ui-shared.c

   1 /* ui-shared.c: common web output functions
   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-shared.h"
  11 #include "cmd.h"
  12 #include "html.h"
  13 #include "version.h"
  14
  15 static const char cgit_doctype[] =
  16 "<!DOCTYPE html>\n";
  17
  18 static char *http_date(time_t t)
  19 {
  20         static char day[][4] =
  21                 {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
  22         static char month[][4] =
  23                 {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
  24                  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
  25         struct tm *tm = gmtime(&t);
  26         return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
  27                    tm->tm_mday, month[tm->tm_mon], 1900 + tm->tm_year,
  28                    tm->tm_hour, tm->tm_min, tm->tm_sec);
  29 }
  30
  31 void cgit_print_error(const char *fmt, ...)
  32 {
  33         va_list ap;
  34         va_start(ap, fmt);
  35         cgit_vprint_error(fmt, ap);
  36         va_end(ap);
  37 }
  38
  39 void cgit_vprint_error(const char *fmt, va_list ap)
  40 {
  41         va_list cp;
  42         html("<div class='error'>");
  43         va_copy(cp, ap);
  44         html_vtxtf(fmt, cp);
  45         va_end(cp);
  46         html("</div>\n");
  47 }
  48
  49 const char *cgit_httpscheme(void)
  50 {
  51         if (ctx.env.https && !strcmp(ctx.env.https, "on"))
  52                 return "https://";
  53         else
  54                 return "http://";
  55 }
  56
  57 char *cgit_hosturl(void)
  58 {
  59         if (ctx.env.http_host)
  60                 return xstrdup(ctx.env.http_host);
  61         if (!ctx.env.server_name)
  62                 return NULL;
  63         if (!ctx.env.server_port || atoi(ctx.env.server_port) == 80)
  64                 return xstrdup(ctx.env.server_name);
  65         return fmtalloc("%s:%s", ctx.env.server_name, ctx.env.server_port);
  66 }
  67
  68 char *cgit_currenturl(void)
  69 {
  70         const char *root = cgit_rooturl();
  71
  72         if (!ctx.qry.url)
  73                 return xstrdup(root);
  74         if (root[0] && root[strlen(root) - 1] == '/')
  75                 return fmtalloc("%s%s", root, ctx.qry.url);
  76         return fmtalloc("%s/%s", root, ctx.qry.url);
  77 }
  78
  79 char *cgit_currentfullurl(void)
  80 {
  81         const char *root = cgit_rooturl();
  82         const char *orig_query = ctx.env.query_string ? ctx.env.query_string : "";
  83         size_t len = strlen(orig_query);
  84         char *query = xmalloc(len + 2), *start_url, *ret;
  85
  86         /* Remove all url=... parts from query string */
  87         memcpy(query + 1, orig_query, len + 1);
  88         query[0] = '?';
  89         start_url = query;
  90         while ((start_url = strstr(start_url, "url=")) != NULL) {
  91                 if (start_url[-1] == '?' || start_url[-1] == '&') {
  92                         const char *end_url = strchr(start_url, '&');
  93                         if (end_url)
  94                                 memmove(start_url, end_url + 1, strlen(end_url));
  95                         else
  96                                 start_url[0] = '\0';
  97                 } else
  98                         ++start_url;
  99         }
 100         if (!query[1])
 101                 query[0] = '\0';
 102
 103         if (!ctx.qry.url)
 104                 ret = fmtalloc("%s%s", root, query);
 105         else if (root[0] && root[strlen(root) - 1] == '/')
 106                 ret = fmtalloc("%s%s%s", root, ctx.qry.url, query);
 107         else
 108                 ret = fmtalloc("%s/%s%s", root, ctx.qry.url, query);
 109         free(query);
 110         return ret;
 111 }
 112
 113 const char *cgit_rooturl(void)
 114 {
 115         if (ctx.cfg.virtual_root)
 116                 return ctx.cfg.virtual_root;
 117         else
 118                 return ctx.cfg.script_name;
 119 }
 120
 121 const char *cgit_loginurl(void)
 122 {
 123         static const char *login_url;
 124         if (!login_url)
 125                 login_url = fmtalloc("%s?p=login", cgit_rooturl());
 126         return login_url;
 127 }
 128
 129 char *cgit_repourl(const char *reponame)
 130 {
 131         if (ctx.cfg.virtual_root)
 132                 return fmtalloc("%s%s/", ctx.cfg.virtual_root, reponame);
 133         else
 134                 return fmtalloc("?r=%s", reponame);
 135 }
 136
 137 char *cgit_fileurl(const char *reponame, const char *pagename,
 138                    const char *filename, const char *query)
 139 {
 140         struct strbuf sb = STRBUF_INIT;
 141         char *delim;
 142
 143         if (ctx.cfg.virtual_root) {
 144                 strbuf_addf(&sb, "%s%s/%s/%s", ctx.cfg.virtual_root, reponame,
 145                             pagename, (filename ? filename:""));
 146                 delim = "?";
 147         } else {
 148                 strbuf_addf(&sb, "?url=%s/%s/%s", reponame, pagename,
 149                             (filename ? filename : ""));
 150                 delim = "&amp;";
 151         }
 152         if (query)
 153                 strbuf_addf(&sb, "%s%s", delim, query);
 154         return strbuf_detach(&sb, NULL);
 155 }
 156
 157 char *cgit_pageurl(const char *reponame, const char *pagename,
 158                    const char *query)
 159 {
 160         return cgit_fileurl(reponame, pagename, NULL, query);
 161 }
 162
 163 const char *cgit_repobasename(const char *reponame)
 164 {
 165         /* I assume we don't need to store more than one repo basename */
 166         static char rvbuf[1024];
 167         int p;
 168         const char *rv;
 169         size_t len;
 170
 171         len = strlcpy(rvbuf, reponame, sizeof(rvbuf));
 172         if (len >= sizeof(rvbuf))
 173                 die("cgit_repobasename: truncated repository name '%s'", reponame);
 174         p = len - 1;
 175         /* strip trailing slashes */
 176         while (p && rvbuf[p] == '/')
 177                 rvbuf[p--] = '\0';
 178         /* strip trailing .git */
 179         if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
 180                 p -= 3;
 181                 rvbuf[p--] = '\0';
 182         }
 183         /* strip more trailing slashes if any */
 184         while (p && rvbuf[p] == '/')
 185                 rvbuf[p--] = '\0';
 186         /* find last slash in the remaining string */
 187         rv = strrchr(rvbuf, '/');
 188         if (rv)
 189                 return ++rv;
 190         return rvbuf;
 191 }
 192
 193 const char *cgit_snapshot_prefix(const struct cgit_repo *repo)
 194 {
 195         if (repo->snapshot_prefix)
 196                 return repo->snapshot_prefix;
 197
 198         return cgit_repobasename(repo->url);
 199 }
 200
 201 static void site_url(const char *page, const char *search, const char *sort, int ofs, int always_root)
 202 {
 203         char *delim = "?";
 204
 205         if (always_root || page)
 206                 html_attr(cgit_rooturl());
 207         else {
 208                 char *currenturl = cgit_currenturl();
 209                 html_attr(currenturl);
 210                 free(currenturl);
 211         }
 212
 213         if (page) {
 214                 htmlf("?p=%s", page);
 215                 delim = "&amp;";
 216         }
 217         if (search) {
 218                 html(delim);
 219                 html("q=");
 220                 html_attr(search);
 221                 delim = "&amp;";
 222         }
 223         if (sort) {
 224                 html(delim);
 225                 html("s=");
 226                 html_attr(sort);
 227                 delim = "&amp;";
 228         }
 229         if (ofs) {
 230                 html(delim);
 231                 htmlf("ofs=%d", ofs);
 232         }
 233 }
 234
 235 static void site_link(const char *page, const char *name, const char *title,
 236                       const char *class, const char *search, const char *sort, int ofs, int always_root)
 237 {
 238         html("<a");
 239         if (title) {
 240                 html(" title='");
 241                 html_attr(title);
 242                 html("'");
 243         }
 244         if (class) {
 245                 html(" class='");
 246                 html_attr(class);
 247                 html("'");
 248         }
 249         html(" href='");
 250         site_url(page, search, sort, ofs, always_root);
 251         html("'>");
 252         html_txt(name);
 253         html("</a>");
 254 }
 255
 256 void cgit_index_link(const char *name, const char *title, const char *class,
 257                      const char *pattern, const char *sort, int ofs, int always_root)
 258 {
 259         site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 260 }
 261
 262 static char *repolink(const char *title, const char *class, const char *page,
 263                       const char *head, const char *path)
 264 {
 265         char *delim = "?";
 266
 267         html("<a");
 268         if (title) {
 269                 html(" title='");
 270                 html_attr(title);
 271                 html("'");
 272         }
 273         if (class) {
 274                 html(" class='");
 275                 html_attr(class);
 276                 html("'");
 277         }
 278         html(" href='");
 279         if (ctx.cfg.virtual_root) {
 280                 html_url_path(ctx.cfg.virtual_root);
 281                 html_url_path(ctx.repo->url);
 282                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 283                         html("/");
 284                 if (page) {
 285                         html_url_path(page);
 286                         html("/");
 287                         if (path)
 288                                 html_url_path(path);
 289                 }
 290         } else {
 291                 html_url_path(ctx.cfg.script_name);
 292                 html("?url=");
 293                 html_url_arg(ctx.repo->url);
 294                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 295                         html("/");
 296                 if (page) {
 297                         html_url_arg(page);
 298                         html("/");
 299                         if (path)
 300                                 html_url_arg(path);
 301                 }
 302                 delim = "&amp;";
 303         }
 304         if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
 305                 html(delim);
 306                 html("h=");
 307                 html_url_arg(head);
 308                 delim = "&amp;";
 309         }
 310         return fmt("%s", delim);
 311 }
 312
 313 static void reporevlink(const char *page, const char *name, const char *title,
 314                         const char *class, const char *head, const char *rev,
 315                         const char *path)
 316 {
 317         char *delim;
 318
 319         delim = repolink(title, class, page, head, path);
 320         if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
 321                 html(delim);
 322                 html("id=");
 323                 html_url_arg(rev);
 324         }
 325         html("'>");
 326         html_txt(name);
 327         html("</a>");
 328 }
 329
 330 void cgit_summary_link(const char *name, const char *title, const char *class,
 331                        const char *head)
 332 {
 333         reporevlink(NULL, name, title, class, head, NULL, NULL);
 334 }
 335
 336 void cgit_tag_link(const char *name, const char *title, const char *class,
 337                    const char *tag)
 338 {
 339         reporevlink("tag", name, title, class, tag, NULL, NULL);
 340 }
 341
 342 void cgit_tree_link(const char *name, const char *title, const char *class,
 343                     const char *head, const char *rev, const char *path)
 344 {
 345         reporevlink("tree", name, title, class, head, rev, path);
 346 }
 347
 348 void cgit_plain_link(const char *name, const char *title, const char *class,
 349                      const char *head, const char *rev, const char *path)
 350 {
 351         reporevlink("plain", name, title, class, head, rev, path);
 352 }
 353
 354 void cgit_blame_link(const char *name, const char *title, const char *class,
 355                      const char *head, const char *rev, const char *path)
 356 {
 357         reporevlink("blame", name, title, class, head, rev, path);
 358 }
 359
 360 void cgit_log_link(const char *name, const char *title, const char *class,
 361                    const char *head, const char *rev, const char *path,
 362                    int ofs, const char *grep, const char *pattern, int showmsg,
 363                    int follow)
 364 {
 365         char *delim;
 366
 367         delim = repolink(title, class, "log", head, path);
 368         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 369                 html(delim);
 370                 html("id=");
 371                 html_url_arg(rev);
 372                 delim = "&amp;";
 373         }
 374         if (grep && pattern) {
 375                 html(delim);
 376                 html("qt=");
 377                 html_url_arg(grep);
 378                 delim = "&amp;";
 379                 html(delim);
 380                 html("q=");
 381                 html_url_arg(pattern);
 382         }
 383         if (ofs > 0) {
 384                 html(delim);
 385                 html("ofs=");
 386                 htmlf("%d", ofs);
 387                 delim = "&amp;";
 388         }
 389         if (showmsg) {
 390                 html(delim);
 391                 html("showmsg=1");
 392                 delim = "&amp;";
 393         }
 394         if (follow) {
 395                 html(delim);
 396                 html("follow=1");
 397         }
 398         html("'>");
 399         html_txt(name);
 400         html("</a>");
 401 }
 402
 403 void cgit_commit_link(const char *name, const char *title, const char *class,
 404                       const char *head, const char *rev, const char *path)
 405 {
 406         char *delim;
 407
 408         delim = repolink(title, class, "commit", head, path);
 409         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 410                 html(delim);
 411                 html("id=");
 412                 html_url_arg(rev);
 413                 delim = "&amp;";
 414         }
 415         if (ctx.qry.difftype) {
 416                 html(delim);
 417                 htmlf("dt=%d", ctx.qry.difftype);
 418                 delim = "&amp;";
 419         }
 420         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 421                 html(delim);
 422                 html("context=");
 423                 htmlf("%d", ctx.qry.context);
 424                 delim = "&amp;";
 425         }
 426         if (ctx.qry.ignorews) {
 427                 html(delim);
 428                 html("ignorews=1");
 429                 delim = "&amp;";
 430         }
 431         if (ctx.qry.follow) {
 432                 html(delim);
 433                 html("follow=1");
 434         }
 435         html("'>");
 436         if (name[0] != '\0') {
 437                 if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
 438                         html_ntxt(name, ctx.cfg.max_msg_len - 3);
 439                         html("...");
 440                 } else
 441                         html_txt(name);
 442         } else
 443                 html_txt("(no commit message)");
 444         html("</a>");
 445 }
 446
 447 void cgit_refs_link(const char *name, const char *title, const char *class,
 448                     const char *head, const char *rev, const char *path)
 449 {
 450         reporevlink("refs", name, title, class, head, rev, path);
 451 }
 452
 453 void cgit_snapshot_link(const char *name, const char *title, const char *class,
 454                         const char *head, const char *rev,
 455                         const char *archivename)
 456 {
 457         reporevlink("snapshot", name, title, class, head, rev, archivename);
 458 }
 459
 460 void cgit_diff_link(const char *name, const char *title, const char *class,
 461                     const char *head, const char *new_rev, const char *old_rev,
 462                     const char *path)
 463 {
 464         char *delim;
 465
 466         delim = repolink(title, class, "diff", head, path);
 467         if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
 468                 html(delim);
 469                 html("id=");
 470                 html_url_arg(new_rev);
 471                 delim = "&amp;";
 472         }
 473         if (old_rev) {
 474                 html(delim);
 475                 html("id2=");
 476                 html_url_arg(old_rev);
 477                 delim = "&amp;";
 478         }
 479         if (ctx.qry.difftype) {
 480                 html(delim);
 481                 htmlf("dt=%d", ctx.qry.difftype);
 482                 delim = "&amp;";
 483         }
 484         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 485                 html(delim);
 486                 html("context=");
 487                 htmlf("%d", ctx.qry.context);
 488                 delim = "&amp;";
 489         }
 490         if (ctx.qry.ignorews) {
 491                 html(delim);
 492                 html("ignorews=1");
 493                 delim = "&amp;";
 494         }
 495         if (ctx.qry.follow) {
 496                 html(delim);
 497                 html("follow=1");
 498         }
 499         html("'>");
 500         html_txt(name);
 501         html("</a>");
 502 }
 503
 504 void cgit_patch_link(const char *name, const char *title, const char *class,
 505                      const char *head, const char *rev, const char *path)
 506 {
 507         reporevlink("patch", name, title, class, head, rev, path);
 508 }
 509
 510 void cgit_stats_link(const char *name, const char *title, const char *class,
 511                      const char *head, const char *path)
 512 {
 513         reporevlink("stats", name, title, class, head, NULL, path);
 514 }
 515
 516 static void cgit_self_link(char *name, const char *title, const char *class)
 517 {
 518         if (!strcmp(ctx.qry.page, "repolist"))
 519                 cgit_index_link(name, title, class, ctx.qry.search, ctx.qry.sort,
 520                                 ctx.qry.ofs, 1);
 521         else if (!strcmp(ctx.qry.page, "summary"))
 522                 cgit_summary_link(name, title, class, ctx.qry.head);
 523         else if (!strcmp(ctx.qry.page, "tag"))
 524                 cgit_tag_link(name, title, class, ctx.qry.has_oid ?
 525                                ctx.qry.oid : ctx.qry.head);
 526         else if (!strcmp(ctx.qry.page, "tree"))
 527                 cgit_tree_link(name, title, class, ctx.qry.head,
 528                                ctx.qry.has_oid ? ctx.qry.oid : NULL,
 529                                ctx.qry.path);
 530         else if (!strcmp(ctx.qry.page, "plain"))
 531                 cgit_plain_link(name, title, class, ctx.qry.head,
 532                                 ctx.qry.has_oid ? ctx.qry.oid : NULL,
 533                                 ctx.qry.path);
 534         else if (!strcmp(ctx.qry.page, "blame"))
 535                 cgit_blame_link(name, title, class, ctx.qry.head,
 536                                 ctx.qry.has_oid ? ctx.qry.oid : NULL,
 537                                 ctx.qry.path);
 538         else if (!strcmp(ctx.qry.page, "log"))
 539                 cgit_log_link(name, title, class, ctx.qry.head,
 540                               ctx.qry.has_oid ? ctx.qry.oid : NULL,
 541                               ctx.qry.path, ctx.qry.ofs,
 542                               ctx.qry.grep, ctx.qry.search,
 543                               ctx.qry.showmsg, ctx.qry.follow);
 544         else if (!strcmp(ctx.qry.page, "commit"))
 545                 cgit_commit_link(name, title, class, ctx.qry.head,
 546                                  ctx.qry.has_oid ? ctx.qry.oid : NULL,
 547                                  ctx.qry.path);
 548         else if (!strcmp(ctx.qry.page, "patch"))
 549                 cgit_patch_link(name, title, class, ctx.qry.head,
 550                                 ctx.qry.has_oid ? ctx.qry.oid : NULL,
 551                                 ctx.qry.path);
 552         else if (!strcmp(ctx.qry.page, "refs"))
 553                 cgit_refs_link(name, title, class, ctx.qry.head,
 554                                ctx.qry.has_oid ? ctx.qry.oid : NULL,
 555                                ctx.qry.path);
 556         else if (!strcmp(ctx.qry.page, "snapshot"))
 557                 cgit_snapshot_link(name, title, class, ctx.qry.head,
 558                                    ctx.qry.has_oid ? ctx.qry.oid : NULL,
 559                                    ctx.qry.path);
 560         else if (!strcmp(ctx.qry.page, "diff"))
 561                 cgit_diff_link(name, title, class, ctx.qry.head,
 562                                ctx.qry.oid, ctx.qry.oid2,
 563                                ctx.qry.path);
 564         else if (!strcmp(ctx.qry.page, "stats"))
 565                 cgit_stats_link(name, title, class, ctx.qry.head,
 566                                 ctx.qry.path);
 567         else {
 568                 /* Don't known how to make link for this page */
 569                 repolink(title, class, ctx.qry.page, ctx.qry.head, ctx.qry.path);
 570                 html("><!-- cgit_self_link() doesn't know how to make link for page '");
 571                 html_txt(ctx.qry.page);
 572                 html("' -->");
 573                 html_txt(name);
 574                 html("</a>");
 575         }
 576 }
 577
 578 void cgit_object_link(struct object *obj)
 579 {
 580         char *page, *shortrev, *fullrev, *name;
 581
 582         fullrev = oid_to_hex(&obj->oid);
 583         shortrev = xstrdup(fullrev);
 584         shortrev[10] = '\0';
 585         if (obj->type == OBJ_COMMIT) {
 586                 cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
 587                                  ctx.qry.head, fullrev, NULL);
 588                 return;
 589         } else if (obj->type == OBJ_TREE)
 590                 page = "tree";
 591         else if (obj->type == OBJ_TAG)
 592                 page = "tag";
 593         else
 594                 page = "blob";
 595         name = fmt("%s %s...", type_name(obj->type), shortrev);
 596         reporevlink(page, name, NULL, NULL, ctx.qry.head, fullrev, NULL);
 597 }
 598
 599 static struct string_list_item *lookup_path(struct string_list *list,
 600                                             const char *path)
 601 {
 602         struct string_list_item *item;
 603
 604         while (path && path[0]) {
 605                 if ((item = string_list_lookup(list, path)))
 606                         return item;
 607                 if (!(path = strchr(path, '/')))
 608                         break;
 609                 path++;
 610         }
 611         return NULL;
 612 }
 613
 614 void cgit_submodule_link(const char *class, char *path, const char *rev)
 615 {
 616         struct string_list *list;
 617         struct string_list_item *item;
 618         char tail, *dir;
 619         size_t len;
 620
 621         len = 0;
 622         tail = 0;
 623         list = &ctx.repo->submodules;
 624         item = lookup_path(list, path);
 625         if (!item) {
 626                 len = strlen(path);
 627                 tail = path[len - 1];
 628                 if (tail == '/') {
 629                         path[len - 1] = 0;
 630                         item = lookup_path(list, path);
 631                 }
 632         }
 633         if (item || ctx.repo->module_link) {
 634                 html("<a ");
 635                 if (class)
 636                         htmlf("class='%s' ", class);
 637                 html("href='");
 638                 if (item) {
 639                         html_attrf(item->util, rev);
 640                 } else {
 641                         dir = strrchr(path, '/');
 642                         if (dir)
 643                                 dir++;
 644                         else
 645                                 dir = path;
 646                         html_attrf(ctx.repo->module_link, dir, rev);
 647                 }
 648                 html("'>");
 649                 html_txt(path);
 650                 html("</a>");
 651         } else {
 652                 html("<span");
 653                 if (class)
 654                         htmlf(" class='%s'", class);
 655                 html(">");
 656                 html_txt(path);
 657                 html("</span>");
 658         }
 659         html_txtf(" @ %.7s", rev);
 660         if (item && tail)
 661                 path[len - 1] = tail;
 662 }
 663
 664 const struct date_mode *cgit_date_mode(enum date_mode_type type)
 665 {
 666         static struct date_mode mode;
 667         mode.type = type;
 668         mode.local = ctx.cfg.local_time;
 669         return &mode;
 670 }
 671
 672 static void print_rel_date(time_t t, int tz, double value,
 673         const char *class, const char *suffix)
 674 {
 675         htmlf("<span class='%s' title='", class);
 676         html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 677         htmlf("'>%.0f %s</span>", value, suffix);
 678 }
 679
 680 void cgit_print_age(time_t t, int tz, time_t max_relative)
 681 {
 682         time_t now, secs;
 683
 684         if (!t)
 685                 return;
 686         time(&now);
 687         secs = now - t;
 688         if (secs < 0)
 689                 secs = 0;
 690
 691         if (secs > max_relative && max_relative >= 0) {
 692                 html("<span title='");
 693                 html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 694                 html("'>");
 695                 html_txt(show_date(t, tz, cgit_date_mode(DATE_SHORT)));
 696                 html("</span>");
 697                 return;
 698         }
 699
 700         if (secs < TM_HOUR * 2) {
 701                 print_rel_date(t, tz, secs * 1.0 / TM_MIN, "age-mins", "min.");
 702                 return;
 703         }
 704         if (secs < TM_DAY * 2) {
 705                 print_rel_date(t, tz, secs * 1.0 / TM_HOUR, "age-hours", "hours");
 706                 return;
 707         }
 708         if (secs < TM_WEEK * 2) {
 709                 print_rel_date(t, tz, secs * 1.0 / TM_DAY, "age-days", "days");
 710                 return;
 711         }
 712         if (secs < TM_MONTH * 2) {
 713                 print_rel_date(t, tz, secs * 1.0 / TM_WEEK, "age-weeks", "weeks");
 714                 return;
 715         }
 716         if (secs < TM_YEAR * 2) {
 717                 print_rel_date(t, tz, secs * 1.0 / TM_MONTH, "age-months", "months");
 718                 return;
 719         }
 720         print_rel_date(t, tz, secs * 1.0 / TM_YEAR, "age-years", "years");
 721 }
 722
 723 void cgit_print_http_headers(void)
 724 {
 725         if (ctx.env.no_http && !strcmp(ctx.env.no_http, "1"))
 726                 return;
 727
 728         if (ctx.page.status)
 729                 htmlf("Status: %d %s\n", ctx.page.status, ctx.page.statusmsg);
 730         if (ctx.page.mimetype && ctx.page.charset)
 731                 htmlf("Content-Type: %s; charset=%s\n", ctx.page.mimetype,
 732                       ctx.page.charset);
 733         else if (ctx.page.mimetype)
 734                 htmlf("Content-Type: %s\n", ctx.page.mimetype);
 735         if (ctx.page.size)
 736                 htmlf("Content-Length: %zd\n", ctx.page.size);
 737         if (ctx.page.filename) {
 738                 html("Content-Disposition: inline; filename=\"");
 739                 html_header_arg_in_quotes(ctx.page.filename);
 740                 html("\"\n");
 741         }
 742         if (!ctx.env.authenticated)
 743                 html("Cache-Control: no-cache, no-store\n");
 744         htmlf("Last-Modified: %s\n", http_date(ctx.page.modified));
 745         htmlf("Expires: %s\n", http_date(ctx.page.expires));
 746         if (ctx.page.etag)
 747                 htmlf("ETag: \"%s\"\n", ctx.page.etag);
 748         html("\n");
 749         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 750                 exit(0);
 751 }
 752
 753 void cgit_redirect(const char *url, bool permanent)
 754 {
 755         htmlf("Status: %d %s\n", permanent ? 301 : 302, permanent ? "Moved" : "Found");
 756         html("Location: ");
 757         html_url_path(url);
 758         html("\n\n");
 759 }
 760
 761 static void print_rel_vcs_link(const char *url)
 762 {
 763         html("<link rel='vcs-git' href='");
 764         html_attr(url);
 765         html("' title='");
 766         html_attr(ctx.repo->name);
 767         html(" Git repository'/>\n");
 768 }
 769
 770 void cgit_print_docstart(void)
 771 {
 772         char *host = cgit_hosturl();
 773
 774         if (ctx.cfg.embedded) {
 775                 if (ctx.cfg.header)
 776                         html_include(ctx.cfg.header);
 777                 return;
 778         }
 779
 780         html(cgit_doctype);
 781         html("<html lang='en'>\n");
 782         html("<head>\n");
 783         html("<title>");
 784         html_txt(ctx.page.title);
 785         html("</title>\n");
 786         htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
 787         if (ctx.cfg.robots && *ctx.cfg.robots)
 788                 htmlf("<meta name='robots' content='%s'/>\n", ctx.cfg.robots);
 789         html("<link rel='stylesheet' type='text/css' href='");
 790         html_attr(ctx.cfg.css);
 791         html("'/>\n");
 792         if (ctx.cfg.favicon) {
 793                 html("<link rel='shortcut icon' href='");
 794                 html_attr(ctx.cfg.favicon);
 795                 html("'/>\n");
 796         }
 797         if (host && ctx.repo && ctx.qry.head) {
 798                 char *fileurl;
 799                 struct strbuf sb = STRBUF_INIT;
 800                 strbuf_addf(&sb, "h=%s", ctx.qry.head);
 801
 802                 html("<link rel='alternate' title='Atom feed' href='");
 803                 html(cgit_httpscheme());
 804                 html_attr(host);
 805                 fileurl = cgit_fileurl(ctx.repo->url, "atom", ctx.qry.vpath,
 806                                        sb.buf);
 807                 html_attr(fileurl);
 808                 html("' type='application/atom+xml'/>\n");
 809                 strbuf_release(&sb);
 810                 free(fileurl);
 811         }
 812         if (ctx.repo)
 813                 cgit_add_clone_urls(print_rel_vcs_link);
 814         if (ctx.cfg.head_include)
 815                 html_include(ctx.cfg.head_include);
 816         if (ctx.repo && ctx.repo->extra_head_content)
 817                 html(ctx.repo->extra_head_content);
 818         html("</head>\n");
 819         html("<body>\n");
 820         if (ctx.cfg.header)
 821                 html_include(ctx.cfg.header);
 822         free(host);
 823 }
 824
 825 void cgit_print_docend(void)
 826 {
 827         html("</div> <!-- class=content -->\n");
 828         if (ctx.cfg.embedded) {
 829                 html("</div> <!-- id=cgit -->\n");
 830                 if (ctx.cfg.footer)
 831                         html_include(ctx.cfg.footer);
 832                 return;
 833         }
 834         if (ctx.cfg.footer)
 835                 html_include(ctx.cfg.footer);
 836         else {
 837                 htmlf("<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit %s</a> "
 838                         "(<a href='https://git-scm.com/'>git %s</a>) at ", cgit_version, git_version_string);
 839                 html_txt(show_date(time(NULL), 0, cgit_date_mode(DATE_ISO8601)));
 840                 html("</div>\n");
 841         }
 842         html("</div> <!-- id=cgit -->\n");
 843         html("</body>\n</html>\n");
 844 }
 845
 846 void cgit_print_error_page(int code, const char *msg, const char *fmt, ...)
 847 {
 848         va_list ap;
 849         ctx.page.expires = ctx.cfg.cache_dynamic_ttl;
 850         ctx.page.status = code;
 851         ctx.page.statusmsg = msg;
 852         cgit_print_layout_start();
 853         va_start(ap, fmt);
 854         cgit_vprint_error(fmt, ap);
 855         va_end(ap);
 856         cgit_print_layout_end();
 857 }
 858
 859 void cgit_print_layout_start(void)
 860 {
 861         cgit_print_http_headers();
 862         cgit_print_docstart();
 863         cgit_print_pageheader();
 864 }
 865
 866 void cgit_print_layout_end(void)
 867 {
 868         cgit_print_docend();
 869 }
 870
 871 static void add_clone_urls(void (*fn)(const char *), char *txt, char *suffix)
 872 {
 873         struct strbuf **url_list = strbuf_split_str(txt, ' ', 0);
 874         int i;
 875
 876         for (i = 0; url_list[i]; i++) {
 877                 strbuf_rtrim(url_list[i]);
 878                 if (url_list[i]->len == 0)
 879                         continue;
 880                 if (suffix && *suffix)
 881                         strbuf_addf(url_list[i], "/%s", suffix);
 882                 fn(url_list[i]->buf);
 883         }
 884
 885         strbuf_list_free(url_list);
 886 }
 887
 888 void cgit_add_clone_urls(void (*fn)(const char *))
 889 {
 890         if (ctx.repo->clone_url)
 891                 add_clone_urls(fn, expand_macros(ctx.repo->clone_url), NULL);
 892         else if (ctx.cfg.clone_prefix)
 893                 add_clone_urls(fn, ctx.cfg.clone_prefix, ctx.repo->url);
 894 }
 895
 896 static int print_branch_option(const char *refname, const struct object_id *oid,
 897                                int flags, void *cb_data)
 898 {
 899         char *name = (char *)refname;
 900         html_option(name, name, ctx.qry.head);
 901         return 0;
 902 }
 903
 904 void cgit_add_hidden_formfields(int incl_head, int incl_search,
 905                                 const char *page)
 906 {
 907         if (!ctx.cfg.virtual_root) {
 908                 struct strbuf url = STRBUF_INIT;
 909
 910                 strbuf_addf(&url, "%s/%s", ctx.qry.repo, page);
 911                 if (ctx.qry.vpath)
 912                         strbuf_addf(&url, "/%s", ctx.qry.vpath);
 913                 html_hidden("url", url.buf);
 914                 strbuf_release(&url);
 915         }
 916
 917         if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
 918             strcmp(ctx.qry.head, ctx.repo->defbranch))
 919                 html_hidden("h", ctx.qry.head);
 920
 921         if (ctx.qry.oid)
 922                 html_hidden("id", ctx.qry.oid);
 923         if (ctx.qry.oid2)
 924                 html_hidden("id2", ctx.qry.oid2);
 925         if (ctx.qry.showmsg)
 926                 html_hidden("showmsg", "1");
 927
 928         if (incl_search) {
 929                 if (ctx.qry.grep)
 930                         html_hidden("qt", ctx.qry.grep);
 931                 if (ctx.qry.search)
 932                         html_hidden("q", ctx.qry.search);
 933         }
 934 }
 935
 936 static const char *hc(const char *page)
 937 {
 938         if (!ctx.qry.page)
 939                 return NULL;
 940
 941         return strcmp(ctx.qry.page, page) ? NULL : "active";
 942 }
 943
 944 static void cgit_print_path_crumbs(char *path)
 945 {
 946         char *old_path = ctx.qry.path;
 947         char *p = path, *q, *end = path + strlen(path);
 948         int levels = 0;
 949
 950         ctx.qry.path = NULL;
 951         cgit_self_link("root", NULL, NULL);
 952         ctx.qry.path = p = path;
 953         while (p < end) {
 954                 if (!(q = strchr(p, '/')) || levels > 15)
 955                         q = end;
 956                 *q = '\0';
 957                 html_txt("/");
 958                 cgit_self_link(p, NULL, NULL);
 959                 if (q < end)
 960                         *q = '/';
 961                 p = q + 1;
 962                 ++levels;
 963         }
 964         ctx.qry.path = old_path;
 965 }
 966
 967 static void print_header(void)
 968 {
 969         char *logo = NULL, *logo_link = NULL;
 970
 971         html("<table id='header'>\n");
 972         html("<tr>\n");
 973
 974         if (ctx.repo && ctx.repo->logo && *ctx.repo->logo)
 975                 logo = ctx.repo->logo;
 976         else
 977                 logo = ctx.cfg.logo;
 978         if (ctx.repo && ctx.repo->logo_link && *ctx.repo->logo_link)
 979                 logo_link = ctx.repo->logo_link;
 980         else
 981                 logo_link = ctx.cfg.logo_link;
 982         if (logo && *logo) {
 983                 html("<td class='logo' rowspan='2'><a href='");
 984                 if (logo_link && *logo_link)
 985                         html_attr(logo_link);
 986                 else
 987                         html_attr(cgit_rooturl());
 988                 html("'><img src='");
 989                 html_attr(logo);
 990                 html("' alt='cgit logo'/></a></td>\n");
 991         }
 992
 993         html("<td class='main'>");
 994         if (ctx.repo) {
 995                 cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
 996                 html(" : ");
 997                 cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
 998                 if (ctx.env.authenticated) {
 999                         html("</td><td class='form'>");
1000                         html("<form method='get'>\n");
1001                         cgit_add_hidden_formfields(0, 1, ctx.qry.page);
1002                         html("<select name='h' onchange='this.form.submit();'>\n");
1003                         for_each_branch_ref(print_branch_option, ctx.qry.head);
1004                         if (ctx.repo->enable_remote_branches)
1005                                 for_each_remote_ref(print_branch_option, ctx.qry.head);
1006                         html("</select> ");
1007                         html("<input type='submit' value='switch'/>");
1008                         html("</form>");
1009                 }
1010         } else
1011                 html_txt(ctx.cfg.root_title);
1012         html("</td></tr>\n");
1013
1014         html("<tr><td class='sub'>");
1015         if (ctx.repo) {
1016                 html_txt(ctx.repo->desc);
1017                 html("</td><td class='sub right'>");
1018                 html_txt(ctx.repo->owner);
1019         } else {
1020                 if (ctx.cfg.root_desc)
1021                         html_txt(ctx.cfg.root_desc);
1022         }
1023         html("</td></tr></table>\n");
1024 }
1025
1026 void cgit_print_pageheader(void)
1027 {
1028         html("<div id='cgit'>");
1029         if (!ctx.env.authenticated || !ctx.cfg.noheader)
1030                 print_header();
1031
1032         html("<table class='tabs'><tr><td>\n");
1033         if (ctx.env.authenticated && ctx.repo) {
1034                 if (ctx.repo->readme.nr)
1035                         reporevlink("about", "about", NULL,
1036                                     hc("about"), ctx.qry.head, NULL,
1037                                     NULL);
1038                 cgit_summary_link("summary", NULL, hc("summary"),
1039                                   ctx.qry.head);
1040                 cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
1041                                ctx.qry.oid, NULL);
1042                 cgit_log_link("log", NULL, hc("log"), ctx.qry.head,
1043                               NULL, ctx.qry.vpath, 0, NULL, NULL,
1044                               ctx.qry.showmsg, ctx.qry.follow);
1045                 if (ctx.qry.page && !strcmp(ctx.qry.page, "blame"))
1046                         cgit_blame_link("blame", NULL, hc("blame"), ctx.qry.head,
1047                                         ctx.qry.oid, ctx.qry.vpath);
1048                 else
1049                         cgit_tree_link("tree", NULL, hc("tree"), ctx.qry.head,
1050                                        ctx.qry.oid, ctx.qry.vpath);
1051                 cgit_commit_link("commit", NULL, hc("commit"),
1052                                  ctx.qry.head, ctx.qry.oid, ctx.qry.vpath);
1053                 cgit_diff_link("diff", NULL, hc("diff"), ctx.qry.head,
1054                                ctx.qry.oid, ctx.qry.oid2, ctx.qry.vpath);
1055                 if (ctx.repo->max_stats)
1056                         cgit_stats_link("stats", NULL, hc("stats"),
1057                                         ctx.qry.head, ctx.qry.vpath);
1058                 if (ctx.repo->homepage) {
1059                         html("<a href='");
1060                         html_attr(ctx.repo->homepage);
1061                         html("'>homepage</a>");
1062                 }
1063                 html("</td><td class='form'>");
1064                 html("<form class='right' method='get' action='");
1065                 if (ctx.cfg.virtual_root) {
1066                         char *fileurl = cgit_fileurl(ctx.qry.repo, "log",
1067                                                    ctx.qry.vpath, NULL);
1068                         html_url_path(fileurl);
1069                         free(fileurl);
1070                 }
1071                 html("'>\n");
1072                 cgit_add_hidden_formfields(1, 0, "log");
1073                 html("<select name='qt'>\n");
1074                 html_option("grep", "log msg", ctx.qry.grep);
1075                 html_option("author", "author", ctx.qry.grep);
1076                 html_option("committer", "committer", ctx.qry.grep);
1077                 html_option("range", "range", ctx.qry.grep);
1078                 html("</select>\n");
1079                 html("<input class='txt' type='search' size='10' name='q' value='");
1080                 html_attr(ctx.qry.search);
1081                 html("'/>\n");
1082                 html("<input type='submit' value='search'/>\n");
1083                 html("</form>\n");
1084         } else if (ctx.env.authenticated) {
1085                 char *currenturl = cgit_currenturl();
1086                 site_link(NULL, "index", NULL, hc("repolist"), NULL, NULL, 0, 1);
1087                 if (ctx.cfg.root_readme)
1088                         site_link("about", "about", NULL, hc("about"),
1089                                   NULL, NULL, 0, 1);
1090                 html("</td><td class='form'>");
1091                 html("<form method='get' action='");
1092                 html_attr(currenturl);
1093                 html("'>\n");
1094                 html("<input type='search' name='q' size='10' value='");
1095                 html_attr(ctx.qry.search);
1096                 html("'/>\n");
1097                 html("<input type='submit' value='search'/>\n");
1098                 html("</form>");
1099                 free(currenturl);
1100         }
1101         html("</td></tr></table>\n");
1102         if (ctx.env.authenticated && ctx.repo && ctx.qry.vpath) {
1103                 html("<div class='path'>");
1104                 html("path: ");
1105                 cgit_print_path_crumbs(ctx.qry.vpath);
1106                 if (ctx.cfg.enable_follow_links && !strcmp(ctx.qry.page, "log")) {
1107                         html(" (");
1108                         ctx.qry.follow = !ctx.qry.follow;
1109                         cgit_self_link(ctx.qry.follow ? "follow" : "unfollow",
1110                                         NULL, NULL);
1111                         ctx.qry.follow = !ctx.qry.follow;
1112                         html(")");
1113                 }
1114                 html("</div>");
1115         }
1116         html("<div class='content'>");
1117 }
1118
1119 void cgit_print_filemode(unsigned short mode)
1120 {
1121         if (S_ISDIR(mode))
1122                 html("d");
1123         else if (S_ISLNK(mode))
1124                 html("l");
1125         else if (S_ISGITLINK(mode))
1126                 html("m");
1127         else
1128                 html("-");
1129         html_fileperm(mode >> 6);
1130         html_fileperm(mode >> 3);
1131         html_fileperm(mode);
1132 }
1133
1134 void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
1135                                   const char *ref)
1136 {
1137         struct object_id oid;
1138
1139         /*
1140          * Prettify snapshot names by stripping leading "v" or "V" if the tag
1141          * name starts with {v,V}[0-9] and the prettify mapping is injective,
1142          * i.e. each stripped tag can be inverted without ambiguities.
1143          */
1144         if (get_oid(fmt("refs/tags/%s", ref), &oid) == 0 &&
1145             (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
1146             ((get_oid(fmt("refs/tags/%s", ref + 1), &oid) == 0) +
1147              (get_oid(fmt("refs/tags/v%s", ref + 1), &oid) == 0) +
1148              (get_oid(fmt("refs/tags/V%s", ref + 1), &oid) == 0) == 1))
1149                 ref++;
1150
1151         strbuf_addf(filename, "%s-%s", base, ref);
1152 }
1153
1154 void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref,
1155                                const char *separator)
1156 {
1157         const struct cgit_snapshot_format *f;
1158         struct strbuf filename = STRBUF_INIT;
1159         const char *basename;
1160         size_t prefixlen;
1161
1162         basename = cgit_snapshot_prefix(repo);
1163         if (starts_with(ref, basename))
1164                 strbuf_addstr(&filename, ref);
1165         else
1166                 cgit_compose_snapshot_prefix(&filename, basename, ref);
1167
1168         prefixlen = filename.len;
1169         for (f = cgit_snapshot_formats; f->suffix; f++) {
1170                 if (!(repo->snapshots & cgit_snapshot_format_bit(f)))
1171                         continue;
1172                 strbuf_setlen(&filename, prefixlen);
1173                 strbuf_addstr(&filename, f->suffix);
1174                 cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL,
1175                                    filename.buf);
1176                 if (cgit_snapshot_get_sig(ref, f)) {
1177                         strbuf_addstr(&filename, ".asc");
1178                         html(" (");
1179                         cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
1180                                            filename.buf);
1181                         html(")");
1182                 } else if (starts_with(f->suffix, ".tar") && cgit_snapshot_get_sig(ref, &cgit_snapshot_formats[0])) {
1183                         strbuf_setlen(&filename, strlen(filename.buf) - strlen(f->suffix));
1184                         strbuf_addstr(&filename, ".tar.asc");
1185                         html(" (");
1186                         cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
1187                                            filename.buf);
1188                         html(")");
1189                 }
1190                 html(separator);
1191         }
1192         strbuf_release(&filename);
1193 }
1194
1195 void cgit_set_title_from_path(const char *path)
1196 {
1197         struct strbuf sb = STRBUF_INIT;
1198         const char *slash, *last_slash;
1199
1200         if (!path)
1201                 return;
1202
1203         for (last_slash = path + strlen(path); (slash = memrchr(path, '/', last_slash - path)) != NULL; last_slash = slash) {
1204                 strbuf_add(&sb, slash + 1, last_slash - slash - 1);
1205                 strbuf_addstr(&sb, " \xc2\xab ");
1206         }
1207         strbuf_add(&sb, path, last_slash - path);
1208         strbuf_addf(&sb, " - %s", ctx.page.title);
1209         ctx.page.title = strbuf_detach(&sb, NULL);
1210 }