1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.actions;
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3 |
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4 | import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
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5 | import static org.openstreetmap.josm.tools.I18n.tr;
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6 |
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7 | import java.awt.event.ActionEvent;
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8 | import java.awt.event.KeyEvent;
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9 | import java.util.Collection;
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10 | import java.util.Collections;
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11 | import java.util.HashSet;
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12 | import java.util.Set;
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13 |
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14 | import org.openstreetmap.josm.data.osm.IPrimitive;
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15 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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16 | import org.openstreetmap.josm.tools.Shortcut;
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17 | import org.openstreetmap.josm.tools.Utils;
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18 |
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19 | /**
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20 | * Select child objects (way nodes and relation members) that are shared by all objects in the current selection.
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21 | * @since 18814
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22 | */
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23 | public class SelectSharedChildObjectsAction extends JosmAction {
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24 |
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25 | /**
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26 | * Create a new SelectSharedChildObjectsAction
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27 | */
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28 | public SelectSharedChildObjectsAction() {
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29 | super(tr("Select shared child objects"),
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30 | "select_shared_children",
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31 | tr("Select child objects (way nodes and relation members) that are shared by all objects in the current selection"),
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32 | Shortcut.registerShortcut("selection:sharedchildobjects",
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33 | tr("Selection: {0}", tr("Shared Child Objects")),
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34 | KeyEvent.CHAR_UNDEFINED, Shortcut.NONE),
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35 | true);
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36 | setHelpId(ht("/Action/SelectSharedChildObjectsAction"));
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37 | }
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38 |
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39 | @Override
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40 | public void actionPerformed(ActionEvent e) {
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41 | Collection<? extends IPrimitive> selection = getLayerManager().getActiveData().getSelected();
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42 | Set<? extends IPrimitive> shared = getSharedChildren(selection);
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43 | getLayerManager().getActiveData().setSelected(shared);
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44 | }
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45 |
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46 | @Override
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47 | protected void updateEnabledState() {
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48 | updateEnabledStateOnCurrentSelection(true);
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49 | }
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50 |
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51 | @Override
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52 | protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
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53 | setEnabled(!Utils.isEmpty(selection));
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54 | }
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55 |
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56 | /**
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57 | * Get the shared children for a selection
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58 | * @param selection The selection to get shared children for
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59 | * @return The shared children
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60 | */
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61 | private static Set<? extends IPrimitive> getSharedChildren(Collection<? extends IPrimitive> selection) {
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62 | Set<IPrimitive> sharedChildObjects = new HashSet<>(selection.stream()
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63 | .findAny().map(IPrimitive::getChildren).orElse(Collections.emptyList()));
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64 |
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65 | for (IPrimitive p : selection) {
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66 | if (sharedChildObjects.isEmpty())
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67 | break;
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68 |
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69 | sharedChildObjects.retainAll(p.getChildren());
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70 | }
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71 |
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72 | return sharedChildObjects;
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73 | }
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74 | }
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