sola/qwindowkit.git

			@@ -5,13 +5,12 @@
			#include <QtCore/QHash>
			#include <QtCore/QScopeGuard>
			#include <QtCore/QTimer>
			#include <QtCore/QDateTime>
			#include <QtGui/QGuiApplication>
			#include <QtGui/QPainter>
			#include <QtGui/QPalette>
			#include <QtGui/QStyleHints>

			#include <QtCore/private/qwinregistry_p.h>
			#include <QtCore/private/qsystemlibrary_p.h>
			#include <QtGui/private/qhighdpiscaling_p.h>
			#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
			# include <QtGui/private/qguiapplication_p.h>
			@@ -23,45 +22,16 @@
			# include <QtGui/qpa/qplatformwindow_p.h>
			#endif

			#include <shellscalingapi.h>
			#include <dwmapi.h>
			#include <timeapi.h>
			#include <QWKCore/qwkconfig.h>

			#include "nativeeventfilter_p.h"
			#include "qwkglobal_p.h"
			#include "qwkwindowsextra_p.h"

			#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
			Q_DECLARE_METATYPE(QMargins)
			#endif

			namespace QWK {

			enum _DWMWINDOWATTRIBUTE {
			// [set] BOOL, Allows the use of host backdrop brushes for the window.
			_DWMWA_USE_HOSTBACKDROPBRUSH = 17,

			// Undocumented, the same with DWMWA_USE_IMMERSIVE_DARK_MODE, but available on systems
			// before Win10 20H1.
			_DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1 = 19,

			// [set] BOOL, Allows a window to either use the accent color, or dark, according to the
			// user Color Mode preferences.
			_DWMWA_USE_IMMERSIVE_DARK_MODE = 20,

			// [set] WINDOW_CORNER_PREFERENCE, Controls the policy that rounds top-level window corners
			_DWMWA_WINDOW_CORNER_PREFERENCE = 33,

			// [get] UINT, width of the visible border around a thick frame window
			_DWMWA_VISIBLE_FRAME_BORDER_THICKNESS = 37,

			// [get, set] SYSTEMBACKDROP_TYPE, Controls the system-drawn backdrop material of a window,
			// including behind the non-client area.
			_DWMWA_SYSTEMBACKDROP_TYPE = 38,

			// Undocumented, use this value to enable Mica material on Win11 21H2. You should use
			// DWMWA_SYSTEMBACKDROP_TYPE instead on Win11 22H2 and newer.
			_DWMWA_MICA_EFFECT = 1029
			};

			// The thickness of an auto-hide taskbar in pixels.
			static constexpr const quint8 kAutoHideTaskBarThickness = 2;
			@@ -80,257 +50,19 @@
			// Original Qt window proc function
			static WNDPROC g_qtWindowProc = nullptr;

			// ### FIXME FIXME FIXME
			// ### FIXME: Tell the user to call in the documentation, instead of automatically
			// calling it directly.
			// ### FIXME FIXME FIXME
			static struct QWK_Hook {
			QWK_Hook() {
			qApp->setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
			}
			} g_hook{};

			struct DynamicApis {
			static const DynamicApis &instance() {
			static const DynamicApis inst{};
			return inst;
			}

			// template <typename T>
			// struct DefaultFunc;
			//
			// template <typename Return, typename... Args>
			// struct DefaultFunc<Return(QT_WIN_CALLBACK *)(Args...)> {
			// static Return STDAPICALLTYPE func(Args...) {
			// return Return{};
			// }
			// };
			//
			// #define DYNAMIC_API_DECLARE(NAME) decltype(&::NAME) p##NAME =
			// DefaultFunc<decltype(&::NAME)>::func

			#define DYNAMIC_API_DECLARE(NAME) decltype(&::NAME) p##NAME = nullptr

			DYNAMIC_API_DECLARE(DwmFlush);
			DYNAMIC_API_DECLARE(DwmIsCompositionEnabled);
			DYNAMIC_API_DECLARE(DwmGetCompositionTimingInfo);
			DYNAMIC_API_DECLARE(DwmGetWindowAttribute);
			DYNAMIC_API_DECLARE(GetDpiForWindow);
			DYNAMIC_API_DECLARE(GetSystemMetricsForDpi);
			DYNAMIC_API_DECLARE(GetDpiForMonitor);
			DYNAMIC_API_DECLARE(timeGetDevCaps);
			DYNAMIC_API_DECLARE(timeBeginPeriod);
			DYNAMIC_API_DECLARE(timeEndPeriod);

			#undef DYNAMIC_API_DECLARE

			private:
			DynamicApis() {
			#define DYNAMIC_API_RESOLVE(DLL, NAME) \
			p##NAME = reinterpret_cast<decltype(p##NAME)>(DLL.resolve(#NAME))

			QSystemLibrary user32(QStringLiteral("user32"));
			DYNAMIC_API_RESOLVE(user32, GetDpiForWindow);
			DYNAMIC_API_RESOLVE(user32, GetSystemMetricsForDpi);

			QSystemLibrary shcore(QStringLiteral("shcore"));
			DYNAMIC_API_RESOLVE(shcore, GetDpiForMonitor);

			QSystemLibrary dwmapi(QStringLiteral("dwmapi"));
			DYNAMIC_API_RESOLVE(dwmapi, DwmFlush);
			DYNAMIC_API_RESOLVE(dwmapi, DwmIsCompositionEnabled);
			DYNAMIC_API_RESOLVE(dwmapi, DwmGetCompositionTimingInfo);
			DYNAMIC_API_RESOLVE(dwmapi, DwmGetWindowAttribute);

			QSystemLibrary winmm(QStringLiteral("winmm"));
			DYNAMIC_API_RESOLVE(winmm, timeGetDevCaps);
			DYNAMIC_API_RESOLVE(winmm, timeBeginPeriod);
			DYNAMIC_API_RESOLVE(winmm, timeEndPeriod);

			#undef DYNAMIC_API_RESOLVE
			}

			~DynamicApis() = default;

			Q_DISABLE_COPY_MOVE(DynamicApis)
			};

			static inline constexpr bool operator==(const POINT &lhs, const POINT &rhs) noexcept {
			return ((lhs.x == rhs.x) && (lhs.y == rhs.y));
			}

			static inline constexpr bool operator!=(const POINT &lhs, const POINT &rhs) noexcept {
			return !operator==(lhs, rhs);
			}

			static inline constexpr bool operator==(const SIZE &lhs, const SIZE &rhs) noexcept {
			return ((lhs.cx == rhs.cx) && (lhs.cy == rhs.cy));
			}

			static inline constexpr bool operator!=(const SIZE &lhs, const SIZE &rhs) noexcept {
			return !operator==(lhs, rhs);
			}

			static inline constexpr bool operator>(const SIZE &lhs, const SIZE &rhs) noexcept {
			return ((lhs.cx * lhs.cy) > (rhs.cx * rhs.cy));
			}

			static inline constexpr bool operator>=(const SIZE &lhs, const SIZE &rhs) noexcept {
			return (operator>(lhs, rhs) \|\| operator==(lhs, rhs));
			}

			static inline constexpr bool operator<(const SIZE &lhs, const SIZE &rhs) noexcept {
			return (operator!=(lhs, rhs) && !operator>(lhs, rhs));
			}

			static inline constexpr bool operator<=(const SIZE &lhs, const SIZE &rhs) noexcept {
			return (operator<(lhs, rhs) \|\| operator==(lhs, rhs));
			}

			static inline constexpr bool operator==(const RECT &lhs, const RECT &rhs) noexcept {
			return ((lhs.left == rhs.left) && (lhs.top == rhs.top) && (lhs.right == rhs.right) &&
			(lhs.bottom == rhs.bottom));
			}

			static inline constexpr bool operator!=(const RECT &lhs, const RECT &rhs) noexcept {
			return !operator==(lhs, rhs);
			}

			static inline constexpr QPoint point2qpoint(const POINT &point) {
			return QPoint{int(point.x), int(point.y)};
			}

			static inline constexpr POINT qpoint2point(const QPoint &point) {
			return POINT{LONG(point.x()), LONG(point.y())};
			}

			static inline constexpr QSize size2qsize(const SIZE &size) {
			return QSize{int(size.cx), int(size.cy)};
			}

			static inline constexpr SIZE qsize2size(const QSize &size) {
			return SIZE{LONG(size.width()), LONG(size.height())};
			}

			static inline constexpr QRect rect2qrect(const RECT &rect) {
			return QRect{
			QPoint{int(rect.left), int(rect.top) },
			QSize{int(RECT_WIDTH(rect)), int(RECT_HEIGHT(rect))}
			};
			}

			static inline constexpr RECT qrect2rect(const QRect &qrect) {
			return RECT{LONG(qrect.left()), LONG(qrect.top()), LONG(qrect.right()),
			LONG(qrect.bottom())};
			}

			static inline /constexpr/ QString hwnd2str(const WId windowId) {
			// NULL handle is allowed here.
			return QLatin1String("0x") +
			QString::number(windowId, 16).toUpper().rightJustified(8, u'0');
			}

			static inline /constexpr/ QString hwnd2str(HWND hwnd) {
			// NULL handle is allowed here.
			return hwnd2str(reinterpret_cast<WId>(hwnd));
			}

			static inline bool isWin8OrGreater() {
			static const bool result = IsWindows8OrGreater_Real();
			return result;
			}

			static inline bool isWin8Point1OrGreater() {
			static const bool result = IsWindows8Point1OrGreater_Real();
			return result;
			}

			static inline bool isWin10OrGreater() {
			static const bool result = IsWindows10OrGreater_Real();
			return result;
			}

			static inline bool isWin11OrGreater() {
			static const bool result = IsWindows11OrGreater_Real();
			return result;
			}

			static inline bool isDwmCompositionEnabled() {
			if (isWin8OrGreater()) {
			return true;
			}
			const DynamicApis &apis = DynamicApis::instance();
			if (!apis.pDwmIsCompositionEnabled) {
			return false;
			}
			BOOL enabled = FALSE;
			return SUCCEEDED(apis.pDwmIsCompositionEnabled(&enabled)) && enabled;
			}

			static inline bool isWindowFrameBorderColorized() {
			const QWinRegistryKey registry(HKEY_CURRENT_USER, LR"(Software\Microsoft\Windows\DWM)");
			if (!registry.isValid()) {
			return false;
			}
			const auto value = registry.dwordValue(L"ColorPrevalence");
			if (!value.second) {
			return false;
			}
			return value.first;
			}

			static inline bool isDarkThemeActive() {
			#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
			return QGuiApplication::styleHints()->colorScheme() == Qt::ColorScheme::Dark;
			#else
			const QWinRegistryKey registry(
			HKEY_CURRENT_USER, LR"(Software\Microsoft\Windows\CurrentVersion\Themes\Personalize)");
			if (!registry.isValid()) {
			return false;
			}
			const auto value = registry.dwordValue(L"AppsUseLightTheme");
			if (!value.second) {
			return false;
			}
			return !value.first;
			static inline bool
			#if !QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDER)
			constexpr
			#endif
			}

			static inline bool isDarkWindowFrameEnabled(HWND hwnd) {
			BOOL enabled = FALSE;
			const DynamicApis &apis = DynamicApis::instance();
			if (SUCCEEDED(apis.pDwmGetWindowAttribute(hwnd, _DWMWA_USE_IMMERSIVE_DARK_MODE, &enabled,
			sizeof(enabled)))) {
			return enabled;
			} else if (SUCCEEDED(apis.pDwmGetWindowAttribute(hwnd,
			_DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1,
			&enabled, sizeof(enabled)))) {
			return enabled;
			} else {
			return false;
			}
			}

			static inline QColor getAccentColor() {
			#if QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)
			return QGuiApplication::palette().color(QPalette::Accent);
			isSystemBorderEnabled() {
			return
			#if QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDER)
			isWin10OrGreater()
			#else
			const QWinRegistryKey registry(HKEY_CURRENT_USER, LR"(Software\Microsoft\Windows\DWM)");
			if (!registry.isValid()) {
			return {};
			}
			const auto value = registry.dwordValue(L"AccentColor");
			if (!value.second) {
			return {};
			}
			// The retrieved value is in the #AABBGGRR format, we need to
			// convert it to the #AARRGGBB format which Qt expects.
			const QColor abgr = QColor::fromRgba(value.first);
			if (!abgr.isValid()) {
			return {};
			}
			return QColor::fromRgb(abgr.blue(), abgr.green(), abgr.red(), abgr.alpha());
			false
			#endif
			;
			}

			static inline void triggerFrameChange(HWND hwnd) {
			@@ -388,16 +120,7 @@
			getSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi);
			}

			static void updateInternalWindowFrameMargins(HWND hwnd, QWindow *window) {
			const auto margins = [hwnd]() -> QMargins {
			const auto titleBarHeight = int(getTitleBarHeight(hwnd));
			if (isWin10OrGreater()) {
			return {0, -titleBarHeight, 0, 0};
			} else {
			const auto frameSize = int(getResizeBorderThickness(hwnd));
			return {-frameSize, -titleBarHeight, -frameSize, -frameSize};
			}
			}();
			static void setInternalWindowFrameMargins(QWindow *window, const QMargins &margins) {
			const QVariant marginsVar = QVariant::fromValue(margins);
			window->setProperty("_q_windowsCustomMargins", marginsVar);
			#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
			@@ -423,16 +146,83 @@
			monitorInfo.cbSize = sizeof(monitorInfo);
			::GetMonitorInfoW(monitor, &monitorInfo);
			return monitorInfo;
			};
			}

			static inline void moveToDesktopCenter(HWND hwnd) {
			const auto monitorInfo = getMonitorForWindow(hwnd);
			static inline void moveWindowToDesktopCenter(HWND hwnd) {
			MONITORINFOEXW monitorInfo = getMonitorForWindow(hwnd);
			RECT windowRect{};
			::GetWindowRect(hwnd, &windowRect);
			const auto newX = (RECT_WIDTH(monitorInfo.rcMonitor) - RECT_WIDTH(windowRect)) / 2;
			const auto newY = (RECT_HEIGHT(monitorInfo.rcMonitor) - RECT_HEIGHT(windowRect)) / 2;
			const auto newX = monitorInfo.rcMonitor.left +
			(RECT_WIDTH(monitorInfo.rcMonitor) - RECT_WIDTH(windowRect)) / 2;
			const auto newY = monitorInfo.rcMonitor.top +
			(RECT_HEIGHT(monitorInfo.rcMonitor) - RECT_HEIGHT(windowRect)) / 2;
			::SetWindowPos(hwnd, nullptr, newX, newY, 0, 0,
			SWP_NOACTIVATE \| SWP_NOSIZE \| SWP_NOZORDER \| SWP_NOOWNERZORDER);
			}

			static inline void moveWindowToMonitor(HWND hwnd, const MONITORINFOEXW &activeMonitor) {
			RECT currentMonitorRect = getMonitorForWindow(hwnd).rcMonitor;
			RECT activeMonitorRect = activeMonitor.rcMonitor;
			// We are in the same monitor, nothing to adjust here.
			if (currentMonitorRect == activeMonitorRect) {
			return;
			}
			RECT currentWindowRect{};
			::GetWindowRect(hwnd, &currentWindowRect);
			auto newWindowX =
			activeMonitorRect.left + (currentWindowRect.left - currentMonitorRect.left);
			auto newWindowY = activeMonitorRect.top + (currentWindowRect.top - currentMonitorRect.top);
			::SetWindowPos(hwnd, nullptr, newWindowX, newWindowY, RECT_WIDTH(currentWindowRect),
			RECT_HEIGHT(currentWindowRect),
			SWP_NOACTIVATE \| SWP_NOSIZE \| SWP_NOZORDER \| SWP_NOOWNERZORDER);
			}

			static inline void bringWindowToFront(HWND hwnd) {
			HWND oldForegroundWindow = ::GetForegroundWindow();
			if (!oldForegroundWindow) {
			// The foreground window can be NULL, it's not an API error.
			return;
			}
			MONITORINFOEXW activeMonitor = getMonitorForWindow(oldForegroundWindow);
			// We need to show the window first, otherwise we won't be able to bring it to front.
			if (!::IsWindowVisible(hwnd)) {
			::ShowWindow(hwnd, SW_SHOW);
			}
			if (IsMinimized(hwnd)) {
			// Restore the window if it is minimized.
			::ShowWindow(hwnd, SW_RESTORE);
			// Once we've been restored, throw us on the active monitor.
			moveWindowToMonitor(hwnd, activeMonitor);
			// When the window is restored, it will always become the foreground window.
			// So return early here, we don't need the following code to bring it to front.
			return;
			}
			// OK, our window is not minimized, so now we will try to bring it to front manually.
			// First try to send a message to the current foreground window to check whether
			// it is currently hanging or not.
			if (!::SendMessageTimeoutW(oldForegroundWindow, WM_NULL, 0, 0,
			SMTO_BLOCK \| SMTO_ABORTIFHUNG \| SMTO_NOTIMEOUTIFNOTHUNG, 1000,
			nullptr)) {
			// The foreground window hangs, can't activate current window.
			return;
			}
			DWORD windowThreadProcessId = ::GetWindowThreadProcessId(oldForegroundWindow, nullptr);
			DWORD currentThreadId = ::GetCurrentThreadId();
			// We won't be able to change a window's Z order if it's not our own window,
			// so we use this small technique to pretend the foreground window is ours.
			::AttachThreadInput(windowThreadProcessId, currentThreadId, TRUE);

			[[maybe_unused]] const auto &cleaner =
			qScopeGuard([windowThreadProcessId, currentThreadId]() {
			::AttachThreadInput(windowThreadProcessId, currentThreadId, FALSE); //
			});

			::BringWindowToTop(hwnd);
			// Activate the window too. This will force us to the virtual desktop this
			// window is on, if it's on another virtual desktop.
			::SetActiveWindow(hwnd);
			// Throw us on the active monitor.
			moveWindowToMonitor(hwnd, activeMonitor);
			}

			static inline bool isFullScreen(HWND hwnd) {
			@@ -449,6 +239,9 @@
			::GetWindowPlacement(hwnd, &wp);
			return ((wp.showCmd == SW_NORMAL) \|\| (wp.showCmd == SW_RESTORE));
			#else
			if (isFullScreen(hwnd)) {
			return false;
			}
			const auto style = static_cast<DWORD>(::GetWindowLongPtrW(hwnd, GWL_STYLE));
			return (!(style & (WS_MINIMIZE \| WS_MAXIMIZE)));
			#endif
			@@ -635,7 +428,7 @@
			// DefWindowProc(). Consequently, we have to add a global native filter that forwards the result
			// of the hook function, telling Qt whether we have filtered the events before. Since Qt only
			// handles Windows window messages in the main thread, it is safe to do so.
			class WindowsNativeEventFilter : public NativeEventFilter {
			class WindowsNativeEventFilter : public AppNativeEventFilter {
			public:
			bool nativeEventFilter(const QByteArray &eventType, void *message,
			QT_NATIVE_EVENT_RESULT_TYPE *result) override {
			@@ -768,18 +561,52 @@
			return ::CallWindowProcW(g_qtWindowProc, hWnd, message, wParam, lParam);
			}

			static inline void addManagedWindow(QWindow window, HWND hWnd, Win32WindowContext ctx) {
			const auto margins = [hWnd]() -> QMargins {
			const auto titleBarHeight = int(getTitleBarHeight(hWnd));
			if (isSystemBorderEnabled()) {
			return {0, -titleBarHeight, 0, 0};
			} else {
			const auto frameSize = int(getResizeBorderThickness(hWnd));
			return {-frameSize, -titleBarHeight, -frameSize, -frameSize};
			}
			}();

			// Inform Qt we want and have set custom margins
			setInternalWindowFrameMargins(window, margins);

			// Store original window proc
			if (!g_qtWindowProc) {
			g_qtWindowProc = reinterpret_cast<WNDPROC>(::GetWindowLongPtrW(hWnd, GWLP_WNDPROC));
			}

			// Hook window proc
			::SetWindowLongPtrW(hWnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(QWKHookedWndProc));

			// Install global native event filter
			WindowsNativeEventFilter::install();

			// Save window handle mapping
			g_wndProcHash->insert(hWnd, ctx);
			}

			static inline void removeManagedWindow(HWND hWnd) {
			// Remove window handle mapping
			if (!g_wndProcHash->remove(hWnd))
			return;

			// Remove event filter if the all windows has been destroyed
			if (g_wndProcHash->empty()) {
			WindowsNativeEventFilter::uninstall();
			}
			}

			Win32WindowContext::Win32WindowContext() : AbstractWindowContext() {
			}

			Win32WindowContext::~Win32WindowContext() {
			// Remove window handle mapping
			if (auto hWnd = reinterpret_cast<HWND>(windowId); hWnd) {
			g_wndProcHash->remove(hWnd);

			// Remove event filter if the all windows has been destroyed
			if (g_wndProcHash->empty()) {
			WindowsNativeEventFilter::uninstall();
			}
			if (windowId) {
			removeManagedWindow(reinterpret_cast<HWND>(windowId));
			}
			}

			@@ -790,15 +617,33 @@
			void Win32WindowContext::virtual_hook(int id, void *data) {
			switch (id) {
			case CentralizeHook: {
			const auto hwnd = reinterpret_cast<HWND>(m_windowHandle->winId());
			moveToDesktopCenter(hwnd);
			if (!windowId)
			return;
			const auto hwnd = reinterpret_cast<HWND>(windowId);
			moveWindowToDesktopCenter(hwnd);
			return;
			}

			case RaiseWindowHook: {
			if (!windowId)
			return;
			const auto hwnd = reinterpret_cast<HWND>(windowId);
			bringWindowToFront(hwnd);
			return;
			}

			case ShowSystemMenuHook: {
			if (!windowId)
			return;
			const auto &pos = static_cast<const QPoint >(data);
			auto hWnd = reinterpret_cast<HWND>(m_windowHandle->winId());
			showSystemMenu2(hWnd, qpoint2point(pos), false,
			auto hWnd = reinterpret_cast<HWND>(windowId);
			#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
			const QPoint nativeGlobalPos =
			QHighDpi::toNativeGlobalPosition(pos, m_windowHandle);
			#else
			const QPoint nativeGlobalPos = QHighDpi::toNativePixels(pos, m_windowHandle);
			#endif
			showSystemMenu2(hWnd, qpoint2point(nativeGlobalPos), false,
			m_delegate->isHostSizeFixed(m_host));
			return;
			}
			@@ -814,14 +659,18 @@
			}

			case DrawWindows10BorderHook: {
			#if QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDER)
			if (!windowId)
			return;

			auto args = static_cast<void **>(data);
			auto &painter = static_cast<QPainter >(args[0]);
			const auto &rect = static_cast<const QRect >(args[1]);
			const auto &region = static_cast<const QRegion >(args[2]);
			const auto hwnd = reinterpret_cast<HWND>(m_windowHandle->winId());
			const auto hwnd = reinterpret_cast<HWND>(windowId);

			QPen pen;
			pen.setWidth(getWindowFrameBorderThickness(hwnd) * 2);
			pen.setWidth(int(getWindowFrameBorderThickness(hwnd)) * 2);

			const bool dark = isDarkThemeActive() && isDarkWindowFrameEnabled(hwnd);
			if (m_delegate->isWindowActive(m_host)) {
			@@ -841,7 +690,7 @@
			}
			painter.save();

			// ### TODO: do we need to enable or disable it?
			// We need antialiasing to give us better result.
			painter.setRenderHint(QPainter::Antialiasing);

			painter.setPen(pen);
			@@ -850,50 +699,99 @@
			QPoint{m_windowHandle->width(), 0}
			});
			painter.restore();
			return;
			#endif
			}

			default: {
			// unreachable
			break;
			case DrawWindows10BorderHook2: {
			#if QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDER)
			if (!m_windowHandle)
			return;

			// https://github.com/microsoft/terminal/blob/71a6f26e6ece656084e87de1a528c4a8072eeabd/src/cascadia/WindowsTerminal/NonClientIslandWindow.cpp#L1025
			// https://docs.microsoft.com/en-us/windows/win32/dwm/customframe#extending-the-client-frame
			// Draw a black rectangle to make Windows native top border show

			auto hWnd = reinterpret_cast<HWND>(windowId);
			HDC hdc = ::GetDC(hWnd);
			RECT windowRect{};
			::GetClientRect(hWnd, &windowRect);
			RECT rcTopBorder = {
			0,
			0,
			RECT_WIDTH(windowRect),
			int(getWindowFrameBorderThickness(hWnd)),
			};
			::FillRect(hdc, &rcTopBorder,
			reinterpret_cast<HBRUSH>(::GetStockObject(BLACK_BRUSH)));
			::ReleaseDC(hWnd, hdc);
			#endif
			return;
			}

			default:
			break;
			}
			AbstractWindowContext::virtual_hook(id, data);
			}

			bool Win32WindowContext::needBorderPainter() const {
			return isWin10OrGreater() && !isWin11OrGreater();
			Q_UNUSED(this)
			return isSystemBorderEnabled() && !isWin11OrGreater();
			}

			int Win32WindowContext::borderThickness() const {
			return getWindowFrameBorderThickness(reinterpret_cast<HWND>(windowId));
			return int(getWindowFrameBorderThickness(reinterpret_cast<HWND>(windowId)));
			}

			bool Win32WindowContext::setupHost() {
			void Win32WindowContext::resume(const QByteArray &eventType, void *message,
			QT_NATIVE_EVENT_RESULT_TYPE *result) {
			const auto msg = static_cast<const MSG *>(message);
			LRESULT res =
			::CallWindowProcW(g_qtWindowProc, msg->hwnd, msg->message, msg->wParam, msg->lParam);
			result = decltype(result)(res);
			}

			void Win32WindowContext::winIdChanged() {
			// If the original window id is valid, remove all resources related
			if (windowId) {
			removeManagedWindow(reinterpret_cast<HWND>(windowId));
			windowId = 0;
			}

			if (!m_windowHandle) {
			return;
			}

			// Install window hook
			auto winId = m_windowHandle->winId();
			auto hWnd = reinterpret_cast<HWND>(winId);

			// Inform Qt we want and have set custom margins
			updateInternalWindowFrameMargins(hWnd, m_windowHandle);

			// Store original window proc
			if (!g_qtWindowProc) {
			g_qtWindowProc = reinterpret_cast<WNDPROC>(::GetWindowLongPtrW(hWnd, GWLP_WNDPROC));
			if (!isSystemBorderEnabled()) {
			static constexpr const MARGINS margins = {1, 1, 1, 1};
			DynamicApis::instance().pDwmExtendFrameIntoClientArea(hWnd, &margins);
			} else if (isWin10OrGreater() && !isWin11OrGreater()) {
			// https://github.com/microsoft/terminal/blob/71a6f26e6ece656084e87de1a528c4a8072eeabd/src/cascadia/WindowsTerminal/NonClientIslandWindow.cpp#L940
			// Must call DWM API to extend top frame to client area
			static constexpr const MARGINS margins = {0, 0, 1, 0};
			DynamicApis::instance().pDwmExtendFrameIntoClientArea(hWnd, &margins);
			}

			// Hook window proc
			::SetWindowLongPtrW(hWnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(QWKHookedWndProc));
			{
			auto style = ::GetWindowLongPtrW(hWnd, GWL_STYLE);
			#if QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDER)
			::SetWindowLongPtrW(hWnd, GWL_STYLE, style & (~WS_SYSMENU));
			#else
			::SetWindowLongPtrW(hWnd, GWL_STYLE,
			(style \| WS_THICKFRAME \| WS_CAPTION) & (~WS_SYSMENU));
			#endif
			}

			// Install global native event filter
			WindowsNativeEventFilter::install();
			// Add managed window
			addManagedWindow(m_windowHandle, hWnd, this);

			// Cache window ID
			// Cache win id
			windowId = winId;

			// Save window handle mapping
			g_wndProcHash->insert(hWnd, this);

			return true;
			}

			bool Win32WindowContext::windowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam,
			@@ -933,11 +831,189 @@
			return true;
			}

			if (themeStuffHandler(hWnd, message, wParam, lParam, result)) {
			// Forward to native event filter subscribers
			if (!m_nativeEventFilters.isEmpty()) {
			MSG msg;
			msg.hwnd = hWnd;
			msg.message = message;
			msg.wParam = wParam;
			msg.lParam = lParam;
			QT_NATIVE_EVENT_RESULT_TYPE res = 0;
			if (dispatch(QByteArrayLiteral("windows_generic_MSG"), &msg, &res)) {
			*result = LRESULT(res);
			return true;
			}
			}
			return false; // Not handled
			}

			bool Win32WindowContext::windowAttributeChanged(const QString &key, const QVariant &attribute,
			const QVariant &oldAttribute) {
			const auto hwnd = reinterpret_cast<HWND>(m_windowHandle->winId());
			const DynamicApis &apis = DynamicApis::instance();
			static constexpr const MARGINS extendMargins = {-1, -1, -1, -1};
			static const auto defaultMargins =
			isSystemBorderEnabled() ? MARGINS{0, 0, 0, 0} : MARGINS{1, 1, 1, 1};
			if (key == QStringLiteral("mica")) {
			if (!isWin11OrGreater()) {
			return false;
			}
			if (attribute.toBool()) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendMargins);
			if (isWin1122H2OrGreater()) {
			// Use official DWM API to enable Mica, available since Windows 11 22H2
			// (10.0.22621).
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_MAINWINDOW;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));
			} else {
			// Use undocumented DWM API to enable Mica, available since Windows 11
			// (10.0.22000).
			const BOOL enable = TRUE;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_MICA_EFFECT, &enable, sizeof(enable));
			}
			} else {
			if (isWin1122H2OrGreater()) {
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_AUTO;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));
			} else {
			const BOOL enable = FALSE;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_MICA_EFFECT, &enable, sizeof(enable));
			}
			apis.pDwmExtendFrameIntoClientArea(hwnd, &defaultMargins);
			}
			return true;
			} else if (key == QStringLiteral("mica-alt")) {
			if (!isWin1122H2OrGreater()) {
			return false;
			}
			if (attribute.toBool()) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendMargins);
			// Use official DWM API to enable Mica Alt, available since Windows 11 22H2
			// (10.0.22621).
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_TABBEDWINDOW;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));
			} else {
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_AUTO;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));
			apis.pDwmExtendFrameIntoClientArea(hwnd, &defaultMargins);
			}
			return true;
			} else if (key == QStringLiteral("acrylic-material")) {
			if (!isWin11OrGreater()) {
			return false;
			}
			if (attribute.toBool()) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendMargins);

			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_TRANSIENTWINDOW;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));

			// PRIVATE API REFERENCE:
			// QColor gradientColor = {};
			// ACCENT_POLICY policy{};
			// policy.dwAccentState = ACCENT_ENABLE_ACRYLICBLURBEHIND;
			// policy.dwAccentFlags = ACCENT_ENABLE_ACRYLIC_WITH_LUMINOSITY;
			// // This API expects the #AABBGGRR format.
			// policy.dwGradientColor =
			// DWORD(qRgba(gradientColor.blue(), gradientColor.green(),
			// gradientColor.red(), gradientColor.alpha()));
			// WINDOWCOMPOSITIONATTRIBDATA wcad{};
			// wcad.Attrib = WCA_ACCENT_POLICY;
			// wcad.pvData = &policy;
			// wcad.cbData = sizeof(policy);
			// apis.pSetWindowCompositionAttribute(hwnd, &wcad);
			} else {
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_AUTO;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));

			// PRIVATE API REFERENCE:
			// ACCENT_POLICY policy{};
			// policy.dwAccentState = ACCENT_DISABLED;
			// policy.dwAccentFlags = ACCENT_NONE;
			// WINDOWCOMPOSITIONATTRIBDATA wcad{};
			// wcad.Attrib = WCA_ACCENT_POLICY;
			// wcad.pvData = &policy;
			// wcad.cbData = sizeof(policy);
			// apis.pSetWindowCompositionAttribute(hwnd, &wcad);

			apis.pDwmExtendFrameIntoClientArea(hwnd, &defaultMargins);
			}
			return true;
			} else if (key == QStringLiteral("dwm-blur")) {
			// TODO: Optimize
			// Currently not available!!!
			if (attribute.toBool()) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendMargins);
			if (isWin8OrGreater()) {
			ACCENT_POLICY policy{};
			policy.dwAccentState = ACCENT_ENABLE_BLURBEHIND;
			policy.dwAccentFlags = ACCENT_NONE;
			WINDOWCOMPOSITIONATTRIBDATA wcad{};
			wcad.Attrib = WCA_ACCENT_POLICY;
			wcad.pvData = &policy;
			wcad.cbData = sizeof(policy);
			apis.pSetWindowCompositionAttribute(hwnd, &wcad);
			} else {
			DWM_BLURBEHIND bb{};
			bb.fEnable = TRUE;
			bb.dwFlags = DWM_BB_ENABLE;
			apis.pDwmEnableBlurBehindWindow(hwnd, &bb);
			}
			} else {
			if (isWin8OrGreater()) {
			ACCENT_POLICY policy{};
			policy.dwAccentState = ACCENT_DISABLED;
			policy.dwAccentFlags = ACCENT_NONE;
			WINDOWCOMPOSITIONATTRIBDATA wcad{};
			wcad.Attrib = WCA_ACCENT_POLICY;
			wcad.pvData = &policy;
			wcad.cbData = sizeof(policy);
			apis.pSetWindowCompositionAttribute(hwnd, &wcad);
			} else {
			DWM_BLURBEHIND bb{};
			bb.fEnable = FALSE;
			bb.dwFlags = DWM_BB_ENABLE;
			apis.pDwmEnableBlurBehindWindow(hwnd, &bb);
			}
			apis.pDwmExtendFrameIntoClientArea(hwnd, &defaultMargins);
			}
			return true;
			} else if (key == QStringLiteral("dark-mode")) {
			if (!isWin101809OrGreater()) {
			return false;
			}

			BOOL enable = attribute.toBool();
			if (isWin101903OrGreater()) {
			apis.pSetPreferredAppMode(enable ? PAM_AUTO : PAM_DEFAULT);
			} else {
			apis.pAllowDarkModeForApp(enable);
			}
			for (const auto attr : {
			_DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1,
			_DWMWA_USE_IMMERSIVE_DARK_MODE,
			}) {
			apis.pDwmSetWindowAttribute(hwnd, attr, &enable, sizeof(enable));
			}

			apis.pFlushMenuThemes();
			return true;
			}

			return false; // Not handled
			return false;
			}

			QWK_USED static constexpr const struct {
			@@ -1145,7 +1221,54 @@
			const WindowPart currentWindowPart = lastHitTestResult;
			if (message == WM_NCMOUSEMOVE) {
			if (currentWindowPart != WindowPart::ChromeButton) {
			m_delegate->resetQtGrabbedControl();
			// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/widgets/kernel/qwidgetwindow.cpp#L472
			// When the mouse press event arrives, QWidgetWindow will implicitly grab
			// the top widget right under the mouse, and set `qt_button_down` to this
			// widget. At this time, no other widgets will accept the mouse event until
			// QWidgetWindow receives the mouse release event, then set `qt_button_down`
			// to null.

			// Imagine the following situation, now the main window has a pop-up menu,
			// the focus is not on the main window, if we click outside the pop-up menu,
			// the menu will close, which seems to be completely fine. But if we close
			// the menu by clicking on the title bar draggable area, then other widgets
			// won't accept the mouse message afterwards.

			// Here's the reason.
			// When the mouse is placed in the draggable area of the title bar, there
			// are two situations.

			// 1. If the focus is on the main window, and the last result of
			// WM_NCHITTEST is HTCAPTION, the mouse click event in the title bar is
			// taken over by Windows and Qt does not receive the mouse click event.

			// 2. If the main window has a pop-up menu, it is completely different. When
			// the mouse is pressed on the title bar, Windows sends the WM_LBUTTONDOWN
			// message to the window plane of the pop-up menu, the menu is closed, but
			// Qt will continue to forward the event to the QWidget under the mouse, and
			// the event will be processed by QWidgetWindow, causing the title bar
			// widget to be implicitly grabbed. After the menu is closed, Windows
			// immediately sends WM_NCHITTEST, because the mouse is in the title bar
			// draggable area, the result is HTCAPTION, so when the mouse is released,
			// Windows sends WM_NCLBUTTONUP, which is a non-client message, and it
			// will be ignored by Qt. As a consequence, QWidgetWindow can't receive a
			// mouse release message in the client area, so the grab remains, and other
			// widgets cannot receive mouse events.

			// Since we didn't watch the menu window, we cannot capture any mouse
			// press events sent by Windows, so we cannot solve this problem by
			// recording mouse events. Fortunately, we found that the main window will
			// receive a WM_NCMOUSEMOVE message immediately after the menu is closed, so
			// we just manually send a mouse release event when this message arrives and
			// set qt_button_down to null. Don't worry, when receiving WM_NCMOUSEMOVE,
			// there shouldn't be any control in the state of being grabbed.

			// In the native window, although QWidgetWindow handles the forwarded mouse
			// press event when the menu is closed, since the native title bar is not a
			// QWidget, no widget will be grabbed, and `qt_button_down` remains empty,
			// the above problems would not arise.

			m_delegate->resetQtGrabbedControl(m_host);
			if (mouseLeaveBlocked) {
			emulateClientAreaMessage(hWnd, message, wParam, lParam,
			WM_NCMOUSELEAVE);
			@@ -1207,7 +1330,9 @@
			// window from client area, which means we will get previous window part as
			// HTCLIENT if the mouse leaves window from client area and enters window
			// from non-client area, but it has no bad effect.
			m_delegate->resetQtGrabbedControl();

			// Why do we need to call this function here?
			m_delegate->resetQtGrabbedControl(m_host);
			}
			}
			break;
			@@ -1227,9 +1352,9 @@
			// If wParam is TRUE, the window is being shown.
			// If lParam is zero, the message was sent because of a call to the ShowWindow
			// function.
			if (wParam && lParam == 0) {
			if (wParam && !lParam) {
			centered = true;
			moveToDesktopCenter(hWnd);
			moveWindowToDesktopCenter(hWnd);
			}
			}
			break;
			@@ -1316,7 +1441,6 @@
			// Terminal does, however, later I found that if we choose a proper
			// color, our homemade top border can almost have exactly the same
			// appearance with the system's one.

			[[maybe_unused]] const auto &hitTestRecorder = qScopeGuard([this, result]() {
			lastHitTestResult = getHitWindowPart(int(*result)); //
			});
			@@ -1417,7 +1541,7 @@
			int frameSize = getResizeBorderThickness(hWnd);
			bool isTop = (nativeLocalPos.y < frameSize);

			if (isWin10OrGreater()) {
			if (isSystemBorderEnabled()) {
			// This will handle the left, right and bottom parts of the frame
			// because we didn't change them.
			LRESULT originalHitTestResult = ::DefWindowProcW(hWnd, WM_NCHITTEST, 0, lParam);
			@@ -1439,7 +1563,7 @@
			*result = (isTitleBar ? HTCAPTION : HTCLIENT);
			return true;
			}
			// At this point, we know that the cursor is inside the client area
			// At this point, we know that the cursor is inside the client area,
			// so it has to be either the little border at the top of our custom
			// title bar or the drag bar. Apparently, it must be the drag bar or
			// the little border at the top which the user can use to move or
			@@ -1532,9 +1656,10 @@
			// the client area as a whole will shift to the left, which looks very abnormal if
			// we don't repaint it. This exception disappears if we add SWP_NOCOPYBITS flag.
			// But I don't know what caused the problem, or why this would solve it.
			static constexpr const auto kBadWindowPosFlag =
			SWP_NOSIZE \| SWP_NOMOVE \| SWP_NOZORDER \| SWP_NOACTIVATE \| SWP_FRAMECHANGED;
			const auto windowPos = reinterpret_cast<LPWINDOWPOS>(lParam);
			if (windowPos->flags ==
			(SWP_NOSIZE \| SWP_NOMOVE \| SWP_NOZORDER \| SWP_NOACTIVATE \| SWP_FRAMECHANGED)) {
			if (windowPos->flags == kBadWindowPosFlag) {
			windowPos->flags \|= SWP_NOCOPYBITS;
			}
			break;
			@@ -1544,7 +1669,7 @@
			break;
			}

			if (!isWin10OrGreater()) {
			if (!isSystemBorderEnabled()) {
			switch (message) {
			case WM_NCUAHDRAWCAPTION:
			case WM_NCUAHDRAWFRAME: {
			@@ -1576,11 +1701,7 @@
			// window activation state change.
			*result = ::DefWindowProcW(hWnd, WM_NCACTIVATE, wParam, -1);
			} else {
			if (wParam) {
			*result = FALSE;
			} else {
			*result = TRUE;
			}
			*result = TRUE;
			}
			return true;
			}
			@@ -1699,7 +1820,7 @@
			// and align it with the upper-left corner of our new client area".
			const auto clientRect = wParam ? &(reinterpret_cast<LPNCCALCSIZE_PARAMS>(lParam))->rgrc[0]
			: reinterpret_cast<LPRECT>(lParam);
			if (isWin10OrGreater()) {
			if (isSystemBorderEnabled()) {
			// Store the original top margin before the default window procedure applies the
			// default frame.
			const LONG originalTop = clientRect->top;
			@@ -1726,6 +1847,7 @@
			// technique to bring the top border back.
			clientRect->top = originalTop;
			}

			const bool max = IsMaximized(hWnd);
			const bool full = isFullScreen(hWnd);
			// We don't need this correction when we're fullscreen. We will
			@@ -1740,7 +1862,7 @@
			// a window when it's maximized unless you restore it).
			const quint32 frameSize = getResizeBorderThickness(hWnd);
			clientRect->top += frameSize;
			if (!isWin10OrGreater()) {
			if (!isSystemBorderEnabled()) {
			clientRect->bottom -= frameSize;
			clientRect->left += frameSize;
			clientRect->right -= frameSize;
			@@ -1843,10 +1965,11 @@
			const auto getNativeGlobalPosFromKeyboard = [hWnd]() -> POINT {
			const bool maxOrFull = IsMaximized(hWnd) \|\| isFullScreen(hWnd);
			const quint32 frameSize = getResizeBorderThickness(hWnd);
			const quint32 horizontalOffset = ((maxOrFull \|\| !isWin10OrGreater()) ? 0 : frameSize);
			const quint32 horizontalOffset =
			((maxOrFull \|\| !isSystemBorderEnabled()) ? 0 : frameSize);
			const auto verticalOffset = [hWnd, maxOrFull, frameSize]() -> quint32 {
			const quint32 titleBarHeight = getTitleBarHeight(hWnd);
			if (!isWin10OrGreater()) {
			if (!isSystemBorderEnabled()) {
			return titleBarHeight;
			}
			if (isWin11OrGreater()) {
			@@ -1923,48 +2046,4 @@
			return false;
			}

			bool Win32WindowContext::themeStuffHandler(HWND hWnd, UINT message, WPARAM wParam,
			LPARAM lParam, LRESULT *resul) {
			switch (message) {
			case WM_DPICHANGED: {
			const auto dpiX = UINT(LOWORD(wParam));
			const auto dpiY = UINT(HIWORD(wParam));

			QEvent e(QEvent::ScreenChangeInternal);
			dispatch(&e);
			break;
			}

			case WM_THEMECHANGED:
			case WM_SYSCOLORCHANGE: {
			QEvent e(QEvent::UpdateLater);
			dispatch(&e);
			break;
			}

			case WM_DWMCOLORIZATIONCOLORCHANGED: {
			const QColor color = QColor::fromRgba(wParam);
			const auto blendedWithOpacity = *reinterpret_cast<LPBOOL>(lParam);

			QEvent e(QEvent::UpdateLater);
			dispatch(&e);
			break;
			}

			case WM_SETTINGCHANGE: {
			if (!wParam && lParam &&
			std::wcscmp(reinterpret_cast<LPCWSTR>(lParam), L"ImmersiveColorSet") == 0) {
			const QColor color = getAccentColor();

			QEvent e(QEvent::UpdateLater);
			dispatch(&e);
			}
			break;
			}

			default:
			break;
			}
			return false;
			}
			}