/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.editors.actions;
import java.text.MessageFormat;
import org.eclipse.emf.common.command.Command;
import org.eclipse.gef.ui.actions.UpdateAction;
import org.eclipse.jface.action.Action;
import org.eclipse.jst.pagedesigner.editors.SimpleGraphicalEditor;
import org.eclipse.wst.sse.core.internal.undo.IStructuredTextUndoManager;
/**
* SSE has a IDocumentSelectionMediator mechanism, basically it let the viewer
* that invoke the redo/undo to reset the selection after redo/undo.
*
* To utilize this feature, we can't directly use the undo/redo action of the
* text editor for the designer, since in that way it will be the TextEditor to
* handle selection after redo/undo.
*
* @author mengbo
* @version 1.5
*/
public class DesignerUndoRedoAction extends Action implements UpdateAction {
private boolean _undo = true; // if false means redo
private final SimpleGraphicalEditor _designer;
/**
* @param undo
* @param designer
*
*/
public DesignerUndoRedoAction(boolean undo, SimpleGraphicalEditor designer) {
this._undo = undo;
this._designer = designer;
if (undo) {
setText(ActionsMessages.getString("DesignerUndoRedoAction.UNDO")); //$NON-NLS-1$
} else {
setText(ActionsMessages.getString("DesignerUndoRedoAction.REDO")); //$NON-NLS-1$
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.ui.actions.UpdateAction#update()
*/
public void update() {
IStructuredTextUndoManager undoManager = _designer.getHTMLEditor()
.getModel().getUndoManager();
if (_undo) {
Command c = undoManager.getUndoCommand();
this.setEnabled(undoManager.undoable());
if (c != null) {
String label = c.getLabel();
this
.setText(MessageFormat
.format(
ActionsMessages
.getString("DesignerUndoRedoAction.UNDO_LABEL"), new Object[] { label })); //$NON-NLS-1$
} else {
this.setText(ActionsMessages
.getString("DesignerUndoRedoAction.UNDO")); //$NON-NLS-1$
}
} else {
Command c = undoManager.getRedoCommand();
this.setEnabled(undoManager.redoable());
if (c != null) {
String label = c.getLabel();
this
.setText(MessageFormat
.format(
ActionsMessages
.getString("DesignerUndoRedoAction.REDO_LABEL"), new Object[] { label })); //$NON-NLS-1$
} else {
this.setText(ActionsMessages
.getString("DesignerUndoRedoAction.REDO")); //$NON-NLS-1$
}
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.action.Action#run()
*/
public void run() {
IStructuredTextUndoManager undoManager = _designer.getHTMLEditor()
.getModel().getUndoManager();
if (_undo) {
undoManager.undo(_designer);
} else {
undoManager.redo(_designer);
}
}
}