From f9911aaf0d62235597d56b77f0d2dde39453660e Mon Sep 17 00:00:00 2001
From: "surkov.alexander@gmail.com" <surkov.alexander@gmail.com>
Date: Wed, 3 Oct 2007 02:31:41 -0700
Subject: [PATCH] Bug 396424 - calculate selected state for currently active
 ARIA tab, r=aaronlev, a=dsicore

---
 accessible/src/base/nsAccessible.cpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/accessible/src/base/nsAccessible.cpp b/accessible/src/base/nsAccessible.cpp
index 43f2b0acebf0..af74bd51a482 100644
--- a/accessible/src/base/nsAccessible.cpp
+++ b/accessible/src/base/nsAccessible.cpp
@@ -2234,6 +2234,29 @@ nsAccessible::GetFinalState(PRUint32 *aState, PRUint32 *aExtraState)
   // Apply ARIA states to be sure accessible states will be overriden.
   *aState |= GetARIAState();
 
+  if (mRoleMapEntry && mRoleMapEntry->role == nsIAccessibleRole::ROLE_PAGETAB) {
+    if (*aState & nsIAccessibleStates::STATE_FOCUSED) {
+      *aState |= nsIAccessibleStates::STATE_SELECTED;
+    } else {
+      // Expose 'selected' state on ARIA tab if the focus is on internal element
+      // of related tabpanel.
+      nsCOMPtr<nsIAccessible> tabPanel;
+      rv = GetAccessibleRelated(nsIAccessibleRelation::RELATION_LABEL_FOR,
+                                getter_AddRefs(tabPanel));
+      NS_ENSURE_SUCCESS(rv, rv);
+
+      if (tabPanel && Role(tabPanel) == nsIAccessibleRole::ROLE_PROPERTYPAGE) {
+        nsCOMPtr<nsIAccessNode> tabPanelAccessNode(do_QueryInterface(tabPanel));
+        nsCOMPtr<nsIDOMNode> tabPanelNode;
+        tabPanelAccessNode->GetDOMNode(getter_AddRefs(tabPanelNode));
+        NS_ENSURE_STATE(tabPanelNode);
+
+        if (nsAccUtils::IsAncestorOf(tabPanelNode, gLastFocusedNode))
+          *aState |= nsIAccessibleStates::STATE_SELECTED;
+      }
+    }
+  }
+
   // Set additional states which presence depends on another states.
   if (!aExtraState)
     return NS_OK;