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Diffstat (limited to '')
-rw-r--r-- | widget/WindowOcclusionState.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/widget/WindowOcclusionState.h b/widget/WindowOcclusionState.h new file mode 100644 index 0000000000..76f70d9512 --- /dev/null +++ b/widget/WindowOcclusionState.h @@ -0,0 +1,34 @@ +/* -*- 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 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#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 |