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+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QAPPLEKEYMAPPER_H
+#define QAPPLEKEYMAPPER_H
+
+#ifdef Q_OS_MACOS
+#include <Carbon/Carbon.h>
+#endif
+
+#include <QtCore/QList>
+#include <QtGui/QKeyEvent>
+
+#include <QtCore/private/qcore_mac_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_GUI_EXPORT QAppleKeyMapper
+{
+public:
+    static Qt::KeyboardModifiers queryKeyboardModifiers();
+    QList<int> possibleKeys(const QKeyEvent *event) const;
+    static Qt::Key fromNSString(Qt::KeyboardModifiers qtMods, NSString *characters,
+                                NSString *charactersIgnoringModifiers);
+#ifdef Q_OS_MACOS
+    static Qt::KeyboardModifiers fromCocoaModifiers(NSEventModifierFlags cocoaModifiers);
+    static NSEventModifierFlags toCocoaModifiers(Qt::KeyboardModifiers);
+
+    static QChar toCocoaKey(Qt::Key key);
+    static Qt::Key fromCocoaKey(QChar keyCode);
+#else
+    static Qt::Key fromUIKitKey(NSString *keyCode);
+    static Qt::KeyboardModifiers fromUIKitModifiers(ulong uikitModifiers);
+    static ulong toUIKitModifiers(Qt::KeyboardModifiers);
+#endif
+private:
+#ifdef Q_OS_MACOS
+    static constexpr int kNumModifierCombinations = 16;
+    struct KeyMap : std::array<char32_t, kNumModifierCombinations>
+    {
+        // Initialize first element to a sentinel that allows us
+        // to distinguish an uninitialized map from an initialized.
+        // Using 0 would not allow us to map U+0000 (NUL), however
+        // unlikely that is.
+        KeyMap() : std::array<char32_t, 16>{Qt::Key_unknown} {}
+    };
+
+    bool updateKeyboard();
+
+    using VirtualKeyCode = unsigned short;
+    const KeyMap &keyMapForKey(VirtualKeyCode virtualKey, QChar unicodeKey) const;
+
+    QCFType<TISInputSourceRef> m_currentInputSource = nullptr;
+
+    enum { NullMode, UnicodeMode, OtherMode } m_keyboardMode = NullMode;
+    const UCKeyboardLayout *m_keyboardLayoutFormat = nullptr;
+    KeyboardLayoutKind m_keyboardKind = kKLKCHRuchrKind;
+    mutable UInt32 m_deadKeyState = 0; // Maintains dead key state beween calls to UCKeyTranslate
+
+    mutable QHash<VirtualKeyCode, KeyMap> m_keyMap;
+#endif
+};
+
+QT_END_NAMESPACE
+
+#endif
+