1 /**

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 package org.eclipse.cdt.dsf.debug.ui;

    19 

    20 import org.eclipse.cdt.debug.ui.editors.AbstractDebugTextHover;

    21 import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor;

    22 import org.eclipse.cdt.dsf.concurrent.Query;

    23 import org.eclipse.cdt.dsf.debug.service.IExpressions;

    24 import org.eclipse.cdt.dsf.debug.service.IFormattedValues;

    25 import org.eclipse.cdt.dsf.debug.service.IExpressions.IExpressionDMContext;

    26 import org.eclipse.cdt.dsf.debug.service.IFormattedValues.FormattedValueDMContext;

    27 import org.eclipse.cdt.dsf.debug.service.IFormattedValues.FormattedValueDMData;

    28 import org.eclipse.cdt.dsf.debug.service.IStack.IFrameDMContext;

    29 import org.eclipse.cdt.dsf.internal.ui.DsfUIPlugin;

    30 import org.eclipse.cdt.dsf.service.DsfServicesTracker;

    31 import org.eclipse.cdt.dsf.service.DsfSession;

    32 import org.eclipse.core.runtime.IAdaptable;

    33 import org.eclipse.jface.viewers.IStructuredSelection;

    34 

    35 /**

    36  * An implementation of AbstractDebugTextHover using DSF services

    37  */

    38 public class DebugTextHover extends AbstractDebugTextHover {

    39 

    40 	public class GetExpressionValueQuery extends Query<FormattedValueDMData> {

    41     	private final IFrameDMContext frame;

    42     	private final String expression;

    43 		private DsfServicesTracker dsfServicesTracker;

    44 

    45         public GetExpressionValueQuery(IFrameDMContext frame, String expression, DsfServicesTracker dsfServicesTracker) {

    46             this.frame = frame;

    47 			this.expression = expression;

    48 			this.dsfServicesTracker = dsfServicesTracker;

    49         }

    50 

    51         @Override

    52         protected void execute(final DataRequestMonitor<FormattedValueDMData> rm) {

    53             DsfSession session = DsfSession.getSession(frame.getSessionId());

    54 			IExpressions expressions = dsfServicesTracker.getService(IExpressions.class);

    55     		IExpressionDMContext expressionDMC = expressions.createExpression(frame, expression);

    56     		FormattedValueDMContext formattedValueContext = expressions.getFormattedValueContext(expressionDMC, IFormattedValues.NATURAL_FORMAT);

    57         	expressions.getFormattedExpressionValue(formattedValueContext,

    58         			new DataRequestMonitor<FormattedValueDMData>(session.getExecutor(), rm) {

    59                 @Override

    60                 protected void handleSuccess() {

    61                     rm.setData(getData());

    62                     rm.done();

    63                 }

    64                 

    65                 @Override

    66         		protected void handleFailure() {

    67         			rm.done();

    68         		}

    69             });

    70         }

    71     }

    72 

    73 	protected IFrameDMContext getFrame() {

    74 		if (fSelection instanceof IStructuredSelection) {

    75 			IStructuredSelection selection = (IStructuredSelection) fSelection;

    76 			if (selection.size() == 1) {

    77 				Object element = selection.getFirstElement();

    78 				if (element instanceof IAdaptable) {

    79 					return (IFrameDMContext) ((IAdaptable) element).getAdapter(IFrameDMContext.class);

    80 				}

    81 			}

    82 		}

    83 		return null;

    84 	}

    85 

    86 	@Override

    87 	protected boolean canEvaluate() {

    88 		return getFrame() != null;

    89 	}

    90 

    91 	@Override

    92 	protected String evaluateExpression(String expression) {

    93 		IFrameDMContext frame = getFrame();

    94 		String sessionId = frame.getSessionId();

    95 		DsfServicesTracker dsfServicesTracker = new DsfServicesTracker(DsfUIPlugin.getBundleContext(), sessionId);

    96 		GetExpressionValueQuery query = new GetExpressionValueQuery(frame, expression, dsfServicesTracker);

    97 		DsfSession session = DsfSession.getSession(sessionId);

    98         session.getExecutor().execute(query);

    99         try {

   100         	FormattedValueDMData data = query.get();

   101         	if (data != null)

   102         		return data.getFormattedValue();

   103         } catch (Exception e) {

   104         }

   105         return null;

   106 	}

   107 

   108 }