1 | // License: GPL. For details, see LICENSE file.
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2 | package MichiganLeft;
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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.event.ActionEvent;
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7 | import java.awt.event.KeyEvent;
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8 | import java.util.ArrayList;
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9 | import java.util.Collection;
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10 | import java.util.Enumeration;
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11 | import java.util.Hashtable;
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12 | import java.util.LinkedList;
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13 |
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14 | import javax.swing.JMenuItem;
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15 | import javax.swing.JOptionPane;
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16 |
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17 | import org.openstreetmap.josm.actions.JosmAction;
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18 | import org.openstreetmap.josm.command.AddCommand;
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19 | import org.openstreetmap.josm.command.Command;
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20 | import org.openstreetmap.josm.command.SequenceCommand;
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21 | import org.openstreetmap.josm.data.UndoRedoHandler;
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22 | import org.openstreetmap.josm.data.osm.DataSet;
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23 | import org.openstreetmap.josm.data.osm.Node;
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24 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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25 | import org.openstreetmap.josm.data.osm.Relation;
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26 | import org.openstreetmap.josm.data.osm.RelationMember;
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27 | import org.openstreetmap.josm.data.osm.Way;
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28 | import org.openstreetmap.josm.gui.MainApplication;
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29 | import org.openstreetmap.josm.gui.MainMenu;
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30 | import org.openstreetmap.josm.plugins.Plugin;
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31 | import org.openstreetmap.josm.plugins.PluginInformation;
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32 | import org.openstreetmap.josm.tools.Shortcut;
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33 |
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34 | /**
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35 | * Plugin for easily creating turn restrictions at "Michigan left" intersections.
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36 | */
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37 | public class MichiganLeft extends Plugin {
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38 | JMenuItem MichiganLeft;
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39 |
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40 | /**
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41 | * Constructs a new {@code MichiganLeft} plugin.
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42 | *
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43 | * @param info plugin info
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44 | */
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45 | public MichiganLeft(PluginInformation info) {
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46 | super(info);
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47 | MichiganLeft = MainMenu.add(MainApplication.getMenu().dataMenu, new MichiganLeftAction());
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48 | }
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49 |
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50 | private static class MichiganLeftAction extends JosmAction {
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51 | private LinkedList<Command> cmds = new LinkedList<>();
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52 |
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53 | MichiganLeftAction() {
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54 | super(tr("Michigan Left"), "michigan_left",
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55 | tr("Adds no left turn for sets of 4 or 5 ways."),
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56 | Shortcut.registerShortcut("tools:michigan_left",
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57 | tr("Data: {0}", tr("Michigan Left")), KeyEvent.VK_N, Shortcut.ALT_SHIFT), true);
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58 | }
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59 |
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60 | @Override
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61 | public void actionPerformed(ActionEvent e) {
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62 | DataSet ds = MainApplication.getLayerManager().getEditDataSet();
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63 | Collection<OsmPrimitive> mainSelection = ds.getSelected();
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64 |
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65 | ArrayList<OsmPrimitive> selection = new ArrayList<>();
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66 |
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67 | for (OsmPrimitive prim : mainSelection) {
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68 | selection.add(prim);
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69 | }
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70 |
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71 | int ways = 0;
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72 | for (OsmPrimitive prim : selection) {
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73 | if (prim instanceof Way)
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74 | ways++;
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75 | }
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76 |
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77 | if ((ways != 4) && (ways != 5)) {
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78 | JOptionPane.showMessageDialog(MainApplication.getMainFrame(),
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79 | tr("Please select 4 or 5 ways to assign no left turns."));
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80 | return;
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81 | }
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82 |
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83 | if (ways == 4) {
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84 | // Find extremities of ways
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85 | Hashtable<Node, Integer> extremNodes = new Hashtable<>();
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86 | for (OsmPrimitive prim : selection) {
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87 | if (prim instanceof Way) {
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88 | Way way = (Way) prim;
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89 | incrementHashtable(extremNodes, way.firstNode());
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90 | incrementHashtable(extremNodes, way.lastNode());
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91 | }
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92 | }
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93 | if (extremNodes.size() != 4) {
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94 | JOptionPane.showMessageDialog(MainApplication.getMainFrame(),
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95 | tr("Please select 4 ways that form a closed relation."));
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96 | return;
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97 | }
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98 |
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99 | // order the ways
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100 | ArrayList<Way> orderedWays = new ArrayList<>();
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101 | Way currentWay = (Way) selection.iterator().next();
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102 | orderedWays.add(currentWay);
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103 | selection.remove(currentWay);
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104 | while (selection.size() > 0) {
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105 | boolean found = false;
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106 | Node nextNode = currentWay.lastNode();
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107 | for (OsmPrimitive prim : selection) {
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108 | Way tmpWay = (Way) prim;
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109 | if (tmpWay.firstNode() == nextNode) {
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110 | orderedWays.add(tmpWay);
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111 | selection.remove(prim);
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112 | currentWay = tmpWay;
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113 | found = true;
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114 | break;
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115 | }
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116 | }
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117 | if (!found) {
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118 | JOptionPane.showMessageDialog(MainApplication.getMainFrame(),
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119 | tr("Unable to order the ways. Please verify their directions"));
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120 | return;
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121 | }
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122 | }
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123 |
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124 | // Build relations
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125 | for (int index = 0; index < 4; index++) {
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126 | Way firstWay = orderedWays.get(index);
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127 | Way lastWay = orderedWays.get((index + 1) % 4);
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128 | Node lastNode = firstWay.lastNode();
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129 |
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130 | cmds.add(new AddCommand(ds, buildRelation(firstWay, lastWay, lastNode)));
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131 | }
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132 | Command c = new SequenceCommand(tr("Create Michigan left turn restriction"), cmds);
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133 | UndoRedoHandler.getInstance().add(c);
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134 | cmds.clear();
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135 | }
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136 |
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137 | if (ways == 5) {
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138 | // Find extremities of ways
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139 | Hashtable<Node, Integer> extremNodes = new Hashtable<>();
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140 | for (OsmPrimitive prim : selection) {
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141 | if (prim instanceof Way) {
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142 | Way way = (Way) prim;
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143 | incrementHashtable(extremNodes, way.firstNode());
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144 | incrementHashtable(extremNodes, way.lastNode());
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145 | }
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146 | }
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147 |
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148 | ArrayList<Node> viaNodes = new ArrayList<>();
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149 | // find via nodes (they have 3 occurences in the list)
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150 | for (Enumeration<Node> enumKey = extremNodes.keys(); enumKey.hasMoreElements();) {
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151 | Node extrem = enumKey.nextElement();
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152 | Integer nb = extremNodes.get(extrem);
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153 | if (nb.intValue() == 3) {
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154 | viaNodes.add(extrem);
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155 | }
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156 | }
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157 |
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158 | if (viaNodes.size() != 2) {
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159 | JOptionPane.showMessageDialog(MainApplication.getMainFrame(),
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160 | tr("Unable to find via nodes. Please check your selection"));
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161 | return;
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162 | }
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163 |
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164 | Node viaFirst = viaNodes.get(0);
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165 | Node viaLast = viaNodes.get(1); // Find middle segment
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166 |
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167 | Way middle = null;
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168 | for (OsmPrimitive prim : selection) {
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169 | if (prim instanceof Way) {
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170 | Way way = (Way) prim;
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171 | Node first = way.firstNode();
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172 | Node last = way.lastNode();
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173 |
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174 | if ((first.equals(viaFirst) && last.equals(viaLast))
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175 | || (first.equals(viaLast) && last.equals(viaFirst)))
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176 | middle = way;
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177 | }
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178 | }
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179 |
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180 | // Build relations
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181 | for (OsmPrimitive prim : selection) {
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182 | if (prim instanceof Way) {
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183 | Way way = (Way) prim;
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184 | if (way != middle) {
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185 | Node first = way.firstNode();
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186 | Node last = way.lastNode();
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187 |
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188 | if (first == viaFirst)
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189 | buildRelation(middle, way, viaNodes.get(0));
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190 | else if (first == viaLast)
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191 | buildRelation(middle, way, viaNodes.get(1));
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192 | else if (last == viaFirst)
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193 | buildRelation(way, middle, viaNodes.get(0));
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194 | else if (last == viaLast)
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195 | buildRelation(way, middle, viaNodes.get(1));
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196 | }
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197 | }
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198 | }
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199 | Command c = new SequenceCommand(tr("Create Michigan left turn restriction"), cmds);
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200 | UndoRedoHandler.getInstance().add(c);
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201 | cmds.clear();
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202 | }
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203 | }
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204 |
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205 | public void incrementHashtable(Hashtable<Node, Integer> hash, Node node) {
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206 | if (hash.containsKey(node)) {
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207 | Integer nb = hash.get(node);
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208 | hash.put(node, Integer.valueOf(nb.intValue() + 1));
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209 | } else {
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210 | hash.put(node, Integer.valueOf(1));
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211 | }
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212 | }
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213 |
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214 | public Relation buildRelation(Way fromWay, Way toWay, Node viaNode) {
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215 | Relation relation = new Relation();
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216 |
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217 | RelationMember from = new RelationMember("from", fromWay);
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218 | relation.addMember(from);
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219 |
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220 | RelationMember to = new RelationMember("to", toWay);
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221 | relation.addMember(to);
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222 |
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223 | RelationMember via = new RelationMember("via", viaNode);
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224 | relation.addMember(via);
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225 |
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226 | relation.put("type", "restriction");
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227 | relation.put("restriction", "no_left_turn");
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228 |
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229 | return relation;
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230 | }
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231 |
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232 | @Override
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233 | protected void updateEnabledState() {
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234 | setEnabled(getLayerManager().getEditLayer() != null);
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235 | }
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236 |
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237 | @Override
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238 | protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
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239 | // do nothing
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240 | }
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241 | }
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242 | }
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