urls.js
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module.exports = function Urls() {
var urls = [];
return {
// Strip urls by replacing them by the __URL__
// marker for further restoring. It's done via string scanning
// instead of regexps to speed up the process.
escape: function(data) {
var nextStart = 0;
var nextEnd = 0;
var cursor = 0;
var tempData = [];
for (; nextEnd < data.length; ) {
nextStart = data.indexOf('url(', nextEnd);
if (nextStart == -1)
break;
nextEnd = data.indexOf(')', nextStart);
tempData.push(data.substring(cursor, nextStart));
tempData.push('__URL__');
urls.push(data.substring(nextStart, nextEnd + 1));
cursor = nextEnd + 1;
}
return tempData.length > 0 ?
tempData.join('') + data.substring(cursor, data.length) :
data;
},
restore: function(data) {
return data.replace(/__URL__/g, function() {
return urls.shift();
});
}
};
};