| /******************************************************************************* |
| * Copyright (c) 2011, 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; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.Map; |
| import org.eclipse.core.commands.AbstractHandler; |
| 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.NotEnabledException; |
| import org.eclipse.core.commands.NotHandledException; |
| import org.eclipse.core.commands.Parameterization; |
| import org.eclipse.core.commands.ParameterizedCommand; |
| import org.eclipse.core.commands.common.NotDefinedException; |
| import org.eclipse.core.expressions.IEvaluationContext; |
| import org.eclipse.e4.core.commands.ECommandService; |
| import org.eclipse.e4.core.commands.EHandlerService; |
| import org.eclipse.e4.core.commands.internal.HandlerServiceImpl; |
| import org.eclipse.e4.core.contexts.IEclipseContext; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.ui.IWorkbench; |
| import org.eclipse.ui.commands.IElementUpdater; |
| import org.eclipse.ui.handlers.IHandlerService; |
| import org.eclipse.ui.internal.handlers.E4HandlerProxy; |
| import org.eclipse.ui.menus.UIElement; |
| |
| public class MakeHandlersGo extends AbstractHandler implements IElementUpdater { |
| |
| private IWorkbench workbench; |
| private String commandId; |
| |
| public MakeHandlersGo(IWorkbench wb, String commandId) { |
| workbench = wb; |
| this.commandId = commandId; |
| } |
| |
| /** |
| * A public version of the protected |
| * {@link #fireHandlerChanged(HandlerEvent)} method so that it can be called |
| * by a HandlerProxy. |
| * <p> |
| * See bug 367094. |
| * </p> |
| */ |
| @Override |
| public void fireHandlerChanged(HandlerEvent handlerEvent) { |
| super.fireHandlerChanged(handlerEvent); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands |
| * .ExecutionEvent) |
| */ |
| public Object execute(ExecutionEvent event) throws ExecutionException { |
| WorkbenchPlugin.log("Calling \"" + event.getCommand() //$NON-NLS-1$ |
| + "\" command directly"); //$NON-NLS-1$ |
| Object obj = event.getApplicationContext(); |
| if (obj instanceof IEvaluationContext) { |
| IHandlerService hs = (IHandlerService) workbench.getService(IHandlerService.class); |
| if (hs != null) { |
| ParameterizedCommand pcmd = generateCommand(event); |
| if (pcmd != null) { |
| Event e = null; |
| if (event.getTrigger() instanceof Event) { |
| e = (Event) event.getTrigger(); |
| } |
| try { |
| return hs.executeCommandInContext(pcmd, e, (IEvaluationContext) obj); |
| } catch (NotDefinedException e1) { |
| // Because of the expectations of 3.x, this should |
| // go nowhere |
| } catch (NotEnabledException e1) { |
| // Because of the expectations of 3.x, this should |
| // go nowhere |
| } catch (NotHandledException e1) { |
| // Because of the expectations of 3.x, this should |
| // go nowhere |
| } |
| } |
| } |
| } |
| return null; |
| } |
| |
| private ParameterizedCommand generateCommand(ExecutionEvent event) { |
| Command cmd = event.getCommand(); |
| if (event.getParameters().isEmpty()) { |
| return new ParameterizedCommand(cmd, null); |
| } |
| ArrayList<Parameterization> parms = new ArrayList<Parameterization>(); |
| Iterator i = event.getParameters().entrySet().iterator(); |
| try { |
| while (i.hasNext()) { |
| Map.Entry entry = (Map.Entry) i.next(); |
| parms.add(new Parameterization(cmd.getParameter((String) entry.getKey()), |
| (String) entry.getValue())); |
| } |
| return new ParameterizedCommand(cmd, parms.toArray(new Parameterization[parms.size()])); |
| } catch (NotDefinedException e) { |
| WorkbenchPlugin.log(e); |
| } |
| return null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.commands.AbstractHandler#isEnabled() |
| */ |
| @Override |
| public boolean isEnabled() { |
| EHandlerService hs = (EHandlerService) workbench.getService(EHandlerService.class); |
| ECommandService cs = (ECommandService) workbench.getService(ECommandService.class); |
| Command command = cs.getCommand(commandId); |
| if (hs == null) { |
| return false; |
| } |
| setBaseEnabled(hs.canExecute(new ParameterizedCommand(command, null))); |
| return super.isEnabled(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.commands.AbstractHandler#isHandled() |
| */ |
| @Override |
| public boolean isHandled() { |
| EHandlerService service = (EHandlerService) workbench.getService(EHandlerService.class); |
| if (service == null) { |
| return false; |
| } |
| IEclipseContext ctx = (IEclipseContext) workbench.getService(IEclipseContext.class); |
| Object handler = HandlerServiceImpl.lookUpHandler(ctx, commandId); |
| if (handler instanceof E4HandlerProxy) { |
| IHandler h = ((E4HandlerProxy) handler).getHandler(); |
| return h == null ? false : h.isHandled(); |
| } |
| return handler != null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.eclipse.ui.commands.IElementUpdater#updateElement(org.eclipse.ui. |
| * menus.UIElement, java.util.Map) |
| */ |
| public void updateElement(UIElement element, Map parameters) { |
| Object o = HandlerServiceImpl.lookUpHandler( |
| (IEclipseContext) workbench.getService(IEclipseContext.class), commandId); |
| // prevent infinite recursions |
| if (o != this) { |
| if (o instanceof E4HandlerProxy) { |
| o = ((E4HandlerProxy) o).getHandler(); |
| } |
| |
| if (o instanceof IElementUpdater) { |
| ((IElementUpdater) o).updateElement(element, parameters); |
| } |
| } |
| } |
| } |