// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.actions;
import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
import static org.openstreetmap.josm.tools.I18n.tr;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.gui.dialogs.LayerListDialog;
import org.openstreetmap.josm.gui.layer.Layer;
import org.openstreetmap.josm.gui.layer.OsmDataLayer;
import org.openstreetmap.josm.gui.util.GuiHelper;
import org.openstreetmap.josm.tools.ImageProvider;
import org.openstreetmap.josm.tools.Shortcut;
/**
* Action that merges two or more OSM data layers.
* @since 1890
*/
public class MergeLayerAction extends AbstractMergeAction {
/**
* Constructs a new {@code MergeLayerAction}.
*/
public MergeLayerAction() {
super(tr("Merge layer"), "dialogs/mergedown",
tr("Merge the current layer into another layer"),
Shortcut.registerShortcut("system:merge", tr("Edit: {0}",
tr("Merge")), KeyEvent.VK_M, Shortcut.CTRL),
true, "action/mergelayer", true);
putValue("help", ht("/Action/MergeLayer"));
}
protected void doMerge(List<Layer> targetLayers, final Collection<Layer> sourceLayers) {
final Layer targetLayer = askTargetLayer(targetLayers);
if (targetLayer == null)
return;
Main.worker.submit(new Runnable() {
@Override
public void run() {
boolean layerMerged = false;
for (final Layer sourceLayer: sourceLayers) {
if (sourceLayer != null && sourceLayer != targetLayer) {
if (sourceLayer instanceof OsmDataLayer && targetLayer instanceof OsmDataLayer
&& ((OsmDataLayer)sourceLayer).isUploadDiscouraged() != ((OsmDataLayer)targetLayer).isUploadDiscouraged()) {
if (warnMergingUploadDiscouragedLayers(sourceLayer, targetLayer)) {
break;
}
}
targetLayer.mergeFrom(sourceLayer);
GuiHelper.runInEDTAndWait(new Runnable() {
@Override
public void run() {
Main.main.removeLayer(sourceLayer);
}
});
layerMerged = true;
}
}
if (layerMerged) {
Main.map.mapView.setActiveLayer(targetLayer);
}
}
});
}
/**
* Merges a list of layers together.
* @param sourceLayers The layers to merge
*/
public void merge(List<Layer> sourceLayers) {
doMerge(sourceLayers, sourceLayers);
}
/**
* Merges the given source layer with another one, determined at runtime.
* @param sourceLayer The source layer to merge
*/
public void merge(Layer sourceLayer) {
if (sourceLayer == null)
return;
List<Layer> targetLayers = LayerListDialog.getInstance().getModel().getPossibleMergeTargets(sourceLayer);
if (targetLayers.isEmpty()) {
warnNoTargetLayersForSourceLayer(sourceLayer);
return;
}
doMerge(targetLayers, Collections.singleton(sourceLayer));
}
@Override
public void actionPerformed(ActionEvent e) {
Layer sourceLayer = Main.main.getEditLayer();
if (sourceLayer == null)
return;
merge(sourceLayer);
}
@Override
protected void updateEnabledState() {
GuiHelper.runInEDT(new Runnable() {
@Override
public void run() {
if (getEditLayer() == null) {
setEnabled(false);
return;
}
setEnabled(!LayerListDialog.getInstance().getModel().getPossibleMergeTargets(getEditLayer()).isEmpty());
}
});
}
/**
* Warns about a discouraged merge operation, ask for confirmation.
* @param sourceLayer The source layer
* @param targetLayer The target layer
* @return {@code true} if the user wants to cancel, {@code false} if they want to continue
*/
public static final boolean warnMergingUploadDiscouragedLayers(Layer sourceLayer, Layer targetLayer) {
return GuiHelper.warnUser(tr("Merging layers with different upload policies"),
"<html>" +
tr("You are about to merge data between layers ''{0}'' and ''{1}''.<br /><br />"+
"These layers have different upload policies and should not been merged as it.<br />"+
"Merging them will result to enforce the stricter policy (upload discouraged) to ''{1}''.<br /><br />"+
"<b>This is not the recommended way of merging such data</b>.<br />"+
"You should instead check and merge each object, one by one, by using ''<i>Merge selection</i>''.<br /><br />"+
"Are you sure you want to continue?", sourceLayer.getName(), targetLayer.getName(), targetLayer.getName())+
"</html>",
ImageProvider.get("dialogs", "mergedown"), tr("Ignore this hint and merge anyway"));
}
}