Bug 1190172 - Back out for now, requested by Masayuki at bug 1191356 comment 23

editor/libeditor/nsHTMLEditor.h

@@ -678,6 +678,7 @@ protected:
                                     const nsAString* aAttribute);
 
   bool NodeIsProperty(nsIDOMNode *aNode);
+  bool HasAttr(nsIDOMNode *aNode, const nsAString *aAttribute);
   bool IsAtFrontOfNode(nsIDOMNode *aNode, int32_t aOffset);
   bool IsAtEndOfNode(nsIDOMNode *aNode, int32_t aOffset);
   bool IsOnlyAttribute(const nsIContent* aElement, const nsAString& aAttribute);

editor/libeditor/nsHTMLEditorStyle.cpp

@@ -848,6 +848,26 @@ nsHTMLEditor::IsOnlyAttribute(const nsIContent* aContent,
   return true;
 }
 
+bool nsHTMLEditor::HasAttr(nsIDOMNode* aNode,
+                           const nsAString* aAttribute)
+{
+  NS_ENSURE_TRUE(aNode, false);
+  if (!aAttribute || aAttribute->IsEmpty()) {
+    // everybody has the 'null' attribute
+    return true;
+  }
+
+  // get element
+  nsCOMPtr<dom::Element> element = do_QueryInterface(aNode);
+  NS_ENSURE_TRUE(element, false);
+
+  nsCOMPtr<nsIAtom> atom = NS_Atomize(*aAttribute);
+  NS_ENSURE_TRUE(atom, false);
+
+  return element->HasAttr(kNameSpaceID_None, atom);
+}
+
+
 nsresult
 nsHTMLEditor::PromoteRangeIfStartsOrEndsInNamedAnchor(nsRange* inRange)
 {