/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012-2017 gnosygnu@gmail.com
XOWA is licensed under the terms of the General Public License (GPL) Version 3,
or alternatively under the terms of the Apache License Version 2.0.
You may use XOWA according to either of these licenses as is most appropriate
for your project on a case-by-case basis.
The terms of each license can be found in the source code repository:
GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
*/
package gplx.xowa.bldrs.css; import gplx.*; import gplx.xowa.*; import gplx.xowa.bldrs.*;
import gplx.core.primitives.*; import gplx.core.btries.*;
class Xob_url_fixer {
public static byte[] Fix(byte[] site, byte[] src, int src_len) { // return "site/img.png" if "//site/img.png" or "http://site/img.png"; also, handle "img.png?key=val"
int bgn = 0; int bgn_tkn_tid = 0;
Object o = Xob_url_fixer_tkn.Bgn_trie().Match_bgn(src, bgn, src_len);
if (o != null) {
Xob_url_fixer_tkn tkn = (Xob_url_fixer_tkn)o;
bgn_tkn_tid = tkn.Tid();
switch (bgn_tkn_tid) {
case Xob_url_fixer_tkn.Tid_bgn_slash_2:
case Xob_url_fixer_tkn.Tid_bgn_http:
case Xob_url_fixer_tkn.Tid_bgn_https:
bgn = tkn.Raw_len(); // remove "//", "http://", "https://"
break;
case Xob_url_fixer_tkn.Tid_bgn_slash_1: // convert "/a" to "site/a"
src = Bry_.Add(site, src);
src_len = src.length;
break;
}
}
int pos = bgn, end = src_len; boolean no_slashes = true;
Btrie_slim_mgr mid_trie = Xob_url_fixer_tkn.Mid_trie();
int[] seg_ary = new int[gplx.xowa.xtns.pfuncs.ttls.Pfunc_rel2abs.Ttl_max];
while (pos < src_len) {
byte b = src[pos];
o = mid_trie.Match_bgn_w_byte(b, src, pos, src_len);
if (o != null) {
Xob_url_fixer_tkn tkn = (Xob_url_fixer_tkn)o;
switch (tkn.Tid()) {
case Xob_url_fixer_tkn.Tid_mid_slash: if (no_slashes) no_slashes = false; break;
case Xob_url_fixer_tkn.Tid_mid_question: end = pos; pos = src_len; break;
case Xob_url_fixer_tkn.Tid_mid_rel_1:
case Xob_url_fixer_tkn.Tid_mid_rel_2:
Bry_bfr tmp_bfr = Bry_bfr_.New_w_size(src_len);
byte[] to_rel_root = Bry_.Mid(src, bgn, pos);
byte[] to_rel_qry = Bry_.Mid(src, pos, src_len);
src = gplx.xowa.xtns.pfuncs.ttls.Pfunc_rel2abs.Rel2abs(tmp_bfr, seg_ary, to_rel_qry, to_rel_root, Int_obj_ref.New_neg1());
bgn = pos = 0;
end = src_len = src.length;
no_slashes = true;
break;
}
}
++pos;
}
if (no_slashes) return null; // invalid; EX: "//site"
return Bry_.Mid(src, bgn, end);
}
}
class Xob_url_fixer_tkn {
public Xob_url_fixer_tkn(int tid, byte[] raw) {this.tid = tid; this.raw = raw; this.raw_len = raw.length;}
public int Tid() {return tid;} private int tid;
public byte[] Raw() {return raw;} private byte[] raw;
public int Raw_len() {return raw_len;} private int raw_len;
public static Xob_url_fixer_tkn new_(int tid, String raw) {return new Xob_url_fixer_tkn(tid, Bry_.new_u8(raw));}
private static void trie_add(Btrie_slim_mgr trie, int tid, String s) {trie.Add_obj(s, new_(tid, s));}
public static final int Tid_bgn_slash_1 = 1, Tid_bgn_slash_2 = 2, Tid_bgn_http = 3, Tid_bgn_https = 4;
private static Btrie_slim_mgr bgn_trie;
public static Btrie_slim_mgr Bgn_trie() {
if (bgn_trie == null) {
bgn_trie = Btrie_slim_mgr.ci_a7();
trie_add(bgn_trie, Tid_bgn_slash_1 , "/");
trie_add(bgn_trie, Tid_bgn_slash_2 , "//");
trie_add(bgn_trie, Tid_bgn_http , "http://");
trie_add(bgn_trie, Tid_bgn_https , "https://");
}
return bgn_trie;
}
public static final int Tid_mid_rel_1 = 1, Tid_mid_rel_2 = 2, Tid_mid_slash = 3, Tid_mid_question = 4;
private static Btrie_slim_mgr mid_trie;
public static Btrie_slim_mgr Mid_trie() {
if (mid_trie == null) {
mid_trie = Btrie_slim_mgr.ci_a7();
trie_add(mid_trie, Tid_mid_rel_1 , "/../");
trie_add(mid_trie, Tid_mid_rel_2 , "/./");
trie_add(mid_trie, Tid_mid_slash , "/");
trie_add(mid_trie, Tid_mid_question , "?");
}
return mid_trie;
}
}