From c2605537bc1c5046d539829aba24c8ac14fa5777 Mon Sep 17 00:00:00 2001
From: Marc Dumais <marc.dumais@ericsson.com>
Date: Thu, 13 Dec 2012 13:21:13 -0500
Subject: [PATCH] Bug 365776 - [breakpoints] Add breakpoint action to toggle
 reverse debugging.

Change-Id: I065297685fefba76df7ad40c578a0ce5d0c40fba
Reviewed-on: https://git.eclipse.org/r/8982
IP-Clean: Marc Khouzam <marc.khouzam@ericsson.com>
Tested-by: Marc Khouzam <marc.khouzam@ericsson.com>
Reviewed-by: Marc Khouzam <marc.khouzam@ericsson.com>
---
 .../IReverseDebugEnabler.java                 |  37 ++++
 .../plugin.properties                         |   2 +
 debug/org.eclipse.cdt.debug.ui/plugin.xml     |  16 ++
 .../breakpointactions/ReverseDebugAction.java | 193 ++++++++++++++++++
 .../ReverseDebugActionComposite.java          |  58 ++++++
 .../ReverseDebugActionPage.java               |  42 ++++
 .../ui/breakpointactions/messages.properties  |  12 +-
 .../actions/BreakpointActionAdapter.java      |   7 +-
 .../actions/MIReverseDebugEnabler.java        |  89 ++++++++
 9 files changed, 454 insertions(+), 2 deletions(-)
 create mode 100644 debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/core/breakpointactions/IReverseDebugEnabler.java
 create mode 100644 debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugAction.java
 create mode 100644 debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugActionComposite.java
 create mode 100644 debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugActionPage.java
 create mode 100644 dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/breakpoint/actions/MIReverseDebugEnabler.java

diff --git a/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/core/breakpointactions/IReverseDebugEnabler.java b/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/core/breakpointactions/IReverseDebugEnabler.java
new file mode 100644
index 00000000000..0388be9291b
--- /dev/null
+++ b/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/core/breakpointactions/IReverseDebugEnabler.java
@@ -0,0 +1,37 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2012 Nokia 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:
+ *     Marc Dumais (Ericsson) - initial implementation
+ *******************************************************************************/
+
+package org.eclipse.cdt.debug.core.breakpointactions;
+
+/**
+ * @since 7.3
+ */
+public interface IReverseDebugEnabler {
+	
+	/**
+	 * Toggles the state of the reverse debugging mode.
+	 * @throws Exception
+	 */
+	void toggle() throws Exception;
+	
+	/**
+	 * Enables the reverse debugging mode.  No effect if already enabled.
+	 * @throws Exception
+	 */
+	void enable() throws Exception;
+	
+	/**
+	 * Disables the reverse debugging mode.  No effect if it's not enabled.
+	 * @throws Exception
+	 */
+	void disable() throws Exception;
+	
+}
diff --git a/debug/org.eclipse.cdt.debug.ui/plugin.properties b/debug/org.eclipse.cdt.debug.ui/plugin.properties
index a68c817bb15..f2df720999c 100644
--- a/debug/org.eclipse.cdt.debug.ui/plugin.properties
+++ b/debug/org.eclipse.cdt.debug.ui/plugin.properties
@@ -11,6 +11,7 @@
 #     Patrick Chuong (Texas Instruments) - Pin and Clone Supports (Bug 331781)
 #     Dobrin Alexiev (Texas Instruments) - initial API and implementation (bug 336876)
 #     Marc Khouzam (Ericsson) - Added support for connect command (Bug 365601)
+#     Marc Dumais (Ericsson) - Added support for reverse debug action (Bug 365776)
 ###############################################################################
 
 pluginName=C/C++ Development Tools Debugger UI
@@ -157,6 +158,7 @@ SoundAction.name=Sound Action
 LogAction.name=Log Action
 ResumeAction.name=Resume Action
 ExternalToolAction.name=External Tool Action
+ReverseDebugAction.name=Reverse Debug Action
 
 # Breakpoint Types
 breapointType.label=Type
diff --git a/debug/org.eclipse.cdt.debug.ui/plugin.xml b/debug/org.eclipse.cdt.debug.ui/plugin.xml
index d1ae7a9b7c4..fa6769bbf67 100644
--- a/debug/org.eclipse.cdt.debug.ui/plugin.xml
+++ b/debug/org.eclipse.cdt.debug.ui/plugin.xml
@@ -1710,6 +1710,14 @@
             class="org.eclipse.cdt.debug.ui.breakpointactions.ExternalToolAction"
             id="org.eclipse.cdt.debug.ui.breakpointactions.ExternalToolAction"/>
    </extension>
+  <extension
+        point="org.eclipse.cdt.debug.core.BreakpointActionType">
+     <actionType
+           class="org.eclipse.cdt.debug.ui.breakpointactions.ReverseDebugAction"
+           id="org.eclipse.cdt.debug.ui.breakpointactions.ReverseDebugAction"
+           name="%ReverseDebugAction.name">
+     </actionType>
+  </extension>
  <extension
          point="org.eclipse.cdt.debug.ui.BreakpointActionPage">
       <actionPage
@@ -1740,6 +1748,14 @@
             id="org.eclipse.cdt.debug.ui.breakpointactions.ExternalToolActionPage"
             actionType="org.eclipse.cdt.debug.ui.breakpointactions.ExternalToolAction"/>
    </extension>
+  <extension
+        point="org.eclipse.cdt.debug.ui.BreakpointActionPage">
+     <actionPage
+           actionType="org.eclipse.cdt.debug.ui.breakpointactions.ReverseDebugAction"
+           class="org.eclipse.cdt.debug.ui.breakpointactions.ReverseDebugActionPage"
+           id="org.eclipse.cdt.debug.ui.breakpointactions.ReverseDebugActionPage">
+     </actionPage>
+  </extension>
 
 	<extension point="org.eclipse.debug.ui.detailPaneFactories">
       	<detailFactories
diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugAction.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugAction.java
new file mode 100644
index 00000000000..02ce0ecc24c
--- /dev/null
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugAction.java
@@ -0,0 +1,193 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2012 Nokia 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:
+ *     Ericsson - initial implementation
+ *******************************************************************************/
+package org.eclipse.cdt.debug.ui.breakpointactions;
+
+import java.io.ByteArrayOutputStream;
+import java.io.StringReader;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+
+import org.eclipse.cdt.debug.core.CDIDebugModel;
+import org.eclipse.cdt.debug.core.breakpointactions.AbstractBreakpointAction;
+import org.eclipse.cdt.debug.core.breakpointactions.IReverseDebugEnabler;
+import org.eclipse.cdt.debug.internal.core.ICDebugInternalConstants;
+import org.eclipse.cdt.debug.internal.ui.IInternalCDebugUIConstants;
+import org.eclipse.cdt.debug.ui.CDebugUIPlugin;
+import org.eclipse.core.runtime.IAdaptable;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.MultiStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.debug.core.model.IBreakpoint;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.xml.sax.InputSource;
+import org.xml.sax.helpers.DefaultHandler;
+
+
+/**
+ * Implements the reverse debug breakpoint action
+ *   
+ *@since 7.3
+ */
+public class ReverseDebugAction extends AbstractBreakpointAction{
+	/**
+	 * The available reverse debug action modes: enable, disable and toggle.
+	 */
+	public static enum REVERSE_DEBUG_ACTIONS_ENUM { 
+		
+		ENABLE, DISABLE, TOGGLE;
+			
+		/**
+		 * @param index
+		 * @return the enum value for the given index
+		 */
+		public static REVERSE_DEBUG_ACTIONS_ENUM getValue(int index) {
+			return REVERSE_DEBUG_ACTIONS_ENUM.values()[index];
+		}
+	};
+	private REVERSE_DEBUG_ACTIONS_ENUM fOperation;
+	
+	/**
+	 * @return the currently configured reverse debug mode, for this BP action
+	 */
+	public REVERSE_DEBUG_ACTIONS_ENUM getOperation() {
+		return fOperation;
+	}
+
+	/**
+	 * Sets the currently configured reverse debug mode, for this BP action
+	 * @param operation
+	 */
+	public void setOperation(REVERSE_DEBUG_ACTIONS_ENUM operation) {
+		this.fOperation = operation;
+	}
+
+	@Override
+	public IStatus execute(IBreakpoint breakpoint, IAdaptable context, IProgressMonitor monitor) {
+		IStatus errorStatus = null;
+		
+		IReverseDebugEnabler enabler = (IReverseDebugEnabler) context.getAdapter(IReverseDebugEnabler.class);
+		if (enabler != null) {
+			try {
+				switch (fOperation) {
+				case TOGGLE:
+					enabler.toggle();
+					break;
+				case ENABLE:
+					enabler.enable();
+					break;
+				case DISABLE:
+					enabler.disable();
+					break;
+				}
+				
+			} catch (Exception e) {
+				errorStatus = new Status( IStatus.ERROR, CDIDebugModel.getPluginIdentifier(), ICDebugInternalConstants.STATUS_CODE_ERROR, e.getMessage(), e );
+			}
+		}
+		else
+			errorStatus = new Status( IStatus.ERROR, CDebugUIPlugin.getUniqueIdentifier(),  IInternalCDebugUIConstants.INTERNAL_ERROR, Messages.getString("ReverseDebugAction.error.0"), null ); //$NON-NLS-1$
+
+		if (errorStatus != null) {
+			MultiStatus ms = new MultiStatus( CDIDebugModel.getPluginIdentifier(), ICDebugInternalConstants.STATUS_CODE_ERROR, Messages.getString("ReverseDebugAction.error.1"), null ); //$NON-NLS-1$
+			ms.add( errorStatus);
+			errorStatus = ms;			
+		} else {
+			errorStatus = monitor.isCanceled() ? Status.CANCEL_STATUS : Status.OK_STATUS;
+		}
+
+		return errorStatus;
+	}
+
+	@Override
+	public String getMemento() {
+		String reverseDebugData = ""; //$NON-NLS-1$
+
+		DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
+		DocumentBuilder docBuilder = null;
+		try {
+			docBuilder = dfactory.newDocumentBuilder();
+			Document doc = docBuilder.newDocument();
+
+			Element rootElement = doc.createElement("reverseDebugData"); //$NON-NLS-1$
+			rootElement.setAttribute("operation", fOperation.toString()); //$NON-NLS-1$
+
+			doc.appendChild(rootElement);
+
+			ByteArrayOutputStream s = new ByteArrayOutputStream();
+
+			TransformerFactory factory = TransformerFactory.newInstance();
+			Transformer transformer = factory.newTransformer();
+			transformer.setOutputProperty(OutputKeys.METHOD, "xml"); //$NON-NLS-1$
+			transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //$NON-NLS-1$
+
+			DOMSource source = new DOMSource(doc);
+			StreamResult outputTarget = new StreamResult(s);
+			transformer.transform(source, outputTarget);
+
+			reverseDebugData = s.toString("UTF8"); //$NON-NLS-1$
+
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		return reverseDebugData;
+
+	}
+
+	@Override
+	public void initializeFromMemento(String data) {
+		Element root = null;
+		DocumentBuilder parser;
+		try {
+			parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
+			parser.setErrorHandler(new DefaultHandler());
+			root = parser.parse(new InputSource(new StringReader(data))).getDocumentElement();
+			String value = root.getAttribute("operation"); //$NON-NLS-1$
+			if (value == null)
+				throw new Exception();
+			fOperation = REVERSE_DEBUG_ACTIONS_ENUM.valueOf(value);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+
+	}
+
+	@Override
+	public String getDefaultName() {
+		return Messages.getString("ReverseDebugAction.UntitledName");  //$NON-NLS-1$
+	}
+
+	@Override
+	public String getSummary() {
+		// get translated operation
+		String operation = Messages.getString("ReverseDebugAction."+fOperation.toString().toLowerCase()); //$NON-NLS-1$
+		
+		return operation + " " + Messages.getString("ReverseDebugAction.Summary"); //$NON-NLS-1$ //$NON-NLS-2$
+	}
+
+	@Override
+	public String getTypeName() {
+		return Messages.getString("ReverseDebugAction.TypeName"); //$NON-NLS-1$
+	}
+
+	@Override
+	public String getIdentifier() {
+		return "org.eclipse.cdt.debug.ui.breakpointactions.ReverseDebugAction"; //$NON-NLS-1$
+	}
+
+}
diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugActionComposite.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugActionComposite.java
new file mode 100644
index 00000000000..8a859710d16
--- /dev/null
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugActionComposite.java
@@ -0,0 +1,58 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2012 Nokia 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:
+ *     Ericsson - initial implementation
+ *******************************************************************************/
+package org.eclipse.cdt.debug.ui.breakpointactions;
+
+import org.eclipse.cdt.debug.ui.breakpointactions.ReverseDebugAction.REVERSE_DEBUG_ACTIONS_ENUM;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Combo;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Label;
+
+
+/**
+ * @since 7.3
+ */
+public class ReverseDebugActionComposite  extends Composite {
+	private Combo combo;
+	
+	public ReverseDebugActionComposite(Composite parent, int style, ReverseDebugActionPage page) {
+		super(parent, style);
+		final GridLayout gridLayout = new GridLayout();
+		gridLayout.numColumns = 3;
+		setLayout(gridLayout);
+		
+		final Label reverseDebugActionLabel = new Label(this, SWT.NONE);
+		reverseDebugActionLabel.setText(Messages.getString("ReverseDebugActionComposite.label")); //$NON-NLS-1$
+		
+		// combo widget that lets the user select which reverse debug action to set
+		combo = new Combo(this, SWT.READ_ONLY);
+		combo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
+		
+		// add the available reverse debug actions to the combo drop-down list
+		for(REVERSE_DEBUG_ACTIONS_ENUM elem : REVERSE_DEBUG_ACTIONS_ENUM.values()) {
+			String option = elem.toString().toLowerCase();
+			combo.add(Messages.getString("ReverseDebugAction."+option)); //$NON-NLS-1$
+		}
+		combo.select(0);
+	}
+	
+	/**
+	 * @return The currently selected reverse debug action
+	 */
+	public REVERSE_DEBUG_ACTIONS_ENUM getOperation() {
+		int index = combo.getSelectionIndex();
+
+		return REVERSE_DEBUG_ACTIONS_ENUM.getValue(index);
+	}
+	
+}
diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugActionPage.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugActionPage.java
new file mode 100644
index 00000000000..aeab4de2aee
--- /dev/null
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/ReverseDebugActionPage.java
@@ -0,0 +1,42 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2012 Nokia 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:
+ *     Ericsson - initial implementation
+ *******************************************************************************/
+package org.eclipse.cdt.debug.ui.breakpointactions;
+
+import org.eclipse.cdt.debug.core.breakpointactions.IBreakpointAction;
+import org.eclipse.core.runtime.PlatformObject;
+import org.eclipse.swt.widgets.Composite;
+
+/**
+ *@since 7.3
+ */
+public class ReverseDebugActionPage extends PlatformObject implements IBreakpointActionPage{
+	
+	private ReverseDebugActionComposite reverseDebugActionComposite;
+	private ReverseDebugAction reverseDebugAction;
+
+	@Override
+	public void actionDialogCanceled() {
+	}
+
+	@Override
+	public void actionDialogOK() {
+		reverseDebugAction.setOperation(reverseDebugActionComposite.getOperation());
+	}
+
+	@Override
+	public Composite createComposite(IBreakpointAction action,
+			Composite composite, int style) {
+		reverseDebugAction = (ReverseDebugAction) action;
+		reverseDebugActionComposite = new ReverseDebugActionComposite(composite, style, this);
+		return reverseDebugActionComposite;
+	}
+
+}
diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/messages.properties b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/messages.properties
index 4bb871be4f6..e8472f47454 100644
--- a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/messages.properties
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/breakpointactions/messages.properties
@@ -1,5 +1,5 @@
 ###############################################################################
-# Copyright (c) 2005, 2007 Nokia
+# Copyright (c) 2005, 2012 Nokia
 # 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
@@ -60,3 +60,13 @@ ResumeActionComposite.Seconds=seconds
 ResumeAction.TypeName=Resume Action
 ResumeAction.error.0=IResumeActionEnabler not registered in context.
 ResumeAction.error.1=Could not resume. 
+
+ReverseDebugAction.UntitledName=Untitled Rev Debug Action
+ReverseDebugAction.TypeName=Rev Debug Action
+ReverseDebugActionComposite.label=Select Reverse Debugging Action
+ReverseDebugAction.Summary= reverse debugging
+ReverseDebugAction.error.0=IReverseToggleEnabler not registered in context.
+ReverseDebugAction.error.1=Could not do reverse debug operation
+ReverseDebugAction.enable=Enable
+ReverseDebugAction.disable=Disable
+ReverseDebugAction.toggle=Toggle
diff --git a/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/breakpoint/actions/BreakpointActionAdapter.java b/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/breakpoint/actions/BreakpointActionAdapter.java
index aa2861b5eb5..65776609cee 100644
--- a/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/breakpoint/actions/BreakpointActionAdapter.java
+++ b/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/breakpoint/actions/BreakpointActionAdapter.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2008, 2010 Ericsson and others.
+ * Copyright (c) 2008, 2012 Ericsson 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
@@ -7,12 +7,14 @@
  *
  * Contributors:
  *     Ericsson - Initial API and implementation
+ *     Marc Dumais (Ericsson) - Added support for reverse debug action (Bug 365776)
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.mi.service.breakpoint.actions;
 
 import org.eclipse.cdt.debug.core.breakpointactions.ILogActionEnabler;
 import org.eclipse.cdt.debug.core.breakpointactions.IResumeActionEnabler;
+import org.eclipse.cdt.debug.core.breakpointactions.IReverseDebugEnabler;
 import org.eclipse.cdt.dsf.concurrent.DsfExecutor;
 import org.eclipse.cdt.dsf.datamodel.IDMContext;
 import org.eclipse.cdt.dsf.service.DsfServicesTracker;
@@ -42,6 +44,9 @@ public class BreakpointActionAdapter implements IAdaptable {
         if (adapter.equals(IResumeActionEnabler.class)) {
             return new MIResumeActionEnabler(fExecutor, fServiceTracker, fContext);
         }
+        if (adapter.equals(IReverseDebugEnabler.class)) {
+        	return new MIReverseDebugEnabler(fExecutor, fServiceTracker, fContext);
+        }
         return null;
     }
 
diff --git a/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/breakpoint/actions/MIReverseDebugEnabler.java b/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/breakpoint/actions/MIReverseDebugEnabler.java
new file mode 100644
index 00000000000..09873ddd9b8
--- /dev/null
+++ b/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/breakpoint/actions/MIReverseDebugEnabler.java
@@ -0,0 +1,89 @@
+/*******************************************************************************
+ * Copyright (c) 2012 Ericsson 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:
+ *     Marc Dumais (Ericsson) - Initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.cdt.dsf.mi.service.breakpoint.actions;
+
+import org.eclipse.cdt.debug.core.breakpointactions.IReverseDebugEnabler;
+import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor;
+import org.eclipse.cdt.dsf.concurrent.DsfExecutor;
+import org.eclipse.cdt.dsf.concurrent.DsfRunnable;
+import org.eclipse.cdt.dsf.concurrent.RequestMonitor;
+import org.eclipse.cdt.dsf.datamodel.DMContexts;
+import org.eclipse.cdt.dsf.datamodel.IDMContext;
+import org.eclipse.cdt.dsf.debug.service.command.ICommandControlService.ICommandControlDMContext;
+import org.eclipse.cdt.dsf.gdb.service.IReverseRunControl;
+import org.eclipse.cdt.dsf.service.DsfServicesTracker;
+
+
+/**
+ * 
+ * This class permits to enable, disable or toggle the reverse
+ * debugging mode.
+ *   
+ * @since 4.2
+ */
+public class MIReverseDebugEnabler  implements IReverseDebugEnabler {
+    private final DsfExecutor fExecutor;
+    private final DsfServicesTracker fServiceTracker;
+    private final ICommandControlDMContext fContext;
+    private static enum REVERSE_DEBUG_MODE {ENABLE, DISABLE, TOGGLE};
+
+    /**
+     * @param executor
+     * @param serviceTracker
+     * @param context
+     */
+    public MIReverseDebugEnabler(DsfExecutor executor, DsfServicesTracker serviceTracker, IDMContext context) {
+        fExecutor = executor;
+        fServiceTracker = serviceTracker;
+        fContext = DMContexts.getAncestorOfType(context, ICommandControlDMContext.class);
+        assert fContext != null;
+    }
+
+	@Override
+	public void enable() throws Exception {
+		setMode(REVERSE_DEBUG_MODE.ENABLE);
+	}
+
+	@Override
+	public void disable() throws Exception {
+		setMode(REVERSE_DEBUG_MODE.DISABLE);
+	}
+	
+	@Override
+	public void toggle() throws Exception {
+		setMode(REVERSE_DEBUG_MODE.TOGGLE);
+	}
+
+	private void setMode(final REVERSE_DEBUG_MODE mode) throws Exception {		
+		fExecutor.execute(new DsfRunnable() { 
+    		@Override
+    		public void run() {
+    			final IReverseRunControl runControl = fServiceTracker.getService(IReverseRunControl.class);
+    			if (runControl != null) {
+    				runControl.isReverseModeEnabled(fContext, new DataRequestMonitor<Boolean>(fExecutor, null) {
+       					@Override
+       					public void handleSuccess() {
+       						Boolean enabled = getData();
+       						if ( (enabled.equals(false) && mode.equals(REVERSE_DEBUG_MODE.ENABLE) ) || 
+       							 (enabled.equals(true) && mode.equals(REVERSE_DEBUG_MODE.DISABLE) ) ||
+       							 (mode.equals(REVERSE_DEBUG_MODE.TOGGLE)) )
+       						{
+       							runControl.enableReverseMode(fContext, !enabled, new RequestMonitor(fExecutor, null));
+       						}
+       					}
+       				});
+    			}
+    		}
+    	});
+	}
+	
+}