From 78f31c67d71ee743f022dd6f5930abae6f6d54f9 Mon Sep 17 00:00:00 2001
From: Yuhang Zhao <zhaoyuhang@rankyee.com>
Date: 周二, 19 12月 2023 16:43:17 +0800
Subject: [PATCH] update readme

---
 src/core/contexts/win32windowcontext.cpp |  347 +++++++++++++++++++++++++++++++++++----------------------
 1 files changed, 212 insertions(+), 135 deletions(-)

diff --git a/src/core/contexts/win32windowcontext.cpp b/src/core/contexts/win32windowcontext.cpp
index 8ed1f39..9b3e179 100644
--- a/src/core/contexts/win32windowcontext.cpp
+++ b/src/core/contexts/win32windowcontext.cpp
@@ -4,6 +4,7 @@
 
 #include <QtCore/QHash>
 #include <QtCore/QScopeGuard>
+#include <QtCore/QTimer>
 #include <QtGui/QGuiApplication>
 #include <QtGui/QPainter>
 #include <QtGui/QPalette>
@@ -26,10 +27,7 @@
 #include <dwmapi.h>
 #include <timeapi.h>
 
-#include "nativeeventfilter.h"
 #include "qwkglobal_p.h"
-
-#include "win10borderhandler_p.h"
 
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 Q_DECLARE_METATYPE(QMargins)
@@ -81,16 +79,6 @@
     // 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{};
@@ -116,6 +104,7 @@
         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);
@@ -142,6 +131,7 @@
             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);
@@ -430,8 +420,10 @@
         const auto 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);
     }
@@ -450,6 +442,9 @@
         ::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
@@ -636,7 +631,7 @@
     // 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 {
@@ -769,77 +764,7 @@
         return ::CallWindowProcW(g_qtWindowProc, hWnd, message, wParam, lParam);
     }
 
-    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();
-            }
-        }
-    }
-
-    QString Win32WindowContext::key() const {
-        return QStringLiteral("win32");
-    }
-
-    void Win32WindowContext::virtual_hook(int id, void *data) {
-        switch (id) {
-            case CentralizeHook: {
-                const auto hwnd = reinterpret_cast<HWND>(m_windowHandle->winId());
-                moveToDesktopCenter(hwnd);
-                return;
-            }
-
-            case ShowSystemMenuHook: {
-                const auto &pos = *static_cast<const QPoint *>(data);
-                auto hWnd = reinterpret_cast<HWND>(m_windowHandle->winId());
-                showSystemMenu2(hWnd, qpoint2point(pos), false,
-                                m_delegate->isHostSizeFixed(m_host));
-                return;
-            }
-
-            case DefaultColorsHook: {
-                auto map = *reinterpret_cast<QMap<QString, QColor> *>(data);
-                map.clear();
-                map.insert("activeLight", kWindowsColorSet.activeLight);
-                map.insert("activeDark", kWindowsColorSet.activeDark);
-                map.insert("inactiveLight", kWindowsColorSet.inactiveLight);
-                map.insert("inactiveDark", kWindowsColorSet.inactiveDark);
-                return;
-            }
-
-            default: {
-                // unreachable
-                break;
-            }
-        }
-        AbstractWindowContext::virtual_hook(id, data);
-    }
-
-    bool Win32WindowContext::needWin10BorderHandler() const {
-        return isWin10OrGreater() && !isWin11OrGreater();
-    }
-
-    void Win32WindowContext::setWin10BorderHandler(Win10BorderHandler *handler) {
-        win10BorderHandler.reset(handler);
-        handler->setBorderThickness(
-            int(getWindowFrameBorderThickness(reinterpret_cast<HWND>(windowId))));
-    }
-
-    bool Win32WindowContext::setupHost() {
-        // 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);
-
+    static inline void addManagedWindow(HWND hWnd, Win32WindowContext *ctx) {
         // Store original window proc
         if (!g_qtWindowProc) {
             g_qtWindowProc = reinterpret_cast<WNDPROC>(::GetWindowLongPtrW(hWnd, GWLP_WNDPROC));
@@ -851,13 +776,187 @@
         // Install global native event filter
         WindowsNativeEventFilter::install();
 
-        // Cache window ID
-        windowId = winId;
-
         // Save window handle mapping
-        g_wndProcHash->insert(hWnd, this);
+        g_wndProcHash->insert(hWnd, ctx);
+    }
 
-        return true;
+    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() {
+        if (windowId) {
+            removeManagedWindow(reinterpret_cast<HWND>(windowId));
+        }
+    }
+
+    QString Win32WindowContext::key() const {
+        return QStringLiteral("win32");
+    }
+
+    void Win32WindowContext::virtual_hook(int id, void *data) {
+        switch (id) {
+            case CentralizeHook: {
+                const auto hwnd = reinterpret_cast<HWND>(windowId);
+                moveToDesktopCenter(hwnd);
+                return;
+            }
+
+            case RaiseWindowHook: {
+                if (m_windowHandle->windowStates() & Qt::WindowMinimized)
+                    m_windowHandle->showNormal();
+
+                auto hWnd = reinterpret_cast<HWND>(windowId);
+
+                // I have no idea what this does, but it works mostly
+                // https://www.codeproject.com/Articles/1724/Some-handy-dialog-box-tricks-tips-and-workarounds
+
+                ::AttachThreadInput(::GetWindowThreadProcessId(::GetForegroundWindow(), nullptr),
+                                    ::GetCurrentThreadId(), TRUE);
+
+                ::SetForegroundWindow(hWnd);
+                ::SetFocus(hWnd);
+
+                ::AttachThreadInput(GetWindowThreadProcessId(GetForegroundWindow(), nullptr),
+                                    GetCurrentThreadId(), FALSE);
+                return;
+            }
+
+            case ShowSystemMenuHook: {
+                const auto &pos = *static_cast<const QPoint *>(data);
+                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;
+            }
+
+            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();
+                map.insert(QStringLiteral("activeLight"), kWindowsColorSet.activeLight);
+                map.insert(QStringLiteral("activeDark"), kWindowsColorSet.activeDark);
+                map.insert(QStringLiteral("inactiveLight"), kWindowsColorSet.inactiveLight);
+                map.insert(QStringLiteral("inactiveDark"), kWindowsColorSet.inactiveDark);
+                return;
+            }
+
+            case DrawWindows10BorderHook: {
+                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>(windowId);
+
+                QPen pen;
+                pen.setWidth(getWindowFrameBorderThickness(hwnd) * 2);
+
+                const bool dark = isDarkThemeActive() && isDarkWindowFrameEnabled(hwnd);
+                if (m_delegate->isWindowActive(m_host)) {
+                    if (isWindowFrameBorderColorized()) {
+                        pen.setColor(getAccentColor());
+                    } else {
+                        static QColor frameBorderActiveColorLight(kWindowsColorSet.activeLight);
+                        static QColor frameBorderActiveColorDark(kWindowsColorSet.activeDark);
+                        pen.setColor(dark ? frameBorderActiveColorDark
+                                          : frameBorderActiveColorLight);
+                    }
+                } else {
+                    static QColor frameBorderInactiveColorLight(kWindowsColorSet.inactiveLight);
+                    static QColor frameBorderInactiveColorDark(kWindowsColorSet.inactiveDark);
+                    pen.setColor(dark ? frameBorderInactiveColorDark
+                                      : frameBorderInactiveColorLight);
+                }
+                painter.save();
+
+                // We needs anti-aliasing to give us better result.
+                painter.setRenderHint(QPainter::Antialiasing);
+
+                painter.setPen(pen);
+                painter.drawLine(QLine{
+                    QPoint{0,                       0},
+                    QPoint{m_windowHandle->width(), 0}
+                });
+                painter.restore();
+                return;
+            }
+
+            default: {
+                // unreachable
+                break;
+            }
+        }
+        AbstractWindowContext::virtual_hook(id, data);
+    }
+
+    bool Win32WindowContext::needBorderPainter() const {
+        return isWin10OrGreater() && !isWin11OrGreater();
+    }
+
+    int Win32WindowContext::borderThickness() const {
+        return getWindowFrameBorderThickness(reinterpret_cast<HWND>(windowId));
+    }
+
+    void Win32WindowContext::winIdChanged(QWindow *oldWindow) {
+        removeManagedWindow(reinterpret_cast<HWND>(windowId));
+        if (!m_windowHandle) {
+            return;
+        }
+
+        // Install window hook
+        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));
+        }
+#endif
+
+        // Inform Qt we want and have set custom margins
+        updateInternalWindowFrameMargins(hWnd, m_windowHandle);
+
+        // Add managed window
+        addManagedWindow(hWnd, this);
+
+        // Cache win id
+        windowId = winId;
     }
 
     bool Win32WindowContext::windowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam,
@@ -897,12 +996,25 @@
             return true;
         }
 
+        // 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
     }
 
     QWK_USED static constexpr const struct {
-        const WPARAM wParam = 0xF1C9ADD4;
-        const LPARAM lParam = 0xAFB6F4C6;
+        const WPARAM wParam = MAKEWPARAM(44500, 61897);
+        const LPARAM lParam = MAKELPARAM(62662, 44982); // Not used. Reserve for future use.
     } kMessageTag;
 
     static inline quint64 getKeyState() {
@@ -1105,7 +1217,7 @@
                 const WindowPart currentWindowPart = lastHitTestResult;
                 if (message == WM_NCMOUSEMOVE) {
                     if (currentWindowPart != WindowPart::ChromeButton) {
-                        m_delegate->resetQtGrabbedControl();
+                        m_delegate->resetQtGrabbedControl(m_host);
                         if (mouseLeaveBlocked) {
                             emulateClientAreaMessage(hWnd, message, wParam, lParam,
                                                      WM_NCMOUSELEAVE);
@@ -1167,7 +1279,7 @@
                         // 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();
+                        m_delegate->resetQtGrabbedControl(m_host);
                     }
                 }
                 break;
@@ -1187,7 +1299,7 @@
                     // 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);
                     }
@@ -1492,9 +1604,10 @@
                 // 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;
@@ -1881,42 +1994,6 @@
             return true;
         }
         return false;
-    }
-
-    void Win10BorderHandler::paintBorder(QPainter &painter, const QRect &rect,
-                                         const QRegion &region) {
-        Q_UNUSED(rect)
-        Q_UNUSED(region)
-
-        QPen pen;
-        pen.setWidth(m_borderThickness * 2);
-
-        const bool dark = isDarkThemeActive() &&
-                          isDarkWindowFrameEnabled(reinterpret_cast<HWND>(m_window->winId()));
-        if (isActive()) {
-            if (isWindowFrameBorderColorized()) {
-                pen.setColor(getAccentColor());
-            } else {
-                static QColor frameBorderActiveColorLight(kWindowsColorSet.activeLight);
-                static QColor frameBorderActiveColorDark(kWindowsColorSet.activeDark);
-                pen.setColor(dark ? frameBorderActiveColorDark : frameBorderActiveColorLight);
-            }
-        } else {
-            static QColor frameBorderInactiveColorLight(kWindowsColorSet.inactiveLight);
-            static QColor frameBorderInactiveColorDark(kWindowsColorSet.inactiveDark);
-            pen.setColor(dark ? frameBorderInactiveColorDark : frameBorderInactiveColorLight);
-        }
-        painter.save();
-
-        // ### TODO: do we need to enable or disable it?
-        painter.setRenderHint(QPainter::Antialiasing);
-
-        painter.setPen(pen);
-        painter.drawLine(QLine{
-            QPoint{0,                 0},
-            QPoint{m_window->width(), 0}
-        });
-        painter.restore();
     }
 
 }

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