[XForms] Expose switch-state to script. Bug 332127, r=aaronr+doronr

extensions/xforms/nsIXFormsSwitchElement.idl

@@ -43,16 +43,21 @@ interface nsIDOMElement;
 /**
  * Interface implemented by the switch element.
  */
-[uuid(edeb1e48-5d5c-4091-8021-5975310caa66)]
+[scriptable, uuid(42af102c-4c96-4534-9ea7-20a23fddbf60)]
 interface nsIXFormsSwitchElement : nsISupports
 {
   /**
-   * Used by case elements to select or deselect themselves.
+   * Select or deselect a given case element.
    *
-   * @param aCase             The case element
-   * @param aValue            The value of the selected attribute.
+   * @param caseEl            The case element
+   * @param value             Select (true) or deselect (false)
    */
-  void setSelected(in nsIDOMElement aCase, in boolean aValue);
+  void setSelected(in nsIDOMElement caseEl, in boolean value);
+
+  /**
+   * Retrieve the currently selected case element.
+   */
+  readonly attribute nsIDOMElement selected;
 };
 
 

extensions/xforms/nsXFormsSwitchElement.cpp

@@ -232,6 +232,17 @@ nsXFormsSwitchElement::FindFirstSelectedCase(nsIDOMElement* aDeselected)
   return result;
 }
 
+// nsIXFormsSwitchElement
+
+NS_IMETHODIMP
+nsXFormsSwitchElement::GetSelected(nsIDOMElement **aCase)
+{
+  NS_ENSURE_ARG_POINTER(aCase);
+  NS_IF_ADDREF(*aCase = mSelected);
+  return NS_OK;
+}
+
+
 NS_IMETHODIMP
 nsXFormsSwitchElement::SetSelected(nsIDOMElement *aCase, PRBool aValue)
 {
@@ -292,6 +303,8 @@ nsXFormsSwitchElement::SetSelected(nsIDOMElement *aCase, PRBool aValue)
   return NS_OK;
 }
 
+// nsXFormsSwitchElement
+
 void
 nsXFormsSwitchElement::SetFocus(nsIDOMElement* aDeselected,
                                nsIDOMElement* aSelected)
@@ -380,6 +393,8 @@ nsXFormsSwitchElement::CaseChanged(nsIDOMNode* aCase, PRBool aRemoved)
   }
 }
 
+// nsIXFormsControl
+
 NS_IMETHODIMP
 nsXFormsSwitchElement::IsEventTarget(PRBool *aOK)
 {