/*******************************************************************************
* 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;
}
}