"use strict";
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var browserslist = require('browserslist');
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var postcss = require('postcss');
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var agents = require('caniuse-lite').agents;
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var pico = require('picocolors');
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var Browsers = require('./browsers');
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var Prefixes = require('./prefixes');
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var data = require('../data/prefixes');
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var info = require('./info');
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var WARNING = '\n' + ' Replace Autoprefixer `browsers` option to Browserslist config.\n' + ' Use `browserslist` key in `package.json` or `.browserslistrc` file.\n' + '\n' + ' Using `browsers` option can cause errors. Browserslist config \n' + ' can be used for Babel, Autoprefixer, postcss-normalize and other tools.\n' + '\n' + ' If you really need to use option, rename it to `overrideBrowserslist`.\n' + '\n' + ' Learn more at:\n' + ' https://github.com/browserslist/browserslist#readme\n' + ' https://twitter.com/browserslist\n' + '\n';
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function isPlainObject(obj) {
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return Object.prototype.toString.apply(obj) === '[object Object]';
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}
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var cache = {};
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function timeCapsule(result, prefixes) {
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if (prefixes.browsers.selected.length === 0) {
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return;
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}
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if (prefixes.add.selectors.length > 0) {
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return;
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}
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if (Object.keys(prefixes.add).length > 2) {
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return;
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}
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/* istanbul ignore next */
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result.warn('Greetings, time traveller. ' + 'We are in the golden age of prefix-less CSS, ' + 'where Autoprefixer is no longer needed for your stylesheet.');
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}
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module.exports = postcss.plugin('autoprefixer', function () {
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for (var _len = arguments.length, reqs = new Array(_len), _key = 0; _key < _len; _key++) {
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reqs[_key] = arguments[_key];
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}
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var options;
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if (reqs.length === 1 && isPlainObject(reqs[0])) {
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options = reqs[0];
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reqs = undefined;
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} else if (reqs.length === 0 || reqs.length === 1 && !reqs[0]) {
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reqs = undefined;
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} else if (reqs.length <= 2 && (Array.isArray(reqs[0]) || !reqs[0])) {
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options = reqs[1];
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reqs = reqs[0];
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} else if (typeof reqs[reqs.length - 1] === 'object') {
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options = reqs.pop();
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}
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if (!options) {
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options = {};
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}
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if (options.browser) {
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throw new Error('Change `browser` option to `overrideBrowserslist` in Autoprefixer');
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} else if (options.browserslist) {
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throw new Error('Change `browserslist` option to `overrideBrowserslist` in Autoprefixer');
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}
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if (options.overrideBrowserslist) {
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reqs = options.overrideBrowserslist;
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} else if (options.browsers) {
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if (typeof console !== 'undefined' && console.warn) {
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console.warn(pico.red(WARNING.replace(/`[^`]+`/g, function (i) {
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return pico.yellow(i.slice(1, -1));
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})));
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}
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reqs = options.browsers;
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}
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var brwlstOpts = {
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ignoreUnknownVersions: options.ignoreUnknownVersions,
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stats: options.stats,
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env: options.env
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};
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function loadPrefixes(opts) {
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var d = module.exports.data;
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var browsers = new Browsers(d.browsers, reqs, opts, brwlstOpts);
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var key = browsers.selected.join(', ') + JSON.stringify(options);
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if (!cache[key]) {
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cache[key] = new Prefixes(d.prefixes, browsers, options);
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}
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return cache[key];
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}
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function plugin(css, result) {
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var prefixes = loadPrefixes({
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from: css.source && css.source.input.file,
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env: options.env
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});
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timeCapsule(result, prefixes);
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if (options.remove !== false) {
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prefixes.processor.remove(css, result);
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}
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if (options.add !== false) {
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prefixes.processor.add(css, result);
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}
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}
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plugin.options = options;
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plugin.browsers = reqs;
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plugin.info = function (opts) {
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opts = opts || {};
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opts.from = opts.from || process.cwd();
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return info(loadPrefixes(opts));
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};
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return plugin;
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});
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/**
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* Autoprefixer data
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*/
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module.exports.data = {
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browsers: agents,
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prefixes: data
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};
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/**
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* Autoprefixer default browsers
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*/
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module.exports.defaults = browserslist.defaults;
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/**
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* Inspect with default Autoprefixer
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*/
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module.exports.info = function () {
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return module.exports().info();
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};
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