ui-tree.c

   1 /* ui-tree.c: functions for tree output
   2  *
   3  * Copyright (C) 2006-2017 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 struct object_id *oid, const char *path, const char *basename, const char *rev)
  88 {
  89         enum object_type type;
  90         char *buf;
  91         unsigned long size;
  92         bool is_binary;
  93
  94         type = oid_object_info(the_repository, oid, &size);
  95         if (type == OBJ_BAD) {
  96                 cgit_print_error_page(404, "Not found",
  97                         "Bad object name: %s", oid_to_hex(oid));
  98                 return;
  99         }
 100
 101         buf = read_object_file(oid, &type, &size);
 102         if (!buf) {
 103                 cgit_print_error_page(500, "Internal server error",
 104                         "Error reading object %s", oid_to_hex(oid));
 105                 return;
 106         }
 107         is_binary = buffer_is_binary(buf, size);
 108
 109         cgit_set_title_from_path(path);
 110
 111         cgit_print_layout_start();
 112         htmlf("blob: %s (", oid_to_hex(oid));
 113         cgit_plain_link("plain", NULL, NULL, ctx.qry.head,
 114                         rev, path);
 115         if (ctx.repo->enable_blame && !is_binary) {
 116                 html(") (");
 117                 cgit_blame_link("blame", NULL, NULL, ctx.qry.head,
 118                                 rev, path);
 119         }
 120         html(")\n");
 121
 122         if (ctx.cfg.max_blob_size && size / 1024 > ctx.cfg.max_blob_size) {
 123                 htmlf("<div class='error'>blob size (%ldKB) exceeds display size limit (%dKB).</div>",
 124                                 size / 1024, ctx.cfg.max_blob_size);
 125                 return;
 126         }
 127
 128         if (is_binary)
 129                 print_binary_buffer(buf, size);
 130         else
 131                 print_text_buffer(basename, buf, size);
 132
 133         free(buf);
 134 }
 135
 136 struct single_tree_ctx {
 137         struct strbuf *path;
 138         struct object_id oid;
 139         char *name;
 140         size_t count;
 141 };
 142
 143 static int single_tree_cb(const struct object_id *oid, struct strbuf *base,
 144                           const char *pathname, unsigned mode, void *cbdata)
 145 {
 146         struct single_tree_ctx *ctx = cbdata;
 147
 148         if (++ctx->count > 1)
 149                 return -1;
 150
 151         if (!S_ISDIR(mode)) {
 152                 ctx->count = 2;
 153                 return -1;
 154         }
 155
 156         ctx->name = xstrdup(pathname);
 157         oidcpy(&ctx->oid, oid);
 158         strbuf_addf(ctx->path, "/%s", pathname);
 159         return 0;
 160 }
 161
 162 static void write_tree_link(const struct object_id *oid, char *name,
 163                             char *rev, struct strbuf *fullpath)
 164 {
 165         size_t initial_length = fullpath->len;
 166         struct tree *tree;
 167         struct single_tree_ctx tree_ctx = {
 168                 .path = fullpath,
 169                 .count = 1,
 170         };
 171         struct pathspec paths = {
 172                 .nr = 0
 173         };
 174
 175         oidcpy(&tree_ctx.oid, oid);
 176
 177         while (tree_ctx.count == 1) {
 178                 cgit_tree_link(name, NULL, "ls-dir", ctx.qry.head, rev,
 179                                fullpath->buf);
 180
 181                 tree = lookup_tree(the_repository, &tree_ctx.oid);
 182                 if (!tree)
 183                         return;
 184
 185                 free(tree_ctx.name);
 186                 tree_ctx.name = NULL;
 187                 tree_ctx.count = 0;
 188
 189                 read_tree(the_repository, tree, &paths, single_tree_cb, &tree_ctx);
 190
 191                 if (tree_ctx.count != 1)
 192                         break;
 193
 194                 html(" / ");
 195                 name = tree_ctx.name;
 196         }
 197
 198         strbuf_setlen(fullpath, initial_length);
 199 }
 200
 201 static int ls_item(const struct object_id *oid, struct strbuf *base,
 202                 const char *pathname, unsigned mode, void *cbdata)
 203 {
 204         struct walk_tree_context *walk_tree_ctx = cbdata;
 205         char *name;
 206         struct strbuf fullpath = STRBUF_INIT;
 207         struct strbuf linkpath = STRBUF_INIT;
 208         struct strbuf class = STRBUF_INIT;
 209         enum object_type type;
 210         unsigned long size = 0;
 211         char *buf;
 212
 213         name = xstrdup(pathname);
 214         strbuf_addf(&fullpath, "%s%s%s", ctx.qry.path ? ctx.qry.path : "",
 215                     ctx.qry.path ? "/" : "", name);
 216
 217         if (!S_ISGITLINK(mode)) {
 218                 type = oid_object_info(the_repository, oid, &size);
 219                 if (type == OBJ_BAD) {
 220                         htmlf("<tr><td colspan='3'>Bad object: %s %s</td></tr>",
 221                               name,
 222                               oid_to_hex(oid));
 223                         goto cleanup;
 224                 }
 225         }
 226
 227         html("<tr><td class='ls-mode'>");
 228         cgit_print_filemode(mode);
 229         html("</td><td>");
 230         if (S_ISGITLINK(mode)) {
 231                 cgit_submodule_link("ls-mod", fullpath.buf, oid_to_hex(oid));
 232         } else if (S_ISDIR(mode)) {
 233                 write_tree_link(oid, name, walk_tree_ctx->curr_rev,
 234                                 &fullpath);
 235         } else {
 236                 char *ext = strrchr(name, '.');
 237                 strbuf_addstr(&class, "ls-blob");
 238                 if (ext)
 239                         strbuf_addf(&class, " %s", ext + 1);
 240                 cgit_tree_link(name, NULL, class.buf, ctx.qry.head,
 241                                walk_tree_ctx->curr_rev, fullpath.buf);
 242         }
 243         if (S_ISLNK(mode)) {
 244                 html(" -> ");
 245                 buf = read_object_file(oid, &type, &size);
 246                 if (!buf) {
 247                         htmlf("Error reading object: %s", oid_to_hex(oid));
 248                         goto cleanup;
 249                 }
 250                 strbuf_addbuf(&linkpath, &fullpath);
 251                 strbuf_addf(&linkpath, "/../%s", buf);
 252                 strbuf_normalize_path(&linkpath);
 253                 cgit_tree_link(buf, NULL, class.buf, ctx.qry.head,
 254                         walk_tree_ctx->curr_rev, linkpath.buf);
 255                 free(buf);
 256                 strbuf_release(&linkpath);
 257         }
 258         htmlf("</td><td class='ls-size'>%li</td>", size);
 259
 260         html("<td>");
 261         cgit_log_link("log", NULL, "button", ctx.qry.head,
 262                       walk_tree_ctx->curr_rev, fullpath.buf, 0, NULL, NULL,
 263                       ctx.qry.showmsg, 0);
 264         if (ctx.repo->max_stats)
 265                 cgit_stats_link("stats", NULL, "button", ctx.qry.head,
 266                                 fullpath.buf);
 267         if (!S_ISGITLINK(mode))
 268                 cgit_plain_link("plain", NULL, "button", ctx.qry.head,
 269                                 walk_tree_ctx->curr_rev, fullpath.buf);
 270         if (!S_ISDIR(mode) && ctx.repo->enable_blame)
 271                 cgit_blame_link("blame", NULL, "button", ctx.qry.head,
 272                                 walk_tree_ctx->curr_rev, fullpath.buf);
 273         html("</td></tr>\n");
 274
 275 cleanup:
 276         free(name);
 277         strbuf_release(&fullpath);
 278         strbuf_release(&class);
 279         return 0;
 280 }
 281
 282 static void ls_head(void)
 283 {
 284         cgit_print_layout_start();
 285         html("<table summary='tree listing' class='list'>\n");
 286         html("<tr class='nohover'>");
 287         html("<th class='left'>Mode</th>");
 288         html("<th class='left'>Name</th>");
 289         html("<th class='right'>Size</th>");
 290         html("<th/>");
 291         html("</tr>\n");
 292 }
 293
 294 static void ls_tail(void)
 295 {
 296         html("</table>\n");
 297         cgit_print_layout_end();
 298 }
 299
 300 static void ls_tree(const struct object_id *oid, const char *path, struct walk_tree_context *walk_tree_ctx)
 301 {
 302         struct tree *tree;
 303         struct pathspec paths = {
 304                 .nr = 0
 305         };
 306
 307         tree = parse_tree_indirect(oid);
 308         if (!tree) {
 309                 cgit_print_error_page(404, "Not found",
 310                         "Not a tree object: %s", oid_to_hex(oid));
 311                 return;
 312         }
 313
 314         ls_head();
 315         read_tree(the_repository, tree, &paths, ls_item, walk_tree_ctx);
 316         ls_tail();
 317 }
 318
 319
 320 static int walk_tree(const struct object_id *oid, struct strbuf *base,
 321                 const char *pathname, unsigned mode, void *cbdata)
 322 {
 323         struct walk_tree_context *walk_tree_ctx = cbdata;
 324
 325         if (walk_tree_ctx->state == 0) {
 326                 struct strbuf buffer = STRBUF_INIT;
 327
 328                 strbuf_addbuf(&buffer, base);
 329                 strbuf_addstr(&buffer, pathname);
 330                 if (strcmp(walk_tree_ctx->match_path, buffer.buf))
 331                         return READ_TREE_RECURSIVE;
 332
 333                 if (S_ISDIR(mode)) {
 334                         walk_tree_ctx->state = 1;
 335                         cgit_set_title_from_path(buffer.buf);
 336                         strbuf_release(&buffer);
 337                         ls_head();
 338                         return READ_TREE_RECURSIVE;
 339                 } else {
 340                         walk_tree_ctx->state = 2;
 341                         print_object(oid, buffer.buf, pathname, walk_tree_ctx->curr_rev);
 342                         strbuf_release(&buffer);
 343                         return 0;
 344                 }
 345         }
 346         ls_item(oid, base, pathname, mode, walk_tree_ctx);
 347         return 0;
 348 }
 349
 350 /*
 351  * Show a tree or a blob
 352  *   rev:  the commit pointing at the root tree object
 353  *   path: path to tree or blob
 354  */
 355 void cgit_print_tree(const char *rev, char *path)
 356 {
 357         struct object_id oid;
 358         struct commit *commit;
 359         struct pathspec_item path_items = {
 360                 .match = path,
 361                 .len = path ? strlen(path) : 0
 362         };
 363         struct pathspec paths = {
 364                 .nr = path ? 1 : 0,
 365                 .items = &path_items
 366         };
 367         struct walk_tree_context walk_tree_ctx = {
 368                 .match_path = path,
 369                 .state = 0
 370         };
 371
 372         if (!rev)
 373                 rev = ctx.qry.head;
 374
 375         if (get_oid(rev, &oid)) {
 376                 cgit_print_error_page(404, "Not found",
 377                         "Invalid revision name: %s", rev);
 378                 return;
 379         }
 380         commit = lookup_commit_reference(the_repository, &oid);
 381         if (!commit || parse_commit(commit)) {
 382                 cgit_print_error_page(404, "Not found",
 383                         "Invalid commit reference: %s", rev);
 384                 return;
 385         }
 386
 387         walk_tree_ctx.curr_rev = xstrdup(rev);
 388
 389         if (path == NULL) {
 390                 ls_tree(get_commit_tree_oid(commit), NULL, &walk_tree_ctx);
 391                 goto cleanup;
 392         }
 393
 394         read_tree(the_repository, repo_get_commit_tree(the_repository, commit),
 395                   &paths, walk_tree, &walk_tree_ctx);
 396         if (walk_tree_ctx.state == 1)
 397                 ls_tail();
 398         else if (walk_tree_ctx.state == 2)
 399                 cgit_print_layout_end();
 400         else
 401                 cgit_print_error_page(404, "Not found", "Path not found");
 402
 403 cleanup:
 404         free(walk_tree_ctx.curr_rev);
 405 }