| "use strict"; |
| |
| Object.defineProperty(exports, "__esModule", { |
| value: true |
| }); |
| exports.default = void 0; |
| |
| var _browserslist = _interopRequireDefault(require("browserslist")); |
| |
| var _postcssValueParser = _interopRequireDefault(require("postcss-value-parser")); |
| |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
| |
| const regexLowerCaseUPrefix = /^u(?=\+)/; |
| |
| function unicode(range) { |
| const values = range.slice(2).split('-'); |
| |
| if (values.length < 2) { |
| return range; |
| } |
| |
| const left = values[0].split(''); |
| const right = values[1].split(''); |
| |
| if (left.length !== right.length) { |
| return range; |
| } |
| |
| let questionCounter = 0; |
| const merged = left.reduce((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; |
| } |
| /* |
| * IE and Edge before 16 version ignore the unicode-range if the 'U' is lowercase |
| * |
| * https://caniuse.com/#search=unicode-range |
| */ |
| |
| |
| function hasLowerCaseUPrefixBug(browser) { |
| return ~(0, _browserslist.default)('ie <=11, edge <= 15').indexOf(browser); |
| } |
| |
| function transform(value, isLegacy = false) { |
| return (0, _postcssValueParser.default)(value).walk(child => { |
| if (child.type === 'unicode-range') { |
| const transformed = unicode(child.value.toLowerCase()); |
| child.value = isLegacy ? transformed.replace(regexLowerCaseUPrefix, 'U') : transformed; |
| } |
| |
| return false; |
| }).toString(); |
| } |
| |
| function pluginCreator() { |
| return { |
| postcssPlugin: 'postcss-normalize-unicode', |
| |
| prepare(result) { |
| const cache = new Map(); |
| const resultOpts = result.opts || {}; |
| const browsers = (0, _browserslist.default)(null, { |
| stats: resultOpts.stats, |
| path: __dirname, |
| env: resultOpts.env |
| }); |
| const isLegacy = browsers.some(hasLowerCaseUPrefixBug); |
| return { |
| OnceExit(css) { |
| css.walkDecls(/^unicode-range$/i, decl => { |
| const value = decl.value; |
| |
| if (cache.has(value)) { |
| decl.value = cache.get(value); |
| return; |
| } |
| |
| const newValue = transform(value, isLegacy); |
| decl.value = newValue; |
| cache.set(value, newValue); |
| }); |
| } |
| |
| }; |
| } |
| |
| }; |
| } |
| |
| pluginCreator.postcss = true; |
| var _default = pluginCreator; |
| exports.default = _default; |
| module.exports = exports.default; |