1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/base/PaintTracker.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,34 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#ifndef mozilla_PaintTracker_h
1.9 +#define mozilla_PaintTracker_h
1.10 +
1.11 +#include "mozilla/Attributes.h"
1.12 +#include "nsDebug.h"
1.13 +
1.14 +namespace mozilla {
1.15 +
1.16 +class MOZ_STACK_CLASS PaintTracker
1.17 +{
1.18 +public:
1.19 + PaintTracker() {
1.20 + ++gPaintTracker;
1.21 + }
1.22 + ~PaintTracker() {
1.23 + NS_ASSERTION(gPaintTracker > 0, "Mismatched constructor/destructor");
1.24 + --gPaintTracker;
1.25 + }
1.26 +
1.27 + static bool IsPainting() {
1.28 + return !!gPaintTracker;
1.29 + }
1.30 +
1.31 +private:
1.32 + static int gPaintTracker;
1.33 +};
1.34 +
1.35 +} // namespace mozilla
1.36 +
1.37 +#endif // mozilla_PaintTracker_h
