1// Copyright 2013 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5// Special unload event. We don't use the DOM unload because that slows down 6// tab shutdown. On the other hand, onUnload might not always fire, since 7// Chrome will terminate renderers on shutdown (SuddenTermination). 8 9// Implement a primitive subset of the Event interface as needed, since if this 10// was to use the real event object there would be a circular dependency. 11var listeners = []; 12 13exports.addListener = function(listener) { 14 $Array.push(listeners, listener); 15}; 16 17exports.removeListener = function(listener) { 18 for (var i = 0; i < listeners.length; ++i) { 19 if (listeners[i] == listener) { 20 $Array.splice(listeners, i, 1); 21 return; 22 } 23 } 24}; 25 26exports.wasDispatched = false; 27 28// dispatch() is called from C++. 29exports.dispatch = function() { 30 exports.wasDispatched = true; 31 for (var i = 0; i < listeners.length; ++i) 32 listeners[i](); 33}; 34