puppeteer-core
Version:
A high-level API to control headless Chrome over the DevTools Protocol
100 lines • 3.53 kB
JavaScript
/**
* @license
* Copyright 2023 Google Inc.
* SPDX-License-Identifier: Apache-2.0
*/
import { tokenize, TOKENS, stringify, } from '../../third_party/parsel-js/parsel-js.js';
TOKENS['nesting'] = /&/g;
TOKENS['combinator'] = /\s*(>>>>?|[\s>+~])\s*/g;
const ESCAPE_REGEXP = /\\[\s\S]/g;
const unquote = (text) => {
if (text.length <= 1) {
return text;
}
if ((text[0] === '"' || text[0] === "'") && text.endsWith(text[0])) {
text = text.slice(1, -1);
}
return text.replace(ESCAPE_REGEXP, match => {
return match[1];
});
};
/**
* @internal
*/
export function parsePSelectors(selector) {
let isPureCSS = true;
let hasAria = false;
let hasPseudoClasses = false;
const tokens = tokenize(selector);
if (tokens.length === 0) {
return [[], isPureCSS, hasPseudoClasses, false];
}
let compoundSelector = [];
let complexSelector = [compoundSelector];
const selectors = [complexSelector];
const storage = [];
for (const token of tokens) {
switch (token.type) {
case 'combinator':
switch (token.content) {
case ">>>" /* PCombinator.Descendent */:
isPureCSS = false;
if (storage.length) {
compoundSelector.push(stringify(storage));
storage.splice(0);
}
compoundSelector = [];
complexSelector.push(">>>" /* PCombinator.Descendent */);
complexSelector.push(compoundSelector);
continue;
case ">>>>" /* PCombinator.Child */:
isPureCSS = false;
if (storage.length) {
compoundSelector.push(stringify(storage));
storage.splice(0);
}
compoundSelector = [];
complexSelector.push(">>>>" /* PCombinator.Child */);
complexSelector.push(compoundSelector);
continue;
}
break;
case 'pseudo-element':
if (!token.name.startsWith('-p-')) {
break;
}
isPureCSS = false;
if (storage.length) {
compoundSelector.push(stringify(storage));
storage.splice(0);
}
const name = token.name.slice(3);
if (name === 'aria') {
hasAria = true;
}
compoundSelector.push({
name,
value: unquote(token.argument ?? ''),
});
continue;
case 'pseudo-class':
hasPseudoClasses = true;
break;
case 'comma':
if (storage.length) {
compoundSelector.push(stringify(storage));
storage.splice(0);
}
compoundSelector = [];
complexSelector = [compoundSelector];
selectors.push(complexSelector);
continue;
}
storage.push(token);
}
if (storage.length) {
compoundSelector.push(stringify(storage));
}
return [selectors, isPureCSS, hasPseudoClasses, hasAria];
}
//# sourceMappingURL=PSelectorParser.js.map