org.eclipse.fmc.blockdiagram.editor/src/org/eclipse/fmc/blockdiagram/editor/features/ContainerTextDirectEditingFeature.java

/*******************************************************************************
 * <copyright>
 *
 * Copyright (c) 2013, 2013 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
 *
 * </copyright>
 *
 *******************************************************************************/
package org.eclipse.fmc.blockdiagram.editor.features;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IDirectEditingContext;
import org.eclipse.graphiti.mm.algorithms.AbstractText;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.Shape;

/**
 * This is the direct editing feature class for containers. If a container is
 * clicked for direct editing the nested text will be found and edited.
 * 
 * @author Benjamin Schmeling
 * 
 */
public class ContainerTextDirectEditingFeature extends TextDirectEditingFeature {

	/**
	 * Main constructor.
	 * 
	 * @param featureProvider The feature provider.
	 */
	public ContainerTextDirectEditingFeature(IFeatureProvider featureProvider) {
		super(featureProvider);
	}

	/**
	 * Finds the next nested text in a container.
	 * 
	 * @param container
	 *            The ContainerShape to search in.
	 * @return The found AbstractText, else null.
	 */
	private AbstractText findTextInContainer(ContainerShape container) {
		for (Shape shape : container.getChildren()) {
			if (shape.getGraphicsAlgorithm() instanceof AbstractText)
				return (AbstractText) shape.getGraphicsAlgorithm();
		}
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.fmc.blockdiagram.editor.features.TextDirectEditingFeature#getText
	 * (org.eclipse.graphiti.features.context.IDirectEditingContext)
	 */
	@Override
	protected AbstractText getText(IDirectEditingContext context) {
		EObject container = context.getPictogramElement().eContainer();
		if (container instanceof ContainerShape) {
			ContainerShape containerShape = (ContainerShape) container;
			int containerCounter = 0;
			for (Shape shape : containerShape.getChildren()) {
				if (shape instanceof ContainerShape) {
					containerCounter++;
					if (containerCounter == 2) {
						return findTextInContainer((ContainerShape) shape);
					}

				}
			}
			return null;
		} else
			return null;
	}

}