diff -r 000000000000 -r 6474c204b198 editor/libeditor/base/DeleteTextTxn.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/editor/libeditor/base/DeleteTextTxn.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,70 @@
+/* -*- 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 DeleteTextTxn_h__
+#define DeleteTextTxn_h__
+
+#include "EditTxn.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsID.h"
+#include "nsIDOMCharacterData.h"
+#include "nsString.h"
+#include "nscore.h"
+
+class nsEditor;
+class nsRangeUpdater;
+
+/**
+ * A transaction that removes text from a content node.
+ */
+class DeleteTextTxn : public EditTxn
+{
+public:
+  /** initialize the transaction.
+    * @param aEditor  the provider of basic editing operations
+    * @param aElement the content node to remove text from
+    * @param aOffset  the location in aElement to begin the deletion
+    * @param aNumCharsToDelete  the number of characters to delete.  Not the number of bytes!
+    */
+  NS_IMETHOD Init(nsEditor* aEditor,
+                  nsIDOMCharacterData* aCharData,
+                  uint32_t aOffset,
+                  uint32_t aNumCharsToDelete,
+                  nsRangeUpdater* aRangeUpdater);
+
+  DeleteTextTxn();
+
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteTextTxn, EditTxn)
+  NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
+
+  NS_DECL_EDITTXN
+
+  uint32_t GetOffset() { return mOffset; }
+
+  uint32_t GetNumCharsToDelete() { return mNumCharsToDelete; }
+
+protected:
+
+  /** the provider of basic editing operations */
+  nsEditor* mEditor;
+
+  /** the CharacterData node to operate upon */
+  nsCOMPtr<nsIDOMCharacterData> mCharData;
+
+  /** the offset into mCharData where the deletion is to take place */
+  uint32_t mOffset;
+
+  /** the number of characters to delete */
+  uint32_t mNumCharsToDelete;
+
+  /** the text that was deleted */
+  nsString mDeletedText;
+
+  /** range updater object */
+  nsRangeUpdater* mRangeUpdater;
+};
+
+#endif