Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.editors.win32 / src / org / simantics / editors / win32 / EditorDefinitionManager.java

diff --git a/bundles/org.simantics.editors.win32/src/org/simantics/editors/win32/EditorDefinitionManager.java b/bundles/org.simantics.editors.win32/src/org/simantics/editors/win32/EditorDefinitionManager.java
new file mode 100644 (file)
index 0000000..3d54756
--- /dev/null
+++ b/bundles/org.simantics.editors.win32/src/org/simantics/editors/win32/EditorDefinitionManager.java
@@ -0,0 +1,127 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.editors.win32;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Arrays;\r
+import java.util.Collections;\r
+import java.util.List;\r
+\r
+import org.eclipse.core.runtime.IConfigurationElement;\r
+import org.eclipse.core.runtime.IExtension;\r
+import org.eclipse.core.runtime.IExtensionPoint;\r
+import org.eclipse.core.runtime.Platform;\r
+import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;\r
+import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;\r
+import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;\r
+import org.eclipse.core.runtime.dynamichelpers.IFilter;\r
+import org.simantics.editors.win32.ole.EditorDefinition;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+\r
+public class EditorDefinitionManager implements IExtensionChangeHandler {\r
+\r
+    private final static String                           NAMESPACE  = Activator.PLUGIN_ID;\r
+\r
+    private final static String                           EP_NAME    = "editorDefinition";\r
+\r
+    private ExtensionTracker                              tracker;\r
+\r
+    private List<IEditorDefinitionExtension> extensions = new ArrayList<IEditorDefinitionExtension>();\r
+\r
+    private static EditorDefinitionManager       INSTANCE;\r
+\r
+    public static synchronized EditorDefinitionManager getInstance() {\r
+        if (INSTANCE == null)\r
+            INSTANCE = new EditorDefinitionManager();\r
+        return INSTANCE;\r
+    }\r
+\r
+    public static synchronized void dispose() {\r
+        if (INSTANCE != null) {\r
+            INSTANCE.close();\r
+            INSTANCE = null;\r
+        }\r
+    }\r
+\r
+    private EditorDefinitionManager() {\r
+        tracker = new ExtensionTracker();\r
+\r
+        // Cache defined actions\r
+        IExtensionPoint expt = Platform.getExtensionRegistry().getExtensionPoint(NAMESPACE, EP_NAME);\r
+        loadExtensions(expt.getConfigurationElements());\r
+\r
+        // Start tracking for new and removed extensions\r
+        IFilter filter = ExtensionTracker.createExtensionPointFilter(expt);\r
+        tracker.registerHandler(this, filter);\r
+    }\r
+\r
+    private void close() {\r
+        tracker.close();\r
+        tracker = null;\r
+        extensions = new ArrayList<IEditorDefinitionExtension>();\r
+    }\r
+\r
+    public synchronized List<IEditorDefinitionExtension> getExtensions(String perspectiveId) {\r
+        if (extensions == null)\r
+            return Arrays.asList();\r
+        return Collections.unmodifiableList(extensions);\r
+    }\r
+\r
+    private synchronized void loadExtensions(IConfigurationElement[] elements) {\r
+        for (IConfigurationElement el : elements) {\r
+               try {\r
+                       EditorDefinition fac = (EditorDefinition)el.createExecutableExtension("factory");\r
+            \r
+                       IEditorDefinitionExtension ext = new IEditorDefinitionExtension.Stub(fac);\r
+\r
+               // Start tracking the new extension object, its removal will be notified of\r
+               // with removeExtension(extension, Object[]).\r
+               tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);\r
+\r
+               extensions.add(ext);\r
+               } catch (Exception e) {\r
+                       ErrorLogger.defaultLogError(e);\r
+               }\r
+        }\r
+    }\r
+\r
+\r
+    @Override\r
+    public void addExtension(IExtensionTracker tracker, IExtension extension) {\r
+        loadExtensions(extension.getConfigurationElements());\r
+    }\r
+\r
+    @Override\r
+    public synchronized void removeExtension(IExtension extension, Object[] objects) {\r
+        List<IEditorDefinitionExtension> newExtensions = new ArrayList<IEditorDefinitionExtension>();\r
+\r
+        for (Object o : objects) {\r
+            IEditorDefinitionExtension ext = (IEditorDefinitionExtension) o;\r
+            tracker.unregisterObject(extension, ext);\r
+            extensions.remove(ext);\r
+        }\r
+\r
+        // Atomic assignment\r
+        this.extensions = newExtensions;\r
+    }\r
+    \r
+    public EditorDefinition getFactoryForSuffix(String suffix) {\r
+       for (IEditorDefinitionExtension e : extensions) {\r
+               if (e.getFactory().supportSuffix(suffix)) {\r
+                       return e.getFactory();\r
+               }\r
+               \r
+       }\r
+       return null;            \r
+    }\r
+\r
+}\r