Line data    Source code

       1             : /* This Source Code Form is subject to the terms of the Mozilla Public
       2             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       3             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       4             : 
       5             : #ifndef mozilla_PaintTracker_h
       6             : #define mozilla_PaintTracker_h
       7             : 
       8             : #include "mozilla/Attributes.h"
       9             : #include "nsDebug.h"
      10             : 
      11             : namespace mozilla {
      12             : 
      13             : class MOZ_STACK_CLASS PaintTracker
      14             : {
      15             : public:
      16           0 :   PaintTracker() {
      17           0 :     ++gPaintTracker;
      18           0 :   }
      19           0 :   ~PaintTracker() {
      20           0 :     NS_ASSERTION(gPaintTracker > 0, "Mismatched constructor/destructor");
      21           0 :     --gPaintTracker;
      22           0 :   }
      23             : 
      24             :   static bool IsPainting() {
      25             :     return !!gPaintTracker;
      26             :   }
      27             : 
      28             : private:
      29             :   static int gPaintTracker;
      30             : };
      31             : 
      32             : } // namespace mozilla
      33             : 
      34             : #endif // mozilla_PaintTracker_h