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chore: refactor frame tree management (#8952)

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This PR removes the strong references between
parent and child frames and stores the frame in a
lazy FrameTree with weak references.

Drive-by: fix --no-coverage flag in test runner
This commit is contained in:
Alex Rudenko 2022-09-16 07:35:51 +02:00 committed by GitHub
parent 2a2af7134f
commit cd09c3cee7
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 190 additions and 138 deletions
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36
src/common/Frame.ts
View File

@ -1,3 +1,19 @@
/**
* Copyright 2017 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 {Protocol} from 'devtools-protocol';
import {assert} from '../util/assert.js';
import {isErrorLike} from '../util/ErrorLike.js';
@ -150,7 +166,6 @@ export interface FrameAddStyleTagOptions {
* @public
*/
export class Frame {
#parentFrame: Frame | null;
#url = '';
#detached = false;
#client!: CDPSession;
@ -186,30 +201,25 @@ export class Frame {
/**
* @internal
*/
_childFrames: Set<Frame>;
_parentId?: string;
/**
* @internal
*/
constructor(
frameManager: FrameManager,
parentFrame: Frame | null,
frameId: string,
parentFrameId: string | undefined,
client: CDPSession
) {
this._frameManager = frameManager;
this.#parentFrame = parentFrame ?? null;
this.#url = '';
this._id = frameId;
this._parentId = parentFrameId;
this.#detached = false;
this._loaderId = '';
this._childFrames = new Set();
if (this.#parentFrame) {
this.#parentFrame._childFrames.add(this);
}
this.updateClient(client);
}
@ -720,14 +730,14 @@ export class Frame {
* @returns The parent frame, if any. Detached and main frames return `null`.
*/
parentFrame(): Frame | null {
return this.#parentFrame;
return this._frameManager._frameTree.parentFrame(this._id) || null;
}
/**
* @returns An array of child frames.
*/
childFrames(): Frame[] {
return Array.from(this._childFrames);
return this._frameManager._frameTree.childFrames(this._id);
}
/**
@ -1090,9 +1100,5 @@ export class Frame {
this.#detached = true;
this.worlds[MAIN_WORLD]._detach();
this.worlds[PUPPETEER_WORLD]._detach();
if (this.#parentFrame) {
this.#parentFrame._childFrames.delete(this);
}
this.#parentFrame = null;
}
}

161
src/common/FrameManager.ts
View File

@ -16,13 +16,12 @@
import {Protocol} from 'devtools-protocol';
import {assert} from '../util/assert.js';
import {createDebuggableDeferredPromise} from '../util/DebuggableDeferredPromise.js';
import {DeferredPromise} from '../util/DeferredPromise.js';
import {isErrorLike} from '../util/ErrorLike.js';
import {CDPSession, isTargetClosedError} from './Connection.js';
import {EventEmitter} from './EventEmitter.js';
import {EVALUATION_SCRIPT_URL, ExecutionContext} from './ExecutionContext.js';
import {Frame} from './Frame.js';
import {FrameTree} from './FrameTree.js';
import {IsolatedWorld, MAIN_WORLD, PUPPETEER_WORLD} from './IsolatedWorld.js';
import {NetworkManager} from './NetworkManager.js';
import {Page} from './Page.js';
@ -60,20 +59,13 @@ export class FrameManager extends EventEmitter {
#page: Page;
#networkManager: NetworkManager;
#timeoutSettings: TimeoutSettings;
#frames = new Map<string, Frame>();
#contextIdToContext = new Map<string, ExecutionContext>();
#isolatedWorlds = new Set<string>();
#mainFrame?: Frame;
#client: CDPSession;
/**
* Keeps track of OOPIF targets/frames (target ID == frame ID for OOPIFs)
* that are being initialized.
* @internal
*/
#framesPendingTargetInit = new Map<string, DeferredPromise<void>>();
/**
* Keeps track of frames that are in the process of being attached in #onFrameAttached.
*/
#framesPendingAttachment = new Map<string, DeferredPromise<void>>();
_frameTree = new FrameTree();
get timeoutSettings(): TimeoutSettings {
return this.#timeoutSettings;
@ -140,19 +132,8 @@ export class FrameManager extends EventEmitter {
});
}
async initialize(
targetId: string,
client: CDPSession = this.#client
): Promise<void> {
async initialize(client: CDPSession = this.#client): Promise<void> {
try {
if (!this.#framesPendingTargetInit.has(targetId)) {
this.#framesPendingTargetInit.set(
targetId,
createDebuggableDeferredPromise(
`Waiting for target frame ${targetId} failed`
)
);
}
const result = await Promise.all([
client.send('Page.enable'),
client.send('Page.getFrameTree'),
@ -177,9 +158,6 @@ export class FrameManager extends EventEmitter {
}
throw error;
} finally {
this.#framesPendingTargetInit.get(targetId)?.resolve();
this.#framesPendingTargetInit.delete(targetId);
}
}
@ -198,16 +176,17 @@ export class FrameManager extends EventEmitter {
}
mainFrame(): Frame {
assert(this.#mainFrame, 'Requesting main frame too early!');
return this.#mainFrame;
const mainFrame = this._frameTree.getMainFrame();
assert(mainFrame, 'Requesting main frame too early!');
return mainFrame;
}
frames(): Frame[] {
return Array.from(this.#frames.values());
return Array.from(this._frameTree.frames());
}
frame(frameId: string): Frame | null {
return this.#frames.get(frameId) || null;
return this._frameTree.getById(frameId) || null;
}
onAttachedToTarget(target: Target): void {
@ -215,16 +194,16 @@ export class FrameManager extends EventEmitter {
return;
}
const frame = this.#frames.get(target._getTargetInfo().targetId);
const frame = this.frame(target._getTargetInfo().targetId);
if (frame) {
frame.updateClient(target._session()!);
}
this.setupEventListeners(target._session()!);
this.initialize(target._getTargetInfo().targetId, target._session());
this.initialize(target._session());
}
onDetachedFromTarget(target: Target): void {
const frame = this.#frames.get(target._targetId);
const frame = this.frame(target._targetId);
if (frame && frame.isOOPFrame()) {
// When an OOP iframe is removed from the page, it
// will only get a Target.detachedFromTarget event.
@ -233,7 +212,7 @@ export class FrameManager extends EventEmitter {
}
#onLifecycleEvent(event: Protocol.Page.LifecycleEventEvent): void {
const frame = this.#frames.get(event.frameId);
const frame = this.frame(event.frameId);
if (!frame) {
return;
}
@ -242,7 +221,7 @@ export class FrameManager extends EventEmitter {
}
#onFrameStartedLoading(frameId: string): void {
const frame = this.#frames.get(frameId);
const frame = this.frame(frameId);
if (!frame) {
return;
}
@ -250,7 +229,7 @@ export class FrameManager extends EventEmitter {
}
#onFrameStoppedLoading(frameId: string): void {
const frame = this.#frames.get(frameId);
const frame = this.frame(frameId);
if (!frame) {
return;
}
@ -284,8 +263,8 @@ export class FrameManager extends EventEmitter {
frameId: string,
parentFrameId: string
): void {
if (this.#frames.has(frameId)) {
const frame = this.#frames.get(frameId)!;
let frame = this.frame(frameId);
if (frame) {
if (session && frame.isOOPFrame()) {
// If an OOP iframes becomes a normal iframe again
// it is first attached to the parent page before
@ -294,86 +273,41 @@ export class FrameManager extends EventEmitter {
}
return;
}
const parentFrame = this.#frames.get(parentFrameId);
const complete = (parentFrame: Frame) => {
assert(parentFrame, `Parent frame ${parentFrameId} not found`);
const frame = new Frame(this, parentFrame, frameId, session);
this.#frames.set(frame._id, frame);
this.emit(FrameManagerEmittedEvents.FrameAttached, frame);
};
if (parentFrame) {
return complete(parentFrame);
}
const frame = this.#framesPendingTargetInit.get(parentFrameId);
if (frame) {
if (!this.#framesPendingAttachment.has(frameId)) {
this.#framesPendingAttachment.set(
frameId,
createDebuggableDeferredPromise(
`Waiting for frame ${frameId} to attach failed`
)
);
}
frame.then(() => {
complete(this.#frames.get(parentFrameId)!);
this.#framesPendingAttachment.get(frameId)?.resolve();
this.#framesPendingAttachment.delete(frameId);
});
return;
}
throw new Error(`Parent frame ${parentFrameId} not found`);
frame = new Frame(this, frameId, parentFrameId, session);
this._frameTree.addFrame(frame);
this.emit(FrameManagerEmittedEvents.FrameAttached, frame);
}
#onFrameNavigated(framePayload: Protocol.Page.Frame): void {
async #onFrameNavigated(framePayload: Protocol.Page.Frame): Promise<void> {
const frameId = framePayload.id;
const isMainFrame = !framePayload.parentId;
const frame = isMainFrame ? this.#mainFrame : this.#frames.get(frameId);
const complete = (frame?: Frame) => {
assert(
isMainFrame || frame,
`Missing frame isMainFrame=${isMainFrame}, frameId=${frameId}`
);
let frame = this._frameTree.getById(frameId);
// Detach all child frames first.
if (frame) {
for (const child of frame.childFrames()) {
this.#removeFramesRecursively(child);
}
// Detach all child frames first.
if (frame) {
for (const child of frame.childFrames()) {
this.#removeFramesRecursively(child);
}
// Update or create main frame.
if (isMainFrame) {
if (frame) {
// Update frame id to retain frame identity on cross-process navigation.
this.#frames.delete(frame._id);
frame._id = frameId;
} else {
// Initial main frame navigation.
frame = new Frame(this, null, frameId, this.#client);
}
this.#frames.set(frameId, frame);
this.#mainFrame = frame;
}
// Update frame payload.
assert(frame);
frame._navigated(framePayload);
this.emit(FrameManagerEmittedEvents.FrameNavigated, frame);
};
const pendingFrame = this.#framesPendingAttachment.get(frameId);
if (pendingFrame) {
pendingFrame.then(() => {
complete(isMainFrame ? this.#mainFrame : this.#frames.get(frameId));
});
} else {
complete(frame);
}
// Update or create main frame.
if (isMainFrame) {
if (frame) {
// Update frame id to retain frame identity on cross-process navigation.
this._frameTree.removeFrame(frame);
frame._id = frameId;
} else {
// Initial main frame navigation.
frame = new Frame(this, frameId, undefined, this.#client);
}
this._frameTree.addFrame(frame);
}
frame = await this._frameTree.waitForFrame(frameId);
frame._navigated(framePayload);
this.emit(FrameManagerEmittedEvents.FrameNavigated, frame);
}
async #createIsolatedWorld(session: CDPSession, name: string): Promise<void> {
@ -410,7 +344,7 @@ export class FrameManager extends EventEmitter {
}
#onFrameNavigatedWithinDocument(frameId: string, url: string): void {
const frame = this.#frames.get(frameId);
const frame = this.frame(frameId);
if (!frame) {
return;
}
@ -423,7 +357,7 @@ export class FrameManager extends EventEmitter {
frameId: string,
reason: Protocol.Page.FrameDetachedEventReason
): void {
const frame = this.#frames.get(frameId);
const frame = this.frame(frameId);
if (reason === 'remove') {
// Only remove the frame if the reason for the detached event is
// an actual removement of the frame.
@ -442,8 +376,7 @@ export class FrameManager extends EventEmitter {
): void {
const auxData = contextPayload.auxData as {frameId?: string} | undefined;
const frameId = auxData && auxData.frameId;
const frame =
typeof frameId === 'string' ? this.#frames.get(frameId) : undefined;
const frame = typeof frameId === 'string' ? this.frame(frameId) : undefined;
let world: IsolatedWorld | undefined;
if (frame) {
// Only care about execution contexts created for the current session.
@ -509,7 +442,7 @@ export class FrameManager extends EventEmitter {
this.#removeFramesRecursively(child);
}
frame._detach();
this.#frames.delete(frame._id);
this._frameTree.removeFrame(frame);
this.emit(FrameManagerEmittedEvents.FrameDetached, frame);
}
}

111
src/common/FrameTree.ts Normal file
View File

@ -0,0 +1,111 @@
/**
* 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 {
createDeferredPromise,
DeferredPromise,
} from '../util/DeferredPromise.js';
import type {Frame} from './Frame.js';
/**
* Keeps track of the page frame tree and it's is managed by
* {@link FrameManager}. FrameTree uses frame IDs to reference frame and it
* means that referenced frames might not be in the tree anymore. Thus, the tree
* structure is eventually consistent.
* @internal
*/
export class FrameTree {
#frames = new Map<string, Frame>();
// frameID -> parentFrameID
#parentIds = new Map<string, string>();
// frameID -> childFrameIDs
#childIds = new Map<string, Set<string>>();
#mainFrame?: Frame;
#waitRequests = new Map<string, Set<DeferredPromise<Frame>>>();
getMainFrame(): Frame | undefined {
return this.#mainFrame;
}
getById(frameId: string): Frame | undefined {
return this.#frames.get(frameId);
}
/**
* Returns a promise that is resolved once the frame with
* the given ID is added to the tree.
*/
waitForFrame(frameId: string): Promise<Frame> {
const frame = this.getById(frameId);
if (frame) {
return Promise.resolve(frame);
}
const deferred = createDeferredPromise<Frame>();
const callbacks =
this.#waitRequests.get(frameId) || new Set<DeferredPromise<Frame>>();
callbacks.add(deferred);
return deferred;
}
frames(): Frame[] {
return Array.from(this.#frames.values());
}
addFrame(frame: Frame): void {
this.#frames.set(frame._id, frame);
if (frame._parentId) {
this.#parentIds.set(frame._id, frame._parentId);
if (!this.#childIds.has(frame._parentId)) {
this.#childIds.set(frame._parentId, new Set());
}
this.#childIds.get(frame._parentId)!.add(frame._id);
} else {
this.#mainFrame = frame;
}
this.#waitRequests.get(frame._id)?.forEach(request => {
return request.resolve(frame);
});
}
removeFrame(frame: Frame): void {
this.#frames.delete(frame._id);
this.#parentIds.delete(frame._id);
if (frame._parentId) {
this.#childIds.get(frame._parentId)?.delete(frame._id);
} else {
this.#mainFrame = undefined;
}
}
childFrames(frameId: string): Frame[] {
const childIds = this.#childIds.get(frameId);
if (!childIds) {
return [];
}
return Array.from(childIds)
.map(id => {
return this.getById(id);
})
.filter((frame): frame is Frame => {
return frame !== undefined;
});
}
parentFrame(frameId: string): Frame | undefined {
const parentId = this.#parentIds.get(frameId);
return parentId ? this.getById(parentId) : undefined;
}
}

2
src/common/Page.ts
View File

@ -660,7 +660,7 @@ export class Page extends EventEmitter {
async #initialize(): Promise<void> {
try {
await Promise.all([
this.#frameManager.initialize(this.#target._targetId),
this.#frameManager.initialize(),
this.#client.send('Performance.enable'),
this.#client.send('Log.enable'),
]);

1
src/types.ts
View File

@ -24,6 +24,7 @@ export * from './common/FileChooser.js';
export * from './common/FirefoxTargetManager.js';
export * from './common/Frame.js';
export * from './common/FrameManager.js';
export * from './common/FrameTree.js';
export * from './common/HTTPRequest.js';
export * from './common/HTTPResponse.js';
export * from './common/Input.js';

17
utils/mochaRunner/src/main.ts
View File

@ -27,7 +27,7 @@ import {
import path from 'path';
import fs from 'fs';
import os from 'os';
import {spawn} from 'node:child_process';
import {spawn, SpawnOptions} from 'node:child_process';
import {
extendProcessEnv,
filterByPlatform,
@ -126,8 +126,14 @@ async function main() {
'-O',
'output=' + tmpFilename,
];
const spawnArgs: SpawnOptions = {
shell: true,
cwd: process.cwd(),
stdio: 'inherit',
env,
};
const handle = noCoverage
? spawn('npx', ['mocha', ...args])
? spawn('npx', ['mocha', ...args], spawnArgs)
: spawn(
'npx',
[
@ -138,12 +144,7 @@ async function main() {
'npx mocha',
...args,
],
{
shell: true,
cwd: process.cwd(),
stdio: 'inherit',
env,
}
spawnArgs
);
await new Promise<void>((resolve, reject) => {
handle.on('error', err => {