--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.debug.ui/src/org/chromium/debug/ui/actions/OpenFunctionAction.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,125 @@
+package org.chromium.debug.ui.actions;
+
+import org.chromium.debug.core.model.Variable;
+import org.chromium.debug.ui.JsDebugModelPresentation;
+import org.chromium.debug.ui.editors.JsEditor;
+import org.chromium.sdk.JsFunction;
+import org.chromium.sdk.JsObject;
+import org.chromium.sdk.JsValue;
+import org.chromium.sdk.JsVariable;
+import org.chromium.sdk.Script;
+import org.eclipse.core.resources.IFile;
+import org.eclipse.jface.action.IAction;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.ui.IActionDelegate2;
+import org.eclipse.ui.IEditorInput;
+import org.eclipse.ui.IEditorPart;
+import org.eclipse.ui.IObjectActionDelegate;
+import org.eclipse.ui.IWorkbench;
+import org.eclipse.ui.IWorkbenchPart;
+import org.eclipse.ui.IWorkbenchWindow;
+import org.eclipse.ui.PartInitException;
+import org.eclipse.ui.PlatformUI;
+import org.eclipse.ui.texteditor.ITextEditor;
+
+/**
+ * The action for context view in Variable view that opens selected function source text in editor.
+ */
+public class OpenFunctionAction implements IObjectActionDelegate, IActionDelegate2 {
+  private Runnable currentRunnable = null;
+
+  public void setActivePart(IAction action, IWorkbenchPart targetPart) {
+  }
+
+  public void run(IAction action) {
+    if (currentRunnable == null) {
+      return;
+    }
+    currentRunnable.run();
+  }
+
+  public void selectionChanged(IAction action, ISelection selection) {
+    final Variable variable = getVariableFromSelection(selection);
+    final JsFunction jsFunction = getJsFunctionFromVariable(variable);
+
+    currentRunnable = createRunnable(variable, jsFunction);
+    action.setEnabled(currentRunnable != null);
+  }
+
+  private Runnable createRunnable(final Variable variable, final JsFunction jsFunction) {
+    if (jsFunction == null) {
+      return null;
+    }
+    return new Runnable() {
+
+      public void run() {
+        // This works in UI thread.
+        IWorkbench workbench = PlatformUI.getWorkbench();
+        final IWorkbenchWindow activeWorkbenchWindow = workbench.getActiveWorkbenchWindow();
+
+        Script script = jsFunction.getScript();
+        if (script == null) {
+          return;
+        }
+        IFile resource = variable.getDebugTarget().getResourceManager().getResource(script);
+        IEditorInput input = JsDebugModelPresentation.toEditorInput(resource);
+        IEditorPart editor;
+        try {
+          editor = activeWorkbenchWindow.getActivePage().openEditor(input, JsEditor.EDITOR_ID);
+        } catch (PartInitException e) {
+          throw new RuntimeException(e);
+        }
+        if (editor instanceof ITextEditor == false) {
+          return;
+        }
+        ITextEditor textEditor = (ITextEditor) editor;
+        textEditor.selectAndReveal(jsFunction.getSourcePosition(), 0);
+      }
+    };
+  }
+
+  public void dispose() {
+    currentRunnable = null;
+  }
+
+  public void init(IAction action) {
+  }
+
+  public void runWithEvent(IAction action, Event event) {
+    if (currentRunnable == null) {
+      return;
+    }
+    currentRunnable.run();
+  }
+
+  private JsFunction getJsFunctionFromVariable(Variable variable) {
+    if (variable == null) {
+      return null;
+    }
+    JsVariable jsVariable = variable.getJsVariable();
+    JsValue jsValue = jsVariable.getValue();
+    JsObject jsObject = jsValue.asObject();
+    if (jsObject == null) {
+      return null;
+    }
+    return jsObject.asFunction();
+  }
+
+  private Variable getVariableFromSelection(ISelection selection) {
+    if (selection instanceof IStructuredSelection == false) {
+      return null;
+    }
+    IStructuredSelection structuredSelection = (IStructuredSelection) selection;
+    if (structuredSelection.size() != 1) {
+      // We do not support multiple selection.
+      return null;
+    }
+    Object element = structuredSelection.getFirstElement();
+    if (element instanceof Variable == false) {
+      return null;
+    }
+    return (Variable) element;
+  }
+}