public static String Resolve_file(boolean use_file_protocol, Io_url root_dir, String file) {
String rv = file;
// resolve relative urls; EX: "./a.js" -> "/xowa/wiki/simple.wikipedia.org/bin/script/a.js"
if (String_.Has_at_bgn(rv, "./")) {
// remove "./"
rv = String_.Mid(rv, 2);
if (use_file_protocol) rv = root_dir.To_http_file_str() + rv;
else {
// if fsys_url && wnt, replace "\" with "/"
if (Op_sys.Cur().Tid_is_wnt())
rv = String_.Replace(rv, Op_sys.Lnx.Fsys_dir_spr_str(), Op_sys.Wnt.Fsys_dir_spr_str());
rv = root_dir.Xto_api() + Op_sys.Cur().Fsys_dir_spr_str() + rv;
}
}
return rv;
}
