platformsupport/input: add xkbcommon utilities lib

xcb/eglfs/wayland - all use XKB keyboard configs and APIs. There
is a lot of duplicated and naturally a diverging code. This patch
adds a helper library to avoid all the mentioned problems and unify
feature set between these platforms.

qlibinputkeyboard:

Added a fixup for 2803cdf758dbae1006a0c50300af12dac9f71531. From
spec: "keysyms, when bound to modifiers, affect the rules [..]",
meaning we can't look at keys in isolation, but have to check if
bounding exists in the keymap. This is done by using
xkb_state_mod_name_is_active() API, but that API has its limitations -
https://github.com/xkbcommon/libxkbcommon/issues/88
I will fix this separately in the LTS (5.12) branch.

We need to read the modifier state before the key action. This
patch fixes a regression introduced by aforementioned patch, which
caused modifiers being reported wrongly in QKeyEvent::modifiers().

qtwayland:

Moved toKeysym(QKeyEvent) from qtwayland repository into this library.
For this and other key mapping functionality wayland was duplicating
the key table. All of that will be removed from qtwayland, and calls
will be replaced to use this lib. Adjusted toKeysym() to fix QTBUG-71301.
Qt keys don't map to ASCII codes, so first we need search in our key
table, instead of mapping from unicode.

lookupStringNoKeysymTransformations():

fixed off-by-one error, where we were including terminating NUL in
QString.

Fixes: QTBUG-71301
Task-number: QTBUG-65503
Change-Id: Idfddea5b34ad620235dc08c0b9e5a0669111821a
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

1 files changed, 22 insertions, 701 deletions

diff --git a/src/plugins/platforms/xcb/qxcbkeyboard.cpp b/src/plugins/platforms/xcb/qxcbkeyboard.cpp
index c5dc7b21ad..6eb31d67bd 100644
--- a/src/plugins/platforms/xcb/qxcbkeyboard.cpp
+++ b/src/plugins/platforms/xcb/qxcbkeyboard.cpp
@@ -39,7 +39,6 @@
 #include "qxcbkeyboard.h"
 #include "qxcbwindow.h"
 #include "qxcbscreen.h"
-#include "qxcbxkbcommon.h"
 
 #include <qpa/qwindowsysteminterface.h>
 #include <qpa/qplatforminputcontext.h>
@@ -49,404 +48,20 @@
 #include <QtCore/QMetaEnum>
 
 #include <private/qguiapplication_p.h>
-#include <private/qmakearray_p.h>
 
-#include <xkbcommon/xkbcommon-keysyms.h>
+#if QT_CONFIG(xkb)
+#include <xkbcommon/xkbcommon-x11.h>
+#endif
 
 #if QT_CONFIG(xcb_xinput)
 #include <xcb/xinput.h>
 #endif
-QT_BEGIN_NAMESPACE
-
-typedef struct xkb2qt
-{
-    unsigned int xkb;
-    unsigned int qt;
-
-    constexpr bool operator <=(const xkb2qt &that) const noexcept
-    {
-        return xkb <= that.xkb;
-    }
-
-    constexpr bool operator <(const xkb2qt &that) const noexcept
-    {
-        return xkb < that.xkb;
-    }
-} xkb2qt_t;
 
-template<std::size_t Xkb, std::size_t Qt>
-struct Xkb2Qt
-{
-    using Type = xkb2qt_t;
-    static constexpr Type data() noexcept { return Type{Xkb, Qt}; }
-};
-
-static constexpr const auto KeyTbl = qMakeArray(
-    QSortedData<
-        // misc keys
-
-        Xkb2Qt<XKB_KEY_Escape,                  Qt::Key_Escape>,
-        Xkb2Qt<XKB_KEY_Tab,                     Qt::Key_Tab>,
-        Xkb2Qt<XKB_KEY_ISO_Left_Tab,            Qt::Key_Backtab>,
-        Xkb2Qt<XKB_KEY_BackSpace,               Qt::Key_Backspace>,
-        Xkb2Qt<XKB_KEY_Return,                  Qt::Key_Return>,
-        Xkb2Qt<XKB_KEY_Insert,                  Qt::Key_Insert>,
-        Xkb2Qt<XKB_KEY_Delete,                  Qt::Key_Delete>,
-        Xkb2Qt<XKB_KEY_Clear,                   Qt::Key_Delete>,
-        Xkb2Qt<XKB_KEY_Pause,                   Qt::Key_Pause>,
-        Xkb2Qt<XKB_KEY_Print,                   Qt::Key_Print>,
-        Xkb2Qt<0x1005FF60,                      Qt::Key_SysReq>,         // hardcoded Sun SysReq
-        Xkb2Qt<0x1007ff00,                      Qt::Key_SysReq>,         // hardcoded X386 SysReq
-
-        // cursor movement
-
-        Xkb2Qt<XKB_KEY_Home,                    Qt::Key_Home>,
-        Xkb2Qt<XKB_KEY_End,                     Qt::Key_End>,
-        Xkb2Qt<XKB_KEY_Left,                    Qt::Key_Left>,
-        Xkb2Qt<XKB_KEY_Up,                      Qt::Key_Up>,
-        Xkb2Qt<XKB_KEY_Right,                   Qt::Key_Right>,
-        Xkb2Qt<XKB_KEY_Down,                    Qt::Key_Down>,
-        Xkb2Qt<XKB_KEY_Prior,                   Qt::Key_PageUp>,
-        Xkb2Qt<XKB_KEY_Next,                    Qt::Key_PageDown>,
-
-        // modifiers
-
-        Xkb2Qt<XKB_KEY_Shift_L,                 Qt::Key_Shift>,
-        Xkb2Qt<XKB_KEY_Shift_R,                 Qt::Key_Shift>,
-        Xkb2Qt<XKB_KEY_Shift_Lock,              Qt::Key_Shift>,
-        Xkb2Qt<XKB_KEY_Control_L,               Qt::Key_Control>,
-        Xkb2Qt<XKB_KEY_Control_R,               Qt::Key_Control>,
-        Xkb2Qt<XKB_KEY_Meta_L,                  Qt::Key_Meta>,
-        Xkb2Qt<XKB_KEY_Meta_R,                  Qt::Key_Meta>,
-        Xkb2Qt<XKB_KEY_Alt_L,                   Qt::Key_Alt>,
-        Xkb2Qt<XKB_KEY_Alt_R,                   Qt::Key_Alt>,
-        Xkb2Qt<XKB_KEY_Caps_Lock,               Qt::Key_CapsLock>,
-        Xkb2Qt<XKB_KEY_Num_Lock,                Qt::Key_NumLock>,
-        Xkb2Qt<XKB_KEY_Scroll_Lock,             Qt::Key_ScrollLock>,
-        Xkb2Qt<XKB_KEY_Super_L,                 Qt::Key_Super_L>,
-        Xkb2Qt<XKB_KEY_Super_R,                 Qt::Key_Super_R>,
-        Xkb2Qt<XKB_KEY_Menu,                    Qt::Key_Menu>,
-        Xkb2Qt<XKB_KEY_Hyper_L,                 Qt::Key_Hyper_L>,
-        Xkb2Qt<XKB_KEY_Hyper_R,                 Qt::Key_Hyper_R>,
-        Xkb2Qt<XKB_KEY_Help,                    Qt::Key_Help>,
-        Xkb2Qt<0x1000FF74,                      Qt::Key_Backtab>,        // hardcoded HP backtab
-        Xkb2Qt<0x1005FF10,                      Qt::Key_F11>,            // hardcoded Sun F36 (labeled F11)
-        Xkb2Qt<0x1005FF11,                      Qt::Key_F12>,            // hardcoded Sun F37 (labeled F12)
-
-        // numeric and function keypad keys
-
-        Xkb2Qt<XKB_KEY_KP_Space,                Qt::Key_Space>,
-        Xkb2Qt<XKB_KEY_KP_Tab,                  Qt::Key_Tab>,
-        Xkb2Qt<XKB_KEY_KP_Enter,                Qt::Key_Enter>,
-        //Xkb2Qt<XKB_KEY_KP_F1,                 Qt::Key_F1>,
-        //Xkb2Qt<XKB_KEY_KP_F2,                 Qt::Key_F2>,
-        //Xkb2Qt<XKB_KEY_KP_F3,                 Qt::Key_F3>,
-        //Xkb2Qt<XKB_KEY_KP_F4,                 Qt::Key_F4>,
-        Xkb2Qt<XKB_KEY_KP_Home,                 Qt::Key_Home>,
-        Xkb2Qt<XKB_KEY_KP_Left,                 Qt::Key_Left>,
-        Xkb2Qt<XKB_KEY_KP_Up,                   Qt::Key_Up>,
-        Xkb2Qt<XKB_KEY_KP_Right,                Qt::Key_Right>,
-        Xkb2Qt<XKB_KEY_KP_Down,                 Qt::Key_Down>,
-        Xkb2Qt<XKB_KEY_KP_Prior,                Qt::Key_PageUp>,
-        Xkb2Qt<XKB_KEY_KP_Next,                 Qt::Key_PageDown>,
-        Xkb2Qt<XKB_KEY_KP_End,                  Qt::Key_End>,
-        Xkb2Qt<XKB_KEY_KP_Begin,                Qt::Key_Clear>,
-        Xkb2Qt<XKB_KEY_KP_Insert,               Qt::Key_Insert>,
-        Xkb2Qt<XKB_KEY_KP_Delete,               Qt::Key_Delete>,
-        Xkb2Qt<XKB_KEY_KP_Equal,                Qt::Key_Equal>,
-        Xkb2Qt<XKB_KEY_KP_Multiply,             Qt::Key_Asterisk>,
-        Xkb2Qt<XKB_KEY_KP_Add,                  Qt::Key_Plus>,
-        Xkb2Qt<XKB_KEY_KP_Separator,            Qt::Key_Comma>,
-        Xkb2Qt<XKB_KEY_KP_Subtract,             Qt::Key_Minus>,
-        Xkb2Qt<XKB_KEY_KP_Decimal,              Qt::Key_Period>,
-        Xkb2Qt<XKB_KEY_KP_Divide,               Qt::Key_Slash>,
-
-        // special non-XF86 function keys
-
-        Xkb2Qt<XKB_KEY_Undo,                    Qt::Key_Undo>,
-        Xkb2Qt<XKB_KEY_Redo,                    Qt::Key_Redo>,
-        Xkb2Qt<XKB_KEY_Find,                    Qt::Key_Find>,
-        Xkb2Qt<XKB_KEY_Cancel,                  Qt::Key_Cancel>,
-
-        // International input method support keys
-
-        // International & multi-key character composition
-        Xkb2Qt<XKB_KEY_ISO_Level3_Shift,        Qt::Key_AltGr>,
-        Xkb2Qt<XKB_KEY_Multi_key,               Qt::Key_Multi_key>,
-        Xkb2Qt<XKB_KEY_Codeinput,               Qt::Key_Codeinput>,
-        Xkb2Qt<XKB_KEY_SingleCandidate,         Qt::Key_SingleCandidate>,
-        Xkb2Qt<XKB_KEY_MultipleCandidate,       Qt::Key_MultipleCandidate>,
-        Xkb2Qt<XKB_KEY_PreviousCandidate,       Qt::Key_PreviousCandidate>,
-
-        // Misc Functions
-        Xkb2Qt<XKB_KEY_Mode_switch,             Qt::Key_Mode_switch>,
-        Xkb2Qt<XKB_KEY_script_switch,           Qt::Key_Mode_switch>,
-
-        // Japanese keyboard support
-        Xkb2Qt<XKB_KEY_Kanji,                   Qt::Key_Kanji>,
-        Xkb2Qt<XKB_KEY_Muhenkan,                Qt::Key_Muhenkan>,
-        //Xkb2Qt<XKB_KEY_Henkan_Mode,           Qt::Key_Henkan_Mode>,
-        Xkb2Qt<XKB_KEY_Henkan_Mode,             Qt::Key_Henkan>,
-        Xkb2Qt<XKB_KEY_Henkan,                  Qt::Key_Henkan>,
-        Xkb2Qt<XKB_KEY_Romaji,                  Qt::Key_Romaji>,
-        Xkb2Qt<XKB_KEY_Hiragana,                Qt::Key_Hiragana>,
-        Xkb2Qt<XKB_KEY_Katakana,                Qt::Key_Katakana>,
-        Xkb2Qt<XKB_KEY_Hiragana_Katakana,       Qt::Key_Hiragana_Katakana>,
-        Xkb2Qt<XKB_KEY_Zenkaku,                 Qt::Key_Zenkaku>,
-        Xkb2Qt<XKB_KEY_Hankaku,                 Qt::Key_Hankaku>,
-        Xkb2Qt<XKB_KEY_Zenkaku_Hankaku,         Qt::Key_Zenkaku_Hankaku>,
-        Xkb2Qt<XKB_KEY_Touroku,                 Qt::Key_Touroku>,
-        Xkb2Qt<XKB_KEY_Massyo,                  Qt::Key_Massyo>,
-        Xkb2Qt<XKB_KEY_Kana_Lock,               Qt::Key_Kana_Lock>,
-        Xkb2Qt<XKB_KEY_Kana_Shift,              Qt::Key_Kana_Shift>,
-        Xkb2Qt<XKB_KEY_Eisu_Shift,              Qt::Key_Eisu_Shift>,
-        Xkb2Qt<XKB_KEY_Eisu_toggle,             Qt::Key_Eisu_toggle>,
-        //Xkb2Qt<XKB_KEY_Kanji_Bangou,          Qt::Key_Kanji_Bangou>,
-        //Xkb2Qt<XKB_KEY_Zen_Koho,              Qt::Key_Zen_Koho>,
-        //Xkb2Qt<XKB_KEY_Mae_Koho,              Qt::Key_Mae_Koho>,
-        Xkb2Qt<XKB_KEY_Kanji_Bangou,            Qt::Key_Codeinput>,
-        Xkb2Qt<XKB_KEY_Zen_Koho,                Qt::Key_MultipleCandidate>,
-        Xkb2Qt<XKB_KEY_Mae_Koho,                Qt::Key_PreviousCandidate>,
-
-        // Korean keyboard support
-        Xkb2Qt<XKB_KEY_Hangul,                  Qt::Key_Hangul>,
-        Xkb2Qt<XKB_KEY_Hangul_Start,            Qt::Key_Hangul_Start>,
-        Xkb2Qt<XKB_KEY_Hangul_End,              Qt::Key_Hangul_End>,
-        Xkb2Qt<XKB_KEY_Hangul_Hanja,            Qt::Key_Hangul_Hanja>,
-        Xkb2Qt<XKB_KEY_Hangul_Jamo,             Qt::Key_Hangul_Jamo>,
-        Xkb2Qt<XKB_KEY_Hangul_Romaja,           Qt::Key_Hangul_Romaja>,
-        //Xkb2Qt<XKB_KEY_Hangul_Codeinput,      Qt::Key_Hangul_Codeinput>,
-        Xkb2Qt<XKB_KEY_Hangul_Codeinput,        Qt::Key_Codeinput>,
-        Xkb2Qt<XKB_KEY_Hangul_Jeonja,           Qt::Key_Hangul_Jeonja>,
-        Xkb2Qt<XKB_KEY_Hangul_Banja,            Qt::Key_Hangul_Banja>,
-        Xkb2Qt<XKB_KEY_Hangul_PreHanja,         Qt::Key_Hangul_PreHanja>,
-        Xkb2Qt<XKB_KEY_Hangul_PostHanja,        Qt::Key_Hangul_PostHanja>,
-        //Xkb2Qt<XKB_KEY_Hangul_SingleCandidate,Qt::Key_Hangul_SingleCandidate>,
-        //Xkb2Qt<XKB_KEY_Hangul_MultipleCandidate,Qt::Key_Hangul_MultipleCandidate>,
-        //Xkb2Qt<XKB_KEY_Hangul_PreviousCandidate,Qt::Key_Hangul_PreviousCandidate>,
-        Xkb2Qt<XKB_KEY_Hangul_SingleCandidate,  Qt::Key_SingleCandidate>,
-        Xkb2Qt<XKB_KEY_Hangul_MultipleCandidate,Qt::Key_MultipleCandidate>,
-        Xkb2Qt<XKB_KEY_Hangul_PreviousCandidate,Qt::Key_PreviousCandidate>,
-        Xkb2Qt<XKB_KEY_Hangul_Special,          Qt::Key_Hangul_Special>,
-        //Xkb2Qt<XKB_KEY_Hangul_switch,         Qt::Key_Hangul_switch>,
-        Xkb2Qt<XKB_KEY_Hangul_switch,           Qt::Key_Mode_switch>,
-
-        // dead keys
-        Xkb2Qt<XKB_KEY_dead_grave,              Qt::Key_Dead_Grave>,
-        Xkb2Qt<XKB_KEY_dead_acute,              Qt::Key_Dead_Acute>,
-        Xkb2Qt<XKB_KEY_dead_circumflex,         Qt::Key_Dead_Circumflex>,
-        Xkb2Qt<XKB_KEY_dead_tilde,              Qt::Key_Dead_Tilde>,
-        Xkb2Qt<XKB_KEY_dead_macron,             Qt::Key_Dead_Macron>,
-        Xkb2Qt<XKB_KEY_dead_breve,              Qt::Key_Dead_Breve>,
-        Xkb2Qt<XKB_KEY_dead_abovedot,           Qt::Key_Dead_Abovedot>,
-        Xkb2Qt<XKB_KEY_dead_diaeresis,          Qt::Key_Dead_Diaeresis>,
-        Xkb2Qt<XKB_KEY_dead_abovering,          Qt::Key_Dead_Abovering>,
-        Xkb2Qt<XKB_KEY_dead_doubleacute,        Qt::Key_Dead_Doubleacute>,
-        Xkb2Qt<XKB_KEY_dead_caron,              Qt::Key_Dead_Caron>,
-        Xkb2Qt<XKB_KEY_dead_cedilla,            Qt::Key_Dead_Cedilla>,
-        Xkb2Qt<XKB_KEY_dead_ogonek,             Qt::Key_Dead_Ogonek>,
-        Xkb2Qt<XKB_KEY_dead_iota,               Qt::Key_Dead_Iota>,
-        Xkb2Qt<XKB_KEY_dead_voiced_sound,       Qt::Key_Dead_Voiced_Sound>,
-        Xkb2Qt<XKB_KEY_dead_semivoiced_sound,   Qt::Key_Dead_Semivoiced_Sound>,
-        Xkb2Qt<XKB_KEY_dead_belowdot,           Qt::Key_Dead_Belowdot>,
-        Xkb2Qt<XKB_KEY_dead_hook,               Qt::Key_Dead_Hook>,
-        Xkb2Qt<XKB_KEY_dead_horn,               Qt::Key_Dead_Horn>,
-        Xkb2Qt<XKB_KEY_dead_stroke,             Qt::Key_Dead_Stroke>,
-        Xkb2Qt<XKB_KEY_dead_abovecomma,         Qt::Key_Dead_Abovecomma>,
-        Xkb2Qt<XKB_KEY_dead_abovereversedcomma, Qt::Key_Dead_Abovereversedcomma>,
-        Xkb2Qt<XKB_KEY_dead_doublegrave,        Qt::Key_Dead_Doublegrave>,
-        Xkb2Qt<XKB_KEY_dead_belowring,          Qt::Key_Dead_Belowring>,
-        Xkb2Qt<XKB_KEY_dead_belowmacron,        Qt::Key_Dead_Belowmacron>,
-        Xkb2Qt<XKB_KEY_dead_belowcircumflex,    Qt::Key_Dead_Belowcircumflex>,
-        Xkb2Qt<XKB_KEY_dead_belowtilde,         Qt::Key_Dead_Belowtilde>,
-        Xkb2Qt<XKB_KEY_dead_belowbreve,         Qt::Key_Dead_Belowbreve>,
-        Xkb2Qt<XKB_KEY_dead_belowdiaeresis,     Qt::Key_Dead_Belowdiaeresis>,
-        Xkb2Qt<XKB_KEY_dead_invertedbreve,      Qt::Key_Dead_Invertedbreve>,
-        Xkb2Qt<XKB_KEY_dead_belowcomma,         Qt::Key_Dead_Belowcomma>,
-        Xkb2Qt<XKB_KEY_dead_currency,           Qt::Key_Dead_Currency>,
-        Xkb2Qt<XKB_KEY_dead_a,                  Qt::Key_Dead_a>,
-        Xkb2Qt<XKB_KEY_dead_A,                  Qt::Key_Dead_A>,
-        Xkb2Qt<XKB_KEY_dead_e,                  Qt::Key_Dead_e>,
-        Xkb2Qt<XKB_KEY_dead_E,                  Qt::Key_Dead_E>,
-        Xkb2Qt<XKB_KEY_dead_i,                  Qt::Key_Dead_i>,
-        Xkb2Qt<XKB_KEY_dead_I,                  Qt::Key_Dead_I>,
-        Xkb2Qt<XKB_KEY_dead_o,                  Qt::Key_Dead_o>,
-        Xkb2Qt<XKB_KEY_dead_O,                  Qt::Key_Dead_O>,
-        Xkb2Qt<XKB_KEY_dead_u,                  Qt::Key_Dead_u>,
-        Xkb2Qt<XKB_KEY_dead_U,                  Qt::Key_Dead_U>,
-        Xkb2Qt<XKB_KEY_dead_small_schwa,        Qt::Key_Dead_Small_Schwa>,
-        Xkb2Qt<XKB_KEY_dead_capital_schwa,      Qt::Key_Dead_Capital_Schwa>,
-        Xkb2Qt<XKB_KEY_dead_greek,              Qt::Key_Dead_Greek>,
-        Xkb2Qt<XKB_KEY_dead_lowline,            Qt::Key_Dead_Lowline>,
-        Xkb2Qt<XKB_KEY_dead_aboveverticalline,  Qt::Key_Dead_Aboveverticalline>,
-        Xkb2Qt<XKB_KEY_dead_belowverticalline,  Qt::Key_Dead_Belowverticalline>,
-        Xkb2Qt<XKB_KEY_dead_longsolidusoverlay, Qt::Key_Dead_Longsolidusoverlay>,
-
-        // Special keys from X.org - This include multimedia keys,
-        // wireless/bluetooth/uwb keys, special launcher keys, etc.
-        Xkb2Qt<XKB_KEY_XF86Back,                Qt::Key_Back>,
-        Xkb2Qt<XKB_KEY_XF86Forward,             Qt::Key_Forward>,
-        Xkb2Qt<XKB_KEY_XF86Stop,                Qt::Key_Stop>,
-        Xkb2Qt<XKB_KEY_XF86Refresh,             Qt::Key_Refresh>,
-        Xkb2Qt<XKB_KEY_XF86Favorites,           Qt::Key_Favorites>,
-        Xkb2Qt<XKB_KEY_XF86AudioMedia,          Qt::Key_LaunchMedia>,
-        Xkb2Qt<XKB_KEY_XF86OpenURL,             Qt::Key_OpenUrl>,
-        Xkb2Qt<XKB_KEY_XF86HomePage,            Qt::Key_HomePage>,
-        Xkb2Qt<XKB_KEY_XF86Search,              Qt::Key_Search>,
-        Xkb2Qt<XKB_KEY_XF86AudioLowerVolume,    Qt::Key_VolumeDown>,
-        Xkb2Qt<XKB_KEY_XF86AudioMute,           Qt::Key_VolumeMute>,
-        Xkb2Qt<XKB_KEY_XF86AudioRaiseVolume,    Qt::Key_VolumeUp>,
-        Xkb2Qt<XKB_KEY_XF86AudioPlay,           Qt::Key_MediaPlay>,
-        Xkb2Qt<XKB_KEY_XF86AudioStop,           Qt::Key_MediaStop>,
-        Xkb2Qt<XKB_KEY_XF86AudioPrev,           Qt::Key_MediaPrevious>,
-        Xkb2Qt<XKB_KEY_XF86AudioNext,           Qt::Key_MediaNext>,
-        Xkb2Qt<XKB_KEY_XF86AudioRecord,         Qt::Key_MediaRecord>,
-        Xkb2Qt<XKB_KEY_XF86AudioPause,          Qt::Key_MediaPause>,
-        Xkb2Qt<XKB_KEY_XF86Mail,                Qt::Key_LaunchMail>,
-        Xkb2Qt<XKB_KEY_XF86MyComputer,          Qt::Key_Launch0>,  // ### Qt 6: remap properly
-        Xkb2Qt<XKB_KEY_XF86Calculator,          Qt::Key_Launch1>,
-        Xkb2Qt<XKB_KEY_XF86Memo,                Qt::Key_Memo>,
-        Xkb2Qt<XKB_KEY_XF86ToDoList,            Qt::Key_ToDoList>,
-        Xkb2Qt<XKB_KEY_XF86Calendar,            Qt::Key_Calendar>,
-        Xkb2Qt<XKB_KEY_XF86PowerDown,           Qt::Key_PowerDown>,
-        Xkb2Qt<XKB_KEY_XF86ContrastAdjust,      Qt::Key_ContrastAdjust>,
-        Xkb2Qt<XKB_KEY_XF86Standby,             Qt::Key_Standby>,
-        Xkb2Qt<XKB_KEY_XF86MonBrightnessUp,     Qt::Key_MonBrightnessUp>,
-        Xkb2Qt<XKB_KEY_XF86MonBrightnessDown,   Qt::Key_MonBrightnessDown>,
-        Xkb2Qt<XKB_KEY_XF86KbdLightOnOff,       Qt::Key_KeyboardLightOnOff>,
-        Xkb2Qt<XKB_KEY_XF86KbdBrightnessUp,     Qt::Key_KeyboardBrightnessUp>,
-        Xkb2Qt<XKB_KEY_XF86KbdBrightnessDown,   Qt::Key_KeyboardBrightnessDown>,
-        Xkb2Qt<XKB_KEY_XF86PowerOff,            Qt::Key_PowerOff>,
-        Xkb2Qt<XKB_KEY_XF86WakeUp,              Qt::Key_WakeUp>,
-        Xkb2Qt<XKB_KEY_XF86Eject,               Qt::Key_Eject>,
-        Xkb2Qt<XKB_KEY_XF86ScreenSaver,         Qt::Key_ScreenSaver>,
-        Xkb2Qt<XKB_KEY_XF86WWW,                 Qt::Key_WWW>,
-        Xkb2Qt<XKB_KEY_XF86Sleep,               Qt::Key_Sleep>,
-        Xkb2Qt<XKB_KEY_XF86LightBulb,           Qt::Key_LightBulb>,
-        Xkb2Qt<XKB_KEY_XF86Shop,                Qt::Key_Shop>,
-        Xkb2Qt<XKB_KEY_XF86History,             Qt::Key_History>,
-        Xkb2Qt<XKB_KEY_XF86AddFavorite,         Qt::Key_AddFavorite>,
-        Xkb2Qt<XKB_KEY_XF86HotLinks,            Qt::Key_HotLinks>,
-        Xkb2Qt<XKB_KEY_XF86BrightnessAdjust,    Qt::Key_BrightnessAdjust>,
-        Xkb2Qt<XKB_KEY_XF86Finance,             Qt::Key_Finance>,
-        Xkb2Qt<XKB_KEY_XF86Community,           Qt::Key_Community>,
-        Xkb2Qt<XKB_KEY_XF86AudioRewind,         Qt::Key_AudioRewind>,
-        Xkb2Qt<XKB_KEY_XF86BackForward,         Qt::Key_BackForward>,
-        Xkb2Qt<XKB_KEY_XF86ApplicationLeft,     Qt::Key_ApplicationLeft>,
-        Xkb2Qt<XKB_KEY_XF86ApplicationRight,    Qt::Key_ApplicationRight>,
-        Xkb2Qt<XKB_KEY_XF86Book,                Qt::Key_Book>,
-        Xkb2Qt<XKB_KEY_XF86CD,                  Qt::Key_CD>,
-        Xkb2Qt<XKB_KEY_XF86Calculater,          Qt::Key_Calculator>,
-        Xkb2Qt<XKB_KEY_XF86Clear,               Qt::Key_Clear>,
-        Xkb2Qt<XKB_KEY_XF86ClearGrab,           Qt::Key_ClearGrab>,
-        Xkb2Qt<XKB_KEY_XF86Close,               Qt::Key_Close>,
-        Xkb2Qt<XKB_KEY_XF86Copy,                Qt::Key_Copy>,
-        Xkb2Qt<XKB_KEY_XF86Cut,                 Qt::Key_Cut>,
-        Xkb2Qt<XKB_KEY_XF86Display,             Qt::Key_Display>,
-        Xkb2Qt<XKB_KEY_XF86DOS,                 Qt::Key_DOS>,
-        Xkb2Qt<XKB_KEY_XF86Documents,           Qt::Key_Documents>,
-        Xkb2Qt<XKB_KEY_XF86Excel,               Qt::Key_Excel>,
-        Xkb2Qt<XKB_KEY_XF86Explorer,            Qt::Key_Explorer>,
-        Xkb2Qt<XKB_KEY_XF86Game,                Qt::Key_Game>,
-        Xkb2Qt<XKB_KEY_XF86Go,                  Qt::Key_Go>,
-        Xkb2Qt<XKB_KEY_XF86iTouch,              Qt::Key_iTouch>,
-        Xkb2Qt<XKB_KEY_XF86LogOff,              Qt::Key_LogOff>,
-        Xkb2Qt<XKB_KEY_XF86Market,              Qt::Key_Market>,
-        Xkb2Qt<XKB_KEY_XF86Meeting,             Qt::Key_Meeting>,
-        Xkb2Qt<XKB_KEY_XF86MenuKB,              Qt::Key_MenuKB>,
-        Xkb2Qt<XKB_KEY_XF86MenuPB,              Qt::Key_MenuPB>,
-        Xkb2Qt<XKB_KEY_XF86MySites,             Qt::Key_MySites>,
-        Xkb2Qt<XKB_KEY_XF86New,                 Qt::Key_New>,
-        Xkb2Qt<XKB_KEY_XF86News,                Qt::Key_News>,
-        Xkb2Qt<XKB_KEY_XF86OfficeHome,          Qt::Key_OfficeHome>,
-        Xkb2Qt<XKB_KEY_XF86Open,                Qt::Key_Open>,
-        Xkb2Qt<XKB_KEY_XF86Option,              Qt::Key_Option>,
-        Xkb2Qt<XKB_KEY_XF86Paste,               Qt::Key_Paste>,
-        Xkb2Qt<XKB_KEY_XF86Phone,               Qt::Key_Phone>,
-        Xkb2Qt<XKB_KEY_XF86Reply,               Qt::Key_Reply>,
-        Xkb2Qt<XKB_KEY_XF86Reload,              Qt::Key_Reload>,
-        Xkb2Qt<XKB_KEY_XF86RotateWindows,       Qt::Key_RotateWindows>,
-        Xkb2Qt<XKB_KEY_XF86RotationPB,          Qt::Key_RotationPB>,
-        Xkb2Qt<XKB_KEY_XF86RotationKB,          Qt::Key_RotationKB>,
-        Xkb2Qt<XKB_KEY_XF86Save,                Qt::Key_Save>,
-        Xkb2Qt<XKB_KEY_XF86Send,                Qt::Key_Send>,
-        Xkb2Qt<XKB_KEY_XF86Spell,               Qt::Key_Spell>,
-        Xkb2Qt<XKB_KEY_XF86SplitScreen,         Qt::Key_SplitScreen>,
-        Xkb2Qt<XKB_KEY_XF86Support,             Qt::Key_Support>,
-        Xkb2Qt<XKB_KEY_XF86TaskPane,            Qt::Key_TaskPane>,
-        Xkb2Qt<XKB_KEY_XF86Terminal,            Qt::Key_Terminal>,
-        Xkb2Qt<XKB_KEY_XF86Tools,               Qt::Key_Tools>,
-        Xkb2Qt<XKB_KEY_XF86Travel,              Qt::Key_Travel>,
-        Xkb2Qt<XKB_KEY_XF86Video,               Qt::Key_Video>,
-        Xkb2Qt<XKB_KEY_XF86Word,                Qt::Key_Word>,
-        Xkb2Qt<XKB_KEY_XF86Xfer,                Qt::Key_Xfer>,
-        Xkb2Qt<XKB_KEY_XF86ZoomIn,              Qt::Key_ZoomIn>,
-        Xkb2Qt<XKB_KEY_XF86ZoomOut,             Qt::Key_ZoomOut>,
-        Xkb2Qt<XKB_KEY_XF86Away,                Qt::Key_Away>,
-        Xkb2Qt<XKB_KEY_XF86Messenger,           Qt::Key_Messenger>,
-        Xkb2Qt<XKB_KEY_XF86WebCam,              Qt::Key_WebCam>,
-        Xkb2Qt<XKB_KEY_XF86MailForward,         Qt::Key_MailForward>,
-        Xkb2Qt<XKB_KEY_XF86Pictures,            Qt::Key_Pictures>,
-        Xkb2Qt<XKB_KEY_XF86Music,               Qt::Key_Music>,
-        Xkb2Qt<XKB_KEY_XF86Battery,             Qt::Key_Battery>,
-        Xkb2Qt<XKB_KEY_XF86Bluetooth,           Qt::Key_Bluetooth>,
-        Xkb2Qt<XKB_KEY_XF86WLAN,                Qt::Key_WLAN>,
-        Xkb2Qt<XKB_KEY_XF86UWB,                 Qt::Key_UWB>,
-        Xkb2Qt<XKB_KEY_XF86AudioForward,        Qt::Key_AudioForward>,
-        Xkb2Qt<XKB_KEY_XF86AudioRepeat,         Qt::Key_AudioRepeat>,
-        Xkb2Qt<XKB_KEY_XF86AudioRandomPlay,     Qt::Key_AudioRandomPlay>,
-        Xkb2Qt<XKB_KEY_XF86Subtitle,            Qt::Key_Subtitle>,
-        Xkb2Qt<XKB_KEY_XF86AudioCycleTrack,     Qt::Key_AudioCycleTrack>,
-        Xkb2Qt<XKB_KEY_XF86Time,                Qt::Key_Time>,
-        Xkb2Qt<XKB_KEY_XF86Select,              Qt::Key_Select>,
-        Xkb2Qt<XKB_KEY_XF86View,                Qt::Key_View>,
-        Xkb2Qt<XKB_KEY_XF86TopMenu,             Qt::Key_TopMenu>,
-        Xkb2Qt<XKB_KEY_XF86Red,                 Qt::Key_Red>,
-        Xkb2Qt<XKB_KEY_XF86Green,               Qt::Key_Green>,
-        Xkb2Qt<XKB_KEY_XF86Yellow,              Qt::Key_Yellow>,
-        Xkb2Qt<XKB_KEY_XF86Blue,                Qt::Key_Blue>,
-        Xkb2Qt<XKB_KEY_XF86Bluetooth,           Qt::Key_Bluetooth>,
-        Xkb2Qt<XKB_KEY_XF86Suspend,             Qt::Key_Suspend>,
-        Xkb2Qt<XKB_KEY_XF86Hibernate,           Qt::Key_Hibernate>,
-        Xkb2Qt<XKB_KEY_XF86TouchpadToggle,      Qt::Key_TouchpadToggle>,
-        Xkb2Qt<XKB_KEY_XF86TouchpadOn,          Qt::Key_TouchpadOn>,
-        Xkb2Qt<XKB_KEY_XF86TouchpadOff,         Qt::Key_TouchpadOff>,
-        Xkb2Qt<XKB_KEY_XF86AudioMicMute,        Qt::Key_MicMute>,
-        Xkb2Qt<XKB_KEY_XF86Launch0,             Qt::Key_Launch2>, // ### Qt 6: remap properly
-        Xkb2Qt<XKB_KEY_XF86Launch1,             Qt::Key_Launch3>,
-        Xkb2Qt<XKB_KEY_XF86Launch2,             Qt::Key_Launch4>,
-        Xkb2Qt<XKB_KEY_XF86Launch3,             Qt::Key_Launch5>,
-        Xkb2Qt<XKB_KEY_XF86Launch4,             Qt::Key_Launch6>,
-        Xkb2Qt<XKB_KEY_XF86Launch5,             Qt::Key_Launch7>,
-        Xkb2Qt<XKB_KEY_XF86Launch6,             Qt::Key_Launch8>,
-        Xkb2Qt<XKB_KEY_XF86Launch7,             Qt::Key_Launch9>,
-        Xkb2Qt<XKB_KEY_XF86Launch8,             Qt::Key_LaunchA>,
-        Xkb2Qt<XKB_KEY_XF86Launch9,             Qt::Key_LaunchB>,
-        Xkb2Qt<XKB_KEY_XF86LaunchA,             Qt::Key_LaunchC>,
-        Xkb2Qt<XKB_KEY_XF86LaunchB,             Qt::Key_LaunchD>,
-        Xkb2Qt<XKB_KEY_XF86LaunchC,             Qt::Key_LaunchE>,
-        Xkb2Qt<XKB_KEY_XF86LaunchD,             Qt::Key_LaunchF>,
-        Xkb2Qt<XKB_KEY_XF86LaunchE,             Qt::Key_LaunchG>,
-        Xkb2Qt<XKB_KEY_XF86LaunchF,             Qt::Key_LaunchH>
-    >::Data{}
-);
-
-// Possible modifier states.
-static const Qt::KeyboardModifiers ModsTbl[] = {
-    Qt::NoModifier,                                             // 0
-    Qt::ShiftModifier,                                          // 1
-    Qt::ControlModifier,                                        // 2
-    Qt::ControlModifier | Qt::ShiftModifier,                    // 3
-    Qt::AltModifier,                                            // 4
-    Qt::AltModifier | Qt::ShiftModifier,                        // 5
-    Qt::AltModifier | Qt::ControlModifier,                      // 6
-    Qt::AltModifier | Qt::ShiftModifier | Qt::ControlModifier,  // 7
-    Qt::NoModifier                                              // Fall-back to raw Key_*, for non-latin1 kb layouts
-};
+QT_BEGIN_NAMESPACE
 
 Qt::KeyboardModifiers QXcbKeyboard::translateModifiers(int s) const
 {
-    Qt::KeyboardModifiers ret = 0;
+    Qt::KeyboardModifiers ret = Qt::NoModifier;
     if (s & XCB_MOD_MASK_SHIFT)
         ret |= Qt::ShiftModifier;
     if (s & XCB_MOD_MASK_CONTROL)
@@ -473,7 +88,7 @@ static xcb_keysym_t getUnshiftedXKey(xcb_keysym_t unshifted, xcb_keysym_t shifte
 
     xcb_keysym_t xlower;
     xcb_keysym_t xupper;
-    xkbcommon_XConvertCase(unshifted, &xlower, &xupper);
+    QXkbCommon::xkbcommon_XConvertCase(unshifted, &xlower, &xupper);
 
     if (xlower != xupper          // Check if symbol is cased
         && unshifted == xupper) { // Unshifted must be upper case
@@ -805,7 +420,12 @@ void QXcbKeyboard::updateKeymap()
 
     updateXKBMods();
 
-    checkForLatinLayout();
+    QXkbCommon::verifyHasLatinLayout(m_xkbKeymap.get());
+}
+
+QList<int> QXcbKeyboard::possibleKeys(const QKeyEvent *event) const
+{
+    return QXkbCommon::possibleKeys(m_xkbState.get(), event, m_superAsMeta, m_hyperAsMeta);
 }
 
 #if QT_CONFIG(xkb)
@@ -918,272 +538,6 @@ void QXcbKeyboard::updateXKBMods()
     xkb_mods.mod5 = xkb_keymap_mod_get_index(m_xkbKeymap.get(), "Mod5");
 }
 
-static bool isLatin(xkb_keysym_t sym)
-{
-    return ((sym >= 'a' && sym <= 'z') || (sym >= 'A' && sym <= 'Z'));
-}
-
-void QXcbKeyboard::checkForLatinLayout() const
-{
-    const xkb_layout_index_t layoutCount = xkb_keymap_num_layouts(m_xkbKeymap.get());
-    const xcb_keycode_t minKeycode = xkb_keymap_min_keycode(m_xkbKeymap.get());
-    const xcb_keycode_t maxKeycode = xkb_keymap_max_keycode(m_xkbKeymap.get());
-
-    const xkb_keysym_t *keysyms = nullptr;
-    int nrLatinKeys = 0;
-    for (xkb_layout_index_t layout = 0; layout < layoutCount; ++layout) {
-        for (xcb_keycode_t code = minKeycode; code < maxKeycode; ++code) {
-            xkb_keymap_key_get_syms_by_level(m_xkbKeymap.get(), code, layout, 0, &keysyms);
-            if (keysyms && isLatin(keysyms[0]))
-                nrLatinKeys++;
-            if (nrLatinKeys > 10) // arbitrarily chosen threshold
-                return;
-        }
-    }
-    // This means that lookupLatinKeysym() will not find anything and latin
-    // key shortcuts might not work. This is a bug in the affected desktop
-    // environment. Usually can be solved via system settings by adding e.g. 'us'
-    // layout to the list of seleced layouts, or by using command line, "setxkbmap
-    // -layout rus,en". The position of latin key based layout in the list of the
-    // selected layouts is irrelevant. Properly functioning desktop environments
-    // handle this behind the scenes, even if no latin key based layout has been
-    // explicitly listed in the selected layouts.
-    qCWarning(lcQpaKeyboard, "no keyboard layouts with latin keys present");
-}
-
-xkb_keysym_t QXcbKeyboard::lookupLatinKeysym(xkb_keycode_t keycode) const
-{
-    xkb_layout_index_t layout;
-    xkb_keysym_t sym = XKB_KEY_NoSymbol;
-    const xkb_layout_index_t layoutCount = xkb_keymap_num_layouts_for_key(m_xkbKeymap.get(), keycode);
-    const xkb_layout_index_t currentLayout = xkb_state_key_get_layout(m_xkbState.get(), keycode);
-    // Look at user layouts in the order in which they are defined in system
-    // settings to find a latin keysym.
-    for (layout = 0; layout < layoutCount; ++layout) {
-        if (layout == currentLayout)
-            continue;
-        const xkb_keysym_t *syms;
-        xkb_level_index_t level = xkb_state_key_get_level(m_xkbState.get(), keycode, layout);
-        if (xkb_keymap_key_get_syms_by_level(m_xkbKeymap.get(), keycode, layout, level, &syms) != 1)
-            continue;
-        if (isLatin(syms[0])) {
-            sym = syms[0];
-            break;
-        }
-    }
-
-    if (sym == XKB_KEY_NoSymbol)
-        return sym;
-
-    xkb_mod_mask_t latchedMods = xkb_state_serialize_mods(m_xkbState.get(), XKB_STATE_MODS_LATCHED);
-    xkb_mod_mask_t lockedMods = xkb_state_serialize_mods(m_xkbState.get(), XKB_STATE_MODS_LOCKED);
-
-    // Check for uniqueness, consider the following setup:
-    // setxkbmap -layout us,ru,us -variant dvorak,, -option 'grp:ctrl_alt_toggle' (set 'ru' as active).
-    // In this setup, the user would expect to trigger a ctrl+q shortcut by pressing ctrl+<physical x key>,
-    // because "US dvorak" is higher up in the layout settings list. This check verifies that an obtained
-    // 'sym' can not be acquired by any other layout higher up in the user's layout list. If it can be acquired
-    // then the obtained key is not unique. This prevents ctrl+<physical q key> from generating a ctrl+q
-    // shortcut in the above described setup. We don't want ctrl+<physical x key> and ctrl+<physical q key> to
-    // generate the same shortcut event in this case.
-    const xcb_keycode_t minKeycode = xkb_keymap_min_keycode(m_xkbKeymap.get());
-    const xcb_keycode_t maxKeycode = xkb_keymap_max_keycode(m_xkbKeymap.get());
-    ScopedXKBState state(xkb_state_new(m_xkbKeymap.get()));
-    for (xkb_layout_index_t prevLayout = 0; prevLayout < layout; ++prevLayout) {
-        xkb_state_update_mask(state.get(), 0, latchedMods, lockedMods, 0, 0, prevLayout);
-        for (xcb_keycode_t code = minKeycode; code < maxKeycode; ++code) {
-            xkb_keysym_t prevSym = xkb_state_key_get_one_sym(state.get(), code);
-            if (prevSym == sym) {
-                sym = XKB_KEY_NoSymbol;
-                break;
-            }
-        }
-    }
-
-    return sym;
-}
-
-static const char *qtKeyName(int qtKey)
-{
-    int keyEnumIndex = qt_getQtMetaObject()->indexOfEnumerator("Key");
-    QMetaEnum keyEnum = qt_getQtMetaObject()->enumerator(keyEnumIndex);
-    return keyEnum.valueToKey(qtKey);
-}
-
-QList<int> QXcbKeyboard::possibleKeys(const QKeyEvent *event) const
-{
-    // turn off the modifier bits which doesn't participate in shortcuts
-    Qt::KeyboardModifiers notNeeded = Qt::KeypadModifier | Qt::GroupSwitchModifier;
-    Qt::KeyboardModifiers modifiers = event->modifiers() &= ~notNeeded;
-    // create a fresh kb state and test against the relevant modifier combinations
-    struct xkb_state *kb_state = xkb_state_new(m_xkbKeymap.get());
-    if (!kb_state) {
-        qWarning("QXcbKeyboard: failed to compile xkb keymap!");
-        return QList<int>();
-    }
-    // get kb state from the master xkb_state and update the temporary kb_state
-    xkb_layout_index_t lockedLayout = xkb_state_serialize_layout(m_xkbState.get(), XKB_STATE_LAYOUT_LOCKED);
-    xkb_mod_mask_t latchedMods = xkb_state_serialize_mods(m_xkbState.get(), XKB_STATE_MODS_LATCHED);
-    xkb_mod_mask_t lockedMods = xkb_state_serialize_mods(m_xkbState.get(), XKB_STATE_MODS_LOCKED);
-    xkb_mod_mask_t depressedMods = xkb_state_serialize_mods(m_xkbState.get(), XKB_STATE_MODS_DEPRESSED);
-
-    xkb_state_update_mask(kb_state, depressedMods, latchedMods, lockedMods, 0, 0, lockedLayout);
-    quint32 keycode = event->nativeScanCode();
-    // handle shortcuts for level three and above
-    xkb_layout_index_t layoutIndex = xkb_state_key_get_layout(kb_state, keycode);
-    xkb_level_index_t levelIndex = 0;
-    if (layoutIndex != XKB_LAYOUT_INVALID) {
-        levelIndex = xkb_state_key_get_level(kb_state, keycode, layoutIndex);
-        if (levelIndex == XKB_LEVEL_INVALID)
-            levelIndex = 0;
-    }
-    if (levelIndex <= 1)
-        xkb_state_update_mask(kb_state, 0, latchedMods, lockedMods, 0, 0, lockedLayout);
-
-    xkb_keysym_t sym = xkb_state_key_get_one_sym(kb_state, keycode);
-    if (sym == XKB_KEY_NoSymbol) {
-        xkb_state_unref(kb_state);
-        return QList<int>();
-    }
-
-    QList<int> result;
-    int baseQtKey = keysymToQtKey(sym, modifiers, kb_state, keycode);
-    if (baseQtKey)
-        result += (baseQtKey + modifiers);
-
-    xkb_mod_index_t shiftMod = xkb_keymap_mod_get_index(m_xkbKeymap.get(), "Shift");
-    xkb_mod_index_t altMod = xkb_keymap_mod_get_index(m_xkbKeymap.get(), "Alt");
-    xkb_mod_index_t controlMod = xkb_keymap_mod_get_index(m_xkbKeymap.get(), "Control");
-    xkb_mod_index_t metaMod = xkb_keymap_mod_get_index(m_xkbKeymap.get(), "Meta");
-
-    Q_ASSERT(shiftMod < 32);
-    Q_ASSERT(altMod < 32);
-    Q_ASSERT(controlMod < 32);
-
-    xkb_mod_mask_t depressed;
-    int qtKey = 0;
-    // obtain a list of possible shortcuts for the given key event
-    for (uint i = 1; i < sizeof(ModsTbl) / sizeof(*ModsTbl) ; ++i) {
-        Qt::KeyboardModifiers neededMods = ModsTbl[i];
-        if ((modifiers & neededMods) == neededMods) {
-            if (i == 8) {
-                if (isLatin(baseQtKey))
-                    continue;
-                // add a latin key as a fall back key
-                sym = lookupLatinKeysym(keycode);
-            } else {
-                depressed = 0;
-                if (neededMods & Qt::AltModifier)
-                    depressed |= (1 << altMod);
-                if (neededMods & Qt::ShiftModifier)
-                    depressed |= (1 << shiftMod);
-                if (neededMods & Qt::ControlModifier)
-                    depressed |= (1 << controlMod);
-                if (metaMod < 32 && neededMods & Qt::MetaModifier)
-                    depressed |= (1 << metaMod);
-                xkb_state_update_mask(kb_state, depressed, latchedMods, lockedMods, 0, 0, lockedLayout);
-                sym = xkb_state_key_get_one_sym(kb_state, keycode);
-            }
-            if (sym == XKB_KEY_NoSymbol)
-                continue;
-
-            Qt::KeyboardModifiers mods = modifiers & ~neededMods;
-            qtKey = keysymToQtKey(sym, mods, kb_state, keycode);
-            if (!qtKey || qtKey == baseQtKey)
-                continue;
-
-            // catch only more specific shortcuts, i.e. Ctrl+Shift+= also generates Ctrl++ and +,
-            // but Ctrl++ is more specific than +, so we should skip the last one
-            bool ambiguous = false;
-            for (int shortcut : qAsConst(result)) {
-                if (int(shortcut & ~Qt::KeyboardModifierMask) == qtKey && (shortcut & mods) == mods) {
-                    ambiguous = true;
-                    break;
-                }
-            }
-            if (ambiguous)
-                continue;
-
-            result += (qtKey + mods);
-        }
-    }
-    xkb_state_unref(kb_state);
-    return result;
-}
-
-int QXcbKeyboard::keysymToQtKey(xcb_keysym_t keysym, Qt::KeyboardModifiers modifiers,
-                                struct xkb_state *state, xcb_keycode_t code) const
-{
-    int qtKey = 0;
-
-    // lookup from direct mapping
-    if (keysym >= XKB_KEY_F1 && keysym <= XKB_KEY_F35) {
-        // function keys
-        qtKey = Qt::Key_F1 + (keysym - XKB_KEY_F1);
-    } else if (keysym >= XKB_KEY_KP_0 && keysym <= XKB_KEY_KP_9) {
-        // numeric keypad keys
-        qtKey = Qt::Key_0 + (keysym - XKB_KEY_KP_0);
-    } else if (isLatin(keysym)) {
-        qtKey = xkbcommon_xkb_keysym_to_upper(keysym);
-    } else {
-        // check if we have a direct mapping
-        xkb2qt_t searchKey{keysym, 0};
-        auto it = std::lower_bound(KeyTbl.cbegin(), KeyTbl.cend(), searchKey);
-        if (it != KeyTbl.end() && !(searchKey < *it))
-            qtKey = it->qt;
-    }
-
-    QString text;
-    bool fromUnicode = qtKey == 0;
-    if (fromUnicode) { // lookup from unicode
-        if (modifiers & Qt::ControlModifier) {
-            // Control modifier changes the text to ASCII control character, therefore we
-            // can't use this text to map keysym to a qt key. We can use the same keysym
-            // (it is not affectd by transformation) to obtain untransformed text. For details
-            // see "Appendix A. Default Symbol Transformations" in the XKB specification.
-            text = lookupStringNoKeysymTransformations(keysym);
-        } else {
-            text = lookupString(state, code);
-        }
-        if (!text.isEmpty()) {
-             if (text.unicode()->isDigit()) {
-                 // Ensures that also non-latin digits are mapped to corresponding qt keys,
-                 // e.g CTRL + ۲ (arabic two), is mapped to CTRL + Qt::Key_2.
-                 qtKey = Qt::Key_0 + text.unicode()->digitValue();
-             } else {
-                 qtKey = text.unicode()->toUpper().unicode();
-             }
-        }
-    }
-
-    if (rmod_masks.meta) {
-        // translate Super/Hyper keys to Meta if we're using them as the MetaModifier
-        if (rmod_masks.meta == rmod_masks.super && (qtKey == Qt::Key_Super_L
-                                                 || qtKey == Qt::Key_Super_R)) {
-            qtKey = Qt::Key_Meta;
-        } else if (rmod_masks.meta == rmod_masks.hyper && (qtKey == Qt::Key_Hyper_L
-                                                        || qtKey == Qt::Key_Hyper_R)) {
-            qtKey = Qt::Key_Meta;
-        }
-    }
-
-    if (Q_UNLIKELY(lcQpaKeyboard().isDebugEnabled())) {
-        char keysymName[64];
-        xkb_keysym_get_name(keysym, keysymName, sizeof(keysymName));
-        QString keysymInHex = QString(QStringLiteral("0x%1")).arg(keysym, 0, 16);
-        if (qtKeyName(qtKey)) {
-            qCDebug(lcQpaKeyboard).nospace() << "keysym: " << keysymName << "("
-                << keysymInHex << ") mapped to Qt::" << qtKeyName(qtKey) << " | text: " << text
-                << " | qt key: " << qtKey << " mapped from unicode number: " << fromUnicode;
-        } else {
-            qCDebug(lcQpaKeyboard).nospace() << "no Qt::Key for keysym: " << keysymName
-                << "(" << keysymInHex << ") | text: " << text << " | qt key: " << qtKey;
-        }
-    }
-
-    return qtKey;
-}
-
 QXcbKeyboard::QXcbKeyboard(QXcbConnection *connection)
     : QXcbObject(connection)
 {
@@ -1514,6 +868,12 @@ void QXcbKeyboard::resolveMaskConflicts()
             rmod_masks.meta = rmod_masks.hyper;
         }
     }
+
+    // translate Super/Hyper keys to Meta if we're using them as the MetaModifier
+    if (rmod_masks.meta && rmod_masks.meta == rmod_masks.super)
+        m_superAsMeta = true;
+    if (rmod_masks.meta && rmod_masks.meta == rmod_masks.hyper)
+        m_hyperAsMeta = true;
 }
 
 void QXcbKeyboard::handleKeyEvent(xcb_window_t sourceWindow, QEvent::Type type, xcb_keycode_t code,
@@ -1529,7 +889,7 @@ void QXcbKeyboard::handleKeyEvent(xcb_window_t sourceWindow, QEvent::Type type,
     if (type == QEvent::KeyPress)
         targetWindow->updateNetWmUserTime(time);
 
-    ScopedXKBState sendEventState;
+    QXkbCommon::ScopedXKBState sendEventState;
     if (fromSendEvent) {
         // Have a temporary keyboard state filled in from state
         // this way we allow for synthetic events to have different state
@@ -1546,30 +906,13 @@ void QXcbKeyboard::handleKeyEvent(xcb_window_t sourceWindow, QEvent::Type type,
     struct xkb_state *xkbState = fromSendEvent ? sendEventState.get() : m_xkbState.get();
 
     xcb_keysym_t sym = xkb_state_key_get_one_sym(xkbState, code);
-    QString text = lookupString(xkbState, code);
+    QString text = QXkbCommon::lookupString(xkbState, code);
 
     Qt::KeyboardModifiers modifiers = translateModifiers(state);
-    if (sym >= XKB_KEY_KP_Space && sym <= XKB_KEY_KP_9)
+    if (QXkbCommon::isKeypad(sym))
         modifiers |= Qt::KeypadModifier;
 
-    // Note 1: All standard key sequences on linux (as defined in platform theme)
-    // that use a latin character also contain a control modifier, which is why
-    // checking for Qt::ControlModifier is sufficient here. It is possible to
-    // override QPlatformTheme::keyBindings() and provide custom sequences for
-    // QKeySequence::StandardKey. Custom sequences probably should respect this
-    // convention (alternatively, we could test against other modifiers here).
-    // Note 2: The possibleKeys() shorcut mechanism is not affected by this value
-    // adjustment and does its own thing.
-    xcb_keysym_t latinKeysym = XKB_KEY_NoSymbol;
-    if (modifiers & Qt::ControlModifier) {
-        // With standard shortcuts we should prefer a latin character, this is
-        // in checks like "event == QKeySequence::Copy".
-        if (!isLatin(sym))
-            latinKeysym = lookupLatinKeysym(code);
-    }
-
-    int qtcode = keysymToQtKey(latinKeysym != XKB_KEY_NoSymbol ? latinKeysym : sym,
-                               modifiers, xkbState, code);
+    int qtcode = QXkbCommon::keysymToQtKey(sym, modifiers, xkbState, code, m_superAsMeta, m_hyperAsMeta);
 
     if (type == QEvent::KeyPress) {
         if (m_isAutoRepeat && m_autoRepeatCode != code)
@@ -1611,28 +954,6 @@ void QXcbKeyboard::handleKeyEvent(xcb_window_t sourceWindow, QEvent::Type type,
     }
 }
 
-QString QXcbKeyboard::lookupString(struct xkb_state *state, xcb_keycode_t code) const
-{
-    QVarLengthArray<char, 32> chars(32);
-    const int size = xkb_state_key_get_utf8(state, code, chars.data(), chars.size());
-    if (Q_UNLIKELY(size + 1 > chars.size())) { // +1 for NUL
-        chars.resize(size + 1);
-        xkb_state_key_get_utf8(state, code, chars.data(), chars.size());
-    }
-    return QString::fromUtf8(chars.constData(), size);
-}
-
-QString QXcbKeyboard::lookupStringNoKeysymTransformations(xkb_keysym_t keysym) const
-{
-    QVarLengthArray<char, 32> chars(32);
-    const int size = xkb_keysym_to_utf8(keysym, chars.data(), chars.size());
-    if (Q_UNLIKELY(size > chars.size())) {
-        chars.resize(size);
-        xkb_keysym_to_utf8(keysym, chars.data(), chars.size());
-    }
-    return QString::fromUtf8(chars.constData(), size);
-}
-
 static bool fromSendEvent(const void *event)
 {
     // From X11 protocol: Every event contains an 8-bit type code. The most