Add option to toggle layer read-only status to popup menu

Author: Woazboat

src/org/openstreetmap/josm/actions/ToggleEditLockLayerAction.java

@@ -0,0 +1,66 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.actions;
+
+import static org.openstreetmap.josm.tools.I18n.tr;
+
+import java.awt.Component;
+import java.awt.event.ActionEvent;
+import java.util.List;
+
+import javax.swing.AbstractAction;
+import javax.swing.JCheckBoxMenuItem;
+
+import org.openstreetmap.josm.data.osm.Lockable;
+import org.openstreetmap.josm.gui.dialogs.LayerListDialog;
+import org.openstreetmap.josm.gui.layer.AbstractModifiableLayer;
+import org.openstreetmap.josm.gui.layer.Layer;
+import org.openstreetmap.josm.gui.layer.Layer.LayerAction;
+import org.openstreetmap.josm.tools.ImageProvider;
+
+/**
+ * An action enabling/disabling the {@linkplain AbstractModifiableLayer#lock() read-only flag}
+ * of the layer specified in the constructor.
+ * 
+ * @since XXX
+ */
+public class ToggleEditLockLayerAction extends AbstractAction implements LayerAction {
+
+    private final AbstractModifiableLayer layer;
+
+    /**
+     * Construct a new {@code ToggleEditLockLayerAction}
+     * @param layer the layer for which to toggle the {@linkplain AbstractModifiableLayer#lock() read-only flag}
+     * 
+     * @since XXX
+     */
+    public ToggleEditLockLayerAction(AbstractModifiableLayer layer) {
+        super(tr("Prevent modification"));
+        putValue(SHORT_DESCRIPTION, tr("Prevent/allow changes being made in this layer"));
+        new ImageProvider("lock").getResource().attachImageIcon(this, true);
+        this.layer = layer;
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        if (layer.isLocked()) {
+            layer.unlock();
+        } else {
+            layer.lock();
+        }
+
+        layer.invalidate();
+        LayerListDialog.getInstance().repaint();
+    }
+
+    @Override
+    public Component createMenuComponent() {
+        JCheckBoxMenuItem item = new JCheckBoxMenuItem(this);
+        item.setSelected(layer.isLocked());
+        return item;
+    }
+
+    @Override
+    public boolean supportLayers(List<Layer> layers) {
+        return layers.size() == 1 && layers.get(0) instanceof Lockable;
+    }
+}

src/org/openstreetmap/josm/actions/ToggleUploadDiscouragedLayerAction.java

@@ -31,6 +31,7 @@ public class ToggleUploadDiscouragedLayerAction extends AbstractAction implement
      */
     public ToggleUploadDiscouragedLayerAction(OsmDataLayer layer) {
         super(tr("Discourage upload"));
+        putValue(SHORT_DESCRIPTION, tr("Allow/disallow upload of changes made in this layer"));
         new ImageProvider("no_upload").getResource().attachImageIcon(this, true);
         this.layer = layer;
         setEnabled(layer.isUploadable());

src/org/openstreetmap/josm/gui/layer/OsmDataLayer.java

@@ -52,6 +52,7 @@
 import org.openstreetmap.josm.actions.AutoScaleAction;
 import org.openstreetmap.josm.actions.ExpertToggleAction;
 import org.openstreetmap.josm.actions.RenameLayerAction;
+import org.openstreetmap.josm.actions.ToggleEditLockLayerAction;
 import org.openstreetmap.josm.actions.ToggleUploadDiscouragedLayerAction;
 import org.openstreetmap.josm.data.APIDataSet;
 import org.openstreetmap.josm.data.Bounds;
@@ -743,6 +744,7 @@ public Action[] getMenuEntries() {
                 new RenameLayerAction(getAssociatedFile(), this)));
         if (ExpertToggleAction.isExpert()) {
             actions.add(new ToggleUploadDiscouragedLayerAction(this));
+            actions.add(new ToggleEditLockLayerAction(this));
         }
         actions.addAll(Arrays.asList(
                 new ConsistencyTestAction(),