From f44042bff145a0c5dcea04852ca5a8424477cf50 Mon Sep 17 00:00:00 2001
From: SineStriker <55847490+SineStriker@users.noreply.github.com>
Date: 周日, 28 7月 2024 18:10:09 +0800
Subject: [PATCH] Merge pull request #124 from stdware/dev

---
 src/core/contexts/abstractwindowcontext.cpp |  221 ++++++++++++++++++++++++++++++++++++-------------------
 1 files changed, 145 insertions(+), 76 deletions(-)

diff --git a/src/core/contexts/abstractwindowcontext.cpp b/src/core/contexts/abstractwindowcontext.cpp
index d2da16f..f838064 100644
--- a/src/core/contexts/abstractwindowcontext.cpp
+++ b/src/core/contexts/abstractwindowcontext.cpp
@@ -1,34 +1,16 @@
+// Copyright (C) 2023-2024 Stdware Collections (https://www.github.com/stdware)
+// Copyright (C) 2021-2023 wangwenx190 (Yuhang Zhao)
+// SPDX-License-Identifier: Apache-2.0
+
 #include "abstractwindowcontext_p.h"
 
 #include <QtGui/QPen>
 #include <QtGui/QPainter>
 #include <QtGui/QScreen>
-#include <memory>
 
 #include "qwkglobal_p.h"
 
 namespace QWK {
-
-    class WinIdChangeEventFilter : public QObject {
-    public:
-        explicit WinIdChangeEventFilter(QObject *widget, AbstractWindowContext *ctx,
-                                        QObject *parent = nullptr)
-            : QObject(parent), ctx(ctx) {
-            widget->installEventFilter(this);
-        }
-
-    protected:
-        bool eventFilter(QObject *obj, QEvent *event) override {
-            Q_UNUSED(obj)
-            if (event->type() == QEvent::WinIdChange) {
-                ctx->notifyWinIdChange();
-            }
-            return false;
-        }
-
-    protected:
-        AbstractWindowContext *ctx;
-    };
 
     AbstractWindowContext::AbstractWindowContext() = default;
 
@@ -40,51 +22,31 @@
         }
         m_host = host;
         m_delegate.reset(delegate);
-        m_winIdChangeEventFilter = std::make_unique<WinIdChangeEventFilter>(host, this);
-
-        m_windowHandle = m_delegate->hostWindow(m_host);
-        if (m_windowHandle) {
-            winIdChanged();
-        }
+        m_winIdChangeEventFilter.reset(delegate->createWinIdEventFilter(host, this));
+        notifyWinIdChange();
     }
 
-    bool AbstractWindowContext::setWindowAttribute(const QString &key, const QVariant &attribute) {
-        auto it = m_windowAttributes.find(key);
-        if (it == m_windowAttributes.end()) {
-            if (!attribute.isValid()) {
-                return true;
-            }
-            if (m_windowHandle && !windowAttributeChanged(key, attribute, {})) {
-                return false;
-            }
-            m_windowAttributes.insert(key, attribute);
-            return true;
-        }
-
-        if (it.value() == attribute)
-            return true;
-        if (m_windowHandle && !windowAttributeChanged(key, attribute, it.value())) {
-            return false;
-        }
-
-        if (attribute.isValid()) {
-            it.value() = attribute;
-        } else {
-            m_windowAttributes.erase(it);
-        }
-        return true;
-    }
-
-    bool AbstractWindowContext::setHitTestVisible(const QObject *obj, bool visible) {
+    bool AbstractWindowContext::setHitTestVisible(QObject *obj, bool visible) {
         Q_ASSERT(obj);
         if (!obj) {
             return false;
         }
 
+        auto it = m_hitTestVisibleItems.find(obj);
         if (visible) {
+            if (it != m_hitTestVisibleItems.end()) {
+                return true;
+            }
+            connect(obj, &QObject::destroyed, this,
+                    &AbstractWindowContext::_q_hitTestVisibleItemDestroyed);
             m_hitTestVisibleItems.insert(obj);
         } else {
-            m_hitTestVisibleItems.remove(obj);
+            if (it == m_hitTestVisibleItems.end()) {
+                return false;
+            }
+            disconnect(obj, &QObject::destroyed, this,
+                       &AbstractWindowContext::_q_hitTestVisibleItemDestroyed);
+            m_hitTestVisibleItems.erase(it);
         }
         return true;
     }
@@ -96,8 +58,18 @@
             return false;
         }
 
-        if (m_systemButtons[button] == obj) {
-            return false;
+        auto org = m_systemButtons[button];
+        if (org == obj) {
+            return true;
+        }
+
+        if (org) {
+            disconnect(org, &QObject::destroyed, this,
+                       &AbstractWindowContext::_q_systemButtonDestroyed);
+        }
+        if (obj) {
+            connect(obj, &QObject::destroyed, this,
+                    &AbstractWindowContext::_q_systemButtonDestroyed);
         }
         m_systemButtons[button] = obj;
         return true;
@@ -105,25 +77,27 @@
 
     bool AbstractWindowContext::setTitleBar(QObject *item) {
         Q_ASSERT(item);
-        if (m_titleBar == item) {
+        auto org = m_titleBar;
+        if (org == item) {
             return false;
         }
 
-        if (m_titleBar) {
+        if (org) {
             // Since the title bar is changed, all items inside it should be dereferenced right away
-            for (auto &button : m_systemButtons) {
-                button = nullptr;
-            }
-            m_hitTestVisibleItems.clear();
+            removeSystemButtonsAndHitTestItems();
+            disconnect(org, &QObject::destroyed, this,
+                       &AbstractWindowContext::_q_titleBarDistroyed);
         }
-
+        if (item) {
+            connect(item, &QObject::destroyed, this, &AbstractWindowContext::_q_titleBarDistroyed);
+        }
         m_titleBar = item;
         return true;
     }
 
 #ifdef Q_OS_MAC
-    void AbstractWindowContext::setSystemButtonArea(const QRect &rect) {
-        m_systemButtonArea = rect;
+    void AbstractWindowContext::setSystemButtonAreaCallback(const ScreenRectCallback &callback) {
+        m_systemButtonAreaCallback = callback;
         virtual_hook(SystemButtonAreaChangedHook, nullptr);
     }
 #endif
@@ -200,19 +174,24 @@
     void AbstractWindowContext::virtual_hook(int id, void *data) {
         switch (id) {
             case CentralizeHook: {
-                if (!m_windowHandle)
+                if (!m_windowId)
                     return;
 
+                QRect windowGeometry = m_delegate->getGeometry(m_host);
                 QRect screenGeometry = m_windowHandle->screen()->geometry();
-                int x = (screenGeometry.width() - m_windowHandle->width()) / 2;
-                int y = (screenGeometry.height() - m_windowHandle->height()) / 2;
+                int x = (screenGeometry.width() - windowGeometry.width()) / 2;
+                int y = (screenGeometry.height() - windowGeometry.height()) / 2;
                 QPoint pos(x, y);
                 pos += screenGeometry.topLeft();
-                m_windowHandle->setPosition(pos);
+                m_delegate->setGeometry(m_host, QRect(pos, windowGeometry.size()));
                 return;
             }
 
             case RaiseWindowHook: {
+                if (!m_windowId)
+                    return;
+
+                m_delegate->setWindowVisible(m_host, true);
                 Qt::WindowStates state = m_delegate->getWindowState(m_host);
                 if (state & Qt::WindowMinimized) {
                     m_delegate->setWindowState(m_host, state & ~Qt::WindowMinimized);
@@ -241,13 +220,25 @@
     }
 
     void AbstractWindowContext::notifyWinIdChange() {
-        auto oldWindow = m_windowHandle;
+        auto oldWinId = m_windowId;
+        m_windowId = m_winIdChangeEventFilter->winId();
+
+        // In Qt6, after QWidget::close() is called, the related QWindow's all surfaces and the
+        // platform window will be removed, and the WinId will be set to 0. After that, when the
+        // QWidget is shown again, the whole things will be recreated again.
+        // As a result, we must update our WindowContext each time the WinId changes.
+        if (m_windowHandle) {
+            removeEventFilter(m_windowHandle);
+        }
         m_windowHandle = m_delegate->hostWindow(m_host);
-        if (oldWindow == m_windowHandle)
-            return;
-        winIdChanged();
+
+        if (oldWinId != m_windowId) {
+            winIdChanged(m_windowId, oldWinId);
+        }
 
         if (m_windowHandle) {
+            m_windowHandle->installEventFilter(this);
+
             // Refresh window attributes
             auto attributes = m_windowAttributes;
             m_windowAttributes.clear();
@@ -258,6 +249,50 @@
                 m_windowAttributes.insert(it.key(), it.value());
             }
         }
+
+        // Send to shared dispatchers
+        if (oldWinId != m_windowId) {
+            QEvent e(QEvent::WinIdChange);
+            sharedDispatch(m_host, &e);
+        }
+    }
+
+    QVariant AbstractWindowContext::windowAttribute(const QString &key) const {
+        return m_windowAttributes.value(key);
+    }
+
+    bool AbstractWindowContext::setWindowAttribute(const QString &key, const QVariant &attribute) {
+        auto it = m_windowAttributes.find(key);
+        if (it == m_windowAttributes.end()) {
+            if (!attribute.isValid()) {
+                return true;
+            }
+            if (!m_windowHandle || !windowAttributeChanged(key, attribute, {})) {
+                return false;
+            }
+            m_windowAttributes.insert(key, attribute);
+            return true;
+        }
+
+        if (it.value() == attribute)
+            return true;
+        if (!m_windowHandle || !windowAttributeChanged(key, attribute, it.value())) {
+            return false;
+        }
+
+        if (attribute.isValid()) {
+            it.value() = attribute;
+        } else {
+            m_windowAttributes.erase(it);
+        }
+        return true;
+    }
+
+    bool AbstractWindowContext::eventFilter(QObject *obj, QEvent *event) {
+        if (obj == m_windowHandle && sharedDispatch(obj, event)) {
+            return true;
+        }
+        return QObject::eventFilter(obj, event);
     }
 
     bool AbstractWindowContext::windowAttributeChanged(const QString &key,
@@ -266,4 +301,38 @@
         return false;
     }
 
+    void AbstractWindowContext::removeSystemButtonsAndHitTestItems() {
+        for (auto &button : m_systemButtons) {
+            if (!button) {
+                continue;
+            }
+            disconnect(button, &QObject::destroyed, this,
+                       &AbstractWindowContext::_q_systemButtonDestroyed);
+            button = nullptr;
+        }
+        for (auto &item : m_hitTestVisibleItems) {
+            disconnect(item, &QObject::destroyed, this,
+                       &AbstractWindowContext::_q_hitTestVisibleItemDestroyed);
+        }
+        m_hitTestVisibleItems.clear();
+    }
+
+    void AbstractWindowContext::_q_titleBarDistroyed(QObject *obj) {
+        Q_UNUSED(obj)
+        removeSystemButtonsAndHitTestItems();
+        m_titleBar = nullptr;
+    }
+
+    void AbstractWindowContext::_q_hitTestVisibleItemDestroyed(QObject *obj) {
+        m_hitTestVisibleItems.remove(obj);
+    }
+
+    void AbstractWindowContext::_q_systemButtonDestroyed(QObject *obj) {
+        for (auto &item : m_systemButtons) {
+            if (item == obj) {
+                item = nullptr;
+            }
+        }
+    }
+
 }

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