gecko-dev/layout/base/PaintTracker.h
2012-05-21 12:12:37 +01:00

35 lines
700 B
C++

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