insomnia/app/lib/mousetrap/mousetrap-global.js

/**
 * adds a bindGlobal method to Mousetrap that allows you to
 * bind specific keyboard shortcuts that will still work
 * inside a text input field
 *
 * usage:
 * Mousetrap.bindGlobal('ctrl+s', _saveChanges);
 */
/* global Mousetrap:true */
module.exports = function(MT) {
  var _globalCallbacks = {};
  var _originalStopCallback = MT.prototype.stopCallback;

  MT.prototype.stopCallback = function(e, element, combo, sequence) {
    var self = this;

    if (self.paused) {
      return true;
    }

    if (_globalCallbacks[combo] || _globalCallbacks[sequence]) {
      return false;
    }

    return _originalStopCallback.call(self, e, element, combo);
  };

  MT.prototype.bindGlobal = function(keys, callback, action) {
    var self = this;
    self.bind(keys, callback, action);

    if (keys instanceof Array) {
      for (var i = 0; i < keys.length; i++) {
        _globalCallbacks[keys[i]] = true;
      }
      return;
    }

    _globalCallbacks[keys] = true;
  };

  MT.init();
};