| /******************************************************************************* |
| * Copyright (c) 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.wst.sse.ui.internal.handlers; |
| |
| import org.eclipse.core.commands.AbstractHandler; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.handlers.HandlerUtil; |
| import org.eclipse.ui.texteditor.ITextEditor; |
| import org.eclipse.wst.sse.ui.internal.selection.SelectionHistory; |
| |
| public class StructuredSelectHistoryHandler extends AbstractHandler { |
| |
| public Object execute(ExecutionEvent event) throws ExecutionException { |
| IEditorPart editor = HandlerUtil.getActiveEditor(event); |
| SelectionHistory history = (SelectionHistory) editor.getAdapter(SelectionHistory.class); |
| if (history != null) { |
| IRegion old = history.getLast(); |
| if (old != null) { |
| try { |
| history.ignoreSelectionChanges(); |
| |
| ITextEditor textEditor = null; |
| if (editor instanceof ITextEditor) |
| textEditor = (ITextEditor) editor; |
| else { |
| Object o = editor.getAdapter(ITextEditor.class); |
| if (o != null) |
| textEditor = (ITextEditor) o; |
| } |
| if (textEditor != null) |
| textEditor.selectAndReveal(old.getOffset(), old.getLength()); |
| } |
| finally { |
| history.listenToSelectionChanges(); |
| } |
| } |
| } |
| return null; |
| } |
| } |