From 2266702a0b2fa327e7b371470cb68934f13ddc1e Mon Sep 17 00:00:00 2001
From: Cyril Anisimov <CyAn84@gmail.com>
Date: Wed, 18 Dec 2024 23:45:43 +0100
Subject: [PATCH] add `focusControl` with utility functions for focus control

---
 client/CMakeLists.txt         |   2 +
 client/utils/focusControl.cpp | 131 ++++++++++++++++++++++++++++++++++
 client/utils/focusControl.h   |  30 ++++++++
 3 files changed, 163 insertions(+)
 create mode 100644 client/utils/focusControl.cpp
 create mode 100644 client/utils/focusControl.h

diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt
index 05f9f17c..beebc3ee 100644
--- a/client/CMakeLists.txt
+++ b/client/CMakeLists.txt
@@ -146,6 +146,7 @@ set(HEADERS ${HEADERS}
     ${CMAKE_CURRENT_LIST_DIR}/core/serialization/transfer.h
     ${CMAKE_CURRENT_LIST_DIR}/core/enums/apiEnums.h
     ${CMAKE_CURRENT_LIST_DIR}/../common/logger/logger.h
+    ${CMAKE_CURRENT_LIST_DIR}/utils/focusControl.h
 )
 
 # Mozilla headres
@@ -197,6 +198,7 @@ set(SOURCES ${SOURCES}
     ${CMAKE_CURRENT_LIST_DIR}/core/serialization/vmess.cpp
     ${CMAKE_CURRENT_LIST_DIR}/core/serialization/vmess_new.cpp
     ${CMAKE_CURRENT_LIST_DIR}/../common/logger/logger.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/utils/focusControl.cpp
 )
 
 # Mozilla sources
diff --git a/client/utils/focusControl.cpp b/client/utils/focusControl.cpp
new file mode 100644
index 00000000..a3107d55
--- /dev/null
+++ b/client/utils/focusControl.cpp
@@ -0,0 +1,131 @@
+#include "focusControl.h"
+#include "utils/focusControl.h"
+
+#include <QPointF>
+#include <QQuickItem>
+#include <QQuickWindow>
+
+namespace focusControl
+{
+    QPointF getItemCenterPointOnScene(QQuickItem *item)
+    {
+        const auto x0 = item->x() + (item->width() / 2);
+        const auto y0 = item->y() + (item->height() / 2);
+        return item->parentItem()->mapToScene(QPointF { x0, y0 });
+    }
+
+    bool isEnabled(QObject *obj)
+    {
+        const auto item = qobject_cast<QQuickItem *>(obj);
+        return item && item->isEnabled();
+    }
+
+    bool isVisible(QObject *item)
+    {
+        const auto res = item->property("visible").toBool();
+        return res;
+    }
+
+    bool isFocusable(QObject *item)
+    {
+        const auto res = item->property("isFocusable").toBool();
+        return res;
+    }
+
+    bool isListView(QObject *item)
+    {
+        return item->inherits("QQuickListView");
+    }
+
+    bool isOnTheScene(QObject *object)
+    {
+        QQuickItem *item = qobject_cast<QQuickItem *>(object);
+        if (!item) {
+            qWarning() << "Couldn't recognize object as item";
+            return false;
+        }
+
+        if (!item->isVisible()) {
+            return false;
+        }
+
+        QRectF itemRect = item->mapRectToScene(item->childrenRect());
+
+        QQuickWindow *window = item->window();
+        if (!window) {
+            qWarning() << "Couldn't get the window on the Scene check";
+            return false;
+        }
+
+        const auto contentItem = window->contentItem();
+        if (!contentItem) {
+            qWarning() << "Couldn't get the content item on the Scene check";
+            return false;
+        }
+        QRectF windowRect = contentItem->childrenRect();
+        const auto res = (windowRect.contains(itemRect) || isListView(item));
+        return res;
+    }
+
+    bool isMore(QObject *item1, QObject *item2)
+    {
+        return !isLess(item1, item2);
+    }
+
+    bool isLess(QObject *item1, QObject *item2)
+    {
+        const auto p1 = getItemCenterPointOnScene(qobject_cast<QQuickItem *>(item1));
+        const auto p2 = getItemCenterPointOnScene(qobject_cast<QQuickItem *>(item2));
+        return (p1.y() == p2.y()) ? (p1.x() < p2.x()) : (p1.y() < p2.y());
+    }
+
+    QList<QObject *> getSubChain(QObject *object)
+    {
+        QList<QObject *> res;
+        if (!object) {
+            qDebug() << "The object is NULL";
+            return res;
+        }
+
+        const auto children = object->children();
+
+        for (const auto child : children) {
+            if (child && isFocusable(child) && isOnTheScene(child) && isEnabled(child)) {
+                res.append(child);
+            } else {
+                res.append(getSubChain(child));
+            }
+        }
+        return res;
+    }
+
+    QList<QObject *> getItemsChain(QObject *object)
+    {
+        QList<QObject *> res;
+        if (!object) {
+            qDebug() << "The object is NULL";
+            return res;
+        }
+
+        const auto children = object->children();
+
+        for (const auto child : children) {
+            if (child && isFocusable(child) && isEnabled(child) && isVisible(child)) {
+                res.append(child);
+            } else {
+                res.append(getItemsChain(child));
+            }
+        }
+        return res;
+    }
+
+    void printItems(const QList<QObject *> &items, QObject *current_item)
+    {
+        for (const auto &item : items) {
+            QQuickItem *i = qobject_cast<QQuickItem *>(item);
+            QPointF coords { getItemCenterPointOnScene(i) };
+            QString prefix = current_item == i ? "==>" : "   ";
+            qDebug() << prefix << " Item: " << i << " with coords: " << coords;
+        }
+    }
+} // namespace focusControl
\ No newline at end of file
diff --git a/client/utils/focusControl.h b/client/utils/focusControl.h
new file mode 100644
index 00000000..96ab3a83
--- /dev/null
+++ b/client/utils/focusControl.h
@@ -0,0 +1,30 @@
+#ifndef FOCUSCONTROL_H
+#define FOCUSCONTROL_H
+
+#include <QList>
+#include <QObject>
+
+namespace focusControl
+{
+    bool isEnabled(QObject *item);
+    bool isVisible(QObject *item);
+    bool isFocusable(QObject *item);
+    bool isListView(QObject *item);
+    bool isOnTheScene(QObject *object);
+    bool isMore(QObject *item1, QObject *item2);
+    bool isLess(QObject *item1, QObject *item2);
+
+    /*!
+     * \brief Make focus chain of elements which are on the scene
+     */
+    QList<QObject *> getSubChain(QObject *object);
+
+    /*!
+     * \brief Make focus chain of elements which could be not on the scene
+     */
+    QList<QObject *> getItemsChain(QObject *object);
+
+    void printItems(const QList<QObject *> &items, QObject *current_item);
+}
+
+#endif // FOCUSCONTROL_H
\ No newline at end of file