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node_modules/react-native/Libraries/EventEmitter/NativeEventEmitter.d.ts

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+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import EventEmitter, {
+  EmitterSubscription,
+} from '../vendor/emitter/EventEmitter';
+
+/**
+ * The React Native implementation of the IOS RCTEventEmitter which is required when creating
+ * a module that communicates with IOS
+ */
+type NativeModule = {
+  /**
+   * Add the provided eventType as an active listener
+   * @param eventType name of the event for which we are registering listener
+   */
+  addListener: (eventType: string) => void;
+
+  /**
+   * Remove a specified number of events.  There are no eventTypes in this case, as
+   * the native side doesn't remove the name, but only manages a counter of total
+   * listeners
+   * @param count number of listeners to remove (of any type)
+   */
+  removeListeners: (count: number) => void;
+};
+
+/**
+ * Abstract base class for implementing event-emitting modules. This implements
+ * a subset of the standard EventEmitter node module API.
+ */
+declare class NativeEventEmitter extends EventEmitter {
+  /**
+   * @param nativeModule the NativeModule implementation.  This is required on IOS and will throw
+   *      an invariant error if undefined.
+   */
+  constructor(nativeModule?: NativeModule);
+
+  /**
+   * Add the specified listener, this call passes through to the NativeModule
+   * addListener
+   *
+   * @param eventType name of the event for which we are registering listener
+   * @param listener the listener function
+   * @param context context of the listener
+   */
+  addListener(
+    eventType: string,
+    listener: (event: any) => void,
+    context?: Object,
+  ): EmitterSubscription;
+
+  /**
+   * @param eventType  name of the event whose registered listeners to remove
+   */
+  removeAllListeners(eventType: string): void;
+}

node_modules/react-native/Libraries/EventEmitter/NativeEventEmitter.js

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+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+'use strict';
+
+import type {
+  EventSubscription,
+  IEventEmitter,
+} from '../vendor/emitter/EventEmitter';
+
+import Platform from '../Utilities/Platform';
+import RCTDeviceEventEmitter from './RCTDeviceEventEmitter';
+import invariant from 'invariant';
+
+interface NativeModule {
+  addListener(eventType: string): void;
+  removeListeners(count: number): void;
+}
+
+/** @deprecated Use `EventSubscription` instead. */
+type EmitterSubscription = EventSubscription;
+
+export type {EventSubscription, EmitterSubscription};
+/** @deprecated Use `EventSubscription` instead. */
+export type NativeEventSubscription = EventSubscription;
+
+// $FlowFixMe[unclear-type] unclear type of events
+type UnsafeNativeEventObject = Object;
+
+/**
+ * `NativeEventEmitter` is intended for use by Native Modules to emit events to
+ * JavaScript listeners. If a `NativeModule` is supplied to the constructor, it
+ * will be notified (via `addListener` and `removeListeners`) when the listener
+ * count changes to manage "native memory".
+ *
+ * Currently, all native events are fired via a global `RCTDeviceEventEmitter`.
+ * This means event names must be globally unique, and it means that call sites
+ * can theoretically listen to `RCTDeviceEventEmitter` (although discouraged).
+ */
+export default class NativeEventEmitter<
+  TEventToArgsMap: $ReadOnly<
+    Record<string, $ReadOnlyArray<UnsafeNativeEventObject>>,
+  > = $ReadOnly<Record<string, $ReadOnlyArray<UnsafeNativeEventObject>>>,
+> implements IEventEmitter<TEventToArgsMap>
+{
+  _nativeModule: ?NativeModule;
+
+  constructor(nativeModule?: ?NativeModule) {
+    if (Platform.OS === 'ios') {
+      invariant(
+        nativeModule != null,
+        '`new NativeEventEmitter()` requires a non-null argument.',
+      );
+    }
+
+    const hasAddListener =
+      // $FlowFixMe[method-unbinding] added when improving typing for this parameters
+      !!nativeModule && typeof nativeModule.addListener === 'function';
+    const hasRemoveListeners =
+      // $FlowFixMe[method-unbinding] added when improving typing for this parameters
+      !!nativeModule && typeof nativeModule.removeListeners === 'function';
+
+    if (nativeModule && hasAddListener && hasRemoveListeners) {
+      this._nativeModule = nativeModule;
+    } else if (nativeModule != null) {
+      if (!hasAddListener) {
+        console.warn(
+          '`new NativeEventEmitter()` was called with a non-null argument without the required `addListener` method.',
+        );
+      }
+      if (!hasRemoveListeners) {
+        console.warn(
+          '`new NativeEventEmitter()` was called with a non-null argument without the required `removeListeners` method.',
+        );
+      }
+    }
+  }
+
+  addListener<TEvent: $Keys<TEventToArgsMap>>(
+    eventType: TEvent,
+    listener: (...args: TEventToArgsMap[TEvent]) => mixed,
+    context?: mixed,
+  ): EventSubscription {
+    this._nativeModule?.addListener(eventType);
+    let subscription: ?EventSubscription = RCTDeviceEventEmitter.addListener(
+      eventType,
+      listener,
+      context,
+    );
+
+    return {
+      remove: () => {
+        if (subscription != null) {
+          this._nativeModule?.removeListeners(1);
+          // $FlowFixMe[incompatible-use]
+          subscription.remove();
+          subscription = null;
+        }
+      },
+    };
+  }
+
+  emit<TEvent: $Keys<TEventToArgsMap>>(
+    eventType: TEvent,
+    ...args: TEventToArgsMap[TEvent]
+  ): void {
+    // Generally, `RCTDeviceEventEmitter` is directly invoked. But this is
+    // included for completeness.
+    RCTDeviceEventEmitter.emit(eventType, ...args);
+  }
+
+  removeAllListeners<TEvent: $Keys<TEventToArgsMap>>(
+    eventType?: ?TEvent,
+  ): void {
+    invariant(
+      eventType != null,
+      '`NativeEventEmitter.removeAllListener()` requires a non-null argument.',
+    );
+    this._nativeModule?.removeListeners(this.listenerCount(eventType));
+    RCTDeviceEventEmitter.removeAllListeners(eventType);
+  }
+
+  listenerCount<TEvent: $Keys<TEventToArgsMap>>(eventType: TEvent): number {
+    return RCTDeviceEventEmitter.listenerCount(eventType);
+  }
+}

node_modules/react-native/Libraries/EventEmitter/RCTDeviceEventEmitter.d.ts

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+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import EventEmitter, {
+  EmitterSubscription,
+  EventSubscriptionVendor,
+} from '../vendor/emitter/EventEmitter';
+
+/**
+ * Deprecated - subclass NativeEventEmitter to create granular event modules instead of
+ * adding all event listeners directly to RCTDeviceEventEmitter.
+ */
+interface DeviceEventEmitterStatic extends EventEmitter {
+  sharedSubscriber: EventSubscriptionVendor;
+  new (): DeviceEventEmitterStatic;
+  addListener(
+    type: string,
+    listener: (data: any) => void,
+    context?: any,
+  ): EmitterSubscription;
+}
+
+export const DeviceEventEmitter: DeviceEventEmitterStatic;

node_modules/react-native/Libraries/EventEmitter/RCTDeviceEventEmitter.js

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+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ * @format
+ */
+
+import type {IEventEmitter} from '../vendor/emitter/EventEmitter';
+
+import {beginEvent, endEvent} from '../Performance/Systrace';
+import EventEmitter from '../vendor/emitter/EventEmitter';
+
+// FIXME: use typed events
+/* $FlowFixMe[unclear-type] unclear type of events */
+type RCTDeviceEventDefinitions = {[name: string]: Array<any>};
+
+/**
+ * Global EventEmitter used by the native platform to emit events to JavaScript.
+ * Events are identified by globally unique event names.
+ *
+ * NativeModules that emit events should instead subclass `NativeEventEmitter`.
+ */
+class RCTDeviceEventEmitterImpl extends EventEmitter<RCTDeviceEventDefinitions> {
+  // Add systrace to RCTDeviceEventEmitter.emit method for debugging
+  emit<TEvent: $Keys<RCTDeviceEventDefinitions>>(
+    eventType: TEvent,
+    ...args: RCTDeviceEventDefinitions[TEvent]
+  ): void {
+    beginEvent(() => `RCTDeviceEventEmitter.emit#${eventType}`);
+    try {
+      super.emit(eventType, ...args);
+    } finally {
+      endEvent();
+    }
+  }
+}
+const RCTDeviceEventEmitter: IEventEmitter<RCTDeviceEventDefinitions> =
+  new RCTDeviceEventEmitterImpl();
+
+Object.defineProperty(global, '__rctDeviceEventEmitter', {
+  configurable: true,
+  value: RCTDeviceEventEmitter,
+});
+
+export default (RCTDeviceEventEmitter: IEventEmitter<RCTDeviceEventDefinitions>);

node_modules/react-native/Libraries/EventEmitter/RCTEventEmitter.js

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+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+import registerCallableModule from '../Core/registerCallableModule';
+
+const RCTEventEmitter = {
+  register(eventEmitter: any) {
+    registerCallableModule('RCTEventEmitter', eventEmitter);
+  },
+};
+
+export default RCTEventEmitter;

node_modules/react-native/Libraries/EventEmitter/RCTNativeAppEventEmitter.d.ts

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+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {DeviceEventEmitterStatic} from './RCTDeviceEventEmitter';
+
+export interface NativeEventSubscription {
+  /**
+   * Call this method to un-subscribe from a native-event
+   */
+  remove(): void;
+}
+
+/**
+ * Receive events from native-code
+ * Deprecated - subclass NativeEventEmitter to create granular event modules instead of
+ * adding all event listeners directly to RCTNativeAppEventEmitter.
+ * @see https://github.com/facebook/react-native/blob/0.34-stable\Libraries\EventEmitter\RCTNativeAppEventEmitter.js
+ * @see https://reactnative.dev/docs/native-modules-ios#sending-events-to-javascript
+ */
+type RCTNativeAppEventEmitter = DeviceEventEmitterStatic;
+
+/**
+ * Deprecated - subclass NativeEventEmitter to create granular event modules instead of
+ * adding all event listeners directly to RCTNativeAppEventEmitter.
+ */
+export const NativeAppEventEmitter: RCTNativeAppEventEmitter;

node_modules/react-native/Libraries/EventEmitter/RCTNativeAppEventEmitter.js

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+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+import RCTDeviceEventEmitter from './RCTDeviceEventEmitter';
+
+/**
+ * Deprecated - subclass NativeEventEmitter to create granular event modules instead of
+ * adding all event listeners directly to RCTNativeAppEventEmitter.
+ */
+const RCTNativeAppEventEmitter = RCTDeviceEventEmitter;
+export default RCTNativeAppEventEmitter;