puppeteer/packages/puppeteer-core/src/cdp/TargetManager.ts

76 lines
2.3 KiB
TypeScript

/**
* Copyright 2022 Google Inc. All rights reserved.
*
* 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.
*/
import type {Protocol} from 'devtools-protocol';
import type {CDPSession} from '../api/CDPSession.js';
import type {EventEmitter, EventType} from '../common/EventEmitter.js';
import type {CdpTarget} from './Target.js';
/**
* @internal
*/
export type TargetFactory = (
targetInfo: Protocol.Target.TargetInfo,
session?: CDPSession,
parentSession?: CDPSession
) => CdpTarget;
/**
* @internal
*/
export const enum TargetManagerEvent {
TargetDiscovered = 'targetDiscovered',
TargetAvailable = 'targetAvailable',
TargetGone = 'targetGone',
/**
* Emitted after a target has been initialized and whenever its URL changes.
*/
TargetChanged = 'targetChanged',
}
/**
* @internal
*/
export interface TargetManagerEvents extends Record<EventType, unknown> {
[TargetManagerEvent.TargetAvailable]: CdpTarget;
[TargetManagerEvent.TargetDiscovered]: Protocol.Target.TargetInfo;
[TargetManagerEvent.TargetGone]: CdpTarget;
[TargetManagerEvent.TargetChanged]: {
target: CdpTarget;
wasInitialized: true;
previousURL: string;
};
}
/**
* TargetManager encapsulates all interactions with CDP targets and is
* responsible for coordinating the configuration of targets with the rest of
* Puppeteer. Code outside of this class should not subscribe `Target.*` events
* and only use the TargetManager events.
*
* There are two implementations: one for Chrome that uses CDP's auto-attach
* mechanism and one for Firefox because Firefox does not support auto-attach.
*
* @internal
*/
export interface TargetManager extends EventEmitter<TargetManagerEvents> {
getAvailableTargets(): ReadonlyMap<string, CdpTarget>;
initialize(): Promise<void>;
dispose(): void;
}