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injectedScript.ts
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injectedScript.ts
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/**
* Copyright (c) Microsoft Corporation.
*
* 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 { SelectorEngine, SelectorRoot } from './selectorEngine';
import { XPathEngine } from './xpathSelectorEngine';
import { ReactEngine } from './reactSelectorEngine';
import { VueEngine } from './vueSelectorEngine';
import { ParsedSelector, ParsedSelectorPart, parseSelector, stringifySelector } from '../common/selectorParser';
import { SelectorEvaluatorImpl, isVisible, parentElementOrShadowHost, elementMatchesText, TextMatcher, createRegexTextMatcher, createStrictTextMatcher, createLaxTextMatcher } from './selectorEvaluator';
import { CSSComplexSelectorList } from '../common/cssParser';
import { generateSelector } from './selectorGenerator';
import type * as channels from '../../protocol/channels';
type Predicate<T> = (progress: InjectedScriptProgress) => T | symbol;
export type InjectedScriptProgress = {
injectedScript: InjectedScript;
continuePolling: symbol;
aborted: boolean;
log: (message: string) => void;
logRepeating: (message: string) => void;
setIntermediateResult: (intermediateResult: any) => void;
};
export type LogEntry = {
message?: string;
intermediateResult?: string;
};
export type FrameExpectParams = Omit<channels.FrameExpectParams, 'expectedValue'> & { expectedValue?: any };
export type InjectedScriptPoll<T> = {
run: () => Promise<T>,
// Takes more logs, waiting until at least one message is available.
takeNextLogs: () => Promise<LogEntry[]>,
// Takes all current logs without waiting.
takeLastLogs: () => LogEntry[],
cancel: () => void,
};
export type ElementStateWithoutStable = 'visible' | 'hidden' | 'enabled' | 'disabled' | 'editable' | 'checked';
export type ElementState = ElementStateWithoutStable | 'stable';
export interface SelectorEngineV2 {
queryAll(root: SelectorRoot, body: any): Element[];
}
export type ElementMatch = {
element: Element;
capture: Element | undefined;
};
export type HitTargetInterceptionResult = {
stop: () => 'done' | { hitTargetDescription: string };
};
export class InjectedScript {
private _engines: Map<string, SelectorEngineV2>;
_evaluator: SelectorEvaluatorImpl;
private _stableRafCount: number;
private _browserName: string;
onGlobalListenersRemoved = new Set<() => void>();
private _hitTargetInterceptor: undefined | ((event: MouseEvent | PointerEvent | TouchEvent) => void);
constructor(stableRafCount: number, browserName: string, customEngines: { name: string, engine: SelectorEngine}[]) {
this._evaluator = new SelectorEvaluatorImpl(new Map());
this._engines = new Map();
this._engines.set('xpath', XPathEngine);
this._engines.set('xpath:light', XPathEngine);
this._engines.set('_react', ReactEngine);
this._engines.set('_vue', VueEngine);
this._engines.set('text', this._createTextEngine(true));
this._engines.set('text:light', this._createTextEngine(false));
this._engines.set('id', this._createAttributeEngine('id', true));
this._engines.set('id:light', this._createAttributeEngine('id', false));
this._engines.set('data-testid', this._createAttributeEngine('data-testid', true));
this._engines.set('data-testid:light', this._createAttributeEngine('data-testid', false));
this._engines.set('data-test-id', this._createAttributeEngine('data-test-id', true));
this._engines.set('data-test-id:light', this._createAttributeEngine('data-test-id', false));
this._engines.set('data-test', this._createAttributeEngine('data-test', true));
this._engines.set('data-test:light', this._createAttributeEngine('data-test', false));
this._engines.set('css', this._createCSSEngine());
this._engines.set('nth', { queryAll: () => [] });
this._engines.set('visible', { queryAll: () => [] });
this._engines.set('control', this._createControlEngine());
for (const { name, engine } of customEngines)
this._engines.set(name, engine);
this._stableRafCount = stableRafCount;
this._browserName = browserName;
this._setupGlobalListenersRemovalDetection();
this._setupHitTargetInterceptors();
}
eval(expression: string): any {
return global.eval(expression);
}
parseSelector(selector: string): ParsedSelector {
const result = parseSelector(selector);
for (const part of result.parts) {
if (!this._engines.has(part.name))
throw this.createStacklessError(`Unknown engine "${part.name}" while parsing selector ${selector}`);
}
return result;
}
querySelector(selector: ParsedSelector, root: Node, strict: boolean): Element | undefined {
if (!(root as any)['querySelector'])
throw this.createStacklessError('Node is not queryable.');
this._evaluator.begin();
try {
const result = this._querySelectorRecursively([{ element: root as Element, capture: undefined }], selector, 0, new Map());
if (strict && result.length > 1)
throw this.strictModeViolationError(selector, result.map(r => r.element));
return result[0]?.capture || result[0]?.element;
} finally {
this._evaluator.end();
}
}
private _querySelectorRecursively(roots: ElementMatch[], selector: ParsedSelector, index: number, queryCache: Map<Element, Element[][]>): ElementMatch[] {
if (index === selector.parts.length)
return roots;
const part = selector.parts[index];
if (part.name === 'nth') {
let filtered: ElementMatch[] = [];
if (part.body === '0') {
filtered = roots.slice(0, 1);
} else if (part.body === '-1') {
if (roots.length)
filtered = roots.slice(roots.length - 1);
} else {
if (typeof selector.capture === 'number')
throw this.createStacklessError(`Can't query n-th element in a request with the capture.`);
const nth = +part.body;
const set = new Set<Element>();
for (const root of roots) {
set.add(root.element);
if (nth + 1 === set.size)
filtered = [root];
}
}
return this._querySelectorRecursively(filtered, selector, index + 1, queryCache);
}
if (part.name === 'visible') {
const visible = Boolean(part.body);
const filtered = roots.filter(match => visible === isVisible(match.element));
return this._querySelectorRecursively(filtered, selector, index + 1, queryCache);
}
const result: ElementMatch[] = [];
for (const root of roots) {
const capture = index - 1 === selector.capture ? root.element : root.capture;
// Do not query engine twice for the same element.
let queryResults = queryCache.get(root.element);
if (!queryResults) {
queryResults = [];
queryCache.set(root.element, queryResults);
}
let all = queryResults[index];
if (!all) {
all = this._queryEngineAll(selector.parts[index], root.element);
queryResults[index] = all;
}
for (const element of all) {
if (!('nodeName' in element))
throw this.createStacklessError(`Expected a Node but got ${Object.prototype.toString.call(element)}`);
result.push({ element, capture });
}
}
return this._querySelectorRecursively(result, selector, index + 1, queryCache);
}
querySelectorAll(selector: ParsedSelector, root: Node): Element[] {
if (!(root as any)['querySelectorAll'])
throw this.createStacklessError('Node is not queryable.');
this._evaluator.begin();
try {
const result = this._querySelectorRecursively([{ element: root as Element, capture: undefined }], selector, 0, new Map());
const set = new Set<Element>();
for (const r of result)
set.add(r.capture || r.element);
return [...set];
} finally {
this._evaluator.end();
}
}
private _queryEngineAll(part: ParsedSelectorPart, root: SelectorRoot): Element[] {
return this._engines.get(part.name)!.queryAll(root, part.body);
}
private _createAttributeEngine(attribute: string, shadow: boolean): SelectorEngine {
const toCSS = (selector: string): CSSComplexSelectorList => {
const css = `[${attribute}=${JSON.stringify(selector)}]`;
return [{ simples: [{ selector: { css, functions: [] }, combinator: '' }] }];
};
return {
queryAll: (root: SelectorRoot, selector: string): Element[] => {
return this._evaluator.query({ scope: root as Document | Element, pierceShadow: shadow }, toCSS(selector));
}
};
}
private _createCSSEngine(): SelectorEngineV2 {
const evaluator = this._evaluator;
return {
queryAll(root: SelectorRoot, body: any) {
return evaluator.query({ scope: root as Document | Element, pierceShadow: true }, body);
}
};
}
private _createTextEngine(shadow: boolean): SelectorEngine {
const queryList = (root: SelectorRoot, selector: string): Element[] => {
const { matcher, kind } = createTextMatcher(selector);
const result: Element[] = [];
let lastDidNotMatchSelf: Element | null = null;
const appendElement = (element: Element) => {
// TODO: replace contains() with something shadow-dom-aware?
if (kind === 'lax' && lastDidNotMatchSelf && lastDidNotMatchSelf.contains(element))
return false;
const matches = elementMatchesText(this._evaluator, element, matcher);
if (matches === 'none')
lastDidNotMatchSelf = element;
if (matches === 'self' || (matches === 'selfAndChildren' && kind === 'strict'))
result.push(element);
};
if (root.nodeType === Node.ELEMENT_NODE)
appendElement(root as Element);
const elements = this._evaluator._queryCSS({ scope: root as Document | Element, pierceShadow: shadow }, '*');
for (const element of elements)
appendElement(element);
return result;
};
return {
queryAll: (root: SelectorRoot, selector: string): Element[] => {
return queryList(root, selector);
}
};
}
private _createControlEngine(): SelectorEngineV2 {
return {
queryAll(root: SelectorRoot, body: any) {
if (body === 'enter-frame')
return [];
if (body === 'return-empty')
return [];
throw new Error(`Internal error, unknown control selector ${body}`);
}
};
}
extend(source: string, params: any): any {
const constrFunction = global.eval(`
(() => {
${source}
return pwExport;
})()`);
return new constrFunction(this, params);
}
isVisible(element: Element): boolean {
return isVisible(element);
}
pollRaf<T>(predicate: Predicate<T>): InjectedScriptPoll<T> {
return this.poll(predicate, next => requestAnimationFrame(next));
}
pollInterval<T>(pollInterval: number, predicate: Predicate<T>): InjectedScriptPoll<T> {
return this.poll(predicate, next => setTimeout(next, pollInterval));
}
pollLogScale<T>(predicate: Predicate<T>): InjectedScriptPoll<T> {
const pollIntervals = [100, 250, 500];
let attempts = 0;
return this.poll(predicate, next => setTimeout(next, pollIntervals[attempts++] || 1000));
}
poll<T>(predicate: Predicate<T>, scheduleNext: (next: () => void) => void): InjectedScriptPoll<T> {
return this._runAbortableTask(progress => {
let fulfill: (result: T) => void;
let reject: (error: Error) => void;
const result = new Promise<T>((f, r) => { fulfill = f; reject = r; });
const next = () => {
if (progress.aborted)
return;
try {
const success = predicate(progress);
if (success !== progress.continuePolling)
fulfill(success as T);
else
scheduleNext(next);
} catch (e) {
progress.log(' ' + e.message);
reject(e);
}
};
next();
return result;
});
}
private _runAbortableTask<T>(task: (progess: InjectedScriptProgress) => Promise<T>): InjectedScriptPoll<T> {
let unsentLog: LogEntry[] = [];
let takeNextLogsCallback: ((logs: LogEntry[]) => void) | undefined;
let taskFinished = false;
const logReady = () => {
if (!takeNextLogsCallback)
return;
takeNextLogsCallback(unsentLog);
unsentLog = [];
takeNextLogsCallback = undefined;
};
const takeNextLogs = () => new Promise<LogEntry[]>(fulfill => {
takeNextLogsCallback = fulfill;
if (unsentLog.length || taskFinished)
logReady();
});
let lastMessage = '';
let lastIntermediateResult: any = undefined;
const progress: InjectedScriptProgress = {
injectedScript: this,
aborted: false,
continuePolling: Symbol('continuePolling'),
log: (message: string) => {
lastMessage = message;
unsentLog.push({ message });
logReady();
},
logRepeating: (message: string) => {
if (message !== lastMessage)
progress.log(message);
},
setIntermediateResult: (intermediateResult: any) => {
if (lastIntermediateResult === intermediateResult)
return;
lastIntermediateResult = intermediateResult;
unsentLog.push({ intermediateResult });
logReady();
},
};
const run = () => {
const result = task(progress);
// After the task has finished, there should be no more logs.
// Release any pending `takeNextLogs` call, and do not block any future ones.
// This prevents non-finished protocol evaluation calls and memory leaks.
result.finally(() => {
taskFinished = true;
logReady();
});
return result;
};
return {
takeNextLogs,
run,
cancel: () => { progress.aborted = true; },
takeLastLogs: () => unsentLog,
};
}
getElementBorderWidth(node: Node): { left: number; top: number; } {
if (node.nodeType !== Node.ELEMENT_NODE || !node.ownerDocument || !node.ownerDocument.defaultView)
return { left: 0, top: 0 };
const style = node.ownerDocument.defaultView.getComputedStyle(node as Element);
return { left: parseInt(style.borderLeftWidth || '', 10), top: parseInt(style.borderTopWidth || '', 10) };
}
retarget(node: Node, behavior: 'follow-label' | 'no-follow-label'): Element | null {
let element = node.nodeType === Node.ELEMENT_NODE ? node as Element : node.parentElement;
if (!element)
return null;
if (!element.matches('input, textarea, select'))
element = element.closest('button, [role=button], [role=checkbox], [role=radio]') || element;
if (behavior === 'follow-label') {
if (!element.matches('input, textarea, button, select, [role=button], [role=checkbox], [role=radio]') &&
!(element as any).isContentEditable) {
// Go up to the label that might be connected to the input/textarea.
element = element.closest('label') || element;
}
if (element.nodeName === 'LABEL')
element = (element as HTMLLabelElement).control || element;
}
return element;
}
waitForElementStatesAndPerformAction<T>(node: Node, states: ElementState[], force: boolean | undefined,
callback: (node: Node, progress: InjectedScriptProgress) => T | symbol): InjectedScriptPoll<T | 'error:notconnected'> {
let lastRect: { x: number, y: number, width: number, height: number } | undefined;
let counter = 0;
let samePositionCounter = 0;
let lastTime = 0;
return this.pollRaf(progress => {
if (force) {
progress.log(` forcing action`);
return callback(node, progress);
}
for (const state of states) {
if (state !== 'stable') {
const result = this.elementState(node, state);
if (typeof result !== 'boolean')
return result;
if (!result) {
progress.logRepeating(` element is not ${state} - waiting...`);
return progress.continuePolling;
}
continue;
}
const element = this.retarget(node, 'no-follow-label');
if (!element)
return 'error:notconnected';
// First raf happens in the same animation frame as evaluation, so it does not produce
// any client rect difference compared to synchronous call. We skip the synchronous call
// and only force layout during actual rafs as a small optimisation.
if (++counter === 1)
return progress.continuePolling;
// Drop frames that are shorter than 16ms - WebKit Win bug.
const time = performance.now();
if (this._stableRafCount > 1 && time - lastTime < 15)
return progress.continuePolling;
lastTime = time;
const clientRect = element.getBoundingClientRect();
const rect = { x: clientRect.top, y: clientRect.left, width: clientRect.width, height: clientRect.height };
const samePosition = lastRect && rect.x === lastRect.x && rect.y === lastRect.y && rect.width === lastRect.width && rect.height === lastRect.height;
if (samePosition)
++samePositionCounter;
else
samePositionCounter = 0;
const isStable = samePositionCounter >= this._stableRafCount;
const isStableForLogs = isStable || !lastRect;
lastRect = rect;
if (!isStableForLogs)
progress.logRepeating(` element is not stable - waiting...`);
if (!isStable)
return progress.continuePolling;
}
return callback(node, progress);
});
}
elementState(node: Node, state: ElementStateWithoutStable): boolean | 'error:notconnected' {
const element = this.retarget(node, ['stable', 'visible', 'hidden'].includes(state) ? 'no-follow-label' : 'follow-label');
if (!element || !element.isConnected) {
if (state === 'hidden')
return true;
return 'error:notconnected';
}
if (state === 'visible')
return this.isVisible(element);
if (state === 'hidden')
return !this.isVisible(element);
const disabled = isElementDisabled(element);
if (state === 'disabled')
return disabled;
if (state === 'enabled')
return !disabled;
const editable = !(['INPUT', 'TEXTAREA', 'SELECT'].includes(element.nodeName) && element.hasAttribute('readonly'));
if (state === 'editable')
return !disabled && editable;
if (state === 'checked') {
if (['checkbox', 'radio'].includes(element.getAttribute('role') || ''))
return element.getAttribute('aria-checked') === 'true';
if (element.nodeName !== 'INPUT')
throw this.createStacklessError('Not a checkbox or radio button');
if (!['radio', 'checkbox'].includes((element as HTMLInputElement).type.toLowerCase()))
throw this.createStacklessError('Not a checkbox or radio button');
return (element as HTMLInputElement).checked;
}
throw this.createStacklessError(`Unexpected element state "${state}"`);
}
selectOptions(optionsToSelect: (Node | { value?: string, label?: string, index?: number })[],
node: Node, progress: InjectedScriptProgress): string[] | 'error:notconnected' | symbol {
const element = this.retarget(node, 'follow-label');
if (!element)
return 'error:notconnected';
if (element.nodeName.toLowerCase() !== 'select')
throw this.createStacklessError('Element is not a <select> element');
const select = element as HTMLSelectElement;
const options = [...select.options];
const selectedOptions = [];
let remainingOptionsToSelect = optionsToSelect.slice();
for (let index = 0; index < options.length; index++) {
const option = options[index];
const filter = (optionToSelect: Node | { value?: string, label?: string, index?: number }) => {
if (optionToSelect instanceof Node)
return option === optionToSelect;
let matches = true;
if (optionToSelect.value !== undefined)
matches = matches && optionToSelect.value === option.value;
if (optionToSelect.label !== undefined)
matches = matches && optionToSelect.label === option.label;
if (optionToSelect.index !== undefined)
matches = matches && optionToSelect.index === index;
return matches;
};
if (!remainingOptionsToSelect.some(filter))
continue;
selectedOptions.push(option);
if (select.multiple) {
remainingOptionsToSelect = remainingOptionsToSelect.filter(o => !filter(o));
} else {
remainingOptionsToSelect = [];
break;
}
}
if (remainingOptionsToSelect.length) {
progress.logRepeating(' did not find some options - waiting... ');
return progress.continuePolling;
}
select.value = undefined as any;
selectedOptions.forEach(option => option.selected = true);
progress.log(' selected specified option(s)');
select.dispatchEvent(new Event('input', { 'bubbles': true }));
select.dispatchEvent(new Event('change', { 'bubbles': true }));
return selectedOptions.map(option => option.value);
}
fill(value: string, node: Node, progress: InjectedScriptProgress): 'error:notconnected' | 'needsinput' | 'done' {
const element = this.retarget(node, 'follow-label');
if (!element)
return 'error:notconnected';
if (element.nodeName.toLowerCase() === 'input') {
const input = element as HTMLInputElement;
const type = input.type.toLowerCase();
const kDateTypes = new Set(['date', 'time', 'datetime', 'datetime-local', 'month', 'week']);
const kTextInputTypes = new Set(['', 'email', 'number', 'password', 'search', 'tel', 'text', 'url']);
if (!kTextInputTypes.has(type) && !kDateTypes.has(type)) {
progress.log(` input of type "${type}" cannot be filled`);
throw this.createStacklessError(`Input of type "${type}" cannot be filled`);
}
if (type === 'number') {
value = value.trim();
if (isNaN(Number(value)))
throw this.createStacklessError('Cannot type text into input[type=number]');
}
if (kDateTypes.has(type)) {
value = value.trim();
input.focus();
input.value = value;
if (input.value !== value)
throw this.createStacklessError('Malformed value');
element.dispatchEvent(new Event('input', { 'bubbles': true }));
element.dispatchEvent(new Event('change', { 'bubbles': true }));
return 'done'; // We have already changed the value, no need to input it.
}
} else if (element.nodeName.toLowerCase() === 'textarea') {
// Nothing to check here.
} else if (!(element as HTMLElement).isContentEditable) {
throw this.createStacklessError('Element is not an <input>, <textarea> or [contenteditable] element');
}
this.selectText(element);
return 'needsinput'; // Still need to input the value.
}
selectText(node: Node): 'error:notconnected' | 'done' {
const element = this.retarget(node, 'follow-label');
if (!element)
return 'error:notconnected';
if (element.nodeName.toLowerCase() === 'input') {
const input = element as HTMLInputElement;
input.select();
input.focus();
return 'done';
}
if (element.nodeName.toLowerCase() === 'textarea') {
const textarea = element as HTMLTextAreaElement;
textarea.selectionStart = 0;
textarea.selectionEnd = textarea.value.length;
textarea.focus();
return 'done';
}
const range = element.ownerDocument.createRange();
range.selectNodeContents(element);
const selection = element.ownerDocument.defaultView!.getSelection();
if (selection) {
selection.removeAllRanges();
selection.addRange(range);
}
(element as HTMLElement | SVGElement).focus();
return 'done';
}
focusNode(node: Node, resetSelectionIfNotFocused?: boolean): 'error:notconnected' | 'done' {
if (!node.isConnected)
return 'error:notconnected';
if (node.nodeType !== Node.ELEMENT_NODE)
throw this.createStacklessError('Node is not an element');
const wasFocused = (node.getRootNode() as (Document | ShadowRoot)).activeElement === node && node.ownerDocument && node.ownerDocument.hasFocus();
(node as HTMLElement | SVGElement).focus();
if (resetSelectionIfNotFocused && !wasFocused && node.nodeName.toLowerCase() === 'input') {
try {
const input = node as HTMLInputElement;
input.setSelectionRange(0, 0);
} catch (e) {
// Some inputs do not allow selection.
}
}
return 'done';
}
setInputFiles(node: Node, payloads: { name: string, mimeType: string, buffer: string }[]) {
if (node.nodeType !== Node.ELEMENT_NODE)
return 'Node is not of type HTMLElement';
const element: Element | undefined = node as Element;
if (element.nodeName !== 'INPUT')
return 'Not an <input> element';
const input = element as HTMLInputElement;
const type = (input.getAttribute('type') || '').toLowerCase();
if (type !== 'file')
return 'Not an input[type=file] element';
const files = payloads.map(file => {
const bytes = Uint8Array.from(atob(file.buffer), c => c.charCodeAt(0));
return new File([bytes], file.name, { type: file.mimeType });
});
const dt = new DataTransfer();
for (const file of files)
dt.items.add(file);
input.files = dt.files;
input.dispatchEvent(new Event('input', { 'bubbles': true }));
input.dispatchEvent(new Event('change', { 'bubbles': true }));
}
checkHitTargetAt(node: Node, point: { x: number, y: number }): 'error:notconnected' | 'done' | { hitTargetDescription: string } {
let element: Element | null | undefined = node.nodeType === Node.ELEMENT_NODE ? (node as Element) : node.parentElement;
if (!element || !element.isConnected)
return 'error:notconnected';
element = element.closest('button, [role=button]') || element;
const hitElement = this.deepElementFromPoint(document, point.x, point.y);
return this._expectHitTargetParent(hitElement, element);
}
private _expectHitTargetParent(hitElement: Element | undefined, targetElement: Element) {
const hitParents: Element[] = [];
while (hitElement && hitElement !== targetElement) {
hitParents.push(hitElement);
hitElement = parentElementOrShadowHost(hitElement);
}
if (hitElement === targetElement)
return 'done';
const hitTargetDescription = this.previewNode(hitParents[0] || document.documentElement);
// Root is the topmost element in the hitTarget's chain that is not in the
// element's chain. For example, it might be a dialog element that overlays
// the target.
let rootHitTargetDescription: string | undefined;
let element: Element | undefined = targetElement;
while (element) {
const index = hitParents.indexOf(element);
if (index !== -1) {
if (index > 1)
rootHitTargetDescription = this.previewNode(hitParents[index - 1]);
break;
}
element = parentElementOrShadowHost(element);
}
if (rootHitTargetDescription)
return { hitTargetDescription: `${hitTargetDescription} from ${rootHitTargetDescription} subtree` };
return { hitTargetDescription };
}
setupHitTargetInterceptor(node: Node, action: 'hover' | 'tap' | 'mouse', blockAllEvents: boolean): HitTargetInterceptionResult | 'error:notconnected' {
const maybeElement: Element | null | undefined = node.nodeType === Node.ELEMENT_NODE ? (node as Element) : node.parentElement;
if (!maybeElement || !maybeElement.isConnected)
return 'error:notconnected';
const element = maybeElement.closest('button, [role=button]') || maybeElement;
const events = {
'hover': kHoverHitTargetInterceptorEvents,
'tap': kTapHitTargetInterceptorEvents,
'mouse': kMouseHitTargetInterceptorEvents,
}[action];
let result: 'done' | { hitTargetDescription: string } | undefined;
const listener = (event: PointerEvent | MouseEvent | TouchEvent) => {
// Ignore events that we do not expect to intercept.
if (!events.has(event.type))
return;
// Playwright only issues trusted events, so allow any custom events originating from
// the page or content scripts.
if (!event.isTrusted)
return;
// Element was detached during the action, for example in some event handler.
// If events before that were correctly pointing to it, consider this a valid scenario.
if (!element.isConnected)
return;
// Determine the event point. Note that Firefox does not always have window.TouchEvent.
const point = (!!window.TouchEvent && (event instanceof window.TouchEvent)) ? event.touches[0] : (event as MouseEvent | PointerEvent);
if (!!point && (result === undefined || result === 'done')) {
// Determine whether we hit the target element, unless we have already failed.
const hitElement = this.deepElementFromPoint(document, point.clientX, point.clientY);
result = this._expectHitTargetParent(hitElement, element);
}
if (blockAllEvents || result !== 'done') {
event.preventDefault();
event.stopPropagation();
event.stopImmediatePropagation();
}
};
const stop = () => {
if (this._hitTargetInterceptor === listener)
this._hitTargetInterceptor = undefined;
// If we did not get any events, consider things working. Possible causes:
// - JavaScript is disabled (webkit-only).
// - Some <iframe> overlays the element from another frame.
// - Hovering a disabled control prevents any events from firing.
return result || 'done';
};
// Note: this removes previous listener, just in case there are two concurrent clicks
// or something went wrong and we did not cleanup.
this._hitTargetInterceptor = listener;
return { stop };
}
dispatchEvent(node: Node, type: string, eventInit: Object) {
let event;
eventInit = { bubbles: true, cancelable: true, composed: true, ...eventInit };
switch (eventType.get(type)) {
case 'mouse': event = new MouseEvent(type, eventInit); break;
case 'keyboard': event = new KeyboardEvent(type, eventInit); break;
case 'touch': event = new TouchEvent(type, eventInit); break;
case 'pointer': event = new PointerEvent(type, eventInit); break;
case 'focus': event = new FocusEvent(type, eventInit); break;
case 'drag': event = new DragEvent(type, eventInit); break;
default: event = new Event(type, eventInit); break;
}
node.dispatchEvent(event);
}
deepElementFromPoint(document: Document, x: number, y: number): Element | undefined {
let container: Document | ShadowRoot | null = document;
let element: Element | undefined;
while (container) {
// elementFromPoint works incorrectly in Chromium (http://crbug.com/1188919),
// so we use elementsFromPoint instead.
const elements = (container as Document).elementsFromPoint(x, y);
const innerElement = elements[0] as Element | undefined;
if (!innerElement || element === innerElement)
break;
element = innerElement;
container = element.shadowRoot;
}
return element;
}
previewNode(node: Node): string {
if (node.nodeType === Node.TEXT_NODE)
return oneLine(`#text=${node.nodeValue || ''}`);
if (node.nodeType !== Node.ELEMENT_NODE)
return oneLine(`<${node.nodeName.toLowerCase()} />`);
const element = node as Element;
const attrs = [];
for (let i = 0; i < element.attributes.length; i++) {
const { name, value } = element.attributes[i];
if (name === 'style' || name.startsWith('__playwright'))
continue;
if (!value && booleanAttributes.has(name))
attrs.push(` ${name}`);
else
attrs.push(` ${name}="${value}"`);
}
attrs.sort((a, b) => a.length - b.length);
let attrText = attrs.join('');
if (attrText.length > 50)
attrText = attrText.substring(0, 49) + '\u2026';
if (autoClosingTags.has(element.nodeName))
return oneLine(`<${element.nodeName.toLowerCase()}${attrText}/>`);
const children = element.childNodes;
let onlyText = false;
if (children.length <= 5) {
onlyText = true;
for (let i = 0; i < children.length; i++)
onlyText = onlyText && children[i].nodeType === Node.TEXT_NODE;
}
let text = onlyText ? (element.textContent || '') : (children.length ? '\u2026' : '');
if (text.length > 50)
text = text.substring(0, 49) + '\u2026';
return oneLine(`<${element.nodeName.toLowerCase()}${attrText}>${text}</${element.nodeName.toLowerCase()}>`);
}
strictModeViolationError(selector: ParsedSelector, matches: Element[]): Error {
const infos = matches.slice(0, 10).map(m => ({
preview: this.previewNode(m),
selector: generateSelector(this, m).selector
}));
const lines = infos.map((info, i) => `\n ${i + 1}) ${info.preview} aka playwright.$("${info.selector}")`);
if (infos.length < matches.length)
lines.push('\n ...');
return this.createStacklessError(`strict mode violation: "${stringifySelector(selector)}" resolved to ${matches.length} elements:${lines.join('')}\n`);
}
createStacklessError(message: string): Error {
if (this._browserName === 'firefox') {
const error = new Error('Error: ' + message);
// Firefox cannot delete the stack, so assign to an empty string.
error.stack = '';
return error;
}
const error = new Error(message);
// Chromium/WebKit should delete the stack instead.
delete error.stack;
return error;
}
private _setupGlobalListenersRemovalDetection() {
const customEventName = '__playwright_global_listeners_check__';
let seenEvent = false;
const handleCustomEvent = () => seenEvent = true;
window.addEventListener(customEventName, handleCustomEvent);
new MutationObserver(entries => {
const newDocumentElement = entries.some(entry => Array.from(entry.addedNodes).includes(document.documentElement));
if (!newDocumentElement)
return;
// New documentElement - let's check whether listeners are still here.
seenEvent = false;
window.dispatchEvent(new CustomEvent(customEventName));
if (seenEvent)
return;
// Listener did not fire. Reattach the listener and notify.
window.addEventListener(customEventName, handleCustomEvent);
for (const callback of this.onGlobalListenersRemoved)
callback();
}).observe(document, { childList: true });
}
private _setupHitTargetInterceptors() {
const listener = (event: PointerEvent | MouseEvent | TouchEvent) => this._hitTargetInterceptor?.(event);
const addHitTargetInterceptorListeners = () => {
for (const event of kAllHitTargetInterceptorEvents)
window.addEventListener(event as any, listener, { capture: true, passive: false });
};
addHitTargetInterceptorListeners();
this.onGlobalListenersRemoved.add(addHitTargetInterceptorListeners);
}
expectSingleElement(progress: InjectedScriptProgress, element: Element, options: FrameExpectParams): { matches: boolean, received?: any } {
const injected = progress.injectedScript;
const expression = options.expression;
{
// Element state / boolean values.
let elementState: boolean | 'error:notconnected' | 'error:notcheckbox' | undefined;
if (expression === 'to.be.checked') {
elementState = progress.injectedScript.elementState(element, 'checked');
} else if (expression === 'to.be.disabled') {
elementState = progress.injectedScript.elementState(element, 'disabled');
} else if (expression === 'to.be.editable') {
elementState = progress.injectedScript.elementState(element, 'editable');
} else if (expression === 'to.be.empty') {
if (element.nodeName === 'INPUT' || element.nodeName === 'TEXTAREA')
elementState = !(element as HTMLInputElement).value;
else
elementState = !element.textContent?.trim();
} else if (expression === 'to.be.enabled') {
elementState = progress.injectedScript.elementState(element, 'enabled');
} else if (expression === 'to.be.focused') {
elementState = document.activeElement === element;
} else if (expression === 'to.be.hidden') {
elementState = progress.injectedScript.elementState(element, 'hidden');
} else if (expression === 'to.be.visible') {
elementState = progress.injectedScript.elementState(element, 'visible');
}
if (elementState !== undefined) {
if (elementState === 'error:notcheckbox')
throw injected.createStacklessError('Element is not a checkbox');
if (elementState === 'error:notconnected')
throw injected.createStacklessError('Element is not connected');
return { received: elementState, matches: elementState };
}
}
{
// JS property
if (expression === 'to.have.property') {
const received = (element as any)[options.expressionArg];
const matches = deepEquals(received, options.expectedValue);
return { received, matches };
}
}
{
// Single text value.
let received: string | undefined;
if (expression === 'to.have.attribute') {
received = element.getAttribute(options.expressionArg) || '';
} else if (expression === 'to.have.class') {
received = element.className;
} else if (expression === 'to.have.css') {
received = (window.getComputedStyle(element) as any)[options.expressionArg];
} else if (expression === 'to.have.id') {
received = element.id;
} else if (expression === 'to.have.text') {
received = options.useInnerText ? (element as HTMLElement).innerText : element.textContent || '';
} else if (expression === 'to.have.title') {
received = document.title;
} else if (expression === 'to.have.url') {
received = document.location.href;
} else if (expression === 'to.have.value') {
if (element.nodeName !== 'INPUT' && element.nodeName !== 'TEXTAREA' && element.nodeName !== 'SELECT')
throw this.createStacklessError('Not an input element');
received = (element as any).value;
}
if (received !== undefined && options.expectedText) {
const matcher = new ExpectedTextMatcher(options.expectedText[0]);
return { received, matches: matcher.matches(received) };
}
}
throw this.createStacklessError('Unknown expect matcher: ' + expression);
}
expectArray(elements: Element[], options: FrameExpectParams): { matches: boolean, received?: any } {
const expression = options.expression;
if (expression === 'to.have.count') {
const received = elements.length;
const matches = received === options.expectedNumber;
return { received, matches };
}
// List of values.
let received: string[] | undefined;
if (expression === 'to.have.text.array' || expression === 'to.contain.text.array')
received = elements.map(e => options.useInnerText ? (e as HTMLElement).innerText : e.textContent || '');
else if (expression === 'to.have.class.array')
received = elements.map(e => e.className);
if (received && options.expectedText) {
// "To match an array" is "to contain an array" + "equal length"
const lengthShouldMatch = expression !== 'to.contain.text.array';
const matchesLength = received.length === options.expectedText.length || !lengthShouldMatch;
if (!matchesLength)
return { received, matches: false };
// Each matcher should get a "received" that matches it, in order.
let i = 0;
const matchers = options.expectedText.map(e => new ExpectedTextMatcher(e));
let allMatchesFound = true;
for (const matcher of matchers) {
while (i < received.length && !matcher.matches(received[i]))
i++;