puppeteer-core
Version:
A high-level API to control headless Chrome over the DevTools Protocol
95 lines • 2.94 kB
JavaScript
"use strict";
/**
* @license
* Copyright 2022 Google Inc.
* SPDX-License-Identifier: Apache-2.0
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.FrameTree = void 0;
const Deferred_js_1 = require("../util/Deferred.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
*/
class FrameTree {
#frames = new Map();
// frameID -> parentFrameID
#parentIds = new Map();
// frameID -> childFrameIDs
#childIds = new Map();
#mainFrame;
#isMainFrameStale = false;
#waitRequests = new Map();
getMainFrame() {
return this.#mainFrame;
}
getById(frameId) {
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) {
const frame = this.getById(frameId);
if (frame) {
return Promise.resolve(frame);
}
const deferred = Deferred_js_1.Deferred.create();
const callbacks = this.#waitRequests.get(frameId) || new Set();
callbacks.add(deferred);
return deferred.valueOrThrow();
}
frames() {
return Array.from(this.#frames.values());
}
addFrame(frame) {
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 if (!this.#mainFrame || this.#isMainFrameStale) {
this.#mainFrame = frame;
this.#isMainFrameStale = false;
}
this.#waitRequests.get(frame._id)?.forEach(request => {
return request.resolve(frame);
});
}
removeFrame(frame) {
this.#frames.delete(frame._id);
this.#parentIds.delete(frame._id);
if (frame._parentId) {
this.#childIds.get(frame._parentId)?.delete(frame._id);
}
else {
this.#isMainFrameStale = true;
}
}
childFrames(frameId) {
const childIds = this.#childIds.get(frameId);
if (!childIds) {
return [];
}
return Array.from(childIds)
.map(id => {
return this.getById(id);
})
.filter((frame) => {
return frame !== undefined;
});
}
parentFrame(frameId) {
const parentId = this.#parentIds.get(frameId);
return parentId ? this.getById(parentId) : undefined;
}
}
exports.FrameTree = FrameTree;
//# sourceMappingURL=FrameTree.js.map