1 files changed, 36 insertions, 8 deletions

diff --git a/WebCore/accessibility/AccessibilityRenderObject.cpp b/WebCore/accessibility/AccessibilityRenderObject.cpp
index 24c29d4..6b90b63 100644
--- a/WebCore/accessibility/AccessibilityRenderObject.cpp
+++ b/WebCore/accessibility/AccessibilityRenderObject.cpp
@@ -354,10 +354,10 @@ AccessibilityObject* AccessibilityRenderObject::nextSibling() const
     else if (isInlineWithContinuation(m_renderer->parent())) {
         RenderObject* continuation = toRenderInline(m_renderer->parent())->continuation();
         
-        // Case 4a: continuation is a block - in this case the block itself is the next sibling.
+        // Case 5a: continuation is a block - in this case the block itself is the next sibling.
         if (continuation->isRenderBlock())
             nextSibling = continuation;
-        // Case 4b: continuation is an inline - in this case the inline's first child is the next sibling
+        // Case 5b: continuation is an inline - in this case the inline's first child is the next sibling
         else
             nextSibling = firstChildConsideringContinuation(continuation);
     }
@@ -368,6 +368,13 @@ AccessibilityObject* AccessibilityRenderObject::nextSibling() const
     return axObjectCache()->getOrCreate(nextSibling);
 }
 
+static RenderBoxModelObject* nextContinuation(RenderObject* renderer)
+{
+    if (renderer->isInline() && !renderer->isReplaced())
+        return toRenderInline(renderer)->continuation();
+    return toRenderBlock(renderer)->inlineElementContinuation();
+}
+    
 RenderObject* AccessibilityRenderObject::renderParentObject() const
 {
     if (!m_renderer)
@@ -377,7 +384,8 @@ RenderObject* AccessibilityRenderObject::renderParentObject() const
 
     // Case 1: node is a block and is an inline's continuation. Parent
     // is the start of the continuation chain.
-    RenderInline* startOfConts = 0;
+    RenderObject* startOfConts = 0;
+    RenderObject* firstChild = 0;
     if (m_renderer->isRenderBlock() && (startOfConts = startOfContinuations(m_renderer)))
         parent = startOfConts;
 
@@ -386,6 +394,20 @@ RenderObject* AccessibilityRenderObject::renderParentObject() const
     else if (parent && parent->isRenderInline() && (startOfConts = startOfContinuations(parent)))
         parent = startOfConts;
     
+    // Case 3: The first sibling is the beginning of a continuation chain. Find the origin of that continuation.
+    else if (parent && (firstChild = parent->firstChild()) && firstChild->node()) {
+        // Get the node's renderer and follow that continuation chain until the first child is found
+        RenderObject* nodeRenderFirstChild = firstChild->node()->renderer();
+        if (nodeRenderFirstChild != firstChild) {
+            for (RenderObject* contsTest = nodeRenderFirstChild; contsTest; contsTest = nextContinuation(contsTest)) {
+                if (contsTest == firstChild) {
+                    parent = nodeRenderFirstChild->parent();
+                    break;
+                }
+            }
+        }
+    }
+        
     return parent;
 }
     
@@ -486,8 +508,9 @@ bool AccessibilityRenderObject::isFileUploadButton() const
     
 bool AccessibilityRenderObject::isInputImage() const
 {
-    if (m_renderer && m_renderer->node() && m_renderer->node()->hasTagName(inputTag)) {
-        HTMLInputElement* input = static_cast<HTMLInputElement*>(m_renderer->node());
+    Node* elementNode = node();
+    if (roleValue() == ButtonRole && elementNode && elementNode->hasTagName(inputTag)) {
+        HTMLInputElement* input = static_cast<HTMLInputElement*>(elementNode);
         return input->inputType() == HTMLInputElement::IMAGE;
     }
     
@@ -569,8 +592,11 @@ bool AccessibilityRenderObject::isIndeterminate() const
 bool AccessibilityRenderObject::isNativeCheckboxOrRadio() const
 {
     Node* elementNode = node();
-    if (elementNode && elementNode->isElementNode())
-        return toInputElement(static_cast<Element*>(elementNode));
+    if (elementNode && elementNode->isElementNode()) {
+        InputElement* input = toInputElement(static_cast<Element*>(elementNode));
+        if (input)
+            return input->isCheckbox() || input->isRadioButton();
+    }
     
     return false;
 }
@@ -3299,8 +3325,10 @@ void AccessibilityRenderObject::addChildren()
             unsigned length = children.size();
             for (unsigned i = 0; i < length; ++i)
                 m_children.append(children[i]);
-        } else
+        } else {
+            ASSERT(obj->parentObject() == this);
             m_children.append(obj);
+        }
     }
     
     // for a RenderImage, add the <area> elements as individual accessibility objects