bundles/org.eclipse.wst.css.ui/src/org/eclipse/wst/css/ui/views/contentoutline/JFaceNodeLabelProviderCSS.java

/*******************************************************************************
 * Copyright (c) 2004 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.css.ui.views.contentoutline;

import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSModel;
import org.eclipse.wst.sse.core.internal.provisional.INodeAdapter;
import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
import org.eclipse.wst.sse.ui.internal.contentoutline.IJFaceNodeAdapter;

class JFaceNodeLabelProviderCSS extends LabelProvider {

	/**
	 * JFaceNodeLabelProvider constructor comment.
	 */
	public JFaceNodeLabelProviderCSS() {
		super();
	}

	/**
	 * Returns the JFace adapter for the specified object.
	 * 
	 * @param adaptable
	 *            java.lang.Object The object to get the adapter for
	 */
	private IJFaceNodeAdapter getAdapter(Object adaptable) {
		IJFaceNodeAdapter adapter = null;
		if (adaptable instanceof ICSSModel) {
			adaptable = ((ICSSModel) adaptable).getDocument();
		}
		if (adaptable instanceof INodeNotifier) {
			INodeAdapter nodeAdapter = ((INodeNotifier) adaptable).getAdapterFor(IJFaceNodeAdapter.class);
			if (nodeAdapter instanceof IJFaceNodeAdapter)
				adapter = (IJFaceNodeAdapter) nodeAdapter;
		}
		return adapter;
	}

	/**
	 * Returns the image for the label of the given element, for use in the
	 * given viewer.
	 * 
	 * @param viewer
	 *            The viewer that displays the element.
	 * @param element
	 *            The element for which to provide the label image. Element
	 *            can be <code>null</code> indicating no input object is set
	 *            to the viewer.
	 */
	public Image getImage(Object element) {
		Image image = null;
		IJFaceNodeAdapter adapter = getAdapter(element);
		if (adapter != null)
			image = adapter.getLabelImage(element);
		return image;
	}

	/**
	 * Returns the text for the label of the given element, for use in the
	 * given viewer.
	 * 
	 * @param viewer
	 *            The viewer that displays the element.
	 * @param element
	 *            The element for which to provide the label text. Element can
	 *            be <code>null</code> indicating no input object is set to
	 *            the viewer.
	 */
	public String getText(Object element) {
		String text = null;
		IJFaceNodeAdapter adapter = getAdapter(element);
		if (adapter != null) {
			text = adapter.getLabelText(element);
		}
		return text;
	}

	/**
	 * Checks whether this label provider is affected by the given domain
	 * event.
	 * 
	 * @deprecated
	 */
	public boolean isAffected(Object dummy) {// DomainEvent event) {
		// return event.isModifier(DomainEvent.NON_STRUCTURE_CHANGE);
		return true;

	}

	/**
	 * Returns whether the label would be affected by a change to the given
	 * property of the given element. This can be used to optimize a
	 * non-structural viewer update. If the property mentioned in the update
	 * does not affect the label, then the viewer need not update the label.
	 * 
	 * @param element
	 *            the element
	 * @param property
	 *            the property
	 * @return <code>true</code> if the label would be affected, and
	 *         <code>false</code> if it would be unaffected
	 */
	public boolean isLabelProperty(Object element, String property) {
		return false;
	}
}