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