| /******************************************************************************* |
| * Copyright (c) 2000, 2018 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.examples.ole.win32; |
| |
| |
| import java.io.*; |
| import java.net.*; |
| import java.text.*; |
| import java.util.*; |
| |
| import org.eclipse.core.runtime.*; |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.ui.plugin.*; |
| import org.osgi.framework.*; |
| |
| /** |
| * The main plugin class to be used in the desktop. |
| */ |
| public class OlePlugin extends AbstractUIPlugin { |
| //The shared instance. |
| private static OlePlugin plugin; |
| private static ResourceBundle resourceBundle; |
| |
| static final int |
| biBack = 0, |
| biForward = 1, |
| biHome = 2, |
| biStop = 3, |
| biRefresh = 4, |
| biSearch = 5; |
| static final String[] imageLocations = { |
| "icons/backward_nav.gif", |
| "icons/forward_nav.gif", |
| "icons/home_nav.gif", |
| "icons/stop_nav.gif", |
| "icons/refresh_nav.gif", |
| "icons/search_nav.gif" }; |
| static Image images[]; |
| static Font browserFont; |
| |
| /** |
| * Constructs an OLE plugin. |
| */ |
| public OlePlugin() { |
| super(); |
| plugin = this; |
| } |
| |
| @Override |
| public void start(BundleContext context) throws Exception { |
| super.start(context); |
| resourceBundle = Platform.getResourceBundle(getBundle()); |
| } |
| |
| /** |
| * Clean up |
| */ |
| @Override |
| public void stop(BundleContext context) throws Exception { |
| freeResources(); |
| super.stop(context); |
| } |
| |
| /** |
| * Returns the shared instance. |
| */ |
| public static OlePlugin getDefault() { |
| return plugin; |
| } |
| |
| /** |
| * Returns a string from the resource bundle. |
| * We don't want to crash because of a missing String. |
| * Returns the key if not found. |
| */ |
| public static String getResourceString(String key) { |
| try { |
| return resourceBundle.getString(key); |
| } catch (MissingResourceException e) { |
| return key; |
| } catch (NullPointerException e) { |
| return "!" + key + "!"; |
| } |
| } |
| |
| /** |
| * Returns a string from the resource bundle and binds it |
| * with the given arguments. If the key is not found, |
| * return the key. |
| */ |
| public static String getResourceString(String key, Object[] args) { |
| try { |
| return MessageFormat.format(getResourceString(key), args); |
| } catch (MissingResourceException e) { |
| return key; |
| } catch (NullPointerException e) { |
| return "!" + key + "!"; |
| } |
| } |
| |
| /** |
| * Log an error to the ILog for this plugin |
| * |
| * @param message the localized error message text |
| * @param exception the associated exception, or null |
| */ |
| public static void logError(String message, Throwable exception) { |
| plugin.getLog().log(new Status( |
| IStatus.ERROR, plugin.getBundle().getSymbolicName(), 0, message, exception)); |
| } |
| |
| /** |
| * Loads the resources. |
| */ |
| public static void initResources() { |
| if (images == null) { |
| images = new Image[imageLocations.length]; |
| |
| for (int i = 0; i < imageLocations.length; ++i) { |
| images[i] = getImageFromPlugin(plugin.getBundle(), imageLocations[i]); |
| if (images[i] == null) { |
| freeResources(); |
| logError(getResourceString("error.CouldNotLoadResources"), null); |
| throw new IllegalStateException(); |
| } |
| } |
| } |
| if (browserFont == null) { |
| try { |
| browserFont = new Font (null, "MS Sans Serif", 8, SWT.NULL); |
| } catch (Throwable ex) { |
| } |
| } |
| if (images == null || browserFont == null) { |
| freeResources(); |
| logError(getResourceString("error.CouldNotLoadResources"), null); |
| throw new IllegalStateException(); |
| } |
| } |
| |
| /** |
| * Frees the resources |
| */ |
| public static void freeResources() { |
| if (images != null) { |
| for (final Image image : images) { |
| if (image != null) image.dispose(); |
| } |
| images = null; |
| } |
| if (browserFont != null) browserFont.dispose (); |
| browserFont = null; |
| } |
| |
| /** |
| * Gets an image from a path relative to the plugin install directory. |
| * |
| * @param pd the plugin descriptor for the plugin with the image |
| * @param iconPath the path relative to the install directory |
| * @return the image, or null if not found |
| */ |
| private static Image getImageFromPlugin(Bundle bundle, String iconPath) { |
| InputStream is = null; |
| try { |
| URL installUrl = bundle.getEntry("/"); |
| URL url = new URL(installUrl, iconPath); |
| is = url.openConnection().getInputStream(); |
| ImageData source = new ImageData(is); |
| ImageData mask = source.getTransparencyMask(); |
| Image image = new Image(null, source, mask); |
| return image; |
| } catch (Throwable ex) { |
| return null; |
| } finally { |
| try { |
| if (is != null) is.close(); |
| } catch (IOException e) { |
| } |
| } |
| } |
| } |