| /******************************************************************************* |
| * Copyright (c) 2005, 2007 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 |
| * Pawel Piech - Bug 210023: Another NPE in DefaultWatchExpressionModelProxy |
| *******************************************************************************/ |
| package org.eclipse.debug.internal.ui.viewers.update; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.debug.core.ILaunch; |
| import org.eclipse.debug.core.model.IDebugElement; |
| import org.eclipse.debug.core.model.IWatchExpression; |
| import org.eclipse.debug.internal.ui.DebugUIPlugin; |
| import org.eclipse.debug.ui.DebugUITools; |
| import org.eclipse.debug.ui.contexts.DebugContextEvent; |
| import org.eclipse.debug.ui.contexts.IDebugContextListener; |
| import org.eclipse.debug.ui.contexts.IDebugContextService; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.progress.UIJob; |
| |
| /** |
| * Model proxy for the expressions view |
| * |
| * @see org.eclipse.debug.internal.ui.views.expression.ExpressionView |
| * @see org.eclipse.debug.internal.ui.model.elements.ExpressionContentProvider |
| * @see org.eclipse.debug.internal.ui.model.elements.ExpressionsViewMementoProvider |
| * |
| * @since 3.2 |
| */ |
| public class DefaultWatchExpressionModelProxy extends DefaultExpressionModelProxy implements IDebugContextListener { |
| |
| private IWorkbenchWindow fWindow; |
| |
| public DefaultWatchExpressionModelProxy(IWatchExpression expression) { |
| super(expression); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.AbstractModelProxy#installed(org.eclipse.jface.viewers.Viewer) |
| */ |
| public void installed(final Viewer viewer) { |
| super.installed(viewer); |
| UIJob job = new UIJob("install watch expression model proxy") { //$NON-NLS-1$ |
| public IStatus runInUIThread(IProgressMonitor monitor) { |
| if (!isDisposed()) { |
| IWorkbenchWindow[] workbenchWindows = PlatformUI.getWorkbench().getWorkbenchWindows(); |
| for (int i = 0; i < workbenchWindows.length; i++) { |
| IWorkbenchWindow window = workbenchWindows[i]; |
| if (viewer.getControl().getShell().equals(window.getShell())) { |
| fWindow = window; |
| break; |
| } |
| } |
| if (fWindow == null) { |
| fWindow = DebugUIPlugin.getActiveWorkbenchWindow(); |
| } |
| IDebugContextService contextService = DebugUITools.getDebugContextManager().getContextService(fWindow); |
| contextService.addDebugContextListener(DefaultWatchExpressionModelProxy.this); |
| ISelection activeContext = contextService.getActiveContext(); |
| if (activeContext != null) { |
| contextActivated(activeContext); |
| } |
| } |
| return Status.OK_STATUS; |
| } |
| |
| }; |
| job.setSystem(true); |
| job.schedule(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.update.DefaultExpressionModelProxy#dispose() |
| */ |
| public synchronized void dispose() { |
| super.dispose(); |
| if (fWindow != null) { |
| DebugUITools.getDebugContextManager().getContextService(fWindow).removeDebugContextListener(this); |
| fWindow = null; |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.update.EventHandlerModelProxy#createEventHandlers() |
| */ |
| protected DebugEventHandler[] createEventHandlers() { |
| return new DebugEventHandler[]{new ExpressionEventHandler(this)}; |
| } |
| |
| /** |
| * Handles the activation of the specified debug context (i.e. the selection) |
| * @param selection the specified context to 'activate' |
| */ |
| protected void contextActivated(ISelection selection) { |
| if (fWindow != null) { |
| if (selection instanceof IStructuredSelection) { |
| IDebugElement context = null; |
| IStructuredSelection ss = (IStructuredSelection)selection; |
| if (ss.size() < 2) { |
| Object object = ss.getFirstElement(); |
| if (object instanceof IDebugElement) { |
| context= (IDebugElement) object; |
| } else if (object instanceof ILaunch) { |
| context= ((ILaunch) object).getDebugTarget(); |
| } |
| } |
| IWatchExpression expression = (IWatchExpression)getExpression(); |
| if (expression != null){ |
| expression.setExpressionContext(context); |
| } |
| } |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.contexts.IDebugContextListener#debugContextChanged(org.eclipse.debug.ui.contexts.DebugContextEvent) |
| */ |
| public void debugContextChanged(DebugContextEvent event) { |
| if ((event.getFlags() & DebugContextEvent.ACTIVATED) > 0) { |
| contextActivated(event.getContext()); |
| } |
| } |
| |
| } |