org.eclipse.rap.ui.internal.launch.rwt.util.Images.java Source code

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Here is the source code for org.eclipse.rap.ui.internal.launch.rwt.util.Images.java

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/*******************************************************************************
 * Copyright (c) 2000, 2008 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.rap.ui.internal.launch.rwt.util;

import java.net.URL;

import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.rap.ui.internal.launch.rwt.RWTLaunchActivator;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.osgi.framework.Bundle;

public final class Images {

    public static final String VIEW_MAIN_TAB = "VIEW_MAIN_TAB"; //$NON-NLS-1$
    public static final String VIEW_ARGUMENTS_TAB = "VIEW_ARGUMENTS_TAB"; //$NON-NLS-1$

    private static String ICONS_PATH = "$nl$/icons/full/"; //$NON-NLS-1$
    private static final String EVIEW = ICONS_PATH + "eview16/"; //$NON-NLS-1$

    private static ImageRegistry imageRegistry;

    public static Image getImage(String key) {
        return getImageRegistry().get(key);
    }

    public static ImageDescriptor getImageDescriptor(String key) {
        return getImageRegistry().getDescriptor(key);
    }

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

    private static void initializeImageRegistry() {
        imageRegistry = new ImageRegistry(Display.getCurrent());
        declareImages();
    }

    private static void declareImages() {
        declareRegistryImage(VIEW_ARGUMENTS_TAB, EVIEW + "arguments_tab.gif"); //$NON-NLS-1$
        declareRegistryImage(VIEW_MAIN_TAB, EVIEW + "main_tab.gif"); //$NON-NLS-1$
    }

    private static void declareRegistryImage(String key, String path) {
        ImageDescriptor desc = ImageDescriptor.getMissingImageDescriptor();
        Bundle bundle = RWTLaunchActivator.getDefault().getBundle();
        URL url = null;
        if (bundle != null) {
            url = FileLocator.find(bundle, new Path(path), null);
            if (url != null) {
                desc = ImageDescriptor.createFromURL(url);
            }
        }
        imageRegistry.put(key, desc);
    }
}