org.eclipse.mylyn.internal.xplanner.ui.XPlannerImages.java Source code

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Here is the source code for org.eclipse.mylyn.internal.xplanner.ui.XPlannerImages.java

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/*******************************************************************************
 * Copyright (c) 2007, 2009 CodeGear 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
 *******************************************************************************/
package org.eclipse.mylyn.internal.xplanner.ui;

import java.net.MalformedURLException;
import java.net.URL;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.mylyn.internal.commons.ui.TaskListImageDescriptor;
import org.eclipse.swt.graphics.Image;

/**
 * @author Ravi Kumar
 * @author Helen Bershadskaya
 */
@SuppressWarnings("restriction")
public class XPlannerImages {

    private static ImageRegistry imageRegistry;

    private static final String T_VIEW = "eview16"; //$NON-NLS-1$

    private static final URL baseURL = XPlannerUiPlugin.getDefault() == null ? null
            : XPlannerUiPlugin.getDefault().getBundle().getEntry("/icons/"); //$NON-NLS-1$ 

    public static final ImageDescriptor OVERLAY_XPLANNER = create(T_VIEW, "overlay-xplanner.gif"); //$NON-NLS-1$

    public static final ImageDescriptor OVERLAY_ITERATION = create(T_VIEW, "overlay-iteration.gif"); //$NON-NLS-1$

    public static final ImageDescriptor OVERLAY_USER_STORY = create(T_VIEW, "overlay-userstory.gif"); //$NON-NLS-1$

    public static final ImageDescriptor OVERLAY_TASK = create(T_VIEW, "overlay-task.gif"); //$NON-NLS-1$

    public static final ImageDescriptor TREEITEM_PROJECT = create(T_VIEW, "treeitem-project.gif"); //$NON-NLS-1$

    public static final ImageDescriptor TREEITEM_ITERATION = create(T_VIEW, "treeitem-iteration.gif"); //$NON-NLS-1$

    public static final ImageDescriptor TREEITEM_USER_STORY = create(T_VIEW, "treeitem-userstory.gif"); //$NON-NLS-1$

    public static final ImageDescriptor TREEITEM_PROJECT_OVERLAY = create(TREEITEM_PROJECT, OVERLAY_XPLANNER);

    public static final ImageDescriptor TREEITEM_ITERATION_OVERLAY = create(TREEITEM_ITERATION, OVERLAY_XPLANNER);

    public static final ImageDescriptor TREEITEM_USER_STORY_OVERLAY = create(TREEITEM_USER_STORY, OVERLAY_XPLANNER);

    private XPlannerImages() {

    }

    private static ImageDescriptor create(String prefix, String name) {
        ImageDescriptor id;
        try {
            id = ImageDescriptor.createFromURL(makeIconFileURL(prefix, name));
        } catch (MalformedURLException e) {
            id = ImageDescriptor.getMissingImageDescriptor();
        }

        return id;
    }

    private static ImageDescriptor create(ImageDescriptor imageDescriptor, ImageDescriptor overlayDescriptor) {
        return new TaskListImageDescriptor(imageDescriptor, overlayDescriptor, false, false); // bottom right
    }

    private static URL makeIconFileURL(String prefix, String name) throws MalformedURLException {
        if (baseURL == null) {
            throw new MalformedURLException();
        }

        StringBuilder buffer = new StringBuilder(prefix);
        buffer.append('/');
        buffer.append(name);
        return new URL(baseURL, buffer.toString());
    }

    private static ImageRegistry getImageRegistry() {
        if (imageRegistry == null) {
            imageRegistry = new ImageRegistry();
        }

        return imageRegistry;
    }

    /**
     * Lazily initializes image map.
     */
    public static Image getImage(ImageDescriptor imageDescriptor) {
        ImageRegistry imageRegistry = getImageRegistry();

        Image image = imageRegistry.get("" + imageDescriptor.hashCode()); //$NON-NLS-1$
        if (image == null) {
            image = imageDescriptor.createImage();
            imageRegistry.put("" + imageDescriptor.hashCode(), image); //$NON-NLS-1$
        }

        return image;
    }

}