layout/printing/nsPagePrintTimer.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5 #ifndef nsPagePrintTimer_h___
   6 #define nsPagePrintTimer_h___
   7
   8 // Timer Includes
   9 #include "nsITimer.h"
  10
  11 #include "nsIDocumentViewerPrint.h"
  12 #include "nsPrintObject.h"
  13 #include "mozilla/Attributes.h"
  14 #include "nsThreadUtils.h"
  15
  16 class nsPrintEngine;
  17
  18 //---------------------------------------------------
  19 //-- Page Timer Class
  20 //---------------------------------------------------
  21 class nsPagePrintTimer MOZ_FINAL : public nsRunnable,
  22                                    public nsITimerCallback
  23 {
  24 public:
  25
  26   NS_DECL_ISUPPORTS_INHERITED
  27
  28   nsPagePrintTimer(nsPrintEngine* aPrintEngine,
  29                    nsIDocumentViewerPrint* aDocViewerPrint,
  30                    uint32_t aDelay)
  31     : mPrintEngine(aPrintEngine)
  32     , mDocViewerPrint(aDocViewerPrint)
  33     , mDelay(aDelay)
  34     , mFiringCount(0)
  35     , mPrintObj(nullptr)
  36     , mWatchDogCount(0)
  37     , mDone(false)
  38   {
  39     mDocViewerPrint->IncrementDestroyRefCount();
  40   }
  41
  42   NS_DECL_NSITIMERCALLBACK
  43
  44   nsresult Start(nsPrintObject* aPO);
  45
  46   NS_IMETHOD Run() MOZ_OVERRIDE;
  47
  48   void Stop();
  49
  50 private:
  51   ~nsPagePrintTimer();
  52
  53   nsresult StartTimer(bool aUseDelay);
  54   nsresult StartWatchDogTimer();
  55   void     StopWatchDogTimer();
  56   void     Fail();
  57
  58   nsPrintEngine*             mPrintEngine;
  59   nsCOMPtr<nsIDocumentViewerPrint> mDocViewerPrint;
  60   nsCOMPtr<nsITimer>         mTimer;
  61   nsCOMPtr<nsITimer>         mWatchDogTimer;
  62   uint32_t                   mDelay;
  63   uint32_t                   mFiringCount;
  64   nsPrintObject *            mPrintObj;
  65   uint32_t                   mWatchDogCount;
  66   bool                       mDone;
  67
  68   static const uint32_t WATCH_DOG_INTERVAL  = 1000;
  69   static const uint32_t WATCH_DOG_MAX_COUNT = 10;
  70 };
  71
  72
  73 nsresult
  74 NS_NewPagePrintTimer(nsPagePrintTimer **aResult);
  75
  76 #endif /* nsPagePrintTimer_h___ */