native_window_occlusion_tracker.h 1.6 KB

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  1. // Copyright 2020 The Chromium Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file.
  4. #ifndef UI_AURA_NATIVE_WINDOW_OCCLUSION_TRACKER_H_
  5. #define UI_AURA_NATIVE_WINDOW_OCCLUSION_TRACKER_H_
  6. #include "build/build_config.h"
  7. #include "ui/aura/aura_export.h"
  8. namespace aura {
  9. class WindowTreeHost;
  10. // This class is a shim between WindowOcclusionTracker and os-specific
  11. // window occlusion tracking classes (currently just
  12. // NativeWindowOcclusionTrackerWin).
  13. class AURA_EXPORT NativeWindowOcclusionTracker {
  14. public:
  15. NativeWindowOcclusionTracker() = delete;
  16. NativeWindowOcclusionTracker(const NativeWindowOcclusionTracker&) = delete;
  17. NativeWindowOcclusionTracker& operator=(const NativeWindowOcclusionTracker&) =
  18. delete;
  19. ~NativeWindowOcclusionTracker() = delete;
  20. // Enables native window occlusion tracking for the native window |host|
  21. // represents.
  22. static void EnableNativeWindowOcclusionTracking(WindowTreeHost* host);
  23. // Disables native window occlusion tracking for the native window |host|
  24. // represents.
  25. static void DisableNativeWindowOcclusionTracking(WindowTreeHost* host);
  26. // Returns whether native window occlusion tracking is always enabled.
  27. static bool IsNativeWindowOcclusionTrackingAlwaysEnabled(
  28. WindowTreeHost* host);
  29. private:
  30. friend class WindowTreeHostWithReleaseTest;
  31. friend class WindowTreeHostWithThrottleTest;
  32. #if BUILDFLAG(IS_WIN)
  33. static void SetHeadlessCheckEnabled(bool enabled);
  34. #endif
  35. };
  36. } // namespace aura
  37. #endif // UI_AURA_NATIVE_WINDOW_OCCLUSION_TRACKER_H_