diff -r 000000000000 -r 6474c204b198 editor/libeditor/base/CreateElementTxn.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/editor/libeditor/base/CreateElementTxn.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef CreateElementTxn_h__
+#define CreateElementTxn_h__
+
+#include "EditTxn.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsIDOMNode.h"
+#include "nsISupportsImpl.h"
+#include "nsString.h"
+#include "nscore.h"
+
+class nsEditor;
+
+/**
+ * A transaction that creates a new node in the content tree.
+ */
+class CreateElementTxn : public EditTxn
+{
+public:
+  enum { eAppend=-1 };
+
+  /** Initialize the transaction.
+    * @param aEditor the provider of basic editing functionality
+    * @param aTag    the tag (P, HR, TABLE, etc.) for the new element
+    * @param aParent the node into which the new element will be inserted
+    * @param aOffsetInParent the location in aParent to insert the new element
+    *                        if eAppend, the new element is appended as the last child
+    */
+  NS_IMETHOD Init(nsEditor *aEditor,
+                  const nsAString& aTag,
+                  nsIDOMNode *aParent,
+                  uint32_t aOffsetInParent);
+
+  CreateElementTxn();
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(CreateElementTxn, EditTxn)
+
+  NS_DECL_EDITTXN
+
+  NS_IMETHOD RedoTransaction();
+
+  NS_IMETHOD GetNewNode(nsIDOMNode **aNewNode);
+
+protected:
+  
+  /** the document into which the new node will be inserted */
+  nsEditor* mEditor;
+  
+  /** the tag (mapping to object type) for the new element */
+  nsString mTag;
+
+  /** the node into which the new node will be inserted */
+  nsCOMPtr<nsIDOMNode> mParent;
+
+  /** the index in mParent for the new node */
+  uint32_t mOffsetInParent;
+
+  /** the new node to insert */
+  nsCOMPtr<nsIDOMNode> mNewNode;  
+
+  /** the node we will insert mNewNode before.  We compute this ourselves. */
+  nsCOMPtr<nsIDOMNode> mRefNode;
+};
+
+#endif