85 lines
2.1 KiB
JavaScript
85 lines
2.1 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 _postcssValueParser = require('postcss-value-parser');
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var _stylehacks = require('stylehacks');
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var _genericMerge = require('../genericMerge');
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var _getValue = require('../getValue');
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var _getValue2 = _interopRequireDefault(_getValue);
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var _insertCloned = require('../insertCloned');
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var _insertCloned2 = _interopRequireDefault(_insertCloned);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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var properties = ['column-width', 'column-count'];
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var auto = 'auto';
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/**
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* Normalize a columns shorthand definition. Both of the longhand
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* properties' initial values are 'auto', and as per the spec,
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* omitted values are set to their initial values. Thus, we can
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* remove any 'auto' definition when there are two values.
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*
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* Specification link: https://www.w3.org/TR/css3-multicol/
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*/
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function normalize(values) {
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if (values[0] === auto) {
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return values[1];
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}
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if (values[1] === auto) {
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return values[0];
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}
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return values.join(' ');
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}
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function explode(rule) {
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if (rule.nodes.some(_stylehacks.detect)) {
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return false;
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}
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rule.walkDecls('columns', function (decl) {
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var values = _postcss.list.space(decl.value);
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if (values.length === 1) {
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values.push(auto);
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}
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values.forEach(function (value, i) {
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var prop = properties[1];
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if (value === auto) {
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prop = properties[i];
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} else if ((0, _postcssValueParser.unit)(value).unit) {
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prop = properties[0];
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}
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(0, _insertCloned2.default)(rule, decl, {
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prop: prop,
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value: value
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});
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});
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decl.remove();
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});
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}
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var merge = (0, _genericMerge.genericMergeFactory)({
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prop: 'columns',
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properties: properties,
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value: function value(rules) {
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return normalize(rules.map(_getValue2.default));
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}
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});
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exports.default = {
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explode: explode,
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merge: merge
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};
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module.exports = exports['default'];
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