First commit

hGameTest/node_modules/sockjs-client/lib/utils/event.js

@@ -0,0 +1,73 @@
+'use strict';
+
+var random = require('./random');
+
+var onUnload = {}
+  , afterUnload = false
+    // detect google chrome packaged apps because they don't allow the 'unload' event
+  , isChromePackagedApp = global.chrome && global.chrome.app && global.chrome.app.runtime
+  ;
+
+module.exports = {
+  attachEvent: function(event, listener) {
+    if (typeof global.addEventListener !== 'undefined') {
+      global.addEventListener(event, listener, false);
+    } else if (global.document && global.attachEvent) {
+      // IE quirks.
+      // According to: http://stevesouders.com/misc/test-postmessage.php
+      // the message gets delivered only to 'document', not 'window'.
+      global.document.attachEvent('on' + event, listener);
+      // I get 'window' for ie8.
+      global.attachEvent('on' + event, listener);
+    }
+  }
+
+, detachEvent: function(event, listener) {
+    if (typeof global.addEventListener !== 'undefined') {
+      global.removeEventListener(event, listener, false);
+    } else if (global.document && global.detachEvent) {
+      global.document.detachEvent('on' + event, listener);
+      global.detachEvent('on' + event, listener);
+    }
+  }
+
+, unloadAdd: function(listener) {
+    if (isChromePackagedApp) {
+      return null;
+    }
+
+    var ref = random.string(8);
+    onUnload[ref] = listener;
+    if (afterUnload) {
+      setTimeout(this.triggerUnloadCallbacks, 0);
+    }
+    return ref;
+  }
+
+, unloadDel: function(ref) {
+    if (ref in onUnload) {
+      delete onUnload[ref];
+    }
+  }
+
+, triggerUnloadCallbacks: function() {
+    for (var ref in onUnload) {
+      onUnload[ref]();
+      delete onUnload[ref];
+    }
+  }
+};
+
+var unloadTriggered = function() {
+  if (afterUnload) {
+    return;
+  }
+  afterUnload = true;
+  module.exports.triggerUnloadCallbacks();
+};
+
+// 'unload' alone is not reliable in opera within an iframe, but we
+// can't use `beforeunload` as IE fires it on javascript: links.
+if (!isChromePackagedApp) {
+  module.exports.attachEvent('unload', unloadTriggered);
+}