diff options
Diffstat (limited to 'node_modules/postcss-minify-selectors/src/index.js')
| -rw-r--r-- | node_modules/postcss-minify-selectors/src/index.js | 267 |
1 files changed, 0 insertions, 267 deletions
diff --git a/node_modules/postcss-minify-selectors/src/index.js b/node_modules/postcss-minify-selectors/src/index.js deleted file mode 100644 index 68950172..00000000 --- a/node_modules/postcss-minify-selectors/src/index.js +++ /dev/null @@ -1,267 +0,0 @@ -'use strict'; -const parser = require('postcss-selector-parser'); -const canUnquote = require('./lib/canUnquote.js'); - -const pseudoElements = new Set([ - '::before', - '::after', - '::first-letter', - '::first-line', -]); - -/** - * @param {parser.Attribute} selector - * @return {void} - */ -function attribute(selector) { - if (selector.value) { - if (selector.raws.value) { - // Join selectors that are split over new lines - selector.raws.value = selector.raws.value.replace(/\\\n/g, '').trim(); - } - if (canUnquote(selector.value)) { - selector.quoteMark = null; - } - - if (selector.operator) { - selector.operator = /** @type {parser.AttributeOperator} */ ( - selector.operator.trim() - ); - } - } - - selector.rawSpaceBefore = ''; - selector.rawSpaceAfter = ''; - selector.spaces.attribute = { before: '', after: '' }; - selector.spaces.operator = { before: '', after: '' }; - selector.spaces.value = { - before: '', - after: selector.insensitive ? ' ' : '', - }; - - if (selector.raws.spaces) { - selector.raws.spaces.attribute = { - before: '', - after: '', - }; - - selector.raws.spaces.operator = { - before: '', - after: '', - }; - - selector.raws.spaces.value = { - before: '', - after: selector.insensitive ? ' ' : '', - }; - - if (selector.insensitive) { - selector.raws.spaces.insensitive = { - before: '', - after: '', - }; - } - } - - selector.attribute = selector.attribute.trim(); -} - -/** - * @param {parser.Combinator} selector - * @return {void} - */ -function combinator(selector) { - const value = selector.value.trim(); - selector.spaces.before = ''; - selector.spaces.after = ''; - selector.rawSpaceBefore = ''; - selector.rawSpaceAfter = ''; - selector.value = value.length ? value : ' '; -} - -const pseudoReplacements = new Map([ - [':nth-child', ':first-child'], - [':nth-of-type', ':first-of-type'], - [':nth-last-child', ':last-child'], - [':nth-last-of-type', ':last-of-type'], -]); - -/** - * @param {parser.Pseudo} selector - * @return {void} - */ -function pseudo(selector) { - const value = selector.value.toLowerCase(); - - if (selector.nodes.length === 1 && pseudoReplacements.has(value)) { - const first = selector.at(0); - const one = first.at(0); - - if (first.length === 1) { - if (one.value === '1') { - selector.replaceWith( - parser.pseudo({ - value: /** @type {string} */ (pseudoReplacements.get(value)), - }) - ); - } - - if (one.value && one.value.toLowerCase() === 'even') { - one.value = '2n'; - } - } - - if (first.length === 3) { - const two = first.at(1); - const three = first.at(2); - - if ( - one.value && - one.value.toLowerCase() === '2n' && - two.value === '+' && - three.value === '1' - ) { - one.value = 'odd'; - - two.remove(); - three.remove(); - } - } - - return; - } - - selector.walk((child) => { - if (child.type === 'selector' && child.parent) { - const uniques = new Set(); - child.parent.each((sibling) => { - const siblingStr = String(sibling); - - if (!uniques.has(siblingStr)) { - uniques.add(siblingStr); - } else { - sibling.remove(); - } - }); - } - }); - - if (pseudoElements.has(value)) { - selector.value = selector.value.slice(1); - } -} - -const tagReplacements = new Map([ - ['from', '0%'], - ['100%', 'to'], -]); - -/** - * @param {parser.Tag} selector - * @return {void} - */ -function tag(selector) { - const value = selector.value.toLowerCase(); - - const isSimple = selector.parent && selector.parent.nodes.length === 1; - // Avoid simplifying complex selectors (`entry 100% {...}`) - if (!isSimple) { - return; - } - - // Simplify simple selectors that have replacements (`100% {...}`) - if (tagReplacements.has(value)) { - selector.value = /** @type {string} */ (tagReplacements.get(value)); - } -} - -/** - * @param {parser.Universal} selector - * @return {void} - */ -function universal(selector) { - const next = selector.next(); - - if (next && next.type !== 'combinator') { - selector.remove(); - } -} - -const reducers = new Map( - /** @type {[string, ((selector: parser.Node) => void)][]}*/ ([ - ['attribute', attribute], - ['combinator', combinator], - ['pseudo', pseudo], - ['tag', tag], - ['universal', universal], - ]) -); - -/** - * @type {import('postcss').PluginCreator<void>} - * @return {import('postcss').Plugin} - */ -function pluginCreator() { - return { - postcssPlugin: 'postcss-minify-selectors', - - OnceExit(css) { - const cache = new Map(); - const processor = parser((selectors) => { - const uniqueSelectors = new Set(); - - selectors.walk((sel) => { - // Trim whitespace around the value - sel.spaces.before = sel.spaces.after = ''; - const reducer = reducers.get(sel.type); - if (reducer !== undefined) { - reducer(sel); - return; - } - - const toString = String(sel); - - if ( - sel.type === 'selector' && - sel.parent && - sel.parent.type !== 'pseudo' - ) { - if (!uniqueSelectors.has(toString)) { - uniqueSelectors.add(toString); - } else { - sel.remove(); - } - } - }); - selectors.nodes.sort(); - }); - - css.walkRules((rule) => { - const selector = - rule.raws.selector && rule.raws.selector.value === rule.selector - ? rule.raws.selector.raw - : rule.selector; - - // If the selector ends with a ':' it is likely a part of a custom mixin, - // so just pass through. - if (selector[selector.length - 1] === ':') { - return; - } - - if (cache.has(selector)) { - rule.selector = cache.get(selector); - - return; - } - - const optimizedSelector = processor.processSync(selector); - - rule.selector = optimizedSelector; - cache.set(selector, optimizedSelector); - }); - }, - }; -} - -pluginCreator.postcss = true; -module.exports = pluginCreator; |