// Copyright (C) 2023-2024 Stdware Collections (https://www.github.com/stdware)
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// Copyright (C) 2021-2023 wangwenx190 (Yuhang Zhao)
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// SPDX-License-Identifier: Apache-2.0
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#ifndef WINDOWS10BORDERHANDLER_P_H
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#define WINDOWS10BORDERHANDLER_P_H
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//
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// W A R N I N G !!!
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// -----------------
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//
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// This file is not part of the QWindowKit API. It is used purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or may even be removed.
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//
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#include <QtGui/QWindow>
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#include <QtGui/QMouseEvent>
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#include <QWKCore/qwindowkit_windows.h>
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#include <QWKCore/private/qwkglobal_p.h>
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#include <QWKCore/private/abstractwindowcontext_p.h>
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namespace QWK {
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class Windows10BorderHandler : public NativeEventFilter, public SharedEventFilter {
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public:
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inline Windows10BorderHandler(AbstractWindowContext *ctx) : ctx(ctx) {
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ctx->installNativeEventFilter(this);
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ctx->installSharedEventFilter(this);
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}
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inline void setupNecessaryAttributes() {
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if (!isWin11OrGreater()) {
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// https://github.com/microsoft/terminal/blob/71a6f26e6ece656084e87de1a528c4a8072eeabd/src/cascadia/WindowsTerminal/NonClientIslandWindow.cpp#L940
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// Must extend top frame to client area
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static QVariant defaultMargins = QVariant::fromValue(QMargins(0, 1, 0, 0));
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ctx->setWindowAttribute(QStringLiteral("extra-margins"), defaultMargins);
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}
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// Enable dark mode by default, otherwise the system borders are white
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ctx->setWindowAttribute(QStringLiteral("dark-mode"), true);
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}
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inline bool isNormalWindow() const {
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return !(ctx->window()->windowStates() &
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(Qt::WindowMinimized | Qt::WindowMaximized | Qt::WindowFullScreen));
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}
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inline void drawBorderEmulated(QPainter *painter, const QRect &rect) {
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QRegion region(rect);
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void *args[] = {
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painter,
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const_cast<QRect *>(&rect),
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®ion,
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};
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ctx->virtual_hook(AbstractWindowContext::DrawWindows10BorderHook_Emulated, args);
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}
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inline void drawBorderNative() {
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ctx->virtual_hook(AbstractWindowContext::DrawWindows10BorderHook_Native, nullptr);
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}
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inline int borderThickness() const {
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return ctx->windowAttribute(QStringLiteral("border-thickness")).toInt();
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}
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inline void updateExtraMargins(bool windowActive) {
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if (isWin11OrGreater()) {
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return;
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}
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// ### FIXME: transparent seam
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if (windowActive) {
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// Restore margins when the window is active
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static QVariant defaultMargins = QVariant::fromValue(QMargins(0, 1, 0, 0));
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ctx->setWindowAttribute(QStringLiteral("extra-margins"), defaultMargins);
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return;
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}
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// https://github.com/microsoft/terminal/blob/71a6f26e6ece656084e87de1a528c4a8072eeabd/src/cascadia/WindowsTerminal/NonClientIslandWindow.cpp#L904
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// When the window is inactive, there is a transparency bug in the top
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// border, and we need to extend the non-client area to the whole title
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// bar.
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QRect frame = ctx->windowAttribute(QStringLiteral("window-rect")).toRect();
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QMargins margins{0, -frame.top(), 0, 0};
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ctx->setWindowAttribute(QStringLiteral("extra-margins"), QVariant::fromValue(margins));
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}
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virtual void updateGeometry() = 0;
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virtual bool isWindowActive() const {
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return ctx->window()->isActive();
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}
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protected:
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bool nativeEventFilter(const QByteArray &eventType, void *message,
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QT_NATIVE_EVENT_RESULT_TYPE *result) override {
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Q_UNUSED(eventType)
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const auto msg = static_cast<const MSG *>(message);
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switch (msg->message) {
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case WM_DPICHANGED: {
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updateGeometry();
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updateExtraMargins(isWindowActive());
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break;
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}
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case WM_ACTIVATE: {
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updateExtraMargins(LOWORD(msg->wParam) != WA_INACTIVE);
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break;
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}
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case WM_THEMECHANGED:
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case WM_SYSCOLORCHANGE:
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case WM_DWMCOLORIZATIONCOLORCHANGED: {
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// If we do not refresh this property, the native border will turn white
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// permanently (like the dark mode is turned off) after the user changes
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// the accent color in system personalization settings.
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// So we need this ugly hack to re-apply dark mode to get rid of this
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// strange Windows bug.
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if (ctx->windowAttribute(QStringLiteral("dark-mode")).toBool()) {
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ctx->setWindowAttribute(QStringLiteral("dark-mode"), true);
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}
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break;
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}
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default:
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break;
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}
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return false;
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}
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bool sharedEventFilter(QObject *obj, QEvent *event) override {
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Q_UNUSED(obj)
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if (event->type() == QEvent::WinIdChange) {
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if (ctx->windowId()) {
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setupNecessaryAttributes();
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updateGeometry();
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}
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}
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return false;
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}
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protected:
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AbstractWindowContext *ctx;
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};
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}
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#endif // WINDOWS10BORDERHANDLER_P_H
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