build: move zone.js to angular repo (#30962)

PR Close #30962

packages/zone.js/lib/browser/websocket.ts

@@ -0,0 +1,59 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+// we have to patch the instance since the proto is non-configurable
+export function apply(api: _ZonePrivate, _global: any) {
+  const {ADD_EVENT_LISTENER_STR, REMOVE_EVENT_LISTENER_STR} = api.getGlobalObjects() !;
+  const WS = (<any>_global).WebSocket;
+  // On Safari window.EventTarget doesn't exist so need to patch WS add/removeEventListener
+  // On older Chrome, no need since EventTarget was already patched
+  if (!(<any>_global).EventTarget) {
+    api.patchEventTarget(_global, [WS.prototype]);
+  }
+  (<any>_global).WebSocket = function(x: any, y: any) {
+    const socket = arguments.length > 1 ? new WS(x, y) : new WS(x);
+    let proxySocket: any;
+
+    let proxySocketProto: any;
+
+    // Safari 7.0 has non-configurable own 'onmessage' and friends properties on the socket instance
+    const onmessageDesc = api.ObjectGetOwnPropertyDescriptor(socket, 'onmessage');
+    if (onmessageDesc && onmessageDesc.configurable === false) {
+      proxySocket = api.ObjectCreate(socket);
+      // socket have own property descriptor 'onopen', 'onmessage', 'onclose', 'onerror'
+      // but proxySocket not, so we will keep socket as prototype and pass it to
+      // patchOnProperties method
+      proxySocketProto = socket;
+      [ADD_EVENT_LISTENER_STR, REMOVE_EVENT_LISTENER_STR, 'send', 'close'].forEach(function(
+          propName) {
+        proxySocket[propName] = function() {
+          const args = api.ArraySlice.call(arguments);
+          if (propName === ADD_EVENT_LISTENER_STR || propName === REMOVE_EVENT_LISTENER_STR) {
+            const eventName = args.length > 0 ? args[0] : undefined;
+            if (eventName) {
+              const propertySymbol = Zone.__symbol__('ON_PROPERTY' + eventName);
+              socket[propertySymbol] = proxySocket[propertySymbol];
+            }
+          }
+          return socket[propName].apply(socket, args);
+        };
+      });
+    } else {
+      // we can patch the real socket
+      proxySocket = socket;
+    }
+
+    api.patchOnProperties(proxySocket, ['close', 'error', 'message', 'open'], proxySocketProto);
+    return proxySocket;
+  };
+
+  const globalWebSocket = _global['WebSocket'];
+  for (const prop in WS) {
+    globalWebSocket[prop] = WS[prop];
+  }
+}