1 files changed, 15 insertions, 4 deletions

diff --git a/ui-commit.c b/ui-commit.c
index ce33cf9..b3d1c28 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -1,228 +1,239 @@
 /* ui-commit.c: generate commit view
  *
  * Copyright (C) 2006 Lars Hjemli
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  */
 
 #include "cgit.h"
 
 int files = 0, slots = 0;
 int total_adds = 0, total_rems = 0, max_changes = 0;
 int lines_added, lines_removed;
 
 struct fileinfo {
         char status;
         unsigned char old_sha1[20];
         unsigned char new_sha1[20];
         unsigned short old_mode;
         unsigned short new_mode;
         char *old_path;
         char *new_path;
         unsigned int added;
         unsigned int removed;
 } *items;
 
 
 void print_fileinfo(struct fileinfo *info)
 {
         char *query, *query2;
         char *class;
         double width;
 
         switch (info->status) {
         case DIFF_STATUS_ADDED:
                 class = "add";
                 break;
         case DIFF_STATUS_COPIED:
                 class = "cpy";
                 break;
         case DIFF_STATUS_DELETED:
                 class = "del";
                 break;
         case DIFF_STATUS_MODIFIED:
                 class = "upd";
                 break;
         case DIFF_STATUS_RENAMED:
                 class = "mov";
                 break;
         case DIFF_STATUS_TYPE_CHANGED:
                 class = "typ";
                 break;
         case DIFF_STATUS_UNKNOWN:
                 class = "unk";
                 break;
         case DIFF_STATUS_UNMERGED:
                 class = "stg";
                 break;
         default:
                 die("bug: unhandled diff status %c", info->status);
         }
 
         html("<tr>");
         htmlf("<td class='mode'>");
         if (is_null_sha1(info->new_sha1)) {
                 html_filemode(info->old_mode);
         } else {
                 html_filemode(info->new_mode);
         }
 
         if (info->old_mode != info->new_mode &&
             !is_null_sha1(info->old_sha1) &&
             !is_null_sha1(info->new_sha1)) {
                 html("<span class='modechange'>[");
                 html_filemode(info->old_mode);
                 html("]</span>");
         }
         htmlf("</td><td class='%s'>", class);
-        query = fmt("id=%s&id2=%s", sha1_to_hex(info->old_sha1),
-                    sha1_to_hex(info->new_sha1));
+        query = fmt("id=%s&id2=%s&path=%s", sha1_to_hex(info->old_sha1),
+                    sha1_to_hex(info->new_sha1), info->new_path);
         html_link_open(cgit_pageurl(cgit_query_repo, "diff", query),
                        NULL, NULL);
         if (info->status == DIFF_STATUS_COPIED ||
             info->status == DIFF_STATUS_RENAMED) {
                 html_txt(info->new_path);
                 htmlf("</a> (%s from ", info->status == DIFF_STATUS_COPIED ?
                       "copied" : "renamed");
                 query2 = fmt("id=%s", sha1_to_hex(info->old_sha1));
                 html_link_open(cgit_pageurl(cgit_query_repo, "view", query2),
                                NULL, NULL);
                 html_txt(info->old_path);
                 html("</a>)");
         } else {
                 html_txt(info->new_path);
                 html("</a>");
         }
         html("</td><td class='right'>");
         htmlf("%d", info->added + info->removed);
 
         html("</td><td class='graph'>");
         width = (info->added + info->removed) * 100.0 / max_changes;
         if (width < 0.1)
                 width = 0.1;
         html_link_open(cgit_pageurl(cgit_query_repo, "diff", query),
                        NULL, NULL);
         htmlf("<img src='/cgit/add.png' style='width: %.1f%%;'/>",
               info->added * width / (info->added + info->removed));
         htmlf("<img src='/cgit/del.png' style='width: %.1f%%;'/>",
               info->removed * width / (info->added + info->removed));
         html("</a></td></tr>\n");
 }
 
 void cgit_count_diff_lines(char *line, int len)
 {
         if (line && (len > 0)) {
                 if (line[0] == '+')
                         lines_added++;
                 else if (line[0] == '-')
                         lines_removed++;
         }
 }
 
 void inspect_filepair(struct diff_filepair *pair)
 {
         files++;
         lines_added = 0;
         lines_removed = 0;
         cgit_diff_files(pair->one->sha1, pair->two->sha1, cgit_count_diff_lines);
         if (files >= slots) {
                 if (slots == 0)
                         slots = 4;
                 else
                         slots = slots * 2;
                 items = xrealloc(items, slots * sizeof(struct fileinfo));
         }
         items[files-1].status = pair->status;
         hashcpy(items[files-1].old_sha1, pair->one->sha1);
         hashcpy(items[files-1].new_sha1, pair->two->sha1);
         items[files-1].old_mode = pair->one->mode;
         items[files-1].new_mode = pair->two->mode;
         items[files-1].old_path = xstrdup(pair->one->path);
         items[files-1].new_path = xstrdup(pair->two->path);
         items[files-1].added = lines_added;
         items[files-1].removed = lines_removed;
         if (lines_added + lines_removed > max_changes)
                 max_changes = lines_added + lines_removed;
         total_adds += lines_added;
         total_rems += lines_removed;
 }
 
 
 void cgit_print_commit(const char *hex)
 {
-        struct commit *commit;
+        struct commit *commit, *parent;
         struct commitinfo *info;
         struct commit_list *p;
         unsigned char sha1[20];
         char *query;
         char *filename;
         int i;
 
         if (get_sha1(hex, sha1)) {
                 cgit_print_error(fmt("Bad object id: %s", hex));
                 return;
         }
         commit = lookup_commit_reference(sha1);
         if (!commit) {
                 cgit_print_error(fmt("Bad commit reference: %s", hex));
                 return;
         }
         info = cgit_parse_commit(commit);
 
         html("<table class='commit-info'>\n");
         html("<tr><th>author</th><td>");
         html_txt(info->author);
         html(" ");
         html_txt(info->author_email);
         html("</td><td class='right'>");
         cgit_print_date(info->author_date);
         html("</td></tr>\n");
         html("<tr><th>committer</th><td>");
         html_txt(info->committer);
         html(" ");
         html_txt(info->committer_email);
         html("</td><td class='right'>");
         cgit_print_date(info->committer_date);
         html("</td></tr>\n");
         html("<tr><th>tree</th><td colspan='2' class='sha1'><a href='");
         query = fmt("id=%s", sha1_to_hex(commit->tree->object.sha1));
         html_attr(cgit_pageurl(cgit_query_repo, "tree", query));
         htmlf("'>%s</a></td></tr>\n", sha1_to_hex(commit->tree->object.sha1));
               for (p = commit->parents; p ; p = p->next) {
+                parent = lookup_commit_reference(p->item->object.sha1);
+                if (!parent) {
+                        html("<tr><td colspan='3'>");
+                        cgit_print_error("Error reading parent commit");
+                        html("</td></tr>");
+                        continue;
+                }
                 html("<tr><th>parent</th>"
                      "<td colspan='2' class='sha1'>"
                      "<a href='");
                 query = fmt("id=%s", sha1_to_hex(p->item->object.sha1));
                 html_attr(cgit_pageurl(cgit_query_repo, "commit", query));
-                htmlf("'>%s</a></td></tr>\n",
+                htmlf("'>%s</a> (<a href='",
                       sha1_to_hex(p->item->object.sha1));
+                query = fmt("id=%s&id2=%s", sha1_to_hex(parent->tree->object.sha1),
+                            sha1_to_hex(commit->tree->object.sha1));
+                html_attr(cgit_pageurl(cgit_query_repo, "diff", query));
+                html("'>diff</a>)</td></tr>");
         }
         if (cgit_repo->snapshots) {
                 htmlf("<tr><th>download</th><td colspan='2' class='sha1'><a href='");
                 filename = fmt("%s-%s.zip", cgit_query_repo, hex);
                 html_attr(cgit_pageurl(cgit_query_repo, "snapshot",
                                        fmt("id=%s&name=%s", hex, filename)));
                 htmlf("'>%s</a></td></tr>", filename);
         }
         html("</table>\n");
         html("<div class='commit-subject'>");
         html_txt(info->subject);
         html("</div>");
         html("<div class='commit-msg'>");
         html_txt(info->msg);
         html("</div>");
         if (!(commit->parents && commit->parents->next && commit->parents->next->next)) {
                 html("<table class='diffstat'>");
                 max_changes = 0;
                 cgit_diff_commit(commit, inspect_filepair);
                 for(i = 0; i<files; i++)
                         print_fileinfo(&items[i]);
                 html("</table>");
                 html("<div class='diffstat-summary'>");
                 htmlf("%d files changed, %d insertions, %d deletions\n",
                       files, total_adds, total_rems);
                 html("</div>");
         }
         cgit_free_commitinfo(info);
 }