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