text: /*
   *
   *  Air Horner
   *  Copyright 2015 Google Inc. All rights reserved.
   *
   *  Licensed under the Apache License, Version 2.0 (the "License");
   *  you may not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *      https://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS,
   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License
   *
   */
  
  var EventManager = new (function () {
    var events = {};
  
    this.publish = function (name, data) {
      var handlers = events[name];
      if (!!handlers === false) return;
      handlers.forEach(function (handler) {
        handler.call(this, data);
      });
    };
  
    this.subscribe = function (name, handler) {
      var handlers = events[name];
      if (!!handlers === false) {
        handlers = events[name] = [];
      }
      handlers.push(handler);
    };
  
    this.unsubscribe = function (name, handler) {
      var handlers = events[name];
      if (!!handlers === false) return;
  
      var handlerIdx = handlers.indexOf(handler);
      handlers.splice(handlerIdx);
    };
  })();
  