builderman verion 0.1.0, initial commit/release.
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241
node_modules/cheerio-select/lib/esm/index.js
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241
node_modules/cheerio-select/lib/esm/index.js
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import { parse, SelectorType, isTraversal } from "css-what";
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import { _compileToken as compileToken, prepareContext, } from "css-select";
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import * as DomUtils from "domutils";
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import * as boolbase from "boolbase";
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import { getDocumentRoot, groupSelectors } from "./helpers.js";
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import { isFilter, getLimit, } from "./positionals.js";
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// Re-export pseudo extension points
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export { filters, pseudos, aliases } from "css-select";
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const UNIVERSAL_SELECTOR = {
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type: SelectorType.Universal,
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namespace: null,
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};
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const SCOPE_PSEUDO = {
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type: SelectorType.Pseudo,
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name: "scope",
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data: null,
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};
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export function is(element, selector, options = {}) {
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return some([element], selector, options);
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}
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export function some(elements, selector, options = {}) {
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if (typeof selector === "function")
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return elements.some(selector);
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const [plain, filtered] = groupSelectors(parse(selector));
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return ((plain.length > 0 && elements.some(compileToken(plain, options))) ||
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filtered.some((sel) => filterBySelector(sel, elements, options).length > 0));
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}
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function filterByPosition(filter, elems, data, options) {
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const num = typeof data === "string" ? parseInt(data, 10) : NaN;
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switch (filter) {
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case "first":
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case "lt":
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// Already done in `getLimit`
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return elems;
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case "last":
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return elems.length > 0 ? [elems[elems.length - 1]] : elems;
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case "nth":
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case "eq":
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return isFinite(num) && Math.abs(num) < elems.length
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? [num < 0 ? elems[elems.length + num] : elems[num]]
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: [];
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case "gt":
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return isFinite(num) ? elems.slice(num + 1) : [];
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case "even":
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return elems.filter((_, i) => i % 2 === 0);
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case "odd":
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return elems.filter((_, i) => i % 2 === 1);
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case "not": {
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const filtered = new Set(filterParsed(data, elems, options));
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return elems.filter((e) => !filtered.has(e));
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}
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}
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}
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export function filter(selector, elements, options = {}) {
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return filterParsed(parse(selector), elements, options);
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}
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/**
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* Filter a set of elements by a selector.
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*
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* Will return elements in the original order.
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*
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* @param selector Selector to filter by.
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* @param elements Elements to filter.
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* @param options Options for selector.
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*/
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function filterParsed(selector, elements, options) {
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if (elements.length === 0)
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return [];
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const [plainSelectors, filteredSelectors] = groupSelectors(selector);
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let found;
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if (plainSelectors.length) {
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const filtered = filterElements(elements, plainSelectors, options);
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// If there are no filters, just return
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if (filteredSelectors.length === 0) {
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return filtered;
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}
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// Otherwise, we have to do some filtering
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if (filtered.length) {
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found = new Set(filtered);
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}
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}
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for (let i = 0; i < filteredSelectors.length && (found === null || found === void 0 ? void 0 : found.size) !== elements.length; i++) {
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const filteredSelector = filteredSelectors[i];
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const missing = found
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? elements.filter((e) => DomUtils.isTag(e) && !found.has(e))
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: elements;
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if (missing.length === 0)
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break;
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const filtered = filterBySelector(filteredSelector, elements, options);
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if (filtered.length) {
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if (!found) {
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/*
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* If we haven't found anything before the last selector,
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* just return what we found now.
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*/
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if (i === filteredSelectors.length - 1) {
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return filtered;
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}
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found = new Set(filtered);
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}
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else {
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filtered.forEach((el) => found.add(el));
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}
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}
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}
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return typeof found !== "undefined"
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? (found.size === elements.length
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? elements
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: // Filter elements to preserve order
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elements.filter((el) => found.has(el)))
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: [];
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}
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function filterBySelector(selector, elements, options) {
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var _a;
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if (selector.some(isTraversal)) {
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/*
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* Get root node, run selector with the scope
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* set to all of our nodes.
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*/
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const root = (_a = options.root) !== null && _a !== void 0 ? _a : getDocumentRoot(elements[0]);
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const opts = { ...options, context: elements, relativeSelector: false };
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selector.push(SCOPE_PSEUDO);
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return findFilterElements(root, selector, opts, true, elements.length);
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}
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// Performance optimization: If we don't have to traverse, just filter set.
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return findFilterElements(elements, selector, options, false, elements.length);
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}
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export function select(selector, root, options = {}, limit = Infinity) {
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if (typeof selector === "function") {
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return find(root, selector);
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}
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const [plain, filtered] = groupSelectors(parse(selector));
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const results = filtered.map((sel) => findFilterElements(root, sel, options, true, limit));
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// Plain selectors can be queried in a single go
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if (plain.length) {
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results.push(findElements(root, plain, options, limit));
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}
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if (results.length === 0) {
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return [];
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}
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// If there was only a single selector, just return the result
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if (results.length === 1) {
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return results[0];
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}
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// Sort results, filtering for duplicates
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return DomUtils.uniqueSort(results.reduce((a, b) => [...a, ...b]));
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}
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/**
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*
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* @param root Element(s) to search from.
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* @param selector Selector to look for.
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* @param options Options for querying.
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* @param queryForSelector Query multiple levels deep for the initial selector, even if it doesn't contain a traversal.
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*/
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function findFilterElements(root, selector, options, queryForSelector, totalLimit) {
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const filterIndex = selector.findIndex(isFilter);
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const sub = selector.slice(0, filterIndex);
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const filter = selector[filterIndex];
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// If we are at the end of the selector, we can limit the number of elements to retrieve.
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const partLimit = selector.length - 1 === filterIndex ? totalLimit : Infinity;
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/*
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* Set the number of elements to retrieve.
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* Eg. for :first, we only have to get a single element.
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*/
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const limit = getLimit(filter.name, filter.data, partLimit);
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if (limit === 0)
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return [];
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/*
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* Skip `findElements` call if our selector starts with a positional
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* pseudo.
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*/
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const elemsNoLimit = sub.length === 0 && !Array.isArray(root)
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? DomUtils.getChildren(root).filter(DomUtils.isTag)
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: sub.length === 0
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? (Array.isArray(root) ? root : [root]).filter(DomUtils.isTag)
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: queryForSelector || sub.some(isTraversal)
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? findElements(root, [sub], options, limit)
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: filterElements(root, [sub], options);
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const elems = elemsNoLimit.slice(0, limit);
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let result = filterByPosition(filter.name, elems, filter.data, options);
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if (result.length === 0 || selector.length === filterIndex + 1) {
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return result;
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}
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const remainingSelector = selector.slice(filterIndex + 1);
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const remainingHasTraversal = remainingSelector.some(isTraversal);
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if (remainingHasTraversal) {
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if (isTraversal(remainingSelector[0])) {
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const { type } = remainingSelector[0];
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if (type === SelectorType.Sibling ||
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type === SelectorType.Adjacent) {
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// If we have a sibling traversal, we need to also look at the siblings.
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result = prepareContext(result, DomUtils, true);
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}
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// Avoid a traversal-first selector error.
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remainingSelector.unshift(UNIVERSAL_SELECTOR);
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}
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options = {
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...options,
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// Avoid absolutizing the selector
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relativeSelector: false,
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/*
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* Add a custom root func, to make sure traversals don't match elements
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* that aren't a part of the considered tree.
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*/
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rootFunc: (el) => result.includes(el),
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};
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}
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else if (options.rootFunc && options.rootFunc !== boolbase.trueFunc) {
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options = { ...options, rootFunc: boolbase.trueFunc };
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}
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/*
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* If we have another filter, recursively call `findFilterElements`,
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* with the `recursive` flag disabled. We only have to look for more
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* elements when we see a traversal.
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*
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* Otherwise,
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*/
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return remainingSelector.some(isFilter)
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? findFilterElements(result, remainingSelector, options, false, totalLimit)
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: remainingHasTraversal
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? // Query existing elements to resolve traversal.
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findElements(result, [remainingSelector], options, totalLimit)
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: // If we don't have any more traversals, simply filter elements.
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filterElements(result, [remainingSelector], options);
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}
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function findElements(root, sel, options, limit) {
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const query = compileToken(sel, options, root);
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return find(root, query, limit);
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}
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function find(root, query, limit = Infinity) {
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const elems = prepareContext(root, DomUtils, query.shouldTestNextSiblings);
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return DomUtils.find((node) => DomUtils.isTag(node) && query(node), elems, true, limit);
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}
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function filterElements(elements, sel, options) {
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const els = (Array.isArray(elements) ? elements : [elements]).filter(DomUtils.isTag);
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if (els.length === 0)
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return els;
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const query = compileToken(sel, options);
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return query === boolbase.trueFunc ? els : els.filter(query);
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}
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//# sourceMappingURL=index.js.map
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