Function keysymFromKeyCode

front/include/keyboard.js:200–231

(keycode, shiftPressed)

    // Given a keycode, try to predict which keysym it might be.
    // If the keycode is unknown, null is returned.
    function keysymFromKeyCode(keycode, shiftPressed) {
        if (typeof(keycode) !== 'number') {
            return null;
        }
        // won't be accurate for azerty
        if (keycode >= 0x30 && keycode <= 0x39) {
            return keycode; // digit
        }
        if (keycode >= 0x41 && keycode <= 0x5a) {
            // remap to lowercase unless shift is down
            return shiftPressed ? keycode : keycode + 32; // A-Z
        }
        if (keycode >= 0x60 && keycode <= 0x69) {
            return XK_KP_0 + (keycode - 0x60); // numpad 0-9
        }

        switch(keycode) {
            case 0x20: return XK_space;
            case 0x6a: return XK_KP_Multiply;
            case 0x6b: return XK_KP_Add;
            case 0x6c: return XK_KP_Separator;
            case 0x6d: return XK_KP_Subtract;
            case 0x6e: return XK_KP_Decimal;
            case 0x6f: return XK_KP_Divide;
            case 0xbb: return XK_plus;
            case 0xbc: return XK_comma;
            case 0xbd: return XK_minus;
            case 0xbe: return XK_period;
        }

        return nonCharacterKey({keyCode: keycode});
    }

    // if the key is a known non-character key (any key which doesn't generate character data)
    // return its keysym value. Otherwise return null