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Add graphical diffstat to commit view
[ps-cgit] / ui-commit.c
1 /* ui-commit.c: generate commit view
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 int files = 0, slots = 0;
12 int total_adds = 0, total_rems = 0, max_changes = 0;
13 int lines_added, lines_removed;
14
15 struct fileinfo {
16         char status;
17         unsigned char old_sha1[20];
18         unsigned char new_sha1[20];
19         unsigned short old_mode;
20         unsigned short new_mode;
21         char *old_path;
22         char *new_path;
23         unsigned int added;
24         unsigned int removed;
25 } *items;
26
27
28 void print_fileinfo(struct fileinfo *info)
29 {
30         char *query, *query2;
31         char *class;
32         double width;
33
34         switch (info->status) {
35         case DIFF_STATUS_ADDED:
36                 class = "add";
37                 break;
38         case DIFF_STATUS_COPIED:
39                 class = "cpy";
40                 break;
41         case DIFF_STATUS_DELETED:
42                 class = "del";
43                 break;
44         case DIFF_STATUS_MODIFIED:
45                 class = "upd";
46                 break;
47         case DIFF_STATUS_RENAMED:
48                 class = "mov";
49                 break;
50         case DIFF_STATUS_TYPE_CHANGED:
51                 class = "typ";
52                 break;
53         case DIFF_STATUS_UNKNOWN:
54                 class = "unk";
55                 break;
56         case DIFF_STATUS_UNMERGED:
57                 class = "stg";
58                 break;
59         default:
60                 die("bug: unhandled diff status %c", info->status);
61         }
62
63         html("<tr>");
64         htmlf("<td class='mode'>");
65         if (is_null_sha1(info->new_sha1)) {
66                 html_filemode(info->old_mode);
67         } else {
68                 html_filemode(info->new_mode);
69         }
70
71         if (info->old_mode != info->new_mode &&
72             !is_null_sha1(info->old_sha1) &&
73             !is_null_sha1(info->new_sha1)) {
74                 html("<span class='modechange'>[");
75                 html_filemode(info->old_mode);
76                 html("]</span>");
77         }
78         htmlf("</td><td class='%s'>", class);
79         query = fmt("id=%s&id2=%s", sha1_to_hex(info->old_sha1),
80                     sha1_to_hex(info->new_sha1));
81         html_link_open(cgit_pageurl(cgit_query_repo, "diff", query),
82                        NULL, NULL);
83         if (info->status == DIFF_STATUS_COPIED ||
84             info->status == DIFF_STATUS_RENAMED) {
85                 html_txt(info->new_path);
86                 htmlf("</a> (%s from ", info->status == DIFF_STATUS_COPIED ?
87                       "copied" : "renamed");
88                 query2 = fmt("id=%s", sha1_to_hex(info->old_sha1));
89                 html_link_open(cgit_pageurl(cgit_query_repo, "view", query2),
90                                NULL, NULL);
91                 html_txt(info->old_path);
92                 html("</a>)");
93         } else {
94                 html_txt(info->new_path);
95                 html("</a>");
96         }
97         html("</td><td class='right'>");
98         htmlf("%d", info->added + info->removed);
99
100         html("</td><td class='graph'>");
101         width = (info->added + info->removed) * 100.0 / max_changes;
102         if (width < 0.1)
103                 width = 0.1;
104         html_link_open(cgit_pageurl(cgit_query_repo, "diff", query),
105                        NULL, NULL);
106         htmlf("<img src='/cgit/add.png' style='width: %.1f%%;'/>",
107               info->added * width / (info->added + info->removed));
108         htmlf("<img src='/cgit/del.png' style='width: %.1f%%;'/>",
109               info->removed * width / (info->added + info->removed));
110         html("</a></td></tr>\n");
111 }
112
113 void cgit_count_diff_lines(char *line, int len)
114 {
115         if (line && (len > 0)) {
116                 if (line[0] == '+')
117                         lines_added++;
118                 else if (line[0] == '-')
119                         lines_removed++;
120         }
121 }
122
123 void inspect_filepair(struct diff_filepair *pair)
124 {
125         files++;
126         lines_added = 0;
127         lines_removed = 0;
128         cgit_diff_files(pair->one->sha1, pair->two->sha1, cgit_count_diff_lines);
129         if (files >= slots) {
130                 if (slots == 0)
131                         slots = 4;
132                 else
133                         slots = slots * 2;
134                 items = xrealloc(items, slots * sizeof(struct fileinfo));
135         }
136         items[files-1].status = pair->status;
137         hashcpy(items[files-1].old_sha1, pair->one->sha1);
138         hashcpy(items[files-1].new_sha1, pair->two->sha1);
139         items[files-1].old_mode = pair->one->mode;
140         items[files-1].new_mode = pair->two->mode;
141         items[files-1].old_path = xstrdup(pair->one->path);
142         items[files-1].new_path = xstrdup(pair->two->path);
143         items[files-1].added = lines_added;
144         items[files-1].removed = lines_removed;
145         if (lines_added + lines_removed > max_changes)
146                 max_changes = lines_added + lines_removed;
147         total_adds += lines_added;
148         total_rems += lines_removed;
149 }
150
151
152 void cgit_print_commit(const char *hex)
153 {
154         struct commit *commit;
155         struct commitinfo *info;
156         struct commit_list *p;
157         unsigned char sha1[20];
158         char *query;
159         char *filename;
160         int i;
161
162         if (get_sha1(hex, sha1)) {
163                 cgit_print_error(fmt("Bad object id: %s", hex));
164                 return;
165         }
166         commit = lookup_commit_reference(sha1);
167         if (!commit) {
168                 cgit_print_error(fmt("Bad commit reference: %s", hex));
169                 return;
170         }
171         info = cgit_parse_commit(commit);
172
173         html("<table class='commit-info'>\n");
174         html("<tr><th>author</th><td>");
175         html_txt(info->author);
176         html(" ");
177         html_txt(info->author_email);
178         html("</td><td class='right'>");
179         cgit_print_date(info->author_date);
180         html("</td></tr>\n");
181         html("<tr><th>committer</th><td>");
182         html_txt(info->committer);
183         html(" ");
184         html_txt(info->committer_email);
185         html("</td><td class='right'>");
186         cgit_print_date(info->committer_date);
187         html("</td></tr>\n");
188         html("<tr><th>tree</th><td colspan='2' class='sha1'><a href='");
189         query = fmt("id=%s", sha1_to_hex(commit->tree->object.sha1));
190         html_attr(cgit_pageurl(cgit_query_repo, "tree", query));
191         htmlf("'>%s</a></td></tr>\n", sha1_to_hex(commit->tree->object.sha1));
192         for (p = commit->parents; p ; p = p->next) {
193                 html("<tr><th>parent</th>"
194                      "<td colspan='2' class='sha1'>"
195                      "<a href='");
196                 query = fmt("id=%s", sha1_to_hex(p->item->object.sha1));
197                 html_attr(cgit_pageurl(cgit_query_repo, "commit", query));
198                 htmlf("'>%s</a></td></tr>\n",
199                       sha1_to_hex(p->item->object.sha1));
200         }
201         if (cgit_repo->snapshots) {
202                 htmlf("<tr><th>download</th><td colspan='2' class='sha1'><a href='");
203                 filename = fmt("%s-%s.zip", cgit_query_repo, hex);
204                 html_attr(cgit_pageurl(cgit_query_repo, "snapshot",
205                                        fmt("id=%s&name=%s", hex, filename)));
206                 htmlf("'>%s</a></td></tr>", filename);
207         }
208         html("</table>\n");
209         html("<div class='commit-subject'>");
210         html_txt(info->subject);
211         html("</div>");
212         html("<div class='commit-msg'>");
213         html_txt(info->msg);
214         html("</div>");
215         if (!(commit->parents && commit->parents->next && commit->parents->next->next)) {
216                 html("<table class='diffstat'>");
217                 max_changes = 0;
218                 cgit_diff_commit(commit, inspect_filepair);
219                 for(i = 0; i<files; i++)
220                         print_fileinfo(&items[i]);
221                 html("</table>");
222                 html("<div class='diffstat-summary'>");
223                 htmlf("%d files changed, %d insertions, %d deletions\n",
224                       files, total_adds, total_rems);
225                 html("</div>");
226         }
227         cgit_free_commitinfo(info);
228 }