1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.dialogs.relation;
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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.datatransfer.Transferable;
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7 | import java.awt.datatransfer.UnsupportedFlavorException;
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8 | import java.io.IOException;
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9 | import java.util.ArrayList;
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10 | import java.util.Collection;
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11 |
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12 | import javax.swing.JComponent;
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13 | import javax.swing.JTable;
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14 | import javax.swing.TransferHandler;
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15 |
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16 | import org.openstreetmap.josm.Main;
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17 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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18 | import org.openstreetmap.josm.data.osm.PrimitiveData;
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19 | import org.openstreetmap.josm.data.osm.PrimitiveId;
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20 | import org.openstreetmap.josm.data.osm.RelationMember;
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21 | import org.openstreetmap.josm.data.osm.RelationMemberData;
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22 | import org.openstreetmap.josm.gui.datatransfer.RelationMemberTransferable;
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23 | import org.openstreetmap.josm.gui.datatransfer.data.PrimitiveTransferData;
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24 |
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25 | /**
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26 | * A transfer handler that helps with importing / exporting members for relations.
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27 | * @author Michael Zangl
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28 | * @since 10604
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29 | */
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30 | public class MemberTransferHandler extends TransferHandler {
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31 |
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32 | @Override
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33 | public int getSourceActions(JComponent c) {
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34 | return COPY_OR_MOVE;
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35 | }
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36 |
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37 | @Override
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38 | protected Transferable createTransferable(JComponent c) {
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39 | final MemberTable source = (MemberTable) c;
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40 | return new RelationMemberTransferable(source.getMemberTableModel().getSelectedMembers());
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41 | }
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42 |
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43 | @Override
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44 | public boolean canImport(TransferSupport support) {
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45 | if (support.isDrop()) {
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46 | support.setShowDropLocation(true);
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47 | }
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48 | return support.isDataFlavorSupported(RelationMemberTransferable.RELATION_MEMBER_DATA)
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49 | || support.isDataFlavorSupported(PrimitiveTransferData.DATA_FLAVOR);
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50 | }
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51 |
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52 | @Override
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53 | public boolean importData(TransferSupport support) {
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54 | MemberTable destination = (MemberTable) support.getComponent();
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55 | int insertRow = computeInsertionRow(support, destination);
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56 |
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57 | return importDataAt(support, destination, insertRow);
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58 | }
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59 |
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60 | private static int computeInsertionRow(TransferSupport support, MemberTable destination) {
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61 | final int insertRow;
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62 | if (support.isDrop()) {
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63 | DropLocation dl = support.getDropLocation();
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64 | if (dl instanceof JTable.DropLocation) {
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65 | insertRow = ((JTable.DropLocation) dl).getRow();
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66 | } else {
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67 | insertRow = 0;
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68 | }
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69 | } else {
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70 | int selection = destination.getSelectedRow();
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71 | if (selection < 0) {
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72 | // no selection, add at the end.
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73 | insertRow = destination.getRowCount();
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74 | } else {
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75 | insertRow = selection;
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76 | }
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77 | }
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78 | return insertRow;
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79 | }
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80 |
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81 | private boolean importDataAt(TransferSupport support, MemberTable destination, int insertRow) {
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82 | try {
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83 | if (support.isDataFlavorSupported(RelationMemberTransferable.RELATION_MEMBER_DATA)) {
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84 | importRelationMemberData(support, destination, insertRow);
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85 | return true;
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86 | } else if (support.isDataFlavorSupported(PrimitiveTransferData.DATA_FLAVOR)) {
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87 | importPrimitiveData(support, destination, insertRow);
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88 | return true;
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89 | } else {
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90 | return false;
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91 | }
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92 | } catch (IOException | UnsupportedFlavorException e) {
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93 | Main.warn(e);
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94 | return false;
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95 | }
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96 | }
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97 |
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98 | protected void importRelationMemberData(TransferSupport support, final MemberTable destination, int insertRow)
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99 | throws UnsupportedFlavorException, IOException {
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100 | final RelationMemberTransferable.Data memberData = (RelationMemberTransferable.Data)
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101 | support.getTransferable().getTransferData(RelationMemberTransferable.RELATION_MEMBER_DATA);
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102 | importData(destination, insertRow, memberData.getRelationMemberData(), new AbstractRelationMemberConverter<RelationMemberData>() {
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103 | @Override
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104 | protected RelationMember getMember(MemberTable destination, RelationMemberData data, OsmPrimitive p) {
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105 | return new RelationMember(data.getRole(), p);
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106 | }
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107 | });
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108 | }
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109 |
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110 | protected void importPrimitiveData(TransferSupport support, final MemberTable destination, int insertRow)
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111 | throws UnsupportedFlavorException, IOException {
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112 | final PrimitiveTransferData data = (PrimitiveTransferData)
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113 | support.getTransferable().getTransferData(PrimitiveTransferData.DATA_FLAVOR);
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114 | importData(destination, insertRow, data.getDirectlyAdded(), new AbstractRelationMemberConverter<PrimitiveData>() {
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115 | @Override
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116 | protected RelationMember getMember(MemberTable destination, PrimitiveData data, OsmPrimitive p) {
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117 | return destination.getMemberTableModel().getRelationMemberForPrimitive(p);
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118 | }
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119 | });
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120 | }
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121 |
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122 | protected <T extends PrimitiveId> void importData(MemberTable destination, int insertRow,
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123 | Collection<T> memberData, AbstractRelationMemberConverter<T> toMemberFunction) {
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124 | final Collection<RelationMember> membersToAdd = new ArrayList<>(memberData.size());
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125 | for (T data : memberData) {
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126 | final RelationMember member = toMemberFunction.importPrimitive(destination, data);
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127 | if (member != null) {
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128 | membersToAdd.add(member);
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129 | }
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130 | }
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131 | destination.getMemberTableModel().addMembersAtIndexKeepingOldSelection(membersToAdd, insertRow);
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132 | }
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133 |
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134 | @Override
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135 | protected void exportDone(JComponent sourceComponent, Transferable data, int action) {
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136 | if (action != MOVE) {
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137 | return;
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138 | }
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139 | final MemberTable source = (MemberTable) sourceComponent;
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140 | final MemberTableModel model = source.getMemberTableModel();
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141 | model.remove(source.getSelectedRows());
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142 | model.selectionChanged(null);
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143 | }
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144 |
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145 | private abstract static class AbstractRelationMemberConverter<T extends PrimitiveId> {
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146 | protected RelationMember importPrimitive(MemberTable destination, T data) {
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147 | final OsmPrimitive p = destination.getLayer().data.getPrimitiveById(data);
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148 | if (p == null) {
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149 | Main.warn(tr("Cannot add {0} since it is not part of dataset", data));
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150 | return null;
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151 | } else {
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152 | return getMember(destination, data, p);
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153 | }
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154 | }
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155 |
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156 | protected abstract RelationMember getMember(MemberTable destination, T data, OsmPrimitive p);
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157 | }
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158 | }
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