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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
#ifndef widget_WindowOcclusionState_h
#define widget_WindowOcclusionState_h
namespace mozilla {
namespace widget {
// nsWindow's window occlusion state. On Windows, it is tracked by
// WinWindowOcclusionTracker.
enum class OcclusionState {
// The window's occlusion state isn't tracked (NotifyOcclusionState()) or
// hasn't been computed yet.
UNKNOWN = 0,
// The window IsWindowVisibleAndFullyOpaque() [1] and:
// - Its bounds aren't completely covered by fully opaque windows [2]
VISIBLE = 1,
// The window IsWindowVisibleAndFullyOpaque() [1], but they all:
// - Have bounds completely covered by fully opaque windows [2]
OCCLUDED = 2,
// The window is not IsWindowVisibleAndFullyOpaque() [1].
HIDDEN = 3,
kMaxValue = HIDDEN,
};
} // namespace widget
} // namespace mozilla
#endif // widget_WindowOcclusionState_h