Remove event dispatcher

js/h5p-event-dispatcher.js

@@ -1,152 +0,0 @@
-/** @namespace H5P */
-var H5P = H5P || {};
-
-H5P.EventDispatcher = (function () {
-
-  /**
-   * The base of the event system.
-   * Inherit this class if you want your H5P to dispatch events.
-   * @class
-   */
-  function EventDispatcher() {
-    var self = this;
-
-    /**
-     * Keep track of events and listeners for each event.
-     * @private
-     * @type {Object}
-     */
-    var events = {};
-
-    /**
-     * Add new event listener.
-     *
-     * @public
-     * @throws {TypeError} listener must be a function
-     * @param {String} type Event type
-     * @param {Function} listener Event listener
-     */
-    self.on = function (type, listener) {
-      if (!(listener instanceof Function)) {
-        throw TypeError('listener must be a function');
-      }
-
-      // Trigger event before adding to avoid recursion
-      self.trigger('newListener', type, listener);
-
-      if (!events[type]) {
-        // First
-        events[type] = [listener];
-      }
-      else {
-        // Append
-        events[type].push(listener);
-      }
-    };
-
-    /**
-     * Add new event listener that will be fired only once.
-     *
-     * @public
-     * @throws {TypeError} listener must be a function
-     * @param {String} type Event type
-     * @param {Function} listener Event listener
-     */
-    self.once = function (type, listener) {
-      if (!(listener instanceof Function)) {
-        throw TypeError('listener must be a function');
-      }
-
-      var once = function () {
-        self.off(type, once);
-        listener.apply(self, arguments);
-      };
-
-      self.on(type, once);
-    };
-
-    /**
-     * Remove event listener.
-     * If no listener is specified, all listeners will be removed.
-     *
-     * @public
-     * @throws {TypeError} listener must be a function
-     * @param {String} type Event type
-     * @param {Function} [listener] Event listener
-     */
-    self.off = function (type, listener) {
-      if (listener !== undefined && !(listener instanceof Function)) {
-        throw TypeError('listener must be a function');
-      }
-
-      if (events[type] === undefined) {
-        return;
-      }
-
-      if (listener === undefined) {
-        // Remove all listeners
-        delete events[type];
-        self.trigger('removeListener', type);
-        return;
-      }
-
-      // Find specific listener
-      for (var i = 0; i < events[type].length; i++) {
-        if (events[type][i] === listener) {
-          events[type].unshift(i, 1);
-          self.trigger('removeListener', type, listener);
-          break;
-        }
-      }
-
-      // Clean up empty arrays
-      if (!events[type].length) {
-        delete events[type];
-      }
-    };
-
-    /**
-     * Creates a copy of the arguments list. Skips the given number of arguments.
-     *
-     * @private
-     * @param {Array} args List of arguments
-     * @param {Number} skip Number of arguments to skip
-     * @param {Array} Copy og arguments list
-     */
-    var getArgs = function (args, skip) {
-      var left = [];
-      for (var i = skip; i < args.length; i++) {
-        left.push(args[i]);
-      }
-      return left;
-    };
-
-    /**
-     * Dispatch event.
-     *
-     * @public
-     * @param {String} type Event type
-     * @param {...*} args
-     */
-    self.trigger = function (type) {
-      if (self.debug !== undefined) {
-        // Class has debug enabled. Log events.
-        console.log(self.debug + ' - Firing event "' + type + '", ' + (events[type] === undefined ? 0 : events[type].length) + ' listeners.', getArgs(arguments, 1));
-      }
-
-      if (events[type] === undefined) {
-        return;
-      }
-
-      // Copy all arguments except the first
-      var args = getArgs(arguments, 1);
-
-      // Call all listeners
-      for (var i = 0; i < events[type].length; i++) {
-        events[type][i].apply(self, args);
-      }
-    };
-  }
-
-  return EventDispatcher;
-})();