From 5bfd136473edc506b860177bf88626e35a5a1ba4 Mon Sep 17 00:00:00 2001
From: SineStriker <trueful@163.com>
Date: 摹曛, 28 12月 2023 12:06:54 +0800
Subject: [PATCH] Add mac blur view

---
 src/core/contexts/cocoawindowcontext.mm |  560 +++++++++++++++++++++++++++++++++++++++++++------------
 1 files changed, 439 insertions(+), 121 deletions(-)

diff --git a/src/core/contexts/cocoawindowcontext.mm b/src/core/contexts/cocoawindowcontext.mm
index edd2c3a..54a3dbe 100644
--- a/src/core/contexts/cocoawindowcontext.mm
+++ b/src/core/contexts/cocoawindowcontext.mm
@@ -3,80 +3,280 @@
 #include <objc/runtime.h>
 #include <AppKit/AppKit.h>
 
+#include <Cocoa/Cocoa.h>
+
 #include <QtGui/QGuiApplication>
+
+#include "qwkglobal_p.h"
+#include "systemwindow_p.h"
 
 namespace QWK {
 
-    struct NSWindowProxy {
+    struct NSWindowProxy;
+
+    using ProxyList = QHash<WId, NSWindowProxy *>;
+    Q_GLOBAL_STATIC(ProxyList, g_proxyList);
+
+    using ProxyList2 = QHash<NSWindow *, NSWindowProxy *>;
+    Q_GLOBAL_STATIC(ProxyList2, g_proxyIndexes);
+
+}
+
+struct QWK_NSWindowDelegate {
+public:
+    virtual ~QWK_NSWindowDelegate() = default;
+    virtual void windowWillEnterFullScreen(){};
+    virtual void windowDidEnterFullScreen(){};
+    virtual void windowWillExitFullScreen(){};
+    virtual void windowDidExitFullScreen(){};
+    virtual void windowDidResize(){};
+};
+
+//
+// Objective C++ Begin
+//
+
+@interface QWK_NSWindowObserver : NSObject {
+}
+@end
+
+@implementation QWK_NSWindowObserver
+
+- (id)init {
+    self = [super init];
+    if (self) {
+        [[NSNotificationCenter defaultCenter] addObserver:self
+                                                 selector:@selector(windowWillEnterFullScreen:)
+                                                     name:NSWindowWillEnterFullScreenNotification
+                                                   object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:self
+                                                 selector:@selector(windowDidEnterFullScreen:)
+                                                     name:NSWindowDidEnterFullScreenNotification
+                                                   object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:self
+                                                 selector:@selector(windowWillExitFullScreen:)
+                                                     name:NSWindowWillExitFullScreenNotification
+                                                   object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:self
+                                                 selector:@selector(windowDidExitFullScreen:)
+                                                     name:NSWindowDidExitFullScreenNotification
+                                                   object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:self
+                                                 selector:@selector(windowDidResize:)
+                                                     name:NSWindowDidResizeNotification
+                                                   object:nil];
+    }
+    return self;
+}
+
+- (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+    [super dealloc];
+}
+
+- (void)windowWillEnterFullScreen:(NSNotification *)notification {
+    auto nswindow = reinterpret_cast<NSWindow *>(notification.object);
+    if (auto proxy = QWK::g_proxyIndexes->value(nswindow)) {
+        reinterpret_cast<QWK_NSWindowDelegate *>(proxy)->windowWillEnterFullScreen();
+    }
+}
+
+- (void)windowDidEnterFullScreen:(NSNotification *)notification {
+    auto nswindow = reinterpret_cast<NSWindow *>(notification.object);
+    if (auto proxy = QWK::g_proxyIndexes->value(nswindow)) {
+        reinterpret_cast<QWK_NSWindowDelegate *>(proxy)->windowDidEnterFullScreen();
+    }
+}
+
+- (void)windowWillExitFullScreen:(NSNotification *)notification {
+    auto nswindow = reinterpret_cast<NSWindow *>(notification.object);
+    if (auto proxy = QWK::g_proxyIndexes->value(nswindow)) {
+        reinterpret_cast<QWK_NSWindowDelegate *>(proxy)->windowWillExitFullScreen();
+    }
+}
+
+- (void)windowDidExitFullScreen:(NSNotification *)notification {
+    auto nswindow = reinterpret_cast<NSWindow *>(notification.object);
+    if (auto proxy = QWK::g_proxyIndexes->value(nswindow)) {
+        reinterpret_cast<QWK_NSWindowDelegate *>(proxy)->windowDidExitFullScreen();
+    }
+}
+
+- (void)windowDidResize:(NSNotification *)notification {
+    auto nswindow = reinterpret_cast<NSWindow *>(notification.object);
+    if (auto proxy = QWK::g_proxyIndexes->value(nswindow)) {
+        reinterpret_cast<QWK_NSWindowDelegate *>(proxy)->windowDidResize();
+    }
+}
+
+@end
+
+//
+// Objective C++ End
+//
+
+namespace QWK {
+
+    struct NSWindowProxy : public QWK_NSWindowDelegate {
+        enum class BlurMode {
+            Dark,
+            Light,
+            None,
+        };
+
         NSWindowProxy(NSWindow *macWindow) {
-            if (instances.contains(macWindow)) {
+            nswindow = macWindow;
+            g_proxyIndexes->insert(nswindow, this);
+        }
+
+        ~NSWindowProxy() override {
+            if (blurEffect) {
+                setBlurEffect(BlurMode::None);
+            }
+            g_proxyIndexes->remove(nswindow);
+        }
+
+        void windowWillEnterFullScreen() override {
+        }
+
+        void windowDidEnterFullScreen() override {
+        }
+
+        void windowWillExitFullScreen() override {
+            if (systemButtonRect.isEmpty() || !systemButtonVisible)
+                return;
+
+            // The system buttons will stuck at their default positions when the exit-fullscreen
+            // animation is running, we need to hide them until the animation finishes
+            for (const auto &button : systemButtons()) {
+                button.hidden = true;
+            }
+        }
+
+        void windowDidExitFullScreen() override {
+            if (systemButtonRect.isEmpty() || !systemButtonVisible)
+                return;
+
+            for (const auto &button : systemButtons()) {
+                button.hidden = false;
+            }
+            updateSystemButtonRect();
+        }
+
+        void windowDidResize() override {
+            if (blurEffect) {
+                updateBlurEffectSize();
+            }
+
+            if (systemButtonRect.isEmpty() || !systemButtonVisible) {
                 return;
             }
-            nswindow = macWindow;
-            instances.insert(macWindow, this);
-            if (!windowClass) {
-                windowClass = [nswindow class];
-                replaceImplementations();
+            updateSystemButtonRect();
+        }
+
+        void setSystemButtonVisible(bool visible) {
+            systemButtonVisible = visible;
+            for (const auto &button : systemButtons()) {
+                button.hidden = !visible;
+            }
+
+            if (systemButtonRect.isEmpty() || !visible) {
+                return;
+            }
+            updateSystemButtonRect();
+        }
+
+        void setSystemButtonRect(const QRect &rect) {
+            systemButtonRect = rect;
+
+            if (rect.isEmpty() || !systemButtonVisible) {
+                return;
+            }
+            updateSystemButtonRect();
+        }
+
+        void updateSystemButtonRect() {
+            // https://forgetsou.github.io/2020/11/06/macos%E5%BC%80%E5%8F%91-%E5%85%B3%E9%97%AD-%E6%9C%80%E5%B0%8F%E5%8C%96-%E5%85%A8%E5%B1%8F%E5%B1%85%E4%B8%AD%E5%A4%84%E7%90%86(%E4%BB%BFMac%20QQ)/
+
+            const auto &buttons = systemButtons();
+            const auto &leftButton = buttons[0];
+            const auto &midButton = buttons[1];
+            const auto &rightButton = buttons[2];
+
+            auto spacing = midButton.frame.origin.x - leftButton.frame.origin.x;
+            auto width = midButton.frame.size.width;
+            auto height = midButton.frame.size.height;
+
+            QPoint center = systemButtonRect.center();
+
+            // Mid button
+            NSPoint centerOrigin = {
+                center.x() - width / 2,
+                center.y() - height / 2,
+            };
+            [midButton setFrameOrigin:centerOrigin];
+
+            // Left button
+            NSPoint leftOrigin = {
+                centerOrigin.x - spacing,
+                centerOrigin.y,
+            };
+            [leftButton setFrameOrigin:leftOrigin];
+
+            // Right button
+            NSPoint rightOrigin = {
+                centerOrigin.x + spacing,
+                centerOrigin.y,
+            };
+            [rightButton setFrameOrigin:rightOrigin];
+        }
+
+        inline std::array<NSButton *, 3> systemButtons() {
+            NSButton *closeBtn = [nswindow standardWindowButton:NSWindowCloseButton];
+            NSButton *minimizeBtn = [nswindow standardWindowButton:NSWindowMiniaturizeButton];
+            NSButton *zoomBtn = [nswindow standardWindowButton:NSWindowZoomButton];
+            return {closeBtn, minimizeBtn, zoomBtn};
+        }
+
+        void setBlurEffect(BlurMode option) {
+            if (option == BlurMode::None) {
+                if (!blurEffect) {
+                    return;
+                }
+                [blurEffect removeFromSuperview];
+                [blurEffect release];
+                blurEffect = nil;
+            } else {
+                if (!blurEffect) {
+                    NSView *const view = [nswindow contentView];
+                    NSVisualEffectView *const blurView =
+                        [[visualEffectViewClass alloc] initWithFrame:view.bounds];
+                    blurView.material = NSVisualEffectMaterialUnderWindowBackground;
+                    blurView.blendingMode = NSVisualEffectBlendingModeBehindWindow;
+                    blurView.state = NSVisualEffectStateFollowsWindowActiveState;
+
+#if 1
+                    const NSView *const parent = [view superview];
+                    [parent addSubview:blurView positioned:NSWindowBelow relativeTo:view];
+#endif
+
+                    blurEffect = blurView;
+                    updateBlurEffectSize();
+                }
+
+                auto view = static_cast<const NSVisualEffectView *>(blurEffect);
+                if (option == BlurMode::Dark) {
+                    view.appearance = [NSAppearance appearanceNamed:@"NSAppearanceNameVibrantDark"];
+                } else {
+                    view.appearance =
+                        [NSAppearance appearanceNamed:@"NSAppearanceNameVibrantLight"];
+                }
             }
         }
 
-        ~NSWindowProxy() {
-            instances.remove(nswindow);
-            if (instances.count() <= 0) {
-                restoreImplementations();
-                windowClass = nil;
-            }
-            nswindow = nil;
-        }
-
-        void replaceImplementations() {
-            Method method = class_getInstanceMethod(windowClass, @selector(setStyleMask:));
-            oldSetStyleMask = reinterpret_cast<setStyleMaskPtr>(
-                method_setImplementation(method, reinterpret_cast<IMP>(setStyleMask)));
-
-            method =
-                class_getInstanceMethod(windowClass, @selector(setTitlebarAppearsTransparent:));
-            oldSetTitlebarAppearsTransparent =
-                reinterpret_cast<setTitlebarAppearsTransparentPtr>(method_setImplementation(
-                    method, reinterpret_cast<IMP>(setTitlebarAppearsTransparent)));
-
-#if 0
-            method = class_getInstanceMethod(windowClass, @selector(canBecomeKeyWindow));
-            oldCanBecomeKeyWindow = reinterpret_cast<canBecomeKeyWindowPtr>(method_setImplementation(method, reinterpret_cast<IMP>(canBecomeKeyWindow)));
-
-            method = class_getInstanceMethod(windowClass, @selector(canBecomeMainWindow));
-            oldCanBecomeMainWindow = reinterpret_cast<canBecomeMainWindowPtr>(method_setImplementation(method, reinterpret_cast<IMP>(canBecomeMainWindow)));
-#endif
-
-            method = class_getInstanceMethod(windowClass, @selector(sendEvent:));
-            oldSendEvent = reinterpret_cast<sendEventPtr>(
-                method_setImplementation(method, reinterpret_cast<IMP>(sendEvent)));
-        }
-
-        void restoreImplementations() {
-            Method method = class_getInstanceMethod(windowClass, @selector(setStyleMask:));
-            method_setImplementation(method, reinterpret_cast<IMP>(oldSetStyleMask));
-            oldSetStyleMask = nil;
-
-            method =
-                class_getInstanceMethod(windowClass, @selector(setTitlebarAppearsTransparent:));
-            method_setImplementation(method,
-                                     reinterpret_cast<IMP>(oldSetTitlebarAppearsTransparent));
-            oldSetTitlebarAppearsTransparent = nil;
-
-#if 0
-            method = class_getInstanceMethod(windowClass, @selector(canBecomeKeyWindow));
-            method_setImplementation(method, reinterpret_cast<IMP>(oldCanBecomeKeyWindow));
-            oldCanBecomeKeyWindow = nil;
-
-            method = class_getInstanceMethod(windowClass, @selector(canBecomeMainWindow));
-            method_setImplementation(method, reinterpret_cast<IMP>(oldCanBecomeMainWindow));
-            oldCanBecomeMainWindow = nil;
-#endif
-
-            method = class_getInstanceMethod(windowClass, @selector(sendEvent:));
-            method_setImplementation(method, reinterpret_cast<IMP>(oldSendEvent));
-            oldSendEvent = nil;
+        void updateBlurEffectSize() {
+            const NSView *const view = [nswindow contentView];
+            blurEffect.frame = view.frame;
         }
 
         void setSystemTitleBarVisible(const bool visible) {
@@ -84,6 +284,7 @@
             if (!nsview) {
                 return;
             }
+
             nsview.wantsLayer = YES;
             nswindow.styleMask |= NSWindowStyleMaskResizable;
             if (visible) {
@@ -107,9 +308,70 @@
 #endif
         }
 
-    private:
+        static void replaceImplementations() {
+            Method method = class_getInstanceMethod(windowClass, @selector(setStyleMask:));
+            oldSetStyleMask = reinterpret_cast<setStyleMaskPtr>(
+                method_setImplementation(method, reinterpret_cast<IMP>(setStyleMask)));
+
+            method =
+                class_getInstanceMethod(windowClass, @selector(setTitlebarAppearsTransparent:));
+            oldSetTitlebarAppearsTransparent =
+                reinterpret_cast<setTitlebarAppearsTransparentPtr>(method_setImplementation(
+                    method, reinterpret_cast<IMP>(setTitlebarAppearsTransparent)));
+
+#if 0
+            method = class_getInstanceMethod(windowClass, @selector(canBecomeKeyWindow));
+            oldCanBecomeKeyWindow = reinterpret_cast<canBecomeKeyWindowPtr>(method_setImplementation(method, reinterpret_cast<IMP>(canBecomeKeyWindow)));
+
+            method = class_getInstanceMethod(windowClass, @selector(canBecomeMainWindow));
+            oldCanBecomeMainWindow = reinterpret_cast<canBecomeMainWindowPtr>(method_setImplementation(method, reinterpret_cast<IMP>(canBecomeMainWindow)));
+#endif
+
+            method = class_getInstanceMethod(windowClass, @selector(sendEvent:));
+            oldSendEvent = reinterpret_cast<sendEventPtr>(
+                method_setImplementation(method, reinterpret_cast<IMP>(sendEvent)));
+
+            // Alloc
+            windowObserver = [[QWK_NSWindowObserver alloc] init];
+        }
+
+        static void restoreImplementations() {
+            Method method = class_getInstanceMethod(windowClass, @selector(setStyleMask:));
+            method_setImplementation(method, reinterpret_cast<IMP>(oldSetStyleMask));
+            oldSetStyleMask = nil;
+
+            method =
+                class_getInstanceMethod(windowClass, @selector(setTitlebarAppearsTransparent:));
+            method_setImplementation(method,
+                                     reinterpret_cast<IMP>(oldSetTitlebarAppearsTransparent));
+            oldSetTitlebarAppearsTransparent = nil;
+
+#if 0
+            method = class_getInstanceMethod(windowClass, @selector(canBecomeKeyWindow));
+            method_setImplementation(method, reinterpret_cast<IMP>(oldCanBecomeKeyWindow));
+            oldCanBecomeKeyWindow = nil;
+
+            method = class_getInstanceMethod(windowClass, @selector(canBecomeMainWindow));
+            method_setImplementation(method, reinterpret_cast<IMP>(oldCanBecomeMainWindow));
+            oldCanBecomeMainWindow = nil;
+#endif
+
+            method = class_getInstanceMethod(windowClass, @selector(sendEvent:));
+            method_setImplementation(method, reinterpret_cast<IMP>(oldSendEvent));
+            oldSendEvent = nil;
+
+            // Delete
+            [windowObserver release];
+            windowObserver = nil;
+        }
+
+        static inline const Class windowClass = [NSWindow class];
+
+        static inline const Class visualEffectViewClass = NSClassFromString(@"NSVisualEffectView");
+
+    protected:
         static BOOL canBecomeKeyWindow(id obj, SEL sel) {
-            if (instances.contains(reinterpret_cast<NSWindow *>(obj))) {
+            if (g_proxyIndexes->contains(reinterpret_cast<NSWindow *>(obj))) {
                 return YES;
             }
 
@@ -121,7 +383,7 @@
         }
 
         static BOOL canBecomeMainWindow(id obj, SEL sel) {
-            if (instances.contains(reinterpret_cast<NSWindow *>(obj))) {
+            if (g_proxyIndexes->contains(reinterpret_cast<NSWindow *>(obj))) {
                 return YES;
             }
 
@@ -133,7 +395,7 @@
         }
 
         static void setStyleMask(id obj, SEL sel, NSWindowStyleMask styleMask) {
-            if (instances.contains(reinterpret_cast<NSWindow *>(obj))) {
+            if (g_proxyIndexes->contains(reinterpret_cast<NSWindow *>(obj))) {
                 styleMask |= NSWindowStyleMaskFullSizeContentView;
             }
 
@@ -143,7 +405,7 @@
         }
 
         static void setTitlebarAppearsTransparent(id obj, SEL sel, BOOL transparent) {
-            if (instances.contains(reinterpret_cast<NSWindow *>(obj))) {
+            if (g_proxyIndexes->contains(reinterpret_cast<NSWindow *>(obj))) {
                 transparent = YES;
             }
 
@@ -177,11 +439,14 @@
         Q_DISABLE_COPY(NSWindowProxy)
 
         NSWindow *nswindow = nil;
+        NSView *blurEffect = nil;
+
+        bool systemButtonVisible = true;
+        QRect systemButtonRect;
+
+        static inline QWK_NSWindowObserver *windowObserver = nil;
+
         // NSEvent *lastMouseDownEvent = nil;
-
-        static inline QHash<NSWindow *, NSWindowProxy *> instances = {};
-
-        static inline Class windowClass = nil;
 
         using setStyleMaskPtr = void (*)(id, SEL, NSWindowStyleMask);
         static inline setStyleMaskPtr oldSetStyleMask = nil;
@@ -199,41 +464,41 @@
         static inline sendEventPtr oldSendEvent = nil;
     };
 
-    using ProxyList = QHash<WId, NSWindowProxy *>;
-    Q_GLOBAL_STATIC(ProxyList, g_proxyList);
-
     static inline NSWindow *mac_getNSWindow(const WId windowId) {
         const auto nsview = reinterpret_cast<NSView *>(windowId);
         return [nsview window];
     }
 
-    static inline void cleanupProxy() {
-        if (g_proxyList()->isEmpty()) {
-            return;
-        }
-        const auto &data = *g_proxyList();
-        qDeleteAll(data);
-        g_proxyList()->clear();
-    }
-
     static inline NSWindowProxy *ensureWindowProxy(const WId windowId) {
-        auto it = g_proxyList()->find(windowId);
-        if (it == g_proxyList()->end()) {
+        if (g_proxyList->isEmpty()) {
+            NSWindowProxy::replaceImplementations();
+        }
+
+        auto it = g_proxyList->find(windowId);
+        if (it == g_proxyList->end()) {
             NSWindow *nswindow = mac_getNSWindow(windowId);
             const auto proxy = new NSWindowProxy(nswindow);
-            it = g_proxyList()->insert(windowId, proxy);
-        }
-        static bool cleanerInstalled = false;
-        if (!cleanerInstalled) {
-            cleanerInstalled = true;
-            qAddPostRoutine(cleanupProxy);
+            it = g_proxyList->insert(windowId, proxy);
         }
         return it.value();
     }
 
-    class CocoaWindowEventFilter : public QObject {
+    static inline void releaseWindowProxy(const WId windowId) {
+        if (auto proxy = g_proxyList->take(windowId)) {
+            proxy->setSystemTitleBarVisible(true);
+            delete proxy;
+        } else {
+            return;
+        }
+
+        if (g_proxyList->isEmpty()) {
+            NSWindowProxy::restoreImplementations();
+        }
+    }
+
+    class CocoaWindowEventFilter : public SharedEventFilter {
     public:
-        explicit CocoaWindowEventFilter(AbstractWindowContext *context, QObject *parent = nullptr);
+        explicit CocoaWindowEventFilter(AbstractWindowContext *context);
         ~CocoaWindowEventFilter() override;
 
         enum WindowStatus {
@@ -244,7 +509,7 @@
         };
 
     protected:
-        bool eventFilter(QObject *object, QEvent *event) override;
+        bool sharedEventFilter(QObject *object, QEvent *event) override;
 
     private:
         AbstractWindowContext *m_context;
@@ -252,30 +517,28 @@
         WindowStatus m_windowStatus;
     };
 
-    CocoaWindowEventFilter::CocoaWindowEventFilter(AbstractWindowContext *context, QObject *parent)
-        : QObject(parent), m_context(context), m_cursorShapeChanged(false), m_windowStatus(Idle) {
-        m_context->window()->installEventFilter(this);
+    CocoaWindowEventFilter::CocoaWindowEventFilter(AbstractWindowContext *context)
+        : m_context(context), m_cursorShapeChanged(false), m_windowStatus(Idle) {
+        m_context->installSharedEventFilter(this);
     }
 
     CocoaWindowEventFilter::~CocoaWindowEventFilter() = default;
 
-    bool CocoaWindowEventFilter::eventFilter(QObject *obj, QEvent *event) {
+    bool CocoaWindowEventFilter::sharedEventFilter(QObject *obj, QEvent *event) {
         Q_UNUSED(obj)
+
         auto type = event->type();
         if (type < QEvent::MouseButtonPress || type > QEvent::MouseMove) {
             return false;
         }
-        QObject *host = m_context->host();
-        QWindow *window = m_context->window();
-        WindowItemDelegate *delegate = m_context->delegate();
+        auto host = m_context->host();
+        auto window = m_context->window();
+        auto delegate = m_context->delegate();
         auto me = static_cast<const QMouseEvent *>(event);
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-        QPoint scenePos = me->scenePosition().toPoint();
-        QPoint globalPos = me->globalPosition().toPoint();
-#else
-        QPoint scenePos = me->windowPos().toPoint();
-        QPoint globalPos = me->screenPos().toPoint();
-#endif
+
+        QPoint scenePos = getMouseEventScenePos(me);
+        QPoint globalPos = getMouseEventGlobalPos(me);
+
         bool inTitleBar = m_context->isInTitleBarDraggableArea(scenePos);
         switch (type) {
             case QEvent::MouseButtonPress: {
@@ -289,7 +552,6 @@
                             event->accept();
                             return true;
                         }
-                        m_windowStatus = WaitingRelease;
                         break;
                     }
                     case Qt::RightButton: {
@@ -299,6 +561,7 @@
                     default:
                         break;
                 }
+                m_windowStatus = WaitingRelease;
                 break;
             }
 
@@ -332,7 +595,7 @@
                     }
                     case PreparingMove: {
                         m_windowStatus = Moving;
-                        window->startSystemMove();
+                        startSystemMove(window);
                         event->accept();
                         return true;
                     }
@@ -366,10 +629,11 @@
     }
 
     CocoaWindowContext::CocoaWindowContext() : AbstractWindowContext() {
+        cocoaWindowEventFilter = std::make_unique<CocoaWindowEventFilter>(this);
     }
 
     CocoaWindowContext::~CocoaWindowContext() {
-        // TODO: deref something?
+        releaseWindowProxy(windowId);
     }
 
     QString CocoaWindowContext::key() const {
@@ -378,23 +642,77 @@
 
     void CocoaWindowContext::virtual_hook(int id, void *data) {
         switch (id) {
-            case ShowSystemMenuHook:
-                // TODO: mac system menu
+            case SystemButtonAreaChangedHook: {
+                ensureWindowProxy(windowId)->setSystemButtonRect(m_systemButtonArea);
                 return;
-            case SystemButtonAreaChangedHook:
-                // TODO: mac system button rect updated
-                return;
+            }
+
             default:
                 break;
         }
         AbstractWindowContext::virtual_hook(id, data);
     }
 
-    void CocoaWindowContext::winIdChanged(QWindow *oldWindow, bool destroyed) {
+    void CocoaWindowContext::winIdChanged() {
+        // If the original window id is valid, remove all resources related
+        if (windowId) {
+            releaseWindowProxy(windowId);
+            windowId = 0;
+        }
+
+        if (!m_windowHandle) {
+            return;
+        }
+
+        // Allocate new resources
         windowId = m_windowHandle->winId();
         ensureWindowProxy(windowId)->setSystemTitleBarVisible(false);
-        cocoaWindowEventFilter = std::make_unique<CocoaWindowEventFilter>(this, this);
-        return true;
+    }
+
+    bool CocoaWindowContext::windowAttributeChanged(const QString &key, const QVariant &attribute,
+                                                    const QVariant &oldAttribute) {
+        Q_UNUSED(oldAttribute)
+
+        if (key == QStringLiteral("no-system-buttons")) {
+            if (attribute.type() != QVariant::Bool)
+                return false;
+            ensureWindowProxy(windowId)->setSystemButtonVisible(!attribute.toBool());
+            return true;
+        }
+
+        if (key == QStringLiteral("blur-effect")) {
+            // Class not available
+            if (!NSWindowProxy::visualEffectViewClass) {
+                return false;
+            }
+
+            auto option = NSWindowProxy::BlurMode::None;
+            if (attribute.type() == QVariant::Bool) {
+                if (attribute.toBool()) {
+                    NSString *osxMode =
+                        [[NSUserDefaults standardUserDefaults] stringForKey:@"AppleInterfaceStyle"];
+                    option = [osxMode isEqualToString:@"Dark"] ? NSWindowProxy::BlurMode::Dark
+                                                               : NSWindowProxy::BlurMode::Light;
+                }
+            } else if (attribute.type() == QVariant::String) {
+                auto value = attribute.toString();
+                if (value == QStringLiteral("dark")) {
+                    option = NSWindowProxy::BlurMode::Dark;
+                } else if (value == QStringLiteral("light")) {
+                    option = NSWindowProxy::BlurMode::Light;
+                } else if (value == QStringLiteral("none")) {
+                    // ...
+                } else {
+                    return false;
+                }
+            } else {
+                return false;
+            }
+            ensureWindowProxy(windowId)->setBlurEffect(option);
+            return true;
+        }
+
+        return false;
     }
 
 }

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