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94 lines
3.6 KiB
94 lines
3.6 KiB
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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