| /******************************************************************************* |
| * Copyright (c) 2000, 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 |
| *******************************************************************************/ |
| package org.eclipse.ui.internal; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.ui.IActionDelegate; |
| import org.eclipse.ui.IEditorActionDelegate; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.WorkbenchException; |
| |
| /** |
| * Extends PartPluginAction for usage in editor parts. Objects |
| * of this class are created by reading the registry (extension point "editorActions"). |
| */ |
| public final class EditorPluginAction extends PartPluginAction { |
| private IEditorPart currentEditor; |
| |
| /** |
| * This class adds the requirement that action delegates |
| * loaded on demand implement IViewActionDelegate |
| */ |
| public EditorPluginAction(IConfigurationElement actionElement, |
| IEditorPart part, String id, int style) { |
| super(actionElement, id, style); |
| if (part != null) { |
| editorChanged(part); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on PluginAction. |
| */ |
| protected IActionDelegate validateDelegate(Object obj) |
| throws WorkbenchException { |
| if (obj instanceof IEditorActionDelegate) { |
| return (IEditorActionDelegate) obj; |
| } else { |
| throw new WorkbenchException( |
| "Action must implement IEditorActionDelegate"); //$NON-NLS-1$ |
| } |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on PluginAction. |
| */ |
| protected void initDelegate() { |
| super.initDelegate(); |
| ((IEditorActionDelegate) getDelegate()).setActiveEditor(this, |
| currentEditor); |
| } |
| |
| /** |
| * Handles editor change by re-registering for selection |
| * changes and updating IEditorActionDelegate. |
| */ |
| public void editorChanged(IEditorPart part) { |
| if (currentEditor != null) { |
| unregisterSelectionListener(currentEditor); |
| } |
| |
| currentEditor = part; |
| |
| if (getDelegate() == null && isOkToCreateDelegate()) { |
| createDelegate(); |
| } |
| if (getDelegate() != null) { |
| ((IEditorActionDelegate) getDelegate()).setActiveEditor(this, part); |
| } |
| |
| if (part != null) { |
| registerSelectionListener(part); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.internal.PluginAction#dispose() |
| */ |
| public void dispose() { |
| if (currentEditor != null) { |
| unregisterSelectionListener(currentEditor); |
| currentEditor = null; |
| } |
| super.dispose(); |
| } |
| } |