added InsertElementTxn

added nsEditProperty
beginning of implementation for SetTextProperties.  Currently, it only works if the selection is entirely within a single text node.  Currently only
supports bold and italic (mapped to ctrl-b and ctrl-i for testing purposes.)
changed a bunch of interfaces to make things easier, like CreateElement now returns (as an out-param) the element created.


git-svn-id: svn://10.0.0.236/trunk@21760 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/editor/libeditor/base/SplitElementTxn.cpp

@@ -127,3 +127,14 @@ nsresult SplitElementTxn::GetRedoString(nsString **aString)
   }
   return NS_OK;
 }
+
+nsresult SplitElementTxn::GetNewNode(nsIDOMNode **aNewNode)
+{
+  if (!aNewNode)
+    return NS_ERROR_NULL_POINTER;
+  if (!mNewLeftNode)
+    return NS_ERROR_NOT_INITIALIZED;
+  *aNewNode = mNewLeftNode;
+  NS_ADDREF(*aNewNode);
+  return NS_OK;
+}