initial commit

node_modules/emissary/lib/subscription.js

@@ -0,0 +1,40 @@
+(function() {
+  var Emitter, Subscription,
+    __hasProp = {}.hasOwnProperty,
+    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };
+
+  Emitter = require('./emitter');
+
+  module.exports = Subscription = (function(_super) {
+    __extends(Subscription, _super);
+
+    Subscription.prototype.cancelled = false;
+
+    function Subscription(emitter, eventNames, handler) {
+      this.emitter = emitter;
+      this.eventNames = eventNames;
+      this.handler = handler;
+    }
+
+    Subscription.prototype.off = function() {
+      return this.dispose();
+    };
+
+    Subscription.prototype.dispose = function() {
+      var unsubscribe, _ref;
+      if (this.cancelled) {
+        return;
+      }
+      unsubscribe = (_ref = this.emitter.off) != null ? _ref : this.emitter.removeListener;
+      unsubscribe.call(this.emitter, this.eventNames, this.handler);
+      this.emitter = null;
+      this.handler = null;
+      this.cancelled = true;
+      return this.emit('cancelled');
+    };
+
+    return Subscription;
+
+  })(Emitter);
+
+}).call(this);