| /******************************************************************************* |
| * Copyright (c) 2010, 2012 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.handlers; |
| |
| import java.util.Map; |
| import javax.inject.Named; |
| import org.eclipse.core.commands.Command; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.core.commands.HandlerEvent; |
| import org.eclipse.core.commands.IHandler; |
| import org.eclipse.core.commands.IHandler2; |
| import org.eclipse.core.commands.IHandlerListener; |
| import org.eclipse.core.expressions.IEvaluationContext; |
| import org.eclipse.e4.core.commands.internal.HandlerServiceImpl; |
| import org.eclipse.e4.core.contexts.IEclipseContext; |
| import org.eclipse.e4.core.di.annotations.CanExecute; |
| import org.eclipse.e4.core.di.annotations.Execute; |
| import org.eclipse.e4.core.di.annotations.Optional; |
| import org.eclipse.e4.ui.internal.workbench.Activator; |
| import org.eclipse.e4.ui.internal.workbench.Policy; |
| import org.eclipse.e4.ui.workbench.modeling.ExpressionContext; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.internal.MakeHandlersGo; |
| import org.eclipse.ui.internal.Workbench; |
| |
| /** |
| * @since 3.5 |
| * |
| */ |
| public class E4HandlerProxy implements IHandlerListener { |
| public HandlerActivation activation = null; |
| private Command command; |
| private IHandler handler; |
| |
| public E4HandlerProxy(Command command, IHandler handler) { |
| this.command = command; |
| this.handler = handler; |
| handler.addHandlerListener(this); |
| } |
| |
| @CanExecute |
| public boolean canExecute(IEclipseContext context, @Optional IEvaluationContext staticContext) { |
| if (handler instanceof IHandler2) { |
| ((IHandler2) handler).setEnabled(staticContext == null ? new ExpressionContext(context) |
| : staticContext); |
| } |
| return handler.isEnabled(); |
| } |
| |
| @Execute |
| public Object execute(IEclipseContext context, |
| @Optional @Named(HandlerServiceImpl.PARM_MAP) Map parms, @Optional Event trigger, |
| @Optional IEvaluationContext staticContext) throws ExecutionException { |
| Activator.trace(Policy.DEBUG_CMDS, "execute " + command + " and " //$NON-NLS-1$ //$NON-NLS-2$ |
| + handler + " with: " + context, null); //$NON-NLS-1$ |
| IEvaluationContext appContext = staticContext; |
| if (appContext == null) { |
| appContext = new ExpressionContext(context); |
| } |
| ExecutionEvent event = new ExecutionEvent(command, parms, trigger, appContext); |
| return handler.execute(event); |
| } |
| |
| public IHandler getHandler() { |
| return handler; |
| } |
| |
| public void handlerChanged(HandlerEvent handlerEvent) { |
| IHandler handler = command.getHandler(); |
| if (handler instanceof MakeHandlersGo) { |
| IEclipseContext appContext = ((Workbench) PlatformUI.getWorkbench()).getApplication() |
| .getContext(); |
| if (HandlerServiceImpl.lookUpHandler(appContext, command.getId()) == this) { |
| ((MakeHandlersGo) handler).fireHandlerChanged(handlerEvent); |
| } |
| } |
| } |
| } |