katoikia-app/web-ui/web-react/node_modules/postcss-discard-duplicates/dist/index.js

131 lines
2.9 KiB
JavaScript

'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _postcss = require('postcss');
function noop() {}
function trimValue(value) {
return value ? value.trim() : value;
}
function empty(node) {
return !node.nodes.filter(child => child.type !== 'comment').length;
}
function equals(a, b) {
if (a.type !== b.type) {
return false;
}
if (a.important !== b.important) {
return false;
}
if (a.raws && !b.raws || !a.raws && b.raws) {
return false;
}
switch (a.type) {
case 'rule':
if (a.selector !== b.selector) {
return false;
}
break;
case 'atrule':
if (a.name !== b.name || a.params !== b.params) {
return false;
}
if (a.raws && trimValue(a.raws.before) !== trimValue(b.raws.before)) {
return false;
}
if (a.raws && trimValue(a.raws.afterName) !== trimValue(b.raws.afterName)) {
return false;
}
break;
case 'decl':
if (a.prop !== b.prop || a.value !== b.value) {
return false;
}
if (a.raws && trimValue(a.raws.before) !== trimValue(b.raws.before)) {
return false;
}
break;
}
if (a.nodes) {
if (a.nodes.length !== b.nodes.length) {
return false;
}
for (let i = 0; i < a.nodes.length; i++) {
if (!equals(a.nodes[i], b.nodes[i])) {
return false;
}
}
}
return true;
}
function dedupeRule(last, nodes) {
let index = nodes.indexOf(last) - 1;
while (index >= 0) {
const node = nodes[index--];
if (node && node.type === 'rule' && node.selector === last.selector) {
last.each(child => {
if (child.type === 'decl') {
dedupeNode(child, node.nodes);
}
});
if (empty(node)) {
node.remove();
}
}
}
}
function dedupeNode(last, nodes) {
let index = !!~nodes.indexOf(last) ? nodes.indexOf(last) - 1 : nodes.length - 1;
while (index >= 0) {
const node = nodes[index--];
if (node && equals(node, last)) {
node.remove();
}
}
}
const handlers = {
rule: dedupeRule,
atrule: dedupeNode,
decl: dedupeNode,
comment: noop
};
function dedupe(root) {
const { nodes } = root;
if (!nodes) {
return;
}
let index = nodes.length - 1;
while (index >= 0) {
let last = nodes[index--];
if (!last || !last.parent) {
continue;
}
dedupe(last);
handlers[last.type](last, nodes);
}
}
exports.default = (0, _postcss.plugin)('postcss-discard-duplicates', () => dedupe);
module.exports = exports['default'];