com.github.sdbg.debug.ui.internal.SDBGDebugUIPlugin.java Source code

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Here is the source code for com.github.sdbg.debug.ui.internal.SDBGDebugUIPlugin.java

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/*
 * Copyright (c) 2012, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.github.sdbg.debug.ui.internal;

import com.github.sdbg.debug.ui.internal.objectinspector.InspectorActionFilter;
import com.github.sdbg.debug.ui.internal.presentation.SDBGElementAdapterFactory;

import java.util.HashMap;
import java.util.Map;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle
 */
public class SDBGDebugUIPlugin extends AbstractUIPlugin {

    public static final String PLUGIN_ID = "com.github.sdbg.debug.ui"; //$NON-NLS-1$

    private static Map<ImageDescriptor, Image> imageCache = new HashMap<ImageDescriptor, Image>();

    public static Image getImage(ImageDescriptor imageDescriptor) {
        Image image = imageCache.get(imageDescriptor);

        if (image == null) {
            image = imageDescriptor.createImage();

            imageCache.put(imageDescriptor, image);
        }

        return image;
    }

    public static ImageDescriptor getImageDescriptor(String path) {
        return imageDescriptorFromPlugin(PLUGIN_ID, "icons/" + path);
    }

    private Map<String, Image> imageMap;

    /**
     * The shared instance
     */
    private static SDBGDebugUIPlugin plugin;

    /**
     * Returns the shared instance
     * 
     * @return the shared instance
     */
    public static SDBGDebugUIPlugin getDefault() {
        return plugin;
    }

    /**
     * Get a image from this plugin's icons directory.
     * 
     * @param imagePath the image path, relative to the icons directory.
     * @return the specified image
     */
    public static Image getImage(String imagePath) {
        return getDefault().getPluginImage(imagePath);
    }

    /**
     * Log an error message
     * 
     * @param message the error messsage
     */
    public static void logError(String message) {
        getDefault().getLog().log(new Status(IStatus.ERROR, SDBGDebugUIPlugin.PLUGIN_ID, message));
    }

    /**
     * Log the specified error to the Eclipse error log
     * 
     * @param e the exception
     */
    public static void logError(Throwable e) {
        getDefault().getLog().log(new Status(IStatus.ERROR, SDBGDebugUIPlugin.PLUGIN_ID, e.toString(), e));
    }

    /**
     * Called when the bundle is first started
     */
    @Override
    public void start(BundleContext context) throws Exception {
        plugin = this;

        imageMap = new HashMap<String, Image>();

        super.start(context);

        SDBGElementAdapterFactory.init();

        InspectorActionFilter.registerAdapters();

        // Initialize the DebuggerViewManager.
        //&&&    DebuggerViewManager.getDefault();

        // Install our user agent manager.
        SDBGDebugUserAgentManager.install();
    }

    /**
     * Called when the bundle is stopped
     */
    @Override
    public void stop(BundleContext context) throws Exception {
        //&&&    DebuggerViewManager.dispose();

        super.stop(context);

        disposeImageCache();

        plugin = null;
    }

    private void disposeImageCache() {
        for (Image image : imageMap.values()) {
            image.dispose();
        }

        imageMap = null;
    }

    private Image getPluginImage(String imagePath) {
        if (imageMap.get(imagePath) == null) {
            ImageDescriptor imageDescriptor = imageDescriptorFromPlugin(PLUGIN_ID, "icons/" + imagePath);

            if (imageDescriptor != null) {
                imageMap.put(imagePath, imageDescriptor.createImage());
            }
        }

        return imageMap.get(imagePath);
    }

}