'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _postcss = require('postcss');
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var _postcss2 = _interopRequireDefault(_postcss);
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var _postcssValueParser = require('postcss-value-parser');
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var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
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var _cssnanoUtilGetArguments = require('cssnano-util-get-arguments');
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var _cssnanoUtilGetArguments2 = _interopRequireDefault(_cssnanoUtilGetArguments);
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var _cssnanoUtilGetMatch = require('cssnano-util-get-match');
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var _cssnanoUtilGetMatch2 = _interopRequireDefault(_cssnanoUtilGetMatch);
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var _map = require('./lib/map');
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var _map2 = _interopRequireDefault(_map);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function evenValues(list, index) {
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return index % 2 === 0;
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}
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const repeatKeywords = _map2.default.map(mapping => mapping[0]);
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const getMatch = (0, _cssnanoUtilGetMatch2.default)(_map2.default);
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exports.default = _postcss2.default.plugin('postcss-normalize-repeat-style', () => {
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return css => {
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const cache = {};
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css.walkDecls(/background(-repeat)?|(-webkit-)?mask-repeat/i, decl => {
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const value = decl.value;
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if (cache[value]) {
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decl.value = cache[value];
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return;
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}
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const parsed = (0, _postcssValueParser2.default)(value);
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if (parsed.nodes.length === 1) {
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cache[value] = value;
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return;
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}
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const args = (0, _cssnanoUtilGetArguments2.default)(parsed);
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const relevant = [];
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args.forEach(arg => {
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relevant.push({
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start: null,
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end: null
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});
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arg.forEach((part, index) => {
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const isRepeat = ~repeatKeywords.indexOf(part.value.toLowerCase());
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const len = relevant.length - 1;
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if (relevant[len].start === null && isRepeat) {
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relevant[len].start = index;
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relevant[len].end = index;
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return;
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}
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if (relevant[len].start !== null) {
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if (part.type === 'space') {
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return;
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} else if (isRepeat) {
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relevant[len].end = index;
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return;
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}
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return;
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}
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});
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});
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relevant.forEach((range, index) => {
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if (range.start === null) {
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return;
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}
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const val = args[index].slice(range.start, range.end + 1);
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if (val.length !== 3) {
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return;
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}
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const match = getMatch(val.filter(evenValues).map(n => n.value.toLowerCase()));
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if (match) {
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args[index][range.start].value = match;
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args[index][range.start + 1].value = '';
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args[index][range.end].value = '';
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}
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});
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const result = parsed.toString();
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decl.value = result;
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cache[value] = result;
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});
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};
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});
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module.exports = exports['default'];
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