001 // License: GPL. For details, see LICENSE file.
002 package org.openstreetmap.josm.actions;
003
004 import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
005 import static org.openstreetmap.josm.tools.I18n.tr;
006
007 import java.awt.event.ActionEvent;
008 import java.awt.event.KeyEvent;
009 import java.util.Collection;
010 import java.util.List;
011
012 import org.openstreetmap.josm.data.osm.DataSet;
013 import org.openstreetmap.josm.data.osm.OsmPrimitive;
014 import org.openstreetmap.josm.data.osm.visitor.MergeSourceBuildingVisitor;
015 import org.openstreetmap.josm.gui.dialogs.LayerListDialog;
016 import org.openstreetmap.josm.gui.layer.Layer;
017 import org.openstreetmap.josm.gui.layer.OsmDataLayer;
018 import org.openstreetmap.josm.gui.util.GuiHelper;
019 import org.openstreetmap.josm.tools.ImageProvider;
020 import org.openstreetmap.josm.tools.Shortcut;
021
022 public class MergeSelectionAction extends AbstractMergeAction {
023 public MergeSelectionAction() {
024 super(tr("Merge selection"), "dialogs/mergedown", tr("Merge the currently selected objects into another layer"),
025 Shortcut.registerShortcut("system:mergeselection", tr("Edit: {0}", tr("Merge selection")),
026 KeyEvent.VK_M, Shortcut.CTRL_SHIFT),
027 true /* register */
028 );
029 putValue("help", ht("/Action/MergeSelection"));
030 }
031
032 public void mergeSelected(DataSet source) {
033 List<Layer> targetLayers = LayerListDialog.getInstance().getModel().getPossibleMergeTargets(getEditLayer());
034 if (targetLayers.isEmpty()) {
035 warnNoTargetLayersForSourceLayer(getEditLayer());
036 return;
037 }
038 Layer targetLayer = askTargetLayer(targetLayers);
039 if (targetLayer == null)
040 return;
041 if (getEditLayer().isUploadDiscouraged() && targetLayer instanceof OsmDataLayer && !((OsmDataLayer)targetLayer).isUploadDiscouraged()
042 && getEditLayer().data.getAllSelected().size() > 1) {
043 if (warnMergingUploadDiscouragedObjects(targetLayer)) {
044 return;
045 }
046 }
047 MergeSourceBuildingVisitor builder = new MergeSourceBuildingVisitor(getEditLayer().data);
048 ((OsmDataLayer)targetLayer).mergeFrom(builder.build());
049 }
050
051 public void actionPerformed(ActionEvent e) {
052 if (getEditLayer() == null || getEditLayer().data.getAllSelected().isEmpty())
053 return;
054 mergeSelected(getEditLayer().data);
055 }
056
057 @Override
058 protected void updateEnabledState() {
059 if (getCurrentDataSet() == null) {
060 setEnabled(false);
061 } else {
062 updateEnabledState(getCurrentDataSet().getAllSelected());
063 }
064 }
065
066 @Override
067 protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
068 setEnabled(selection != null && !selection.isEmpty());
069 }
070
071 /**
072 * returns true if the user wants to cancel, false if they want to continue
073 */
074 public static final boolean warnMergingUploadDiscouragedObjects(Layer targetLayer) {
075 return GuiHelper.warnUser(tr("Merging too many objects with different upload policies"),
076 "<html>" +
077 tr("You are about to merge more than 1 object between layers ''{0}'' and ''{1}''.<br /><br />"+
078 "<b>This is not the recommended way of merging such data</b>.<br />"+
079 "You should instead check and merge each object, <b>one by one</b>.<br /><br />"+
080 "Are you sure you want to continue?", getEditLayer().getName(), targetLayer.getName(), targetLayer.getName())+
081 "</html>",
082 ImageProvider.get("dialogs", "mergedown"), tr("Ignore this hint and merge anyway"));
083 }
084 }