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bin/pac/tools/.playwright/package/lib/client/joiningEventEmitter.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.JoiningEventEmitter = void 0;
+var _events = require("events");
+var _multimap = require("../utils/multimap");
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the 'License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const originalListener = Symbol('originalListener');
+const wrapperListener = Symbol('wrapperListener');
+class JoiningEventEmitter {
+  constructor() {
+    this._emitterDelegate = new _events.EventEmitter();
+    this._pendingPromises = new _multimap.MultiMap();
+  }
+  addListener(event, listener) {
+    this._emitterDelegate.addListener(event, this._wrap(event, listener));
+    return this;
+  }
+  on(event, listener) {
+    this._emitterDelegate.on(event, this._wrap(event, listener));
+    return this;
+  }
+  once(event, listener) {
+    const onceWrapper = (...args) => {
+      listener(...args);
+      this.off(event, onceWrapper);
+    };
+    this.on(event, onceWrapper);
+    return this;
+  }
+  removeListener(event, listener) {
+    this._emitterDelegate.removeListener(event, this._wrapper(listener));
+    return this;
+  }
+  off(event, listener) {
+    this._emitterDelegate.off(event, this._wrapper(listener));
+    return this;
+  }
+  removeAllListeners(event) {
+    this._emitterDelegate.removeAllListeners(event);
+    return this;
+  }
+  setMaxListeners(n) {
+    this._emitterDelegate.setMaxListeners(n);
+    return this;
+  }
+  getMaxListeners() {
+    return this._emitterDelegate.getMaxListeners();
+  }
+  listeners(event) {
+    return this._emitterDelegate.listeners(event).map(f => this._original(f));
+  }
+  rawListeners(event) {
+    return this._emitterDelegate.rawListeners(event).map(f => this._original(f));
+  }
+  emit(event, ...args) {
+    return this._emitterDelegate.emit(event, ...args);
+  }
+  listenerCount(event) {
+    return this._emitterDelegate.listenerCount(event);
+  }
+  prependListener(event, listener) {
+    this._emitterDelegate.prependListener(event, this._wrap(event, listener));
+    return this;
+  }
+  prependOnceListener(event, listener) {
+    const onceWrapper = (...args) => {
+      listener(...args);
+      this.off(event, onceWrapper);
+    };
+    this.prependListener(event, onceWrapper);
+    return this;
+  }
+  eventNames() {
+    return this._emitterDelegate.eventNames();
+  }
+  async _joinPendingEventHandlers() {
+    await Promise.all([...this._pendingPromises.values()]);
+  }
+  _wrap(event, listener) {
+    const wrapper = (...args) => {
+      const result = listener(...args);
+      if (result instanceof Promise) {
+        this._pendingPromises.set(event, result);
+        result.finally(() => this._pendingPromises.delete(event, result));
+      }
+    };
+    wrapper[originalListener] = listener;
+    listener[wrapperListener] = wrapper;
+    return wrapper;
+  }
+  _wrapper(listener) {
+    var _wrapperListener;
+    // Fallback to original listener if not wrapped to ensure backwards compatibility Node.js's event emitter
+    return (_wrapperListener = listener[wrapperListener]) !== null && _wrapperListener !== void 0 ? _wrapperListener : listener;
+  }
+  _original(wrapper) {
+    return wrapper[originalListener];
+  }
+}
+exports.JoiningEventEmitter = JoiningEventEmitter;