67 lines
1.7 KiB
JavaScript
67 lines
1.7 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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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function unicode(range) {
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var values = range.slice(2).split('-');
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if (values.length < 2) {
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return range;
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}
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var left = values[0].split('');
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var right = values[1].split('');
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if (left.length !== right.length) {
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return range;
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}
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var questionCounter = 0;
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var merged = left.reduce(function (group, value, index) {
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if (group === false) {
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return false;
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}
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if (value === right[index] && !questionCounter) {
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return group + value;
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}
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if (value === '0' && right[index] === 'f') {
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questionCounter++;
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return group + '?';
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}
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return false;
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}, 'u+');
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/*
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* The maximum number of wildcard characters (?) for ranges is 5.
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*/
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if (merged && questionCounter < 6) {
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return merged;
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}
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return range;
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}
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exports.default = _postcss2.default.plugin('cssnano-normalize-unicode', function () {
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return function (css) {
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css.walkDecls(/^unicode-range$/i, function (node) {
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node.prop = 'unicode-range';
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node.value = (0, _postcssValueParser2.default)(node.value).walk(function (child) {
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if (child.type === 'word') {
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child.value = unicode(child.value.toLowerCase());
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}
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return false;
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}).toString();
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});
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};
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});
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module.exports = exports['default'];
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