| /******************************************************************************* |
| * Copyright (c) 2007, 2009 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.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.core.expressions.EvaluationResult; |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.core.expressions.ExpressionInfo; |
| import org.eclipse.core.expressions.IEvaluationContext; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.ISources; |
| import org.eclipse.ui.IViewReference; |
| import org.eclipse.ui.IWorkbenchPage; |
| import org.eclipse.ui.IWorkbenchPartReference; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.handlers.HandlerUtil; |
| |
| /** |
| * Activates the most recently used editor in the current window. |
| * <p> |
| * Replacement for: ActivateEditorAction |
| * </p> |
| * |
| */ |
| public class ActivateEditorHandler extends AbstractEvaluationHandler { |
| |
| private Expression enabledWhen; |
| |
| public ActivateEditorHandler() { |
| registerEnablement(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent) |
| */ |
| public Object execute(ExecutionEvent event) throws ExecutionException { |
| IWorkbenchWindow window = HandlerUtil |
| .getActiveWorkbenchWindowChecked(event); |
| IWorkbenchPage page = window.getActivePage(); |
| if (page != null) { |
| IEditorPart part = HandlerUtil.getActiveEditor(event); |
| if (part != null) { |
| page.activate(part); |
| part.setFocus(); |
| } else { |
| IWorkbenchPartReference ref = page.getActivePartReference(); |
| if (ref instanceof IViewReference) { |
| if (((WorkbenchPage) page).isFastView((IViewReference) ref)) { |
| ((WorkbenchPage) page) |
| .toggleFastView((IViewReference) ref); |
| } |
| } |
| } |
| } |
| return null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.internal.AbstractEvaluationHandler#getEnabledWhenExpression() |
| */ |
| protected Expression getEnabledWhenExpression() { |
| if (enabledWhen == null) { |
| enabledWhen = new Expression() { |
| public EvaluationResult evaluate(IEvaluationContext context) |
| throws CoreException { |
| IWorkbenchWindow window = InternalHandlerUtil |
| .getActiveWorkbenchWindow(context); |
| if (window != null) { |
| if (window.getActivePage() != null) { |
| return EvaluationResult.TRUE; |
| } |
| } |
| return EvaluationResult.FALSE; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.expressions.Expression#collectExpressionInfo(org.eclipse.core.expressions.ExpressionInfo) |
| */ |
| public void collectExpressionInfo(ExpressionInfo info) { |
| info |
| .addVariableNameAccess(ISources.ACTIVE_WORKBENCH_WINDOW_NAME); |
| } |
| }; |
| } |
| return enabledWhen; |
| } |
| } |