001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.actions; 003 004import static org.openstreetmap.josm.gui.help.HelpUtil.ht; 005import static org.openstreetmap.josm.tools.I18n.tr; 006 007import java.awt.event.ActionEvent; 008import java.awt.event.KeyEvent; 009import java.util.Collection; 010import java.util.List; 011 012import org.openstreetmap.josm.data.osm.OsmPrimitive; 013import org.openstreetmap.josm.data.osm.visitor.MergeSourceBuildingVisitor; 014import org.openstreetmap.josm.gui.dialogs.LayerListDialog; 015import org.openstreetmap.josm.gui.layer.Layer; 016import org.openstreetmap.josm.gui.layer.OsmDataLayer; 017import org.openstreetmap.josm.gui.util.GuiHelper; 018import org.openstreetmap.josm.tools.ImageProvider; 019import org.openstreetmap.josm.tools.Shortcut; 020 021/** 022 * Merge the currently selected objects into another layer. 023 * @since 1890 024 */ 025public class MergeSelectionAction extends AbstractMergeAction { 026 027 /** 028 * Constructs a new {@code MergeSelectionAction}. 029 */ 030 public MergeSelectionAction() { 031 super(tr("Merge selection"), "dialogs/mergedown", tr("Merge the currently selected objects into another layer"), 032 Shortcut.registerShortcut("system:mergeselection", tr("Edit: {0}", tr("Merge selection")), 033 KeyEvent.VK_M, Shortcut.CTRL_SHIFT), 034 true /* register */ 035 ); 036 putValue("help", ht("/Action/MergeSelection")); 037 } 038 039 /** 040 * Merge the currently selected objects into another layer. 041 */ 042 public void mergeSelected() { 043 OsmDataLayer editLayer = getLayerManager().getEditLayer(); 044 List<Layer> targetLayers = LayerListDialog.getInstance().getModel().getPossibleMergeTargets(editLayer); 045 if (targetLayers.isEmpty()) { 046 warnNoTargetLayersForSourceLayer(editLayer); 047 return; 048 } 049 Layer targetLayer = askTargetLayer(targetLayers); 050 if (targetLayer == null) 051 return; 052 if (editLayer.isUploadDiscouraged() && targetLayer instanceof OsmDataLayer 053 && !((OsmDataLayer) targetLayer).isUploadDiscouraged() 054 && editLayer.data.getAllSelected().size() > 1 055 && warnMergingUploadDiscouragedObjects(targetLayer)) { 056 return; 057 } 058 MergeSourceBuildingVisitor builder = new MergeSourceBuildingVisitor(editLayer.data); 059 ((OsmDataLayer) targetLayer).mergeFrom(builder.build()); 060 } 061 062 @Override 063 public void actionPerformed(ActionEvent e) { 064 OsmDataLayer editLayer = getLayerManager().getEditLayer(); 065 if (editLayer == null || editLayer.data.selectionEmpty()) 066 return; 067 mergeSelected(); 068 } 069 070 @Override 071 protected void updateEnabledState() { 072 updateEnabledStateOnCurrentSelection(); 073 } 074 075 @Override 076 protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) { 077 setEnabled(selection != null && !selection.isEmpty()); 078 } 079 080 /** 081 * Warns the user about merging too many objects with different upload policies. 082 * @param targetLayer Target layer 083 * @return true if the user wants to cancel, false if they want to continue 084 */ 085 public final boolean warnMergingUploadDiscouragedObjects(Layer targetLayer) { 086 return GuiHelper.warnUser(tr("Merging too many objects with different upload policies"), 087 "<html>" + 088 tr("You are about to merge more than 1 object between layers ''{0}'' and ''{1}''.<br /><br />"+ 089 "<b>This is not the recommended way of merging such data</b>.<br />"+ 090 "You should instead check and merge each object, <b>one by one</b>.<br /><br />"+ 091 "Are you sure you want to continue?", 092 getLayerManager().getEditLayer().getName(), targetLayer.getName(), targetLayer.getName())+ 093 "</html>", 094 ImageProvider.get("dialogs", "mergedown"), tr("Ignore this hint and merge anyway")); 095 } 096}