1 | /* |
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2 | * Copyright (C) 2014 CLARIN |
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3 | * |
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4 | * This program is free software: you can redistribute it and/or modify |
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5 | * it under the terms of the GNU General Public License as published by |
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6 | * the Free Software Foundation, either version 3 of the License, or |
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7 | * (at your option) any later version. |
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8 | * |
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9 | * This program is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | * GNU General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU General Public License |
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15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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16 | */ |
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17 | package eu.clarin.cmdi.vlo.wicket.panels.search; |
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18 | |
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19 | import eu.clarin.cmdi.vlo.pojo.QueryFacetsSelection; |
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20 | import eu.clarin.cmdi.vlo.wicket.model.SearchContextModel; |
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21 | import eu.clarin.cmdi.vlo.wicket.model.SearchResultExpansionStateModel; |
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22 | import eu.clarin.cmdi.vlo.wicket.provider.SolrDocumentProvider; |
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23 | import java.util.Arrays; |
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24 | import java.util.HashSet; |
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25 | import java.util.List; |
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26 | import java.util.Set; |
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27 | import org.apache.solr.common.SolrDocument; |
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28 | import org.apache.wicket.ajax.AjaxRequestTarget; |
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29 | import org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior; |
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30 | import org.apache.wicket.ajax.markup.html.navigation.paging.AjaxPagingNavigator; |
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31 | import org.apache.wicket.markup.html.basic.Label; |
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32 | import org.apache.wicket.markup.html.form.DropDownChoice; |
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33 | import org.apache.wicket.markup.html.form.Form; |
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34 | import org.apache.wicket.markup.html.navigation.paging.IPageableItems; |
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35 | import org.apache.wicket.markup.html.panel.Panel; |
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36 | import org.apache.wicket.markup.repeater.Item; |
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37 | import org.apache.wicket.markup.repeater.data.DataView; |
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38 | import org.apache.wicket.markup.repeater.data.IDataProvider; |
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39 | import org.apache.wicket.model.AbstractReadOnlyModel; |
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40 | import org.apache.wicket.model.IModel; |
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41 | import org.apache.wicket.model.Model; |
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42 | import org.apache.wicket.model.PropertyModel; |
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43 | |
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44 | /** |
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45 | * Panel that has a data view on the current search results |
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46 | * |
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47 | * @author twagoo |
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48 | */ |
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49 | public class SearchResultsPanel extends Panel { |
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50 | |
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51 | public static final List<Long> ITEMS_PER_PAGE_OPTIONS = Arrays.asList(5L, 10L, 25L, 50L, 100L); |
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52 | |
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53 | private final IDataProvider<SolrDocument> solrDocumentProvider; |
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54 | private final DataView<SolrDocument> resultsView; |
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55 | private final IModel<Set<Object>> expansionsModel; |
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56 | |
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57 | public SearchResultsPanel(String id, final IModel<QueryFacetsSelection> selectionModel) { |
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58 | super(id, selectionModel); |
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59 | add(new Label("title", new SearchResultsTitleModel(selectionModel))); |
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60 | |
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61 | solrDocumentProvider = new SolrDocumentProvider(selectionModel); |
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62 | |
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63 | expansionsModel = new Model(new HashSet<Object>()); |
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64 | // data view for search results |
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65 | resultsView = new DataView<SolrDocument>("resultItem", solrDocumentProvider, 10) { |
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66 | |
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67 | @Override |
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68 | protected void populateItem(Item<SolrDocument> item) { |
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69 | final long index = (getCurrentPage() * getItemsPerPage()) + item.getIndex(); |
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70 | final long size = internalGetDataProvider().size(); |
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71 | final SearchContextModel contextModel = new SearchContextModel(index, size, selectionModel); |
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72 | // single result item |
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73 | item.add(new SearchResultItemPanel("resultItemDetails", item.getModel(), contextModel, |
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74 | new SearchResultExpansionStateModel(expansionsModel, item.getModel()) |
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75 | )); |
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76 | } |
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77 | }; |
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78 | add(resultsView); |
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79 | |
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80 | // pagination navigators |
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81 | add(new AjaxPagingNavigator("pagingTop", resultsView)); |
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82 | add(new AjaxPagingNavigator("pagingBottom", resultsView)); |
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83 | |
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84 | // total result counter |
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85 | add(createResultCount("resultCount")); |
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86 | |
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87 | // page result indicater |
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88 | add(createResultPageIndicator("resultPageIndicator", resultsView)); |
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89 | |
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90 | // form to select number of results per page |
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91 | add(createResultPageSizeForm("resultPageSizeForm", resultsView)); |
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92 | |
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93 | //For Ajax updating of search results |
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94 | setOutputMarkupId(true); |
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95 | } |
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96 | |
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97 | public void resetExpansion() { |
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98 | expansionsModel.getObject().clear(); |
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99 | } |
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100 | |
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101 | /** |
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102 | * Gets called on each request before render |
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103 | */ |
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104 | @Override |
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105 | protected void onConfigure() { |
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106 | super.onConfigure(); |
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107 | |
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108 | // only show pagination navigators if there's more than one page |
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109 | final boolean showPaging = resultsView.getPageCount() > 1; |
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110 | this.get("pagingTop").setVisible(showPaging); |
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111 | this.get("pagingBottom").setVisible(showPaging); |
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112 | } |
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113 | |
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114 | private Label createResultCount(String id) { |
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115 | final IModel<String> resultCountModel = new AbstractReadOnlyModel<String>() { |
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116 | |
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117 | @Override |
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118 | public String getObject() { |
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119 | return String.format("%d results", solrDocumentProvider.size()); |
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120 | } |
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121 | }; |
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122 | return new Label(id, resultCountModel); |
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123 | } |
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124 | |
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125 | private Label createResultPageIndicator(String id, final IPageableItems resultsView) { |
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126 | IModel<String> indicatorModel = new AbstractReadOnlyModel<String>() { |
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127 | |
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128 | @Override |
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129 | public String getObject() { |
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130 | final long firstShown = 1 + resultsView.getCurrentPage() * resultsView.getItemsPerPage(); |
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131 | final long lastShown = Math.min(resultsView.getItemCount(), firstShown + resultsView.getItemsPerPage() - 1); |
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132 | return String.format("Showing %d to %d", firstShown, lastShown); |
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133 | } |
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134 | }; |
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135 | return new Label(id, indicatorModel) { |
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136 | |
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137 | @Override |
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138 | protected void onConfigure() { |
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139 | // hide if no results |
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140 | setVisible(resultsView.getItemCount() > 0); |
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141 | } |
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142 | |
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143 | }; |
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144 | } |
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145 | |
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146 | private Form createResultPageSizeForm(String id, final IPageableItems resultsView) { |
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147 | final Form resultPageSizeForm = new Form(id); |
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148 | |
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149 | final DropDownChoice<Long> pageSizeDropDown |
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150 | = new DropDownChoice<Long>("resultPageSize", |
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151 | // bind to items per page property of pageable |
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152 | new PropertyModel<Long>(resultsView, "itemsPerPage"), |
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153 | ITEMS_PER_PAGE_OPTIONS); |
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154 | pageSizeDropDown.add(new AjaxFormComponentUpdatingBehavior("onchange") { |
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155 | |
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156 | @Override |
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157 | protected void onUpdate(AjaxRequestTarget target) { |
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158 | target.add(SearchResultsPanel.this); |
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159 | } |
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160 | }); |
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161 | resultPageSizeForm.add(pageSizeDropDown); |
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162 | |
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163 | return resultPageSizeForm; |
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164 | } |
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165 | |
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166 | private static class SearchResultsTitleModel extends AbstractReadOnlyModel<String> { |
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167 | |
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168 | private final IModel<QueryFacetsSelection> selectionModel; |
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169 | |
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170 | public SearchResultsTitleModel(IModel<QueryFacetsSelection> selectionModel) { |
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171 | this.selectionModel = selectionModel; |
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172 | } |
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173 | |
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174 | @Override |
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175 | public String getObject() { |
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176 | final QueryFacetsSelection selection = selectionModel.getObject(); |
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177 | if ((selection.getQuery() == null || selection.getQuery().isEmpty()) |
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178 | && (selection.getSelection() == null || selection.getSelection().isEmpty())) { |
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179 | return "All records"; |
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180 | } else { |
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181 | return "Search results"; |
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182 | } |
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183 | } |
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184 | } |
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185 | |
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186 | } |
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