| /******************************************************************************* |
| * Copyright (c) 2005, 2006 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.debug.internal.ui.viewers; |
| |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelChangedListener; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxy; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| |
| /** |
| * Default update policy updates a viewer based on model deltas. |
| * |
| * @since 3.2 |
| */ |
| public class TableUpdatePolicy extends org.eclipse.debug.internal.ui.viewers.AbstractUpdatePolicy implements IModelChangedListener { |
| |
| @Override |
| public void modelChanged(IModelDelta delta, IModelProxy proxy) { |
| updateNodes(new IModelDelta[] {delta}); |
| } |
| |
| private void handleState(IModelDelta node) { |
| AsynchronousViewer viewer = getViewer(); |
| if (viewer != null) { |
| Object element = node.getElement(); |
| viewer.update(element); |
| updateSelection(element, node.getFlags()); |
| } |
| } |
| private void handleContent(IModelDelta node) { |
| AsynchronousViewer viewer = getViewer(); |
| if (viewer != null) { |
| Object element = node.getElement(); |
| viewer.refresh(element); |
| updateSelection(element, node.getFlags()); |
| } |
| } |
| |
| private void updateSelection(Object element, int flags) { |
| AsynchronousViewer viewer = getViewer(); |
| if (viewer != null) { |
| if ((flags & IModelDelta.SELECT) != 0) { |
| getViewer().setSelection(new StructuredSelection(element)); |
| } |
| } |
| } |
| |
| protected void updateNodes(IModelDelta[] nodes) { |
| for (int i = 0; i < nodes.length; i++) { |
| IModelDelta node = nodes[i]; |
| int flags = node.getFlags(); |
| |
| if ((flags & IModelDelta.STATE) != 0) { |
| handleState(node); |
| } |
| if ((flags & IModelDelta.CONTENT) != 0) { |
| handleContent(node); |
| } |
| if ((flags & IModelDelta.ADDED) != 0) { |
| handleAdd(node); |
| } |
| if ((flags & IModelDelta.REMOVED) != 0) { |
| handleRemove(node); |
| } |
| if ((flags & IModelDelta.REPLACED) != 0) { |
| handleReplace(node); |
| } |
| if ((flags & IModelDelta.INSERTED) != 0) { |
| handleInsert(node); |
| } |
| |
| IModelDelta[] childNodes = node.getChildDeltas(); |
| updateNodes(childNodes); |
| } |
| } |
| |
| private void handleInsert(IModelDelta node) { |
| AsynchronousTableViewer viewer = (AsynchronousTableViewer) getViewer(); |
| if (viewer != null) { |
| viewer.insert(node.getElement(), node.getIndex()); |
| updateSelection(node.getElement(), node.getFlags()); |
| } |
| } |
| |
| private void handleReplace(IModelDelta node) { |
| AsynchronousTableViewer viewer = (AsynchronousTableViewer) getViewer(); |
| if (viewer != null) { |
| viewer.replace(node.getElement(), node.getReplacementElement()); |
| updateSelection(node.getReplacementElement(), node.getFlags()); |
| } |
| } |
| |
| protected void handleAdd(IModelDelta node) { |
| ((AsynchronousTableViewer) getViewer()).add(node.getElement()); |
| updateSelection(node.getElement(), node.getFlags()); |
| } |
| |
| protected void handleRemove(IModelDelta node) { |
| ((AsynchronousTableViewer) getViewer()).remove(node.getElement()); |
| } |
| } |