1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.dialogs.layer;
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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.Component;
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7 | import java.awt.event.ActionEvent;
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8 | import java.util.List;
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9 |
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10 | import javax.swing.AbstractAction;
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11 | import javax.swing.JMenuItem;
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12 |
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13 | import org.openstreetmap.josm.Main;
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14 | import org.openstreetmap.josm.gui.dialogs.LayerListDialog.LayerListModel;
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15 | import org.openstreetmap.josm.gui.help.HelpUtil;
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16 | import org.openstreetmap.josm.gui.layer.Layer;
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17 | import org.openstreetmap.josm.gui.layer.Layer.LayerAction;
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18 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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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 | * The action to merge the currently selected layer into another layer.
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23 | */
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24 | public final class MergeAction extends AbstractAction implements IEnabledStateUpdating, LayerAction, Layer.MultiLayerAction {
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25 | private transient Layer layer;
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26 | private transient List<Layer> layers;
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27 | private final LayerListModel model;
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28 |
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29 | /**
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30 | * Constructs a new {@code MergeAction}.
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31 | * @param layer the layer
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32 | * @param model layer list model
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33 | * @throws IllegalArgumentException if {@code layer} is null
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34 | */
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35 | public MergeAction(Layer layer, LayerListModel model) {
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36 | this(layer, null, model);
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37 | CheckParameterUtil.ensureParameterNotNull(layer, "layer");
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38 | }
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39 |
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40 | /**
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41 | * Constructs a new {@code MergeAction}.
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42 | * @param layers the layer list
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43 | * @param model layer list model
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44 | * @throws IllegalArgumentException if {@code layers} is null
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45 | */
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46 | public MergeAction(List<Layer> layers, LayerListModel model) {
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47 | this(null, layers, model);
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48 | CheckParameterUtil.ensureParameterNotNull(layers, "layers");
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49 | }
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50 |
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51 | /**
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52 | * Constructs a new {@code MergeAction}.
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53 | * @param layer the layer (null if layer list if specified)
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54 | * @param layers the layer list (null if a single layer is specified)
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55 | * @param model layer list model
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56 | */
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57 | private MergeAction(Layer layer, List<Layer> layers, LayerListModel model) {
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58 | this.layer = layer;
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59 | this.layers = layers;
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60 | this.model = model;
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61 | putValue(NAME, tr("Merge"));
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62 | putValue(SMALL_ICON, ImageProvider.get("dialogs", "mergedown"));
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63 | putValue(SHORT_DESCRIPTION, tr("Merge this layer into another layer"));
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64 | putValue("help", HelpUtil.ht("/Dialog/LayerList#MergeLayer"));
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65 | updateEnabledState();
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66 | }
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67 |
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68 | @Override
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69 | public void actionPerformed(ActionEvent e) {
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70 | if (layer != null) {
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71 | Main.main.menu.merge.merge(layer);
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72 | } else if (layers != null) {
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73 | Main.main.menu.merge.merge(layers);
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74 | } else {
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75 | if (model.getSelectedLayers().size() == 1) {
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76 | Layer selectedLayer = model.getSelectedLayers().get(0);
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77 | Main.main.menu.merge.merge(selectedLayer);
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78 | } else {
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79 | Main.main.menu.merge.merge(model.getSelectedLayers());
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80 | }
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81 | }
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82 | }
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83 |
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84 | @Override
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85 | public void updateEnabledState() {
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86 | if (layer == null && layers == null) {
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87 | if (model.getSelectedLayers().isEmpty()) {
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88 | setEnabled(false);
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89 | } else if (model.getSelectedLayers().size() > 1) {
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90 | setEnabled(supportLayers(model.getSelectedLayers()));
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91 | } else {
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92 | Layer selectedLayer = model.getSelectedLayers().get(0);
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93 | List<Layer> targets = model.getPossibleMergeTargets(selectedLayer);
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94 | setEnabled(!targets.isEmpty());
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95 | }
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96 | } else if (layer != null) {
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97 | List<Layer> targets = model.getPossibleMergeTargets(layer);
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98 | setEnabled(!targets.isEmpty());
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99 | } else {
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100 | setEnabled(supportLayers(layers));
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101 | }
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102 | }
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103 |
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104 | @Override
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105 | public boolean supportLayers(List<Layer> layers) {
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106 | if (layers.isEmpty()) {
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107 | return false;
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108 | } else {
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109 | final Layer firstLayer = layers.get(0);
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110 | final List<Layer> remainingLayers = layers.subList(1, layers.size());
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111 | return model.getPossibleMergeTargets(firstLayer).containsAll(remainingLayers);
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112 | }
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113 | }
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114 |
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115 | @Override
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116 | public Component createMenuComponent() {
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117 | return new JMenuItem(this);
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118 | }
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119 |
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120 | @Override
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121 | public MergeAction getMultiLayerAction(List<Layer> layers) {
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122 | return new MergeAction(layers, model);
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123 | }
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124 | }
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