93 lines
2.9 KiB
JavaScript
93 lines
2.9 KiB
JavaScript
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'use strict';
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exports.__esModule = true;
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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 _evenValues = require('./evenValues');
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var _evenValues2 = _interopRequireDefault(_evenValues);
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var _getArguments = require('./getArguments');
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var _getArguments2 = _interopRequireDefault(_getArguments);
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var _getMatch = require('./getMatch');
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var _getMatch2 = _interopRequireDefault(_getMatch);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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var mappings = [['repeat-x', ['repeat', 'no-repeat']], ['repeat-y', ['no-repeat', 'repeat']], ['repeat', ['repeat', 'repeat']], ['space', ['space', 'space']], ['round', ['round', 'round']], ['no-repeat', ['no-repeat', 'no-repeat']]];
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var repeat = [mappings[0][0], mappings[1][0], mappings[2][0], mappings[3][0], mappings[4][0], mappings[5][0]];
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var getMatch = (0, _getMatch2.default)(mappings);
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function transform(decl) {
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var values = (0, _postcssValueParser2.default)(decl.value);
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if (values.nodes.length === 1) {
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return;
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}
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var args = (0, _getArguments2.default)(values);
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var relevant = [];
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args.forEach(function (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(function (part, index) {
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var isRepeat = ~repeat.indexOf(part.value);
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var 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(function (range, index) {
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if (range.start === null) {
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return;
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}
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var 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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var match = getMatch(val.filter(_evenValues2.default).map(function (n) {
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return n.value;
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}));
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if (match.length) {
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args[index][range.start].value = match[0][0];
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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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decl.value = values.toString();
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}
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var plugin = _postcss2.default.plugin('cssnano-reduce-background-repeat', function () {
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return function (css) {
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return css.walkDecls(/background(-repeat|$)/, transform);
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};
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});
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plugin.mappings = mappings;
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exports.default = plugin;
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module.exports = exports['default'];
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