ui-tree.c

   1 /* ui-tree.c: functions for tree output
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "ui-tree.h"
  11 #include "html.h"
  12 #include "ui-shared.h"
  13
  14 struct walk_tree_context {
  15         char *curr_rev;
  16         char *match_path;
  17         int state;
  18 };
  19
  20 static void print_text_buffer(const char *name, char *buf, unsigned long size)
  21 {
  22         unsigned long lineno, idx;
  23         const char *numberfmt = "<a id='n%1$d' href='#n%1$d'>%1$d</a>\n";
  24
  25         html("<table summary='blob content' class='blob'>\n");
  26
  27         if (ctx.cfg.enable_tree_linenumbers) {
  28                 html("<tr><td class='linenumbers'><pre>");
  29                 idx = 0;
  30                 lineno = 0;
  31
  32                 if (size) {
  33                         htmlf(numberfmt, ++lineno);
  34                         while (idx < size - 1) { // skip absolute last newline
  35                                 if (buf[idx] == '\n')
  36                                         htmlf(numberfmt, ++lineno);
  37                                 idx++;
  38                         }
  39                 }
  40                 html("</pre></td>\n");
  41         }
  42         else {
  43                 html("<tr>\n");
  44         }
  45
  46         if (ctx.repo->source_filter) {
  47                 char *filter_arg = xstrdup(name);
  48                 html("<td class='lines'><pre><code>");
  49                 cgit_open_filter(ctx.repo->source_filter, filter_arg);
  50                 html_raw(buf, size);
  51                 cgit_close_filter(ctx.repo->source_filter);
  52                 free(filter_arg);
  53                 html("</code></pre></td></tr></table>\n");
  54                 return;
  55         }
  56
  57         html("<td class='lines'><pre><code>");
  58         html_txt(buf);
  59         html("</code></pre></td></tr></table>\n");
  60 }
  61
  62 #define ROWLEN 32
  63
  64 static void print_binary_buffer(char *buf, unsigned long size)
  65 {
  66         unsigned long ofs, idx;
  67         static char ascii[ROWLEN + 1];
  68
  69         html("<table summary='blob content' class='bin-blob'>\n");
  70         html("<tr><th>ofs</th><th>hex dump</th><th>ascii</th></tr>");
  71         for (ofs = 0; ofs < size; ofs += ROWLEN, buf += ROWLEN) {
  72                 htmlf("<tr><td class='right'>%04lx</td><td class='hex'>", ofs);
  73                 for (idx = 0; idx < ROWLEN && ofs + idx < size; idx++)
  74                         htmlf("%*s%02x",
  75                               idx == 16 ? 4 : 1, "",
  76                               buf[idx] & 0xff);
  77                 html(" </td><td class='hex'>");
  78                 for (idx = 0; idx < ROWLEN && ofs + idx < size; idx++)
  79                         ascii[idx] = isgraph(buf[idx]) ? buf[idx] : '.';
  80                 ascii[idx] = '\0';
  81                 html_txt(ascii);
  82                 html("</td></tr>\n");
  83         }
  84         html("</table>\n");
  85 }
  86
  87 static void print_object(const unsigned char *sha1, char *path, const char *basename, const char *rev)
  88 {
  89         enum object_type type;
  90         char *buf;
  91         unsigned long size;
  92
  93         type = sha1_object_info(sha1, &size);
  94         if (type == OBJ_BAD) {
  95                 cgit_print_error_page(404, "Not found",
  96                         "Bad object name: %s", sha1_to_hex(sha1));
  97                 return;
  98         }
  99
 100         buf = read_sha1_file(sha1, &type, &size);
 101         if (!buf) {
 102                 cgit_print_error_page(500, "Internal server error",
 103                         "Error reading object %s", sha1_to_hex(sha1));
 104                 return;
 105         }
 106
 107         cgit_print_layout_start();
 108         htmlf("blob: %s (", sha1_to_hex(sha1));
 109         cgit_plain_link("plain", NULL, NULL, ctx.qry.head,
 110                         rev, path);
 111         html(")\n");
 112
 113         if (ctx.cfg.max_blob_size && size / 1024 > ctx.cfg.max_blob_size) {
 114                 htmlf("<div class='error'>blob size (%ldKB) exceeds display size limit (%dKB).</div>",
 115                                 size / 1024, ctx.cfg.max_blob_size);
 116                 return;
 117         }
 118
 119         if (buffer_is_binary(buf, size))
 120                 print_binary_buffer(buf, size);
 121         else
 122                 print_text_buffer(basename, buf, size);
 123 }
 124
 125
 126 static int ls_item(const unsigned char *sha1, struct strbuf *base,
 127                 const char *pathname, unsigned mode, int stage, void *cbdata)
 128 {
 129         struct walk_tree_context *walk_tree_ctx = cbdata;
 130         char *name;
 131         struct strbuf fullpath = STRBUF_INIT;
 132         struct strbuf class = STRBUF_INIT;
 133         enum object_type type;
 134         unsigned long size = 0;
 135
 136         name = xstrdup(pathname);
 137         strbuf_addf(&fullpath, "%s%s%s", ctx.qry.path ? ctx.qry.path : "",
 138                     ctx.qry.path ? "/" : "", name);
 139
 140         if (!S_ISGITLINK(mode)) {
 141                 type = sha1_object_info(sha1, &size);
 142                 if (type == OBJ_BAD) {
 143                         htmlf("<tr><td colspan='3'>Bad object: %s %s</td></tr>",
 144                               name,
 145                               sha1_to_hex(sha1));
 146                         free(name);
 147                         return 0;
 148                 }
 149         }
 150
 151         html("<tr><td class='ls-mode'>");
 152         cgit_print_filemode(mode);
 153         html("</td><td>");
 154         if (S_ISGITLINK(mode)) {
 155                 cgit_submodule_link("ls-mod", fullpath.buf, sha1_to_hex(sha1));
 156         } else if (S_ISDIR(mode)) {
 157                 cgit_tree_link(name, NULL, "ls-dir", ctx.qry.head,
 158                                walk_tree_ctx->curr_rev, fullpath.buf);
 159         } else {
 160                 char *ext = strrchr(name, '.');
 161                 strbuf_addstr(&class, "ls-blob");
 162                 if (ext)
 163                         strbuf_addf(&class, " %s", ext + 1);
 164                 cgit_tree_link(name, NULL, class.buf, ctx.qry.head,
 165                                walk_tree_ctx->curr_rev, fullpath.buf);
 166         }
 167         htmlf("</td><td class='ls-size'>%li</td>", size);
 168
 169         html("<td>");
 170         cgit_log_link("log", NULL, "button", ctx.qry.head,
 171                       walk_tree_ctx->curr_rev, fullpath.buf, 0, NULL, NULL,
 172                       ctx.qry.showmsg, 0);
 173         if (ctx.repo->max_stats)
 174                 cgit_stats_link("stats", NULL, "button", ctx.qry.head,
 175                                 fullpath.buf);
 176         if (!S_ISGITLINK(mode))
 177                 cgit_plain_link("plain", NULL, "button", ctx.qry.head,
 178                                 walk_tree_ctx->curr_rev, fullpath.buf);
 179         html("</td></tr>\n");
 180         free(name);
 181         strbuf_release(&fullpath);
 182         strbuf_release(&class);
 183         return 0;
 184 }
 185
 186 static void ls_head(void)
 187 {
 188         cgit_print_layout_start();
 189         html("<table summary='tree listing' class='list'>\n");
 190         html("<tr class='nohover'>");
 191         html("<th class='left'>Mode</th>");
 192         html("<th class='left'>Name</th>");
 193         html("<th class='right'>Size</th>");
 194         html("<th/>");
 195         html("</tr>\n");
 196 }
 197
 198 static void ls_tail(void)
 199 {
 200         html("</table>\n");
 201         cgit_print_layout_end();
 202 }
 203
 204 static void ls_tree(const unsigned char *sha1, char *path, struct walk_tree_context *walk_tree_ctx)
 205 {
 206         struct tree *tree;
 207         struct pathspec paths = {
 208                 .nr = 0
 209         };
 210
 211         tree = parse_tree_indirect(sha1);
 212         if (!tree) {
 213                 cgit_print_error_page(404, "Not found",
 214                         "Not a tree object: %s", sha1_to_hex(sha1));
 215                 return;
 216         }
 217
 218         ls_head();
 219         read_tree_recursive(tree, "", 0, 1, &paths, ls_item, walk_tree_ctx);
 220         ls_tail();
 221 }
 222
 223
 224 static int walk_tree(const unsigned char *sha1, struct strbuf *base,
 225                 const char *pathname, unsigned mode, int stage, void *cbdata)
 226 {
 227         struct walk_tree_context *walk_tree_ctx = cbdata;
 228         static char buffer[PATH_MAX];
 229
 230         if (walk_tree_ctx->state == 0) {
 231                 memcpy(buffer, base->buf, base->len);
 232                 strcpy(buffer + base->len, pathname);
 233                 if (strcmp(walk_tree_ctx->match_path, buffer))
 234                         return READ_TREE_RECURSIVE;
 235
 236                 if (S_ISDIR(mode)) {
 237                         walk_tree_ctx->state = 1;
 238                         ls_head();
 239                         return READ_TREE_RECURSIVE;
 240                 } else {
 241                         walk_tree_ctx->state = 2;
 242                         print_object(sha1, buffer, pathname, walk_tree_ctx->curr_rev);
 243                         return 0;
 244                 }
 245         }
 246         ls_item(sha1, base, pathname, mode, stage, walk_tree_ctx);
 247         return 0;
 248 }
 249
 250 /*
 251  * Show a tree or a blob
 252  *   rev:  the commit pointing at the root tree object
 253  *   path: path to tree or blob
 254  */
 255 void cgit_print_tree(const char *rev, char *path)
 256 {
 257         unsigned char sha1[20];
 258         struct commit *commit;
 259         struct pathspec_item path_items = {
 260                 .match = path,
 261                 .len = path ? strlen(path) : 0
 262         };
 263         struct pathspec paths = {
 264                 .nr = path ? 1 : 0,
 265                 .items = &path_items
 266         };
 267         struct walk_tree_context walk_tree_ctx = {
 268                 .match_path = path,
 269                 .state = 0
 270         };
 271
 272         if (!rev)
 273                 rev = ctx.qry.head;
 274
 275         if (get_sha1(rev, sha1)) {
 276                 cgit_print_error_page(404, "Not found",
 277                         "Invalid revision name: %s", rev);
 278                 return;
 279         }
 280         commit = lookup_commit_reference(sha1);
 281         if (!commit || parse_commit(commit)) {
 282                 cgit_print_error_page(404, "Not found",
 283                         "Invalid commit reference: %s", rev);
 284                 return;
 285         }
 286
 287         walk_tree_ctx.curr_rev = xstrdup(rev);
 288
 289         if (path == NULL) {
 290                 ls_tree(commit->tree->object.sha1, NULL, &walk_tree_ctx);
 291                 goto cleanup;
 292         }
 293
 294         read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 295         if (walk_tree_ctx.state == 1)
 296                 ls_tail();
 297         else if (walk_tree_ctx.state == 2)
 298                 cgit_print_layout_end();
 299         else
 300                 cgit_print_error_page(404, "Not found", "Path not found");
 301
 302 cleanup:
 303         free(walk_tree_ctx.curr_rev);
 304 }