| /******************************************************************************* |
| * Copyright (c) 2010, 2014 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.e4.ui.workbench.renderers.swt; |
| |
| import java.lang.reflect.Method; |
| import javax.inject.Inject; |
| import org.eclipse.core.runtime.ISafeRunnable; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.e4.core.contexts.IEclipseContext; |
| import org.eclipse.e4.core.services.log.Logger; |
| import org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer; |
| import org.eclipse.e4.ui.internal.workbench.swt.Policy; |
| import org.eclipse.e4.ui.internal.workbench.swt.WorkbenchSWTActivator; |
| import org.eclipse.e4.ui.model.application.ui.menu.MMenu; |
| import org.eclipse.e4.ui.model.application.ui.menu.MPopupMenu; |
| import org.eclipse.e4.ui.workbench.modeling.EModelService; |
| import org.eclipse.jface.action.MenuManager; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.swt.widgets.Listener; |
| import org.eclipse.swt.widgets.Menu; |
| import org.eclipse.swt.widgets.Widget; |
| |
| public class MenuManagerServiceFilter implements Listener { |
| public static final String NUL_MENU_ITEM = "(None Applicable)"; //$NON-NLS-1$ |
| |
| private static final String TMP_ORIGINAL_CONTEXT = "MenuServiceFilter.original.context"; //$NON-NLS-1$ |
| |
| private static void trace(String msg, Widget menu, MMenu menuModel) { |
| WorkbenchSWTActivator.trace(Policy.MENUS, msg + ": " + menu + ": " //$NON-NLS-1$ //$NON-NLS-2$ |
| + menuModel, null); |
| } |
| |
| private static Method aboutToShow; |
| |
| public static Method getAboutToShow() { |
| if (aboutToShow == null) { |
| try { |
| aboutToShow = MenuManager.class |
| .getDeclaredMethod("handleAboutToShow"); //$NON-NLS-1$ |
| aboutToShow.setAccessible(true); |
| } catch (SecurityException e) { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } catch (NoSuchMethodException e) { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } |
| } |
| return aboutToShow; |
| } |
| |
| @Inject |
| private Logger logger; |
| |
| @Inject |
| EModelService modelService; |
| |
| @Override |
| public void handleEvent(final Event event) { |
| // wrap the handling in a SafeRunner so that exceptions do not prevent |
| // the menu from being shown |
| SafeRunner.run(new ISafeRunnable() { |
| @Override |
| public void handleException(Throwable e) { |
| if (e instanceof Error) { |
| // errors are deadly, we shouldn't ignore these |
| throw (Error) e; |
| } else { |
| // log exceptions otherwise |
| if (logger != null) { |
| logger.error(e); |
| } |
| } |
| } |
| |
| @Override |
| public void run() throws Exception { |
| safeHandleEvent(event); |
| } |
| }); |
| } |
| |
| private void safeHandleEvent(Event event) { |
| if (!(event.widget instanceof Menu)) { |
| return; |
| } |
| final Menu menu = (Menu) event.widget; |
| if (event.type == SWT.Dispose) { |
| trace("handleMenu.Dispose", menu, null); //$NON-NLS-1$ |
| cleanUp(menu); |
| } |
| Object obj = menu.getData(AbstractPartRenderer.OWNING_ME); |
| if (obj == null && menu.getParentItem() != null) { |
| obj = menu.getParentItem().getData(AbstractPartRenderer.OWNING_ME); |
| } |
| if (obj instanceof MPopupMenu) { |
| handleContextMenu(event, menu, (MPopupMenu) obj); |
| } else if (obj instanceof MMenu) { |
| handleMenu(event, menu, (MMenu) obj); |
| } |
| } |
| |
| private void handleMenu(final Event event, final Menu menu, |
| final MMenu menuModel) { |
| if ((menu.getStyle() & SWT.BAR) != 0) { |
| // don't process the menu bar, it's not fair :-) |
| return; |
| } |
| switch (event.type) { |
| case SWT.Show: |
| cleanUp(menu); |
| showMenu(event, menu, menuModel); |
| break; |
| case SWT.Hide: |
| // TODO we'll clean up on show |
| break; |
| } |
| } |
| |
| public void showMenu(final Event event, final Menu menu, |
| final MMenu menuModel) { |
| // System.err.println("showMenu: " + menuModel + "\n\t" + menu); |
| } |
| |
| private void handleContextMenu(final Event event, final Menu menu, |
| final MPopupMenu menuModel) { |
| switch (event.type) { |
| case SWT.Show: |
| cleanUp(menu); |
| showPopup(event, menu, menuModel); |
| break; |
| case SWT.Hide: |
| hidePopup(event, menu, menuModel); |
| break; |
| } |
| } |
| |
| public void hidePopup(Event event, Menu menu, MPopupMenu menuModel) { |
| // System.err.println("hidePopup: " + menuModel + "\n\t" + menu); |
| final IEclipseContext popupContext = menuModel.getContext(); |
| final IEclipseContext originalChild = (IEclipseContext) popupContext |
| .get(TMP_ORIGINAL_CONTEXT); |
| popupContext.remove(TMP_ORIGINAL_CONTEXT); |
| if (!menu.isDisposed()) { |
| menu.getDisplay().asyncExec(() -> { |
| if (originalChild == null) { |
| popupContext.deactivate(); |
| } else { |
| originalChild.activate(); |
| } |
| }); |
| } |
| } |
| |
| public void showPopup(final Event event, final Menu menu, |
| final MPopupMenu menuModel) { |
| // System.err.println("showPopup: " + menuModel + "\n\t" + menu); |
| // we need some context foolery here |
| final IEclipseContext popupContext = menuModel.getContext(); |
| final IEclipseContext parentContext = popupContext.getParent(); |
| final IEclipseContext originalChild = parentContext.getActiveChild(); |
| popupContext.activate(); |
| popupContext.set(TMP_ORIGINAL_CONTEXT, originalChild); |
| |
| } |
| |
| public void cleanUp(final Menu menu) { |
| // System.err.println("cleanUp: " + menu); |
| } |
| |
| public void dispose() { |
| // System.err.println("dispose"); |
| } |
| } |