1 files changed, 109 insertions, 0 deletions
diff --git a/js/vendor/ev-emitter/ev-emitter.js b/js/vendor/ev-emitter/ev-emitter.js
new file mode 100644
index 000000000..212a978a8
--- /dev/null
+++ b/js/vendor/ev-emitter/ev-emitter.js
@@ -0,0 +1,109 @@
+/**
+ * EvEmitter v1.0.1
+ * Lil' event emitter
+ * MIT License
+ */
+
+/* jshint unused: true, undef: true, strict: true */
+
+( function( global, factory ) {
+  // universal module definition
+  /* jshint strict: false */ /* globals define, module */
+  if ( typeof define == 'function' && define.amd ) {
+    // AMD - RequireJS
+    define( factory );
+  } else if ( typeof module == 'object' && module.exports ) {
+    // CommonJS - Browserify, Webpack
+    module.exports = factory();
+  } else {
+    // Browser globals
+    global.EvEmitter = factory();
+  }
+
+}( this, function() {
+
+"use strict";
+
+function EvEmitter() {}
+
+var proto = EvEmitter.prototype;
+
+proto.on = function( eventName, listener ) {
+  if ( !eventName || !listener ) {
+    return;
+  }
+  // set events hash
+  var events = this._events = this._events || {};
+  // set listeners array
+  var listeners = events[ eventName ] = events[ eventName ] || [];
+  // only add once
+  if ( listeners.indexOf( listener ) == -1 ) {
+    listeners.push( listener );
+  }
+
+  return this;
+};
+
+proto.once = function( eventName, listener ) {
+  if ( !eventName || !listener ) {
+    return;
+  }
+  // add event
+  this.on( eventName, listener );
+  // set once flag
+  // set onceEvents hash
+  var onceEvents = this._onceEvents = this._onceEvents || {};
+  // set onceListeners array
+  var onceListeners = onceEvents[ eventName ] = onceEvents[ eventName ] || [];
+  // set flag
+  onceListeners[ listener ] = true;
+
+  return this;
+};
+
+proto.off = function( eventName, listener ) {
+  var listeners = this._events && this._events[ eventName ];
+  if ( !listeners || !listeners.length ) {
+    return;
+  }
+  var index = listeners.indexOf( listener );
+  if ( index != -1 ) {
+    listeners.splice( index, 1 );
+  }
+
+  return this;
+};
+
+proto.emitEvent = function( eventName, args ) {
+  var listeners = this._events && this._events[ eventName ];
+  if ( !listeners || !listeners.length ) {
+    return;
+  }
+  var i = 0;
+  var listener = listeners[i];
+  args = args || [];
+  // once stuff
+  var onceListeners = this._onceEvents && this._onceEvents[ eventName ];
+
+  while ( listener ) {
+    var isOnce = onceListeners && onceListeners[ listener ];
+    if ( isOnce ) {
+      // remove listener
+      // remove before trigger to prevent recursion
+      this.off( eventName, listener );
+      // unset once flag
+      delete onceListeners[ listener ];
+    }
+    // trigger listener
+    listener.apply( this, args );
+    // get next listener
+    i += isOnce ? 0 : 1;
+    listener = listeners[i];
+  }
+
+  return this;
+};
+
+return EvEmitter;
+
+}));