| 1 | //License: GPL. Copyright 2007 by Immanuel Scholz and others |
| 2 | package org.openstreetmap.josm.actions; |
| 3 | |
| 4 | import static org.openstreetmap.josm.gui.help.HelpUtil.ht; |
| 5 | import static org.openstreetmap.josm.tools.I18n.tr; |
| 6 | import static org.openstreetmap.josm.tools.I18n.trn; |
| 7 | |
| 8 | import java.awt.event.ActionEvent; |
| 9 | import java.awt.event.KeyEvent; |
| 10 | import java.util.ArrayList; |
| 11 | import java.util.Collection; |
| 12 | import java.util.Collections; |
| 13 | import java.util.HashSet; |
| 14 | import java.util.Iterator; |
| 15 | import java.util.List; |
| 16 | |
| 17 | import javax.swing.JOptionPane; |
| 18 | |
| 19 | import org.openstreetmap.josm.Main; |
| 20 | import org.openstreetmap.josm.command.ChangeNodesCommand; |
| 21 | import org.openstreetmap.josm.command.Command; |
| 22 | import org.openstreetmap.josm.data.osm.Node; |
| 23 | import org.openstreetmap.josm.data.osm.OsmPrimitive; |
| 24 | import org.openstreetmap.josm.data.osm.Way; |
| 25 | import org.openstreetmap.josm.tools.Shortcut; |
| 26 | |
| 27 | public class UnJoinNodeWayAction extends JosmAction { |
| 28 | public UnJoinNodeWayAction() { |
| 29 | super(tr("Disconnect Node from Way"), "unjoinnodeway", |
| 30 | tr("Disconnect nodes from a way they currently belong to"), |
| 31 | Shortcut.registerShortcut("tools:unjoinnodeway", |
| 32 | tr("Tool: {0}", tr("Disconnect Node from Way")), KeyEvent.VK_J, Shortcut.ALT), true); |
| 33 | putValue("help", ht("/Action/UnJoinNodeWay")); |
| 34 | } |
| 35 | |
| 36 | @Override |
| 37 | public void actionPerformed(ActionEvent e) { |
| 38 | |
| 39 | Collection<OsmPrimitive> selection = getCurrentDataSet().getSelected(); |
| 40 | |
| 41 | List<Node> selectedNodes = OsmPrimitive.getFilteredList(selection, Node.class); |
| 42 | List<Way> selectedWays = OsmPrimitive.getFilteredList(selection, Way.class); |
| 43 | List<Way> applicableWays = getApplicableWays(selectedWays, selectedNodes); |
| 44 | |
| 45 | if (applicableWays == null) { |
| 46 | JOptionPane.showMessageDialog( |
| 47 | Main.parent, |
| 48 | tr("Select at least a node to be disconnected."), |
| 49 | tr("Warning"), |
| 50 | JOptionPane.WARNING_MESSAGE); |
| 51 | return; |
| 52 | } else if (applicableWays.isEmpty()) { |
| 53 | JOptionPane.showMessageDialog(Main.parent, |
| 54 | tr("The selected nodes do not share the same way."), |
| 55 | tr("Warning"), |
| 56 | JOptionPane.WARNING_MESSAGE); |
| 57 | return; |
| 58 | } else if (applicableWays.size() > 1) { |
| 59 | JOptionPane.showMessageDialog(Main.parent, |
| 60 | trn("There is more than one way using the node you selected. Please select the way also.", |
| 61 | "There is more than one way using the nodes you selected. Please select the way also.", |
| 62 | selectedNodes.size()), |
| 63 | tr("Warning"), |
| 64 | JOptionPane.WARNING_MESSAGE); |
| 65 | return; |
| 66 | } else if (applicableWays.get(0).getRealNodesCount() < selectedNodes.size() + 2) { |
| 67 | // there is only one affected way, but removing the selected nodes would only leave it |
| 68 | // with less than 2 nodes |
| 69 | JOptionPane.showMessageDialog(Main.parent, |
| 70 | trn("The affected way would disappear after removing the selected node.", |
| 71 | "The affected way would disappear after removing the selected nodes.", |
| 72 | selectedNodes.size()), |
| 73 | tr("Warning"), |
| 74 | JOptionPane.WARNING_MESSAGE); |
| 75 | return; |
| 76 | } |
| 77 | |
| 78 | // Finally, applicableWays contains only one perfect way |
| 79 | Way selectedWay = applicableWays.get(0); |
| 80 | List<Node> otherNodes = selectedWay.getNodes(); |
| 81 | otherNodes.removeAll(selectedNodes); |
| 82 | Main.main.undoRedo.add(new ChangeNodesCommand(selectedWay, otherNodes)); |
| 83 | Main.map.repaint(); |
| 84 | } |
| 85 | |
| 86 | // shamefully copied over from SplitWayAction |
| 87 | private List<Way> getApplicableWays(List<Way> selectedWays, List<Node> selectedNodes) { |
| 88 | if (selectedNodes.isEmpty()) |
| 89 | return null; |
| 90 | |
| 91 | // Special case - one of the selected ways touches (not cross) way that we want to split |
| 92 | if (selectedNodes.size() == 1) { |
| 93 | Node n = selectedNodes.get(0); |
| 94 | List<Way> referedWays = OsmPrimitive.getFilteredList(n.getReferrers(), Way.class); |
| 95 | Way inTheMiddle = null; |
| 96 | boolean foundSelected = false; |
| 97 | for (Way w: referedWays) { |
| 98 | if (selectedWays.contains(w)) { |
| 99 | foundSelected = true; |
| 100 | } |
| 101 | if (w.getNode(0) != n && w.getNode(w.getNodesCount() - 1) != n) { |
| 102 | if (inTheMiddle == null) { |
| 103 | inTheMiddle = w; |
| 104 | } else { |
| 105 | inTheMiddle = null; |
| 106 | break; |
| 107 | } |
| 108 | } |
| 109 | } |
| 110 | if (foundSelected && inTheMiddle != null) |
| 111 | return Collections.singletonList(inTheMiddle); |
| 112 | } |
| 113 | |
| 114 | // List of ways shared by all nodes |
| 115 | List<Way> result = new ArrayList<Way>(OsmPrimitive.getFilteredList(selectedNodes.get(0).getReferrers(), Way.class)); |
| 116 | for (int i=1; i<selectedNodes.size(); i++) { |
| 117 | List<OsmPrimitive> ref = selectedNodes.get(i).getReferrers(); |
| 118 | for (Iterator<Way> it = result.iterator(); it.hasNext(); ) { |
| 119 | if (!ref.contains(it.next())) { |
| 120 | it.remove(); |
| 121 | } |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | // Remove broken ways |
| 126 | for (Iterator<Way> it = result.iterator(); it.hasNext(); ) { |
| 127 | if (it.next().getNodesCount() <= 2) { |
| 128 | it.remove(); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | if (selectedWays.isEmpty()) |
| 133 | return result; |
| 134 | else { |
| 135 | // Return only selected ways |
| 136 | for (Iterator<Way> it = result.iterator(); it.hasNext(); ) { |
| 137 | if (!selectedWays.contains(it.next())) { |
| 138 | it.remove(); |
| 139 | } |
| 140 | } |
| 141 | return result; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | @Override |
| 146 | protected void updateEnabledState() { |
| 147 | if (getCurrentDataSet() == null) { |
| 148 | setEnabled(false); |
| 149 | } else { |
| 150 | updateEnabledState(getCurrentDataSet().getSelected()); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | @Override |
| 155 | protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) { |
| 156 | setEnabled(selection != null && !selection.isEmpty()); |
| 157 | } |
| 158 | } |