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/*******************************************************************************
* 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) {
}
}
}
}
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