mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
a24cec20f9
This patch starts clicking in the center of the element area which is visible in a viewport. Fixes #103.
501 lines
14 KiB
JavaScript
501 lines
14 KiB
JavaScript
/**
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* Copyright 2017 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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let EventEmitter = require('events');
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let helper = require('./helper');
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class FrameManager extends EventEmitter {
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/**
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* @param {!Connection} client
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* @param {!Mouse} mouse
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* @return {!Promise<!FrameManager>}
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*/
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static async create(client, mouse) {
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let mainFramePayload = await client.send('Page.getResourceTree');
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return new FrameManager(client, mainFramePayload.frameTree, mouse);
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}
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/**
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* @param {!Connection} client
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* @param {!Object} frameTree
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* @param {!Mouse} mouse
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*/
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constructor(client, frameTree, mouse) {
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super();
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this._client = client;
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this._mouse = mouse;
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/** @type {!Map<string, !Frame>} */
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this._frames = new Map();
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this._mainFrame = this._addFramesRecursively(null, frameTree);
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/** @type {!Map<string, string>} */
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this._frameIdToExecutionContextId = new Map();
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this._client.on('Page.frameAttached', event => this._onFrameAttached(event.frameId, event.parentFrameId));
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this._client.on('Page.frameNavigated', event => this._onFrameNavigated(event.frame));
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this._client.on('Page.frameDetached', event => this._onFrameDetached(event.frameId));
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this._client.on('Runtime.executionContextCreated', event => this._onExecutionContextCreated(event.context));
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}
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/**
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* @return {!Frame}
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*/
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mainFrame() {
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return this._mainFrame;
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}
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/**
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* @return {!Array<!Frame>}
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*/
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frames() {
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return Array.from(this._frames.values());
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}
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/**
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* @param {string} frameId
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* @param {?string} parentFrameId
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* @return {?Frame}
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*/
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_onFrameAttached(frameId, parentFrameId) {
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if (this._frames.has(frameId))
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return;
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if (!parentFrameId) {
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// Navigation to the new backend process.
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this._navigateFrame(this._mainFrame, frameId, null);
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return;
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}
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let parentFrame = this._frames.get(parentFrameId);
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let frame = new Frame(this, parentFrame, frameId, null);
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this._frames.set(frame._id, frame);
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this.emit(FrameManager.Events.FrameAttached, frame);
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}
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/**
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* @param {!Object} framePayload
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*/
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_onFrameNavigated(framePayload) {
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let frame = this._frames.get(framePayload.id);
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if (!frame) {
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// Simulate missed "frameAttached" for a main frame navigation to the new backend process.
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console.assert(!framePayload.parentId, 'Main frame shouldn\'t have parent frame id.');
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frame = this._mainFrame;
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}
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this._navigateFrame(frame, framePayload.id, framePayload);
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}
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/**
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* @param {string} frameId
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*/
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_onFrameDetached(frameId) {
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let frame = this._frames.get(frameId);
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if (frame)
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this._removeFramesRecursively(frame);
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}
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_onExecutionContextCreated(context) {
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if (context.auxData && context.auxData.isDefault && context.auxData.frameId)
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this._frameIdToExecutionContextId.set(context.auxData.frameId, context.id);
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}
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/**
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* @param {!Frame} frame
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* @param {string} newFrameId
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* @param {?Object} newFramePayload
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*/
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_navigateFrame(frame, newFrameId, newFramePayload) {
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// Detach all child frames first.
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for (let child of frame.childFrames())
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this._removeFramesRecursively(child);
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this._frames.delete(frame._id, frame);
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this._frameIdToExecutionContextId.delete(frame._id);
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frame._id = newFrameId;
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frame._adoptPayload(newFramePayload);
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this._frames.set(newFrameId, frame);
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this.emit(FrameManager.Events.FrameNavigated, frame);
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}
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/**
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* @param {?Frame} parentFrame
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* @param {!Object} frameTreePayload
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* @return {!Frame}
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*/
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_addFramesRecursively(parentFrame, frameTreePayload) {
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let framePayload = frameTreePayload.frame;
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let frame = new Frame(this, parentFrame, framePayload.id, framePayload);
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this._frames.set(frame._id, frame);
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for (let i = 0; frameTreePayload.childFrames && i < frameTreePayload.childFrames.length; ++i)
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this._addFramesRecursively(frame, frameTreePayload.childFrames[i]);
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return frame;
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}
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/**
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* @param {!Frame} frame
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*/
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_removeFramesRecursively(frame) {
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for (let child of frame.childFrames())
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this._removeFramesRecursively(child);
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frame._detach();
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this._frames.delete(frame._id);
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this._frameIdToExecutionContextId.delete(frame._id);
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this.emit(FrameManager.Events.FrameDetached, frame);
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}
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/**
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* @param {!Frame} frame
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* @param {string} expression
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* @return {!Promise<(!Object|undefined)>}
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*/
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async _evaluateOnFrame(frame, expression) {
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let contextId = undefined;
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if (!frame.isMainFrame()) {
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contextId = this._frameIdToExecutionContextId.get(frame._id);
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console.assert(contextId, 'Frame does not have default context to evaluate in!');
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}
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expression = `Promise.resolve(${expression})`;
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let { exceptionDetails, result: remoteObject } = await this._client.send('Runtime.evaluate', { expression, contextId, returnByValue: false, awaitPromise: true });
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if (exceptionDetails)
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throw new Error('Evaluation failed: ' + helper.getExceptionMessage(exceptionDetails));
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return await helper.serializeRemoteObject(this._client, remoteObject);
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}
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}
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/** @enum {string} */
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FrameManager.Events = {
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FrameAttached: 'frameattached',
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FrameNavigated: 'framenavigated',
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FrameDetached: 'framedetached'
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};
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/**
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* @unrestricted
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*/
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class Frame {
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/**
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* @param {!FrameManager} frameManager
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* @param {?Frame} parentFrame
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* @param {string} frameId
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* @param {?Object} payload
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*/
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constructor(frameManager, parentFrame, frameId, payload) {
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this._frameManager = frameManager;
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this._parentFrame = parentFrame;
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this._url = '';
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this._id = frameId;
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/** @type {!Set<!WaitTask>} */
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this._waitTasks = new Set();
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this._adoptPayload(payload);
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/** @type {!Set<!Frame>} */
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this._childFrames = new Set();
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if (this._parentFrame)
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this._parentFrame._childFrames.add(this);
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}
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/**
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* @param {function()} pageFunction
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* @param {!Array<*>} args
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* @return {!Promise<(!Object|undefined)>}
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*/
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async evaluate(pageFunction, ...args) {
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return this._frameManager._evaluateOnFrame(this, helper.evaluationString(pageFunction, ...args));
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}
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/**
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* @return {string}
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*/
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name() {
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return this._name || '';
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}
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/**
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* @return {string}
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*/
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url() {
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return this._url;
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}
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/**
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* @return {?Frame}
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*/
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parentFrame() {
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return this._parentFrame;
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}
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/**
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* @return {!Array.<!Frame>}
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*/
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childFrames() {
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return Array.from(this._childFrames);
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}
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/**
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* @return {boolean}
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*/
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isMainFrame() {
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return !this._detached && !this._parentFrame;
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}
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/**
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* @return {boolean}
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*/
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isDetached() {
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return this._detached;
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}
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/**
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* @param {(string|number)} target
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* @param {!Object=} options
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* @return {!Promise}
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*/
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waitFor(target, options = {}) {
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if (typeof target === 'string' || target instanceof String)
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return this.waitForSelector(target, options);
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if (typeof target === 'number' || target instanceof Number)
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return new Promise(fulfill => setTimeout(fulfill, target));
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return Promise.reject(new Error('Unsupported target type: ' + (typeof target)));
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}
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/**
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* @param {string} selector
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* @param {!Object=} options
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* @return {!Promise}
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*/
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waitForSelector(selector, options = {}) {
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const timeout = options.timeout || 30000;
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const waitForVisible = !!options.visible;
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const pageScript = helper.evaluationString(waitForSelectorPageFunction, selector, waitForVisible, timeout);
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const waitTask = new WaitTask(this._frameManager, this, pageScript, timeout);
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this._waitTasks.add(waitTask);
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let cleanup = () => this._waitTasks.delete(waitTask);
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waitTask.promise.then(cleanup, cleanup);
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return waitTask.promise;
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}
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/**
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* @param {string} selector
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* @param {function(!Element):T} pageFunction
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* @param {!Array<*>} args
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* @return {!Promise<?T>}
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*/
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async $(selector, pageFunction, ...args) {
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let argsString = ['node'].concat(args.map(x => JSON.stringify(x))).join(',');
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let expression = `(()=>{
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let node = document.querySelector(${JSON.stringify(selector)});
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if (!node)
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return null;
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return (${pageFunction})(${argsString});
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})()`;
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return this._frameManager._evaluateOnFrame(this, expression);
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}
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/**
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* @param {string} selector
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* @param {function(!Element):T} pageFunction
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* @param {!Array<*>} args
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* @return {!Promise<!Array<T>>}
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*/
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async $$(selector, pageFunction, ...args) {
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let argsString = ['node, index'].concat(args.map(x => JSON.stringify(x))).join(',');
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let expression = `(()=>{
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let nodes = document.querySelectorAll(${JSON.stringify(selector)});
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return Array.prototype.map.call(nodes, (node, index) => (${pageFunction})(${argsString}));
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})()`;
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return this._frameManager._evaluateOnFrame(this, expression);
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}
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/**
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* @param {string} selector
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* @return {!Promise}
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*/
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async hover(selector) {
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let center = await this.evaluate(selector => {
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let element = document.querySelector(selector);
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if (!element)
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return null;
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element.scrollIntoViewIfNeeded();
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let rect = element.getBoundingClientRect();
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return {
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x: (Math.max(rect.left, 0) + Math.min(rect.right, window.innerWidth)) / 2,
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y: (Math.max(rect.top, 0) + Math.min(rect.bottom, window.innerHeight)) / 2
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};
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}, selector);
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if (!center)
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throw new Error('No node found for selector: ' + selector);
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await this._frameManager._mouse.move(center.x, center.y);
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}
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/**
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* @param {string} selector
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* @param {!Object=} options
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* @return {!Promise}
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*/
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async click(selector, options) {
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await this.hover(selector);
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await this._frameManager._mouse.press(options);
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// This is a hack for now, to make clicking less race-prone
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await this.evaluate(() => new Promise(f => requestAnimationFrame(f)));
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}
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/**
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* @param {?Object} framePayload
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*/
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_adoptPayload(framePayload) {
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framePayload = framePayload || {
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name: '',
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url: '',
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};
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this._name = framePayload.name;
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this._url = framePayload.url;
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for (let waitTask of this._waitTasks)
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waitTask.run();
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}
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_detach() {
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for (let waitTask of this._waitTasks)
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waitTask.terminate(new Error('waitForSelector failed: frame got detached.'));
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this._detached = true;
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if (this._parentFrame)
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this._parentFrame._childFrames.delete(this);
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this._parentFrame = null;
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}
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}
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helper.tracePublicAPI(Frame);
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class WaitTask {
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/**
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* @param {!FrameManager} frameManager
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* @param {!Frame} frame
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* @param {string} pageScript
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* @param {number} timeout
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*/
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constructor(frameManager, frame, pageScript, timeout) {
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this._frameManager = frameManager;
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this._frame = frame;
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this._pageScript = pageScript;
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this._runningTask = null;
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this.promise = new Promise((resolve, reject) => {
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this._resolve = resolve;
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this._reject = reject;
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});
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// Since page navigation requires us to re-install the pageScript, we should track
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// timeout on our end.
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this._timeoutTimer = setTimeout(() => this.terminate(new Error(`waiting failed: timeout ${timeout}ms exceeded`)), timeout);
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this.run();
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}
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/**
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* @param {!Error} error
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*/
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terminate(error) {
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this._reject(error);
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this._cleanup();
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}
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run() {
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let runningTask = this._frameManager._evaluateOnFrame(this._frame, this._pageScript).then(finish.bind(this), finish.bind(this, false));
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this._runningTask = runningTask;
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/**
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* @param {boolean} success
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* @param {?Error=} error
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*/
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function finish(success, error) {
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if (runningTask !== this._runningTask)
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return;
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// Ignore timeouts in pageScript - we track timeouts ourselves.
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if (!success && !error)
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return;
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if (error)
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this._reject(error);
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else
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this._resolve();
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this._cleanup();
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}
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}
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_cleanup() {
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clearTimeout(this._timeoutTimer);
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this._runningTask = null;
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}
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}
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/**
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* @param {string} selector
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* @param {boolean} waitForVisible
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* @param {number} timeout
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* @return {!Promise<boolean>}
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*/
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function waitForSelectorPageFunction(selector, visible, timeout) {
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const resultPromise = visible ? waitForVisible(selector) : waitInDOM(selector);
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const timeoutPromise = new Promise(fulfill => setTimeout(fulfill, timeout));
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return Promise.race([
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resultPromise.then(() => true),
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timeoutPromise.then(() => false)
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]);
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/**
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* @param {string} selector
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* @return {!Promise<!Element>}
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*/
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function waitInDOM(selector) {
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let node = document.querySelector(selector);
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if (node)
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return Promise.resolve(node);
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let fulfill;
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const result = new Promise(x => fulfill = x);
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const observer = new MutationObserver(mutations => {
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const node = document.querySelector(selector);
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if (node) {
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observer.disconnect();
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fulfill(node);
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}
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});
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observer.observe(document, {
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childList: true,
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subtree: true
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});
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return result;
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}
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/**
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* @param {string} selector
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* @return {!Promise<!Element>}
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*/
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async function waitForVisible(selector) {
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let fulfill;
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const result = new Promise(x => fulfill = x);
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onRaf();
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return result;
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async function onRaf() {
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const node = await waitInDOM(selector);
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const style = window.getComputedStyle(node);
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if (style.display === 'none' || style.visibility === 'hidden') {
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requestAnimationFrame(onRaf);
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return;
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}
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fulfill(node);
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}
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}
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}
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module.exports = FrameManager;
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