/*******************************************************************************
* Copyright (c) 2000, 2007 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.jsdt.internal.ui.javaeditor.selectionactions;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.action.Action;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.texteditor.IUpdate;
import org.eclipse.wst.jsdt.core.ISourceRange;
import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
import org.eclipse.wst.jsdt.internal.ui.javaeditor.JavaEditor;
public class StructureSelectHistoryAction extends Action implements IUpdate {
private JavaEditor fEditor;
private SelectionHistory fHistory;
public StructureSelectHistoryAction(JavaEditor editor, SelectionHistory history) {
super(SelectionActionMessages.StructureSelectHistory_label);
setToolTipText(SelectionActionMessages.StructureSelectHistory_tooltip);
setDescription(SelectionActionMessages.StructureSelectHistory_description);
Assert.isNotNull(history);
Assert.isNotNull(editor);
fHistory= history;
fEditor= editor;
update();
PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.STRUCTURED_SELECTION_HISTORY_ACTION);
}
public void update() {
setEnabled(!fHistory.isEmpty());
}
public void run() {
ISourceRange old= fHistory.getLast();
if (old != null) {
try {
fHistory.ignoreSelectionChanges();
fEditor.selectAndReveal(old.getOffset(), old.getLength());
} finally {
fHistory.listenToSelectionChanges();
}
}
}
}