Function purify

lib/purifycss.js:997–1035

(searchThrough, css, options, callback)

};

var purify = function purify(searchThrough, css, options, callback) {
    if (typeof options === "function") {
        callback = options;
        options = {};
    }
    options = getOptions(options);
    var cssString = FileUtil.filesToSource(css, "css"),
        content = FileUtil.filesToSource(searchThrough, "content");
    PrintUtil.startLog(minify(cssString).length);
    var wordsInContent = getAllWordsInContent(content),
        selectorFilter = new SelectorFilter(wordsInContent, options.whitelist),
        tree = new CssTreeWalker(cssString, [selectorFilter]);
    tree.beginReading();
    var source = tree.toString();

    source = options.minify ? minify(source, options.cleanCssOptions) : source;

    // Option info = true
    if (options.info) {
        if (options.minify) {
            PrintUtil.printInfo(source.length);
        } else {
            PrintUtil.printInfo(minify(source, options.cleanCssOptions).length);
        }
    }

    // Option rejected = true
    if (options.rejected && selectorFilter.rejectedSelectors.length) {
        PrintUtil.printRejected(selectorFilter.rejectedSelectors);
    }

    if (options.output) {
        fs.writeFile(options.output, source, function (err) {
            if (err) return err;
        });
    } else {
        return callback ? callback(source) : source;
    }
};

module.exports = purify;