/**********************************************************************
 * Copyright (c) 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 *
 * Contributors:
 *    IBM - Initial API and implementation
 **********************************************************************/
package net.sourceforge.phpdt.monitor.ui.internal.view;

import net.sourceforge.phpdt.monitor.core.IRequest;
import net.sourceforge.phpdt.monitor.ui.internal.*;

import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.swt.graphics.Image;
/**
 * A label provider for the monitor server view.
 */
public class TreeLabelProvider implements ILabelProvider {
	/**
	 * TreeLabelProvider constructor comment.
	 */
	public TreeLabelProvider() {
		super();
	}

	/**
	 * Adds a listener to this label provider. Label provider listeners are 
	 * informed about state changes that affect the rendering of the viewer
	 * that uses this label provider.
	 *
	 * @param listener a label provider listener
	 */
	public void addListener(ILabelProviderListener listener) {}

	/**
	 * Disposes of this label provider.
	 * <p>
	 * [Issue: This method should be changed to take a Viewer,
	 * renamed and repurposed to disconnect a label provider from
	 * a viewer.
	 * ]
	 * </p>
	 */
	public void dispose() {}

	/**
	 * Returns the image for the label of the given element for use
	 * in the given viewer.
	 *
	 * @param element the element for which to provide the label image
	 * @return the image used to label the element, or <code>null</code>
	 *   if these is no image for the given object
	 */
	public Image getImage(Object element) {
		if (element instanceof IRequest)
			return MonitorUIPlugin.getImage(MonitorUIPlugin.IMG_REQUEST_RESPONSE);
		else
			return MonitorUIPlugin.getImage(MonitorUIPlugin.IMG_HOST);
	}

	/**
	 * 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
	 * @return the text string used to label the element, or <code>null</code>
	 *   if these is no text label for the given object
	 */
	public String getText(Object element) {
		if (element instanceof IRequest) {
			IRequest call = (IRequest) element;
			return call.getLabel();
		} else if (element instanceof Integer) {
			Integer in = (Integer) element;
			return "localhost:" + in.intValue();
		} else
			return element.toString();
	}

	/**
	 * 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;
	}
	
	/**
	 * Removes a listener to this label provider.
	 * Has no affect if the listener is not registered.
	 *
	 * @param listener a label provider listener
	 */
	public void removeListener(ILabelProviderListener listener) {}
}