| /******************************************************************************* |
| * Copyright (c) 2001, 2006 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.sse.ui.internal.extension; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.wst.sse.core.StructuredModelManager; |
| import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel; |
| import org.eclipse.wst.sse.core.internal.undo.IStructuredTextUndoManager; |
| import org.eclipse.wst.sse.ui.internal.IExtendedSimpleEditor; |
| import org.eclipse.wst.sse.ui.internal.Logger; |
| import org.eclipse.wst.sse.ui.internal.provisional.extensions.ISelfValidateEditAction; |
| |
| |
| /** |
| * Begins and ends UndoManager recording around run() and runWithEvent(...) |
| */ |
| public class ExtendedEditorActionProxy implements InvocationHandler { |
| public static Object newInstance(Object obj) { |
| Set set = new HashSet(); |
| Class clazz = obj.getClass(); |
| while (clazz != null) { |
| Class[] interfaces = clazz.getInterfaces(); |
| for (int i = 0; i < interfaces.length; i++) { |
| set.add(interfaces[i]); |
| } |
| clazz = clazz.getSuperclass(); |
| } |
| Class[] classes = new Class[set.size()]; |
| Iterator itr = set.iterator(); |
| int i = 0; |
| while (itr.hasNext()) { |
| classes[i] = (Class) itr.next(); |
| i++; |
| } |
| return Proxy.newProxyInstance(obj.getClass().getClassLoader(), classes, new ExtendedEditorActionProxy(obj)); |
| } |
| |
| private IExtendedSimpleEditor editor = null; |
| private IStructuredModel fRecorder; |
| private Object obj; |
| |
| private ExtendedEditorActionProxy(Object obj) { |
| this.obj = obj; |
| } |
| |
| private void beginRecording() { |
| IDocument document = null; |
| if (editor != null) { |
| document = editor.getDocument(); |
| if (document != null) |
| fRecorder = StructuredModelManager.getModelManager().getExistingModelForEdit(document); |
| // Prepare for Undo |
| if (fRecorder != null) { |
| IStructuredTextUndoManager um = fRecorder.getUndoManager(); |
| if (um != null) { |
| um.beginRecording(this, ((IAction) this.obj).getText(), ((IAction) this.obj).getDescription()); |
| } |
| } |
| } |
| } |
| |
| private void endRecording() { |
| if (fRecorder != null) { |
| IStructuredTextUndoManager um = fRecorder.getUndoManager(); |
| if (um != null) { |
| um.endRecording(this); |
| } |
| fRecorder.releaseFromEdit(); |
| fRecorder = null; |
| } |
| } |
| |
| /** |
| * @see java.lang.reflect.InvocationHandler#invoke(Object, Method, |
| * Object[]) |
| */ |
| public Object invoke(Object proxy, Method m, Object[] args) throws Throwable { |
| Object result = null; |
| String name = m.getName(); |
| try { |
| if (name.equals("equals")) { //$NON-NLS-1$ |
| // Workaround for JDK's bug 4652876 |
| // "equals" always returns false even if both |
| // InvocationHandler |
| // class |
| // hold the same objects |
| // See |
| // http://developer.java.sun.com/developer/bugParade/bugs/4652876.html |
| // This problem is in the IBM SDK 1.3.1 |
| // but I don't see the bug in Sun's JDK 1.4.1 (beta) |
| Object arg = args[0]; |
| return (proxy.getClass() == arg.getClass() && equals(Proxy.getInvocationHandler(arg))) ? Boolean.TRUE : Boolean.FALSE; |
| } else if (name.equals("runWithEvent") || name.equals("run")) { //$NON-NLS-1$ //$NON-NLS-2$ |
| beginRecording(); |
| if ((editor != null) && !(this.obj instanceof ISelfValidateEditAction)) { |
| |
| // TODO: cleanup validateEdit |
| // just leaving this check and following code here for transition. |
| // I assume we'll remove all need for 'validateEdit' |
| // or move to platform editor's validateState |
| |
| // IStatus status = editor.validateEdit(getDisplay().getActiveShell()); |
| // if (!status.isOK()) { |
| // return null; |
| // } |
| } |
| } else if (name.equals("setActiveExtendedEditor")) { //$NON-NLS-1$ |
| if (args[0] instanceof IExtendedSimpleEditor) { |
| editor = (IExtendedSimpleEditor) args[0]; |
| } |
| } |
| result = m.invoke(this.obj, args); |
| } catch (InvocationTargetException e) { |
| Logger.logException(e.getTargetException()); |
| //throw e.getTargetException(); |
| } catch (Exception e) { |
| Logger.logException(e); |
| if (name.equals("runWithEvent") || name.equals("run")) { //$NON-NLS-1$ //$NON-NLS-2$ |
| // only expose user-driven exceptions from "running" to the |
| // user |
| throw new RuntimeException(e.getMessage()); |
| } |
| } finally { |
| if (name.equals("runWithEvent") || name.equals("run")) { //$NON-NLS-1$ //$NON-NLS-2$ |
| endRecording(); |
| } |
| } |
| return result; |
| } |
| } |