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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _alphanumSort = _interopRequireDefault(require("alphanum-sort"));
var _postcssSelectorParser = _interopRequireDefault(require("postcss-selector-parser"));
var _canUnquote = _interopRequireDefault(require("./lib/canUnquote.js"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const pseudoElements = ['::before', '::after', '::first-letter', '::first-line'];
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 ((0, _canUnquote.default)(selector.value)) {
selector.quoteMark = null;
}
if (selector.operator) {
selector.operator = selector.operator.trim();
}
}
selector.rawSpaceBefore = '';
selector.rawSpaceAfter = '';
selector.spaces.attribute = {
before: '',
after: ''
};
selector.spaces.operator = {
before: '',
after: ''
};
selector.spaces.value = {
before: '',
after: selector.insensitive ? ' ' : ''
};
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();
}
function combinator(selector) {
const value = selector.value.trim();
selector.spaces.before = '';
selector.spaces.after = '';
selector.rawSpaceBefore = '';
selector.rawsSpaceAfter = '';
selector.value = value.length ? value : ' ';
}
const pseudoReplacements = {
':nth-child': ':first-child',
':nth-of-type': ':first-of-type',
':nth-last-child': ':last-child',
':nth-last-of-type': ':last-of-type'
};
function pseudo(selector) {
const value = selector.value.toLowerCase();
if (selector.nodes.length === 1 && pseudoReplacements[value]) {
const first = selector.at(0);
const one = first.at(0);
if (first.length === 1) {
if (one.value === '1') {
selector.replaceWith(_postcssSelectorParser.default.pseudo({
value: pseudoReplacements[value]
}));
}
if (one.value.toLowerCase() === 'even') {
one.value = '2n';
}
}
if (first.length === 3) {
const two = first.at(1);
const three = first.at(2);
if (one.value.toLowerCase() === '2n' && two.value === '+' && three.value === '1') {
one.value = 'odd';
two.remove();
three.remove();
}
}
return;
}
const uniques = [];
selector.walk(child => {
if (child.type === 'selector') {
const childStr = String(child);
if (!~uniques.indexOf(childStr)) {
uniques.push(childStr);
} else {
child.remove();
}
}
});
if (~pseudoElements.indexOf(value)) {
selector.value = selector.value.slice(1);
}
}
const tagReplacements = {
from: '0%',
'100%': 'to'
};
function tag(selector) {
const value = selector.value.toLowerCase();
if (Object.prototype.hasOwnProperty.call(tagReplacements, value)) {
selector.value = tagReplacements[value];
}
}
function universal(selector) {
const next = selector.next();
if (next && next.type !== 'combinator') {
selector.remove();
}
}
const reducers = {
attribute,
combinator,
pseudo,
tag,
universal
};
function pluginCreator() {
return {
postcssPlugin: 'postcss-minify-selectors',
OnceExit(css) {
const cache = {};
const processor = (0, _postcssSelectorParser.default)(selectors => {
selectors.nodes = (0, _alphanumSort.default)(selectors.nodes, {
insensitive: true
});
const uniqueSelectors = [];
selectors.walk(sel => {
const {
type
} = sel; // Trim whitespace around the value
sel.spaces.before = sel.spaces.after = '';
if (Object.prototype.hasOwnProperty.call(reducers, type)) {
reducers[type](sel);
return;
}
const toString = String(sel);
if (type === 'selector' && sel.parent.type !== 'pseudo') {
if (!~uniqueSelectors.indexOf(toString)) {
uniqueSelectors.push(toString);
} else {
sel.remove();
}
}
});
});
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[selector]) {
rule.selector = cache[selector];
return;
}
const optimizedSelector = processor.processSync(selector);
rule.selector = optimizedSelector;
cache[selector] = optimizedSelector;
});
}
};
}
pluginCreator.postcss = true;
var _default = pluginCreator;
exports.default = _default;
module.exports = exports.default;