6814a1e510
Windows appears to detect maximized windows with custom titlebars as "full screen", and hides the taskbar behind them when autohide is enabled. (This appears to have been due to a change to their explicitly undocumented heuristics.) To avert this, arrange for just-maximized windows to be marked as _not_ being fullscreen. Per the relevant documentation this should have no effect, but it observably does -- it doesn't fix the issue in all cases, but it does for the common cases of "clicking the maximize icon" and "restoring maximized windows at Firefox start". Differential Revision: https://phabricator.services.mozilla.com/D239277
58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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_WINDOWS_NSWINDOWTASKBARCONCEALER_H_
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#define WIDGET_WINDOWS_NSWINDOWTASKBARCONCEALER_H_
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#include "nsWindow.h"
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#include "mozilla/Maybe.h"
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/**
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* nsWindow::TaskbarConcealer
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*
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* Fullscreen-state (and, thus, taskbar-occlusion) manager.
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*/
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class nsWindow::TaskbarConcealer {
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public:
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// To be called when a window acquires focus. (Note that no action need be
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// taken when focus is lost.)
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static void OnFocusAcquired(nsWindow* aWin);
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// To be called during or after a window's destruction. The corresponding
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// nsWindow pointer is not needed, and will not be acquired or accessed.
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static void OnWindowDestroyed(HWND aWnd);
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// To be called when a window is maximized. Harmlessly redundant with
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// OnFullscreenChanged.
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static void OnWindowMaximized(nsWindow* aWin);
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// To be called when the Gecko-fullscreen state of a window changes.
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static void OnFullscreenChanged(nsWindow* aWin, bool enteredFullscreen);
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// To be called when the position of a window changes. (Performs its own
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// batching; irrelevant movements will be cheap.)
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static void OnWindowPosChanged(nsWindow* aWin);
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// To be called when the cloaking state of any window changes. (Expects that
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// all windows' internal cloaking-state mirror variables are up-to-date.)
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static void OnCloakChanged();
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// To be called upon receipt of MOZ_WM_FULLSCREEN_STATE_UPDATE.
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static void OnAsyncStateUpdateRequest(HWND);
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private:
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static void UpdateAllState(HWND destroyedHwnd = nullptr);
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struct WindowState {
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HMONITOR monitor;
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bool isGkFullscreen;
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};
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static mozilla::Maybe<WindowState> GetWindowState(HWND);
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static nsTHashMap<HWND, HMONITOR> sKnownWindows;
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};
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#endif // WIDGET_WINDOWS_NSWINDOWTASKBARCONCEALER_H_
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