qkeysequence.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qkeysequence.h"
#include "qkeysequence_p.h"
#include <qpa/qplatformtheme.h>
#include "private/qguiapplication_p.h"
 
#include "qdebug.h"
#include <QtCore/qhashfunctions.h>
#ifndef QT_NO_DATASTREAM
# include "qdatastream.h"
#endif
#include "qvariant.h"
 
#if defined(Q_OS_APPLE)
#include <QtCore/private/qcore_mac_p.h>
#endif
 
#include <algorithm>
#include <q20algorithm.h>
 
QT_BEGIN_NAMESPACE
 
using namespace Qt::StringLiterals;
 
#if defined(Q_OS_APPLE) || defined(Q_QDOC)
Q_CONSTINIT static bool qt_sequence_no_mnemonics = true;
struct AppleSpecialKey {
    int key;
    ushort appleSymbol;
};
 
// Unicode code points for the glyphs associated with these keys
// Defined by Carbon headers but not anywhere in Cocoa
static constexpr int kShiftUnicode = 0x21E7;
static constexpr int kControlUnicode = 0x2303;
static constexpr int kOptionUnicode = 0x2325;
static constexpr int kCommandUnicode = 0x2318;
 
static constexpr AppleSpecialKey entries[] = {
    { Qt::Key_Escape, 0x238B },
    { Qt::Key_Tab, 0x21E5 },
    { Qt::Key_Backtab, 0x21E4 },
    { Qt::Key_Backspace, 0x232B },
    { Qt::Key_Return, 0x21B5 },
    { Qt::Key_Enter, 0x2324 },
    { Qt::Key_Delete, 0x2326 },
    { Qt::Key_Clear, 0x2327 },
    { Qt::Key_Home, 0x2196 },
    { Qt::Key_End, 0x2198 },
    { Qt::Key_Left, 0x2190 },
    { Qt::Key_Up, 0x2191 },
    { Qt::Key_Right, 0x2192 },
    { Qt::Key_Down, 0x2193 },
    { Qt::Key_PageUp, 0x21DE },
    { Qt::Key_PageDown, 0x21DF },
    { Qt::Key_Shift, kShiftUnicode },
    { Qt::Key_Control, kCommandUnicode },
    { Qt::Key_Meta, kControlUnicode },
    { Qt::Key_Alt, kOptionUnicode },
    { Qt::Key_CapsLock, 0x21EA },
    { Qt::Key_Eject, 0x23CF },
};
 
static constexpr bool operator<(const AppleSpecialKey &lhs, const AppleSpecialKey &rhs)
{
    return lhs.key < rhs.key;
}
 
static constexpr bool operator<(const AppleSpecialKey &lhs, int rhs)
{
    return lhs.key < rhs;
}
 
static constexpr bool operator<(int lhs, const AppleSpecialKey &rhs)
{
    return lhs < rhs.key;
}
 
static_assert(q20::is_sorted(std::begin(entries), std::end(entries)));
 
static QChar appleSymbolForQtKey(int key)
{
    const auto i = std::lower_bound(std::begin(entries), std::end(entries), key);
    if (i == std::end(entries) || key < *i)
        return QChar();
    ushort appleSymbol = i->appleSymbol;
    if (qApp->testAttribute(Qt::AA_MacDontSwapCtrlAndMeta)
            && (appleSymbol == kControlUnicode || appleSymbol == kCommandUnicode)) {
        if (appleSymbol == kControlUnicode)
            appleSymbol = kCommandUnicode;
        else
            appleSymbol = kControlUnicode;
    }
 
    return QChar(appleSymbol);
}
 
static int qtkeyForAppleSymbol(const QChar ch)
{
    const ushort unicode = ch.unicode();
    for (const AppleSpecialKey &entry : entries) {
        if (entry.appleSymbol == unicode) {
            int key = entry.key;
            if (qApp->testAttribute(Qt::AA_MacDontSwapCtrlAndMeta)
                    && (unicode == kControlUnicode || unicode == kCommandUnicode)) {
                if (unicode == kControlUnicode)
                    key = Qt::Key_Control;
                else
                    key = Qt::Key_Meta;
            }
            return key;
        }
    }
    return -1;
}
 
#else
Q_CONSTINIT static bool qt_sequence_no_mnemonics = false;
#endif
 
void Q_GUI_EXPORT qt_set_sequence_auto_mnemonic(bool b) { qt_sequence_no_mnemonics = !b; }
 
static constexpr struct {
    int key;
    const char name[25];
} keyname[] = {
    //: This and all following "incomprehensible" strings in QShortcut context
    //: are key names. Please use the localized names appearing on actual
    //: keyboards or whatever is commonly used.
    { Qt::Key_Space,        QT_TRANSLATE_NOOP("QShortcut", "Space") },
    { Qt::Key_Escape,       QT_TRANSLATE_NOOP("QShortcut", "Esc") },
    { Qt::Key_Tab,          QT_TRANSLATE_NOOP("QShortcut", "Tab") },
    { Qt::Key_Backtab,      QT_TRANSLATE_NOOP("QShortcut", "Backtab") },
    { Qt::Key_Backspace,    QT_TRANSLATE_NOOP("QShortcut", "Backspace") },
    { Qt::Key_Return,       QT_TRANSLATE_NOOP("QShortcut", "Return") },
    { Qt::Key_Enter,        QT_TRANSLATE_NOOP("QShortcut", "Enter") },
    { Qt::Key_Insert,       QT_TRANSLATE_NOOP("QShortcut", "Ins") },
    { Qt::Key_Delete,       QT_TRANSLATE_NOOP("QShortcut", "Del") },
    { Qt::Key_Pause,        QT_TRANSLATE_NOOP("QShortcut", "Pause") },
    { Qt::Key_Print,        QT_TRANSLATE_NOOP("QShortcut", "Print") },
    { Qt::Key_SysReq,       QT_TRANSLATE_NOOP("QShortcut", "SysReq") },
    { Qt::Key_Home,         QT_TRANSLATE_NOOP("QShortcut", "Home") },
    { Qt::Key_End,          QT_TRANSLATE_NOOP("QShortcut", "End") },
    { Qt::Key_Left,         QT_TRANSLATE_NOOP("QShortcut", "Left") },
    { Qt::Key_Up,           QT_TRANSLATE_NOOP("QShortcut", "Up") },
    { Qt::Key_Right,        QT_TRANSLATE_NOOP("QShortcut", "Right") },
    { Qt::Key_Down,         QT_TRANSLATE_NOOP("QShortcut", "Down") },
    { Qt::Key_PageUp,       QT_TRANSLATE_NOOP("QShortcut", "PgUp") },
    { Qt::Key_PageDown,     QT_TRANSLATE_NOOP("QShortcut", "PgDown") },
    { Qt::Key_CapsLock,     QT_TRANSLATE_NOOP("QShortcut", "CapsLock") },
    { Qt::Key_NumLock,      QT_TRANSLATE_NOOP("QShortcut", "NumLock") },
    { Qt::Key_ScrollLock,   QT_TRANSLATE_NOOP("QShortcut", "ScrollLock") },
    { Qt::Key_Menu,         QT_TRANSLATE_NOOP("QShortcut", "Menu") },
    { Qt::Key_Help,         QT_TRANSLATE_NOOP("QShortcut", "Help") },
 
    // Special keys
    // Includes multimedia, launcher, lan keys ( bluetooth, wireless )
    // window navigation
    { Qt::Key_Back,                       QT_TRANSLATE_NOOP("QShortcut", "Back") },
    { Qt::Key_Forward,                    QT_TRANSLATE_NOOP("QShortcut", "Forward") },
    { Qt::Key_Stop,                       QT_TRANSLATE_NOOP("QShortcut", "Stop") },
    { Qt::Key_Refresh,                    QT_TRANSLATE_NOOP("QShortcut", "Refresh") },
    { Qt::Key_VolumeDown,                 QT_TRANSLATE_NOOP("QShortcut", "Volume Down") },
    { Qt::Key_VolumeMute,                 QT_TRANSLATE_NOOP("QShortcut", "Volume Mute") },
    { Qt::Key_VolumeUp,                   QT_TRANSLATE_NOOP("QShortcut", "Volume Up") },
    { Qt::Key_BassBoost,                  QT_TRANSLATE_NOOP("QShortcut", "Bass Boost") },
    { Qt::Key_BassUp,                     QT_TRANSLATE_NOOP("QShortcut", "Bass Up") },
    { Qt::Key_BassDown,                   QT_TRANSLATE_NOOP("QShortcut", "Bass Down") },
    { Qt::Key_TrebleUp,                   QT_TRANSLATE_NOOP("QShortcut", "Treble Up") },
    { Qt::Key_TrebleDown,                 QT_TRANSLATE_NOOP("QShortcut", "Treble Down") },
    { Qt::Key_MediaPlay,                  QT_TRANSLATE_NOOP("QShortcut", "Media Play") },
    { Qt::Key_MediaStop,                  QT_TRANSLATE_NOOP("QShortcut", "Media Stop") },
    { Qt::Key_MediaPrevious,              QT_TRANSLATE_NOOP("QShortcut", "Media Previous") },
    { Qt::Key_MediaNext,                  QT_TRANSLATE_NOOP("QShortcut", "Media Next") },
    { Qt::Key_MediaRecord,                QT_TRANSLATE_NOOP("QShortcut", "Media Record") },
    //: Media player pause button
    { Qt::Key_MediaPause,                 QT_TRANSLATE_NOOP("QShortcut", "Media Pause") },
    //: Media player button to toggle between playing and paused
    { Qt::Key_MediaTogglePlayPause,       QT_TRANSLATE_NOOP("QShortcut", "Toggle Media Play/Pause") },
    { Qt::Key_HomePage,                   QT_TRANSLATE_NOOP("QShortcut", "Home Page") },
    { Qt::Key_Favorites,                  QT_TRANSLATE_NOOP("QShortcut", "Favorites") },
    { Qt::Key_Search,                     QT_TRANSLATE_NOOP("QShortcut", "Search") },
    { Qt::Key_Standby,                    QT_TRANSLATE_NOOP("QShortcut", "Standby") },
    { Qt::Key_OpenUrl,                    QT_TRANSLATE_NOOP("QShortcut", "Open URL") },
    { Qt::Key_LaunchMail,                 QT_TRANSLATE_NOOP("QShortcut", "Launch Mail") },
    { Qt::Key_LaunchMedia,                QT_TRANSLATE_NOOP("QShortcut", "Launch Media") },
    { Qt::Key_Launch0,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (0)") },
    { Qt::Key_Launch1,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (1)") },
    { Qt::Key_Launch2,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (2)") },
    { Qt::Key_Launch3,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (3)") },
    { Qt::Key_Launch4,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (4)") },
    { Qt::Key_Launch5,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (5)") },
    { Qt::Key_Launch6,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (6)") },
    { Qt::Key_Launch7,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (7)") },
    { Qt::Key_Launch8,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (8)") },
    { Qt::Key_Launch9,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (9)") },
    { Qt::Key_LaunchA,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (A)") },
    { Qt::Key_LaunchB,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (B)") },
    { Qt::Key_LaunchC,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (C)") },
    { Qt::Key_LaunchD,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (D)") },
    { Qt::Key_LaunchE,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (E)") },
    { Qt::Key_LaunchF,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (F)") },
    { Qt::Key_LaunchG,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (G)") },
    { Qt::Key_LaunchH,                    QT_TRANSLATE_NOOP("QShortcut", "Launch (H)") },
    { Qt::Key_MonBrightnessUp,            QT_TRANSLATE_NOOP("QShortcut", "Monitor Brightness Up") },
    { Qt::Key_MonBrightnessDown,          QT_TRANSLATE_NOOP("QShortcut", "Monitor Brightness Down") },
    { Qt::Key_KeyboardLightOnOff,         QT_TRANSLATE_NOOP("QShortcut", "Keyboard Light On/Off") },
    { Qt::Key_KeyboardBrightnessUp,       QT_TRANSLATE_NOOP("QShortcut", "Keyboard Brightness Up") },
    { Qt::Key_KeyboardBrightnessDown,     QT_TRANSLATE_NOOP("QShortcut", "Keyboard Brightness Down") },
    { Qt::Key_PowerOff,                   QT_TRANSLATE_NOOP("QShortcut", "Power Off") },
    { Qt::Key_WakeUp,                     QT_TRANSLATE_NOOP("QShortcut", "Wake Up") },
    { Qt::Key_Eject,                      QT_TRANSLATE_NOOP("QShortcut", "Eject") },
    { Qt::Key_ScreenSaver,                QT_TRANSLATE_NOOP("QShortcut", "Screensaver") },
    { Qt::Key_WWW,                        QT_TRANSLATE_NOOP("QShortcut", "WWW") },
    { Qt::Key_Sleep,                      QT_TRANSLATE_NOOP("QShortcut", "Sleep") },
    { Qt::Key_LightBulb,                  QT_TRANSLATE_NOOP("QShortcut", "LightBulb") },
    { Qt::Key_Shop,                       QT_TRANSLATE_NOOP("QShortcut", "Shop") },
    { Qt::Key_History,                    QT_TRANSLATE_NOOP("QShortcut", "History") },
    { Qt::Key_AddFavorite,                QT_TRANSLATE_NOOP("QShortcut", "Add Favorite") },
    { Qt::Key_HotLinks,                   QT_TRANSLATE_NOOP("QShortcut", "Hot Links") },
    { Qt::Key_BrightnessAdjust,           QT_TRANSLATE_NOOP("QShortcut", "Adjust Brightness") },
    { Qt::Key_Finance,                    QT_TRANSLATE_NOOP("QShortcut", "Finance") },
    { Qt::Key_Community,                  QT_TRANSLATE_NOOP("QShortcut", "Community") },
    { Qt::Key_AudioRewind,                QT_TRANSLATE_NOOP("QShortcut", "Media Rewind") },
    { Qt::Key_BackForward,                QT_TRANSLATE_NOOP("QShortcut", "Back Forward") },
    { Qt::Key_ApplicationLeft,            QT_TRANSLATE_NOOP("QShortcut", "Application Left") },
    { Qt::Key_ApplicationRight,           QT_TRANSLATE_NOOP("QShortcut", "Application Right") },
    { Qt::Key_Book,                       QT_TRANSLATE_NOOP("QShortcut", "Book") },
    { Qt::Key_CD,                         QT_TRANSLATE_NOOP("QShortcut", "CD") },
    { Qt::Key_Calculator,                 QT_TRANSLATE_NOOP("QShortcut", "Calculator") },
    { Qt::Key_Calendar,                   QT_TRANSLATE_NOOP("QShortcut", "Calendar") },
    { Qt::Key_Clear,                      QT_TRANSLATE_NOOP("QShortcut", "Clear") },
    { Qt::Key_ClearGrab,                  QT_TRANSLATE_NOOP("QShortcut", "Clear Grab") },
    { Qt::Key_Close,                      QT_TRANSLATE_NOOP("QShortcut", "Close") },
    { Qt::Key_ContrastAdjust,             QT_TRANSLATE_NOOP("QShortcut", "Adjust contrast") },
    { Qt::Key_Copy,                       QT_TRANSLATE_NOOP("QShortcut", "Copy") },
    { Qt::Key_Cut,                        QT_TRANSLATE_NOOP("QShortcut", "Cut") },
    { Qt::Key_Display,                    QT_TRANSLATE_NOOP("QShortcut", "Display") },
    { Qt::Key_DOS,                        QT_TRANSLATE_NOOP("QShortcut", "DOS") },
    { Qt::Key_Documents,                  QT_TRANSLATE_NOOP("QShortcut", "Documents") },
    { Qt::Key_Excel,                      QT_TRANSLATE_NOOP("QShortcut", "Spreadsheet") },
    { Qt::Key_Explorer,                   QT_TRANSLATE_NOOP("QShortcut", "Browser") },
    { Qt::Key_Game,                       QT_TRANSLATE_NOOP("QShortcut", "Game") },
    { Qt::Key_Go,                         QT_TRANSLATE_NOOP("QShortcut", "Go") },
    { Qt::Key_iTouch,                     QT_TRANSLATE_NOOP("QShortcut", "iTouch") },
    { Qt::Key_LogOff,                     QT_TRANSLATE_NOOP("QShortcut", "Logoff") },
    { Qt::Key_Market,                     QT_TRANSLATE_NOOP("QShortcut", "Market") },
    { Qt::Key_Meeting,                    QT_TRANSLATE_NOOP("QShortcut", "Meeting") },
    { Qt::Key_Memo,                       QT_TRANSLATE_NOOP("QShortcut", "Memo") },
    { Qt::Key_MenuKB,                     QT_TRANSLATE_NOOP("QShortcut", "Keyboard Menu") },
    { Qt::Key_MenuPB,                     QT_TRANSLATE_NOOP("QShortcut", "Menu PB") },
    { Qt::Key_MySites,                    QT_TRANSLATE_NOOP("QShortcut", "My Sites") },
    { Qt::Key_News,                       QT_TRANSLATE_NOOP("QShortcut", "News") },
    { Qt::Key_OfficeHome,                 QT_TRANSLATE_NOOP("QShortcut", "Home Office") },
    { Qt::Key_Option,                     QT_TRANSLATE_NOOP("QShortcut", "Option") },
    { Qt::Key_Paste,                      QT_TRANSLATE_NOOP("QShortcut", "Paste") },
    { Qt::Key_Phone,                      QT_TRANSLATE_NOOP("QShortcut", "Phone") },
    { Qt::Key_Reply,                      QT_TRANSLATE_NOOP("QShortcut", "Reply") },
    { Qt::Key_Reload,                     QT_TRANSLATE_NOOP("QShortcut", "Reload") },
    { Qt::Key_RotateWindows,              QT_TRANSLATE_NOOP("QShortcut", "Rotate Windows") },
    { Qt::Key_RotationPB,                 QT_TRANSLATE_NOOP("QShortcut", "Rotation PB") },
    { Qt::Key_RotationKB,                 QT_TRANSLATE_NOOP("QShortcut", "Rotation KB") },
    { Qt::Key_Save,                       QT_TRANSLATE_NOOP("QShortcut", "Save") },
    { Qt::Key_Send,                       QT_TRANSLATE_NOOP("QShortcut", "Send") },
    { Qt::Key_Spell,                      QT_TRANSLATE_NOOP("QShortcut", "Spellchecker") },
    { Qt::Key_SplitScreen,                QT_TRANSLATE_NOOP("QShortcut", "Split Screen") },
    { Qt::Key_Support,                    QT_TRANSLATE_NOOP("QShortcut", "Support") },
    { Qt::Key_TaskPane,                   QT_TRANSLATE_NOOP("QShortcut", "Task Panel") },
    { Qt::Key_Terminal,                   QT_TRANSLATE_NOOP("QShortcut", "Terminal") },
    { Qt::Key_ToDoList,                   QT_TRANSLATE_NOOP("QShortcut", "To-do list") },
    { Qt::Key_Tools,                      QT_TRANSLATE_NOOP("QShortcut", "Tools") },
    { Qt::Key_Travel,                     QT_TRANSLATE_NOOP("QShortcut", "Travel") },
    { Qt::Key_Video,                      QT_TRANSLATE_NOOP("QShortcut", "Video") },
    { Qt::Key_Word,                       QT_TRANSLATE_NOOP("QShortcut", "Word Processor") },
    { Qt::Key_Xfer,                       QT_TRANSLATE_NOOP("QShortcut", "XFer") },
    { Qt::Key_ZoomIn,                     QT_TRANSLATE_NOOP("QShortcut", "Zoom In") },
    { Qt::Key_ZoomOut,                    QT_TRANSLATE_NOOP("QShortcut", "Zoom Out") },
    { Qt::Key_Away,                       QT_TRANSLATE_NOOP("QShortcut", "Away") },
    { Qt::Key_Messenger,                  QT_TRANSLATE_NOOP("QShortcut", "Messenger") },
    { Qt::Key_WebCam,                     QT_TRANSLATE_NOOP("QShortcut", "WebCam") },
    { Qt::Key_MailForward,                QT_TRANSLATE_NOOP("QShortcut", "Mail Forward") },
    { Qt::Key_Pictures,                   QT_TRANSLATE_NOOP("QShortcut", "Pictures") },
    { Qt::Key_Music,                      QT_TRANSLATE_NOOP("QShortcut", "Music") },
    { Qt::Key_Battery,                    QT_TRANSLATE_NOOP("QShortcut", "Battery") },
    { Qt::Key_Bluetooth,                  QT_TRANSLATE_NOOP("QShortcut", "Bluetooth") },
    { Qt::Key_WLAN,                       QT_TRANSLATE_NOOP("QShortcut", "Wireless") },
    { Qt::Key_UWB,                        QT_TRANSLATE_NOOP("QShortcut", "Ultra Wide Band") },
    { Qt::Key_AudioForward,               QT_TRANSLATE_NOOP("QShortcut", "Media Fast Forward") },
    { Qt::Key_AudioRepeat,                QT_TRANSLATE_NOOP("QShortcut", "Audio Repeat") },
    { Qt::Key_AudioRandomPlay,            QT_TRANSLATE_NOOP("QShortcut", "Audio Random Play") },
    { Qt::Key_Subtitle,                   QT_TRANSLATE_NOOP("QShortcut", "Subtitle") },
    { Qt::Key_AudioCycleTrack,            QT_TRANSLATE_NOOP("QShortcut", "Audio Cycle Track") },
    { Qt::Key_Time,                       QT_TRANSLATE_NOOP("QShortcut", "Time") },
    { Qt::Key_Hibernate,                  QT_TRANSLATE_NOOP("QShortcut", "Hibernate") },
    { Qt::Key_View,                       QT_TRANSLATE_NOOP("QShortcut", "View") },
    { Qt::Key_TopMenu,                    QT_TRANSLATE_NOOP("QShortcut", "Top Menu") },
    { Qt::Key_PowerDown,                  QT_TRANSLATE_NOOP("QShortcut", "Power Down") },
    { Qt::Key_Suspend,                    QT_TRANSLATE_NOOP("QShortcut", "Suspend") },
 
    { Qt::Key_MicMute,                    QT_TRANSLATE_NOOP("QShortcut", "Microphone Mute") },
 
    { Qt::Key_Red,                        QT_TRANSLATE_NOOP("QShortcut", "Red") },
    { Qt::Key_Green,                      QT_TRANSLATE_NOOP("QShortcut", "Green") },
    { Qt::Key_Yellow,                     QT_TRANSLATE_NOOP("QShortcut", "Yellow") },
    { Qt::Key_Blue,                       QT_TRANSLATE_NOOP("QShortcut", "Blue") },
 
    { Qt::Key_ChannelUp,                  QT_TRANSLATE_NOOP("QShortcut", "Channel Up") },
    { Qt::Key_ChannelDown,                QT_TRANSLATE_NOOP("QShortcut", "Channel Down") },
 
    { Qt::Key_Guide,                      QT_TRANSLATE_NOOP("QShortcut", "Guide") },
    { Qt::Key_Info,                       QT_TRANSLATE_NOOP("QShortcut", "Info") },
    { Qt::Key_Settings,                   QT_TRANSLATE_NOOP("QShortcut", "Settings") },
 
    { Qt::Key_MicVolumeUp,                QT_TRANSLATE_NOOP("QShortcut", "Microphone Volume Up") },
    { Qt::Key_MicVolumeDown,              QT_TRANSLATE_NOOP("QShortcut", "Microphone Volume Down") },
 
    { Qt::Key_New,                        QT_TRANSLATE_NOOP("QShortcut", "New") },
    { Qt::Key_Open,                       QT_TRANSLATE_NOOP("QShortcut", "Open") },
    { Qt::Key_Find,                       QT_TRANSLATE_NOOP("QShortcut", "Find") },
    { Qt::Key_Undo,                       QT_TRANSLATE_NOOP("QShortcut", "Undo") },
    { Qt::Key_Redo,                       QT_TRANSLATE_NOOP("QShortcut", "Redo") },
 
    // --------------------------------------------------------------
    // More consistent namings
    { Qt::Key_Print,        QT_TRANSLATE_NOOP("QShortcut", "Print Screen") },
    { Qt::Key_PageUp,       QT_TRANSLATE_NOOP("QShortcut", "Page Up") },
    { Qt::Key_PageDown,     QT_TRANSLATE_NOOP("QShortcut", "Page Down") },
    { Qt::Key_CapsLock,     QT_TRANSLATE_NOOP("QShortcut", "Caps Lock") },
    { Qt::Key_NumLock,      QT_TRANSLATE_NOOP("QShortcut", "Num Lock") },
    { Qt::Key_NumLock,      QT_TRANSLATE_NOOP("QShortcut", "Number Lock") },
    { Qt::Key_ScrollLock,   QT_TRANSLATE_NOOP("QShortcut", "Scroll Lock") },
    { Qt::Key_Insert,       QT_TRANSLATE_NOOP("QShortcut", "Insert") },
    { Qt::Key_Delete,       QT_TRANSLATE_NOOP("QShortcut", "Delete") },
    { Qt::Key_Escape,       QT_TRANSLATE_NOOP("QShortcut", "Escape") },
    { Qt::Key_SysReq,       QT_TRANSLATE_NOOP("QShortcut", "System Request") },
 
    // --------------------------------------------------------------
    // Keypad navigation keys
    { Qt::Key_Select,       QT_TRANSLATE_NOOP("QShortcut", "Select") },
    { Qt::Key_Yes,          QT_TRANSLATE_NOOP("QShortcut", "Yes") },
    { Qt::Key_No,           QT_TRANSLATE_NOOP("QShortcut", "No") },
 
    // --------------------------------------------------------------
    // Device keys
    { Qt::Key_Context1,         QT_TRANSLATE_NOOP("QShortcut", "Context1") },
    { Qt::Key_Context2,         QT_TRANSLATE_NOOP("QShortcut", "Context2") },
    { Qt::Key_Context3,         QT_TRANSLATE_NOOP("QShortcut", "Context3") },
    { Qt::Key_Context4,         QT_TRANSLATE_NOOP("QShortcut", "Context4") },
    //: Button to start a call (note: a separate button is used to end the call)
    { Qt::Key_Call,             QT_TRANSLATE_NOOP("QShortcut", "Call") },
    //: Button to end a call (note: a separate button is used to start the call)
    { Qt::Key_Hangup,           QT_TRANSLATE_NOOP("QShortcut", "Hangup") },
    //: Button that will hang up if we're in call, or make a call if we're not.
    { Qt::Key_ToggleCallHangup, QT_TRANSLATE_NOOP("QShortcut", "Toggle Call/Hangup") },
    { Qt::Key_Flip,             QT_TRANSLATE_NOOP("QShortcut", "Flip") },
    //: Button to trigger voice dialing
    { Qt::Key_VoiceDial,        QT_TRANSLATE_NOOP("QShortcut", "Voice Dial") },
    //: Button to redial the last number called
    { Qt::Key_LastNumberRedial, QT_TRANSLATE_NOOP("QShortcut", "Last Number Redial") },
    //: Button to trigger the camera shutter (take a picture)
    { Qt::Key_Camera,           QT_TRANSLATE_NOOP("QShortcut", "Camera Shutter") },
    //: Button to focus the camera
    { Qt::Key_CameraFocus,      QT_TRANSLATE_NOOP("QShortcut", "Camera Focus") },
 
    // --------------------------------------------------------------
    // Japanese keyboard support
    { Qt::Key_Kanji,            QT_TRANSLATE_NOOP("QShortcut", "Kanji") },
    { Qt::Key_Muhenkan,         QT_TRANSLATE_NOOP("QShortcut", "Muhenkan") },
    { Qt::Key_Henkan,           QT_TRANSLATE_NOOP("QShortcut", "Henkan") },
    { Qt::Key_Romaji,           QT_TRANSLATE_NOOP("QShortcut", "Romaji") },
    { Qt::Key_Hiragana,         QT_TRANSLATE_NOOP("QShortcut", "Hiragana") },
    { Qt::Key_Katakana,         QT_TRANSLATE_NOOP("QShortcut", "Katakana") },
    { Qt::Key_Hiragana_Katakana,QT_TRANSLATE_NOOP("QShortcut", "Hiragana Katakana") },
    { Qt::Key_Zenkaku,          QT_TRANSLATE_NOOP("QShortcut", "Zenkaku") },
    { Qt::Key_Hankaku,          QT_TRANSLATE_NOOP("QShortcut", "Hankaku") },
    { Qt::Key_Zenkaku_Hankaku,  QT_TRANSLATE_NOOP("QShortcut", "Zenkaku Hankaku") },
    { Qt::Key_Touroku,          QT_TRANSLATE_NOOP("QShortcut", "Touroku") },
    { Qt::Key_Massyo,           QT_TRANSLATE_NOOP("QShortcut", "Massyo") },
    { Qt::Key_Kana_Lock,        QT_TRANSLATE_NOOP("QShortcut", "Kana Lock") },
    { Qt::Key_Kana_Shift,       QT_TRANSLATE_NOOP("QShortcut", "Kana Shift") },
    { Qt::Key_Eisu_Shift,       QT_TRANSLATE_NOOP("QShortcut", "Eisu Shift") },
    { Qt::Key_Eisu_toggle,      QT_TRANSLATE_NOOP("QShortcut", "Eisu toggle") },
    { Qt::Key_Codeinput,        QT_TRANSLATE_NOOP("QShortcut", "Code input") },
    { Qt::Key_MultipleCandidate,QT_TRANSLATE_NOOP("QShortcut", "Multiple Candidate") },
    { Qt::Key_PreviousCandidate,QT_TRANSLATE_NOOP("QShortcut", "Previous Candidate") },
 
    // --------------------------------------------------------------
    // Korean keyboard support
    { Qt::Key_Hangul,          QT_TRANSLATE_NOOP("QShortcut", "Hangul") },
    { Qt::Key_Hangul_Start,    QT_TRANSLATE_NOOP("QShortcut", "Hangul Start") },
    { Qt::Key_Hangul_End,      QT_TRANSLATE_NOOP("QShortcut", "Hangul End") },
    { Qt::Key_Hangul_Hanja,    QT_TRANSLATE_NOOP("QShortcut", "Hangul Hanja") },
    { Qt::Key_Hangul_Jamo,     QT_TRANSLATE_NOOP("QShortcut", "Hangul Jamo") },
    { Qt::Key_Hangul_Romaja,   QT_TRANSLATE_NOOP("QShortcut", "Hangul Romaja") },
    { Qt::Key_Hangul_Jeonja,   QT_TRANSLATE_NOOP("QShortcut", "Hangul Jeonja") },
    { Qt::Key_Hangul_Banja,    QT_TRANSLATE_NOOP("QShortcut", "Hangul Banja") },
    { Qt::Key_Hangul_PreHanja, QT_TRANSLATE_NOOP("QShortcut", "Hangul PreHanja") },
    { Qt::Key_Hangul_PostHanja,QT_TRANSLATE_NOOP("QShortcut", "Hangul PostHanja") },
    { Qt::Key_Hangul_Special,  QT_TRANSLATE_NOOP("QShortcut", "Hangul Special") },
 
    // --------------------------------------------------------------
    // Miscellaneous keys
    { Qt::Key_Cancel,  QT_TRANSLATE_NOOP("QShortcut", "Cancel") },
    { Qt::Key_Printer,  QT_TRANSLATE_NOOP("QShortcut", "Printer") },
    { Qt::Key_Execute,  QT_TRANSLATE_NOOP("QShortcut", "Execute") },
    { Qt::Key_Play,  QT_TRANSLATE_NOOP("QShortcut", "Play") },
    { Qt::Key_Zoom,  QT_TRANSLATE_NOOP("QShortcut", "Zoom") },
    { Qt::Key_Exit,  QT_TRANSLATE_NOOP("QShortcut", "Exit") },
    { Qt::Key_TouchpadToggle,  QT_TRANSLATE_NOOP("QShortcut", "Touchpad Toggle") },
    { Qt::Key_TouchpadOn,  QT_TRANSLATE_NOOP("QShortcut", "Touchpad On") },
    { Qt::Key_TouchpadOff,  QT_TRANSLATE_NOOP("QShortcut", "Touchpad Off") },
    { Qt::Key_Shift,  QT_TRANSLATE_NOOP("QShortcut", "Shift") },
    { Qt::Key_Control,  QT_TRANSLATE_NOOP("QShortcut", "Control") },
    { Qt::Key_Alt,  QT_TRANSLATE_NOOP("QShortcut", "Alt") },
    { Qt::Key_Meta,  QT_TRANSLATE_NOOP("QShortcut", "Meta") },
 
};
static constexpr int numKeyNames = sizeof keyname / sizeof *keyname;
 
QKeySequence::QKeySequence(StandardKey key)
{
    const QList <QKeySequence> bindings = keyBindings(key);
    //pick only the first/primary shortcut from current bindings
    if (bindings.size() > 0) {
        d = bindings.first().d;
        d->ref.ref();
    }
    else
        d = new QKeySequencePrivate();
}
 
 
QKeySequence::QKeySequence()
{
    Q_CONSTINIT static QKeySequencePrivate shared_empty;
    d = &shared_empty;
    d->ref.ref();
}
 
QKeySequence::QKeySequence(const QString &key, QKeySequence::SequenceFormat format)
{
    d = new QKeySequencePrivate();
    assign(key, format);
}
 
static_assert(QKeySequencePrivate::MaxKeyCount == 4, "Change docs and ctor impl below");
QKeySequence::QKeySequence(int k1, int k2, int k3, int k4)
{
    d = new QKeySequencePrivate();
    d->key[0] = k1;
    d->key[1] = k2;
    d->key[2] = k3;
    d->key[3] = k4;
}
 
QKeySequence::QKeySequence(QKeyCombination k1, QKeyCombination k2, QKeyCombination k3, QKeyCombination k4)
    : QKeySequence(k1.toCombined(), k2.toCombined(), k3.toCombined(), k4.toCombined())
{
}
 
QKeySequence::QKeySequence(const QKeySequence& keysequence)
    : d(keysequence.d)
{
    d->ref.ref();
}
 
QList<QKeySequence> QKeySequence::keyBindings(StandardKey key)
{
    return QGuiApplicationPrivate::platformTheme()->keyBindings(key);
}
 
QKeySequence::~QKeySequence()
{
    if (!d->ref.deref())
        delete d;
}
 
void QKeySequence::setKey(QKeyCombination key, int index)
{
    Q_ASSERT_X(index >= 0 && index < QKeySequencePrivate::MaxKeyCount, "QKeySequence::setKey", "index out of range");
    qAtomicDetach(d);
    d->key[index] = key.toCombined();
}
 
static_assert(QKeySequencePrivate::MaxKeyCount == 4, "Change docs below");
int QKeySequence::count() const
{
    return int(std::distance(d->key, std::find(d->key, d->key + QKeySequencePrivate::MaxKeyCount, 0)));
}
 
 
bool QKeySequence::isEmpty() const
{
    return !d->key[0];
}
 
 
QKeySequence QKeySequence::mnemonic(const QString &text)
{
    QKeySequence ret;
 
    if (qt_sequence_no_mnemonics)
        return ret;
 
    bool found = false;
    qsizetype p = 0;
    while (p >= 0) {
        p = text.indexOf(u'&', p) + 1;
        if (p <= 0 || p >= (int)text.size())
            break;
        if (text.at(p) != u'&') {
            QChar c = text.at(p);
            if (c.isPrint()) {
                if (!found) {
                    c = c.toUpper();
                    ret = QKeySequence(QKeyCombination(Qt::ALT, Qt::Key(c.unicode())));
#ifdef QT_NO_DEBUG
                    return ret;
#else
                    found = true;
                } else {
                    qWarning("QKeySequence::mnemonic: \"%s\" contains multiple occurrences of '&'", qPrintable(text));
#endif
                }
            }
        }
        p++;
    }
    return ret;
}
 
int QKeySequence::assign(const QString &ks)
{
    return assign(ks, NativeText);
}
 
int QKeySequence::assign(const QString &ks, QKeySequence::SequenceFormat format)
{
    QString keyseq = ks;
    int n = 0;
    qsizetype p = 0, diff = 0;
 
    // Run through the whole string, but stop
    // if we have MaxKeyCount keys before the end.
    while (keyseq.size() && n < QKeySequencePrivate::MaxKeyCount) {
        // We MUST use something to separate each sequence, and space
        // does not cut it, since some of the key names have space
        // in them.. (Let's hope no one translate with a comma in it:)
        p = keyseq.indexOf(u',');
        if (-1 != p) {
            if (p == keyseq.size() - 1) { // Last comma 'Ctrl+,'
                p = -1;
            } else {
                if (u',' == keyseq.at(p+1)) // e.g. 'Ctrl+,, Shift+,,'
                    p++;
                if (u' ' == keyseq.at(p+1)) { // Space after comma
                    diff = 1;
                    p++;
                } else {
                    diff = 0;
                }
            }
        }
        QString part = keyseq.left(-1 == p ? keyseq.size() : p - diff);
        keyseq = keyseq.right(-1 == p ? 0 : keyseq.size() - (p + 1));
        d->key[n] = QKeySequencePrivate::decodeString(std::move(part), format);
        ++n;
    }
    return n;
}
 
struct QModifKeyName {
    QModifKeyName() { }
    QModifKeyName(int q, QChar n) : qt_key(q), name(n) { }
    QModifKeyName(int q, const QString &n) : qt_key(q), name(n) { }
    int qt_key;
    QString name;
};
Q_DECLARE_TYPEINFO(QModifKeyName, Q_RELOCATABLE_TYPE);
 
Q_GLOBAL_STATIC(QList<QModifKeyName>, globalModifs)
Q_GLOBAL_STATIC(QList<QModifKeyName>, globalPortableModifs)
 
 
int QKeySequence::decodeString(const QString &str)
{
    return QKeySequencePrivate::decodeString(str, NativeText);
}
 
int QKeySequencePrivate::decodeString(QString accel, QKeySequence::SequenceFormat format)
{
    Q_ASSERT(!accel.isEmpty());
 
    int ret = 0;
    accel = std::move(accel).toLower();
    bool nativeText = (format == QKeySequence::NativeText);
 
    QList<QModifKeyName> *gmodifs;
    if (nativeText) {
        gmodifs = globalModifs();
        if (gmodifs->isEmpty()) {
#if defined(Q_OS_APPLE)
            const bool dontSwap = qApp->testAttribute(Qt::AA_MacDontSwapCtrlAndMeta);
            if (dontSwap)
                *gmodifs << QModifKeyName(Qt::META, QChar(kCommandUnicode));
            else
                *gmodifs << QModifKeyName(Qt::CTRL, QChar(kCommandUnicode));
            *gmodifs << QModifKeyName(Qt::ALT, QChar(kOptionUnicode));
            if (dontSwap)
                *gmodifs << QModifKeyName(Qt::CTRL, QChar(kControlUnicode));
            else
                *gmodifs << QModifKeyName(Qt::META, QChar(kControlUnicode));
            *gmodifs << QModifKeyName(Qt::SHIFT, QChar(kShiftUnicode));
#endif
            *gmodifs << QModifKeyName(Qt::CTRL, u"ctrl+"_s)
                     << QModifKeyName(Qt::SHIFT, u"shift+"_s)
                     << QModifKeyName(Qt::ALT, u"alt+"_s)
                     << QModifKeyName(Qt::META, u"meta+"_s)
                     << QModifKeyName(Qt::KeypadModifier, u"num+"_s);
        }
    } else {
        gmodifs = globalPortableModifs();
        if (gmodifs->isEmpty()) {
            *gmodifs << QModifKeyName(Qt::CTRL, u"ctrl+"_s)
                     << QModifKeyName(Qt::SHIFT, u"shift+"_s)
                     << QModifKeyName(Qt::ALT, u"alt+"_s)
                     << QModifKeyName(Qt::META, u"meta+"_s)
                     << QModifKeyName(Qt::KeypadModifier, u"num+"_s);
        }
    }
 
 
    QList<QModifKeyName> modifs;
    if (nativeText) {
        modifs << QModifKeyName(Qt::CTRL, QCoreApplication::translate("QShortcut", "Ctrl").toLower().append(u'+'))
               << QModifKeyName(Qt::SHIFT, QCoreApplication::translate("QShortcut", "Shift").toLower().append(u'+'))
               << QModifKeyName(Qt::ALT, QCoreApplication::translate("QShortcut", "Alt").toLower().append(u'+'))
               << QModifKeyName(Qt::META, QCoreApplication::translate("QShortcut", "Meta").toLower().append(u'+'))
               << QModifKeyName(Qt::KeypadModifier, QCoreApplication::translate("QShortcut", "Num").toLower().append(u'+'));
    }
    modifs += *gmodifs; // Test non-translated ones last
 
    QString sl = accel;
#if defined(Q_OS_APPLE)
    for (int i = 0; i < modifs.size(); ++i) {
        const QModifKeyName &mkf = modifs.at(i);
        if (sl.contains(mkf.name)) {
            ret |= mkf.qt_key;
            accel.remove(mkf.name);
            sl = accel;
        }
    }
    if (accel.isEmpty()) // Incomplete, like for "Meta+Shift+"
        return Qt::Key_unknown;
#endif
 
    qsizetype i = 0;
    qsizetype lastI = 0;
    while ((i = sl.indexOf(u'+', i + 1)) != -1) {
        const QStringView sub = QStringView{sl}.mid(lastI, i - lastI + 1);
        // If we get here the shortcuts contains at least one '+'. We break up
        // along the following strategy:
        //      Meta+Ctrl++   ( "Meta+", "Ctrl+", "+" )
        //      Super+Shift+A ( "Super+", "Shift+" )
        //      4+3+2=1       ( "4+", "3+" )
        // In other words, everything we try to handle HAS to be a modifier
        // except for a single '+' at the end of the string.
 
        // Only '+' can have length 1.
        if (sub.size() == 1) {
            // Make sure we only encounter a single '+' at the end of the accel
            if (accel.lastIndexOf(u'+') != accel.size()-1)
                return Qt::Key_unknown;
        } else {
            // Identify the modifier
            bool validModifier = false;
            for (int j = 0; j < modifs.size(); ++j) {
                const QModifKeyName &mkf = modifs.at(j);
                if (sub == mkf.name) {
                    ret |= mkf.qt_key;
                    validModifier = true;
                    break; // Shortcut, since if we find an other it would/should just be a dup
                }
            }
 
            if (!validModifier)
                return Qt::Key_unknown;
        }
        lastI = i + 1;
    }
 
    qsizetype p = accel.lastIndexOf(u'+', accel.size() - 2); // -2 so that Ctrl++ works
    QStringView accelRef(accel);
    if (p > 0)
        accelRef = accelRef.mid(p + 1);
 
    int fnum = 0;
    if (accelRef.size() == 1) {
#if defined(Q_OS_APPLE)
        int qtKey = qtkeyForAppleSymbol(accelRef.at(0));
        if (qtKey != -1) {
            ret |= qtKey;
        } else
#endif
        {
            ret |= accelRef.at(0).toUpper().unicode();
        }
    } else if (accelRef.at(0) == u'f' && (fnum = accelRef.mid(1).toInt()) >= 1 && fnum <= 35) {
        ret |= Qt::Key_F1 + fnum - 1;
    } else {
        // For NativeText, check the translation table first,
        // if we don't find anything then try it out with just the untranlated stuff.
        // PortableText will only try the untranlated table.
        bool found = false;
        for (int tran = 0; tran < 2; ++tran) {
            if (!nativeText)
                ++tran;
            for (int i = 0; i < numKeyNames; ++i) {
                QString keyName(tran == 0
                                ? QCoreApplication::translate("QShortcut", keyname[i].name)
                                : QString::fromLatin1(keyname[i].name));
                if (accelRef == std::move(keyName).toLower()) {
                    ret |= keyname[i].key;
                    found = true;
                    break;
                }
            }
            if (found)
                break;
        }
        // We couldn't translate the key.
        if (!found)
            return Qt::Key_unknown;
    }
    return ret;
}
 
QString QKeySequence::encodeString(int key)
{
    return QKeySequencePrivate::encodeString(key, NativeText);
}
 
static inline void addKey(QString &str, const QString &theKey, QKeySequence::SequenceFormat format)
{
    if (!str.isEmpty()) {
        if (format == QKeySequence::NativeText) {
            //: Key separator in shortcut string
            str += QCoreApplication::translate("QShortcut", "+");
        } else {
            str += u'+';
        }
    }
 
    str += theKey;
}
 
QString QKeySequencePrivate::encodeString(int key, QKeySequence::SequenceFormat format)
{
    bool nativeText = (format == QKeySequence::NativeText);
    QString s;
 
    // Handle -1 (Invalid Key) and Qt::Key_unknown gracefully
    if (key == -1 || key == Qt::Key_unknown)
        return s;
 
#if defined(Q_OS_APPLE)
    if (nativeText) {
        // On Apple platforms the order (by default) is Meta, Alt, Shift, Control.
        // If the AA_MacDontSwapCtrlAndMeta is enabled, then the order
        // is Ctrl, Alt, Shift, Meta. The appleSymbolForQtKey helper does this swap
        // for us, which means that we have to adjust our order here.
        // The upshot is a lot more infrastructure to keep the number of
        // if tests down and the code relatively clean.
        static constexpr int ModifierOrder[] = { Qt::META, Qt::ALT, Qt::SHIFT, Qt::CTRL, 0 };
        static constexpr int QtKeyOrder[] = { Qt::Key_Meta, Qt::Key_Alt, Qt::Key_Shift, Qt::Key_Control, 0 };
        static constexpr int DontSwapModifierOrder[] = { Qt::CTRL, Qt::ALT, Qt::SHIFT, Qt::META, 0 };
        static constexpr int DontSwapQtKeyOrder[] = { Qt::Key_Control, Qt::Key_Alt, Qt::Key_Shift, Qt::Key_Meta, 0 };
        const int *modifierOrder;
        const int *qtkeyOrder;
        if (qApp->testAttribute(Qt::AA_MacDontSwapCtrlAndMeta)) {
            modifierOrder = DontSwapModifierOrder;
            qtkeyOrder = DontSwapQtKeyOrder;
        } else {
            modifierOrder = ModifierOrder;
            qtkeyOrder = QtKeyOrder;
        }
 
        for (int i = 0; modifierOrder[i] != 0; ++i) {
            if (key & modifierOrder[i])
                s += appleSymbolForQtKey(qtkeyOrder[i]);
        }
    } else
#endif
    {
        // On other systems the order is Meta, Control, Alt, Shift
        if ((key & Qt::META) == Qt::META)
            s = nativeText ? QCoreApplication::translate("QShortcut", "Meta") : QString::fromLatin1("Meta");
        if ((key & Qt::CTRL) == Qt::CTRL)
            addKey(s, nativeText ? QCoreApplication::translate("QShortcut", "Ctrl") : QString::fromLatin1("Ctrl"), format);
        if ((key & Qt::ALT) == Qt::ALT)
            addKey(s, nativeText ? QCoreApplication::translate("QShortcut", "Alt") : QString::fromLatin1("Alt"), format);
        if ((key & Qt::SHIFT) == Qt::SHIFT)
            addKey(s, nativeText ? QCoreApplication::translate("QShortcut", "Shift") : QString::fromLatin1("Shift"), format);
    }
    if ((key & Qt::KeypadModifier) == Qt::KeypadModifier)
        addKey(s, nativeText ? QCoreApplication::translate("QShortcut", "Num") : QString::fromLatin1("Num"), format);
 
    QString p = keyName(key, format);
 
#if defined(Q_OS_APPLE)
    if (nativeText)
        s += p;
    else
#endif
    addKey(s, p, format);
    return s;
}
 
QString QKeySequencePrivate::keyName(int key, QKeySequence::SequenceFormat format)
{
    bool nativeText = (format == QKeySequence::NativeText);
    key &= ~(Qt::ShiftModifier | Qt::ControlModifier | Qt::AltModifier | Qt::MetaModifier | Qt::KeypadModifier);
    QString p;
 
    if (key && key < Qt::Key_Escape && key != Qt::Key_Space) {
        if (!QChar::requiresSurrogates(key)) {
            p = QChar::fromUcs2(key).toUpper();
        } else {
            p += QChar(QChar::highSurrogate(key));
            p += QChar(QChar::lowSurrogate(key));
        }
    } else if (key >= Qt::Key_F1 && key <= Qt::Key_F35) {
            p = nativeText ? QCoreApplication::translate("QShortcut", "F%1").arg(key - Qt::Key_F1 + 1)
                           : QString::fromLatin1("F%1").arg(key - Qt::Key_F1 + 1);
    } else if (key) {
        int i=0;
#if defined(Q_OS_APPLE)
        if (nativeText) {
            QChar ch = appleSymbolForQtKey(key);
            if (!ch.isNull())
                p = ch;
            else
                goto NonSymbol;
        } else
#endif
        {
#if defined(Q_OS_APPLE)
NonSymbol:
#endif
            while (i < numKeyNames) {
                if (key == keyname[i].key) {
                    p = nativeText ? QCoreApplication::translate("QShortcut", keyname[i].name)
                                   : QString::fromLatin1(keyname[i].name);
                    break;
                }
                ++i;
            }
            // If we can't find the actual translatable keyname,
            // fall back on the unicode representation of it...
            // Or else characters like Qt::Key_aring may not get displayed
            // (Really depends on you locale)
            if (i >= numKeyNames) {
                if (!QChar::requiresSurrogates(key)) {
                    p = QChar::fromUcs2(key).toUpper();
                } else {
                    p += QChar(QChar::highSurrogate(key));
                    p += QChar(QChar::lowSurrogate(key));
                }
            }
        }
    }
    return p;
}
QKeySequence::SequenceMatch QKeySequence::matches(const QKeySequence &seq) const
{
    uint userN = count(),
          seqN = seq.count();
 
    if (userN > seqN)
        return NoMatch;
 
    // If equal in length, we have a potential ExactMatch sequence,
    // else we already know it can only be partial.
    SequenceMatch match = (userN == seqN ? ExactMatch : PartialMatch);
 
    for (uint i = 0; i < userN; ++i) {
        QKeyCombination userKey = (*this)[i],
                    sequenceKey = seq[i];
        if (userKey != sequenceKey)
            return NoMatch;
    }
    return match;
}
 
QKeySequence::operator QVariant() const
{
    return QVariant::fromValue(*this);
}
 
QKeyCombination QKeySequence::operator[](uint index) const
{
    Q_ASSERT_X(index < QKeySequencePrivate::MaxKeyCount, "QKeySequence::operator[]", "index out of range");
    return QKeyCombination::fromCombined(d->key[index]);
}
 
 
QKeySequence &QKeySequence::operator=(const QKeySequence &other)
{
    qAtomicAssign(d, other.d);
    return *this;
}
 
bool QKeySequence::operator==(const QKeySequence &other) const
{
    return (d->key[0] == other.d->key[0] &&
            d->key[1] == other.d->key[1] &&
            d->key[2] == other.d->key[2] &&
            d->key[3] == other.d->key[3]);
}
 
size_t qHash(const QKeySequence &key, size_t seed) noexcept
{
    return qHashRange(key.d->key, key.d->key + QKeySequencePrivate::MaxKeyCount, seed);
}
 
bool QKeySequence::operator< (const QKeySequence &other) const
{
    return std::lexicographical_compare(d->key, d->key + QKeySequencePrivate::MaxKeyCount,
                                        other.d->key, other.d->key + QKeySequencePrivate::MaxKeyCount);
}
 
bool QKeySequence::isDetached() const
{
    return d->ref.loadRelaxed() == 1;
}
 
QString QKeySequence::toString(SequenceFormat format) const
{
    QString finalString;
    // A standard string, with no translation or anything like that. In some ways it will
    // look like our latin case on Windows and X11
    int end = count();
    for (int i = 0; i < end; ++i) {
        finalString += d->encodeString(d->key[i], format);
        finalString += ", "_L1;
    }
    finalString.truncate(finalString.size() - 2);
    return finalString;
}
 
QKeySequence QKeySequence::fromString(const QString &str, SequenceFormat format)
{
    return QKeySequence(str, format);
}
 
QList<QKeySequence> QKeySequence::listFromString(const QString &str, SequenceFormat format)
{
    QList<QKeySequence> result;
 
    const QStringList strings = str.split("; "_L1);
    result.reserve(strings.size());
    for (const QString &string : strings) {
        result << fromString(string, format);
    }
 
    return result;
}
 
QString QKeySequence::listToString(const QList<QKeySequence> &list, SequenceFormat format)
{
    QString result;
 
    for (const QKeySequence &sequence : list) {
        result += sequence.toString(format);
        result += "; "_L1;
    }
    result.truncate(result.size() - 2);
 
    return result;
}
 
/*****************************************************************************
  QKeySequence stream functions
 *****************************************************************************/
#if !defined(QT_NO_DATASTREAM)
QDataStream &operator<<(QDataStream &s, const QKeySequence &keysequence)
{
    static_assert(QKeySequencePrivate::MaxKeyCount == 4, "Forgot to adapt QDataStream &operator<<(QDataStream &s, const QKeySequence &keysequence) to new QKeySequence::MaxKeyCount");
    const bool extended = s.version() >= 5 && keysequence.count() > 1;
    s << quint32(extended ? 4 : 1) << quint32(keysequence.d->key[0]);
    if (extended) {
        s << quint32(keysequence.d->key[1])
          << quint32(keysequence.d->key[2])
          << quint32(keysequence.d->key[3]);
    }
    return s;
}
 
 
QDataStream &operator>>(QDataStream &s, QKeySequence &keysequence)
{
    const quint32 MaxKeys = QKeySequencePrivate::MaxKeyCount;
    quint32 c;
    s >> c;
    quint32 keys[MaxKeys] = {0};
    for (uint i = 0; i < qMin(c, MaxKeys); ++i) {
        if (s.atEnd()) {
            qWarning("Premature EOF while reading QKeySequence");
            return s;
        }
        s >> keys[i];
    }
    qAtomicDetach(keysequence.d);
    std::copy(keys, keys + MaxKeys, QT_MAKE_CHECKED_ARRAY_ITERATOR(keysequence.d->key, MaxKeys));
    return s;
}
 
#endif //QT_NO_DATASTREAM
 
#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QKeySequence &p)
{
    QDebugStateSaver saver(dbg);
    dbg.nospace() << "QKeySequence(" << p.toString() << ')';
    return dbg;
}
#endif
 
QT_END_NAMESPACE
 
#include "moc_qkeysequence.cpp"