213 lines
6.8 KiB
JavaScript
213 lines
6.8 KiB
JavaScript
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/** @typedef {import('postcss-selector-parser').Root} Root */ /** @typedef {import('postcss-selector-parser').Selector} Selector */ /** @typedef {import('postcss-selector-parser').Pseudo} Pseudo */ /** @typedef {import('postcss-selector-parser').Node} Node */ // There are some pseudo-elements that may or may not be:
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// **Actionable**
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// Zero or more user-action pseudo-classes may be attached to the pseudo-element itself
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// structural-pseudo-classes are NOT allowed but we don't make
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// The spec is not clear on whether this is allowed or not — but in practice it is.
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// **Terminal**
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// It MUST be placed at the end of a selector
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//
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// This is the required in the spec. However, some pseudo elements are not "terminal" because
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// they represent a "boundary piercing" that is compiled out by a build step.
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// **Jumpable**
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// Any terminal element may "jump" over combinators when moving to the end of the selector
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//
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// This is a backwards-compat quirk of pseudo element variants from earlier versions of Tailwind CSS.
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/** @typedef {'terminal' | 'actionable' | 'jumpable'} PseudoProperty */ /** @type {Record<string, PseudoProperty[]>} */ "use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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Object.defineProperty(exports, "movePseudos", {
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enumerable: true,
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get: function() {
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return movePseudos;
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}
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});
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let elementProperties = {
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// Pseudo elements from the spec
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"::after": [
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"terminal",
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"jumpable"
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],
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"::backdrop": [
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"terminal",
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"jumpable"
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],
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"::before": [
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"terminal",
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"jumpable"
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],
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"::cue": [
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"terminal"
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],
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"::cue-region": [
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"terminal"
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],
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"::first-letter": [
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"terminal",
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"jumpable"
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],
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"::first-line": [
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"terminal",
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"jumpable"
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],
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"::grammar-error": [
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"terminal"
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],
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"::marker": [
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"terminal",
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"jumpable"
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],
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"::part": [
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"terminal",
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"actionable"
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],
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"::placeholder": [
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"terminal",
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"jumpable"
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],
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"::selection": [
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"terminal",
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"jumpable"
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],
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"::slotted": [
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"terminal"
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],
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"::spelling-error": [
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"terminal"
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],
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"::target-text": [
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"terminal"
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],
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// Pseudo elements from the spec with special rules
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"::file-selector-button": [
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"terminal",
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"actionable"
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],
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// Library-specific pseudo elements used by component libraries
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// These are Shadow DOM-like
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"::deep": [
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"actionable"
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],
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"::v-deep": [
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"actionable"
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],
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"::ng-deep": [
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"actionable"
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],
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// Note: As a rule, double colons (::) should be used instead of a single colon
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// (:). This distinguishes pseudo-classes from pseudo-elements. However, since
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// this distinction was not present in older versions of the W3C spec, most
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// browsers support both syntaxes for the original pseudo-elements.
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":after": [
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"terminal",
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"jumpable"
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],
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":before": [
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"terminal",
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"jumpable"
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],
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":first-letter": [
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"terminal",
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"jumpable"
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],
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":first-line": [
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"terminal",
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"jumpable"
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],
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":where": [],
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":is": [],
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":has": [],
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// The default value is used when the pseudo-element is not recognized
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// Because it's not recognized, we don't know if it's terminal or not
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// So we assume it can be moved AND can have user-action pseudo classes attached to it
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__default__: [
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"terminal",
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"actionable"
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]
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};
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function movePseudos(sel) {
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let [pseudos] = movablePseudos(sel);
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// Remove all pseudo elements from their respective selectors
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pseudos.forEach(([sel, pseudo])=>sel.removeChild(pseudo));
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// Re-add them to the end of the selector in the correct order.
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// This moves terminal pseudo elements to the end of the
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// selector otherwise the selector will not be valid.
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//
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// Examples:
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// - `before:hover:text-center` would result in `.before\:hover\:text-center:hover::before`
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// - `hover:before:text-center` would result in `.hover\:before\:text-center:hover::before`
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//
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// The selector `::before:hover` does not work but we
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// can make it work for you by flipping the order.
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sel.nodes.push(...pseudos.map(([, pseudo])=>pseudo));
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return sel;
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}
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/** @typedef {[sel: Selector, pseudo: Pseudo, attachedTo: Pseudo | null]} MovablePseudo */ /** @typedef {[pseudos: MovablePseudo[], lastSeenElement: Pseudo | null]} MovablePseudosResult */ /**
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* @param {Selector} sel
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* @returns {MovablePseudosResult}
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*/ function movablePseudos(sel) {
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/** @type {MovablePseudo[]} */ let buffer = [];
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/** @type {Pseudo | null} */ let lastSeenElement = null;
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for (let node of sel.nodes){
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if (node.type === "combinator") {
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buffer = buffer.filter(([, node])=>propertiesForPseudo(node).includes("jumpable"));
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lastSeenElement = null;
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} else if (node.type === "pseudo") {
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if (isMovablePseudoElement(node)) {
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lastSeenElement = node;
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buffer.push([
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sel,
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node,
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null
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]);
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} else if (lastSeenElement && isAttachablePseudoClass(node, lastSeenElement)) {
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buffer.push([
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sel,
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node,
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lastSeenElement
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]);
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} else {
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lastSeenElement = null;
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}
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var _node_nodes;
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for (let sub of (_node_nodes = node.nodes) !== null && _node_nodes !== void 0 ? _node_nodes : []){
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let [movable, lastSeenElementInSub] = movablePseudos(sub);
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lastSeenElement = lastSeenElementInSub || lastSeenElement;
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buffer.push(...movable);
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}
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}
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}
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return [
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buffer,
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lastSeenElement
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];
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}
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/**
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* @param {Node} node
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* @returns {boolean}
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*/ function isPseudoElement(node) {
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return node.value.startsWith("::") || elementProperties[node.value] !== undefined;
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}
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/**
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* @param {Node} node
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* @returns {boolean}
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*/ function isMovablePseudoElement(node) {
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return isPseudoElement(node) && propertiesForPseudo(node).includes("terminal");
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}
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/**
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* @param {Node} node
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* @param {Pseudo} pseudo
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* @returns {boolean}
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*/ function isAttachablePseudoClass(node, pseudo) {
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if (node.type !== "pseudo") return false;
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if (isPseudoElement(node)) return false;
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return propertiesForPseudo(pseudo).includes("actionable");
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}
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/**
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* @param {Pseudo} pseudo
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* @returns {PseudoProperty[]}
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*/ function propertiesForPseudo(pseudo) {
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var _elementProperties_pseudo_value;
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return (_elementProperties_pseudo_value = elementProperties[pseudo.value]) !== null && _elementProperties_pseudo_value !== void 0 ? _elementProperties_pseudo_value : elementProperties.__default__;
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}
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