From 52a662ed17db6c3a3ff2050d61bc2e06ea21b056 Mon Sep 17 00:00:00 2001
From: Sine Striker <trueful@163.com>
Date: 周日, 17 12月 2023 01:07:13 +0800
Subject: [PATCH] Add Mac system button area interfaces

---
 src/widgets/widgetwindowagent_mac.cpp       |   53 ++++++++++++++++++++++++++
 src/core/contexts/abstractwindowcontext.cpp |    7 +++
 src/core/contexts/cocoawindowcontext.mm     |   13 ++++++
 src/widgets/CMakeLists.txt                  |    2 +
 src/core/contexts/abstractwindowcontext_p.h |   17 ++++++++
 src/widgets/widgetwindowagent.h             |    5 ++
 src/widgets/widgetwindowagent_p.h           |    4 ++
 7 files changed, 99 insertions(+), 2 deletions(-)

diff --git a/src/core/contexts/abstractwindowcontext.cpp b/src/core/contexts/abstractwindowcontext.cpp
index 96f2935..7c40c89 100644
--- a/src/core/contexts/abstractwindowcontext.cpp
+++ b/src/core/contexts/abstractwindowcontext.cpp
@@ -76,6 +76,13 @@
         return true;
     }
 
+#ifdef Q_OS_MAC
+    void AbstractWindowContext::setSystemButtonArea(const QRect &rect) {
+        m_systemButtonArea = rect;
+        virtual_hook(SystemButtonAreaChangedHook, nullptr);
+    }
+#endif
+
     bool AbstractWindowContext::isInSystemButtons(const QPoint &pos,
                                                   WindowAgentBase::SystemButton *button) const {
         *button = WindowAgentBase::Unknown;
diff --git a/src/core/contexts/abstractwindowcontext_p.h b/src/core/contexts/abstractwindowcontext_p.h
index be5ab36..a86ddd8 100644
--- a/src/core/contexts/abstractwindowcontext_p.h
+++ b/src/core/contexts/abstractwindowcontext_p.h
@@ -36,6 +36,11 @@
         inline QObject *titleBar() const;
         bool setTitleBar(QObject *obj);
 
+#ifdef Q_OS_MAC
+        inline QRect systemButtonArea() const;
+        void setSystemButtonArea(const QRect &rect);
+#endif
+
         bool isInSystemButtons(const QPoint &pos, WindowAgentBase::SystemButton *button) const;
         bool isInTitleBarDraggableArea(const QPoint &pos) const;
 
@@ -45,7 +50,8 @@
             CentralizeHook = 1,
             ShowSystemMenuHook,
             DefaultColorsHook,
-            DrawWindows10BorderHook, // Only works on Windows 10
+            DrawWindows10BorderHook,     // Only works on Windows 10
+            SystemButtonAreaChangedHook, // Only works on Mac
         };
         virtual void virtual_hook(int id, void *data);
 
@@ -60,6 +66,9 @@
         QWindow *m_windowHandle{};
 
         QSet<const QObject *> m_hitTestVisibleItems;
+#ifdef Q_OS_MAC
+        QRect m_systemButtonArea;
+#endif
 
         QObject *m_titleBar{};
         std::array<QObject *, WindowAgentBase::NumSystemButton> m_systemButtons{};
@@ -90,6 +99,12 @@
         return m_titleBar;
     }
 
+#ifdef Q_OS_MAC
+    inline QRect AbstractWindowContext::systemButtonArea() const {
+        return m_systemButtonArea;
+    }
+#endif
+
 }
 
 #endif // ABSTRACTWINDOWCONTEXT_P_H
diff --git a/src/core/contexts/cocoawindowcontext.mm b/src/core/contexts/cocoawindowcontext.mm
index f8a45d5..67ca980 100644
--- a/src/core/contexts/cocoawindowcontext.mm
+++ b/src/core/contexts/cocoawindowcontext.mm
@@ -105,7 +105,7 @@
             nswindow.showsToolbarButton = NO;
             nswindow.movableByWindowBackground = NO;
             nswindow.movable = NO; // This line causes the window in the wrong position when
-            // become fullscreen.
+                                   // become fullscreen.
             //  For some unknown reason, we don't need the following hack in Qt versions below or
             //  equal to 6.2.4.
 #if (QT_VERSION > QT_VERSION_CHECK(6, 2, 4))
@@ -384,6 +384,17 @@
     }
 
     void CocoaWindowContext::virtual_hook(int id, void *data) {
+        switch (id) {
+            case ShowSystemMenuHook:
+                // TODO: mac system menu
+                return;
+            case SystemButtonAreaChangedHook:
+                // TODO: mac system button rect updated
+                return;
+            default:
+                break;
+        }
+        AbstractWindowContext::virtual_hook(id, data);
     }
 
     bool CocoaWindowContext::setupHost() {
diff --git a/src/widgets/CMakeLists.txt b/src/widgets/CMakeLists.txt
index 5cdb2c2..3b8db9a 100644
--- a/src/widgets/CMakeLists.txt
+++ b/src/widgets/CMakeLists.txt
@@ -14,6 +14,8 @@
 
 if(WIN32)
     list(APPEND _src widgetwindowagent_win.cpp)
+elseif(APPLE)
+    list(APPEND _src widgetwindowagent_mac.cpp)
 endif()
 
 qwk_add_library(${PROJECT_NAME} AUTOGEN
diff --git a/src/widgets/widgetwindowagent.h b/src/widgets/widgetwindowagent.h
index 20347a9..ea20025 100644
--- a/src/widgets/widgetwindowagent.h
+++ b/src/widgets/widgetwindowagent.h
@@ -26,6 +26,11 @@
         QWidget *systemButton(SystemButton button) const;
         void setSystemButton(SystemButton button, QWidget *w);
 
+#ifdef Q_OS_MAC
+        QWidget *systemButtonArea() const;
+        void setSystemButtonArea(QWidget *widget);
+#endif
+
         bool isHitTestVisible(const QWidget *w) const;
         void setHitTestVisible(const QWidget *w, bool visible = true);
 
diff --git a/src/widgets/widgetwindowagent_mac.cpp b/src/widgets/widgetwindowagent_mac.cpp
new file mode 100644
index 0000000..d09f7b3
--- /dev/null
+++ b/src/widgets/widgetwindowagent_mac.cpp
@@ -0,0 +1,53 @@
+#include "widgetwindowagent_p.h"
+
+#include <QtGui/QtEvents>
+
+namespace QWK {
+
+    class SystemButtonAreaWidgetEventFilter : public QObject {
+    public:
+        SystemButtonAreaWidgetEventFilter(QWidget *widget, AbstractWindowContext *ctx,
+                                          QObject *parent = nullptr)
+            : QObject(parent), widget(widget), ctx(ctx) {
+            widget->installEventFilter(this);
+        }
+        ~SystemButtonAreaWidgetEventFilter() = default;
+
+    protected:
+        bool eventFilter(QObject *obj, QEvent *event) override {
+            switch (event->type()) {
+                case QEvent::Move:
+                case QEvent::Resize: {
+                    ctx->setSystemButtonArea(widget->geometry());
+                    break;
+                }
+
+                default:
+                    break;
+            }
+            return QObject::eventFilter(obj, event);
+        }
+
+    protected:
+        QWidget *widget;
+        AbstractWindowContext *ctx;
+    };
+
+    QWidget *WidgetWindowAgent::systemButtonArea() const {
+        Q_D(const WidgetWindowAgent);
+        return d->systemButtonAreaWidget;
+    }
+
+    void WidgetWindowAgent::setSystemButtonArea(QWidget *widget) {
+        Q_D(WidgetWindowAgent);
+        d->systemButtonAreaWidget = widget;
+        if (!widget) {
+            systemButtonAreaWidgetEventFilter.reset();
+            d->context->setSystemButtonArea({});
+            return;
+        }
+        systemButtonAreaWidgetEventFilter =
+            std::make_unique<SystemButtonAreaWidgetEventFilter>(widget, d->context);
+    }
+
+}
\ No newline at end of file
diff --git a/src/widgets/widgetwindowagent_p.h b/src/widgets/widgetwindowagent_p.h
index 8fee638..cb6d216 100644
--- a/src/widgets/widgetwindowagent_p.h
+++ b/src/widgets/widgetwindowagent_p.h
@@ -16,6 +16,10 @@
 
         // Host
         QWidget *hostWidget{};
+#ifdef Q_OS_MAC
+        QWidget *systemButtonAreaWidget{};
+        std::unique_ptr<QObject> systemButtonAreaWidgetEventFilter;
+#endif
 
 #ifdef Q_OS_WINDOWS
         void setupWindows10BorderWorkaround();

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