1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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2 | package org.openstreetmap.josm.command;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.trn;
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5 |
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6 | import java.util.Collection;
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7 | import java.util.Collections;
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8 | import java.util.Iterator;
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9 | import java.util.LinkedList;
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10 | import java.util.List;
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11 | import javax.swing.Icon;
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12 |
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13 | import org.openstreetmap.josm.data.coor.EastNorth;
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14 | import org.openstreetmap.josm.data.coor.LatLon;
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15 | import org.openstreetmap.josm.data.osm.Node;
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16 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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17 | import org.openstreetmap.josm.data.osm.visitor.AllNodesVisitor;
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18 | import org.openstreetmap.josm.data.projection.Projections;
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19 | import org.openstreetmap.josm.tools.ImageProvider;
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20 |
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21 | /**
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22 | * MoveCommand moves a set of OsmPrimitives along the map. It can be moved again
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23 | * to collect several MoveCommands into one command.
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24 | *
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25 | * @author imi
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26 | */
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27 | public class MoveCommand extends Command {
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28 | /**
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29 | * The objects that should be moved.
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30 | */
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31 | private Collection<Node> nodes = new LinkedList<Node>();
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32 | /**
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33 | * Starting position, base command point, current (mouse-drag) position = startEN + (x,y) =
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34 | */
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35 | private EastNorth startEN;
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36 |
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37 | /**
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38 | * x difference movement. Coordinates are in northern/eastern
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39 | */
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40 | private double x;
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41 | /**
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42 | * y difference movement. Coordinates are in northern/eastern
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43 | */
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44 | private double y;
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45 |
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46 | private double backupX;
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47 | private double backupY;
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48 |
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49 | /**
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50 | * Small helper for holding the interesting part of the old data state of the
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51 | * objects.
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52 | */
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53 | public static class OldState {
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54 | LatLon latlon;
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55 | EastNorth en; // cached EastNorth to be used for applying exact displacenment
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56 | boolean modified;
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57 | }
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58 |
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59 | /**
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60 | * List of all old states of the objects.
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61 | */
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62 | private List<OldState> oldState = new LinkedList<OldState>();
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63 |
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64 | public MoveCommand(OsmPrimitive osm, double x, double y) {
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65 | this(Collections.singleton(osm), x, y);
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66 | }
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67 |
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68 | public MoveCommand(Node node, LatLon position) {
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69 | this(Collections.singleton((OsmPrimitive) node), node.getEastNorth().sub(Projections.project(position)));
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70 | }
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71 |
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72 | public MoveCommand(Collection<OsmPrimitive> objects, EastNorth offset) {
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73 | this(objects, offset.getX(), offset.getY());
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74 | }
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75 |
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76 | /**
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77 | * Create a MoveCommand and assign the initial object set and movement vector.
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78 | */
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79 | public MoveCommand(Collection<OsmPrimitive> objects, double x, double y) {
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80 | super();
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81 | startEN = null;
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82 | saveCheckpoint(); // (0,0) displacement will be saved
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83 | this.x = x;
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84 | this.y = y;
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85 | this.nodes = AllNodesVisitor.getAllNodes(objects);
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86 | for (Node n : this.nodes) {
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87 | OldState os = new OldState();
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88 | os.latlon = new LatLon(n.getCoor());
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89 | os.en = n.getEastNorth();
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90 | os.modified = n.isModified();
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91 | oldState.add(os);
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92 | }
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93 | }
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94 |
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95 | public MoveCommand(Collection<OsmPrimitive> objects, EastNorth start, EastNorth end) {
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96 | this(objects, end.getX()-start.getX(), end.getY()-start.getY());
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97 | startEN = start;
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98 | }
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99 |
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100 | public MoveCommand(OsmPrimitive p, EastNorth start, EastNorth end) {
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101 | this(Collections.singleton(p), end.getX()-start.getX(), end.getY()-start.getY());
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102 | startEN = start;
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103 | }
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104 |
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105 | /**
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106 | * Move the same set of objects again by the specified vector. The vectors
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107 | * are added together and so the resulting will be moved to the previous
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108 | * vector plus this one.
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109 | *
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110 | * The move is immediately executed and any undo will undo both vectors to
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111 | * the original position the objects had before first moving.
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112 | */
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113 | public void moveAgain(double x, double y) {
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114 | for (Node n : nodes) {
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115 | n.setEastNorth(n.getEastNorth().add(x, y));
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116 | }
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117 | this.x += x;
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118 | this.y += y;
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119 | }
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120 |
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121 | public void moveAgainTo(double x, double y) {
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122 | moveAgain(x - this.x, y - this.y);
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123 | }
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124 |
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125 | /**
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126 | * Change the displacement vector to have endpoint @param currentEN
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127 | * starting point is startEN
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128 | */
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129 | public void applyVectorTo(EastNorth currentEN) {
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130 | if (startEN == null)
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131 | return;
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132 | x = currentEN.getX() - startEN.getX();
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133 | y = currentEN.getY() - startEN.getY();
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134 | updateCoordinates();
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135 | }
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136 |
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137 | /**
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138 | * Changes base point of movement
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139 | * @param newDraggedStartPoint - new starting point after movement (where user clicks to start new drag)
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140 | */
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141 | public void changeStartPoint(EastNorth newDraggedStartPoint) {
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142 | startEN = new EastNorth(newDraggedStartPoint.getX()-x, newDraggedStartPoint.getY()-y);
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143 | }
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144 |
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145 | /**
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146 | * Save curent displacement to restore in case of some problems
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147 | */
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148 | public void saveCheckpoint() {
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149 | backupX = x;
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150 | backupY = y;
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151 | }
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152 |
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153 | /**
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154 | * Restore old displacement in case of some problems
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155 | */
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156 | public void resetToCheckpoint() {
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157 | x = backupX;
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158 | y = backupY;
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159 | updateCoordinates();
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160 | }
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161 |
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162 | private void updateCoordinates() {
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163 | Iterator<OldState> it = oldState.iterator();
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164 | for (Node n : nodes) {
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165 | OldState os = it.next();
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166 | n.setEastNorth(os.en.add(x, y));
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167 | }
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168 | }
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169 |
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170 | @Override public boolean executeCommand() {
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171 | for (Node n : nodes) {
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172 | // in case #3892 happens again
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173 | if (n == null)
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174 | throw new AssertionError("null detected in node list");
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175 | if (n.getEastNorth() == null)
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176 | throw new AssertionError("null coordinates detected in node list");
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177 |
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178 | n.setEastNorth(n.getEastNorth().add(x, y));
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179 | n.setModified(true);
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180 | }
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181 | return true;
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182 | }
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183 |
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184 | @Override public void undoCommand() {
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185 | Iterator<OldState> it = oldState.iterator();
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186 | for (Node n : nodes) {
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187 | OldState os = it.next();
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188 | n.setCoor(os.latlon);
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189 | n.setModified(os.modified);
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190 | }
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191 | }
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192 |
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193 | @Override public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted, Collection<OsmPrimitive> added) {
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194 | for (OsmPrimitive osm : nodes) {
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195 | modified.add(osm);
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196 | }
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197 | }
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198 |
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199 | @Override
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200 | public String getDescriptionText() {
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201 | return trn("Move {0} node", "Move {0} nodes", nodes.size(), nodes.size());
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202 | }
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203 |
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204 | @Override
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205 | public Icon getDescriptionIcon() {
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206 | return ImageProvider.get("data", "node");
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207 | }
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208 |
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209 | @Override
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210 | public Collection<Node> getParticipatingPrimitives() {
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211 | return nodes;
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212 | }
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213 | }
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