1 | /* |
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2 | * Copyright (C) 2015 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.components; |
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18 | |
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19 | import eu.clarin.cmdi.vlo.FacetConstants; |
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20 | import eu.clarin.cmdi.vlo.config.VloConfig; |
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21 | import java.util.regex.Matcher; |
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22 | import java.util.regex.Pattern; |
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23 | import org.apache.wicket.AttributeModifier; |
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24 | import org.apache.wicket.MarkupContainer; |
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25 | import org.apache.wicket.markup.html.WebMarkupContainer; |
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26 | import org.apache.wicket.markup.html.panel.GenericPanel; |
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27 | import org.apache.wicket.model.AbstractReadOnlyModel; |
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28 | import org.apache.wicket.model.IModel; |
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29 | import org.apache.wicket.spring.injection.annot.SpringBean; |
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30 | |
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31 | /** |
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32 | * A panel that has a link and a label for displaying language names with a link |
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33 | * to the language information page. If the value model object matches the |
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34 | * 'language code' syntax ("<code>code:xxx</code>"), it will show a link to the |
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35 | * configured language information page, wrapping around a |
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36 | * {@link FieldValueLabel} to show the language name. In other cases, it falls |
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37 | * back to a plain FieldValueLabel without a link. |
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38 | * |
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39 | * @author Twan Goosen <twan.goosen@mpi.nl> |
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40 | * @see FacetConstants#FIELD_LANGUAGE_CODE |
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41 | * @see VloConfig#getLanguageLinkPrefix() |
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42 | */ |
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43 | public class LanguageInfoLink extends GenericPanel<String> { |
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44 | |
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45 | @SpringBean |
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46 | private VloConfig vloConfig; |
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47 | |
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48 | private final static Pattern LANGUAGE_CODE_REGEX = Pattern.compile("code:(.*)"); |
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49 | private final MarkupContainer link; |
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50 | private final FieldValueLabel fallbackLabel; |
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51 | |
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52 | public LanguageInfoLink(String id, IModel<String> originalValueModel, IModel<String> facetNameModel) { |
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53 | super(id, originalValueModel); |
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54 | |
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55 | // link to language info page |
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56 | link = new WebMarkupContainer("link"); |
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57 | // make it an external link to the language info page |
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58 | link.add(new AttributeModifier("href", new AbstractReadOnlyModel<String>() { |
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59 | |
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60 | @Override |
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61 | public String getObject() { |
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62 | final String languageCode = getLanguageCode(); |
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63 | if (languageCode == null) { |
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64 | return null; |
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65 | } else { |
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66 | return vloConfig.getLanguageLinkPrefix() + languageCode; |
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67 | } |
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68 | } |
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69 | })); |
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70 | |
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71 | // normal field value label inside (which should convert the language code to a name) |
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72 | link.add(new FieldValueLabel("label", originalValueModel, facetNameModel)); |
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73 | add(link); |
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74 | |
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75 | // add a standalone label to be shown when the link is not available |
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76 | fallbackLabel = new FieldValueLabel("label", originalValueModel, facetNameModel); |
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77 | add(fallbackLabel); |
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78 | } |
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79 | |
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80 | @Override |
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81 | protected void onConfigure() { |
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82 | // when a link can be generated (i.e. wehen a language code is |
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83 | // available) show the link; otherwise show the fallback label |
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84 | final boolean linkAvailable = newLanguageCodeMatcher().matches(); |
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85 | link.setVisible(linkAvailable); |
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86 | fallbackLabel.setVisible(!linkAvailable); |
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87 | } |
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88 | |
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89 | private String getLanguageCode() { |
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90 | final Matcher matcher = newLanguageCodeMatcher(); |
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91 | if (matcher.matches() && matcher.groupCount() == 1) { |
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92 | return matcher.group(1); |
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93 | } else { |
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94 | return null; |
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95 | } |
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96 | } |
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97 | |
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98 | private Matcher newLanguageCodeMatcher() { |
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99 | return LANGUAGE_CODE_REGEX.matcher(getModelObject()); |
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100 | } |
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101 | } |
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