/*******************************************************************************
 * Copyright (c) 2004, 2005 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.gef.examples.text.model.commands;

import org.eclipse.gef.examples.text.GraphicalTextViewer;
import org.eclipse.gef.examples.text.SelectionRange;
import org.eclipse.gef.examples.text.edit.TextEditPart;
import org.eclipse.gef.examples.text.model.Container;
import org.eclipse.gef.examples.text.model.TextRun;

/**
 * @since 3.1
 */
public class NestElementCommand extends ExampleTextCommand {

private TextRun run;
private Container newParent;
int index;
private int caretOffset;

public NestElementCommand(TextEditPart part, int caretOffset) {
	super("indent");
	this.caretOffset = caretOffset;
	run = (TextRun)part.getModel();
	index = run.getContainer().getChildren().indexOf(run);
}

public void execute() {
	Container container = run.getContainer();

	newParent = (Container)container.getChildren().get(index - 1);
	container.remove(run);
	run.setType(newParent.getChildType());
	newParent.add(run);
}

public boolean canExecute() {
	if (index == 0)
		return false;
	return run.getContainer().getChildren().get(index - 1) instanceof Container;
}

public SelectionRange getExecuteSelectionRange(GraphicalTextViewer viewer) {
	return new SelectionRange(lookupModel(viewer, run), caretOffset);
}

public SelectionRange getRedoSelectionRange(GraphicalTextViewer viewer) {
	return getExecuteSelectionRange(viewer);
}

public SelectionRange getUndoSelectionRange(GraphicalTextViewer viewer) {
	return getExecuteSelectionRange(viewer);
}

}