/*

MIT License http://www.opensource.org/licenses/mit-license.php

Author Tobias Koppers @sokra

*/

var ContextDependencyHelpers = exports;

ContextDependencyHelpers.create = function(Dep, range, param, expr) {

if(param.isWrapped() && param.prefix.isString()) {

var prefix = param.prefix.string;

var postfix = param.postfix.isString() ? param.postfix.string : "";

var prefixRange = param.prefix.range;

var valueRange = [prefixRange[1], param.range[1]];

var idx = prefix.lastIndexOf("/");

var context = ".";

if(idx >= 0) {

context = prefix.substr(0, idx);

prefix = "." + prefix.substr(idx);

}

var regExp = new RegExp("^" +

prefix.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&") +

".*" +

postfix.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&") + "$");

var dep = new Dep(context, true, regExp, range, valueRange);

dep.loc = expr.loc;

dep.prepend = prefix;

return dep;

} else {

var dep = new Dep(".", true, /^\.\/.*$/, range, param.range);

dep.loc = expr.loc;

dep.critical = true;

return dep;

}

};