--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/org.symbian.tools.tmw.debug/src/org/symbian/tools/tmw/debug/ui/actions/WatchExpression.java	Mon Aug 23 09:55:57 2010 -0700
@@ -0,0 +1,132 @@
+/**
+ * Copyright (c) 2010 Symbian Foundation and/or its subsidiary(-ies).
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of the License "Eclipse Public License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.eclipse.org/legal/epl-v10.html".
+ *
+ * Initial Contributors:
+ * Symbian Foundation - initial contribution.
+ * Contributors:
+ * Description:
+ * Overview:
+ * Details:
+ * Platforms/Drives/Compatibility:
+ * Assumptions/Requirement/Pre-requisites:
+ * Failures and causes:
+ */
+package org.symbian.tools.tmw.debug.ui.actions;
+
+import org.eclipse.debug.core.DebugPlugin;
+import org.eclipse.debug.core.IExpressionManager;
+import org.eclipse.debug.core.model.IWatchExpression;
+import org.eclipse.debug.ui.IDebugUIConstants;
+import org.eclipse.jface.action.IAction;
+import org.eclipse.jface.text.ITextSelection;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.ui.IEditorActionDelegate;
+import org.eclipse.ui.IEditorInput;
+import org.eclipse.ui.IEditorPart;
+import org.eclipse.ui.PartInitException;
+import org.eclipse.ui.actions.ActionDelegate;
+import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
+import org.eclipse.wst.jsdt.core.dom.AST;
+import org.eclipse.wst.jsdt.core.dom.ASTNode;
+import org.eclipse.wst.jsdt.core.dom.ASTParser;
+import org.eclipse.wst.jsdt.core.dom.ASTVisitor;
+import org.eclipse.wst.jsdt.core.dom.SimpleName;
+import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
+import org.eclipse.wst.jsdt.internal.ui.javaeditor.WorkingCopyManager;
+import org.symbian.tools.tmw.debug.internal.Activator;
+
+@SuppressWarnings("restriction")
+public class WatchExpression extends ActionDelegate implements IEditorActionDelegate {
+    private final class FindNode extends ASTVisitor {
+        private final int offset;
+        private final int length;
+
+        private ASTNode node;
+
+        private FindNode(int offset, int length) {
+            super(false);
+            this.offset = offset;
+            this.length = length;
+        }
+
+        @Override
+        public boolean visit(SimpleName node) {
+            checkNode(node);
+            return true;
+        }
+
+        public void checkNode(ASTNode node) {
+            final int end = node.getStartPosition() + node.getLength();
+            if (node.getStartPosition() <= offset && end >= offset + length) {
+                this.node = node;
+            }
+        }
+
+        @Override
+        public void postVisit(ASTNode node) {
+            if (this.node == null) {
+                checkNode(node);
+            }
+        }
+
+        public ASTNode getNode() {
+            return node;
+        }
+    }
+
+    private IEditorPart targetEditor;
+
+    public void setActiveEditor(IAction action, IEditorPart targetEditor) {
+        this.targetEditor = targetEditor;
+    }
+
+    @Override
+    public void run(IAction action) {
+        ISelection selection = targetEditor.getEditorSite().getSelectionProvider().getSelection();
+        if (selection instanceof ITextSelection) {
+            final ITextSelection textSelection = (ITextSelection) selection;
+            final WorkingCopyManager manager = JavaScriptPlugin.getDefault().getWorkingCopyManager();
+            final IEditorInput editorInput = targetEditor.getEditorInput();
+            final IJavaScriptUnit workingCopy = manager.getWorkingCopy(editorInput);
+            final ASTParser parser = ASTParser.newParser(AST.JLS3);
+
+            parser.setSource(workingCopy);
+            final ASTNode ast = parser.createAST(null);
+            final FindNode visitor = new FindNode(textSelection.getOffset(), textSelection.getLength());
+            ast.accept(visitor);
+
+            final ASTNode node = visitor.getNode();
+            if (node != null) {
+                final String jsString;
+                if (node.getNodeType() == ASTNode.SIMPLE_NAME) {
+                    switch (node.getParent().getNodeType()) {
+                    case ASTNode.FIELD_ACCESS:
+                    case ASTNode.FUNCTION_INVOCATION:
+                        jsString = node.getParent().toString();
+                        break;
+                    default:
+                        jsString = node.toString();
+                        break;
+                    }
+                } else {
+                    jsString = node.toString();
+                }
+                IExpressionManager expressionManager = DebugPlugin.getDefault().getExpressionManager();
+                IWatchExpression expression = expressionManager.newWatchExpression(jsString);
+                expressionManager.addExpression(expression);
+
+                try {
+                    targetEditor.getSite().getPage().showView(IDebugUIConstants.ID_EXPRESSION_VIEW);
+                } catch (PartInitException e) {
+                    Activator.log(e);
+                }
+            }
+        }
+    }
+
+}