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94 lines
3.6 KiB
94 lines
3.6 KiB
2 years ago
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import boolbase from "boolbase";
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import { isTraversal } from "../sort.js";
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/** Used as a placeholder for :has. Will be replaced with the actual element. */
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export const PLACEHOLDER_ELEMENT = {};
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export function ensureIsTag(next, adapter) {
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if (next === boolbase.falseFunc)
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return boolbase.falseFunc;
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return (elem) => adapter.isTag(elem) && next(elem);
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}
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export function getNextSiblings(elem, adapter) {
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const siblings = adapter.getSiblings(elem);
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if (siblings.length <= 1)
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return [];
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const elemIndex = siblings.indexOf(elem);
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if (elemIndex < 0 || elemIndex === siblings.length - 1)
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return [];
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return siblings.slice(elemIndex + 1).filter(adapter.isTag);
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}
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function copyOptions(options) {
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// Not copied: context, rootFunc
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return {
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xmlMode: !!options.xmlMode,
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lowerCaseAttributeNames: !!options.lowerCaseAttributeNames,
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lowerCaseTags: !!options.lowerCaseTags,
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quirksMode: !!options.quirksMode,
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cacheResults: !!options.cacheResults,
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pseudos: options.pseudos,
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adapter: options.adapter,
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equals: options.equals,
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};
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}
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const is = (next, token, options, context, compileToken) => {
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const func = compileToken(token, copyOptions(options), context);
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return func === boolbase.trueFunc
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? next
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: func === boolbase.falseFunc
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? boolbase.falseFunc
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: (elem) => func(elem) && next(elem);
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};
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/*
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* :not, :has, :is, :matches and :where have to compile selectors
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* doing this in src/pseudos.ts would lead to circular dependencies,
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* so we add them here
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*/
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export const subselects = {
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is,
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/**
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* `:matches` and `:where` are aliases for `:is`.
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*/
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matches: is,
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where: is,
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not(next, token, options, context, compileToken) {
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const func = compileToken(token, copyOptions(options), context);
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return func === boolbase.falseFunc
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? next
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: func === boolbase.trueFunc
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? boolbase.falseFunc
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: (elem) => !func(elem) && next(elem);
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},
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has(next, subselect, options, _context, compileToken) {
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const { adapter } = options;
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const opts = copyOptions(options);
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opts.relativeSelector = true;
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const context = subselect.some((s) => s.some(isTraversal))
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? // Used as a placeholder. Will be replaced with the actual element.
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[PLACEHOLDER_ELEMENT]
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: undefined;
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const compiled = compileToken(subselect, opts, context);
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if (compiled === boolbase.falseFunc)
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return boolbase.falseFunc;
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const hasElement = ensureIsTag(compiled, adapter);
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// If `compiled` is `trueFunc`, we can skip this.
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if (context && compiled !== boolbase.trueFunc) {
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/*
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* `shouldTestNextSiblings` will only be true if the query starts with
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* a traversal (sibling or adjacent). That means we will always have a context.
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*/
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const { shouldTestNextSiblings = false } = compiled;
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return (elem) => {
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if (!next(elem))
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return false;
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context[0] = elem;
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const childs = adapter.getChildren(elem);
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const nextElements = shouldTestNextSiblings
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? [...childs, ...getNextSiblings(elem, adapter)]
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: childs;
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return adapter.existsOne(hasElement, nextElements);
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};
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}
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return (elem) => next(elem) &&
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adapter.existsOne(hasElement, adapter.getChildren(elem));
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},
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};
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//# sourceMappingURL=subselects.js.map
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