1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.datatransfer.importers;
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3 |
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4 | import java.awt.datatransfer.UnsupportedFlavorException;
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5 | import java.io.IOException;
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6 | import java.util.ArrayList;
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7 | import java.util.Arrays;
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8 | import java.util.Collection;
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9 | import java.util.EnumMap;
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10 | import java.util.List;
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11 | import java.util.Map;
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12 |
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13 | import javax.swing.TransferHandler.TransferSupport;
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14 |
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15 | import org.openstreetmap.josm.Main;
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16 | import org.openstreetmap.josm.command.ChangePropertyCommand;
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17 | import org.openstreetmap.josm.command.Command;
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18 | import org.openstreetmap.josm.data.osm.IPrimitive;
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19 | import org.openstreetmap.josm.data.osm.Node;
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20 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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21 | import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
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22 | import org.openstreetmap.josm.data.osm.Tag;
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23 | import org.openstreetmap.josm.data.osm.TagCollection;
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24 | import org.openstreetmap.josm.data.osm.TagMap;
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25 | import org.openstreetmap.josm.gui.conflict.tags.PasteTagsConflictResolverDialog;
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26 | import org.openstreetmap.josm.gui.datatransfer.data.PrimitiveTagTransferData;
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27 |
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28 | /**
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29 | * This class helps pasting tags form other primitives. It handles resolving conflicts.
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30 | * @author Michael Zangl
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31 | * @since 10737
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32 | */
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33 | public class PrimitiveTagTransferPaster extends AbstractTagPaster {
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34 | /**
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35 | * Create a new {@link PrimitiveTagTransferPaster}
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36 | */
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37 | public PrimitiveTagTransferPaster() {
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38 | super(PrimitiveTagTransferData.FLAVOR);
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39 | }
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40 |
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41 | @Override
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42 | public boolean importTagsOn(TransferSupport support, Collection<? extends OsmPrimitive> selection)
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43 | throws UnsupportedFlavorException, IOException {
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44 | Object o = support.getTransferable().getTransferData(df);
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45 | if (!(o instanceof PrimitiveTagTransferData))
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46 | return false;
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47 | PrimitiveTagTransferData data = (PrimitiveTagTransferData) o;
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48 |
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49 | TagPasteSupport tagPaster = new TagPasteSupport(data, selection);
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50 | List<Command> commands = new ArrayList<>();
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51 | for (Tag tag : tagPaster.execute()) {
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52 | commands.add(new ChangePropertyCommand(selection, tag.getKey(), "".equals(tag.getValue()) ? null : tag.getValue()));
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53 | }
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54 | commitCommands(selection, commands);
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55 | return true;
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56 | }
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57 |
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58 | @Override
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59 | protected Map<String, String> getTags(TransferSupport support) throws UnsupportedFlavorException, IOException {
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60 | PrimitiveTagTransferData data = (PrimitiveTagTransferData) support.getTransferable().getTransferData(df);
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61 |
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62 | TagPasteSupport tagPaster = new TagPasteSupport(data, Arrays.asList(new Node()));
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63 | return new TagMap(tagPaster.execute());
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64 | }
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65 |
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66 | private static class TagPasteSupport {
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67 | private final PrimitiveTagTransferData data;
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68 | private final Collection<? extends IPrimitive> selection;
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69 | private final List<Tag> tags = new ArrayList<>();
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70 |
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71 | /**
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72 | * Constructs a new {@code TagPasteSupport}.
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73 | * @param data source tags to paste
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74 | * @param selection target primitives
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75 | */
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76 | TagPasteSupport(PrimitiveTagTransferData data, Collection<? extends IPrimitive> selection) {
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77 | super();
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78 | this.data = data;
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79 | this.selection = selection;
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80 | }
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81 |
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82 | /**
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83 | * Pastes the tags from a homogeneous source (the selection consisting
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84 | * of one type of {@link OsmPrimitive}s only).
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85 | *
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86 | * Tags from a homogeneous source can be pasted to a heterogeneous target. All target primitives,
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87 | * regardless of their type, receive the same tags.
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88 | */
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89 | protected void pasteFromHomogeneousSource() {
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90 | TagCollection tc = null;
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91 | for (OsmPrimitiveType type : OsmPrimitiveType.dataValues()) {
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92 | TagCollection tc1 = data.getForPrimitives(type);
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93 | if (!tc1.isEmpty()) {
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94 | tc = tc1;
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95 | }
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96 | }
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97 | if (tc == null)
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98 | // no tags found to paste. Abort.
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99 | return;
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100 |
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101 | if (!tc.isApplicableToPrimitive()) {
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102 | PasteTagsConflictResolverDialog dialog = new PasteTagsConflictResolverDialog(Main.parent);
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103 | dialog.populate(tc, data.getStatistics(), getTargetStatistics());
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104 | dialog.setVisible(true);
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105 | if (dialog.isCanceled())
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106 | return;
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107 | buildTags(dialog.getResolution());
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108 | } else {
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109 | // no conflicts in the source tags to resolve. Just apply the tags to the target primitives
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110 | buildTags(tc);
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111 | }
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112 | }
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113 |
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114 | /**
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115 | * Replies true if this a heterogeneous source can be pasted without conflict to targets
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116 | *
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117 | * @return true if this a heterogeneous source can be pasted without conflicts to targets
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118 | */
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119 | protected boolean canPasteFromHeterogeneousSourceWithoutConflict() {
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120 | for (OsmPrimitiveType type : OsmPrimitiveType.dataValues()) {
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121 | if (hasTargetPrimitives(type)) {
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122 | TagCollection tc = data.getForPrimitives(type);
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123 | if (!tc.isEmpty() && !tc.isApplicableToPrimitive())
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124 | return false;
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125 | }
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126 | }
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127 | return true;
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128 | }
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129 |
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130 | /**
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131 | * Pastes the tags in the current selection of the paste buffer to a set of target primitives.
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132 | */
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133 | protected void pasteFromHeterogeneousSource() {
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134 | if (canPasteFromHeterogeneousSourceWithoutConflict()) {
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135 | for (OsmPrimitiveType type : OsmPrimitiveType.dataValues()) {
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136 | if (!data.getForPrimitives(type).isEmpty() && hasTargetPrimitives(type)) {
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137 | buildTags(data.getForPrimitives(type));
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138 | }
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139 | }
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140 | } else {
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141 | PasteTagsConflictResolverDialog dialog = new PasteTagsConflictResolverDialog(Main.parent);
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142 | dialog.populate(
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143 | data.getForPrimitives(OsmPrimitiveType.NODE),
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144 | data.getForPrimitives(OsmPrimitiveType.WAY),
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145 | data.getForPrimitives(OsmPrimitiveType.RELATION),
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146 | data.getStatistics(),
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147 | getTargetStatistics()
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148 | );
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149 | dialog.setVisible(true);
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150 | if (dialog.isCanceled())
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151 | return;
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152 | for (OsmPrimitiveType type : OsmPrimitiveType.dataValues()) {
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153 | if (!data.getForPrimitives(type).isEmpty() && hasTargetPrimitives(type)) {
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154 | buildTags(dialog.getResolution(type));
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155 | }
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156 | }
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157 | }
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158 | }
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159 |
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160 | protected Map<OsmPrimitiveType, Integer> getTargetStatistics() {
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161 | Map<OsmPrimitiveType, Integer> ret = new EnumMap<>(OsmPrimitiveType.class);
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162 | for (OsmPrimitiveType type: OsmPrimitiveType.dataValues()) {
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163 | int count = (int) selection.stream().filter(p -> type == p.getType()).count();
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164 | if (count > 0) {
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165 | ret.put(type, count);
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166 | }
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167 | }
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168 | return ret;
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169 | }
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170 |
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171 | /**
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172 | * Replies true if there is at least one primitive of type <code>type</code>
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173 | * is in the target collection
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174 | *
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175 | * @param type the type to look for
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176 | * @return true if there is at least one primitive of type <code>type</code> in the collection
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177 | * <code>selection</code>
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178 | */
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179 | protected boolean hasTargetPrimitives(OsmPrimitiveType type) {
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180 | return selection.stream().anyMatch(p -> type == p.getType());
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181 | }
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182 |
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183 | protected void buildTags(TagCollection tc) {
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184 | for (String key : tc.getKeys()) {
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185 | tags.add(new Tag(key, tc.getValues(key).iterator().next()));
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186 | }
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187 | }
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188 |
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189 | /**
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190 | * Performs the paste operation.
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191 | * @return list of tags
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192 | */
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193 | public List<Tag> execute() {
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194 | tags.clear();
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195 | if (data.isHeterogeneousSource()) {
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196 | pasteFromHeterogeneousSource();
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197 | } else {
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198 | pasteFromHomogeneousSource();
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199 | }
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200 | return tags;
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201 | }
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202 |
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203 | @Override
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204 | public String toString() {
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205 | return "PasteSupport [data=" + data + ", selection=" + selection + ']';
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206 | }
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207 | }
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208 | }
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