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Implementation is basically borrowed from chromium's NativeWindowOcclusionTrackerWin. For now, window occlusion could be applied only to toplevel window with compositor. Overview of current implementation is the following. https://github.com/sotaroikeda/firefox-diagrams/blob/master/widget/widget_WinWindowOcclusionTracker_94.pdf Capability of window occlusion is disabled by pref. VirtualDesktop handling is going to be handled by Bug 1732737. nsPrintDialogUtil.cpp is moved to non-unified source to avoid build failure. Differential Revision: https://phabricator.services.mozilla.com/D126710
35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef widget_WindowOcclusionState_h
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#define widget_WindowOcclusionState_h
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namespace mozilla {
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namespace widget {
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// nsWindow's window occlusion state. On Windows, it is tracked by
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// WinWindowOcclusionTracker.
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enum class OcclusionState {
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// The window's occlusion state isn't tracked (NotifyOcclusionState()) or
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// hasn't been computed yet.
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UNKNOWN = 0,
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// The window IsWindowVisibleAndFullyOpaque() [1] and:
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// - Its bounds aren't completely covered by fully opaque windows [2]
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VISIBLE = 1,
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// The window IsWindowVisibleAndFullyOpaque() [1], but they all:
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// - Have bounds completely covered by fully opaque windows [2]
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OCCLUDED = 2,
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// The window is not IsWindowVisibleAndFullyOpaque() [1].
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HIDDEN = 3,
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kMaxValue = HIDDEN,
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};
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} // namespace widget
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} // namespace mozilla
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#endif // widget_WindowOcclusionState_h
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