codenothing/CSSCompressor

/**
 * 
 * Atrule URL Trim
 * 
 * @author: Corey Hart <http://www.codenothing.com>
 * @description: Converts at-rule one liner url's to strings
 * 
 * @before:
 *     @import url(other.css)
 * 
 * @after:
 *     @import "other.css"
 * 
 */

var CSSCompressor = global.CSSCompressor,
    rurl = /^url\((.*?)\)$/i,
    rurls = /^url\('(.*?)'\)$/i,
    rurld = /^url\("(.*?)"\)$/i;

CSSCompressor.rule({

    name: 'Atrule URL Trim',
    type: CSSCompressor.RULE_TYPE_BLOCK,
    group: 'Misc',
    description: "Converts at-rule one liner url's to strings",

    callback: function( branch, compressor ) {
        if ( ! branch.atrule || ! branch.parts.length || ( branch.rules && branch.rules.length > 0 ) ) {
            return;
        }

        branch.parts.forEach(function( part, i ) {
            var m = rurld.exec( part ) || rurls.exec( part ) || rurl.exec( part );

            if ( m ) {
                branch.parts[ i ] = '"' + m[ 1 ] + '"';
                compressor.log(
                    "Converting @import url '" + part + "' => '" + branch.parts[ i ] + "'",
                    branch.position
                );
            }
        });
    }

});