/*******************************************************************************
 * Copyright (c) 2000, 2010 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.ui.stackview;

import org.eclipse.swt.graphics.Image;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;

import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.CommandStack;

/**
 * Internal class used for a debug view.
 * 
 * @deprecated this class will be deleted
 */
public class TreeLabelProvider implements
		org.eclipse.jface.viewers.ILabelProvider {

	/** The CommandStack **/
	protected CommandStack stack = null;
	/** Icons associated with a TreeLabelProvider **/
	protected static Image yesIcon = ImageDescriptor.createFromFile(
			TreeLabelProvider.class, "icons/YESGRN.gif").createImage(), //$NON-NLS-1$
			noIcon = ImageDescriptor.createFromFile(TreeLabelProvider.class,
					"icons/NORED.gif").createImage(); //$NON-NLS-1$
	/** Label style constants **/
	public static byte NORMAL_LABEL_STYLE = 2, DEBUG_LABEL_STYLE = 3;

	/** Label style, NORMAL_LABEL_STYLE by default **/
	protected byte labelStyle = NORMAL_LABEL_STYLE;

	/**
	 * Creates a new TreeLabelProvider with the given CommandStack
	 * 
	 * @param stack
	 *            the CommandStack
	 */
	public TreeLabelProvider(CommandStack stack) {
		this.stack = stack;
	}

	/**
	 * @see org.eclipse.jface.viewers.IBaseLabelProvider#addListener(ILabelProviderListener)
	 */
	public void addListener(ILabelProviderListener l) {
	}

	/**
	 * @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
	 */
	public void dispose() {
	}

	/**
	 * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
	 */
	public Image getImage(Object o) {
		if (o instanceof Command) {
			Command command = (Command) o;
			// if(((DefaultCommandStack)stack).canUndoCommand(command))
			// return yesIcon;
			// if(((DefaultCommandStack)stack).canRedoCommand(command))
			// return noIcon;
			if (command.canUndo())
				return yesIcon;
			else
				return noIcon;
		}
		return null;
	}

	/**
	 * Returns the label style of this TreeLabelProvider.
	 * 
	 * @return the label style
	 */
	public byte getLabelStyle() {
		return labelStyle;
	}

	/**
	 * @see ILabelProvider#getText(java.lang.Object)
	 */
	public String getText(Object o) {
		if (o instanceof CommandStack)
			return "Command Stack";//$NON-NLS-1$
		if (o instanceof Command) {
			if (getLabelStyle() == NORMAL_LABEL_STYLE)
				if (((Command) o).getLabel() == null)
					return "";//$NON-NLS-1$
				else
					return ((Command) o).getLabel();
			if (getLabelStyle() == DEBUG_LABEL_STYLE)
				if (((Command) o).getDebugLabel() == null)
					return "";//$NON-NLS-1$
				else
					return ((Command) o).getDebugLabel();
		}
		if (o instanceof Command)
			return ((Command) o).getLabel();
		return "???";//$NON-NLS-1$
	}

	/**
	 * @see org.eclipse.jface.viewers.IBaseLabelProvider#isLabelProperty(java.lang.Object,
	 *      java.lang.String)
	 */
	public boolean isLabelProperty(Object element, String property) {
		return false;
	}

	/**
	 * @see org.eclipse.jface.viewers.IBaseLabelProvider#removeListener(org.eclipse.jface.viewers.ILabelProviderListener)
	 */
	public void removeListener(ILabelProviderListener l) {
	}

	/**
	 * Sets the labelStyle to the passed value
	 * 
	 * @param labelStyle
	 *            the label style
	 */
	public void setLabelStyle(byte labelStyle) {
		this.labelStyle = labelStyle;
	}

}
