1 | // License: GPL. For details, see LICENSE file.
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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 | import static org.openstreetmap.josm.tools.I18n.trn;
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7 |
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8 | import java.awt.event.ActionEvent;
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9 | import java.awt.event.KeyEvent;
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10 | import java.util.ArrayList;
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11 | import java.util.Collection;
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12 | import java.util.Collections;
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13 | import java.util.LinkedHashMap;
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14 | import java.util.LinkedHashSet;
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15 | import java.util.LinkedList;
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16 | import java.util.List;
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17 | import java.util.Map;
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18 | import java.util.Objects;
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19 | import java.util.Set;
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20 | import java.util.Stack;
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21 |
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22 | import javax.swing.JOptionPane;
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23 |
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24 | import org.openstreetmap.josm.Main;
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25 | import org.openstreetmap.josm.command.ChangeCommand;
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26 | import org.openstreetmap.josm.command.Command;
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27 | import org.openstreetmap.josm.command.DeleteCommand;
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28 | import org.openstreetmap.josm.command.SequenceCommand;
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29 | import org.openstreetmap.josm.corrector.ReverseWayTagCorrector;
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30 | import org.openstreetmap.josm.data.osm.DataSet;
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31 | import org.openstreetmap.josm.data.osm.Node;
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32 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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33 | import org.openstreetmap.josm.data.osm.TagCollection;
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34 | import org.openstreetmap.josm.data.osm.Way;
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35 | import org.openstreetmap.josm.data.preferences.BooleanProperty;
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36 | import org.openstreetmap.josm.gui.ExtendedDialog;
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37 | import org.openstreetmap.josm.gui.Notification;
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38 | import org.openstreetmap.josm.gui.conflict.tags.CombinePrimitiveResolverDialog;
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39 | import org.openstreetmap.josm.gui.util.GuiHelper;
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40 | import org.openstreetmap.josm.tools.Pair;
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41 | import org.openstreetmap.josm.tools.Shortcut;
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42 | import org.openstreetmap.josm.tools.UserCancelException;
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43 |
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44 | /**
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45 | * Combines multiple ways into one.
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46 | * @since 213
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47 | */
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48 | public class CombineWayAction extends JosmAction {
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49 |
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50 | private static final BooleanProperty PROP_REVERSE_WAY = new BooleanProperty("tag-correction.reverse-way", true);
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51 |
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52 | /**
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53 | * Constructs a new {@code CombineWayAction}.
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54 | */
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55 | public CombineWayAction() {
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56 | super(tr("Combine Way"), "combineway", tr("Combine several ways into one."),
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57 | Shortcut.registerShortcut("tools:combineway", tr("Tool: {0}", tr("Combine Way")), KeyEvent.VK_C, Shortcut.DIRECT), true);
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58 | putValue("help", ht("/Action/CombineWay"));
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59 | }
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60 |
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61 | protected static boolean confirmChangeDirectionOfWays() {
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62 | ExtendedDialog ed = new ExtendedDialog(Main.parent,
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63 | tr("Change directions?"),
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64 | new String[] {tr("Reverse and Combine"), tr("Cancel")});
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65 | ed.setButtonIcons(new String[] {"wayflip", "cancel"});
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66 | ed.setContent(tr("The ways can not be combined in their current directions. "
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67 | + "Do you want to reverse some of them?"));
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68 | ed.toggleEnable("combineway-reverse");
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69 | ed.showDialog();
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70 | return ed.getValue() == 1;
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71 | }
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72 |
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73 | protected static void warnCombiningImpossible() {
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74 | String msg = tr("Could not combine ways<br>"
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75 | + "(They could not be merged into a single string of nodes)");
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76 | new Notification(msg)
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77 | .setIcon(JOptionPane.INFORMATION_MESSAGE)
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78 | .show();
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79 | return;
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80 | }
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81 |
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82 | protected static Way getTargetWay(Collection<Way> combinedWays) {
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83 | // init with an arbitrary way
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84 | Way targetWay = combinedWays.iterator().next();
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85 |
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86 | // look for the first way already existing on
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87 | // the server
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88 | for (Way w : combinedWays) {
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89 | targetWay = w;
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90 | if (!w.isNew()) {
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91 | break;
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92 | }
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93 | }
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94 | return targetWay;
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95 | }
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96 |
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97 | /**
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98 | * Combine multiple ways into one.
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99 | * @param ways the way to combine to one way
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100 | * @return null if ways cannot be combined. Otherwise returns the combined ways and the commands to combine
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101 | * @throws UserCancelException if the user cancelled a dialog.
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102 | */
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103 | public static Pair<Way, Command> combineWaysWorker(Collection<Way> ways) throws UserCancelException {
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104 |
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105 | // prepare and clean the list of ways to combine
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106 | //
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107 | if (ways == null || ways.isEmpty())
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108 | return null;
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109 | ways.remove(null); // just in case - remove all null ways from the collection
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110 |
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111 | // remove duplicates, preserving order
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112 | ways = new LinkedHashSet<>(ways);
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113 |
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114 | // try to build a new way which includes all the combined ways
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115 | //
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116 | NodeGraph graph = NodeGraph.createNearlyUndirectedGraphFromNodeWays(ways);
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117 | List<Node> path = graph.buildSpanningPath();
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118 | if (path == null) {
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119 | warnCombiningImpossible();
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120 | return null;
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121 | }
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122 | // check whether any ways have been reversed in the process
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123 | // and build the collection of tags used by the ways to combine
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124 | //
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125 | TagCollection wayTags = TagCollection.unionOfAllPrimitives(ways);
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126 |
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127 | final List<Command> reverseWayTagCommands = new LinkedList<>();
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128 | List<Way> reversedWays = new LinkedList<>();
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129 | List<Way> unreversedWays = new LinkedList<>();
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130 | for (Way w: ways) {
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131 | // Treat zero or one-node ways as unreversed as Combine action action is a good way to fix them (see #8971)
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132 | if (w.getNodesCount() < 2 || (path.indexOf(w.getNode(0)) + 1) == path.lastIndexOf(w.getNode(1))) {
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133 | unreversedWays.add(w);
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134 | } else {
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135 | reversedWays.add(w);
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136 | }
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137 | }
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138 | // reverse path if all ways have been reversed
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139 | if (unreversedWays.isEmpty()) {
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140 | Collections.reverse(path);
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141 | unreversedWays = reversedWays;
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142 | reversedWays = null;
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143 | }
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144 | if ((reversedWays != null) && !reversedWays.isEmpty()) {
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145 | if (!confirmChangeDirectionOfWays()) return null;
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146 | // filter out ways that have no direction-dependent tags
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147 | unreversedWays = ReverseWayTagCorrector.irreversibleWays(unreversedWays);
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148 | reversedWays = ReverseWayTagCorrector.irreversibleWays(reversedWays);
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149 | // reverse path if there are more reversed than unreversed ways with direction-dependent tags
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150 | if (reversedWays.size() > unreversedWays.size()) {
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151 | Collections.reverse(path);
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152 | List<Way> tempWays = unreversedWays;
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153 | unreversedWays = reversedWays;
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154 | reversedWays = tempWays;
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155 | }
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156 | // if there are still reversed ways with direction-dependent tags, reverse their tags
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157 | if (!reversedWays.isEmpty() && PROP_REVERSE_WAY.get()) {
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158 | List<Way> unreversedTagWays = new ArrayList<>(ways);
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159 | unreversedTagWays.removeAll(reversedWays);
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160 | ReverseWayTagCorrector reverseWayTagCorrector = new ReverseWayTagCorrector();
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161 | List<Way> reversedTagWays = new ArrayList<>(reversedWays.size());
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162 | for (Way w : reversedWays) {
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163 | Way wnew = new Way(w);
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164 | reversedTagWays.add(wnew);
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165 | reverseWayTagCommands.addAll(reverseWayTagCorrector.execute(w, wnew));
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166 | }
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167 | if (!reverseWayTagCommands.isEmpty()) {
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168 | // commands need to be executed for CombinePrimitiveResolverDialog
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169 | Main.main.undoRedo.add(new SequenceCommand(tr("Reverse Ways"), reverseWayTagCommands));
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170 | }
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171 | wayTags = TagCollection.unionOfAllPrimitives(reversedTagWays);
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172 | wayTags.add(TagCollection.unionOfAllPrimitives(unreversedTagWays));
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173 | }
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174 | }
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175 |
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176 | // create the new way and apply the new node list
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177 | //
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178 | Way targetWay = getTargetWay(ways);
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179 | Way modifiedTargetWay = new Way(targetWay);
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180 | modifiedTargetWay.setNodes(path);
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181 |
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182 | final List<Command> resolution;
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183 | try {
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184 | resolution = CombinePrimitiveResolverDialog.launchIfNecessary(wayTags, ways, Collections.singleton(targetWay));
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185 | } finally {
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186 | if (!reverseWayTagCommands.isEmpty()) {
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187 | // undo reverseWayTagCorrector and merge into SequenceCommand below
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188 | Main.main.undoRedo.undo();
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189 | }
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190 | }
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191 |
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192 | List<Command> cmds = new LinkedList<>();
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193 | List<Way> deletedWays = new LinkedList<>(ways);
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194 | deletedWays.remove(targetWay);
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195 |
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196 | cmds.add(new ChangeCommand(targetWay, modifiedTargetWay));
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197 | cmds.addAll(reverseWayTagCommands);
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198 | cmds.addAll(resolution);
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199 | cmds.add(new DeleteCommand(deletedWays));
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200 | final Command sequenceCommand = new SequenceCommand(/* for correct i18n of plural forms - see #9110 */
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201 | trn("Combine {0} way", "Combine {0} ways", ways.size(), ways.size()), cmds);
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202 |
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203 | return new Pair<>(targetWay, sequenceCommand);
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204 | }
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205 |
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206 | @Override
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207 | public void actionPerformed(ActionEvent event) {
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208 | final DataSet ds = getLayerManager().getEditDataSet();
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209 | if (ds == null)
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210 | return;
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211 | Collection<OsmPrimitive> selection = ds.getSelected();
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212 | Set<Way> selectedWays = OsmPrimitive.getFilteredSet(selection, Way.class);
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213 | if (selectedWays.size() < 2) {
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214 | new Notification(
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215 | tr("Please select at least two ways to combine."))
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216 | .setIcon(JOptionPane.INFORMATION_MESSAGE)
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217 | .setDuration(Notification.TIME_SHORT)
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218 | .show();
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219 | return;
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220 | }
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221 | // combine and update gui
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222 | Pair<Way, Command> combineResult;
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223 | try {
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224 | combineResult = combineWaysWorker(selectedWays);
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225 | } catch (UserCancelException ex) {
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226 | Main.trace(ex);
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227 | return;
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228 | }
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229 |
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230 | if (combineResult == null)
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231 | return;
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232 | final Way selectedWay = combineResult.a;
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233 | Main.main.undoRedo.add(combineResult.b);
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234 | if (selectedWay != null) {
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235 | GuiHelper.runInEDT(() -> ds.setSelected(selectedWay));
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236 | }
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237 | }
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238 |
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239 | @Override
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240 | protected void updateEnabledState() {
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241 | updateEnabledStateOnCurrentSelection();
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242 | }
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243 |
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244 | @Override
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245 | protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
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246 | int numWays = 0;
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247 | for (OsmPrimitive osm : selection) {
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248 | if (osm instanceof Way) {
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249 | numWays++;
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250 | }
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251 | }
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252 | setEnabled(numWays >= 2);
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253 | }
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254 |
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255 | /**
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256 | * A pair of nodes.
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257 | */
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258 | public static class NodePair {
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259 | private final Node a;
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260 | private final Node b;
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261 |
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262 | /**
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263 | * Constructs a new {@code NodePair}.
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264 | * @param a The first node
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265 | * @param b The second node
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266 | */
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267 | public NodePair(Node a, Node b) {
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268 | this.a = a;
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269 | this.b = b;
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270 | }
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271 |
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272 | /**
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273 | * Constructs a new {@code NodePair}.
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274 | * @param pair An existing {@code Pair} of nodes
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275 | */
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276 | public NodePair(Pair<Node, Node> pair) {
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277 | this(pair.a, pair.b);
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278 | }
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279 |
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280 | /**
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281 | * Replies the first node.
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282 | * @return The first node
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283 | */
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284 | public Node getA() {
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285 | return a;
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286 | }
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287 |
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288 | /**
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289 | * Replies the second node
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290 | * @return The second node
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291 | */
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292 | public Node getB() {
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293 | return b;
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294 | }
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295 |
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296 | public boolean isSuccessorOf(NodePair other) {
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297 | return other.getB() == a;
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298 | }
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299 |
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300 | public boolean isPredecessorOf(NodePair other) {
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301 | return b == other.getA();
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302 | }
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303 |
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304 | public NodePair swap() {
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305 | return new NodePair(b, a);
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306 | }
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307 |
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308 | @Override
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309 | public String toString() {
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310 | return new StringBuilder()
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311 | .append('[')
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312 | .append(a.getId())
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313 | .append(',')
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314 | .append(b.getId())
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315 | .append(']')
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316 | .toString();
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317 | }
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318 |
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319 | /**
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320 | * Determines if this pair contains the given node.
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321 | * @param n The node to look for
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322 | * @return {@code true} if {@code n} is in the pair, {@code false} otherwise
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323 | */
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324 | public boolean contains(Node n) {
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325 | return a == n || b == n;
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326 | }
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327 |
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328 | @Override
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329 | public int hashCode() {
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330 | return Objects.hash(a, b);
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331 | }
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332 |
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333 | @Override
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334 | public boolean equals(Object obj) {
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335 | if (this == obj) return true;
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336 | if (obj == null || getClass() != obj.getClass()) return false;
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337 | NodePair nodePair = (NodePair) obj;
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338 | return Objects.equals(a, nodePair.a) &&
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339 | Objects.equals(b, nodePair.b);
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340 | }
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341 | }
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342 |
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343 | public static class NodeGraph {
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344 | public static List<NodePair> buildNodePairs(Way way, boolean directed) {
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345 | List<NodePair> pairs = new ArrayList<>();
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346 | for (Pair<Node, Node> pair: way.getNodePairs(false /* don't sort */)) {
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347 | pairs.add(new NodePair(pair));
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348 | if (!directed) {
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349 | pairs.add(new NodePair(pair).swap());
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350 | }
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351 | }
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352 | return pairs;
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353 | }
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354 |
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355 | public static List<NodePair> buildNodePairs(List<Way> ways, boolean directed) {
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356 | List<NodePair> pairs = new ArrayList<>();
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357 | for (Way w: ways) {
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358 | pairs.addAll(buildNodePairs(w, directed));
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359 | }
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360 | return pairs;
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361 | }
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362 |
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363 | public static List<NodePair> eliminateDuplicateNodePairs(List<NodePair> pairs) {
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364 | List<NodePair> cleaned = new ArrayList<>();
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365 | for (NodePair p: pairs) {
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366 | if (!cleaned.contains(p) && !cleaned.contains(p.swap())) {
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367 | cleaned.add(p);
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368 | }
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369 | }
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370 | return cleaned;
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371 | }
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372 |
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373 | public static NodeGraph createDirectedGraphFromNodePairs(List<NodePair> pairs) {
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374 | NodeGraph graph = new NodeGraph();
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375 | for (NodePair pair: pairs) {
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376 | graph.add(pair);
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377 | }
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378 | return graph;
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379 | }
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380 |
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381 | public static NodeGraph createDirectedGraphFromWays(Collection<Way> ways) {
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382 | NodeGraph graph = new NodeGraph();
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383 | for (Way w: ways) {
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384 | graph.add(buildNodePairs(w, true /* directed */));
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385 | }
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386 | return graph;
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387 | }
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388 |
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389 | /**
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390 | * Create an undirected graph from the given node pairs.
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391 | * @param pairs Node pairs to build the graph from
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392 | * @return node graph structure
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393 | */
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394 | public static NodeGraph createUndirectedGraphFromNodeList(List<NodePair> pairs) {
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395 | NodeGraph graph = new NodeGraph();
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396 | for (NodePair pair: pairs) {
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397 | graph.add(pair);
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398 | graph.add(pair.swap());
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399 | }
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400 | return graph;
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401 | }
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402 |
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403 | /**
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404 | * Create an undirected graph from the given ways, but prevent reversing of all
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405 | * non-new ways by fix one direction.
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406 | * @param ways Ways to build the graph from
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407 | * @return node graph structure
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408 | * @since 8181
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409 | */
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410 | public static NodeGraph createUndirectedGraphFromNodeWays(Collection<Way> ways) {
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411 | NodeGraph graph = new NodeGraph();
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412 | for (Way w: ways) {
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413 | graph.add(buildNodePairs(w, false /* undirected */));
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414 | }
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415 | return graph;
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416 | }
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417 |
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418 | public static NodeGraph createNearlyUndirectedGraphFromNodeWays(Collection<Way> ways) {
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419 | boolean dir = true;
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420 | NodeGraph graph = new NodeGraph();
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421 | for (Way w: ways) {
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422 | if (!w.isNew()) {
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423 | /* let the first non-new way give the direction (see #5880) */
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424 | graph.add(buildNodePairs(w, dir));
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425 | dir = false;
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426 | } else {
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427 | graph.add(buildNodePairs(w, false /* undirected */));
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428 | }
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429 | }
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430 | return graph;
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431 | }
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432 |
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433 | private final Set<NodePair> edges;
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434 | private int numUndirectedEges;
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435 | private final Map<Node, List<NodePair>> successors = new LinkedHashMap<>();
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436 | private final Map<Node, List<NodePair>> predecessors = new LinkedHashMap<>();
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437 |
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438 | protected void rememberSuccessor(NodePair pair) {
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439 | if (successors.containsKey(pair.getA())) {
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440 | if (!successors.get(pair.getA()).contains(pair)) {
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441 | successors.get(pair.getA()).add(pair);
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442 | }
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443 | } else {
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444 | List<NodePair> l = new ArrayList<>();
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445 | l.add(pair);
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446 | successors.put(pair.getA(), l);
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447 | }
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448 | }
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449 |
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450 | protected void rememberPredecessors(NodePair pair) {
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451 | if (predecessors.containsKey(pair.getB())) {
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452 | if (!predecessors.get(pair.getB()).contains(pair)) {
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453 | predecessors.get(pair.getB()).add(pair);
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454 | }
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455 | } else {
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456 | List<NodePair> l = new ArrayList<>();
|
---|
457 | l.add(pair);
|
---|
458 | predecessors.put(pair.getB(), l);
|
---|
459 | }
|
---|
460 | }
|
---|
461 |
|
---|
462 | protected boolean isTerminalNode(Node n) {
|
---|
463 | if (successors.get(n) == null) return false;
|
---|
464 | if (successors.get(n).size() != 1) return false;
|
---|
465 | if (predecessors.get(n) == null) return true;
|
---|
466 | if (predecessors.get(n).size() == 1) {
|
---|
467 | NodePair p1 = successors.get(n).get(0);
|
---|
468 | NodePair p2 = predecessors.get(n).get(0);
|
---|
469 | return p1.equals(p2.swap());
|
---|
470 | }
|
---|
471 | return false;
|
---|
472 | }
|
---|
473 |
|
---|
474 | protected void prepare() {
|
---|
475 | Set<NodePair> undirectedEdges = new LinkedHashSet<>();
|
---|
476 | successors.clear();
|
---|
477 | predecessors.clear();
|
---|
478 |
|
---|
479 | for (NodePair pair: edges) {
|
---|
480 | if (!undirectedEdges.contains(pair) && !undirectedEdges.contains(pair.swap())) {
|
---|
481 | undirectedEdges.add(pair);
|
---|
482 | }
|
---|
483 | rememberSuccessor(pair);
|
---|
484 | rememberPredecessors(pair);
|
---|
485 | }
|
---|
486 | numUndirectedEges = undirectedEdges.size();
|
---|
487 | }
|
---|
488 |
|
---|
489 | /**
|
---|
490 | * Constructs a new {@code NodeGraph}.
|
---|
491 | */
|
---|
492 | public NodeGraph() {
|
---|
493 | edges = new LinkedHashSet<>();
|
---|
494 | }
|
---|
495 |
|
---|
496 | public void add(NodePair pair) {
|
---|
497 | if (!edges.contains(pair)) {
|
---|
498 | edges.add(pair);
|
---|
499 | }
|
---|
500 | }
|
---|
501 |
|
---|
502 | public void add(List<NodePair> pairs) {
|
---|
503 | for (NodePair pair: pairs) {
|
---|
504 | add(pair);
|
---|
505 | }
|
---|
506 | }
|
---|
507 |
|
---|
508 | protected Set<Node> getTerminalNodes() {
|
---|
509 | Set<Node> ret = new LinkedHashSet<>();
|
---|
510 | for (Node n: getNodes()) {
|
---|
511 | if (isTerminalNode(n)) {
|
---|
512 | ret.add(n);
|
---|
513 | }
|
---|
514 | }
|
---|
515 | return ret;
|
---|
516 | }
|
---|
517 |
|
---|
518 | protected List<NodePair> getOutboundPairs(NodePair pair) {
|
---|
519 | return getOutboundPairs(pair.getB());
|
---|
520 | }
|
---|
521 |
|
---|
522 | protected List<NodePair> getOutboundPairs(Node node) {
|
---|
523 | List<NodePair> l = successors.get(node);
|
---|
524 | if (l == null)
|
---|
525 | return Collections.emptyList();
|
---|
526 | return l;
|
---|
527 | }
|
---|
528 |
|
---|
529 | protected Set<Node> getNodes() {
|
---|
530 | Set<Node> nodes = new LinkedHashSet<>(2 * edges.size());
|
---|
531 | for (NodePair pair: edges) {
|
---|
532 | nodes.add(pair.getA());
|
---|
533 | nodes.add(pair.getB());
|
---|
534 | }
|
---|
535 | return nodes;
|
---|
536 | }
|
---|
537 |
|
---|
538 | protected boolean isSpanningWay(Stack<NodePair> way) {
|
---|
539 | return numUndirectedEges == way.size();
|
---|
540 | }
|
---|
541 |
|
---|
542 | protected List<Node> buildPathFromNodePairs(Stack<NodePair> path) {
|
---|
543 | List<Node> ret = new LinkedList<>();
|
---|
544 | for (NodePair pair: path) {
|
---|
545 | ret.add(pair.getA());
|
---|
546 | }
|
---|
547 | ret.add(path.peek().getB());
|
---|
548 | return ret;
|
---|
549 | }
|
---|
550 |
|
---|
551 | /**
|
---|
552 | * Tries to find a spanning path starting from node <code>startNode</code>.
|
---|
553 | *
|
---|
554 | * Traverses the path in depth-first order.
|
---|
555 | *
|
---|
556 | * @param startNode the start node
|
---|
557 | * @return the spanning path; null, if no path is found
|
---|
558 | */
|
---|
559 | protected List<Node> buildSpanningPath(Node startNode) {
|
---|
560 | if (startNode == null)
|
---|
561 | return null;
|
---|
562 | Stack<NodePair> path = new Stack<>();
|
---|
563 | Stack<NodePair> nextPairs = new Stack<>();
|
---|
564 | nextPairs.addAll(getOutboundPairs(startNode));
|
---|
565 | while (!nextPairs.isEmpty()) {
|
---|
566 | NodePair cur = nextPairs.pop();
|
---|
567 | if (!path.contains(cur) && !path.contains(cur.swap())) {
|
---|
568 | while (!path.isEmpty() && !path.peek().isPredecessorOf(cur)) {
|
---|
569 | path.pop();
|
---|
570 | }
|
---|
571 | path.push(cur);
|
---|
572 | if (isSpanningWay(path)) return buildPathFromNodePairs(path);
|
---|
573 | nextPairs.addAll(getOutboundPairs(path.peek()));
|
---|
574 | }
|
---|
575 | }
|
---|
576 | return null;
|
---|
577 | }
|
---|
578 |
|
---|
579 | /**
|
---|
580 | * Tries to find a path through the graph which visits each edge (i.e.
|
---|
581 | * the segment of a way) exactly once.
|
---|
582 | *
|
---|
583 | * @return the path; null, if no path was found
|
---|
584 | */
|
---|
585 | public List<Node> buildSpanningPath() {
|
---|
586 | prepare();
|
---|
587 | // try to find a path from each "terminal node", i.e. from a
|
---|
588 | // node which is connected by exactly one undirected edges (or
|
---|
589 | // two directed edges in opposite direction) to the graph. A
|
---|
590 | // graph built up from way segments is likely to include such
|
---|
591 | // nodes, unless all ways are closed.
|
---|
592 | // In the worst case this loops over all nodes which is very slow for large ways.
|
---|
593 | //
|
---|
594 | Set<Node> nodes = getTerminalNodes();
|
---|
595 | nodes = nodes.isEmpty() ? getNodes() : nodes;
|
---|
596 | for (Node n: nodes) {
|
---|
597 | List<Node> path = buildSpanningPath(n);
|
---|
598 | if (path != null)
|
---|
599 | return path;
|
---|
600 | }
|
---|
601 | return null;
|
---|
602 | }
|
---|
603 | }
|
---|
604 | }
|
---|