diff -r 000000000000 -r 6474c204b198 editor/composer/src/nsComposerCommandsUpdater.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/editor/composer/src/nsComposerCommandsUpdater.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,101 @@
+/* -*- 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 nsComposerCommandsUpdater_h__
+#define nsComposerCommandsUpdater_h__
+
+#include "nsCOMPtr.h"                   // for already_AddRefed, nsCOMPtr
+#include "nsIDocumentStateListener.h"
+#include "nsISelectionListener.h"
+#include "nsISupportsImpl.h"            // for NS_DECL_ISUPPORTS
+#include "nsITimer.h"                   // for NS_DECL_NSITIMERCALLBACK, etc
+#include "nsITransactionListener.h"     // for nsITransactionListener
+#include "nsIWeakReferenceUtils.h"      // for nsWeakPtr
+#include "nscore.h"                     // for NS_IMETHOD, nsresult, etc
+
+class nsIDOMWindow;
+class nsITransaction;
+class nsITransactionManager;
+class nsPICommandUpdater;
+
+class nsComposerCommandsUpdater : public nsISelectionListener,
+                                  public nsIDocumentStateListener,
+                                  public nsITransactionListener,
+                                  public nsITimerCallback
+{
+public:
+
+                                  nsComposerCommandsUpdater();
+  virtual                         ~nsComposerCommandsUpdater();
+
+  // nsISupports
+  NS_DECL_ISUPPORTS
+  
+  // nsISelectionListener
+  NS_DECL_NSISELECTIONLISTENER
+  
+  // nsIDocumentStateListener
+  NS_DECL_NSIDOCUMENTSTATELISTENER
+
+  // nsITimerCallback interfaces
+  NS_DECL_NSITIMERCALLBACK
+
+  /** nsITransactionListener interfaces
+    */  
+  NS_IMETHOD WillDo(nsITransactionManager *aManager, nsITransaction *aTransaction, bool *aInterrupt);
+  NS_IMETHOD DidDo(nsITransactionManager *aManager, nsITransaction *aTransaction, nsresult aDoResult);
+  NS_IMETHOD WillUndo(nsITransactionManager *aManager, nsITransaction *aTransaction, bool *aInterrupt);
+  NS_IMETHOD DidUndo(nsITransactionManager *aManager, nsITransaction *aTransaction, nsresult aUndoResult);
+  NS_IMETHOD WillRedo(nsITransactionManager *aManager, nsITransaction *aTransaction, bool *aInterrupt);
+  NS_IMETHOD DidRedo(nsITransactionManager *aManager, nsITransaction *aTransaction, nsresult aRedoResult);
+  NS_IMETHOD WillBeginBatch(nsITransactionManager *aManager, bool *aInterrupt);
+  NS_IMETHOD DidBeginBatch(nsITransactionManager *aManager, nsresult aResult);
+  NS_IMETHOD WillEndBatch(nsITransactionManager *aManager, bool *aInterrupt);
+  NS_IMETHOD DidEndBatch(nsITransactionManager *aManager, nsresult aResult);
+  NS_IMETHOD WillMerge(nsITransactionManager *aManager, nsITransaction *aTopTransaction,
+                       nsITransaction *aTransactionToMerge, bool *aInterrupt);
+  NS_IMETHOD DidMerge(nsITransactionManager *aManager, nsITransaction *aTopTransaction,
+                      nsITransaction *aTransactionToMerge,
+                      bool aDidMerge, nsresult aMergeResult);
+
+
+  nsresult   Init(nsIDOMWindow* aDOMWindow);
+
+protected:
+
+  enum {
+    eStateUninitialized   = -1,
+    eStateOff             = false,
+    eStateOn              = true
+  };
+  
+  bool          SelectionIsCollapsed();
+  nsresult      UpdateDirtyState(bool aNowDirty);  
+  nsresult      UpdateOneCommand(const char* aCommand);
+  nsresult      UpdateCommandGroup(const nsAString& aCommandGroup);
+
+  already_AddRefed<nsPICommandUpdater> GetCommandUpdater();
+  
+  nsresult      PrimeUpdateTimer();
+  void          TimerCallback();
+  nsCOMPtr<nsITimer>  mUpdateTimer;
+
+  nsWeakPtr     mDOMWindow;
+  nsWeakPtr     mDocShell;
+  int8_t        mDirtyState;  
+  int8_t        mSelectionCollapsed;  
+  bool          mFirstDoOfFirstUndo;
+    
+
+};
+
+extern "C" nsresult NS_NewComposerCommandsUpdater(nsISelectionListener** aInstancePtrResult);
+
+
+#endif // nsComposerCommandsUpdater_h__