/* -*- 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 mozilla_ComposerCommandsUpdater_h

#define mozilla_ComposerCommandsUpdater_h

#include "nsCOMPtr.h"                   // for already_AddRefed, nsCOMPtr

#include "nsCycleCollectionParticipant.h"

#include "nsIDocumentStateListener.h"

#include "nsINamed.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 nsIDocShell;

class nsITransaction;

class nsITransactionManager;

class nsPIDOMWindowOuter;

class nsPICommandUpdater;

namespace mozilla {

class ComposerCommandsUpdater final : public nsIDocumentStateListener

                                    , public nsITransactionListener

                                    , public nsITimerCallback

                                    , public nsINamed

{

public:

  ComposerCommandsUpdater();

  // nsISupports

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS

  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(ComposerCommandsUpdater,

                                           nsIDocumentStateListener)

  // nsIDocumentStateListener

  NS_DECL_NSIDOCUMENTSTATELISTENER

  // nsITimerCallback

  NS_DECL_NSITIMERCALLBACK

  // nsINamed

  NS_DECL_NSINAMED

  // nsITransactionListener

  NS_DECL_NSITRANSACTIONLISTENER

  nsresult Init(nsPIDOMWindowOuter* aDOMWindow);

  /**

   * OnSelectionChange() is called when selection is changed in the editor.

   */

  void OnSelectionChange()

  {

    PrimeUpdateTimer();

  }

protected:

  virtual ~ComposerCommandsUpdater();

  enum

  {

    eStateUninitialized = -1,

    eStateOff = 0,

    eStateOn = 1,

  };

  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;

  nsCOMPtr<nsPIDOMWindowOuter> mDOMWindow;

  nsCOMPtr<nsIDocShell> mDocShell;

  int8_t mDirtyState;

  int8_t mSelectionCollapsed;

  bool mFirstDoOfFirstUndo;

};

} // namespace mozilla

#endif // #ifndef mozilla_ComposerCommandsUpdater_h