/*******************************************************************************
 * Copyright (c) 2002, 2015 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 Rational Software - Initial API and implementation
 * Red Hat Inc. - Modification for Autotools usage
 *******************************************************************************/
package org.eclipse.cdt.internal.autotools.ui.properties;

import org.eclipse.cdt.internal.autotools.core.configure.IAConfiguration;
import org.eclipse.cdt.internal.autotools.core.configure.IConfigureOption;
import org.eclipse.cdt.internal.autotools.ui.AutotoolsUIPluginImages;
import org.eclipse.cdt.ui.newui.UIMessages;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
 
public class ToolListLabelProvider extends LabelProvider {
	private final Image IMG_TOOL = AutotoolsUIPluginImages.get(AutotoolsUIPluginImages.IMG_CFG_TOOL);
	private final Image IMG_CAT = AutotoolsUIPluginImages.get(AutotoolsUIPluginImages.IMG_CFG_CATEGORY);
	private static final String ERROR_UNKNOWN_ELEMENT = "ConfigurePropertyPage.error.Unknown_tree_element";	//$NON-NLS-1$

	private ImageDescriptor descriptor = null;
	private ResourceManager manager = null;
	private IAConfiguration cfg = null;
	
	public ToolListLabelProvider(IAConfiguration cfg) {
		this.cfg = cfg;
	}
	
	public IAConfiguration getCfg() {
		return cfg;
	}
	
	public void setCfg(IAConfiguration cfg) {
		this.cfg = cfg;
	}
	
	@Override
	public Image getImage(Object element) {
		if (!(element instanceof ToolListElement)) {
			throw unknownElement(element);
		}
		Image defaultImage = IMG_CAT;
		ToolListElement toolListElement = (ToolListElement)element;
		IConfigureOption cat = cfg.getOption(toolListElement.getName());
	
		if (cat == null) {
			defaultImage = IMG_TOOL;
		}
		
		// Use default icon for display 
		return defaultImage;
	}

	@Override
	public String getText(Object element) {
		if (!(element instanceof ToolListElement)) {
			throw unknownElement(element);
		}
		ToolListElement toolListElement = (ToolListElement)element;
		IConfigureOption cat = cfg.getOption(toolListElement.getName());
	
		if (cat == null) {
			return toolListElement.getName();
		}
		else {
			return cat.getDescription();
		}
	}

	protected RuntimeException unknownElement(Object element) {
		return new RuntimeException(UIMessages.getFormattedString(ERROR_UNKNOWN_ELEMENT, element.getClass().getName()));
	}

    /**
     * Disposing any images that were allocated for it.
     * 
     * @since 3.0
     */
    @Override
	public void dispose() {
        if (descriptor != null && manager != null) {
            manager.destroyImage(descriptor);
        }
    };
}