[GEF] Switch to LayerConstants.HANDLE_LAYER

This constant is identical to the one defined by the IEditPartViewer. No
need to keep two fields that serve the same purpose.

Author: ptziegler

org.eclipse.wb.core/src-gef/org/eclipse/wb/gef/core/IEditPartViewer.java

@@ -44,11 +44,6 @@ public interface IEditPartViewer extends ISelectionProvider, org.eclipse.gef.Edi
 	 * The layer directly below {@link #HANDLE_LAYER}.
 	 */
 	String HANDLE_LAYER_SUB_2 = "Handle Layer Sub 2";
-	/**
-	 * Identifies the layer containing handles, which are typically editing decorations that appear on
-	 * top of any model representations.
-	 */
-	String HANDLE_LAYER = "Handle Layer";
 	/**
 	 * The layer directly below {@link #HANDLE_LAYER}.
 	 */

org.eclipse.wb.core/src-gef/org/eclipse/wb/gef/graphical/policies/GraphicalEditPolicy.java

@@ -63,7 +63,7 @@ protected final IFigure getHostFigure() {
 	//@edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "ES_COMPARING_PARAMETER_STRING_WITH_EQ")
 	protected final Layer getLayer(String name) {
 		if (isOnMenuLayer()) {
-			if (name == IEditPartViewer.HANDLE_LAYER) {
+			if (name == LayerConstants.HANDLE_LAYER) {
 				name = IEditPartViewer.MENU_HANDLE_LAYER;
 			} else if (name == IEditPartViewer.HANDLE_LAYER_STATIC) {
 				name = IEditPartViewer.MENU_HANDLE_LAYER_STATIC;

org.eclipse.wb.core/src-gef/org/eclipse/wb/gef/graphical/policies/SelectionEditPolicy.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2011, 2025 Google, Inc. and others.
+ * Copyright (c) 2011, 2026 Google, Inc. and others.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License 2.0 which is available at
@@ -20,6 +20,7 @@
 
 import org.eclipse.gef.EditPartListener;
 import org.eclipse.gef.EditPolicy;
+import org.eclipse.gef.LayerConstants;
 import org.eclipse.gef.Request;
 import org.eclipse.gef.RequestConstants;
 
@@ -122,7 +123,7 @@ protected void hideStaticHandles() {
 	 */
 	protected void showSelection() {
 		hideSelection();
-		Layer layer = getLayer(IEditPartViewer.HANDLE_LAYER);
+		Layer layer = getLayer(LayerConstants.HANDLE_LAYER);
 		m_handles = createSelectionHandles();
 		for (Handle handle : m_handles) {
 			layer.add(handle);

org.eclipse.wb.core/src-gef/org/eclipse/wb/internal/gef/graphical/GraphicalViewer.java

@@ -25,6 +25,7 @@
 import org.eclipse.draw2d.geometry.Point;
 import org.eclipse.gef.EditPart;
 import org.eclipse.gef.Handle;
+import org.eclipse.gef.LayerConstants;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Cursor;
 import org.eclipse.swt.widgets.Composite;
@@ -218,7 +219,7 @@ public Handle findHandleAt(Point p) {
 		if ((target = findTargetHandle(HANDLE_LAYER_STATIC, p)) != null) {
 			return target;
 		}
-		if ((target = findTargetHandle(HANDLE_LAYER, p)) != null) {
+		if ((target = findTargetHandle(LayerConstants.HANDLE_LAYER, p)) != null) {
 			return target;
 		}
 		return null;

org.eclipse.wb.core/src-gef/org/eclipse/wb/internal/gef/graphical/RootEditPart.java

@@ -60,7 +60,7 @@ private void createLayers() {
 		m_rootFigure.addLayer(new Layer(IEditPartViewer.PRIMARY_LAYER));
 		m_rootFigure.addLayer(new Layer(IEditPartViewer.HANDLE_LAYER_SUB_1));
 		m_rootFigure.addLayer(new Layer(IEditPartViewer.HANDLE_LAYER_SUB_2));
-		m_rootFigure.addLayer(new Layer(IEditPartViewer.HANDLE_LAYER));
+		m_rootFigure.addLayer(new Layer(LayerConstants.HANDLE_LAYER));
 		m_rootFigure.addLayer(new Layer(IEditPartViewer.HANDLE_LAYER_STATIC));
 		m_rootFigure.addLayer(new Layer(IEditPartViewer.FEEDBACK_LAYER_SUB_1));
 		m_rootFigure.addLayer(new Layer(IEditPartViewer.FEEDBACK_LAYER_SUB_2));

org.eclipse.wb.tests/src/org/eclipse/wb/tests/gef/SelectionToolTest.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2011, 2025 Google, Inc. and others.
+ * Copyright (c) 2011, 2026 Google, Inc. and others.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License 2.0 which is available at
@@ -12,14 +12,14 @@
  *******************************************************************************/
 package org.eclipse.wb.tests.gef;
 
-import org.eclipse.wb.gef.core.IEditPartViewer;
 import org.eclipse.wb.gef.core.requests.ChangeBoundsRequest;
 import org.eclipse.wb.gef.core.requests.DragPermissionRequest;
 import org.eclipse.wb.gef.core.tools.Tool;
 import org.eclipse.wb.gef.graphical.handles.MoveHandle;
 import org.eclipse.wb.gef.graphical.tools.SelectionTool;
 
 import org.eclipse.draw2d.geometry.Point;
+import org.eclipse.gef.LayerConstants;
 import org.eclipse.gef.RequestConstants;
 import org.eclipse.gef.editparts.LayerManager;
 import org.eclipse.gef.requests.SelectionRequest;
@@ -231,7 +231,7 @@ public void test_DragTracker_MoveHandle() throws Exception {
 				addEditPart(editPart, "ChildEditPart", actualLogger, 50, 50, 70, 50);
 		//
 		MoveHandle handle = new MoveHandle(childEditPart);
-		LayerManager.Helper.find(m_viewer).getLayer(IEditPartViewer.HANDLE_LAYER).add(handle);
+		LayerManager.Helper.find(m_viewer).getLayer(LayerConstants.HANDLE_LAYER).add(handle);
 		//
 		RequestsLogger expectedLogger = new RequestsLogger();
 		//