Use brilliant workaround to show Windows 10 top border

Sine Striker

2023-12-24 46285db399f75154ad6c451e12f2cae2e59ace25

 src/core/contexts/win32windowcontext.cpp

@@ -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>
@@ -23,44 +22,16 @@
#  include <QtGui/qpa/qplatformwindow_p.h>
#endif

#include <shellscalingapi.h>
#include <dwmapi.h>
#include <timeapi.h>
#include <QWKCore/qwkconfig.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;
@@ -79,249 +50,19 @@
    // Original Qt window proc function
    static WNDPROC g_qtWindowProc = nullptr;

    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(DwmSetWindowAttribute);
        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);
            DYNAMIC_API_RESOLVE(dwmapi, DwmSetWindowAttribute);

            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) {
@@ -379,16 +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)
@@ -829,7 +561,20 @@
        return ::CallWindowProcW(g_qtWindowProc, hWnd, message, wParam, lParam);
    }

    static inline void addManagedWindow(HWND hWnd, Win32WindowContext *ctx) {
    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));
@@ -872,18 +617,24 @@
    void Win32WindowContext::virtual_hook(int id, void *data) {
        switch (id) {
            case CentralizeHook: {
                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>(windowId);
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
@@ -897,23 +648,6 @@
                return;
            }

            case WindowAttributeChangedHook: {
                auto args = static_cast<void **>(data);
                const auto &key = *static_cast<const QString *>(args[0]);
                const auto &newVar = *static_cast<const QVariant *>(args[1]);
                const auto &oldVar = *static_cast<const QVariant *>(args[2]);

                if (key == QStringLiteral("no-frame-shadow")) {
                    if (newVar.toBool()) {
                        // TODO: set off
                    } else {
                        // TODO: set on
                    }
                }

                break;
            }

            case DefaultColorsHook: {
                auto &map = *static_cast<QMap<QString, QColor> *>(data);
                map.clear();
@@ -925,6 +659,10 @@
            }

            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]);
@@ -932,7 +670,7 @@
                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)) {
@@ -952,7 +690,7 @@
                }
                painter.save();

                // We needs anti-aliasing to give us better result.
                // We need antialiasing to give us better result.
                painter.setRenderHint(QPainter::Antialiasing);

                painter.setPen(pen);
@@ -962,26 +700,65 @@
                });
                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)));
    }

    void Win32WindowContext::winIdChanged(QWindow *oldWindow) {
        removeManagedWindow(reinterpret_cast<HWND>(windowId));
    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;
        }
@@ -990,21 +767,28 @@
        auto winId = m_windowHandle->winId();
        auto hWnd = reinterpret_cast<HWND>(winId);

#if QT_VERSION < QT_VERSION_CHECK(6, 5, 0)
        for (const auto attr : {
                 _DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1,
                 _DWMWA_USE_IMMERSIVE_DARK_MODE,
             }) {
            const BOOL enable = TRUE;
            DynamicApis::instance().pDwmSetWindowAttribute(hWnd, attr, &enable, sizeof(enable));
        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);
        }
#endif

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

        // Add managed window
        addManagedWindow(hWnd, this);
        addManagedWindow(m_windowHandle, hWnd, this);

        // Cache win id
        windowId = winId;
@@ -1061,6 +845,175 @@
            }
        }
        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;
    }

    QWK_USED static constexpr const struct {
@@ -1268,6 +1221,53 @@
                const WindowPart currentWindowPart = lastHitTestResult;
                if (message == WM_NCMOUSEMOVE) {
                    if (currentWindowPart != WindowPart::ChromeButton) {
                        // 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,
@@ -1330,6 +1330,8 @@
                        // 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.

                        // Why do we need to call this function here?
                        m_delegate->resetQtGrabbedControl(m_host);
                    }
                }
@@ -1539,7 +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);
@@ -1561,7 +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
@@ -1667,7 +1669,7 @@
                break;
        }

        if (!isWin10OrGreater()) {
        if (!isSystemBorderEnabled()) {
            switch (message) {
                case WM_NCUAHDRAWCAPTION:
                case WM_NCUAHDRAWFRAME: {
@@ -1699,11 +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;
                }
@@ -1822,7 +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;
@@ -1849,6 +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
@@ -1863,7 +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;
@@ -1966,10 +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()) {