Initial commit

nova-components/NovaLeader/node_modules/sockjs-client/lib/event/emitter.js

@@ -0,0 +1,57 @@
+'use strict';
+
+var inherits = require('inherits')
+  , EventTarget = require('./eventtarget')
+  ;
+
+function EventEmitter() {
+  EventTarget.call(this);
+}
+
+inherits(EventEmitter, EventTarget);
+
+EventEmitter.prototype.removeAllListeners = function(type) {
+  if (type) {
+    delete this._listeners[type];
+  } else {
+    this._listeners = {};
+  }
+};
+
+EventEmitter.prototype.once = function(type, listener) {
+  var self = this
+    , fired = false;
+
+  function g() {
+    self.removeListener(type, g);
+
+    if (!fired) {
+      fired = true;
+      listener.apply(this, arguments);
+    }
+  }
+
+  this.on(type, g);
+};
+
+EventEmitter.prototype.emit = function() {
+  var type = arguments[0];
+  var listeners = this._listeners[type];
+  if (!listeners) {
+    return;
+  }
+  // equivalent of Array.prototype.slice.call(arguments, 1);
+  var l = arguments.length;
+  var args = new Array(l - 1);
+  for (var ai = 1; ai < l; ai++) {
+    args[ai - 1] = arguments[ai];
+  }
+  for (var i = 0; i < listeners.length; i++) {
+    listeners[i].apply(this, args);
+  }
+};
+
+EventEmitter.prototype.on = EventEmitter.prototype.addListener = EventTarget.prototype.addEventListener;
+EventEmitter.prototype.removeListener = EventTarget.prototype.removeEventListener;
+
+module.exports.EventEmitter = EventEmitter;