aaac7fed
 liuqimichale
add
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'use strict';
exports.__esModule = true;
var _postcss = require('postcss');
var _postcss2 = _interopRequireDefault(_postcss);
var _postcssValueParser = require('postcss-value-parser');
var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function unicode(range) {
var values = range.slice(2).split('-');
if (values.length < 2) {
return range;
}
var left = values[0].split('');
var right = values[1].split('');
if (left.length !== right.length) {
return range;
}
var questionCounter = 0;
var merged = left.reduce(function (group, value, index) {
if (group === false) {
return false;
}
if (value === right[index] && !questionCounter) {
return group + value;
}
if (value === '0' && right[index] === 'f') {
questionCounter++;
return group + '?';
}
return false;
}, 'u+');
/*
* The maximum number of wildcard characters (?) for ranges is 5.
*/
if (merged && questionCounter < 6) {
return merged;
}
return range;
}
exports.default = _postcss2.default.plugin('cssnano-normalize-unicode', function () {
return function (css) {
css.walkDecls(/^unicode-range$/i, function (node) {
node.prop = 'unicode-range';
node.value = (0, _postcssValueParser2.default)(node.value).walk(function (child) {
if (child.type === 'word') {
child.value = unicode(child.value.toLowerCase());
}
return false;
}).toString();
});
};
});
module.exports = exports['default'];
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