59 lines
2.8 KiB
JavaScript
59 lines
2.8 KiB
JavaScript
"use strict";
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/*
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* Pseudo selectors
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*
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* Pseudo selectors are available in three forms:
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*
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* 1. Filters are called when the selector is compiled and return a function
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* that has to return either false, or the results of `next()`.
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* 2. Pseudos are called on execution. They have to return a boolean.
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* 3. Subselects work like filters, but have an embedded selector that will be run separately.
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*
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* Filters are great if you want to do some pre-processing, or change the call order
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* of `next()` and your code.
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* Pseudos should be used to implement simple checks.
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*/
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.aliases = exports.pseudos = exports.filters = void 0;
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exports.compilePseudoSelector = compilePseudoSelector;
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const css_what_1 = require("css-what");
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const aliases_js_1 = require("./aliases.js");
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Object.defineProperty(exports, "aliases", { enumerable: true, get: function () { return aliases_js_1.aliases; } });
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const filters_js_1 = require("./filters.js");
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Object.defineProperty(exports, "filters", { enumerable: true, get: function () { return filters_js_1.filters; } });
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const pseudos_js_1 = require("./pseudos.js");
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Object.defineProperty(exports, "pseudos", { enumerable: true, get: function () { return pseudos_js_1.pseudos; } });
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const subselects_js_1 = require("./subselects.js");
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function compilePseudoSelector(next, selector, options, context, compileToken) {
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const { name, data } = selector;
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if (Array.isArray(data)) {
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if (!(name in subselects_js_1.subselects)) {
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throw new Error(`Unknown pseudo-class :${name}(${data})`);
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}
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return subselects_js_1.subselects[name](next, data, options, context, compileToken);
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}
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const userPseudo = options.pseudos?.[name];
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const stringPseudo = typeof userPseudo === "string" ? userPseudo : aliases_js_1.aliases[name];
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if (typeof stringPseudo === "string") {
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if (data != null) {
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throw new Error(`Pseudo ${name} doesn't have any arguments`);
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}
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// The alias has to be parsed here, to make sure options are respected.
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const alias = (0, css_what_1.parse)(stringPseudo);
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return subselects_js_1.subselects["is"](next, alias, options, context, compileToken);
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}
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if (typeof userPseudo === "function") {
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(0, pseudos_js_1.verifyPseudoArgs)(userPseudo, name, data, 1);
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return (elem) => userPseudo(elem, data) && next(elem);
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}
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if (name in filters_js_1.filters) {
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return filters_js_1.filters[name](next, data, options, context);
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}
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if (name in pseudos_js_1.pseudos) {
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const pseudo = pseudos_js_1.pseudos[name];
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(0, pseudos_js_1.verifyPseudoArgs)(pseudo, name, data, 2);
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return (elem) => pseudo(elem, options, data) && next(elem);
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}
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throw new Error(`Unknown pseudo-class :${name}`);
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}
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//# sourceMappingURL=index.js.map
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