| /******************************************************************************* |
| * 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.core.runtime.ISafeRunnable; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.jface.action.IMenuCreator; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Menu; |
| import org.eclipse.ui.IActionDelegate; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.IWorkbenchWindowPulldownDelegate; |
| import org.eclipse.ui.IWorkbenchWindowPulldownDelegate2; |
| import org.eclipse.ui.WorkbenchException; |
| |
| /** |
| * A workbench window pulldown action. |
| */ |
| public class WWinPluginPulldown extends WWinPluginAction { |
| |
| /** |
| * The proxy for creating the menu. There is always a menu proxy. This value |
| * can't be <code>null</code>. |
| */ |
| private final IMenuCreator menuProxy; |
| |
| private class MenuProxy implements IMenuCreator { |
| |
| /** |
| * A wrapper for loading the menu that defends against possible |
| * exceptions triggered outside of the workbench. |
| * |
| * @since 3.0 |
| */ |
| private class MenuLoader implements ISafeRunnable { |
| |
| /** |
| * The parent for the menu to be created. This value is |
| * <code>null</code> if the parent is a menu. |
| */ |
| private final Control control; |
| |
| /** |
| * The delegate from which to load the menu. |
| */ |
| private final IWorkbenchWindowPulldownDelegate delegate; |
| |
| /** |
| * The loaded menu. This value is <code>null</code> if the load |
| * failed, or if it hasn't been loaded yet. |
| */ |
| private Menu menu = null; |
| |
| /** |
| * The parent for the menu to be created. This value is |
| * <code>null</code> if the parent is a control. |
| */ |
| private final Menu parent; |
| |
| /** |
| * Constructs a new instance of <code>MenuLoader</code> |
| * |
| * @param delegate |
| * The delegate from which the menu will be loaded; this |
| * value must not be <code>null</code>. |
| * @param parent |
| * The parent of the menu to be loaded; this value must |
| * not be <code>null</code>. |
| */ |
| private MenuLoader( |
| final IWorkbenchWindowPulldownDelegate2 delegate, |
| final Menu parent) { |
| this.delegate = delegate; |
| this.parent = parent; |
| this.control = null; |
| } |
| |
| /** |
| * Constructs a new instance of <code>MenuLoader</code> |
| * |
| * @param delegate |
| * The delegate from which the menu will be loaded; this |
| * value must not be <code>null</code>. |
| * @param parent |
| * The parent of the menu to be loaded; this value must |
| * not be <code>null</code>. |
| */ |
| private MenuLoader(final IWorkbenchWindowPulldownDelegate delegate, |
| final Control parent) { |
| this.delegate = delegate; |
| this.parent = null; |
| this.control = parent; |
| } |
| |
| /** |
| * Returns the menu loaded, if any. |
| * |
| * @return the loaded menu, or <code>null</code> if none. |
| */ |
| private Menu getMenu() { |
| return menu; |
| } |
| |
| /** |
| * @see ISafeRunnable#handleException(java.lang.Throwable) |
| */ |
| public void handleException(Throwable exception) { |
| // Do nothing |
| } |
| |
| /** |
| * @see ISafeRunnable#run() |
| */ |
| public void run() throws Exception { |
| if (parent == null) { |
| menu = delegate.getMenu(control); |
| } else { |
| menu = ((IWorkbenchWindowPulldownDelegate2) delegate) |
| .getMenu(parent); |
| } |
| } |
| } |
| |
| /** |
| * @see IMenuCreator#getMenu(Control) |
| */ |
| public Menu getMenu(Control parent) { |
| IWorkbenchWindowPulldownDelegate delegate = getPulldownDelegate(); |
| if (delegate != null) { |
| final MenuLoader menuLoader = new MenuLoader(delegate, parent); |
| SafeRunner.run(menuLoader); |
| return menuLoader.getMenu(); |
| } |
| |
| return null; |
| } |
| |
| /** |
| * @see IMenuCreator#getMenu(Menu) |
| */ |
| public Menu getMenu(Menu parent) { |
| IWorkbenchWindowPulldownDelegate delegate = getPulldownDelegate(); |
| |
| if (delegate instanceof IWorkbenchWindowPulldownDelegate2) { |
| IWorkbenchWindowPulldownDelegate2 delegate2 = (IWorkbenchWindowPulldownDelegate2) delegate; |
| final MenuLoader menuLoader = new MenuLoader(delegate2, parent); |
| SafeRunner.run(menuLoader); |
| return menuLoader.getMenu(); |
| } |
| |
| return null; |
| } |
| |
| /** |
| * @see IMenuCreator#dispose() |
| */ |
| public void dispose() { |
| // do nothing |
| } |
| } |
| |
| /** |
| * Constructs a new instance of <code>WWinPluginPulldown</code>. |
| * |
| * @param actionElement |
| * The registry element from which the pulldown delegate should |
| * be created; must not be <code>null</code>. |
| * @param id |
| * The identifier of this action delegate; may be |
| * <code>null</code>. |
| * @param window |
| * The workbench window on which this pulldown should act; must |
| * not be <code>null</code>. |
| * @param style |
| * The style. |
| */ |
| public WWinPluginPulldown(IConfigurationElement actionElement, |
| IWorkbenchWindow window, String id, int style) { |
| super(actionElement, window, id, style); |
| menuProxy = new MenuProxy(); |
| setMenuCreator(menuProxy); |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on PluginAction. |
| */ |
| protected IActionDelegate validateDelegate(Object obj) |
| throws WorkbenchException { |
| if (obj instanceof IWorkbenchWindowPulldownDelegate) { |
| return (IWorkbenchWindowPulldownDelegate) obj; |
| } |
| |
| throw new WorkbenchException( |
| "Action must implement IWorkbenchWindowPulldownDelegate"); //$NON-NLS-1$ |
| } |
| |
| /** |
| * Returns the pulldown delegate. If it does not exist it is created. Can |
| * return <code>null</code> if delegate creation failed. |
| */ |
| protected IWorkbenchWindowPulldownDelegate getPulldownDelegate() { |
| IActionDelegate delegate = getDelegate(); |
| if (delegate == null) { |
| createDelegate(); |
| delegate = getDelegate(); |
| } |
| return (IWorkbenchWindowPulldownDelegate) delegate; |
| } |
| } |