| 'use strict'; |
| |
| Object.defineProperty(exports, "__esModule", { |
| value: true |
| }); |
| |
| var _path = require('path'); |
| |
| var _path2 = _interopRequireDefault(_path); |
| |
| var _postcss = require('postcss'); |
| |
| var _postcss2 = _interopRequireDefault(_postcss); |
| |
| var _postcssValueParser = require('postcss-value-parser'); |
| |
| var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser); |
| |
| var _normalizeUrl = require('normalize-url'); |
| |
| var _normalizeUrl2 = _interopRequireDefault(_normalizeUrl); |
| |
| var _isAbsoluteUrl = require('is-absolute-url'); |
| |
| var _isAbsoluteUrl2 = _interopRequireDefault(_isAbsoluteUrl); |
| |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
| |
| const multiline = /\\[\r\n]/; |
| const escapeChars = /([\s\(\)"'])/g; |
| |
| function convert(url, options) { |
| if ((0, _isAbsoluteUrl2.default)(url) || url.startsWith('//')) { |
| let normalizedURL = null; |
| |
| try { |
| normalizedURL = (0, _normalizeUrl2.default)(url, options); |
| } catch (e) { |
| normalizedURL = url; |
| } |
| |
| return normalizedURL; |
| } |
| |
| // `path.normalize` always returns backslashes on Windows, need replace in `/` |
| return _path2.default.normalize(url).replace(new RegExp('\\' + _path2.default.sep, 'g'), '/'); |
| } |
| |
| function transformNamespace(rule) { |
| rule.params = (0, _postcssValueParser2.default)(rule.params).walk(node => { |
| if (node.type === 'function' && node.value.toLowerCase() === 'url' && node.nodes.length) { |
| node.type = 'string'; |
| node.quote = node.nodes[0].quote || '"'; |
| node.value = node.nodes[0].value; |
| } |
| if (node.type === 'string') { |
| node.value = node.value.trim(); |
| } |
| return false; |
| }).toString(); |
| } |
| |
| function transformDecl(decl, opts) { |
| decl.value = (0, _postcssValueParser2.default)(decl.value).walk(node => { |
| if (node.type !== 'function' || node.value.toLowerCase() !== 'url' || !node.nodes.length) { |
| return false; |
| } |
| |
| let url = node.nodes[0]; |
| let escaped; |
| |
| node.before = node.after = ''; |
| url.value = url.value.trim().replace(multiline, ''); |
| |
| // Skip empty URLs |
| // Empty URL function equals request to current stylesheet where it is declared |
| if (url.value.length === 0) { |
| url.quote = ''; |
| |
| return false; |
| } |
| |
| if (/^data:(.*)?,/i.test(url.value)) { |
| return false; |
| } |
| |
| if (!/^.+-extension:\//i.test(url.value)) { |
| url.value = convert(url.value, opts); |
| } |
| |
| if (escapeChars.test(url.value) && url.type === 'string') { |
| escaped = url.value.replace(escapeChars, '\\$1'); |
| if (escaped.length < url.value.length + 2) { |
| url.value = escaped; |
| url.type = 'word'; |
| } |
| } else { |
| url.type = 'word'; |
| } |
| |
| return false; |
| }).toString(); |
| } |
| |
| exports.default = _postcss2.default.plugin('postcss-normalize-url', opts => { |
| opts = Object.assign({}, { |
| normalizeProtocol: false, |
| stripFragment: false, |
| stripWWW: false |
| }, opts); |
| |
| return css => { |
| css.walk(node => { |
| if (node.type === 'decl') { |
| return transformDecl(node, opts); |
| } else if (node.type === 'atrule' && node.name.toLowerCase() === 'namespace') { |
| return transformNamespace(node); |
| } |
| }); |
| }; |
| }); |
| module.exports = exports['default']; |