1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.command;
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3 |
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4 | import java.awt.GridBagLayout;
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5 | import java.util.ArrayList;
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6 | import java.util.Collection;
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7 | import java.util.HashMap;
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8 | import java.util.LinkedHashMap;
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9 | import java.util.Map;
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10 | import java.util.Map.Entry;
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11 |
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12 | import javax.swing.JOptionPane;
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13 | import javax.swing.JPanel;
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14 |
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15 | import org.openstreetmap.josm.Main;
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16 | import org.openstreetmap.josm.data.coor.EastNorth;
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17 | import org.openstreetmap.josm.data.coor.LatLon;
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18 | import org.openstreetmap.josm.data.osm.Node;
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19 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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20 | import org.openstreetmap.josm.data.osm.PrimitiveData;
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21 | import org.openstreetmap.josm.data.osm.Relation;
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22 | import org.openstreetmap.josm.data.osm.Way;
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23 | import org.openstreetmap.josm.data.osm.visitor.AbstractVisitor;
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24 | import org.openstreetmap.josm.gui.ConditionalOptionPaneUtil;
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25 | import org.openstreetmap.josm.gui.layer.Layer;
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26 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
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27 | import org.openstreetmap.josm.gui.widgets.JMultilineLabel;
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28 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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29 |
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30 | /**
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31 | * Classes implementing Command modify a dataset in a specific way. A command is
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32 | * one atomic action on a specific dataset, such as move or delete.
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33 | *
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34 | * The command remembers the {@link OsmDataLayer} it is operating on.
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35 | *
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36 | * @author imi
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37 | */
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38 | public abstract class Command extends PseudoCommand {
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39 |
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40 | private static final class CloneVisitor extends AbstractVisitor {
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41 | public final Map<OsmPrimitive, PrimitiveData> orig = new LinkedHashMap<>();
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42 |
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43 | @Override
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44 | public void visit(Node n) {
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45 | orig.put(n, n.save());
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46 | }
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47 | @Override
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48 | public void visit(Way w) {
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49 | orig.put(w, w.save());
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50 | }
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51 | @Override
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52 | public void visit(Relation e) {
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53 | orig.put(e, e.save());
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54 | }
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55 | }
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56 |
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57 | /**
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58 | * Small helper for holding the interesting part of the old data state of the objects.
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59 | */
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60 | public static class OldNodeState {
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61 |
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62 | private final LatLon latlon;
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63 | private final EastNorth eastNorth; // cached EastNorth to be used for applying exact displacement
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64 | private final boolean modified;
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65 |
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66 | /**
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67 | * Constructs a new {@code OldNodeState} for the given node.
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68 | * @param node The node whose state has to be remembered
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69 | */
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70 | public OldNodeState(Node node){
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71 | latlon = node.getCoor();
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72 | eastNorth = node.getEastNorth();
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73 | modified = node.isModified();
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74 | }
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75 |
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76 | /**
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77 | * Returns old lat/lon.
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78 | * @return old lat/lon
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79 | * @see Node#getCoor()
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80 | */
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81 | public final LatLon getLatlon() {
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82 | return latlon;
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83 | }
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84 |
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85 | /**
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86 | * Returns old east/north.
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87 | * @return old east/north
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88 | * @see Node#getEastNorth()
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89 | */
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90 | public final EastNorth getEastNorth() {
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91 | return eastNorth;
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92 | }
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93 |
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94 | /**
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95 | * Returns old modified state.
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96 | * @return old modified state
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97 | * @see Node #isModified()
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98 | */
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99 | public final boolean isModified() {
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100 | return modified;
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101 | }
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102 |
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103 | @Override
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104 | public int hashCode() {
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105 | final int prime = 31;
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106 | int result = 1;
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107 | result = prime * result + ((eastNorth == null) ? 0 : eastNorth.hashCode());
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108 | result = prime * result + ((latlon == null) ? 0 : latlon.hashCode());
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109 | result = prime * result + (modified ? 1231 : 1237);
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110 | return result;
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111 | }
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112 |
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113 | @Override
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114 | public boolean equals(Object obj) {
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115 | if (this == obj)
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116 | return true;
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117 | if (obj == null)
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118 | return false;
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119 | if (getClass() != obj.getClass())
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120 | return false;
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121 | OldNodeState other = (OldNodeState) obj;
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122 | if (eastNorth == null) {
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123 | if (other.eastNorth != null)
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124 | return false;
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125 | } else if (!eastNorth.equals(other.eastNorth))
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126 | return false;
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127 | if (latlon == null) {
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128 | if (other.latlon != null)
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129 | return false;
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130 | } else if (!latlon.equals(other.latlon))
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131 | return false;
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132 | if (modified != other.modified)
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133 | return false;
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134 | return true;
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135 | }
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136 | }
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137 |
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138 | /** the map of OsmPrimitives in the original state to OsmPrimitives in cloned state */
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139 | private Map<OsmPrimitive, PrimitiveData> cloneMap = new HashMap<>();
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140 |
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141 | /** the layer which this command is applied to */
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142 | private final OsmDataLayer layer;
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143 |
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144 | /**
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145 | * Creates a new command in the context of the current edit layer, if any
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146 | */
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147 | public Command() {
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148 | this.layer = Main.main == null ? null : Main.main.getEditLayer();
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149 | }
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150 |
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151 | /**
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152 | * Creates a new command in the context of a specific data layer
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153 | *
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154 | * @param layer the data layer. Must not be null.
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155 | * @throws IllegalArgumentException if layer is null
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156 | */
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157 | public Command(OsmDataLayer layer) {
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158 | CheckParameterUtil.ensureParameterNotNull(layer, "layer");
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159 | this.layer = layer;
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160 | }
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161 |
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162 | /**
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163 | * Executes the command on the dataset. This implementation will remember all
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164 | * primitives returned by fillModifiedData for restoring them on undo.
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165 | * @return true
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166 | */
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167 | public boolean executeCommand() {
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168 | CloneVisitor visitor = new CloneVisitor();
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169 | Collection<OsmPrimitive> all = new ArrayList<>();
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170 | fillModifiedData(all, all, all);
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171 | for (OsmPrimitive osm : all) {
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172 | osm.accept(visitor);
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173 | }
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174 | cloneMap = visitor.orig;
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175 | return true;
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176 | }
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177 |
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178 | /**
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179 | * Undoes the command.
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180 | * It can be assumed that all objects are in the same state they were before.
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181 | * It can also be assumed that executeCommand was called exactly once before.
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182 | *
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183 | * This implementation undoes all objects stored by a former call to executeCommand.
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184 | */
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185 | public void undoCommand() {
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186 | for (Entry<OsmPrimitive, PrimitiveData> e : cloneMap.entrySet()) {
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187 | OsmPrimitive primitive = e.getKey();
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188 | if (primitive.getDataSet() != null) {
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189 | e.getKey().load(e.getValue());
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190 | }
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191 | }
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192 | }
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193 |
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194 | /**
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195 | * Called when a layer has been removed to have the command remove itself from
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196 | * any buffer if it is not longer applicable to the dataset (e.g. it was part of
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197 | * the removed layer)
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198 | *
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199 | * @param oldLayer the old layer
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200 | * @return true if this command
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201 | */
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202 | public boolean invalidBecauselayerRemoved(Layer oldLayer) {
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203 | if (!(oldLayer instanceof OsmDataLayer))
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204 | return false;
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205 | return layer == oldLayer;
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206 | }
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207 |
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208 | /**
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209 | * Lets other commands access the original version
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210 | * of the object. Usually for undoing.
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211 | * @param osm The requested OSM object
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212 | * @return The original version of the requested object, if any
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213 | */
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214 | public PrimitiveData getOrig(OsmPrimitive osm) {
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215 | return cloneMap.get(osm);
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216 | }
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217 |
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218 | /**
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219 | * Replies the layer this command is (or was) applied to.
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220 | *
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221 | */
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222 | protected OsmDataLayer getLayer() {
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223 | return layer;
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224 | }
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225 |
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226 | /**
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227 | * Fill in the changed data this command operates on.
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228 | * Add to the lists, don't clear them.
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229 | *
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230 | * @param modified The modified primitives
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231 | * @param deleted The deleted primitives
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232 | * @param added The added primitives
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233 | */
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234 | public abstract void fillModifiedData(Collection<OsmPrimitive> modified,
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235 | Collection<OsmPrimitive> deleted,
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236 | Collection<OsmPrimitive> added);
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237 |
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238 | /**
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239 | * Return the primitives that take part in this command.
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240 | */
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241 | @Override public Collection<? extends OsmPrimitive> getParticipatingPrimitives() {
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242 | return cloneMap.keySet();
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243 | }
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244 |
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245 | /**
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246 | * Check whether user is about to operate on data outside of the download area.
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247 | * Request confirmation if he is.
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248 | *
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249 | * @param operation the operation name which is used for setting some preferences
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250 | * @param dialogTitle the title of the dialog being displayed
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251 | * @param outsideDialogMessage the message text to be displayed when data is outside of the download area
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252 | * @param incompleteDialogMessage the message text to be displayed when data is incomplete
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253 | * @param primitives the primitives to operate on
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254 | * @param ignore {@code null} or a primitive to be ignored
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255 | * @return true, if operating on outlying primitives is OK; false, otherwise
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256 | */
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257 | public static boolean checkAndConfirmOutlyingOperation(String operation,
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258 | String dialogTitle, String outsideDialogMessage, String incompleteDialogMessage,
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259 | Collection<? extends OsmPrimitive> primitives,
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260 | Collection<? extends OsmPrimitive> ignore) {
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261 | boolean outside = false;
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262 | boolean incomplete = false;
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263 | for (OsmPrimitive osm : primitives) {
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264 | if (osm.isIncomplete()) {
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265 | incomplete = true;
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266 | } else if (osm.isOutsideDownloadArea()
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267 | && (ignore == null || !ignore.contains(osm))) {
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268 | outside = true;
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269 | }
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270 | }
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271 | if (outside) {
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272 | JPanel msg = new JPanel(new GridBagLayout());
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273 | msg.add(new JMultilineLabel("<html>" + outsideDialogMessage + "</html>"));
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274 | boolean answer = ConditionalOptionPaneUtil.showConfirmationDialog(
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275 | operation + "_outside_nodes",
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276 | Main.parent,
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277 | msg,
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278 | dialogTitle,
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279 | JOptionPane.YES_NO_OPTION,
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280 | JOptionPane.QUESTION_MESSAGE,
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281 | JOptionPane.YES_OPTION);
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282 | if(!answer)
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283 | return false;
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284 | }
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285 | if (incomplete) {
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286 | JPanel msg = new JPanel(new GridBagLayout());
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287 | msg.add(new JMultilineLabel("<html>" + incompleteDialogMessage + "</html>"));
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288 | boolean answer = ConditionalOptionPaneUtil.showConfirmationDialog(
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289 | operation + "_incomplete",
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290 | Main.parent,
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291 | msg,
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292 | dialogTitle,
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293 | JOptionPane.YES_NO_OPTION,
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294 | JOptionPane.QUESTION_MESSAGE,
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295 | JOptionPane.YES_OPTION);
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296 | if(!answer)
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297 | return false;
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298 | }
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299 | return true;
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300 | }
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301 |
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302 | @Override
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303 | public int hashCode() {
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304 | final int prime = 31;
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305 | int result = 1;
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306 | result = prime * result + ((cloneMap == null) ? 0 : cloneMap.hashCode());
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307 | result = prime * result + ((layer == null) ? 0 : layer.hashCode());
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308 | return result;
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309 | }
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310 |
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311 | @Override
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312 | public boolean equals(Object obj) {
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313 | if (this == obj)
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314 | return true;
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315 | if (obj == null)
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316 | return false;
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317 | if (getClass() != obj.getClass())
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318 | return false;
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319 | Command other = (Command) obj;
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320 | if (cloneMap == null) {
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321 | if (other.cloneMap != null)
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322 | return false;
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323 | } else if (!cloneMap.equals(other.cloneMap))
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324 | return false;
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325 | if (layer == null) {
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326 | if (other.layer != null)
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327 | return false;
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328 | } else if (!layer.equals(other.layer))
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329 | return false;
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330 | return true;
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331 | }
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332 | }
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