index.js
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'use strict';
var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
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 }; }
var multiline = /\\[\r\n]/;
var escapeChars = /([\s\(\)"'])/g;
function convert(url, options) {
if ((0, _isAbsoluteUrl2.default)(url) || !url.indexOf('//')) {
return (0, _normalizeUrl2.default)(url, options);
}
return _path2.default.normalize(url).replace(new RegExp('\\' + _path2.default.sep, 'g'), '/');
}
function transformNamespace(rule) {
rule.params = (0, _postcssValueParser2.default)(rule.params).walk(function (node) {
if (node.type === 'function' && node.value === '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(function (node) {
if (node.type !== 'function' || node.value !== 'url' || !node.nodes.length) {
return false;
}
var url = node.nodes[0];
var escaped = void 0;
node.before = node.after = '';
url.value = url.value.trim().replace(multiline, '');
if (~url.value.indexOf('data:image/') || ~url.value.indexOf('data:application/') || ~url.value.indexOf('data:font/')) {
return false;
}
if (!~url.value.indexOf('chrome-extension')) {
url.value = convert(url.value, opts);
}
if (escapeChars.test(url.value)) {
escaped = url.value.replace(escapeChars, '\\$1');
if (escaped.length < url.value.length + (url.type === 'string' ? 2 : 0)) {
url.value = escaped;
url.type = 'word';
}
} else {
url.type = 'word';
}
return false;
}).toString();
}
module.exports = _postcss2.default.plugin('postcss-normalize-url', function (opts) {
opts = _extends({
normalizeProtocol: false,
stripFragment: false,
stripWWW: true
}, opts);
return function (css) {
css.walk(function (node) {
if (node.type === 'decl') {
return transformDecl(node, opts);
} else if (node.type === 'atrule' && node.name === 'namespace') {
return transformNamespace(node);
}
});
};
});