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"use strict";
var browserslist = require('browserslist');
var postcss = require('postcss');
var agents = require('caniuse-lite').agents;
var chalk = require('chalk');
var Browsers = require('./browsers');
var Prefixes = require('./prefixes');
var data = require('../data/prefixes');
var info = require('./info');
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 cause some error. 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';
function isPlainObject(obj) {
return Object.prototype.toString.apply(obj) === '[object Object]';
}
var cache = {};
function timeCapsule(result, prefixes) {
if (prefixes.browsers.selected.length === 0) {
return;
}
if (prefixes.add.selectors.length > 0) {
return;
}
if (Object.keys(prefixes.add).length > 2) {
return;
}
/* istanbul ignore next */
result.warn('Greetings, time traveller. ' + 'We are in the golden age of prefix-less CSS, ' + 'where Autoprefixer is no longer needed for your stylesheet.');
}
module.exports = postcss.plugin('autoprefixer', function () {
for (var _len = arguments.length, reqs = new Array(_len), _key = 0; _key < _len; _key++) {
reqs[_key] = arguments[_key];
}
var options;
if (reqs.length === 1 && isPlainObject(reqs[0])) {
options = reqs[0];
reqs = undefined;
} else if (reqs.length === 0 || reqs.length === 1 && !reqs[0]) {
reqs = undefined;
} else if (reqs.length <= 2 && (Array.isArray(reqs[0]) || !reqs[0])) {
options = reqs[1];
reqs = reqs[0];
} else if (typeof reqs[reqs.length - 1] === 'object') {
options = reqs.pop();
}
if (!options) {
options = {};
}
if (options.browser) {
throw new Error('Change `browser` option to `overrideBrowserslist` in Autoprefixer');
} else if (options.browserslist) {
throw new Error('Change `browserslist` option to `overrideBrowserslist` in Autoprefixer');
}
if (options.overrideBrowserslist) {
reqs = options.overrideBrowserslist;
} else if (options.browsers) {
if (typeof console !== 'undefined' && console.warn) {
if (chalk && chalk.red) {
console.warn(chalk.red(WARNING.replace(/`[^`]+`/g, function (i) {
return chalk.yellow(i.slice(1, -1));
})));
} else {
console.warn(WARNING);
}
}
reqs = options.browsers;
}
if (typeof options.grid === 'undefined') {
options.grid = false;
}
var brwlstOpts = {
ignoreUnknownVersions: options.ignoreUnknownVersions,
stats: options.stats
};
function loadPrefixes(opts) {
var d = module.exports.data;
var browsers = new Browsers(d.browsers, reqs, opts, brwlstOpts);
var key = browsers.selected.join(', ') + JSON.stringify(options);
if (!cache[key]) {
cache[key] = new Prefixes(d.prefixes, browsers, options);
}
return cache[key];
}
function plugin(css, result) {
var prefixes = loadPrefixes({
from: css.source && css.source.input.file,
env: options.env
});
timeCapsule(result, prefixes);
if (options.remove !== false) {
prefixes.processor.remove(css, result);
}
if (options.add !== false) {
prefixes.processor.add(css, result);
}
}
plugin.options = options;
plugin.browsers = reqs;
plugin.info = function (opts) {
opts = opts || {};
opts.from = opts.from || process.cwd();
return info(loadPrefixes(opts));
};
return plugin;
});
/**
* Autoprefixer data
*/
module.exports.data = {
browsers: agents,
prefixes: data
};
/**
* Autoprefixer default browsers
*/
module.exports.defaults = browserslist.defaults;
/**
* Inspect with default Autoprefixer
*/
module.exports.info = function () {
return module.exports().info();
};
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