Function _handleKey

client/vendors/mousetrap.js:466–544

* handles a character key event * * @param {string} character * @param {Array} modifiers * @param {Event} e * @returns void

(character, modifiers, e)

     * @returns void
     */
    function _handleKey(character, modifiers, e) {
        var callbacks = _getMatches(character, modifiers, e),
            i,
            doNotReset = {},
            maxLevel = 0,
            processedSequenceCallback = false;

        // Calculate the maxLevel for sequences so we can only execute the longest callback sequence
        for (i = 0; i < callbacks.length; ++i) {
            if (callbacks[i].seq) {
                maxLevel = Math.max(maxLevel, callbacks[i].level);
            }
        }

        // loop through matching callbacks for this key event
        for (i = 0; i < callbacks.length; ++i) {

            // fire for all sequence callbacks
            // this is because if for example you have multiple sequences
            // bound such as "g i" and "g t" they both need to fire the
            // callback for matching g cause otherwise you can only ever
            // match the first one
            if (callbacks[i].seq) {

                // only fire callbacks for the maxLevel to prevent
                // subsequences from also firing
                //
                // for example 'a option b' should not cause 'option b' to fire
                // even though 'option b' is part of the other sequence
                //
                // any sequences that do not match here will be discarded
                // below by the _resetSequences call
                if (callbacks[i].level != maxLevel) {
                    continue;
                }

                processedSequenceCallback = true;

                // keep a list of which sequences were matches for later
                doNotReset[callbacks[i].seq] = 1;
                _fireCallback(callbacks[i].callback, e, callbacks[i].combo, callbacks[i].seq);
                continue;
            }

            // if there were no sequence matches but we are still here
            // that means this is a regular match so we should fire that
            if (!processedSequenceCallback) {
                _fireCallback(callbacks[i].callback, e, callbacks[i].combo);
            }
        }

        // if the key you pressed matches the type of sequence without
        // being a modifier (ie "keyup" or "keypress") then we should
        // reset all sequences that were not matched by this event
        //
        // this is so, for example, if you have the sequence "h a t" and you
        // type "h e a r t" it does not match.  in this case the "e" will
        // cause the sequence to reset