1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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2 | package org.openstreetmap.josm.actions;
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3 |
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4 | import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
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5 | import static org.openstreetmap.josm.tools.I18n.tr;
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6 |
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7 | import java.awt.event.ActionEvent;
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8 | import java.awt.event.KeyEvent;
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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.HashMap;
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13 | import java.util.HashSet;
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14 | import java.util.LinkedHashMap;
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15 | import java.util.LinkedHashSet;
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16 | import java.util.LinkedList;
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17 | import java.util.List;
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18 | import java.util.Set;
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19 | import java.util.Stack;
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20 |
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21 | import javax.swing.JOptionPane;
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22 |
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23 | import org.openstreetmap.josm.Main;
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24 | import org.openstreetmap.josm.command.ChangeCommand;
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25 | import org.openstreetmap.josm.command.Command;
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26 | import org.openstreetmap.josm.command.DeleteCommand;
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27 | import org.openstreetmap.josm.command.SequenceCommand;
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28 | import org.openstreetmap.josm.corrector.ReverseWayTagCorrector;
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29 | import org.openstreetmap.josm.corrector.UserCancelException;
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30 | import org.openstreetmap.josm.data.osm.Node;
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31 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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32 | import org.openstreetmap.josm.data.osm.TagCollection;
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33 | import org.openstreetmap.josm.data.osm.Way;
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34 | import org.openstreetmap.josm.data.preferences.BooleanProperty;
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35 | import org.openstreetmap.josm.gui.ExtendedDialog;
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36 | import org.openstreetmap.josm.gui.conflict.tags.CombinePrimitiveResolverDialog;
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37 | import org.openstreetmap.josm.gui.util.GuiHelper;
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38 | import org.openstreetmap.josm.tools.Pair;
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39 | import org.openstreetmap.josm.tools.Shortcut;
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40 |
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41 | /**
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42 | * Combines multiple ways into one.
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43 | *
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44 | */
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45 | public class CombineWayAction extends JosmAction {
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46 |
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47 | private static final BooleanProperty PROP_REVERSE_WAY = new BooleanProperty("tag-correction.reverse-way", true);
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48 |
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49 | public CombineWayAction() {
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50 | super(tr("Combine Way"), "combineway", tr("Combine several ways into one."),
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51 | Shortcut.registerShortcut("tools:combineway", tr("Tool: {0}", tr("Combine Way")), KeyEvent.VK_C, Shortcut.DIRECT), true);
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52 | putValue("help", ht("/Action/CombineWay"));
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53 | }
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54 |
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55 | protected static boolean confirmChangeDirectionOfWays() {
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56 | ExtendedDialog ed = new ExtendedDialog(Main.parent,
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57 | tr("Change directions?"),
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58 | new String[] {tr("Reverse and Combine"), tr("Cancel")});
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59 | ed.setButtonIcons(new String[] {"wayflip.png", "cancel.png"});
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60 | ed.setContent(tr("The ways can not be combined in their current directions. "
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61 | + "Do you want to reverse some of them?"));
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62 | ed.showDialog();
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63 | return ed.getValue() == 1;
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64 | }
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65 |
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66 | protected static void warnCombiningImpossible() {
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67 | String msg = tr("Could not combine ways "
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68 | + "(They could not be merged into a single string of nodes)");
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69 | JOptionPane.showMessageDialog(
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70 | Main.parent,
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71 | msg,
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72 | tr("Information"),
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73 | JOptionPane.INFORMATION_MESSAGE
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74 | );
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75 | return;
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76 | }
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77 |
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78 | protected static Way getTargetWay(Collection<Way> combinedWays) {
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79 | // init with an arbitrary way
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80 | Way targetWay = combinedWays.iterator().next();
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81 |
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82 | // look for the first way already existing on
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83 | // the server
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84 | for (Way w : combinedWays) {
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85 | targetWay = w;
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86 | if (!w.isNew()) {
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87 | break;
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88 | }
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89 | }
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90 | return targetWay;
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91 | }
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92 |
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93 | /**
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94 | * @param ways
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95 | * @return null if ways cannot be combined. Otherwise returns the combined
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96 | * ways and the commands to combine
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97 | * @throws UserCancelException
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98 | */
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99 | public static Pair<Way, Command> combineWaysWorker(Collection<Way> ways) throws UserCancelException {
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100 |
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101 | // prepare and clean the list of ways to combine
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102 | //
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103 | if (ways == null || ways.isEmpty())
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104 | return null;
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105 | ways.remove(null); // just in case - remove all null ways from the collection
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106 |
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107 | // remove duplicates, preserving order
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108 | ways = new LinkedHashSet<Way>(ways);
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109 |
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110 | // try to build a new way which includes all the combined
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111 | // ways
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112 | //
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113 | NodeGraph graph = NodeGraph.createUndirectedGraphFromNodeWays(ways);
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114 | List<Node> path = graph.buildSpanningPath();
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115 | if (path == null) {
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116 | warnCombiningImpossible();
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117 | return null;
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118 | }
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119 | // check whether any ways have been reversed in the process
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120 | // and build the collection of tags used by the ways to combine
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121 | //
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122 | TagCollection wayTags = TagCollection.unionOfAllPrimitives(ways);
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123 |
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124 | List<Way> reversedWays = new LinkedList<Way>();
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125 | List<Way> unreversedWays = new LinkedList<Way>();
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126 | for (Way w: ways) {
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127 | if ((path.indexOf(w.getNode(0)) + 1) == path.lastIndexOf(w.getNode(1))) {
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128 | unreversedWays.add(w);
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129 | } else {
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130 | reversedWays.add(w);
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131 | }
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132 | }
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133 | // reverse path if all ways have been reversed
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134 | if (unreversedWays.isEmpty()) {
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135 | Collections.reverse(path);
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136 | unreversedWays = reversedWays;
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137 | reversedWays = null;
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138 | }
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139 | if ((reversedWays != null) && !reversedWays.isEmpty()) {
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140 | if (!confirmChangeDirectionOfWays()) return null;
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141 | // filter out ways that have no direction-dependent tags
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142 | unreversedWays = ReverseWayTagCorrector.irreversibleWays(unreversedWays);
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143 | reversedWays = ReverseWayTagCorrector.irreversibleWays(reversedWays);
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144 | // reverse path if there are more reversed than unreversed ways with direction-dependent tags
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145 | if (reversedWays.size() > unreversedWays.size()) {
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146 | Collections.reverse(path);
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147 | List<Way> tempWays = unreversedWays;
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148 | unreversedWays = reversedWays;
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149 | reversedWays = tempWays;
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150 | }
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151 | // if there are still reversed ways with direction-dependent tags, reverse their tags
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152 | if (!reversedWays.isEmpty() && PROP_REVERSE_WAY.get()) {
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153 | List<Way> unreversedTagWays = new ArrayList<Way>(ways);
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154 | unreversedTagWays.removeAll(reversedWays);
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155 | ReverseWayTagCorrector reverseWayTagCorrector = new ReverseWayTagCorrector();
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156 | List<Way> reversedTagWays = new ArrayList<Way>();
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157 | Collection<Command> changePropertyCommands = null;
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158 | for (Way w : reversedWays) {
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159 | Way wnew = new Way(w);
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160 | reversedTagWays.add(wnew);
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161 | changePropertyCommands = reverseWayTagCorrector.execute(w, wnew);
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162 | }
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163 | if ((changePropertyCommands != null) && !changePropertyCommands.isEmpty()) {
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164 | for (Command c : changePropertyCommands) {
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165 | c.executeCommand();
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166 | }
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167 | }
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168 | wayTags = TagCollection.unionOfAllPrimitives(reversedTagWays);
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169 | wayTags.add(TagCollection.unionOfAllPrimitives(unreversedTagWays));
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170 | }
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171 | }
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172 |
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173 | // create the new way and apply the new node list
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174 | //
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175 | Way targetWay = getTargetWay(ways);
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176 | Way modifiedTargetWay = new Way(targetWay);
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177 | modifiedTargetWay.setNodes(path);
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178 |
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179 | List<Command> resolution = CombinePrimitiveResolverDialog.launchIfNecessary(wayTags, ways, Collections.singleton(targetWay));
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180 |
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181 | LinkedList<Command> cmds = new LinkedList<Command>();
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182 | LinkedList<Way> deletedWays = new LinkedList<Way>(ways);
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183 | deletedWays.remove(targetWay);
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184 |
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185 | cmds.add(new ChangeCommand(targetWay, modifiedTargetWay));
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186 | cmds.addAll(resolution);
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187 | cmds.add(new DeleteCommand(deletedWays));
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188 | final SequenceCommand sequenceCommand = new SequenceCommand(tr("Combine {0} ways", ways.size()), cmds);
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189 |
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190 | return new Pair<Way, Command>(targetWay, sequenceCommand);
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191 | }
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192 |
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193 | public void actionPerformed(ActionEvent event) {
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194 | if (getCurrentDataSet() == null)
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195 | return;
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196 | Collection<OsmPrimitive> selection = getCurrentDataSet().getSelected();
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197 | Set<Way> selectedWays = OsmPrimitive.getFilteredSet(selection, Way.class);
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198 | if (selectedWays.size() < 2) {
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199 | JOptionPane.showMessageDialog(
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200 | Main.parent,
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201 | tr("Please select at least two ways to combine."),
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202 | tr("Information"),
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203 | JOptionPane.INFORMATION_MESSAGE
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204 | );
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205 | return;
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206 | }
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207 | // combine and update gui
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208 | Pair<Way, Command> combineResult;
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209 | try {
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210 | combineResult = combineWaysWorker(selectedWays);
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211 | } catch (UserCancelException ex) {
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212 | return;
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213 | }
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214 |
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215 | if (combineResult == null)
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216 | return;
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217 | final Way selectedWay = combineResult.a;
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218 | Main.main.undoRedo.add(combineResult.b);
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219 | if(selectedWay != null)
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220 | {
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221 | Runnable guiTask = new Runnable() {
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222 | public void run() {
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223 | getCurrentDataSet().setSelected(selectedWay);
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224 | }
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225 | };
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226 | GuiHelper.runInEDT(guiTask);
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227 | }
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228 | }
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229 |
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230 | @Override
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231 | protected void updateEnabledState() {
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232 | if (getCurrentDataSet() == null) {
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233 | setEnabled(false);
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234 | return;
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235 | }
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236 | Collection<OsmPrimitive> selection = getCurrentDataSet().getSelected();
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237 | updateEnabledState(selection);
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238 | }
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239 |
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240 | @Override
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241 | protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
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242 | int numWays = 0;
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243 | for (OsmPrimitive osm : selection)
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244 | if (osm instanceof Way) {
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245 | numWays++;
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246 | }
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247 | setEnabled(numWays >= 2);
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248 | }
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249 |
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250 | static public class NodePair {
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251 | private Node a;
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252 | private Node b;
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253 | public NodePair(Node a, Node b) {
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254 | this.a =a;
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255 | this.b = b;
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256 | }
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257 |
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258 | public NodePair(Pair<Node,Node> pair) {
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259 | this.a = pair.a;
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260 | this.b = pair.b;
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261 | }
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262 |
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263 | public NodePair(NodePair other) {
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264 | this.a = other.a;
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265 | this.b = other.b;
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266 | }
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267 |
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268 | public Node getA() {
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269 | return a;
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270 | }
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271 |
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272 | public Node getB() {
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273 | return b;
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274 | }
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275 |
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276 | public boolean isAdjacentToA(NodePair other) {
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277 | return other.getA() == a || other.getB() == a;
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278 | }
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279 |
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280 | public boolean isAdjacentToB(NodePair other) {
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281 | return other.getA() == b || other.getB() == b;
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282 | }
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283 |
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284 | public boolean isSuccessorOf(NodePair other) {
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285 | return other.getB() == a;
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286 | }
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287 |
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288 | public boolean isPredecessorOf(NodePair other) {
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289 | return b == other.getA();
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290 | }
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291 |
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292 | public NodePair swap() {
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293 | return new NodePair(b,a);
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294 | }
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295 |
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296 | @Override
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297 | public String toString() {
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298 | return new StringBuilder()
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299 | .append("[")
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300 | .append(a.getId())
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301 | .append(",")
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302 | .append(b.getId())
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303 | .append("]")
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304 | .toString();
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305 | }
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306 |
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307 | public boolean contains(Node n) {
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308 | return a == n || b == n;
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309 | }
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310 |
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311 | @Override
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312 | public int hashCode() {
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313 | final int prime = 31;
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314 | int result = 1;
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315 | result = prime * result + ((a == null) ? 0 : a.hashCode());
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316 | result = prime * result + ((b == null) ? 0 : b.hashCode());
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317 | return result;
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318 | }
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319 | @Override
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320 | public boolean equals(Object obj) {
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321 | if (this == obj)
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322 | return true;
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323 | if (obj == null)
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324 | return false;
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325 | if (getClass() != obj.getClass())
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326 | return false;
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327 | NodePair other = (NodePair) obj;
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328 | if (a == null) {
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329 | if (other.a != null)
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330 | return false;
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331 | } else if (!a.equals(other.a))
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332 | return false;
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333 | if (b == null) {
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334 | if (other.b != null)
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335 | return false;
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336 | } else if (!b.equals(other.b))
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337 | return false;
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338 | return true;
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339 | }
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340 | }
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341 |
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342 | static public class NodeGraph {
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343 | static public List<NodePair> buildNodePairs(Way way, boolean directed) {
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344 | ArrayList<NodePair> pairs = new ArrayList<NodePair>();
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345 | for (Pair<Node,Node> pair: way.getNodePairs(false /* don't sort */)) {
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346 | pairs.add(new NodePair(pair));
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347 | if (!directed) {
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348 | pairs.add(new NodePair(pair).swap());
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349 | }
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350 | }
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351 | return pairs;
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352 | }
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353 |
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354 | static public List<NodePair> buildNodePairs(List<Way> ways, boolean directed) {
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355 | ArrayList<NodePair> pairs = new ArrayList<NodePair>();
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356 | for (Way w: ways) {
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357 | pairs.addAll(buildNodePairs(w, directed));
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358 | }
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359 | return pairs;
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360 | }
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361 |
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362 | static public List<NodePair> eliminateDuplicateNodePairs(List<NodePair> pairs) {
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363 | ArrayList<NodePair> cleaned = new ArrayList<NodePair>();
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364 | for(NodePair p: pairs) {
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365 | if (!cleaned.contains(p) && !cleaned.contains(p.swap())) {
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366 | cleaned.add(p);
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367 | }
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368 | }
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369 | return cleaned;
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370 | }
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371 |
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372 | static public NodeGraph createDirectedGraphFromNodePairs(List<NodePair> pairs) {
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373 | NodeGraph graph = new NodeGraph();
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374 | for (NodePair pair: pairs) {
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375 | graph.add(pair);
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376 | }
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377 | return graph;
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378 | }
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379 |
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380 | static public NodeGraph createDirectedGraphFromWays(Collection<Way> ways) {
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381 | NodeGraph graph = new NodeGraph();
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382 | for (Way w: ways) {
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383 | graph.add(buildNodePairs(w, true /* directed */));
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384 | }
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385 | return graph;
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386 | }
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387 |
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388 | static public NodeGraph createUndirectedGraphFromNodeList(List<NodePair> pairs) {
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389 | NodeGraph graph = new NodeGraph();
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390 | for (NodePair pair: pairs) {
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391 | graph.add(pair);
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392 | graph.add(pair.swap());
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393 | }
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394 | return graph;
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395 | }
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396 |
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397 | static public NodeGraph createUndirectedGraphFromNodeWays(Collection<Way> ways) {
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398 | NodeGraph graph = new NodeGraph();
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399 | for (Way w: ways) {
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400 | graph.add(buildNodePairs(w, false /* undirected */));
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401 | }
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402 | return graph;
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403 | }
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404 |
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405 | private Set<NodePair> edges;
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406 | private int numUndirectedEges = 0;
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407 | private HashMap<Node, List<NodePair>> successors;
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408 | private HashMap<Node, List<NodePair>> predecessors;
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409 |
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410 | protected void rememberSuccessor(NodePair pair) {
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411 | if (successors.containsKey(pair.getA())) {
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412 | if (!successors.get(pair.getA()).contains(pair)) {
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413 | successors.get(pair.getA()).add(pair);
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414 | }
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415 | } else {
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416 | ArrayList<NodePair> l = new ArrayList<NodePair>();
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417 | l.add(pair);
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418 | successors.put(pair.getA(), l);
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419 | }
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420 | }
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421 |
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422 | protected void rememberPredecessors(NodePair pair) {
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423 | if (predecessors.containsKey(pair.getB())) {
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424 | if (!predecessors.get(pair.getB()).contains(pair)) {
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425 | predecessors.get(pair.getB()).add(pair);
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426 | }
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427 | } else {
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428 | ArrayList<NodePair> l = new ArrayList<NodePair>();
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429 | l.add(pair);
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430 | predecessors.put(pair.getB(), l);
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431 | }
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432 | }
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433 |
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434 | protected boolean isTerminalNode(Node n) {
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435 | if (successors.get(n) == null) return false;
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436 | if (successors.get(n).size() != 1) return false;
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437 | if (predecessors.get(n) == null) return true;
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438 | if (predecessors.get(n).size() == 1) {
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439 | NodePair p1 = successors.get(n).iterator().next();
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440 | NodePair p2 = predecessors.get(n).iterator().next();
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441 | return p1.equals(p2.swap());
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442 | }
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443 | return false;
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444 | }
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445 |
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446 | protected void prepare() {
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447 | Set<NodePair> undirectedEdges = new LinkedHashSet<NodePair>();
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448 | successors = new LinkedHashMap<Node, List<NodePair>>();
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449 | predecessors = new LinkedHashMap<Node, List<NodePair>>();
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450 |
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451 | for (NodePair pair: edges) {
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452 | if (!undirectedEdges.contains(pair) && ! undirectedEdges.contains(pair.swap())) {
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453 | undirectedEdges.add(pair);
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454 | }
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455 | rememberSuccessor(pair);
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456 | rememberPredecessors(pair);
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457 | }
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458 | numUndirectedEges = undirectedEdges.size();
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459 | }
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460 |
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461 | public NodeGraph() {
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462 | edges = new LinkedHashSet<NodePair>();
|
---|
463 | }
|
---|
464 |
|
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465 | public void add(NodePair pair) {
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466 | if (!edges.contains(pair)) {
|
---|
467 | edges.add(pair);
|
---|
468 | }
|
---|
469 | }
|
---|
470 |
|
---|
471 | public void add(List<NodePair> pairs) {
|
---|
472 | for (NodePair pair: pairs) {
|
---|
473 | add(pair);
|
---|
474 | }
|
---|
475 | }
|
---|
476 |
|
---|
477 | protected Node getStartNode() {
|
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478 | Set<Node> nodes = getNodes();
|
---|
479 | for (Node n: nodes) {
|
---|
480 | if (successors.get(n) != null && successors.get(n).size() ==1)
|
---|
481 | return n;
|
---|
482 | }
|
---|
483 | return null;
|
---|
484 | }
|
---|
485 |
|
---|
486 | protected Set<Node> getTerminalNodes() {
|
---|
487 | Set<Node> ret = new LinkedHashSet<Node>();
|
---|
488 | for (Node n: getNodes()) {
|
---|
489 | if (isTerminalNode(n)) {
|
---|
490 | ret.add(n);
|
---|
491 | }
|
---|
492 | }
|
---|
493 | return ret;
|
---|
494 | }
|
---|
495 |
|
---|
496 | protected Set<Node> getNodes(Stack<NodePair> pairs) {
|
---|
497 | HashSet<Node> nodes = new LinkedHashSet<Node>();
|
---|
498 | for (NodePair pair: pairs) {
|
---|
499 | nodes.add(pair.getA());
|
---|
500 | nodes.add(pair.getB());
|
---|
501 | }
|
---|
502 | return nodes;
|
---|
503 | }
|
---|
504 |
|
---|
505 | protected List<NodePair> getOutboundPairs(NodePair pair) {
|
---|
506 | return getOutboundPairs(pair.getB());
|
---|
507 | }
|
---|
508 |
|
---|
509 | protected List<NodePair> getOutboundPairs(Node node) {
|
---|
510 | List<NodePair> l = successors.get(node);
|
---|
511 | if (l == null)
|
---|
512 | return Collections.emptyList();
|
---|
513 | return l;
|
---|
514 | }
|
---|
515 |
|
---|
516 | protected Set<Node> getNodes() {
|
---|
517 | Set<Node> nodes = new LinkedHashSet<Node>();
|
---|
518 | for (NodePair pair: edges) {
|
---|
519 | nodes.add(pair.getA());
|
---|
520 | nodes.add(pair.getB());
|
---|
521 | }
|
---|
522 | return nodes;
|
---|
523 | }
|
---|
524 |
|
---|
525 | protected boolean isSpanningWay(Stack<NodePair> way) {
|
---|
526 | return numUndirectedEges == way.size();
|
---|
527 | }
|
---|
528 |
|
---|
529 | protected List<Node> buildPathFromNodePairs(Stack<NodePair> path) {
|
---|
530 | LinkedList<Node> ret = new LinkedList<Node>();
|
---|
531 | for (NodePair pair: path) {
|
---|
532 | ret.add(pair.getA());
|
---|
533 | }
|
---|
534 | ret.add(path.peek().getB());
|
---|
535 | return ret;
|
---|
536 | }
|
---|
537 |
|
---|
538 | /**
|
---|
539 | * Tries to find a spanning path starting from node <code>startNode</code>.
|
---|
540 | *
|
---|
541 | * Traverses the path in depth-first order.
|
---|
542 | *
|
---|
543 | * @param startNode the start node
|
---|
544 | * @return the spanning path; null, if no path is found
|
---|
545 | */
|
---|
546 | protected List<Node> buildSpanningPath(Node startNode) {
|
---|
547 | if (startNode == null)
|
---|
548 | return null;
|
---|
549 | Stack<NodePair> path = new Stack<NodePair>();
|
---|
550 | Stack<NodePair> nextPairs = new Stack<NodePair>();
|
---|
551 | nextPairs.addAll(getOutboundPairs(startNode));
|
---|
552 | while(!nextPairs.isEmpty()) {
|
---|
553 | NodePair cur= nextPairs.pop();
|
---|
554 | if (! path.contains(cur) && ! path.contains(cur.swap())) {
|
---|
555 | while(!path.isEmpty() && !path.peek().isPredecessorOf(cur)) {
|
---|
556 | path.pop();
|
---|
557 | }
|
---|
558 | path.push(cur);
|
---|
559 | if (isSpanningWay(path)) return buildPathFromNodePairs(path);
|
---|
560 | nextPairs.addAll(getOutboundPairs(path.peek()));
|
---|
561 | }
|
---|
562 | }
|
---|
563 | return null;
|
---|
564 | }
|
---|
565 |
|
---|
566 | /**
|
---|
567 | * Tries to find a path through the graph which visits each edge (i.e.
|
---|
568 | * the segment of a way) exactly one.
|
---|
569 | *
|
---|
570 | * @return the path; null, if no path was found
|
---|
571 | */
|
---|
572 | public List<Node> buildSpanningPath() {
|
---|
573 | prepare();
|
---|
574 | // try to find a path from each "terminal node", i.e. from a
|
---|
575 | // node which is connected by exactly one undirected edges (or
|
---|
576 | // two directed edges in opposite direction) to the graph. A
|
---|
577 | // graph built up from way segments is likely to include such
|
---|
578 | // nodes, unless all ways are closed.
|
---|
579 | // In the worst case this loops over all nodes which is
|
---|
580 | // very slow for large ways.
|
---|
581 | //
|
---|
582 | Set<Node> nodes = getTerminalNodes();
|
---|
583 | nodes = nodes.isEmpty() ? getNodes() : nodes;
|
---|
584 | for (Node n: nodes) {
|
---|
585 | List<Node> path = buildSpanningPath(n);
|
---|
586 | if (path != null)
|
---|
587 | return path;
|
---|
588 | }
|
---|
589 | return null;
|
---|
590 | }
|
---|
591 | }
|
---|
592 | }
|
---|