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/*******************************************************************************
* Copyright (c) 2005, 2019 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.ui.internal.cheatsheets.composite.views;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.internal.cheatsheets.CheatSheetPlugin;
import org.eclipse.ui.internal.cheatsheets.ICheatSheetResource;
import org.eclipse.ui.internal.cheatsheets.Messages;
import org.eclipse.ui.internal.cheatsheets.registry.CheatSheetRegistryReader;
import org.eclipse.ui.internal.provisional.cheatsheets.TaskExplorer;
import org.osgi.framework.Bundle;
public class TaskExplorerManager {
private static TaskExplorerManager instance;
private Map<String, Image> images;
private TaskExplorerManager() {
}
public static TaskExplorerManager getInstance() {
if (instance == null) {
instance = new TaskExplorerManager();
}
return instance;
}
public TaskExplorer getExplorer(String explorerKind) {
CheatSheetRegistryReader.TaskExplorerNode explorerInfo =
CheatSheetRegistryReader.getInstance().findTaskExplorer(explorerKind);
if (explorerInfo != null) {
TaskExplorer explorerInstance = null;
Class<?> extClass = null;
String className = explorerInfo.getClassName();
try {
Bundle bundle = Platform.getBundle(explorerInfo.getPluginId());
extClass = bundle.loadClass(className);
} catch (Exception e) {
String message = NLS.bind(Messages.ERROR_LOADING_CLASS, (new Object[] {className}));
Status status = new Status(IStatus.ERROR, ICheatSheetResource.CHEAT_SHEET_PLUGIN_ID, IStatus.OK, message, e);
CheatSheetPlugin.getPlugin().getLog().log(status);
}
try {
if (extClass != null) {
Constructor<?> c = extClass.getConstructor();
explorerInstance = (TaskExplorer) c.newInstance();
}
} catch (Exception e) {
String message = NLS.bind(Messages.ERROR_CREATING_CLASS, (new Object[] {className}));
IStatus status = new Status(IStatus.ERROR, ICheatSheetResource.CHEAT_SHEET_PLUGIN_ID, IStatus.OK, message, e);
CheatSheetPlugin.getPlugin().getLog().log(status);
}
return explorerInstance;
}
return null;
}
private ImageDescriptor getImageDescriptor(String explorerKind) {
CheatSheetRegistryReader.TaskExplorerNode explorerInfo =
CheatSheetRegistryReader.getInstance().findTaskExplorer(explorerKind);
if (explorerInfo == null) {
return null;
}
String iconPath = explorerInfo.getIconPath();
if (iconPath == null) {
return null;
}
Bundle bundle = Platform.getBundle(explorerInfo.getPluginId());
URL url = FileLocator.find(bundle, new Path(iconPath), null);
try {
url = FileLocator.resolve(url);
return ImageDescriptor.createFromURL(url);
} catch (IOException e) {
return null;
}
}
private Map<String, Image> getImages() {
if (images == null) {
initImages();
}
return images;
}
private void initImages() {
if (images == null) {
images = new HashMap<>();
String[] ids = CheatSheetRegistryReader.getInstance().getExplorerIds();
for (String id : ids) {
ImageDescriptor descriptor = getImageDescriptor(id);
if (descriptor != null) {
images.put(id, descriptor.createImage());
}
}
}
}
public String getName(String explorerKind) {
CheatSheetRegistryReader.TaskExplorerNode explorerInfo =
CheatSheetRegistryReader.getInstance().findTaskExplorer(explorerKind);
if (explorerInfo != null) {
return explorerInfo.getName();
}
return null;
}
public Image getImage(String id) {
return getImages().get(id);
}
}
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