1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.preferences.display;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.awt.Component;
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7 | import java.util.ArrayList;
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8 | import java.util.Arrays;
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9 | import java.util.List;
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10 | import java.util.Locale;
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11 |
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12 | import javax.swing.Box;
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13 | import javax.swing.DefaultComboBoxModel;
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14 | import javax.swing.DefaultListCellRenderer;
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15 | import javax.swing.JLabel;
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16 | import javax.swing.JList;
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17 | import javax.swing.JPanel;
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18 | import javax.swing.ListCellRenderer;
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19 |
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20 | import org.openstreetmap.josm.Main;
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21 | import org.openstreetmap.josm.gui.preferences.PreferenceSetting;
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22 | import org.openstreetmap.josm.gui.preferences.PreferenceSettingFactory;
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23 | import org.openstreetmap.josm.gui.preferences.PreferenceTabbedPane;
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24 | import org.openstreetmap.josm.gui.preferences.SubPreferenceSetting;
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25 | import org.openstreetmap.josm.gui.preferences.TabPreferenceSetting;
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26 | import org.openstreetmap.josm.gui.widgets.JosmComboBox;
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27 | import org.openstreetmap.josm.tools.GBC;
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28 | import org.openstreetmap.josm.tools.I18n;
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29 | import org.openstreetmap.josm.tools.LanguageInfo;
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30 |
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31 | /**
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32 | * Language preferences.
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33 | * @since 1065
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34 | */
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35 | public class LanguagePreference implements SubPreferenceSetting {
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36 |
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37 | private static final String LANGUAGE = "language";
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38 |
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39 | /**
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40 | * Factory used to create a new {@code LanguagePreference}.
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41 | */
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42 | public static class Factory implements PreferenceSettingFactory {
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43 | @Override
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44 | public PreferenceSetting createPreferenceSetting() {
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45 | return new LanguagePreference();
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46 | }
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47 | }
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48 |
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49 | /** the combo box with the available locales */
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50 | private JosmComboBox<Locale> langCombo;
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51 |
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52 | @Override
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53 | public void addGui(final PreferenceTabbedPane gui) {
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54 | LanguageComboBoxModel model = new LanguageComboBoxModel();
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55 | // Selecting the language BEFORE the JComboBox listens to model changes speed up initialization by ~35ms (see #7386)
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56 | // See https://stackoverflow.com/questions/3194958/fast-replacement-for-jcombobox-basiccomboboxui
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57 | model.selectLanguage(Main.pref.get(LANGUAGE));
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58 | langCombo = new JosmComboBox<>(model);
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59 | langCombo.setRenderer(new LanguageCellRenderer());
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60 |
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61 | LafPreference lafPreference = gui.getSetting(LafPreference.class);
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62 | final JPanel panel = lafPreference.panel;
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63 | panel.add(new JLabel(tr("Language")), GBC.std().insets(20, 0, 0, 0));
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64 | panel.add(GBC.glue(5, 0), GBC.std().fill(GBC.HORIZONTAL));
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65 | panel.add(langCombo, GBC.eol().fill(GBC.HORIZONTAL));
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66 | panel.add(Box.createVerticalGlue(), GBC.eol().fill(GBC.BOTH));
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67 |
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68 | TabPreferenceSetting tabPref = lafPreference.getTabPreferenceSetting(gui);
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69 | tabPref.registerSubTab(this, tabPref.getSubTab(lafPreference));
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70 | }
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71 |
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72 | @Override
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73 | public boolean ok() {
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74 | if (langCombo.getSelectedItem() == null)
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75 | return Main.pref.put(LANGUAGE, null);
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76 | else
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77 | return Main.pref.put(LANGUAGE,
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78 | LanguageInfo.getJOSMLocaleCode((Locale) langCombo.getSelectedItem()));
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79 | }
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80 |
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81 | private static class LanguageComboBoxModel extends DefaultComboBoxModel<Locale> {
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82 | private final List<Locale> data = new ArrayList<>();
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83 |
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84 | LanguageComboBoxModel() {
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85 | data.add(0, null);
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86 | data.addAll(Arrays.asList(I18n.getAvailableTranslations()));
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87 | }
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88 |
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89 | private void selectLanguage(String language) {
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90 | setSelectedItem(null);
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91 | if (language != null) {
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92 | String lang = LanguageInfo.getJavaLocaleCode(language);
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93 | for (Locale locale: data) {
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94 | if (locale == null) {
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95 | continue;
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96 | }
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97 | if (locale.toString().equals(lang)) {
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98 | setSelectedItem(locale);
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99 | return;
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100 | }
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101 | }
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102 | }
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103 | }
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104 |
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105 | @Override
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106 | public Locale getElementAt(int index) {
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107 | return data.get(index);
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108 | }
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109 |
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110 | @Override
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111 | public int getSize() {
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112 | return data.size();
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113 | }
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114 | }
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115 |
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116 | private static class LanguageCellRenderer implements ListCellRenderer<Locale> {
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117 | private final DefaultListCellRenderer dispatch;
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118 |
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119 | /**
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120 | * Constructs a new {@code LanguageCellRenderer}.
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121 | */
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122 | LanguageCellRenderer() {
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123 | this.dispatch = new DefaultListCellRenderer();
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124 | }
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125 |
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126 | @Override
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127 | public Component getListCellRendererComponent(JList<? extends Locale> list, Locale l,
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128 | int index, boolean isSelected, boolean cellHasFocus) {
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129 | return dispatch.getListCellRendererComponent(list,
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130 | l == null
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131 | ? tr("Default (Auto determined)")
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132 | : LanguageInfo.getDisplayName(l),
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133 | index, isSelected, cellHasFocus);
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134 | }
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135 | }
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136 |
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137 | @Override
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138 | public boolean isExpert() {
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139 | return false;
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140 | }
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141 |
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142 | @Override
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143 | public TabPreferenceSetting getTabPreferenceSetting(final PreferenceTabbedPane gui) {
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144 | return gui.getSetting(LafPreference.class).getTabPreferenceSetting(gui);
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145 | }
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146 | }
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