Bug 193803. Expose iframes correctly in accessibility apis, fix iframe events. r=kyle, sr=henry

accessible/src/base/nsAccessible.cpp

@@ -558,14 +558,7 @@ NS_IMETHODIMP nsAccessible::GetAccId(PRInt32 *aAccId)
 
 NS_IMETHODIMP nsAccessible::CacheOptimizations(nsIAccessible *aParent, PRInt32 aSiblingIndex, nsIDOMNodeList *aSiblingList)
 {
-  if (aParent) {
-    PRUint32 role = 0;
-    aParent->GetAccRole(&role);
-    // prevent from invalid caching nsHTMLIFrameRootAccessible
-    if (role != ROLE_NOTHING) {
-      mParent = aParent;
-    }
-  }
+  mParent = aParent;
   if (aSiblingList) 
     mSiblingList = aSiblingList;
   mSiblingIndex = aSiblingIndex;

accessible/src/base/nsRootAccessible.cpp

@@ -835,8 +835,9 @@ void nsRootAccessible::FireDocLoadFinished()
     if (mBusy != eBusyStateDone) {
       mBusy = eBusyStateDone;
 #ifndef MOZ_ACCESSIBILITY_ATK
-      if (mListener)
+      if (mListener) {
         mListener->HandleEvent(nsIAccessibleEventListener::EVENT_STATE_CHANGE, this, nsnull);
+      }
 #endif
     }
   }

accessible/src/html/nsHTMLIFrameRootAccessible.cpp

@@ -56,36 +56,42 @@ nsHTMLIFrameAccessible::nsHTMLIFrameAccessible(nsIDOMNode* aNode, nsIAccessible*
   /* attribute wstring accName; */
 NS_IMETHODIMP nsHTMLIFrameAccessible::GetAccName(nsAString& aAccName) 
 { 
-  return GetTitle(aAccName);
+  nsresult rv = GetTitle(aAccName);
+  if (NS_FAILED(rv) || aAccName.IsEmpty())
+    rv = GetURL(aAccName);
+  return rv;
 }
 
 NS_IMETHODIMP nsHTMLIFrameAccessible::GetAccValue(nsAString& aAccValue) 
 { 
-  return GetURL(aAccValue);
+  return NS_OK;
 }
 
 /* nsIAccessible getAccFirstChild (); */
-NS_IMETHODIMP nsHTMLIFrameAccessible::GetAccFirstChild(nsIAccessible **_retval)
+NS_IMETHODIMP nsHTMLIFrameAccessible::GetAccFirstChild(nsIAccessible **aChild)
 {
-  return mRootAccessible->GetAccFirstChild(_retval);
+  NS_IF_ADDREF(*aChild = mRootAccessible);
+  return NS_OK;
 }
 
 /* nsIAccessible getAccLastChild (); */
-NS_IMETHODIMP nsHTMLIFrameAccessible::GetAccLastChild(nsIAccessible **_retval)
+NS_IMETHODIMP nsHTMLIFrameAccessible::GetAccLastChild(nsIAccessible **aChild)
 {
-  return mRootAccessible->GetAccLastChild(_retval);
+  NS_IF_ADDREF(*aChild = mRootAccessible);
+  return NS_OK;
 }
 
 /* long getAccChildCount (); */
-NS_IMETHODIMP nsHTMLIFrameAccessible::GetAccChildCount(PRInt32 *_retval)
+NS_IMETHODIMP nsHTMLIFrameAccessible::GetAccChildCount(PRInt32 *aNumChildren)
 {
-  return mRootAccessible->GetAccChildCount(_retval);
+  *aNumChildren = 1;
+  return NS_OK;
 }
 
 /* unsigned long getAccRole (); */
 NS_IMETHODIMP nsHTMLIFrameAccessible::GetAccRole(PRUint32 *_retval)
 {
-  *_retval = ROLE_PANE;
+  *_retval = ROLE_CLIENT;
   return NS_OK;
 }
 
@@ -352,13 +358,6 @@ nsHTMLIFrameRootAccessible::~nsHTMLIFrameRootAccessible()
 {
 }
 
-NS_IMETHODIMP nsHTMLIFrameRootAccessible::GetAccRole(PRUint32 *_retval)
-{
-  // prevent |this| from being cached by nsAccessible::CacheOptimizations
-  *_retval = ROLE_NOTHING;
-  return NS_OK;
-}
-
 /* void addAccessibleEventListener (in nsIAccessibleEventListener aListener); */
 NS_IMETHODIMP nsHTMLIFrameRootAccessible::AddAccessibleEventListener(nsIAccessibleEventListener *aListener)
 {
@@ -380,3 +379,18 @@ NS_IMETHODIMP nsHTMLIFrameRootAccessible::RemoveAccessibleEventListener()
   return NS_OK;
 }
 
+NS_IMETHODIMP nsHTMLIFrameRootAccessible::GetAccRole(PRUint32 *_retval)
+{
+  *_retval = ROLE_PANE;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsHTMLIFrameRootAccessible::GetAccName(nsAString& aAccName)
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsHTMLIFrameRootAccessible::GetAccValue(nsAString& aAccValue)
+{
+  return GetURL(aAccValue);
+}

accessible/src/html/nsHTMLIFrameRootAccessible.h

@@ -97,6 +97,8 @@ class nsHTMLIFrameRootAccessible : public nsRootAccessible
     virtual ~nsHTMLIFrameRootAccessible();
 
     NS_IMETHOD GetAccRole(PRUint32 *aAccRole);
+    NS_IMETHOD GetAccName(nsAString& aAccName);
+    NS_IMETHOD GetAccValue(nsAString& aAccValue);
 
     // ----- nsIAccessibleEventReceiver -------------------
     NS_IMETHOD AddAccessibleEventListener(nsIAccessibleEventListener *aListener);