1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.editors.win32;
14 import java.util.ArrayList;
15 import java.util.Arrays;
16 import java.util.Collections;
17 import java.util.List;
19 import org.eclipse.core.runtime.IConfigurationElement;
20 import org.eclipse.core.runtime.IExtension;
21 import org.eclipse.core.runtime.IExtensionPoint;
22 import org.eclipse.core.runtime.Platform;
23 import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;
24 import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;
25 import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;
26 import org.eclipse.core.runtime.dynamichelpers.IFilter;
27 import org.simantics.editors.win32.ole.EditorDefinition;
28 import org.simantics.utils.ui.ErrorLogger;
30 public class EditorDefinitionManager implements IExtensionChangeHandler {
32 private final static String NAMESPACE = Activator.PLUGIN_ID;
34 private final static String EP_NAME = "editorDefinition";
36 private ExtensionTracker tracker;
38 private List<IEditorDefinitionExtension> extensions = new ArrayList<IEditorDefinitionExtension>();
40 private static EditorDefinitionManager INSTANCE;
42 public static synchronized EditorDefinitionManager getInstance() {
44 INSTANCE = new EditorDefinitionManager();
48 public static synchronized void dispose() {
49 if (INSTANCE != null) {
55 private EditorDefinitionManager() {
56 tracker = new ExtensionTracker();
58 // Cache defined actions
59 IExtensionPoint expt = Platform.getExtensionRegistry().getExtensionPoint(NAMESPACE, EP_NAME);
60 loadExtensions(expt.getConfigurationElements());
62 // Start tracking for new and removed extensions
63 IFilter filter = ExtensionTracker.createExtensionPointFilter(expt);
64 tracker.registerHandler(this, filter);
67 private void close() {
70 extensions = new ArrayList<IEditorDefinitionExtension>();
73 public synchronized List<IEditorDefinitionExtension> getExtensions(String perspectiveId) {
74 if (extensions == null)
75 return Arrays.asList();
76 return Collections.unmodifiableList(extensions);
79 private synchronized void loadExtensions(IConfigurationElement[] elements) {
80 for (IConfigurationElement el : elements) {
82 EditorDefinition fac = (EditorDefinition)el.createExecutableExtension("factory");
84 IEditorDefinitionExtension ext = new IEditorDefinitionExtension.Stub(fac);
86 // Start tracking the new extension object, its removal will be notified of
87 // with removeExtension(extension, Object[]).
88 tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);
91 } catch (Exception e) {
92 ErrorLogger.defaultLogError(e);
99 public void addExtension(IExtensionTracker tracker, IExtension extension) {
100 loadExtensions(extension.getConfigurationElements());
104 public synchronized void removeExtension(IExtension extension, Object[] objects) {
105 List<IEditorDefinitionExtension> newExtensions = new ArrayList<IEditorDefinitionExtension>();
107 for (Object o : objects) {
108 IEditorDefinitionExtension ext = (IEditorDefinitionExtension) o;
109 tracker.unregisterObject(extension, ext);
110 extensions.remove(ext);
114 this.extensions = newExtensions;
117 public EditorDefinition getFactoryForSuffix(String suffix) {
118 for (IEditorDefinitionExtension e : extensions) {
119 if (e.getFactory().supportSuffix(suffix)) {
120 return e.getFactory();