-	render: function render() {
-		var andQueryArgs = this.state.ands.map(function (and, i) {
-			return React.createElement(
-				_reactTransitionGroup.CSSTransition,
-				{ key: i, classNames: "fade", timeout: { enter: 200, exit: 200 } },
-				React.createElement(
-					"div",
-					{ key: and },
-					this.renderANDQueryArg(and)
-				)
-			);
-		}.bind(this));
-		return React.createElement(
-			"div",
-			null,
-			React.createElement(
-				_reactTransitionGroup.TransitionGroup,
-				null,
-				andQueryArgs
-			),
-			this.renderANDTokenFooter()
-		);
-	}
+    displayName: "ANDQueryArgs",
+
+    propTypes: {
+        query: PT.string,
+        onQueryChange: PT.func.isRequired
+    },
+
+    getInitialState: function getInitialState() {
+        var _this7 = this;
+
+        this.queryStrCache = {};
+
+        console.log('ANDQueryArgs:', this.props.query);
+
+        var repeat1, repeat2;
+        var qlean = this.props.query;
+        if (qlean) {
+            var repeatMatch = qlean.match(/{ *(\d)* *(?:, *(\d)*)? *} *$/);
+
+            if (repeatMatch !== null) {
+                repeat1 = repeatMatch[1];
+                repeat2 = repeatMatch[2] || repeat1;
+                qlean = qlean.substring(0, qlean.length - repeatMatch[0].length);
+            }
+
+            // replace token's [ and ]
+            qlean = qlean.replace(/^\s*\[\s*/, '').replace(/\s*\]\s*$/, '');
+        }
+
+        var match = queryToANDArgs(qlean);
+        console.log('ANDQueryArgs 2:', match);
+        if (match === null) {
+            return {
+                ands: ["and-" + nextId()]
+            };
+        }
+
+        var ands = [];
+        match.forEach(function (m) {
+            var id = 'and-' + nextId();
+            ands.push(id);
+            _this7.queryStrCache[id] = m;
+        });
+
+        return {
+            ands: ands,
+            repeat1: repeat1,
+            repeat2: repeat2
+        };
+    },
+
+    addADVAnd: function addADVAnd() {
+        var _this8 = this;
+
+        this.setState(function (oldSt) {
+            oldSt.ands.push('and-' + nextId());
+            return { ands: _this8.state.ands };
+        });
+    },
+
+    removeADVAnd: function removeADVAnd(id) {
+        var _this9 = this;
+
+        this.setState(function (oldSt) {
+            delete _this9.queryStrCache[id];
+            oldSt.ands.splice(oldSt.ands.indexOf(id), 1);
+            return { ands: oldSt.ands };
+        }, this.fireQueryChange);
+    },
+
+    onMenuChange: function onMenuChange(menust) {
+        var _this10 = this;
+
+        this.setState({
+            menuState_isStart: menust.isStart,
+            menuState_isEnd: menust.isEnd,
+            menuState_repeat1: menust.repeat1,
+            menuState_repeat2: menust.repeat2
+        }, function () {
+            return _this10.fireQueryChange();
+        });
+    },
+    fireQueryChange: function fireQueryChange() {
+        var _this11 = this;
+
+        var andParts = this.state.ands.map(function (id) {
+            return _this11.queryStrCache[id];
+        });
+
+        if (this.state.menuState_isStart) {
+            andParts.push('lbound(sentence)');
+        }
+        if (this.state.menuState_isEnd) {
+            andParts.push('rbound(sentence)');
+        }
+
+        var queryString = andParts.length >= 2 ? andParts.join(' & ') : andParts[0];
+        queryString = "[ " + queryString + " ]";
+
+        if (this.state.menuState_repeat1 || this.state.menuState_repeat2) {
+            queryString = queryString + '{' + (this.state.menuState_repeat1 || this.state.menuState_repeat2) + ',' + (this.state.menuState_repeat2 || this.state.menuState_repeat1) + '}';
+        }
+
+        this.props.onQueryChange(queryString);
+    },
+    onQueryChange: function onQueryChange(andId, queryStr) {
+        this.queryStrCache[andId] = queryStr;
+        this.fireQueryChange();
+    },
+
+
+    renderANDTokenFooter: function renderANDTokenFooter() {
+        var _this12 = this;
+
+        return React.createElement(
+            "div",
+            { className: "token_footer" },
+            React.createElement(
+                "button",
+                { className: "btn btn-xs btn-default image_button insert_arg", onClick: this.addADVAnd, ref: "addAndButton" },
+                React.createElement("i", { className: "glyphicon glyphicon-plus" })
+            ),
+            React.createElement(ADVTokenMenu, { ref: function ref(_ref) {
+                    return _this12.menuRef = _ref;
+                }, onChange: this.onMenuChange, repeat1: this.state.repeat1, repeat2: this.state.repeat2 }),
+            React.createElement("div", { style: { clear: "both" } })
+        );
+    },
+
+    render: function render() {
+        var _this13 = this;
+
+        var andQueryArgs = this.state.ands.map(function (andId) {
+            return React.createElement(
+                _reactTransitionGroup.CSSTransition,
+                { key: andId, classNames: "fade", timeout: { enter: 200, exit: 200 } },
+                React.createElement(
+                    "div",
+                    { className: "and query_arg" },
+                    React.createElement(
+                        "span",
+                        { className: "hidden" },
+                        "and"
+                    ),
+                    React.createElement(ANDQueryORArgs, {
+                        query: _this13.queryStrCache[andId],
+                        onQueryChange: function onQueryChange(qs) {
+                            return _this13.onQueryChange(andId, qs);
+                        },
+                        handleRemoveADVAnd: function handleRemoveADVAnd() {
+                            return _this13.removeADVAnd(andId);
+                        }
+                    })
+                )
+            );
+        });
+        return React.createElement(
+            "div",
+            null,
+            React.createElement(
+                _reactTransitionGroup.TransitionGroup,
+                null,
+                andQueryArgs
+            ),
+            this.renderANDTokenFooter()
+        );
+    }
 });
 
 var ANDQueryORArgs = (0, _createReactClass2.default)({
-	displayName: "ANDQueryORArgs",
-
-	propTypes: {
-		numAnds: PT.number.isRequired,
-		parentAnd: PT.string.isRequired,
-		handleRemoveADVAnd: PT.func.isRequired
-	},
-	getInitialState: function getInitialState() {
-		return {
-			orCounter: 1,
-			ors: [{ id: "or1", layerType: "string:lemma", placeholder: "Bagdad" }]
-		};
-	},
-
-	//shouldComponentUpdate: function (nextProps, nextState) {
-	//	return nextState.ors.length > 1; //!== this.state.ors.length;
-	//},
-
-	setADVTokenOp: function setADVTokenOp(op) {
-		//fixme! - check agains valid layers
-		return;
-	},
-
-	setADVInputDefault: function setADVInputDefault(or) {
-		//fixme! - disable SearchButton if not atleast 1 token is in the query filter
-		return;
-	},
-
-	validateADV: function validateADV(value) {
-		//fixme! - disable SearchButton if not atleast 1 token is in the query filter
-		return;
-	},
-
-	addADVOr: function addADVOr(e) {
-		var i = this.state.orCounter + 1;
-		this.state.ors.push({ id: 'or' + i, layerType: "string:pos", placeholder: "PROPN" });
-		this.setState({ orCounter: i, ors: this.state.ors });
-	},
-
-	removeADVOr: function removeADVOr(id, e) {
-		var ors = this.state.ors;
-		var i = ors.indexOf(id);
-		if (ors.length > 1) {
-			var one = ors;
-			var two = one.slice(0, i - 1).concat(one.slice(i));;
-			this.setState({ ors: two });
-		} else if (ors.length === 1 && this.props.numAnds > 1) {
-			this.props.handleRemoveADVAnd(this.props.parentAnd);
-		}
-	},
-
-	render: function render() {
-		var orArgs = this.state.ors.map(function (or, i) {
-			return React.createElement(
-				_reactTransitionGroup.CSSTransition,
-				{ key: i, classNames: "fade", timeout: { enter: 200, exit: 200 } },
-				React.createElement(ORArg, { key: or.id,
-					data: or,
-					handleRemoveADVOr: this.removeADVOr,
-					handleSetADVInputDefault: this.setADVInputDefault,
-					handleSetADVTokenOp: this.setADVTokenOp,
-					handleValidateADV: this.validateADV
-				})
-			);
-		}.bind(this));
-		return React.createElement(
-			"div",
-			null,
-			React.createElement(
-				"div",
-				{ className: "or_container" },
-				React.createElement(
-					_reactTransitionGroup.TransitionGroup,
-					null,
-					orArgs
-				)
-			),
-			React.createElement(
-				"div",
-				{ className: "arg_footer" },
-				React.createElement(
-					"span",
-					{ className: "link", onClick: this.addADVOr, ref: 'addOR' + this.props.numAnds },
-					"or"
-				),
-				React.createElement("div", { style: { clear: "both" } })
-			)
-		);
-	}
+    displayName: "ANDQueryORArgs",
+
+    propTypes: {
+        query: PT.string,
+        onQueryChange: PT.func.isRequired,
+        handleRemoveADVAnd: PT.func.isRequired
+    },
+
+    getInitialState: function getInitialState() {
+        var _this14 = this;
+
+        this.queryStrCache = {};
+
+        console.log('ANDQueryORArgs:', this.props.query);
+        var match = queryToORArgs(this.props.query);
+        console.log('ANDQueryORArgs 2:', match);
+
+        if (match === null) {
+            return {
+                ors: ["or-" + nextId()]
+            };
+        }
+
+        var ors = [];
+        match.forEach(function (m) {
+            var id = 'or-' + nextId();
+            ors.push(id);
+            _this14.queryStrCache[id] = m;
+        });
+
+        return {
+            ors: ors
+        };
+    },
+
+    validateADV: function validateADV(value) {
+        //fixme! - disable SearchButton if not atleast 1 token is in the query filter
+        return;
+    },
+
+    fireQueryChange: function fireQueryChange() {
+        var _this15 = this;
+
+        var orParts = this.state.ors.map(function (id) {
+            return _this15.queryStrCache[id];
+        });
+        var queryString = orParts.length >= 2 ? '( ' + orParts.join(' | ') + ' )' : orParts[0];
+        this.props.onQueryChange(queryString);
+    },
+
+
+    addADVOr: function addADVOr(e) {
+        var _this16 = this;
+
+        this.setState(function (oldSt) {
+            oldSt.ors.push('or-' + nextId());
+            return { ors: _this16.state.ors };
+        });
+    },
+
+    removeADVOr: function removeADVOr(id) {
+        var _this17 = this;
+
+        this.setState(function (oldSt) {
+            delete _this17.queryStrCache[id];
+            oldSt.ors.splice(oldSt.ors.indexOf(id), 1);
+            return { ors: oldSt.ors };
+        }, function () {
+            if (_this17.state.ors.length === 0) {
+                _this17.props.handleRemoveADVAnd();
+            } else {
+                _this17.fireQueryChange();
+            }
+        });
+    },
+
+    onQueryChange: function onQueryChange(orId, queryStr) {
+        this.queryStrCache[orId] = queryStr;
+        this.fireQueryChange();
+    },
+    render: function render() {
+        var _this18 = this;
+
+        var orArgs = this.state.ors.map(function (orId) {
+            return React.createElement(
+                _reactTransitionGroup.CSSTransition,
+                { key: orId, classNames: "fade", timeout: { enter: 200, exit: 200 } },
+                React.createElement(ORArg, {
+                    query: _this18.queryStrCache[orId],
+                    handleRemoveADVOr: function handleRemoveADVOr() {
+                        return _this18.removeADVOr(orId);
+                    },
+                    handleValidateADV: function handleValidateADV() {
+                        return true;
+                    },
+                    onQueryChange: function onQueryChange(qs) {
+                        return _this18.onQueryChange(orId, qs);
+                    }
+                })
+            );
+        });
+        return React.createElement(
+            "div",
+            null,
+            React.createElement(
+                "div",
+                { className: "or_container" },
+                React.createElement(
+                    _reactTransitionGroup.TransitionGroup,
+                    null,
+                    orArgs
+                )
+            ),
+            React.createElement(
+                "div",
+                { className: "arg_footer" },
+                React.createElement(
+                    "span",
+                    { className: "link", onClick: this.addADVOr },
+                    "or"
+                ),
+                React.createElement("div", { style: { clear: "both" } })
+            )
+        );
+    }
 });
 
 var ORArg = (0, _createReactClass2.default)({
-	displayName: "ORArg",
-
-	propTypes: {
-		data: PT.object.isRequired,
-		handleRemoveADVOr: PT.func.isRequired,
-		handleSetADVInputDefault: PT.func.isRequired,
-		handleSetADVTokenOp: PT.func.isRequired,
-		handleValidateADV: PT.func.isRequired
-	},
-
-	render: function render() {
-		return React.createElement(
-			"div",
-			{ className: "or or_arg" },
-			React.createElement(
-				"div",
-				{ className: "left_col" },
-				React.createElement(
-					"button",
-					{ className: "btn btn-xs btn-default image_button remove_arg", onClick: this.props.handleRemoveADVOr.bind(null, this.props.data.id), ref: 'removeADVOr_' + this.props.data.id },
-					React.createElement("i", { className: "glyphicon glyphicon-minus" })
-				)
-			),
-			React.createElement(
-				"div",
-				{ className: "right_col inline_block", style: { display: "inline-block" } },
-				" ",
-				React.createElement(
-					"div",
-					{ className: "arg_selects lemma" },
-					React.createElement(
-						"select",
-						{ className: "arg_type", onChange: this.props.handleSetADVInputDefault("or"), defaultValue: this.props.data.layerType, ref: 'ANDLayerType_' + this.props.data.id },
-						React.createElement(
-							"optgroup",
-							{ label: "word" },
-							React.createElement(
-								"option",
-								{ value: "string:word", label: "word" },
-								"word"
-							)
-						),
-						React.createElement(
-							"optgroup",
-							{ label: "wordAttribute" },
-							React.createElement(
-								"option",
-								{ value: "string:pos" },
-								"part-of-speech"
-							),
-							React.createElement(
-								"option",
-								{ value: "string:lemma" },
-								"lemma"
-							)
-						),
-						React.createElement(
-							"optgroup",
-							{ label: "textAttribute" },
-							React.createElement(
-								"option",
-								{ value: "string:_.text_language", label: "language" },
-								"language"
-							)
-						)
-					),
-					React.createElement(
-						"select",
-						{ className: "arg_opts", defaultValue: "string:contains", onChange: this.props.handleSetADVTokenOp("op") },
-						React.createElement(
-							"option",
-							{ value: "string:contains", label: "is" },
-							"is"
-						),
-						React.createElement(
-							"option",
-							{ value: "string:not contains", label: "is not" },
-							"is not"
-						)
-					)
-				),
-				React.createElement(
-					"div",
-					{ className: "arg_val_container" },
-					React.createElement("input", { id: 'inputADV_' + this.props.data.id, type: "text", defaultValue: this.props.data.placeholder, onChange: this.props.handleValidateADV, ref: 'textEntry_' + this.props.data.id })
-				),
-				React.createElement(
-					"select",
-					null,
-					React.createElement(
-						"option",
-						{ label: "PROPN", value: "string:PROPN" },
-						"Proper Noun"
-					)
-				)
-			)
-		);
-	}
+    displayName: "ORArg",
+
+    mixins: [_reactAddonsPureRenderMixin2.default],
+
+    propTypes: {
+        query: PT.string,
+        handleValidateADV: PT.func.isRequired,
+        handleRemoveADVOr: PT.func.isRequired,
+        onQueryChange: PT.func.isRequired
+    },
+
+    getInitialState: function getInitialState() {
+        console.log('ORArg:', this.props.query);
+        var qp = queryParse(this.props.query);
+        console.log('ORArg 2:', qp);
+
+        if (qp !== null) {
+            var layer = qp.layer;
+            var op = qp.op;
+            var val = qp.val;
+        }
+        return {
+            layer: layer || 'word',
+            argOpt: op || 'is',
+            argValue: val || '',
+
+            editingText: false
+        };
+    },
+    fireQueryChange: function fireQueryChange() {
+        var queryString = layerToQueryString(this.state.layer, this.state.argOpt, this.state.argValue);
+        this.props.onQueryChange(queryString);
+    },
+    onlayerChange: function onlayerChange(evt) {
+        var layer = evt.target.value;
+        this.setState(function (st) {
+            var argOpt = getLayerArgOpts(layer)[0].value;
+            var lvo = getLayerValueOptions(layer, argOpt, st.argValue);
+            var argValue = '';
+            if (lvo === undefined) argValue = '';else argValue = lvo[0].value;
+
+            return {
+                layer: layer,
+                argOpt: argOpt,
+                argValue: argValue
+            };
+        });
+    },
+    onArgOptChange: function onArgOptChange(evt) {
+        var argOpt = evt.target.value;
+        this.setState({ argOpt: argOpt });
+    },
+    onArgValueChange: function onArgValueChange(evt) {
+        var value = evt.target.value;
+        //console.log("picked arg value", value);
+
+        this.setState({ argValue: value });
+    },
+    componentDidMount: function componentDidMount() {
+        this.fireQueryChange();
+    },
+    componentDidUpdate: function componentDidUpdate(prevProps, prevState) {
+        // after state update.
+        if (prevState.layer !== this.state.layer || prevState.argOpt !== this.state.argOpt || prevState.argValue !== this.state.argValue
+        /*|| (!this.state.editingText && prevState.argValue !== this.state.argValue) // only update text-value input on field blur 
+        || (prevState.editingText !== this.state.editingText && prevState.editingText) // stopped editing text field.
+        */
+        ) {
+                this.fireQueryChange();
+            }
+    },
+    renderInput: function renderInput() {
+        var _this19 = this;
+
+        var valueOptions = getLayerValueOptions(this.state.layer, this.state.argOpt, this.state.argValue);
+
+        if (valueOptions === undefined) {
+            return React.createElement("input", { type: "text", className: "form-control",
+                value: this.state.argValue,
+                onChange: this.onArgValueChange,
+                onFocus: function onFocus() {
+                    return _this19.setState({ editingText: true });
+                },
+                onBlur: function onBlur() {
+                    return _this19.setState({ editingText: false });
+                }
+            });
+        } else {
+            return React.createElement(
+                "select",
+                { className: "form-control", value: this.state.argValue, onChange: this.onArgValueChange, onFocus: function onFocus() {
+                        return _this19.setState({ editingText: true });
+                    }, onBlur: function onBlur() {
+                        return _this19.setState({ editingText: false });
+                    } },
+                valueOptions.map(function (valOpt) {
+                    return React.createElement(
+                        "option",
+                        { value: valOpt.value },
+                        valOpt.label
+                    );
+                })
+            );
+        }
+    },
+
+
+    render: function render() {
+        return React.createElement(
+            "div",
+            { className: "or or_arg" },
+            React.createElement(
+                "div",
+                { className: "left_col" },
+                React.createElement(
+                    "button",
+                    { className: "btn btn-xs btn-default image_button remove_arg", onClick: this.props.handleRemoveADVOr },
+                    React.createElement("i", { className: "glyphicon glyphicon-minus" })
+                )
+            ),
+            React.createElement(
+                "div",
+                { className: "right_col inline_block", style: { display: "inline-block" } },
+                " ",
+                React.createElement(
+                    "div",
+                    { className: "arg_selects form-inline" },
+                    React.createElement(
+                        "select",
+                        { className: "arg_type form-control", value: this.state.layer, onChange: this.onlayerChange },
+                        layerCategories.map(function (cat) {
+                            return React.createElement(
+                                "optgroup",
+                                { label: cat.label },
+                                cat.layers.map(function (layer) {
+                                    return React.createElement(
+                                        "option",
+                                        { value: layer },
+                                        getLayerLabel(layer)
+                                    );
+                                })
+                            );
+                        })
+                    ),
+                    React.createElement(
+                        "select",
+                        { className: "arg_opts form-control", value: this.state.argOpt, onChange: this.onArgOptChange },
+                        getLayerArgOpts(this.state.layer).map(function (argOpt) {
+                            return React.createElement(
+                                "option",
+                                { value: argOpt.value },
+                                argOpt.label
+                            );
+                        })
+                    )
+                ),
+                React.createElement(
+                    "div",
+                    { className: "arg_val_container" },
+                    this.renderInput()
+                )
+            )
+        );
+    }
 });
 
+function getLayers() {
+    var layers_arr = [];
+    for (var l in layers) {
+        layers_arr.push(l);
+    }
+    return layers_arr;
+}
+
+function getLayerArgOpts(layer) {
+    return layers[layer].argOpts;
+}
+
+function isValidLayerOperator(layer, operator) {
+    return !!layers[layer].argOpts.find(function (e) {
+        return e.value === operator;
+    });
+}
+function isValidLayerValue(layer, operator, value) {
+    var valopts = getLayerValueOptions(layer);
+    if (!valopts) {
+        return true;
+    }
+    return valopts.indexOf(value) !== -1;
+}
+
+function layerToQueryString(layer, operator, value) {
+    var toStr = layers[layer].toQueryString;
+    if (!toStr) {
+        toStr = getLayerArgOpts(layer).defaultToStr;
+    }
+    if (!toStr) {
+        toStr = wordOptions.defaultToStr;
+        console.warn("layerToQueryString: couldnt find a toQueryString method!");
+    }
+    var qstr = toStr(layer, operator, value);
+    if (qstr === undefined) {
+        console.warn("layerToQueryString: qstr undefined!");
+        return 'undefined';
+    }
+    return qstr;
+}
+
+function getLayerLabel(layer) {
+    return layers[layer].label;
+}
+
+function getOperatorLabel(layer, operator) {
+    return layers[layer].argOpts[operator].label;
+}
+
+function getLayerValueOptions(layer, operator, value) {
+    var valopts = layers[layer].valueOptions;
+    if (!valopts) {
+        return;
+    }
+    if (typeof valopts === 'function') {
+        return valopts(layer, operator, value);
+    } else if (valopts.length) {
+        return valopts; // array
+    }
+}
+
+// a RE string matching a "double-quote"d string
+var quotedStringRE = /(?:"(?:\\"|[^"])*")/.source;
+
+// in: 'word = "zebra" '
+// out: ['word', '=', 'zebra']
+function queryParse(q) {
+    if (!q) return null;
+    var match = q.match(/^\s*(\w+) *(=|!=) *"((?:\\"|.)*?)"/);
+    if (match === null) {
+        return null;
+    }
+
+    var layer = match[1];
+    var op = match[2];
+    var value = match[3];
+
+    var fromStr = getLayerArgOpts(layer).fromQueryString;
+    if (!fromStr) {
+        fromStr = getLayerArgOpts(layer).defaultFromString;
+    }
+    if (!fromStr) {
+        fromStr = wordOptions.defaultFromStr;
+        log.error("queryParse: couldnt find a fromQueryString method!");
+    }
+
+    return fromStr(layer, op, value);
+}
+
+// in: '(word = "zebra" | word = "zoo" ...)'
+// out: ['word = "zebra" ', ' (word = "zoo" ...)']
+function queryToORArgs(q) {
+    if (!q) return null;
+    var match = q.trim().match(queryToORArgs.re);
+    return match;
+}
+queryToORArgs.re = RegExp('(?:' + quotedStringRE + '|[^()|])+', 'g');
+
+// in: '[word = "zebra" & (word = "zoo" ...)]'
+// out: ['word = "zebra" ', ' (word = "zoo" ...)']
+function queryToANDArgs(q) {
+    if (!q) return null;
+
+    var match = q.trim().match(queryToANDArgs.re);
+    return match;
+}
+queryToANDArgs.re = RegExp('(?:' + quotedStringRE + '|[^&])+', 'g');
+
+// in: '[word = "zebra"] [word = "zoo"]'
+// out: ['[word = "zebra"]', '[word = "zoo"]']
+function queryToTokens(q) {
+    if (!q) return null;
+    var match = q.match(queryToTokens.re);
+    return match;
+}
+queryToTokens.re = RegExp('\\[(?:' + quotedStringRE + '|.)*?\\] *(?:\\{.*?\\})?', 'g');
+
+/*To simplify matching regex filter out words within "quotemarks". This help to not stumble on any special characters that can occur there. */
+function filterWords(s, f) {
+    var filteredString = s.replace(/("(?:\\"|[^"])*")/g, function (m) {
+        filteredWords.push(m);
+        return '""';
+    });
+    var ret = f(filteredString);
+    // restore words
+
+    // return return value
+    return ret;
+}
+
+var wordOptions = [{ value: 'is', label: 'is' }, { value: 'is_not', label: 'is not' }, { value: 'contains', label: 'contains' }, { value: 'starts_with', label: 'starts with' }, { value: 'ends_with', label: 'ends with' }, { value: 'regex', label: 'regex' }, { value: 'not_regex', label: 'not regex' }];
+var liteOptions = [{ value: "is", label: "is" }, { value: "is_not", label: "is not" }];
+var setOptions = [{ value: "is", label: "is" }, { value: "is_not", label: "is not" }];
+var probabilitySetOptions = [{ value: "is", label: "highest_rank" }, { value: "is_not", label: "not_highest_rank" }, { value: "contains", label: "rank_contains" }, { value: "contains_not", label: "not_rank_contains" }];
+
+setOptions.defaultToStr = function (layer, op, val) {
+    switch (op) {
+        case 'is':
+            return layer + " = \"" + val + "\"";
+        case 'is_not':
+            return layer + " != \"" + val + "\"";
+    }
+};
+setOptions.defaultFromString = function (layer, op, val) {
+    return { layer: layer, op: op === '!=' ? 'is_not' : 'is', val: val };
+};
+
+wordOptions.defaultToStr = function (layer, op, val) {
+    var unescVal = val;
+    var val = escapeRegExp(val);
+    switch (op) {
+        case 'is':
+            return layer + " = \"" + val + "\"";
+        case 'is_not':
+            return layer + " != \"" + val + "\"";
+        case 'contains':
+            return layer + " = \".*" + val + ".*\"";
+        case 'starts_with':
+            return layer + " = \"" + val + ".*\"";
+        case 'ends_with':
+            return layer + " = \".*" + val + "\"";
+        case 'regex':
+            return layer + " = \"" + unescVal + "\"";
+        case 'not_regex':
+            return layer + " != \"" + unescVal + "\"";
+    }
+};
+wordOptions.defaultFromString = function (layer, op, val) {
+    // layer should be good. Now figure out op, and if val is escaped or not
+    if (op === '=') {
+        var strippedOfSemiRE = val.replace(/^\.\*/, '').replace(/\.\*$/, '');
+        if (strippedOfSemiRE.length !== val.length) {
+            // could be one of: startswith, contains, endswith.
+            if (!guessIfRegexp(strippedOfSemiRE)) {
+                // Ok, it is one of: startswith, contains, endswith.
+                if (val.startsWith('.*') && val.endsWith('.*')) {
+                    var op2 = 'contains';
+                } else if (val.startsWith('.*')) {
+                    op2 = 'starts_with';
+                } else if (val.endsWith('.*')) {
+                    op2 = 'ends_with';
+                } else {
+                    console.error("parsing query failed due to coding error");
+                    return null;
+                }
+                return {
+                    layer: layer,
+                    op: op2,
+                    val: unescapeRegExp(strippedOfSemiRE)
+                };
+            }
+            // its regexp.
+        }
+    }
+
+    if (guessIfRegexp(val)) {
+        // its regexp
+        return { layer: layer, op: op === '=' ? 'regex' : 'not_regex', val: val };
+    }
+
+    // its not regexp
+    return { layer: layer, op: op === '=' ? 'is' : 'is_not', val: unescapeRegExp(val) };
+};
+function guessIfRegexp(s) {
+    return !!s.match(/[^\\][-[\]{}()*+\\?.,^$|#]/); // find if it contains any unescaped regex characters
+}
+function unescapeRegExp(text) {
+    return text.replace(/\\([-[\]{}()*+?.,\\^$|#])/g, '$1');
+}
+function escapeRegExp(text) {
+    return text.replace(/[-[\]{}()*+?.,\\^$|#]/g, '\\$&');
+}
+
+var layers = {
+    'word': {
+        label: 'word',
+        argOpts: wordOptions
+    },
+    'pos': {
+        label: 'part-of-speech UD v2.0 tagset',
+        argOpts: setOptions,
+        valueOptions: [{ value: "ADJ", label: "Adjective" }, { value: "ADV", label: "Adverb" }, { value: "INTJ", label: "Interjection" }, { value: "NOUN", label: "Noun" }, { value: "PROPN", label: "Proper noun" }, { value: "VERB", label: "Verb" }, { value: "ADP", label: "Adposition" }, { value: "AUX", label: "Auxiliary" }, { value: "CCONJ", label: "Coordinating conjunction" }, { value: "DET", label: "Determiner" }, { value: "NUM", label: "Numeral" }, { value: "PART", label: "Particle" }, { value: "PRON", label: "Pronoun" }, { value: "SCONJ", label: "Subordinating conjunction" }, { value: "PUNCT", label: "Punctuation" }, { value: "SYM", label: "Symbol" }, { value: "X", label: "Other" }]
+    },
+    'lemma': {
+        label: 'lemmatization of tokens',
+        argOpts: wordOptions
+    },
+    'orth': {
+        label: 'orthographic transcription',
+        argOpts: wordOptions
+    },
+    'norm': {
+        label: 'orthographic normalization',
+        argOpts: wordOptions
+    },
+    'phonetic': {
+        label: 'phonetic transcription SAMPA',
+        argOpts: wordOptions },
+    'text': {
+        label: 'Layer only for Basic Search',
+        argOpts: wordOptions
+    },
+    '_.text_language': {
+        label: 'language',
+        argOpts: wordOptions
+    }
+};
+
+var layerCategories = [{ cat: 'word', label: 'Word', layers: ['word'] }, { cat: 'wordAttribute', label: 'Word attribute', layers: ['pos', 'lemma', 'orth', 'norm', 'phonetic', 'text'] }, { cat: 'textAttribute', label: 'Text attribute', layers: ['_.text_language'] }];
+
 module.exports = QueryInput;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30,"react-transition-group":39}],54:[function(require,module,exports){
+},{"classnames":1,"codemirror/mode/fcs-ql/fcs-ql":3,"codemirror/mode/javascript/javascript":4,"create-react-class":6,"prop-types":33,"react-addons-pure-render-mixin":36,"react-codemirror2":37,"react-transition-group":44}],59:[function(require,module,exports){
 "use strict";
 
@@ -25166,5 +37101,5 @@
 module.exports = ResultMixin;
 
-},{"classnames":1,"prop-types":30}],55:[function(require,module,exports){
+},{"classnames":1,"prop-types":33}],60:[function(require,module,exports){
 "use strict";
 
@@ -25367,5 +37302,5 @@
 module.exports = Results;
 
-},{"./panel.jsx":52,"./resultmixin.jsx":54,"classnames":1,"create-react-class":3,"prop-types":30,"react-transition-group":39}],56:[function(require,module,exports){
+},{"./panel.jsx":57,"./resultmixin.jsx":59,"classnames":1,"create-react-class":6,"prop-types":33,"react-transition-group":44}],61:[function(require,module,exports){
 "use strict";
 
@@ -25429,5 +37364,5 @@
 module.exports = SearchCorpusBox;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30}],57:[function(require,module,exports){
+},{"classnames":1,"create-react-class":6,"prop-types":33}],62:[function(require,module,exports){
 "use strict";
 
@@ -25629,5 +37564,5 @@
 module.exports = ZoomedResult;
 
-},{"./resultmixin.jsx":54,"classnames":1,"create-react-class":3,"prop-types":30,"react-transition-group":39}],58:[function(require,module,exports){
+},{"./resultmixin.jsx":59,"classnames":1,"create-react-class":6,"prop-types":33,"react-transition-group":44}],63:[function(require,module,exports){
 "use strict";
 
@@ -25677,9 +37612,9 @@
 	window.MyAggregator = window.MyAggregator || {};
 
-	var VERSION = window.MyAggregator.VERSION = "v.2.9.91-57";
-
-	var URLROOT = window.MyAggregator.URLROOT =
-	//window.location.pathname.substring(0, window.location.pathname.indexOf("/",2)) ||
-	window.location.pathname || "/Aggregator";
+	var VERSION = window.MyAggregator.VERSION = "v.3.0.0-64";
+
+	var URLROOT = window.MyAggregator.URLROOT = window.location.pathname.substring(0, window.location.pathname.indexOf("/", 2)) ||
+	//window.location.pathname ||
+	"/Aggregator";
 
 	var PT = _propTypes2.default;
@@ -26001,5 +37936,5 @@
 })();
 
-},{"./components/embeddedfooter.jsx":46,"./components/errorpane.jsx":47,"./components/footer.jsx":48,"./pages/aboutpage.jsx":59,"./pages/aggregatorpage.jsx":60,"./pages/helppage.jsx":61,"./pages/statisticspage.jsx":62,"create-react-class":3,"prop-types":30}],59:[function(require,module,exports){
+},{"./components/embeddedfooter.jsx":51,"./components/errorpane.jsx":52,"./components/footer.jsx":53,"./pages/aboutpage.jsx":64,"./pages/aggregatorpage.jsx":65,"./pages/helppage.jsx":66,"./pages/statisticspage.jsx":67,"create-react-class":6,"prop-types":33}],64:[function(require,module,exports){
 "use strict";
 
@@ -26026,4 +37961,10 @@
 						propTypes: {
 												toStatistics: PT.func.isRequired
+						},
+
+						toStatistics: function toStatistics(e) {
+												this.props.toStatistics(true);
+												e.preventDefault();
+												e.stopPropagation();
 						},
 
@@ -26084,7 +38025,5 @@
 																														React.createElement(
 																																				"button",
-																																				{ type: "button", className: "btn btn-default btn-lg", onClick: function () {
-																																																this.props.toStatistics(true);
-																																										}.bind(this) },
+																																				{ type: "button", className: "btn btn-default btn-lg", onClick: this.toStatistics },
 																																				React.createElement(
 																																										"span",
@@ -26247,5 +38186,5 @@
 																																																"a",
 																																																{ href: "https://github.com/facebook/react/blob/master/LICENSE" },
-																																																"BSD license"
+																																																"MIT license"
 																																										),
 																																										")"
@@ -26356,5 +38295,5 @@
 module.exports = AboutPage;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30}],60:[function(require,module,exports){
+},{"classnames":1,"create-react-class":6,"prop-types":33}],65:[function(require,module,exports){
 "use strict";
 
@@ -26418,4 +38357,7 @@
 
 	getInitialState: function getInitialState() {
+		var aggrContext = getQueryVariable('x-aggregation-context');
+		aggrContext = aggrContext && JSON.parse(aggrContext);
+
 		return {
 			corpora: new Corpora([], this.updateCorpora),
@@ -26423,6 +38365,7 @@
 			weblichtLanguages: [],
 			queryTypeId: getQueryVariable('queryType') || 'cql',
-			query: getQueryVariable('query') || '',
-			aggregationContext: getQueryVariable('x-aggregation-context') || '',
+			cqlQuery: (getQueryVariable('queryType') || 'cql') === 'cql' && getQueryVariable('query') || '',
+			fcsQuery: (getQueryVariable('queryType') || 'cql') === 'fcs' && getQueryVariable('query') || '',
+			aggregationContext: aggrContext || null,
 			language: this.anyLanguage,
 			languageFilter: 'byMeta',
@@ -26433,53 +38376,77 @@
 			hits: this.nohits,
 
-			zoomedCorpusHit: null,
-			_isMounted: false
+			zoomedCorpusHit: null
 		};
 	},
 
 	componentDidMount: function componentDidMount() {
-		this.setState({ _isMounted: true });
+		this._isMounted = true;
 
 		this.props.ajax({
 			url: 'rest/init',
 			success: function (json, textStatus, jqXHR) {
-				if (this.state._isMounted) {
+				if (this._isMounted) {
 					var corpora = new Corpora(json.corpora, this.updateCorpora);
+
+					// // for testing aggregation context
+					// json['x-aggregation-context'] = {
+					// 	'EKUT': ["http://hdl.handle.net/11858/00-1778-0000-0001-DDAF-D"]
+					// };
+
+					var aggregationContext = json['x-aggregation-context'] || this.state.aggregationContext;
+
+					window.MyAggregator.mode = getQueryVariable('mode') || json.mode;
 					window.MyAggregator.corpora = json.corpora;
+					window.MyAggregator.xAggregationContext = aggregationContext;
+
+					// Setting visibility, e.g. only corpora
+					// from v2.0 endpoints for fcs v2.0
+					corpora.setVisibility(this.state.queryTypeId, this.state.language[0]);
+
+					if (aggregationContext) {
+						var contextCorporaInfo = corpora.setAggregationContext(aggregationContext);
+						var unavailableCorporaHandles = contextCorporaInfo.unavailable; // list of unavailable aggregationContext
+						if (unavailableCorporaHandles.length > 0) {
+							this.props.error("Could not find requested collection handles:\n" + unavailableCorporaHandles.join('\n'));
+						}
+
+						var actuallySelectedCorpora = corpora.getSelectedIds();
+
+						if (contextCorporaInfo.selected.length !== actuallySelectedCorpora.length) {
+							if (actuallySelectedCorpora.length === 0) {
+								this.props.error("This search does not support the required collection(s), will search all collections instead"); // TODO give detailed reason its not supported.
+								corpora.recurse(function (corpus) {
+									corpus.selected = true;
+								});
+							} else {
+								var err = "Some required context collections are not supported for this search:\n";
+								err = err + contextCorpora.filter(function (c) {
+									if (actuallySelectedCorpora.indexOf(c) === -1) {
+										console.warn("Requested corpus but not available for selection", c);
+										return true;
+									}
+									return false;
+								}).map(function (c) {
+									return c.title;
+								}).join('\n');
+								this.props.error(err);
+							}
+						}
+					} else {
+						// no context set all visibl to selected as default.
+						console.log("no context set, selecting all available");
+						corpora.recurse(function (c) {
+							c.visible ? c.selected = true : null;
+						});
+					}
+
 					this.setState({
 						corpora: corpora,
 						languageMap: json.languages,
 						weblichtLanguages: json.weblichtLanguages,
-						query: this.state.query || json.query || ''
-					});
-					// // for testing aggregation context
-					// json['x-aggregation-context'] = {
-					// 	'EKUT': ["http://hdl.handle.net/11858/00-1778-0000-0001-DDAF-D"]
-					// };
-
-					if (this.state.aggregationContext && !json['x-aggregation-context']) {
-						json['x-aggregation-context'] = JSON.parse(this.state.aggregationContext);
-						console.log(json['x-aggregation-context']);
-					}
-					if (json['x-aggregation-context']) {
-						window.MyAggregator.xAggregationContext = json["x-aggregation-context"];
-						corpora.setAggregationContext(json["x-aggregation-context"]);
-						if (!corpora.getSelectedIds().length) {
-							this.props.error("Cannot find the required collection, will search all collections instead");
-							corpora.recurse(function (corpus) {
-								corpus.selected = true;
-							});
-						}
-						corpora.update();
-					}
-					// Setting visibility, e.g. only corpora
-					// from v2.0 endpoints for fcs v2.0
-					this.state.corpora.setVisibility(this.state.queryTypeId, this.state.language[0]);
-					corpora.update();
-
-					if (getQueryVariable('mode') === 'search' || json.mode === 'search') {
-						window.MyAggregator.mode = 'search';
-						this.search();
-					}
+						aggregationContext: aggregationContext
+					}, this.postInit);
+				} else {
+					console.warn("Got Aggregator init response, but not mounted!");
 				}
 			}.bind(this)
@@ -26487,12 +38454,22 @@
 	},
 
+	postInit: function postInit() {
+		if (window.MyAggregator.mode === 'search') {
+			this.search();
+		}
+	},
+
+
 	updateCorpora: function updateCorpora(corpora) {
 		this.setState({ corpora: corpora });
 	},
 
+	getCurrentQuery: function getCurrentQuery() {
+		return this.state.queryTypeId === 'fcs' ? this.state.fcsQuery : this.state.cqlQuery;
+	},
 	search: function search() {
-		var query = this.state.query;
+		var query = this.getCurrentQuery();
 		var queryTypeId = this.state.queryTypeId;
-		if (!query || this.props.embedded) {
+		if (!query || this.props.embedded && window.MyAggregator.mode !== 'search') {
 			this.setState({ hits: this.nohits, searchId: null });
 			return;
@@ -26532,4 +38509,6 @@
 		});
 	},
+
+
 	nextResults: function nextResults(corpusId) {
 		// console.log("searching next results in corpus:", corpusId);
@@ -26551,5 +38530,5 @@
 
 	refreshSearchResults: function refreshSearchResults() {
-		if (!this.state.searchId || !this.state._isMounted) {
+		if (!this.state.searchId || !this._isMounted) {
 			return;
 		}
@@ -26611,10 +38590,11 @@
 	setQueryType: function setQueryType(queryTypeId) {
 		this.state.corpora.setVisibility(queryTypeId, this.state.language[0]);
+		setQueryVariable('queryType', queryTypeId);
+		setQueryVariable('query', queryTypeId === 'cql' ? this.state.cqlQuery : this.state.fcsQuery);
 		this.setState({
 			queryTypeId: queryTypeId,
 			hits: this.nohits,
-			searchId: null,
-			displayADV: queryTypeId == "fcs" ? true : false,
-			corpora: this.state.corpora });
+			searchId: null
+		});
 	},
 
@@ -26689,10 +38669,15 @@
 	},
 
-	onQuery: function onQuery(event) {
-		this.setState({ query: event.target.value });
-	},
-
-	onADVQuery: function onADVQuery(fcsql) {
-		this.setState({ query: fcsql.target.value });
+	onQueryChange: function onQueryChange(queryStr) {
+		if (this.state.queryTypeId === 'cql') {
+			this.setState({
+				cqlQuery: queryStr || ''
+			});
+		} else {
+			this.setState({
+				fcsQuery: queryStr || ''
+			});
+		}
+		setQueryVariable('query', queryStr);
 	},
 
@@ -26700,10 +38685,4 @@
 		if (event.keyCode == 13) {
 			this.search();
-		}
-	},
-
-	handleADVKey: function handleADVKey(event) {
-		if (event.keyCode == 13) {
-			this.addADVToken();
 		}
 	},
@@ -26731,9 +38710,10 @@
 	renderSearchButtonOrLink: function renderSearchButtonOrLink() {
 		if (this.props.embedded) {
-			var query = this.state.query;
+			var query = this.getCurrentQuery();
 			var queryTypeId = this.state.queryTypeId;
 			var btnClass = (0, _classnames2.default)({
 				'btn': true,
 				'btn-default': queryTypeId === 'cql',
+				'btn-primary': true,
 				'input-lg': true
 			});
@@ -26753,5 +38733,127 @@
 	},
 
+	renderQueryInput: function renderQueryInput() {
+		var queryType = queryTypeMap[this.state.queryTypeId];
+		return React.createElement(_queryinput2.default, {
+			searchedLanguages: this.state.searchedLanguages || [multipleLanguageCode],
+			corpora: this.props.corpora,
+			queryTypeId: this.state.queryTypeId,
+			query: this.getCurrentQuery() === undefined ? queryType.searchPlaceholder : this.getCurrentQuery(),
+			embedded: this.props.embedded,
+			placeholder: queryType.searchPlaceholder,
+			onQueryChange: this.onQueryChange,
+			onKeyDown: this.handleKey });
+	},
+	renderEmbed: function renderEmbed() {
+		var queryType = queryTypeMap[this.state.queryTypeId];
+
+		return React.createElement(
+			"div",
+			{ className: "aligncenter", style: { marginLeft: 16, marginRight: 16 } },
+			React.createElement(
+				"div",
+				{ className: "input-group" },
+				React.createElement(
+					"span",
+					{ className: "input-group-addon", style: { backgroundColor: queryType.searchLabelBkColor } },
+					queryType.searchLabel
+				),
+				this.renderQueryInput(),
+				React.createElement(
+					"div",
+					{ className: "input-group-btn" },
+					this.renderSearchButtonOrLink()
+				)
+			)
+		);
+	},
+	renderGQB: function renderGQB() {
+		var queryType = queryTypeMap[this.state.queryTypeId];
+
+		return React.createElement(
+			"div",
+			{ style: { marginLeft: 16, marginRight: 16 } },
+			React.createElement(
+				"div",
+				{ className: "panel panel-default" },
+				React.createElement(
+					"div",
+					{ className: "panel-heading", style: { backgroundColor: queryType.searchLabelBkColor, fontSize: "120%" } },
+					queryType.searchLabel
+				),
+				React.createElement(
+					"div",
+					{ className: "panel-body" },
+					this.renderQueryInput()
+				),
+				React.createElement(
+					"div",
+					{ className: "panel-footer" },
+					React.createElement(
+						"div",
+						{ className: "input-group" },
+						React.createElement(
+							"pre",
+							{ className: "adv-query-preview aligncenter input-control input-lg" },
+							this.getCurrentQuery()
+						),
+						React.createElement(
+							"div",
+							{ className: "input-group-btn" },
+							this.renderSearchButtonOrLink()
+						)
+					)
+				)
+			)
+		);
+	},
+	renderUnavailableCorporaMessage: function renderUnavailableCorporaMessage() {
+		if (!this.state.corpora) {
+			return;
+		}
+		var unavailable = [];
+		this.state.corpora.recurse(function (c) {
+			if (c.selected && !c.visible) {
+				unavailable.push(c);
+			}
+			if (c.selected) {
+				// apparently a selected corpus
+			}
+		});
+
+		if (unavailable.length) {
+			return React.createElement(
+				"div",
+				{ id: "unavailable-corpora-message", className: "text-muted" },
+				React.createElement(
+					"div",
+					{ id: "unavailable-corpora-message-message" },
+					React.createElement(
+						"a",
+						{ role: "button", "data-toggle": "dropdown" },
+						unavailable.length,
+						" selected collection",
+						unavailable.length > 1 ? 's are' : ' is',
+						" disabled in this search mode."
+					)
+				),
+				React.createElement(
+					"ul",
+					{ id: "unavailable-corpora-message-list", className: "dropdown-menu" },
+					unavailable.map(function (c) {
+						return React.createElement(
+							"li",
+							{ className: "unavailable-corpora-message-item" },
+							c.name
+						);
+					})
+				)
+			);
+		}
+	},
+
+
 	render: function render() {
+
 		var queryType = queryTypeMap[this.state.queryTypeId];
 		return React.createElement(
@@ -26761,35 +38863,9 @@
 				"div",
 				{ className: "row" },
-				React.createElement(
-					"div",
-					{ className: "aligncenter", style: { marginLeft: 16, marginRight: 16 } },
-					React.createElement(
-						"div",
-						{ className: "input-group" },
-						React.createElement(
-							"span",
-							{ className: "input-group-addon", style: { backgroundColor: queryType.searchLabelBkColor } },
-							queryType.searchLabel
-						),
-						React.createElement(_queryinput2.default, {
-							searchedLanguages: this.state.searchedLanguages || [multipleLanguageCode],
-							queryTypeId: this.state.queryTypeId,
-							query: this.state.query,
-							embedded: this.props.embedded,
-							placeholder: queryType.searchPlaceholder,
-							onChange: this.onADVQuery,
-							onQuery: this.onQuery,
-							onKeyDown: this.handleKey }),
-						React.createElement(
-							"div",
-							{ className: "input-group-btn" },
-							this.renderSearchButtonOrLink()
-						)
-					)
-				)
+				!this.props.embedded && this.state.queryTypeId == "fcs" ? this.renderGQB() : this.renderEmbed()
 			),
 			React.createElement(
 				"div",
-				{ className: "wel", style: { marginTop: 20 } },
+				{ className: "well", style: { marginTop: 20 } },
 				React.createElement(
 					"div",
@@ -26901,5 +38977,10 @@
 						"span",
 						null,
-						"Collections"
+						"Collections ",
+						React.createElement(
+							"small",
+							{ className: "text-muted" },
+							this.props.corpora && this.props.corpora.getSelectedMessage()
+						)
 					) },
 				React.createElement(_corpusview2.default, { corpora: this.state.corpora, languageMap: this.state.languageMap })
@@ -26966,5 +39047,5 @@
 	this.recurse(function (corpus, index) {
 		corpus.visible = true; // visible in the corpus view
-		corpus.selected = true; // selected in the corpus view
+		corpus.selected = false; // not selected in the corpus view, assign later
 		corpus.expanded = false; // not expanded in the corpus view
 		corpus.priority = 1; // used for ordering search results in corpus view
@@ -27043,4 +39124,6 @@
 
 Corpora.prototype.setAggregationContext = function (endpoints2handles) {
+	var _this = this;
+
 	var selectSubTree = function selectSubTree(select, corpus) {
 		corpus.selected = select;
@@ -27052,20 +39135,28 @@
 	this.corpora.forEach(selectSubTree.bind(this, false));
 
+	var handlesNotFound = [];
 	var corporaToSelect = [];
 	_.pairs(endpoints2handles).forEach(function (endp) {
 		var endpoint = endp[0];
 		var handles = endp[1];
-		console.log(endp);
-		console.log(handles);
+		console.log('setAggregationContext: endpoint', endpoint);
+		console.log('setAggregationContext: handles', handles);
 		handles.forEach(function (handle) {
-			this.recurse(function (corpus) {
+			var found = false;
+			_this.recurse(function (corpus) {
 				if (corpus.handle === handle) {
+					found = true;
 					corporaToSelect.push(corpus);
 				}
-			}.bind(this));
-		}.bind(this));
-	}.bind(this));
+			});
+			if (!found) {
+				console.warn("Handle not found in corpora", handle);
+				handlesNotFound.push(handle);
+			}
+		});
+	});
 
 	corporaToSelect.forEach(selectSubTree.bind(this, true));
+	return { 'selected': corporaToSelect, 'unavailable': handlesNotFound };
 };
 
@@ -27075,5 +39166,6 @@
 		if (corpus.visible && corpus.selected) {
 			ids.push(corpus.id);
-			return false; // top-most collection in tree, don't delve deeper
+			//eturn false; // top-most collection in tree, don't delve deeper
+			// But subcollections are also selectable on their own?...
 		}
 		return true;
@@ -27094,37 +39186,7 @@
 };
 
-function Corpora(corpora, updateFn) {
-	var that = this;
-	this.corpora = corpora;
-	this.update = function () {
-		updateFn(that);
-	};
-
-	var sortFn = function sortFn(x, y) {
-		var r = x.institution.name.localeCompare(y.institution.name);
-		if (r !== 0) {
-			return r;
-		}
-		return x.title.toLowerCase().localeCompare(y.title.toLowerCase());
-	};
-
-	this.recurse(function (corpus) {
-		corpus.subCorpora.sort(sortFn);
-	});
-	this.corpora.sort(sortFn);
-
-	this.recurse(function (corpus, index) {
-		corpus.visible = true; // visible in the corpus view
-		corpus.selected = true; // selected in the corpus view
-		corpus.expanded = false; // not expanded in the corpus view
-		corpus.priority = 1; // used for ordering search results in corpus view
-		corpus.index = index; // original order, used for stable sort
-	});
-}
-
 function getQueryVariable(variable) {
 	var query = window.location.search.substring(1);
 	var vars = query.split('&');
-	console.log("vars: ", vars);
 	for (var i = 0; i < vars.length; i++) {
 		var pair = vars[i].split('=');
@@ -27137,31 +39199,30 @@
 }
 
-function Corpora(corpora, updateFn) {
-	var that = this;
-	this.corpora = corpora;
-	this.update = function () {
-		updateFn(that);
-	};
-
-	var sortFn = function sortFn(x, y) {
-		var r = x.institution.name.localeCompare(y.institution.name);
-		if (r !== 0) {
-			return r;
+/* setter opposite of getQueryVariable*/
+function setQueryVariable(qvar, value) {
+	var query = window.location.search.substring(1);
+	var vars = query.split('&');
+	var d = {};
+	d[qvar] = value;
+	var found = false;
+	for (var i = 0; i < vars.length; i++) {
+		var pair = vars[i].split('=');
+		if (decodeURIComponent(pair[0]) === qvar) {
+
+			vars[i] = encodeQueryData(d);
+			found = true;
+			break;
 		}
-		return x.title.toLowerCase().localeCompare(y.title.toLowerCase());
-	};
-
-	this.recurse(function (corpus) {
-		corpus.subCorpora.sort(sortFn);
-	});
-	this.corpora.sort(sortFn);
-
-	this.recurse(function (corpus, index) {
-		corpus.visible = true; // visible in the corpus view
-		corpus.selected = true; // selected in the corpus view
-		corpus.expanded = false; // not expanded in the corpus view
-		corpus.priority = 1; // used for ordering search results in corpus view
-		corpus.index = index; // original order, used for stable sort
-	});
+	}
+
+	if (!found) {
+		// add to end of url
+		vars.push(encodeQueryData(d));
+	}
+
+	var searchPart = vars.join('&');
+	var newUrl = window.location.origin + window.location.pathname + '?' + searchPart;
+	console.log("set url", newUrl);
+	window.history.replaceState(window.history.state, null, newUrl);
 }
 
@@ -27197,5 +39258,5 @@
 module.exports = AggregatorPage;
 
-},{"../components/corpusview.jsx":45,"../components/languageselector.jsx":50,"../components/modal.jsx":51,"../components/queryinput.jsx":53,"../components/results.jsx":55,"../components/zoomedresult.jsx":57,"classnames":1,"create-react-class":3,"prop-types":30}],61:[function(require,module,exports){
+},{"../components/corpusview.jsx":50,"../components/languageselector.jsx":55,"../components/modal.jsx":56,"../components/queryinput.jsx":58,"../components/results.jsx":60,"../components/zoomedresult.jsx":62,"classnames":1,"create-react-class":6,"prop-types":33}],66:[function(require,module,exports){
 "use strict";
 
@@ -27300,5 +39361,5 @@
 module.exports = HelpPage;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30}],62:[function(require,module,exports){
+},{"classnames":1,"create-react-class":6,"prop-types":33}],67:[function(require,module,exports){
 "use strict";
 
@@ -27669,3 +39730,3 @@
 module.exports = StatisticsPage;
 
-},{"classnames":1,"create-react-class":3,"prop-types":30}]},{},[58]);
+},{"classnames":1,"create-react-class":6,"prop-types":33}]},{},[63]);
Index: SRUAggregator/trunk/src/main/resources/assets/js/main.jsx
===================================================================
--- SRUAggregator/trunk/src/main/resources/assets/js/main.jsx	(revision 7222)
+++ SRUAggregator/trunk/src/main/resources/assets/js/main.jsx	(revision 7223)
@@ -14,9 +14,9 @@
 window.MyAggregator = window.MyAggregator || {};
 
-var VERSION = window.MyAggregator.VERSION = "v.2.9.91-57";
+var VERSION = window.MyAggregator.VERSION = "v.3.0.0-64";
 
 var URLROOT = window.MyAggregator.URLROOT =
-	//window.location.pathname.substring(0, window.location.pathname.indexOf("/",2)) ||
-window.location.pathname ||
+	window.location.pathname.substring(0, window.location.pathname.indexOf("/", 2)) ||
+        //window.location.pathname ||
 	"/Aggregator";
 
