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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_WINDOWS_NSWINDOWTASKBARCONCEALER_H_
#define WIDGET_WINDOWS_NSWINDOWTASKBARCONCEALER_H_
#include "nsWindow.h"
#include "mozilla/Maybe.h"
/**
* nsWindow::TaskbarConcealer
*
* Fullscreen-state (and, thus, taskbar-occlusion) manager.
*/
class nsWindow::TaskbarConcealer {
public:
// To be called when a window acquires focus. (Note that no action need be
// taken when focus is lost.)
static void OnFocusAcquired(nsWindow* aWin);
// To be called during or after a window's destruction. The corresponding
// nsWindow pointer is not needed, and will not be acquired or accessed.
static void OnWindowDestroyed(HWND aWnd);
// To be called when the Gecko-fullscreen state of a window changes.
static void OnFullscreenChanged(nsWindow* aWin, bool enteredFullscreen);
// To be called when the position of a window changes. (Performs its own
// batching; irrelevant movements will be cheap.)
static void OnWindowPosChanged(nsWindow* aWin);
// To be called when the cloaking state of any window changes. (Expects that
// all windows' internal cloaking-state mirror variables are up-to-date.)
static void OnCloakChanged();
// To be called upon receipt of MOZ_WM_FULLSCREEN_STATE_UPDATE.
static void OnAsyncStateUpdateRequest(HWND);
private:
static void UpdateAllState(HWND destroyedHwnd = nullptr);
struct WindowState {
HMONITOR monitor;
bool isGkFullscreen;
};
static mozilla::Maybe<WindowState> GetWindowState(HWND);
static nsTHashMap<HWND, HMONITOR> sKnownWindows;
};
#endif // WIDGET_WINDOWS_NSWINDOWTASKBARCONCEALER_H_
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