549 lines
18 KiB
JavaScript
549 lines
18 KiB
JavaScript
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import postcss from 'postcss';
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import valueParser from 'postcss-values-parser';
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import fs from 'fs';
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import path from 'path';
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function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
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try {
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var info = gen[key](arg);
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var value = info.value;
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} catch (error) {
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reject(error);
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return;
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}
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if (info.done) {
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resolve(value);
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} else {
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Promise.resolve(value).then(_next, _throw);
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}
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}
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function _asyncToGenerator(fn) {
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return function () {
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var self = this,
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args = arguments;
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return new Promise(function (resolve, reject) {
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var gen = fn.apply(self, args);
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function _next(value) {
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asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
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}
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function _throw(err) {
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asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
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}
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_next(undefined);
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});
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};
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}
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function parse(string) {
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return valueParser(string).parse();
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}
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function isBlockIgnored(ruleOrDeclaration) {
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var rule = ruleOrDeclaration.selector ? ruleOrDeclaration : ruleOrDeclaration.parent;
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return /(!\s*)?postcss-custom-properties:\s*off\b/i.test(rule.toString());
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}
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function isRuleIgnored(rule) {
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var previous = rule.prev();
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return Boolean(isBlockIgnored(rule) || previous && previous.type === 'comment' && /(!\s*)?postcss-custom-properties:\s*ignore\s+next\b/i.test(previous.text));
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}
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function getCustomPropertiesFromRoot(root, opts) {
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// initialize custom selectors
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const customPropertiesFromHtmlElement = {};
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const customPropertiesFromRootPseudo = {}; // for each html or :root rule
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root.nodes.slice().forEach(rule => {
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const customPropertiesObject = isHtmlRule(rule) ? customPropertiesFromHtmlElement : isRootRule(rule) ? customPropertiesFromRootPseudo : null; // for each custom property
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if (customPropertiesObject) {
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rule.nodes.slice().forEach(decl => {
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if (isCustomDecl(decl) && !isBlockIgnored(decl)) {
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const prop = decl.prop; // write the parsed value to the custom property
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customPropertiesObject[prop] = parse(decl.value).nodes; // conditionally remove the custom property declaration
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if (!opts.preserve) {
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decl.remove();
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}
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}
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}); // conditionally remove the empty html or :root rule
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if (!opts.preserve && isEmptyParent(rule) && !isBlockIgnored(rule)) {
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rule.remove();
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}
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}
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}); // return all custom properties, preferring :root properties over html properties
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return Object.assign({}, customPropertiesFromHtmlElement, customPropertiesFromRootPseudo);
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} // match html and :root rules
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const htmlSelectorRegExp = /^html$/i;
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const rootSelectorRegExp = /^:root$/i;
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const customPropertyRegExp = /^--[A-z][\w-]*$/; // whether the node is an html or :root rule
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const isHtmlRule = node => node.type === 'rule' && htmlSelectorRegExp.test(node.selector) && Object(node.nodes).length;
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const isRootRule = node => node.type === 'rule' && rootSelectorRegExp.test(node.selector) && Object(node.nodes).length; // whether the node is an custom property
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const isCustomDecl = node => node.type === 'decl' && customPropertyRegExp.test(node.prop); // whether the node is a parent without children
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const isEmptyParent = node => Object(node.nodes).length === 0;
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/* Get Custom Properties from CSS File
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/* ========================================================================== */
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function getCustomPropertiesFromCSSFile(_x) {
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return _getCustomPropertiesFromCSSFile.apply(this, arguments);
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}
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/* Get Custom Properties from Object
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/* ========================================================================== */
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function _getCustomPropertiesFromCSSFile() {
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_getCustomPropertiesFromCSSFile = _asyncToGenerator(function* (from) {
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const css = yield readFile(from);
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const root = postcss.parse(css, {
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from
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});
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return getCustomPropertiesFromRoot(root, {
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preserve: true
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});
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});
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return _getCustomPropertiesFromCSSFile.apply(this, arguments);
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}
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function getCustomPropertiesFromObject(object) {
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const customProperties = Object.assign({}, Object(object).customProperties, Object(object)['custom-properties']);
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for (const key in customProperties) {
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customProperties[key] = parse(String(customProperties[key])).nodes;
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}
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return customProperties;
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}
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/* Get Custom Properties from JSON file
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/* ========================================================================== */
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function getCustomPropertiesFromJSONFile(_x2) {
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return _getCustomPropertiesFromJSONFile.apply(this, arguments);
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}
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/* Get Custom Properties from JS file
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/* ========================================================================== */
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function _getCustomPropertiesFromJSONFile() {
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_getCustomPropertiesFromJSONFile = _asyncToGenerator(function* (from) {
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const object = yield readJSON(from);
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return getCustomPropertiesFromObject(object);
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});
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return _getCustomPropertiesFromJSONFile.apply(this, arguments);
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}
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function getCustomPropertiesFromJSFile(_x3) {
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return _getCustomPropertiesFromJSFile.apply(this, arguments);
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}
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/* Get Custom Properties from Imports
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/* ========================================================================== */
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function _getCustomPropertiesFromJSFile() {
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_getCustomPropertiesFromJSFile = _asyncToGenerator(function* (from) {
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const object = yield import(from);
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return getCustomPropertiesFromObject(object);
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});
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return _getCustomPropertiesFromJSFile.apply(this, arguments);
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}
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function getCustomPropertiesFromImports(sources) {
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return sources.map(source => {
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if (source instanceof Promise) {
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return source;
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} else if (source instanceof Function) {
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return source();
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} // read the source as an object
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const opts = source === Object(source) ? source : {
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from: String(source)
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}; // skip objects with Custom Properties
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if (opts.customProperties || opts['custom-properties']) {
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return opts;
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} // source pathname
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const from = path.resolve(String(opts.from || '')); // type of file being read from
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const type = (opts.type || path.extname(from).slice(1)).toLowerCase();
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return {
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type,
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from
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};
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}).reduce(
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/*#__PURE__*/
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function () {
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var _ref = _asyncToGenerator(function* (customProperties, source) {
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const _ref2 = yield source,
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type = _ref2.type,
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from = _ref2.from;
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if (type === 'css') {
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return Object.assign((yield customProperties), (yield getCustomPropertiesFromCSSFile(from)));
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}
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if (type === 'js') {
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return Object.assign((yield customProperties), (yield getCustomPropertiesFromJSFile(from)));
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}
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if (type === 'json') {
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return Object.assign((yield customProperties), (yield getCustomPropertiesFromJSONFile(from)));
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}
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return Object.assign((yield customProperties), (yield getCustomPropertiesFromObject((yield source))));
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});
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return function (_x4, _x5) {
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return _ref.apply(this, arguments);
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};
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}(), {});
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}
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/* Helper utilities
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/* ========================================================================== */
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const readFile = from => new Promise((resolve, reject) => {
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fs.readFile(from, 'utf8', (error, result) => {
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if (error) {
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reject(error);
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} else {
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resolve(result);
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}
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});
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});
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const readJSON =
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/*#__PURE__*/
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function () {
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var _ref3 = _asyncToGenerator(function* (from) {
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return JSON.parse((yield readFile(from)));
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});
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return function readJSON(_x6) {
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return _ref3.apply(this, arguments);
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};
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}();
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function transformValueAST(root, customProperties) {
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if (root.nodes && root.nodes.length) {
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root.nodes.slice().forEach(child => {
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if (isVarFunction(child)) {
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// eslint-disable-next-line no-unused-vars
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const _child$nodes$slice = child.nodes.slice(1, -1),
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propertyNode = _child$nodes$slice[0],
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comma = _child$nodes$slice[1],
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fallbacks = _child$nodes$slice.slice(2);
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const name = propertyNode.value;
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if (name in Object(customProperties)) {
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// conditionally replace a known custom property
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const nodes = asClonedArrayWithBeforeSpacing(customProperties[name], child.raws.before);
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child.replaceWith(...nodes);
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retransformValueAST({
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nodes
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}, customProperties, name);
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} else if (fallbacks.length) {
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// conditionally replace a custom property with a fallback
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const index = root.nodes.indexOf(child);
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if (index !== -1) {
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root.nodes.splice(index, 1, ...asClonedArrayWithBeforeSpacing(fallbacks, child.raws.before));
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}
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transformValueAST(root, customProperties);
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}
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} else {
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transformValueAST(child, customProperties);
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}
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});
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}
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return root;
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} // retransform the current ast without a custom property (to prevent recursion)
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function retransformValueAST(root, customProperties, withoutProperty) {
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const nextCustomProperties = Object.assign({}, customProperties);
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delete nextCustomProperties[withoutProperty];
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return transformValueAST(root, nextCustomProperties);
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} // match var() functions
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const varRegExp = /^var$/i; // whether the node is a var() function
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const isVarFunction = node => node.type === 'func' && varRegExp.test(node.value) && Object(node.nodes).length > 0; // return an array with its nodes cloned, preserving the raw
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const asClonedArrayWithBeforeSpacing = (array, beforeSpacing) => {
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const clonedArray = asClonedArray(array, null);
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if (clonedArray[0]) {
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clonedArray[0].raws.before = beforeSpacing;
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}
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return clonedArray;
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}; // return an array with its nodes cloned
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const asClonedArray = (array, parent) => array.map(node => asClonedNode(node, parent)); // return a cloned node
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const asClonedNode = (node, parent) => {
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const cloneNode = new node.constructor(node);
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for (const key in node) {
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if (key === 'parent') {
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cloneNode.parent = parent;
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} else if (Object(node[key]).constructor === Array) {
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cloneNode[key] = asClonedArray(node.nodes, cloneNode);
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} else if (Object(node[key]).constructor === Object) {
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cloneNode[key] = Object.assign({}, node[key]);
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}
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}
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return cloneNode;
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};
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var transformProperties = ((root, customProperties, opts) => {
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// walk decls that can be transformed
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root.walkDecls(decl => {
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if (isTransformableDecl(decl) && !isRuleIgnored(decl)) {
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const originalValue = decl.value;
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const valueAST = parse(originalValue);
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const value = String(transformValueAST(valueAST, customProperties)); // conditionally transform values that have changed
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if (value !== originalValue) {
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if (opts.preserve) {
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decl.cloneBefore({
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value
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});
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} else {
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decl.value = value;
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}
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}
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}
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});
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}); // match custom properties
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const customPropertyRegExp$1 = /^--[A-z][\w-]*$/; // match custom property inclusions
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const customPropertiesRegExp = /(^|[^\w-])var\([\W\w]+\)/; // whether the declaration should be potentially transformed
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const isTransformableDecl = decl => !customPropertyRegExp$1.test(decl.prop) && customPropertiesRegExp.test(decl.value);
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/* Write Custom Properties to CSS File
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/* ========================================================================== */
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function writeCustomPropertiesToCssFile(_x, _x2) {
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return _writeCustomPropertiesToCssFile.apply(this, arguments);
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}
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/* Write Custom Properties to JSON file
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/* ========================================================================== */
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function _writeCustomPropertiesToCssFile() {
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_writeCustomPropertiesToCssFile = _asyncToGenerator(function* (to, customProperties) {
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const cssContent = Object.keys(customProperties).reduce((cssLines, name) => {
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cssLines.push(`\t${name}: ${customProperties[name]};`);
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return cssLines;
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}, []).join('\n');
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const css = `:root {\n${cssContent}\n}\n`;
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yield writeFile(to, css);
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});
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return _writeCustomPropertiesToCssFile.apply(this, arguments);
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}
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function writeCustomPropertiesToJsonFile(_x3, _x4) {
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return _writeCustomPropertiesToJsonFile.apply(this, arguments);
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}
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/* Write Custom Properties to Common JS file
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/* ========================================================================== */
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function _writeCustomPropertiesToJsonFile() {
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_writeCustomPropertiesToJsonFile = _asyncToGenerator(function* (to, customProperties) {
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const jsonContent = JSON.stringify({
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'custom-properties': customProperties
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}, null, ' ');
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const json = `${jsonContent}\n`;
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yield writeFile(to, json);
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});
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return _writeCustomPropertiesToJsonFile.apply(this, arguments);
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}
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|
function writeCustomPropertiesToCjsFile(_x5, _x6) {
|
||
|
|
return _writeCustomPropertiesToCjsFile.apply(this, arguments);
|
||
|
|
}
|
||
|
|
/* Write Custom Properties to Module JS file
|
||
|
|
/* ========================================================================== */
|
||
|
|
|
||
|
|
|
||
|
|
function _writeCustomPropertiesToCjsFile() {
|
||
|
|
_writeCustomPropertiesToCjsFile = _asyncToGenerator(function* (to, customProperties) {
|
||
|
|
const jsContents = Object.keys(customProperties).reduce((jsLines, name) => {
|
||
|
|
jsLines.push(`\t\t'${escapeForJS(name)}': '${escapeForJS(customProperties[name])}'`);
|
||
|
|
return jsLines;
|
||
|
|
}, []).join(',\n');
|
||
|
|
const js = `module.exports = {\n\tcustomProperties: {\n${jsContents}\n\t}\n};\n`;
|
||
|
|
yield writeFile(to, js);
|
||
|
|
});
|
||
|
|
return _writeCustomPropertiesToCjsFile.apply(this, arguments);
|
||
|
|
}
|
||
|
|
|
||
|
|
function writeCustomPropertiesToMjsFile(_x7, _x8) {
|
||
|
|
return _writeCustomPropertiesToMjsFile.apply(this, arguments);
|
||
|
|
}
|
||
|
|
/* Write Custom Properties to Exports
|
||
|
|
/* ========================================================================== */
|
||
|
|
|
||
|
|
|
||
|
|
function _writeCustomPropertiesToMjsFile() {
|
||
|
|
_writeCustomPropertiesToMjsFile = _asyncToGenerator(function* (to, customProperties) {
|
||
|
|
const mjsContents = Object.keys(customProperties).reduce((mjsLines, name) => {
|
||
|
|
mjsLines.push(`\t'${escapeForJS(name)}': '${escapeForJS(customProperties[name])}'`);
|
||
|
|
return mjsLines;
|
||
|
|
}, []).join(',\n');
|
||
|
|
const mjs = `export const customProperties = {\n${mjsContents}\n};\n`;
|
||
|
|
yield writeFile(to, mjs);
|
||
|
|
});
|
||
|
|
return _writeCustomPropertiesToMjsFile.apply(this, arguments);
|
||
|
|
}
|
||
|
|
|
||
|
|
function writeCustomPropertiesToExports(customProperties, destinations) {
|
||
|
|
return Promise.all(destinations.map(
|
||
|
|
/*#__PURE__*/
|
||
|
|
function () {
|
||
|
|
var _ref = _asyncToGenerator(function* (destination) {
|
||
|
|
if (destination instanceof Function) {
|
||
|
|
yield destination(defaultCustomPropertiesToJSON(customProperties));
|
||
|
|
} else {
|
||
|
|
// read the destination as an object
|
||
|
|
const opts = destination === Object(destination) ? destination : {
|
||
|
|
to: String(destination)
|
||
|
|
}; // transformer for Custom Properties into a JSON-compatible object
|
||
|
|
|
||
|
|
const toJSON = opts.toJSON || defaultCustomPropertiesToJSON;
|
||
|
|
|
||
|
|
if ('customProperties' in opts) {
|
||
|
|
// write directly to an object as customProperties
|
||
|
|
opts.customProperties = toJSON(customProperties);
|
||
|
|
} else if ('custom-properties' in opts) {
|
||
|
|
// write directly to an object as custom-properties
|
||
|
|
opts['custom-properties'] = toJSON(customProperties);
|
||
|
|
} else {
|
||
|
|
// destination pathname
|
||
|
|
const to = String(opts.to || ''); // type of file being written to
|
||
|
|
|
||
|
|
const type = (opts.type || path.extname(opts.to).slice(1)).toLowerCase(); // transformed Custom Properties
|
||
|
|
|
||
|
|
const customPropertiesJSON = toJSON(customProperties);
|
||
|
|
|
||
|
|
if (type === 'css') {
|
||
|
|
yield writeCustomPropertiesToCssFile(to, customPropertiesJSON);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (type === 'js') {
|
||
|
|
yield writeCustomPropertiesToCjsFile(to, customPropertiesJSON);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (type === 'json') {
|
||
|
|
yield writeCustomPropertiesToJsonFile(to, customPropertiesJSON);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (type === 'mjs') {
|
||
|
|
yield writeCustomPropertiesToMjsFile(to, customPropertiesJSON);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
return function (_x9) {
|
||
|
|
return _ref.apply(this, arguments);
|
||
|
|
};
|
||
|
|
}()));
|
||
|
|
}
|
||
|
|
/* Helper utilities
|
||
|
|
/* ========================================================================== */
|
||
|
|
|
||
|
|
const defaultCustomPropertiesToJSON = customProperties => {
|
||
|
|
return Object.keys(customProperties).reduce((customPropertiesJSON, key) => {
|
||
|
|
customPropertiesJSON[key] = String(customProperties[key]);
|
||
|
|
return customPropertiesJSON;
|
||
|
|
}, {});
|
||
|
|
};
|
||
|
|
|
||
|
|
const writeFile = (to, text) => new Promise((resolve, reject) => {
|
||
|
|
fs.writeFile(to, text, error => {
|
||
|
|
if (error) {
|
||
|
|
reject(error);
|
||
|
|
} else {
|
||
|
|
resolve();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
const escapeForJS = string => string.replace(/\\([\s\S])|(')/g, '\\$1$2').replace(/\n/g, '\\n').replace(/\r/g, '\\r');
|
||
|
|
|
||
|
|
var index = postcss.plugin('postcss-custom-properties', opts => {
|
||
|
|
// whether to preserve custom selectors and rules using them
|
||
|
|
const preserve = 'preserve' in Object(opts) ? Boolean(opts.preserve) : true; // sources to import custom selectors from
|
||
|
|
|
||
|
|
const importFrom = [].concat(Object(opts).importFrom || []); // destinations to export custom selectors to
|
||
|
|
|
||
|
|
const exportTo = [].concat(Object(opts).exportTo || []); // promise any custom selectors are imported
|
||
|
|
|
||
|
|
const customPropertiesPromise = getCustomPropertiesFromImports(importFrom); // synchronous transform
|
||
|
|
|
||
|
|
const syncTransform = root => {
|
||
|
|
const customProperties = getCustomPropertiesFromRoot(root, {
|
||
|
|
preserve
|
||
|
|
});
|
||
|
|
transformProperties(root, customProperties, {
|
||
|
|
preserve
|
||
|
|
});
|
||
|
|
}; // asynchronous transform
|
||
|
|
|
||
|
|
|
||
|
|
const asyncTransform =
|
||
|
|
/*#__PURE__*/
|
||
|
|
function () {
|
||
|
|
var _ref = _asyncToGenerator(function* (root) {
|
||
|
|
const customProperties = Object.assign({}, (yield customPropertiesPromise), getCustomPropertiesFromRoot(root, {
|
||
|
|
preserve
|
||
|
|
}));
|
||
|
|
yield writeCustomPropertiesToExports(customProperties, exportTo);
|
||
|
|
transformProperties(root, customProperties, {
|
||
|
|
preserve
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
return function asyncTransform(_x) {
|
||
|
|
return _ref.apply(this, arguments);
|
||
|
|
};
|
||
|
|
}(); // whether to return synchronous function if no asynchronous operations are requested
|
||
|
|
|
||
|
|
|
||
|
|
const canReturnSyncFunction = importFrom.length === 0 && exportTo.length === 0;
|
||
|
|
return canReturnSyncFunction ? syncTransform : asyncTransform;
|
||
|
|
});
|
||
|
|
|
||
|
|
export default index;
|
||
|
|
//# sourceMappingURL=index.esm.mjs.map
|