From 6975411a43cc03188e96017577c6ad7127ba9262 Mon Sep 17 00:00:00 2001
From: Alexander Surkov <surkov.alexander@gmail.com>
Date: Thu, 22 Oct 2009 12:45:52 +0800
Subject: [PATCH] Bug 523565 - nsHTMLLabelAccessible shouldn't be text
 accessible, r=davidb

---
 accessible/src/html/nsHTMLTextAccessible.cpp | 62 ++++++++------------
 accessible/src/html/nsHTMLTextAccessible.h   |  8 +--
 2 files changed, 25 insertions(+), 45 deletions(-)

diff --git a/accessible/src/html/nsHTMLTextAccessible.cpp b/accessible/src/html/nsHTMLTextAccessible.cpp
index 9d025a2308a..09c013d1ed5 100644
--- a/accessible/src/html/nsHTMLTextAccessible.cpp
+++ b/accessible/src/html/nsHTMLTextAccessible.cpp
@@ -48,6 +48,10 @@
 #include "nsISelectionController.h"
 #include "nsComponentManagerUtils.h"
 
+////////////////////////////////////////////////////////////////////////////////
+// nsHTMLTextAccessible
+////////////////////////////////////////////////////////////////////////////////
+
 nsHTMLTextAccessible::nsHTMLTextAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
 nsTextAccessibleWrap(aDomNode, aShell)
 { 
@@ -112,6 +116,10 @@ nsHTMLTextAccessible::GetAttributesInternal(nsIPersistentProperties *aAttributes
   return NS_OK;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// nsHTMLHRAccessible
+////////////////////////////////////////////////////////////////////////////////
+
 nsHTMLHRAccessible::nsHTMLHRAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
 nsLeafAccessible(aDomNode, aShell)
 { 
@@ -162,13 +170,16 @@ nsHTMLBRAccessible::GetNameInternal(nsAString& aName)
   return NS_OK;
 }
 
-// A label is an element (not a leaf) and thus can support advanced interfaces.
-// We need to skip over nsTextAccessible QI which prevents that
-NS_IMPL_ISUPPORTS_INHERITED0(nsHTMLLabelAccessible, nsLinkableAccessible)
+////////////////////////////////////////////////////////////////////////////////
+// nsHTMLLabelAccessible
+////////////////////////////////////////////////////////////////////////////////
 
-nsHTMLLabelAccessible::nsHTMLLabelAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
-nsTextAccessible(aDomNode, aShell)
-{ 
+NS_IMPL_ISUPPORTS_INHERITED0(nsHTMLLabelAccessible, nsHyperTextAccessible)
+
+nsHTMLLabelAccessible::
+  nsHTMLLabelAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell) :
+  nsHyperTextAccessibleWrap(aDomNode, aShell)
+{
 }
 
 nsresult
@@ -184,37 +195,9 @@ nsHTMLLabelAccessible::GetRoleInternal(PRUint32 *aRole)
   return NS_OK;
 }
 
-nsresult
-nsHTMLLabelAccessible::GetStateInternal(PRUint32 *aState, PRUint32 *aExtraState)
-{
-  nsresult rv = nsTextAccessible::GetStateInternal(aState, aExtraState);
-  NS_ENSURE_A11Y_SUCCESS(rv, rv);
-
-  *aState &= (nsIAccessibleStates::STATE_LINKED |
-              nsIAccessibleStates::STATE_TRAVERSED); // Only use link states
-
-  return NS_OK;
-}
-
-NS_IMETHODIMP nsHTMLLabelAccessible::GetFirstChild(nsIAccessible **aFirstChild) 
-{  
-  // A <label> is not necessarily a leaf!
-  return nsAccessible::GetFirstChild(aFirstChild);
-}
-
-  /* readonly attribute nsIAccessible accFirstChild; */
-NS_IMETHODIMP nsHTMLLabelAccessible::GetLastChild(nsIAccessible **aLastChild)
-{  
-  // A <label> is not necessarily a leaf!
-  return nsAccessible::GetLastChild(aLastChild);
-}
-
-/* readonly attribute long accChildCount; */
-NS_IMETHODIMP nsHTMLLabelAccessible::GetChildCount(PRInt32 *aAccChildCount) 
-{
-  // A <label> is not necessarily a leaf!
-  return nsAccessible::GetChildCount(aAccChildCount);
-}
+////////////////////////////////////////////////////////////////////////////////
+// nsHTMLLIAccessible
+////////////////////////////////////////////////////////////////////////////////
 
 nsHTMLLIAccessible::nsHTMLLIAccessible(nsIDOMNode *aDOMNode, nsIWeakReference* aShell, 
                                        const nsAString& aBulletText):
@@ -290,8 +273,10 @@ void nsHTMLLIAccessible::CacheChildren()
   }
 }
 
-
+////////////////////////////////////////////////////////////////////////////////
 // nsHTMLListBulletAccessible
+////////////////////////////////////////////////////////////////////////////////
+
 nsHTMLListBulletAccessible::
   nsHTMLListBulletAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell,
                              const nsAString& aBulletText) :
@@ -364,6 +349,7 @@ nsHTMLListBulletAccessible::AppendTextTo(nsAString& aText, PRUint32 aStartOffset
 
 ////////////////////////////////////////////////////////////////////////////////
 // nsHTMLListAccessible
+////////////////////////////////////////////////////////////////////////////////
 
 nsresult
 nsHTMLListAccessible::GetRoleInternal(PRUint32 *aRole)
diff --git a/accessible/src/html/nsHTMLTextAccessible.h b/accessible/src/html/nsHTMLTextAccessible.h
index c1df95be261..84fe9806f67 100644
--- a/accessible/src/html/nsHTMLTextAccessible.h
+++ b/accessible/src/html/nsHTMLTextAccessible.h
@@ -80,22 +80,16 @@ public:
   virtual nsresult GetStateInternal(PRUint32 *aState, PRUint32 *aExtraState);
 };
 
-class nsHTMLLabelAccessible : public nsTextAccessible 
+class nsHTMLLabelAccessible : public nsHyperTextAccessibleWrap
 {
 public:
   nsHTMLLabelAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell);
 
   NS_DECL_ISUPPORTS_INHERITED
 
-  // nsIAccessible
-  NS_IMETHOD GetFirstChild(nsIAccessible **aFirstChild);
-  NS_IMETHOD GetLastChild(nsIAccessible **aLastChild);
-  NS_IMETHOD GetChildCount(PRInt32 *aAccChildCount);
-
   // nsAccessible
   virtual nsresult GetNameInternal(nsAString& aName);
   virtual nsresult GetRoleInternal(PRUint32 *aRole);
-  virtual nsresult GetStateInternal(PRUint32 *aState, PRUint32 *aExtraState);
 };
 
 class nsHTMLListBulletAccessible : public nsLeafAccessible