[422] | 1 | //License: GPL. Copyright 2007 by Immanuel Scholz and others
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| 2 | package org.openstreetmap.josm.actions;
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| 3 |
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[2220] | 4 | import static org.openstreetmap.josm.gui.conflict.tags.TagConflictResolutionUtil.combineTigerTags;
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| 5 | import static org.openstreetmap.josm.gui.conflict.tags.TagConflictResolutionUtil.completeTagCollectionForEditing;
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| 6 | import static org.openstreetmap.josm.gui.conflict.tags.TagConflictResolutionUtil.normalizeTagCollectionBeforeEditing;
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[2315] | 7 | import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
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[422] | 8 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 9 |
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| 10 | import java.awt.event.ActionEvent;
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| 11 | import java.awt.event.KeyEvent;
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[582] | 12 | import java.util.ArrayList;
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[422] | 13 | import java.util.Collection;
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[582] | 14 | import java.util.HashSet;
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[2341] | 15 | import java.util.LinkedHashSet;
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[422] | 16 | import java.util.LinkedList;
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[2113] | 17 | import java.util.List;
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[422] | 18 | import java.util.Set;
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| 19 |
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| 20 | import javax.swing.JOptionPane;
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| 21 |
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| 22 | import org.openstreetmap.josm.Main;
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| 23 | import org.openstreetmap.josm.command.ChangeCommand;
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| 24 | import org.openstreetmap.josm.command.Command;
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| 25 | import org.openstreetmap.josm.command.DeleteCommand;
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| 26 | import org.openstreetmap.josm.command.SequenceCommand;
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[582] | 27 | import org.openstreetmap.josm.data.osm.Node;
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[422] | 28 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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[2565] | 29 | import org.openstreetmap.josm.data.osm.RelationToChildReference;
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[2095] | 30 | import org.openstreetmap.josm.data.osm.TagCollection;
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[422] | 31 | import org.openstreetmap.josm.data.osm.Way;
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[2315] | 32 | import org.openstreetmap.josm.gui.DefaultNameFormatter;
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| 33 | import org.openstreetmap.josm.gui.HelpAwareOptionPane;
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| 34 | import org.openstreetmap.josm.gui.HelpAwareOptionPane.ButtonSpec;
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[2095] | 35 | import org.openstreetmap.josm.gui.conflict.tags.CombinePrimitiveResolverDialog;
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| 36 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
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[2842] | 37 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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[2315] | 38 | import org.openstreetmap.josm.tools.ImageProvider;
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[1084] | 39 | import org.openstreetmap.josm.tools.Shortcut;
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[422] | 40 | /**
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[2095] | 41 | * Merges a collection of nodes into one node.
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[2512] | 42 | *
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[422] | 43 | */
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[1820] | 44 | public class MergeNodesAction extends JosmAction {
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[422] | 45 |
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[1169] | 46 | public MergeNodesAction() {
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| 47 | super(tr("Merge Nodes"), "mergenodes", tr("Merge nodes into the oldest one."),
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[1814] | 48 | Shortcut.registerShortcut("tools:mergenodes", tr("Tool: {0}", tr("Merge Nodes")), KeyEvent.VK_M, Shortcut.GROUP_EDIT), true);
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[2323] | 49 | putValue("help", ht("/Action/MergeNodesAction"));
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[1169] | 50 | }
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[422] | 51 |
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[1169] | 52 | public void actionPerformed(ActionEvent event) {
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[1820] | 53 | if (!isEnabled())
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| 54 | return;
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[1814] | 55 | Collection<OsmPrimitive> selection = getCurrentDataSet().getSelected();
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[2341] | 56 | LinkedHashSet<Node> selectedNodes = OsmPrimitive.getFilteredSet(selection, Node.class);
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[1169] | 57 | if (selectedNodes.size() < 2) {
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[2017] | 58 | JOptionPane.showMessageDialog(
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[1847] | 59 | Main.parent,
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| 60 | tr("Please select at least two nodes to merge."),
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| 61 | tr("Warning"),
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| 62 | JOptionPane.WARNING_MESSAGE
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| 63 | );
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[1169] | 64 | return;
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| 65 | }
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[422] | 66 |
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[2095] | 67 | Node targetNode = selectTargetNode(selectedNodes);
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| 68 | Command cmd = mergeNodes(Main.main.getEditLayer(), selectedNodes, targetNode);
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| 69 | if (cmd != null) {
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| 70 | Main.main.undoRedo.add(cmd);
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| 71 | Main.main.getEditLayer().data.setSelected(targetNode);
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| 72 | }
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| 73 | }
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| 74 |
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| 75 | /**
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[2341] | 76 | * Find which node to merge into (i.e. which one will be left)
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[2414] | 77 | * The last selected node will become the target node the remaining
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[2341] | 78 | * nodes are merged to.
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[2512] | 79 | *
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[2095] | 80 | * @param candidates the collection of candidate nodes
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| 81 | * @return the selected target node
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| 82 | */
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[2341] | 83 | public static Node selectTargetNode(LinkedHashSet<Node> candidates) {
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[2095] | 84 | Node targetNode = null;
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[2341] | 85 | for (Node n : candidates) { // pick last one
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| 86 | targetNode = n;
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[1169] | 87 | }
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[2095] | 88 | return targetNode;
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[1169] | 89 | }
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[422] | 90 |
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[1169] | 91 | /**
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[2113] | 92 | * Fixes the parent ways referring to one of the nodes.
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[2512] | 93 | *
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[2202] | 94 | * Replies null, if the ways could not be fixed, i.e. because a way would have to be deleted
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[2113] | 95 | * which is referred to by a relation.
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[2512] | 96 | *
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[2113] | 97 | * @param nodesToDelete the collection of nodes to be deleted
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| 98 | * @param targetNode the target node the other nodes are merged to
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[2202] | 99 | * @return a list of commands; null, if the ways could not be fixed
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[2113] | 100 | */
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[2565] | 101 | protected static List<Command> fixParentWays(Collection<OsmPrimitive> nodesToDelete, Node targetNode) {
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[2113] | 102 | List<Command> cmds = new ArrayList<Command>();
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| 103 | Set<Way> waysToDelete = new HashSet<Way>();
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| 104 |
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[2565] | 105 | for (Way w: OsmPrimitive.getFilteredList(OsmPrimitive.getReferrer(nodesToDelete), Way.class)) {
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[2113] | 106 | ArrayList<Node> newNodes = new ArrayList<Node>(w.getNodesCount());
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| 107 | for (Node n: w.getNodes()) {
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| 108 | if (! nodesToDelete.contains(n) && n != targetNode) {
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| 109 | newNodes.add(n);
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| 110 | } else if (newNodes.isEmpty()) {
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| 111 | newNodes.add(targetNode);
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| 112 | } else if (newNodes.get(newNodes.size()-1) != targetNode) {
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| 113 | // make sure we collapse a sequence of deleted nodes
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| 114 | // to exactly one occurrence of the merged target node
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| 115 | //
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| 116 | newNodes.add(targetNode);
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| 117 | } else {
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| 118 | // drop the node
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| 119 | }
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| 120 | }
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| 121 | if (newNodes.size() < 2) {
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[2565] | 122 | if (w.getReferrers().isEmpty()) {
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[2113] | 123 | waysToDelete.add(w);
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| 124 | } else {
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[2315] | 125 | ButtonSpec[] options = new ButtonSpec[] {
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| 126 | new ButtonSpec(
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| 127 | tr("Abort Merging"),
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| 128 | ImageProvider.get("cancel"),
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| 129 | tr("Click to abort merging nodes"),
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| 130 | null /* no special help topic */
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| 131 | )
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| 132 | };
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| 133 | HelpAwareOptionPane.showOptionDialog(
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[2113] | 134 | Main.parent,
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[2315] | 135 | tr(
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| 136 | "Cannot merge nodes: Would have to delete way ''{0}'' which is still used.",
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| 137 | w.getDisplayName(DefaultNameFormatter.getInstance())
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| 138 | ),
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[2113] | 139 | tr("Warning"),
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[2315] | 140 | JOptionPane.WARNING_MESSAGE,
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| 141 | null, /* no icon */
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| 142 | options,
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| 143 | options[0],
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| 144 | ht("/Action/MergeNodes#WaysToDeleteStillInUse")
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[2113] | 145 | );
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| 146 | return null;
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| 147 | }
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[2565] | 148 | } else if(newNodes.size() < 2 && w.getReferrers().isEmpty()) {
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[2113] | 149 | waysToDelete.add(w);
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| 150 | } else {
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| 151 | Way newWay = new Way(w);
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| 152 | newWay.setNodes(newNodes);
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| 153 | cmds.add(new ChangeCommand(w, newWay));
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| 154 | }
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| 155 | }
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[2333] | 156 | if (!waysToDelete.isEmpty()) {
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| 157 | cmds.add(new DeleteCommand(waysToDelete));
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| 158 | }
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[2113] | 159 | return cmds;
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| 160 | }
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| 161 |
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| 162 | /**
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[2220] | 163 | * Merges the nodes in <code>nodes</code> onto one of the nodes. Uses the dataset
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[2565] | 164 | * managed by <code>layer</code> as reference.
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[2095] | 165 | *
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| 166 | * @param layer layer the reference data layer. Must not be null.
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| 167 | * @param nodes the collection of nodes. Ignored if null.
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| 168 | * @param targetNode the target node the collection of nodes is merged to. Must not be null.
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| 169 | * @throw IllegalArgumentException thrown if layer is null
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| 170 | */
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[2565] | 171 | public static Command mergeNodes(OsmDataLayer layer,Collection<Node> nodes, Node targetNode) {
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[2842] | 172 | CheckParameterUtil.ensureParameterNotNull(layer, "layer");
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| 173 | CheckParameterUtil.ensureParameterNotNull(targetNode, "targetNode");
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[2095] | 174 | if (nodes == null)
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| 175 | return null;
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[422] | 176 |
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[2565] | 177 | Set<RelationToChildReference> relationToNodeReferences = RelationToChildReference.getRelationToChildReferences(nodes);
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| 178 |
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[2095] | 179 | // build the tag collection
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| 180 | //
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| 181 | TagCollection nodeTags = TagCollection.unionOfAllPrimitives(nodes);
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[2202] | 182 | combineTigerTags(nodeTags);
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[2220] | 183 | normalizeTagCollectionBeforeEditing(nodeTags, nodes);
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[2095] | 184 | TagCollection nodeTagsToEdit = new TagCollection(nodeTags);
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| 185 | completeTagCollectionForEditing(nodeTagsToEdit);
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[422] | 186 |
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[2095] | 187 | // launch a conflict resolution dialog, if necessary
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| 188 | //
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| 189 | CombinePrimitiveResolverDialog dialog = CombinePrimitiveResolverDialog.getInstance();
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[2220] | 190 | dialog.getTagConflictResolverModel().populate(nodeTagsToEdit, nodeTags.getKeysWithMultipleValues());
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[2095] | 191 | dialog.getRelationMemberConflictResolverModel().populate(relationToNodeReferences);
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| 192 | dialog.setTargetPrimitive(targetNode);
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| 193 | dialog.prepareDefaultDecisions();
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[2220] | 194 | // conflict resolution is necessary if there are conflicts in the merged tags
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| 195 | // or if at least one of the merged nodes is referred to by a relation
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| 196 | //
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[2095] | 197 | if (! nodeTags.isApplicableToPrimitive() || relationToNodeReferences.size() > 1) {
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| 198 | dialog.setVisible(true);
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| 199 | if (dialog.isCancelled())
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[1169] | 200 | return null;
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| 201 | }
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| 202 | LinkedList<Command> cmds = new LinkedList<Command>();
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[422] | 203 |
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[2095] | 204 | // the nodes we will have to delete
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| 205 | //
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| 206 | Collection<OsmPrimitive> nodesToDelete = new HashSet<OsmPrimitive>(nodes);
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| 207 | nodesToDelete.remove(targetNode);
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[2064] | 208 |
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[2202] | 209 | // fix the ways referring to at least one of the merged nodes
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[2095] | 210 | //
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| 211 | Collection<Way> waysToDelete= new HashSet<Way>();
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[2113] | 212 | List<Command> wayFixCommands = fixParentWays(
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| 213 | nodesToDelete,
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| 214 | targetNode
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| 215 | );
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| 216 | if (wayFixCommands == null)
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| 217 | return null;
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[2220] | 218 | cmds.addAll(wayFixCommands);
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[422] | 219 |
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[2095] | 220 | // build the commands
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| 221 | //
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| 222 | if (!nodesToDelete.isEmpty()) {
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| 223 | cmds.add(new DeleteCommand(nodesToDelete));
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[1814] | 224 | }
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[2095] | 225 | if (!waysToDelete.isEmpty()) {
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| 226 | cmds.add(new DeleteCommand(waysToDelete));
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[1169] | 227 | }
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[2095] | 228 | cmds.addAll(dialog.buildResolutionCommands());
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| 229 | Command cmd = new SequenceCommand(tr("Merge {0} nodes", nodes.size()), cmds);
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| 230 | return cmd;
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[1169] | 231 | }
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[422] | 232 |
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[1820] | 233 | @Override
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[2256] | 234 | protected void updateEnabledState() {
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| 235 | if (getCurrentDataSet() == null) {
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[1820] | 236 | setEnabled(false);
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[2256] | 237 | } else {
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| 238 | updateEnabledState(getCurrentDataSet().getSelected());
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| 239 | }
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| 240 | }
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| 241 |
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| 242 | @Override
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| 243 | protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
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| 244 | if (selection == null || selection.isEmpty()) {
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| 245 | setEnabled(false);
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[1820] | 246 | return;
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| 247 | }
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[1169] | 248 | boolean ok = true;
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[2256] | 249 | if (selection.size() < 2) {
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[1169] | 250 | setEnabled(false);
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| 251 | return;
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| 252 | }
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[2256] | 253 | for (OsmPrimitive osm : selection) {
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[1169] | 254 | if (!(osm instanceof Node)) {
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| 255 | ok = false;
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| 256 | break;
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| 257 | }
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| 258 | }
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| 259 | setEnabled(ok);
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| 260 | }
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[422] | 261 | }
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