michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_PaintTracker_h
michael@0: #define mozilla_PaintTracker_h
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsDebug.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: class MOZ_STACK_CLASS PaintTracker
michael@0: {
michael@0: public:
michael@0:   PaintTracker() {
michael@0:     ++gPaintTracker;
michael@0:   }
michael@0:   ~PaintTracker() {
michael@0:     NS_ASSERTION(gPaintTracker > 0, "Mismatched constructor/destructor");
michael@0:     --gPaintTracker;
michael@0:   }
michael@0: 
michael@0:   static bool IsPainting() {
michael@0:     return !!gPaintTracker;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   static int gPaintTracker;
michael@0: };
michael@0: 
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // mozilla_PaintTracker_h