editor/composer/src/nsComposerCommandsUpdater.h
author Marco Bonardo <mbonardo@mozilla.com>
Mon, 05 Oct 2009 12:12:46 +0200
changeset 33459 c2906e26f75af2ed5c218fe81d679f87fb22add2
parent 23902 eee705c20356aea694ecd7421680846855e7b3f5
permissions -rw-r--r--
Bug 519186 - drag & drop in bookmarks menu does not correctly update the view, r=mano This is a regression from bug 498130.

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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#ifndef nsComposerCommandsUpdater_h__
#define nsComposerCommandsUpdater_h__

#include "nsCOMPtr.h"
#include "nsITimer.h"
#include "nsWeakPtr.h"
#include "nsPICommandUpdater.h"

#include "nsISelectionListener.h"
#include "nsIDocumentStateListener.h"
#include "nsITransactionListener.h"

class nsIDocShell;
class nsITransactionManager;

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, PRBool *aInterrupt);
  NS_IMETHOD DidDo(nsITransactionManager *aManager, nsITransaction *aTransaction, nsresult aDoResult);
  NS_IMETHOD WillUndo(nsITransactionManager *aManager, nsITransaction *aTransaction, PRBool *aInterrupt);
  NS_IMETHOD DidUndo(nsITransactionManager *aManager, nsITransaction *aTransaction, nsresult aUndoResult);
  NS_IMETHOD WillRedo(nsITransactionManager *aManager, nsITransaction *aTransaction, PRBool *aInterrupt);
  NS_IMETHOD DidRedo(nsITransactionManager *aManager, nsITransaction *aTransaction, nsresult aRedoResult);
  NS_IMETHOD WillBeginBatch(nsITransactionManager *aManager, PRBool *aInterrupt);
  NS_IMETHOD DidBeginBatch(nsITransactionManager *aManager, nsresult aResult);
  NS_IMETHOD WillEndBatch(nsITransactionManager *aManager, PRBool *aInterrupt);
  NS_IMETHOD DidEndBatch(nsITransactionManager *aManager, nsresult aResult);
  NS_IMETHOD WillMerge(nsITransactionManager *aManager, nsITransaction *aTopTransaction,
                       nsITransaction *aTransactionToMerge, PRBool *aInterrupt);
  NS_IMETHOD DidMerge(nsITransactionManager *aManager, nsITransaction *aTopTransaction,
                      nsITransaction *aTransactionToMerge,
                      PRBool aDidMerge, nsresult aMergeResult);


  nsresult   Init(nsIDOMWindow* aDOMWindow);

protected:

  enum {
    eStateUninitialized   = -1,
    eStateOff             = PR_FALSE,
    eStateOn              = PR_TRUE
  };
  
  PRBool        SelectionIsCollapsed();
  nsresult      UpdateDirtyState(PRBool 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;
  PRInt8        mDirtyState;  
  PRInt8        mSelectionCollapsed;  
  PRPackedBool  mFirstDoOfFirstUndo;
    

};

extern "C" nsresult NS_NewComposerCommandsUpdater(nsISelectionListener** aInstancePtrResult);


#endif // nsComposerCommandsUpdater_h__