gitweb.ps.run Git - ps-cgit/blob - ui-diff.c

   1 /* ui-diff.c: show diff between two blobs
   2  *
   3  * Copyright (C) 2006 Lars Hjemli
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10
  11
  12 /*
  13  * print a single line returned from xdiff
  14  */
  15 static void print_line(char *line, int len)
  16 {
  17         char *class = "ctx";
  18         char c = line[len-1];
  19
  20         if (line[0] == '+')
  21                 class = "add";
  22         else if (line[0] == '-')
  23                 class = "del";
  24         else if (line[0] == '@')
  25                 class = "hunk";
  26
  27         htmlf("<div class='%s'>", class);
  28         line[len-1] = '\0';
  29         html_txt(line);
  30         html("</div>");
  31         line[len-1] = c;
  32 }
  33
  34 static void filepair_cb(struct diff_filepair *pair)
  35 {
  36         html("<tr><th>");
  37         html_txt(pair->two->path);
  38         html("</th></tr>");
  39         html("<tr><td>");
  40         if (cgit_diff_files(pair->one->sha1, pair->two->sha1, print_line))
  41                 cgit_print_error("Error running diff");
  42         html("</tr></td>");
  43 }
  44
  45 void cgit_print_diff(const char *old_hex, const char *new_hex, char *path)
  46 {
  47         unsigned char sha1[20], sha2[20];
  48         enum object_type type;
  49         unsigned long size;
  50
  51         get_sha1(old_hex, sha1);
  52         get_sha1(new_hex, sha2);
  53
  54         type = sha1_object_info(sha1, &size);
  55         if (type == OBJ_BAD) {
  56                 type = sha1_object_info(sha2, &size);
  57                 if (type == OBJ_BAD) {
  58                         cgit_print_error(fmt("Bad object names: %s, %s", old_hex, new_hex));
  59                         return;
  60                 }
  61         }
  62
  63         html("<table class='diff'>");
  64         switch(type) {
  65         case OBJ_BLOB:
  66                 if (path)
  67                         htmlf("<tr><th>%s</th></tr>", path);
  68                 html("<tr><td>");
  69                 if (cgit_diff_files(sha1, sha2, print_line))
  70                         cgit_print_error("Error running diff");
  71                 html("</tr></td>");
  72                 break;
  73         case OBJ_TREE:
  74                 cgit_diff_tree(sha1, sha2, filepair_cb);
  75                 break;
  76         default:
  77                 cgit_print_error(fmt("Unhandled object type: %s",
  78                                      typename(type)));
  79                 break;
  80         }
  81         html("</td></tr></table>");
  82 }