function normalizeCommandKeys()

in lib/ace/lib/event.js [229:283]


function normalizeCommandKeys(callback, e, keyCode) {
    var hashId = getModifierHash(e);

    if (!useragent.isMac && pressedKeys) {
        if (e.getModifierState && (e.getModifierState("OS") || e.getModifierState("Win")))
            hashId |= 8;
        if (pressedKeys.altGr) {
            if ((3 & hashId) != 3)
                pressedKeys.altGr = 0;
            else
                return;
        }
        if (keyCode === 18 || keyCode === 17) {
            var location = "location" in e ? e.location : e.keyLocation;
            if (keyCode === 17 && location === 1) {
                if (pressedKeys[keyCode] == 1)
                    ts = e.timeStamp;
            } else if (keyCode === 18 && hashId === 3 && location === 2) {
                var dt = e.timeStamp - ts;
                if (dt < 50)
                    pressedKeys.altGr = true;
            }
        }
    }
    
    if (keyCode in keys.MODIFIER_KEYS) {
        keyCode = -1;
    }
    
    if (!hashId && keyCode === 13) {
        var location = "location" in e ? e.location : e.keyLocation;
        if (location === 3) {
            callback(e, hashId, -keyCode);
            if (e.defaultPrevented)
                return;
        }
    }
    
    if (useragent.isChromeOS && hashId & 8) {
        callback(e, hashId, keyCode);
        if (e.defaultPrevented)
            return;
        else
            hashId &= ~8;
    }

    // If there is no hashId and the keyCode is not a function key, then
    // we don't call the callback as we don't handle a command key here
    // (it's a normal key/character input).
    if (!hashId && !(keyCode in keys.FUNCTION_KEYS) && !(keyCode in keys.PRINTABLE_KEYS)) {
        return false;
    }
    
    return callback(e, hashId, keyCode);
}