/*******************************************************************************
 * <copyright>
 *
 * Copyright (c) 2005, 2010 SAP AG.
 * 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:
 *    SAP AG - initial API, implementation and documentation
 *    Patch 185019 from Bug 332360 contributed by Volker Wegert
 *
 * </copyright>
 *
 *******************************************************************************/
package org.eclipse.graphiti.features.impl;

import org.eclipse.graphiti.features.DefaultResizeConfiguration;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.IResizeConfiguration;
import org.eclipse.graphiti.features.IResizeShapeFeature;
import org.eclipse.graphiti.features.context.IContext;
import org.eclipse.graphiti.features.context.IResizeShapeContext;
import org.eclipse.graphiti.features.context.impl.ResizeShapeContext;
import org.eclipse.graphiti.internal.Messages;
import org.eclipse.graphiti.mm.pictograms.ConnectionDecorator;
import org.eclipse.graphiti.mm.pictograms.Shape;
import org.eclipse.graphiti.services.Graphiti;

/**
 * The Class DefaultResizeShapeFeature.
 */
public class DefaultResizeShapeFeature extends AbstractFeature implements IResizeShapeFeature {

	/**
	 * Creates a new {@link DefaultResizeShapeFeature}.
	 * 
	 * @param fp
	 *            the feature provider
	 */
	public DefaultResizeShapeFeature(IFeatureProvider fp) {
		super(fp);
	}

	public boolean canResizeShape(IResizeShapeContext context) {
		if (context.getPictogramElement() instanceof ConnectionDecorator) {
			return false;
		}
		return true;
	}

	public void resizeShape(IResizeShapeContext context) {
		Shape shape = context.getShape();
		int x = context.getX();
		int y = context.getY();
		int width = context.getWidth();
		int height = context.getHeight();

		if (shape.getGraphicsAlgorithm() != null) {
			Graphiti.getGaService().setLocationAndSize(shape.getGraphicsAlgorithm(), x, y, width, height);
		}

		layoutPictogramElement(shape);
	}

	public boolean canExecute(IContext context) {
		boolean ret = false;
		if (context instanceof IResizeShapeContext) {
			ret = canResizeShape((IResizeShapeContext) context);
		}
		return ret;
	}

	public void execute(IContext context) {
		if (context instanceof IResizeShapeContext) {
			resizeShape((IResizeShapeContext) context);
		}
	}

	/**
	 * Resize shape.
	 * 
	 * @param currentShape
	 *            the current shape
	 */
	protected void resizeShape(Shape currentShape) {
		final ResizeShapeContext resizeShapeContext = new ResizeShapeContext(currentShape);
		final IResizeShapeFeature resizeShapeFeature = getFeatureProvider().getResizeShapeFeature(resizeShapeContext);
		if (resizeShapeFeature != null) {
			if (resizeShapeFeature.canResizeShape(resizeShapeContext)) {
				resizeShapeFeature.resizeShape(resizeShapeContext);
			}
		}
	}

	@Override
	public String getName() {
		return NAME;
	}

	private static final String NAME = Messages.DefaultResizeShapeFeature_0_xfld;

	public IResizeConfiguration getResizeConfiguration(IResizeShapeContext context) {
		return new DefaultResizeConfiguration();
	}
}