1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.preferences.projection;
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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.Dimension;
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7 | import java.awt.GridBagLayout;
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8 | import java.awt.event.ActionListener;
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9 | import java.util.ArrayList;
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10 | import java.util.Collection;
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11 | import java.util.Collections;
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12 | import java.util.Comparator;
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13 | import java.util.List;
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14 | import java.util.regex.Matcher;
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15 | import java.util.regex.Pattern;
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16 |
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17 | import javax.swing.AbstractListModel;
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18 | import javax.swing.JList;
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19 | import javax.swing.JPanel;
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20 | import javax.swing.JScrollPane;
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21 | import javax.swing.event.DocumentEvent;
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22 | import javax.swing.event.DocumentListener;
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23 | import javax.swing.event.ListSelectionEvent;
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24 | import javax.swing.event.ListSelectionListener;
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25 |
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26 | import org.openstreetmap.josm.data.projection.Projection;
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27 | import org.openstreetmap.josm.data.projection.Projections;
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28 | import org.openstreetmap.josm.gui.widgets.JosmTextField;
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29 | import org.openstreetmap.josm.tools.GBC;
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30 |
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31 | /**
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32 | * Projection choice that lists all known projects by code.
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33 | */
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34 | public class CodeProjectionChoice extends AbstractProjectionChoice implements SubPrefsOptions {
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35 |
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36 | String code;
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37 |
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38 | /**
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39 | * Constructs a new {@code CodeProjectionChoice}.
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40 | */
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41 | public CodeProjectionChoice() {
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42 | super(tr("By Code (EPSG)"), /* NO-ICON */ "core:code");
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43 | }
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44 |
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45 | private static class CodeSelectionPanel extends JPanel implements ListSelectionListener, DocumentListener {
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46 |
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47 | public JosmTextField filter;
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48 | private ProjectionCodeListModel model;
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49 | public JList<String> selectionList;
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50 | List<String> data;
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51 | List<String> filteredData;
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52 | static final String DEFAULT_CODE = "EPSG:3857";
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53 | String lastCode = DEFAULT_CODE;
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54 | ActionListener listener;
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55 |
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56 | public CodeSelectionPanel(String initialCode, ActionListener listener) {
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57 | this.listener = listener;
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58 | data = new ArrayList<>(Projections.getAllProjectionCodes());
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59 | Collections.sort(data, new CodeComparator());
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60 | filteredData = new ArrayList<>(data);
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61 | build();
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62 | setCode(initialCode != null ? initialCode : DEFAULT_CODE);
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63 | selectionList.addListSelectionListener(this);
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64 | }
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65 |
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66 | /**
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67 | * Comparator that compares the number part of the code numerically.
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68 | */
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69 | private static class CodeComparator implements Comparator<String> {
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70 | final Pattern codePattern = Pattern.compile("([a-zA-Z]+):(\\d+)");
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71 | @Override
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72 | public int compare(String c1, String c2) {
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73 | Matcher matcher1 = codePattern.matcher(c1);
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74 | Matcher matcher2 = codePattern.matcher(c2);
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75 | if (matcher1.matches()) {
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76 | if (matcher2.matches()) {
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77 | int cmp1 = matcher1.group(1).compareTo(matcher2.group(1));
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78 | if (cmp1 != 0) return cmp1;
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79 | int num1 = Integer.parseInt(matcher1.group(2));
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80 | int num2 = Integer.parseInt(matcher2.group(2));
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81 | return Integer.valueOf(num1).compareTo(num2);
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82 | } else
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83 | return -1;
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84 | } else if (matcher2.matches())
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85 | return 1;
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86 | return c1.compareTo(c2);
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87 | }
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88 | }
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89 |
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90 | /**
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91 | * List model for the filtered view on the list of all codes.
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92 | */
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93 | private class ProjectionCodeListModel extends AbstractListModel<String> {
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94 | @Override
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95 | public int getSize() {
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96 | return filteredData.size();
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97 | }
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98 |
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99 | @Override
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100 | public String getElementAt(int index) {
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101 | if (index >= 0 && index < filteredData.size())
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102 | return filteredData.get(index);
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103 | else
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104 | return null;
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105 | }
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106 |
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107 | public void fireContentsChanged() {
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108 | fireContentsChanged(this, 0, this.getSize()-1);
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109 | }
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110 | }
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111 |
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112 | private void build() {
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113 | filter = new JosmTextField(30);
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114 | filter.setColumns(10);
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115 | filter.getDocument().addDocumentListener(this);
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116 |
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117 | selectionList = new JList<>(data.toArray(new String[0]));
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118 | selectionList.setModel(model = new ProjectionCodeListModel());
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119 | JScrollPane scroll = new JScrollPane(selectionList);
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120 | scroll.setPreferredSize(new Dimension(200, 214));
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121 |
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122 | this.setLayout(new GridBagLayout());
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123 | this.add(filter, GBC.eol().weight(1.0, 0.0));
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124 | this.add(scroll, GBC.eol());
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125 | }
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126 |
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127 | public String getCode() {
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128 | int idx = selectionList.getSelectedIndex();
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129 | if (idx == -1) return lastCode;
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130 | return filteredData.get(selectionList.getSelectedIndex());
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131 | }
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132 |
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133 | public final void setCode(String code) {
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134 | int idx = filteredData.indexOf(code);
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135 | if (idx != -1) {
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136 | selectionList.setSelectedIndex(idx);
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137 | selectionList.ensureIndexIsVisible(idx);
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138 | }
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139 | }
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140 |
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141 | @Override
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142 | public void valueChanged(ListSelectionEvent e) {
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143 | listener.actionPerformed(null);
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144 | lastCode = getCode();
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145 | }
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146 |
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147 | @Override
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148 | public void insertUpdate(DocumentEvent e) {
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149 | updateFilter();
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150 | }
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151 |
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152 | @Override
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153 | public void removeUpdate(DocumentEvent e) {
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154 | updateFilter();
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155 | }
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156 |
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157 | @Override
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158 | public void changedUpdate(DocumentEvent e) {
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159 | updateFilter();
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160 | }
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161 |
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162 | private void updateFilter() {
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163 | filteredData.clear();
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164 | String filterTxt = filter.getText().trim().toLowerCase();
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165 | for (String code : data) {
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166 | if (code.toLowerCase().contains(filterTxt)) {
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167 | filteredData.add(code);
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168 | }
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169 | }
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170 | model.fireContentsChanged();
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171 | int idx = filteredData.indexOf(lastCode);
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172 | if (idx == -1) {
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173 | selectionList.clearSelection();
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174 | if (selectionList.getModel().getSize() > 0) {
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175 | selectionList.ensureIndexIsVisible(0);
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176 | }
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177 | } else {
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178 | selectionList.setSelectedIndex(idx);
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179 | selectionList.ensureIndexIsVisible(idx);
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180 | }
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181 | }
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182 | }
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183 |
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184 | @Override
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185 | public Projection getProjection() {
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186 | return Projections.getProjectionByCode(code);
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187 | }
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188 |
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189 |
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190 | @Override
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191 | public String getCurrentCode() {
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192 | // not needed - getProjection() is overridden
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193 | throw new UnsupportedOperationException();
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194 | }
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195 |
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196 | @Override
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197 | public String getProjectionName() {
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198 | // not needed - getProjection() is overridden
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199 | throw new UnsupportedOperationException();
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200 | }
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201 |
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202 | @Override
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203 | public void setPreferences(Collection<String> args) {
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204 | if (args != null && !args.isEmpty()) {
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205 | code = args.iterator().next();
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206 | }
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207 | }
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208 |
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209 | @Override
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210 | public JPanel getPreferencePanel(ActionListener listener) {
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211 | return new CodeSelectionPanel(code, listener);
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212 | }
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213 |
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214 | @Override
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215 | public Collection<String> getPreferences(JPanel panel) {
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216 | if (!(panel instanceof CodeSelectionPanel)) {
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217 | throw new IllegalArgumentException("Unsupported panel: "+panel);
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218 | }
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219 | CodeSelectionPanel csPanel = (CodeSelectionPanel) panel;
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220 | return Collections.singleton(csPanel.getCode());
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221 | }
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222 |
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223 | /* don't return all possible codes - this projection choice it too generic */
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224 | @Override
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225 | public String[] allCodes() {
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226 | return new String[0];
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227 | }
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228 |
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229 | /* not needed since allCodes() returns empty array */
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230 | @Override
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231 | public Collection<String> getPreferencesFromCode(String code) {
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232 | return null;
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233 | }
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234 |
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235 | @Override
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236 | public boolean showProjectionCode() {
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237 | return true;
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238 | }
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239 |
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240 | @Override
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241 | public boolean showProjectionName() {
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242 | return true;
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243 | }
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244 |
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245 | }
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