From 9ec0be3dabf01ccd2cda2f088ed5bede396f2c56 Mon Sep 17 00:00:00 2001
From: Yuhang Zhao <zhaoyuhang@rankyee.com>
Date: 周一, 04 12月 2023 14:59:53 +0800
Subject: [PATCH] wip
---
src/core/contexts/win32windowcontext.cpp | 472 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 452 insertions(+), 20 deletions(-)
diff --git a/src/core/contexts/win32windowcontext.cpp b/src/core/contexts/win32windowcontext.cpp
index a901cae..7c50d84 100644
--- a/src/core/contexts/win32windowcontext.cpp
+++ b/src/core/contexts/win32windowcontext.cpp
@@ -5,19 +5,225 @@
#include <QtCore/QHash>
#include <QtCore/QAbstractNativeEventFilter>
#include <QtCore/QCoreApplication>
+#include <QtCore/QOperatingSystemVersion>
+#include <QtCore/private/qsystemlibrary_p.h>
#include <QtGui/private/qhighdpiscaling_p.h>
#include "qwkcoreglobal_p.h"
+#include <shellscalingapi.h>
+#include <dwmapi.h>
+
namespace QWK {
+
+ static constexpr const auto kAutoHideTaskBarThickness = quint8{ 2 }; // The thickness of an auto-hide taskbar in pixels.
using WndProcHash = QHash<HWND, Win32WindowContext *>; // hWnd -> context
Q_GLOBAL_STATIC(WndProcHash, g_wndProcHash);
static WNDPROC g_qtWindowProc = nullptr; // Original Qt window proc function
+ struct DynamicApis {
+ decltype(&::DwmFlush) pDwmFlush = nullptr;
+ decltype(&::GetDpiForWindow) pGetDpiForWindow = nullptr;
+ decltype(&::GetSystemMetricsForDpi) pGetSystemMetricsForDpi = nullptr;
+ decltype(&::GetDpiForMonitor) pGetDpiForMonitor = nullptr;
+
+ DynamicApis() {
+ QSystemLibrary user32(QStringLiteral("user32.dll"));
+ pGetDpiForWindow = reinterpret_cast<decltype(pGetDpiForWindow)>(user32.resolve("GetDpiForWindow"));
+ pGetSystemMetricsForDpi = reinterpret_cast<decltype(pGetSystemMetricsForDpi)>(user32.resolve("GetSystemMetricsForDpi"));
+
+ QSystemLibrary shcore(QStringLiteral("shcore.dll"));
+ pGetDpiForMonitor = reinterpret_cast<decltype(pGetDpiForMonitor)>(shcore.resolve("GetDpiForMonitor"));
+
+ QSystemLibrary dwmapi(QStringLiteral("dwmapi.dll"));
+ pDwmFlush = reinterpret_cast<decltype(pDwmFlush)>(dwmapi.resolve("DwmFlush"));
+ }
+
+ ~DynamicApis() = default;
+
+ static const DynamicApis &instance() {
+ static const DynamicApis inst{};
+ return inst;
+ }
+
+ private:
+ 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(const HWND hwnd)
+ {
+ // NULL handle is allowed here.
+ return hwnd2str(reinterpret_cast<WId>(hwnd));
+ }
+
+ static inline bool isWin8Point1OrGreater() {
+ static const bool result = QOperatingSystemVersion::current() >= QOperatingSystemVersion::Windows8_1;
+ return result;
+ }
+
+ static inline bool isWin10OrGreater() {
+ static const bool result = QOperatingSystemVersion::current() >= QOperatingSystemVersion::Windows10;
+ return result;
+ }
+
+ static inline quint32 getDpiForWindow(const HWND hwnd) {
+ Q_ASSERT(hwnd);
+ if (!hwnd) {
+ return USER_DEFAULT_SCREEN_DPI;
+ }
+ const DynamicApis &apis = DynamicApis::instance();
+ if (apis.pGetDpiForWindow) { // Win10
+ return apis.pGetDpiForWindow(hwnd);
+ } else if (apis.pGetDpiForMonitor) { // Win8.1
+ const HMONITOR monitor = ::MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
+ UINT dpiX{ USER_DEFAULT_SCREEN_DPI };
+ UINT dpiY{ USER_DEFAULT_SCREEN_DPI };
+ apis.pGetDpiForMonitor(monitor, MDT_EFFECTIVE_DPI, &dpiX, &dpiY);
+ return dpiX;
+ } else { // Win2K
+ const HDC hdc = ::GetDC(nullptr);
+ const int dpiX = ::GetDeviceCaps(hdc, LOGPIXELSX);
+ const int dpiY = ::GetDeviceCaps(hdc, LOGPIXELSY);
+ ::ReleaseDC(nullptr, hdc);
+ return quint32(dpiX);
+ }
+ }
+
+ static inline quint32 getResizeBorderThickness(const HWND hwnd) {
+ Q_ASSERT(hwnd);
+ if (!hwnd) {
+ return 0;
+ }
+ const DynamicApis &apis = DynamicApis::instance();
+ if (apis.pGetSystemMetricsForDpi) {
+ const quint32 dpi = getDpiForWindow(hwnd);
+ return apis.pGetSystemMetricsForDpi(SM_CXSIZEFRAME, dpi) + apis.pGetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi);
+ } else {
+ return ::GetSystemMetrics(SM_CXSIZEFRAME) + ::GetSystemMetrics(SM_CXPADDEDBORDER);
+ }
+ }
+
+ static inline std::optional<MONITORINFOEXW> getMonitorForWindow(const HWND hwnd)
+ {
+ Q_ASSERT(hwnd);
+ if (!hwnd) {
+ return std::nullopt;
+ }
+ // Use "MONITOR_DEFAULTTONEAREST" here so that we can still get the correct
+ // monitor even if the window is minimized.
+ const HMONITOR monitor = ::MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
+ MONITORINFOEXW monitorInfo{};
+ monitorInfo.cbSize = sizeof(monitorInfo);
+ ::GetMonitorInfoW(monitor, &monitorInfo);
+ return monitorInfo;
+ };
+
+ static inline bool isFullScreen(const HWND hwnd) {
+ Q_ASSERT(hwnd);
+ if (!hwnd) {
+ return false;
+ }
+ RECT windowRect{};
+ ::GetWindowRect(hwnd, &windowRect);
+ const std::optional<MONITORINFOEXW> mi = getMonitorForWindow(hwnd);
+ // Compare to the full area of the screen, not the work area.
+ return (windowRect == mi.value_or(MONITORINFOEXW{}).rcMonitor);
+ }
+
static inline QPoint fromNativeLocalPosition(const QWindow *window, const QPoint &point) {
+ Q_ASSERT(window);
+ if (!window) {
+ return point;
+ }
#if 1
return QHighDpi::fromNativeLocalPosition(point, window);
#else
@@ -60,11 +266,11 @@
return false;
}
const LONG_PTR styles = ::GetWindowLongPtrW(hwnd, GWL_STYLE);
- if ((styles == 0) || (styles & WS_DISABLED)) {
+ if (styles & WS_DISABLED) {
return false;
}
const LONG_PTR exStyles = ::GetWindowLongPtrW(hwnd, GWL_EXSTYLE);
- if ((exStyles == 0) || (exStyles & WS_EX_TOOLWINDOW)) {
+ if (exStyles & WS_EX_TOOLWINDOW) {
return false;
}
RECT rect = {0, 0, 0, 0};
@@ -98,6 +304,11 @@
public:
bool nativeEventFilter(const QByteArray &eventType, void *message,
QT_NATIVE_EVENT_RESULT_TYPE *result) override {
+ // It has been observed that the pointer that Qt gives us is sometimes null on some machines.
+ // We need to guard against it in such scenarios.
+ if (!result) {
+ return false;
+ }
if (lastMessageHandled) {
*result = static_cast<QT_NATIVE_EVENT_RESULT_TYPE>(lastMessageResult);
return true;
@@ -274,11 +485,10 @@
return true;
}
- // TODO: Uncomment and do something
- // bool frameBorderVisible = Utils::isWindowFrameBorderVisible();
-
- // TODO: Implement
- // ...
+ // Main implementation
+ if (customWindowHandler(hWnd, message, wParam, lParam, result)) {
+ return true;
+ }
return false; // Not handled
}
@@ -289,7 +499,7 @@
return (wParam == kMessageTag);
}
- static quint64 getKeyState() {
+ static inline quint64 getKeyState() {
quint64 result = 0;
const auto &get = [](const int virtualKey) -> bool {
return (::GetAsyncKeyState(virtualKey) < 0);
@@ -343,9 +553,7 @@
}
const auto screenPos = POINT{GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)};
POINT clientPos = screenPos;
- if (::ScreenToClient(hWnd, &clientPos) == FALSE) {
- return 0;
- }
+ ::ScreenToClient(hWnd, &clientPos);
return MAKELPARAM(clientPos.x, clientPos.y);
}();
#if 0
@@ -413,9 +621,8 @@
#undef SEND_MESSAGE
}
- static bool requestForMouseLeaveMessage(HWND hWnd, bool nonClient) {
- TRACKMOUSEEVENT tme;
- SecureZeroMemory(&tme, sizeof(tme));
+ static inline void requestForMouseLeaveMessage(HWND hWnd, bool nonClient) {
+ TRACKMOUSEEVENT tme{};
tme.cbSize = sizeof(tme);
tme.dwFlags = TME_LEAVE;
if (nonClient) {
@@ -423,10 +630,7 @@
}
tme.hwndTrack = hWnd;
tme.dwHoverTime = HOVER_DEFAULT;
- if (::TrackMouseEvent(&tme) == FALSE) {
- return false;
- }
- return true;
+ ::TrackMouseEvent(&tme);
}
bool Win32WindowContext::snapLayoutHandler(HWND hWnd, UINT message, WPARAM wParam,
@@ -466,7 +670,7 @@
// WM_MOUSELEAVE.
if (lastHitTestResult != WindowPart::ChromeButton && mouseLeaveBlocked) {
mouseLeaveBlocked = false;
- std::ignore = requestForMouseLeaveMessage(hWnd, false);
+ requestForMouseLeaveMessage(hWnd, false);
}
break;
}
@@ -541,7 +745,7 @@
// in advance.
if (mouseLeaveBlocked) {
mouseLeaveBlocked = false;
- std::ignore = requestForMouseLeaveMessage(hWnd, false);
+ requestForMouseLeaveMessage(hWnd, false);
}
} else {
if (mouseLeaveBlocked) {
@@ -567,4 +771,232 @@
return false;
}
+ bool Win32WindowContext::customWindowHandler(HWND hWnd, UINT message, WPARAM wParam,
+ LPARAM lParam, LRESULT *result)
+ {
+ switch (message) {
+ case WM_NCCALCSIZE: {
+ // Windows鏄牴鎹繖涓秷鎭殑杩斿洖鍊兼潵璁剧疆绐楀彛鐨勫鎴峰尯锛堢獥鍙ｄ腑鐪熸鏄剧ず鐨勫唴瀹癸級
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+
+ // Sent when the size and position of a window's client area must be
+ // calculated. By processing this message, an application can
+ // control the content of the window's client area when the size or
+ // position of the window changes. If wParam is TRUE, lParam points
+ // to an NCCALCSIZE_PARAMS structure that contains information an
+ // application can use to calculate the new size and position of the
+ // client rectangle. If wParam is FALSE, lParam points to a RECT
+ // structure. On entry, the structure contains the proposed window
+ // rectangle for the window. On exit, the structure should contain
+ // the screen coordinates of the corresponding window client area.
+ // The client area is the window's content area, the non-client area
+ // is the area which is provided by the system, such as the title
+ // bar, the four window borders, the frame shadow, the menu bar, the
+ // status bar, the scroll bar, etc. But for Qt, it draws most of the
+ // window area (client + non-client) itself. We now know that the
+ // title bar and the window frame is in the non-client area and we
+ // can set the scope of the client area in this message, so we can
+ // remove the title bar and the window frame by let the non-client
+ // area be covered by the client area (because we can't really get
+ // rid of the non-client area, it will always be there, all we can
+ // do is to hide it) , which means we should let the client area's
+ // size the same with the whole window's size. So there is no room
+ // for the non-client area and then the user won't be able to see it
+ // again. But how to achieve this? Very easy, just leave lParam (the
+ // re-calculated client area) untouched. But of course you can
+ // modify lParam, then the non-client area will be seen and the
+ // window borders and the window frame will show up. However, things
+ // are quite different when you try to modify the top margin of the
+ // client area. DWM will always draw the whole title bar no matter
+ // what margin value you set for the top, unless you don't modify it
+ // and remove the whole top area (the title bar + the one pixel
+ // height window border). This can be confirmed in Windows
+ // Terminal's source code, you can also try yourself to verify
+ // it. So things will become quite complicated if you want to
+ // preserve the four window borders.
+
+ // If `wParam` is `FALSE`, `lParam` points to a `RECT` that contains
+ // the proposed window rectangle for our window. During our
+ // processing of the `WM_NCCALCSIZE` message, we are expected to
+ // modify the `RECT` that `lParam` points to, so that its value upon
+ // our return is the new client area. We must return 0 if `wParam`
+ // is `FALSE`.
+ // If `wParam` is `TRUE`, `lParam` points to a `NCCALCSIZE_PARAMS`
+ // struct. This struct contains an array of 3 `RECT`s, the first of
+ // which has the exact same meaning as the `RECT` that is pointed to
+ // by `lParam` when `wParam` is `FALSE`. The remaining `RECT`s, in
+ // conjunction with our return value, can
+ // be used to specify portions of the source and destination window
+ // rectangles that are valid and should be preserved. We opt not to
+ // implement an elaborate client-area preservation technique, and
+ // simply return 0, which means "preserve the entire old client area
+ // and align it with the upper-left corner of our new client area".
+ const auto clientRect = ((wParam == FALSE) ? reinterpret_cast<LPRECT>(lParam) : &(reinterpret_cast<LPNCCALCSIZE_PARAMS>(lParam))->rgrc[0]);
+ if (isWin10OrGreater()) {
+ // Store the original top margin before the default window procedure applies the default frame.
+ const LONG originalTop = clientRect->top;
+ // Apply the default frame because we don't want to remove the whole window frame,
+ // we still need the standard window frame (the resizable frame border and the frame
+ // shadow) for the left, bottom and right edges.
+ // If we return 0 here directly, the whole window frame will be removed (which means
+ // there will be no resizable frame border and the frame shadow will also disappear),
+ // and that's also how most applications customize their title bars on Windows. It's
+ // totally OK but since we want to preserve as much original frame as possible, we
+ // can't use that solution.
+ const LRESULT hitTestResult = ::DefWindowProcW(hWnd, WM_NCCALCSIZE, wParam, lParam);
+ if ((hitTestResult != HTERROR) && (hitTestResult != HTNOWHERE)) {
+ *result = hitTestResult;
+ return true;
+ }
+ // Re-apply the original top from before the size of the default frame was applied,
+ // and the whole top frame (the title bar and the top border) is gone now.
+ // For the top frame, we only has 2 choices: (1) remove the top frame entirely, or
+ // (2) don't touch it at all. We can't preserve the top border by adjusting the top
+ // margin here. If we try to modify the top margin, the original title bar will
+ // always be painted by DWM regardless what margin we set, so here we can only remove
+ // the top frame entirely and use some special 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
+ // have the WS_POPUP size, so we don't have to worry about
+ // borders, and the default frame will be fine.
+ if (max && !full) {
+ // When a window is maximized, its size is actually a little bit more
+ // than the monitor's work area. The window is positioned and sized in
+ // such a way that the resize handles are outside the monitor and
+ // then the window is clipped to the monitor so that the resize handle
+ // do not appear because you don't need them (because you can't resize
+ // a window when it's maximized unless you restore it).
+ const quint32 frameSize = getResizeBorderThickness(hWnd);
+ clientRect->top += frameSize;
+ if (!isWin10OrGreater()) {
+ clientRect->bottom -= frameSize;
+ clientRect->left += frameSize;
+ clientRect->right -= frameSize;
+ }
+ }
+ // Attempt to detect if there's an autohide taskbar, and if
+ // there is, reduce our size a bit on the side with the taskbar,
+ // so the user can still mouse-over the taskbar to reveal it.
+ // Make sure to use MONITOR_DEFAULTTONEAREST, so that this will
+ // still find the right monitor even when we're restoring from
+ // minimized.
+ if (max || full) {
+ APPBARDATA abd;
+ SecureZeroMemory(&abd, sizeof(abd));
+ abd.cbSize = sizeof(abd);
+ const UINT taskbarState = ::SHAppBarMessage(ABM_GETSTATE, &abd);
+ // First, check if we have an auto-hide taskbar at all:
+ if (taskbarState & ABS_AUTOHIDE) {
+ bool top = false, bottom = false, left = false, right = false;
+ // Due to ABM_GETAUTOHIDEBAREX was introduced in Windows 8.1,
+ // we have to use another way to judge this if we are running
+ // on Windows 7 or Windows 8.
+ if (isWin8Point1OrGreater()) {
+ const std::optional<MONITORINFOEXW> monitorInfo = getMonitorForWindow(hWnd);
+ const RECT monitorRect = monitorInfo.value().rcMonitor;
+ // This helper can be used to determine if there's an
+ // auto-hide taskbar on the given edge of the monitor
+ // we're currently on.
+ const auto hasAutohideTaskbar = [monitorRect](const UINT edge) -> bool {
+ APPBARDATA abd2{};
+ abd2.cbSize = sizeof(abd2);
+ abd2.uEdge = edge;
+ abd2.rc = monitorRect;
+ const auto hTaskbar = reinterpret_cast<HWND>(::SHAppBarMessage(ABM_GETAUTOHIDEBAREX, &abd2));
+ return (hTaskbar != nullptr);
+ };
+ top = hasAutohideTaskbar(ABE_TOP);
+ bottom = hasAutohideTaskbar(ABE_BOTTOM);
+ left = hasAutohideTaskbar(ABE_LEFT);
+ right = hasAutohideTaskbar(ABE_RIGHT);
+ } else {
+ int edge = -1;
+ APPBARDATA abd2{};
+ abd2.cbSize = sizeof(abd2);
+ abd2.hWnd = ::FindWindowW(L"Shell_TrayWnd", nullptr);
+ const HMONITOR windowMonitor = ::MonitorFromWindow(hWnd, MONITOR_DEFAULTTONEAREST);
+ const HMONITOR taskbarMonitor = ::MonitorFromWindow(abd2.hWnd, MONITOR_DEFAULTTOPRIMARY);
+ if (taskbarMonitor == windowMonitor) {
+ ::SHAppBarMessage(ABM_GETTASKBARPOS, &abd2);
+ edge = abd2.uEdge;
+ }
+ top = (edge == ABE_TOP);
+ bottom = (edge == ABE_BOTTOM);
+ left = (edge == ABE_LEFT);
+ right = (edge == ABE_RIGHT);
+ }
+ // If there's a taskbar on any side of the monitor, reduce
+ // our size a little bit on that edge.
+ // Note to future code archeologists:
+ // This doesn't seem to work for fullscreen on the primary
+ // display. However, testing a bunch of other apps with
+ // fullscreen modes and an auto-hiding taskbar has
+ // shown that _none_ of them reveal the taskbar from
+ // fullscreen mode. This includes Edge, Firefox, Chrome,
+ // Sublime Text, PowerPoint - none seemed to support this.
+ // This does however work fine for maximized.
+ if (top) {
+ // Peculiarly, when we're fullscreen,
+ clientRect->top += kAutoHideTaskBarThickness;
+ } else if (bottom) {
+ clientRect->bottom -= kAutoHideTaskBarThickness;
+ } else if (left) {
+ clientRect->left += kAutoHideTaskBarThickness;
+ } else if (right) {
+ clientRect->right -= kAutoHideTaskBarThickness;
+ }
+ }
+ }
+ // ### TODO: std::ignore = Utils::syncWmPaintWithDwm(); // This should be executed at the very last.
+ // By returning WVR_REDRAW we can make the window resizing look less broken.
+ // But we must return 0 if wParam is FALSE, according to Microsoft Docs.
+ // **IMPORTANT NOTE**:
+ // If you are drawing something manually through D3D in your window, don't
+ // try to return WVR_REDRAW here, otherwise Windows exhibits bugs where
+ // client pixels and child windows are mispositioned by the width/height
+ // of the upper-left non-client area. It's confirmed that this issue exists
+ // from Windows 7 to Windows 10. Not tested on Windows 11 yet. Don't know
+ // whether it exists on Windows XP to Windows Vista or not.
+ *result = wParam == FALSE ? FALSE : WVR_REDRAW;
+ return true;
+ }
+ default:
+ break;
+ }
+ return false;
+ }
+
}
\ No newline at end of file
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