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         size_t len = strlen(root);
  72
  73         if (!ctx.qry.url)
  74                 return xstrdup(root);
  75         if (len && root[len - 1] == '/')
  76                 return fmtalloc("%s%s", root, ctx.qry.url);
  77         return fmtalloc("%s/%s", root, ctx.qry.url);
  78 }
  79
  80 const char *cgit_rooturl(void)
  81 {
  82         if (ctx.cfg.virtual_root)
  83                 return ctx.cfg.virtual_root;
  84         else
  85                 return ctx.cfg.script_name;
  86 }
  87
  88 const char *cgit_loginurl(void)
  89 {
  90         static const char *login_url;
  91         if (!login_url)
  92                 login_url = fmtalloc("%s?p=login", cgit_rooturl());
  93         return login_url;
  94 }
  95
  96 char *cgit_repourl(const char *reponame)
  97 {
  98         if (ctx.cfg.virtual_root)
  99                 return fmtalloc("%s%s/", ctx.cfg.virtual_root, reponame);
 100         else
 101                 return fmtalloc("?r=%s", reponame);
 102 }
 103
 104 char *cgit_fileurl(const char *reponame, const char *pagename,
 105                    const char *filename, const char *query)
 106 {
 107         struct strbuf sb = STRBUF_INIT;
 108         char *delim;
 109
 110         if (ctx.cfg.virtual_root) {
 111                 strbuf_addf(&sb, "%s%s/%s/%s", ctx.cfg.virtual_root, reponame,
 112                             pagename, (filename ? filename:""));
 113                 delim = "?";
 114         } else {
 115                 strbuf_addf(&sb, "?url=%s/%s/%s", reponame, pagename,
 116                             (filename ? filename : ""));
 117                 delim = "&amp;";
 118         }
 119         if (query)
 120                 strbuf_addf(&sb, "%s%s", delim, query);
 121         return strbuf_detach(&sb, NULL);
 122 }
 123
 124 char *cgit_pageurl(const char *reponame, const char *pagename,
 125                    const char *query)
 126 {
 127         return cgit_fileurl(reponame, pagename, NULL, query);
 128 }
 129
 130 const char *cgit_repobasename(const char *reponame)
 131 {
 132         /* I assume we don't need to store more than one repo basename */
 133         static char rvbuf[1024];
 134         int p;
 135         const char *rv;
 136         strncpy(rvbuf, reponame, sizeof(rvbuf));
 137         if (rvbuf[sizeof(rvbuf)-1])
 138                 die("cgit_repobasename: truncated repository name '%s'", reponame);
 139         p = strlen(rvbuf)-1;
 140         /* strip trailing slashes */
 141         while (p && rvbuf[p] == '/') rvbuf[p--] = 0;
 142         /* strip trailing .git */
 143         if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
 144                 p -= 3; rvbuf[p--] = 0;
 145         }
 146         /* strip more trailing slashes if any */
 147         while ( p && rvbuf[p] == '/') rvbuf[p--] = 0;
 148         /* find last slash in the remaining string */
 149         rv = strrchr(rvbuf,'/');
 150         if (rv)
 151                 return ++rv;
 152         return rvbuf;
 153 }
 154
 155 static void site_url(const char *page, const char *search, const char *sort, int ofs, int always_root)
 156 {
 157         char *delim = "?";
 158
 159         if (always_root || page)
 160                 html_attr(cgit_rooturl());
 161         else {
 162                 char *currenturl = cgit_currenturl();
 163                 html_attr(currenturl);
 164                 free(currenturl);
 165         }
 166
 167         if (page) {
 168                 htmlf("?p=%s", page);
 169                 delim = "&amp;";
 170         }
 171         if (search) {
 172                 html(delim);
 173                 html("q=");
 174                 html_attr(search);
 175                 delim = "&amp;";
 176         }
 177         if (sort) {
 178                 html(delim);
 179                 html("s=");
 180                 html_attr(sort);
 181                 delim = "&amp;";
 182         }
 183         if (ofs) {
 184                 html(delim);
 185                 htmlf("ofs=%d", ofs);
 186         }
 187 }
 188
 189 static void site_link(const char *page, const char *name, const char *title,
 190                       const char *class, const char *search, const char *sort, int ofs, int always_root)
 191 {
 192         html("<a");
 193         if (title) {
 194                 html(" title='");
 195                 html_attr(title);
 196                 html("'");
 197         }
 198         if (class) {
 199                 html(" class='");
 200                 html_attr(class);
 201                 html("'");
 202         }
 203         html(" href='");
 204         site_url(page, search, sort, ofs, always_root);
 205         html("'>");
 206         html_txt(name);
 207         html("</a>");
 208 }
 209
 210 void cgit_index_link(const char *name, const char *title, const char *class,
 211                      const char *pattern, const char *sort, int ofs, int always_root)
 212 {
 213         site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 214 }
 215
 216 static char *repolink(const char *title, const char *class, const char *page,
 217                       const char *head, const char *path)
 218 {
 219         char *delim = "?";
 220
 221         html("<a");
 222         if (title) {
 223                 html(" title='");
 224                 html_attr(title);
 225                 html("'");
 226         }
 227         if (class) {
 228                 html(" class='");
 229                 html_attr(class);
 230                 html("'");
 231         }
 232         html(" href='");
 233         if (ctx.cfg.virtual_root) {
 234                 html_url_path(ctx.cfg.virtual_root);
 235                 html_url_path(ctx.repo->url);
 236                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 237                         html("/");
 238                 if (page) {
 239                         html_url_path(page);
 240                         html("/");
 241                         if (path)
 242                                 html_url_path(path);
 243                 }
 244         } else {
 245                 html_url_path(ctx.cfg.script_name);
 246                 html("?url=");
 247                 html_url_arg(ctx.repo->url);
 248                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 249                         html("/");
 250                 if (page) {
 251                         html_url_arg(page);
 252                         html("/");
 253                         if (path)
 254                                 html_url_arg(path);
 255                 }
 256                 delim = "&amp;";
 257         }
 258         if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
 259                 html(delim);
 260                 html("h=");
 261                 html_url_arg(head);
 262                 delim = "&amp;";
 263         }
 264         return fmt("%s", delim);
 265 }
 266
 267 static void reporevlink(const char *page, const char *name, const char *title,
 268                         const char *class, const char *head, const char *rev,
 269                         const char *path)
 270 {
 271         char *delim;
 272
 273         delim = repolink(title, class, page, head, path);
 274         if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
 275                 html(delim);
 276                 html("id=");
 277                 html_url_arg(rev);
 278         }
 279         html("'>");
 280         html_txt(name);
 281         html("</a>");
 282 }
 283
 284 void cgit_summary_link(const char *name, const char *title, const char *class,
 285                        const char *head)
 286 {
 287         reporevlink(NULL, name, title, class, head, NULL, NULL);
 288 }
 289
 290 void cgit_tag_link(const char *name, const char *title, const char *class,
 291                    const char *tag)
 292 {
 293         reporevlink("tag", name, title, class, tag, NULL, NULL);
 294 }
 295
 296 void cgit_tree_link(const char *name, const char *title, const char *class,
 297                     const char *head, const char *rev, const char *path)
 298 {
 299         reporevlink("tree", name, title, class, head, rev, path);
 300 }
 301
 302 void cgit_plain_link(const char *name, const char *title, const char *class,
 303                      const char *head, const char *rev, const char *path)
 304 {
 305         reporevlink("plain", name, title, class, head, rev, path);
 306 }
 307
 308 void cgit_blame_link(const char *name, const char *title, const char *class,
 309                      const char *head, const char *rev, const char *path)
 310 {
 311         reporevlink("blame", name, title, class, head, rev, path);
 312 }
 313
 314 void cgit_log_link(const char *name, const char *title, const char *class,
 315                    const char *head, const char *rev, const char *path,
 316                    int ofs, const char *grep, const char *pattern, int showmsg,
 317                    int follow)
 318 {
 319         char *delim;
 320
 321         delim = repolink(title, class, "log", head, path);
 322         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 323                 html(delim);
 324                 html("id=");
 325                 html_url_arg(rev);
 326                 delim = "&amp;";
 327         }
 328         if (grep && pattern) {
 329                 html(delim);
 330                 html("qt=");
 331                 html_url_arg(grep);
 332                 delim = "&amp;";
 333                 html(delim);
 334                 html("q=");
 335                 html_url_arg(pattern);
 336         }
 337         if (ofs > 0) {
 338                 html(delim);
 339                 html("ofs=");
 340                 htmlf("%d", ofs);
 341                 delim = "&amp;";
 342         }
 343         if (showmsg) {
 344                 html(delim);
 345                 html("showmsg=1");
 346                 delim = "&amp;";
 347         }
 348         if (follow) {
 349                 html(delim);
 350                 html("follow=1");
 351         }
 352         html("'>");
 353         html_txt(name);
 354         html("</a>");
 355 }
 356
 357 void cgit_commit_link(const char *name, const char *title, const char *class,
 358                       const char *head, const char *rev, const char *path)
 359 {
 360         char *delim;
 361
 362         delim = repolink(title, class, "commit", head, path);
 363         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 364                 html(delim);
 365                 html("id=");
 366                 html_url_arg(rev);
 367                 delim = "&amp;";
 368         }
 369         if (ctx.qry.difftype) {
 370                 html(delim);
 371                 htmlf("dt=%d", ctx.qry.difftype);
 372                 delim = "&amp;";
 373         }
 374         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 375                 html(delim);
 376                 html("context=");
 377                 htmlf("%d", ctx.qry.context);
 378                 delim = "&amp;";
 379         }
 380         if (ctx.qry.ignorews) {
 381                 html(delim);
 382                 html("ignorews=1");
 383                 delim = "&amp;";
 384         }
 385         if (ctx.qry.follow) {
 386                 html(delim);
 387                 html("follow=1");
 388         }
 389         html("'>");
 390         if (name[0] != '\0') {
 391                 if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
 392                         html_ntxt(name, ctx.cfg.max_msg_len - 3);
 393                         html("...");
 394                 } else
 395                         html_txt(name);
 396         } else
 397                 html_txt("(no commit message)");
 398         html("</a>");
 399 }
 400
 401 void cgit_refs_link(const char *name, const char *title, const char *class,
 402                     const char *head, const char *rev, const char *path)
 403 {
 404         reporevlink("refs", name, title, class, head, rev, path);
 405 }
 406
 407 void cgit_snapshot_link(const char *name, const char *title, const char *class,
 408                         const char *head, const char *rev,
 409                         const char *archivename)
 410 {
 411         reporevlink("snapshot", name, title, class, head, rev, archivename);
 412 }
 413
 414 void cgit_diff_link(const char *name, const char *title, const char *class,
 415                     const char *head, const char *new_rev, const char *old_rev,
 416                     const char *path)
 417 {
 418         char *delim;
 419
 420         delim = repolink(title, class, "diff", head, path);
 421         if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
 422                 html(delim);
 423                 html("id=");
 424                 html_url_arg(new_rev);
 425                 delim = "&amp;";
 426         }
 427         if (old_rev) {
 428                 html(delim);
 429                 html("id2=");
 430                 html_url_arg(old_rev);
 431                 delim = "&amp;";
 432         }
 433         if (ctx.qry.difftype) {
 434                 html(delim);
 435                 htmlf("dt=%d", ctx.qry.difftype);
 436                 delim = "&amp;";
 437         }
 438         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 439                 html(delim);
 440                 html("context=");
 441                 htmlf("%d", ctx.qry.context);
 442                 delim = "&amp;";
 443         }
 444         if (ctx.qry.ignorews) {
 445                 html(delim);
 446                 html("ignorews=1");
 447                 delim = "&amp;";
 448         }
 449         if (ctx.qry.follow) {
 450                 html(delim);
 451                 html("follow=1");
 452         }
 453         html("'>");
 454         html_txt(name);
 455         html("</a>");
 456 }
 457
 458 void cgit_patch_link(const char *name, const char *title, const char *class,
 459                      const char *head, const char *rev, const char *path)
 460 {
 461         reporevlink("patch", name, title, class, head, rev, path);
 462 }
 463
 464 void cgit_stats_link(const char *name, const char *title, const char *class,
 465                      const char *head, const char *path)
 466 {
 467         reporevlink("stats", name, title, class, head, NULL, path);
 468 }
 469
 470 static void cgit_self_link(char *name, const char *title, const char *class)
 471 {
 472         if (!strcmp(ctx.qry.page, "repolist"))
 473                 cgit_index_link(name, title, class, ctx.qry.search, ctx.qry.sort,
 474                                 ctx.qry.ofs, 1);
 475         else if (!strcmp(ctx.qry.page, "summary"))
 476                 cgit_summary_link(name, title, class, ctx.qry.head);
 477         else if (!strcmp(ctx.qry.page, "tag"))
 478                 cgit_tag_link(name, title, class, ctx.qry.has_sha1 ?
 479                                ctx.qry.sha1 : ctx.qry.head);
 480         else if (!strcmp(ctx.qry.page, "tree"))
 481                 cgit_tree_link(name, title, class, ctx.qry.head,
 482                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 483                                ctx.qry.path);
 484         else if (!strcmp(ctx.qry.page, "plain"))
 485                 cgit_plain_link(name, title, class, ctx.qry.head,
 486                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 487                                 ctx.qry.path);
 488         else if (!strcmp(ctx.qry.page, "blame"))
 489                 cgit_blame_link(name, title, class, ctx.qry.head,
 490                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 491                                 ctx.qry.path);
 492         else if (!strcmp(ctx.qry.page, "log"))
 493                 cgit_log_link(name, title, class, ctx.qry.head,
 494                               ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 495                               ctx.qry.path, ctx.qry.ofs,
 496                               ctx.qry.grep, ctx.qry.search,
 497                               ctx.qry.showmsg, ctx.qry.follow);
 498         else if (!strcmp(ctx.qry.page, "commit"))
 499                 cgit_commit_link(name, title, class, ctx.qry.head,
 500                                  ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 501                                  ctx.qry.path);
 502         else if (!strcmp(ctx.qry.page, "patch"))
 503                 cgit_patch_link(name, title, class, ctx.qry.head,
 504                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 505                                 ctx.qry.path);
 506         else if (!strcmp(ctx.qry.page, "refs"))
 507                 cgit_refs_link(name, title, class, ctx.qry.head,
 508                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 509                                ctx.qry.path);
 510         else if (!strcmp(ctx.qry.page, "snapshot"))
 511                 cgit_snapshot_link(name, title, class, ctx.qry.head,
 512                                    ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 513                                    ctx.qry.path);
 514         else if (!strcmp(ctx.qry.page, "diff"))
 515                 cgit_diff_link(name, title, class, ctx.qry.head,
 516                                ctx.qry.sha1, ctx.qry.sha2,
 517                                ctx.qry.path);
 518         else if (!strcmp(ctx.qry.page, "stats"))
 519                 cgit_stats_link(name, title, class, ctx.qry.head,
 520                                 ctx.qry.path);
 521         else {
 522                 /* Don't known how to make link for this page */
 523                 repolink(title, class, ctx.qry.page, ctx.qry.head, ctx.qry.path);
 524                 html("><!-- cgit_self_link() doesn't know how to make link for page '");
 525                 html_txt(ctx.qry.page);
 526                 html("' -->");
 527                 html_txt(name);
 528                 html("</a>");
 529         }
 530 }
 531
 532 void cgit_object_link(struct object *obj)
 533 {
 534         char *page, *shortrev, *fullrev, *name;
 535
 536         fullrev = oid_to_hex(&obj->oid);
 537         shortrev = xstrdup(fullrev);
 538         shortrev[10] = '\0';
 539         if (obj->type == OBJ_COMMIT) {
 540                 cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
 541                                  ctx.qry.head, fullrev, NULL);
 542                 return;
 543         } else if (obj->type == OBJ_TREE)
 544                 page = "tree";
 545         else if (obj->type == OBJ_TAG)
 546                 page = "tag";
 547         else
 548                 page = "blob";
 549         name = fmt("%s %s...", type_name(obj->type), shortrev);
 550         reporevlink(page, name, NULL, NULL, ctx.qry.head, fullrev, NULL);
 551 }
 552
 553 static struct string_list_item *lookup_path(struct string_list *list,
 554                                             const char *path)
 555 {
 556         struct string_list_item *item;
 557
 558         while (path && path[0]) {
 559                 if ((item = string_list_lookup(list, path)))
 560                         return item;
 561                 if (!(path = strchr(path, '/')))
 562                         break;
 563                 path++;
 564         }
 565         return NULL;
 566 }
 567
 568 void cgit_submodule_link(const char *class, char *path, const char *rev)
 569 {
 570         struct string_list *list;
 571         struct string_list_item *item;
 572         char tail, *dir;
 573         size_t len;
 574
 575         len = 0;
 576         tail = 0;
 577         list = &ctx.repo->submodules;
 578         item = lookup_path(list, path);
 579         if (!item) {
 580                 len = strlen(path);
 581                 tail = path[len - 1];
 582                 if (tail == '/') {
 583                         path[len - 1] = 0;
 584                         item = lookup_path(list, path);
 585                 }
 586         }
 587         if (item || ctx.repo->module_link) {
 588                 html("<a ");
 589                 if (class)
 590                         htmlf("class='%s' ", class);
 591                 html("href='");
 592                 if (item) {
 593                         html_attrf(item->util, rev);
 594                 } else {
 595                         dir = strrchr(path, '/');
 596                         if (dir)
 597                                 dir++;
 598                         else
 599                                 dir = path;
 600                         html_attrf(ctx.repo->module_link, dir, rev);
 601                 }
 602                 html("'>");
 603                 html_txt(path);
 604                 html("</a>");
 605         } else {
 606                 html("<span");
 607                 if (class)
 608                         htmlf(" class='%s'", class);
 609                 html(">");
 610                 html_txt(path);
 611                 html("</span>");
 612         }
 613         html_txtf(" @ %.7s", rev);
 614         if (item && tail)
 615                 path[len - 1] = tail;
 616 }
 617
 618 const struct date_mode *cgit_date_mode(enum date_mode_type type)
 619 {
 620         static struct date_mode mode;
 621         mode.type = type;
 622         mode.local = ctx.cfg.local_time;
 623         return &mode;
 624 }
 625
 626 static void print_rel_date(time_t t, int tz, double value,
 627         const char *class, const char *suffix)
 628 {
 629         htmlf("<span class='%s' title='", class);
 630         html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 631         htmlf("'>%.0f %s</span>", value, suffix);
 632 }
 633
 634 void cgit_print_age(time_t t, int tz, time_t max_relative)
 635 {
 636         time_t now, secs;
 637
 638         if (!t)
 639                 return;
 640         time(&now);
 641         secs = now - t;
 642         if (secs < 0)
 643                 secs = 0;
 644
 645         if (secs > max_relative && max_relative >= 0) {
 646                 html("<span title='");
 647                 html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 648                 html("'>");
 649                 html_txt(show_date(t, tz, cgit_date_mode(DATE_SHORT)));
 650                 html("</span>");
 651                 return;
 652         }
 653
 654         if (secs < TM_HOUR * 2) {
 655                 print_rel_date(t, tz, secs * 1.0 / TM_MIN, "age-mins", "min.");
 656                 return;
 657         }
 658         if (secs < TM_DAY * 2) {
 659                 print_rel_date(t, tz, secs * 1.0 / TM_HOUR, "age-hours", "hours");
 660                 return;
 661         }
 662         if (secs < TM_WEEK * 2) {
 663                 print_rel_date(t, tz, secs * 1.0 / TM_DAY, "age-days", "days");
 664                 return;
 665         }
 666         if (secs < TM_MONTH * 2) {
 667                 print_rel_date(t, tz, secs * 1.0 / TM_WEEK, "age-weeks", "weeks");
 668                 return;
 669         }
 670         if (secs < TM_YEAR * 2) {
 671                 print_rel_date(t, tz, secs * 1.0 / TM_MONTH, "age-months", "months");
 672                 return;
 673         }
 674         print_rel_date(t, tz, secs * 1.0 / TM_YEAR, "age-years", "years");
 675 }
 676
 677 void cgit_print_http_headers(void)
 678 {
 679         if (ctx.env.no_http && !strcmp(ctx.env.no_http, "1"))
 680                 return;
 681
 682         if (ctx.page.status)
 683                 htmlf("Status: %d %s\n", ctx.page.status, ctx.page.statusmsg);
 684         if (ctx.page.mimetype && ctx.page.charset)
 685                 htmlf("Content-Type: %s; charset=%s\n", ctx.page.mimetype,
 686                       ctx.page.charset);
 687         else if (ctx.page.mimetype)
 688                 htmlf("Content-Type: %s\n", ctx.page.mimetype);
 689         if (ctx.page.size)
 690                 htmlf("Content-Length: %zd\n", ctx.page.size);
 691         if (ctx.page.filename) {
 692                 html("Content-Disposition: inline; filename=\"");
 693                 html_header_arg_in_quotes(ctx.page.filename);
 694                 html("\"\n");
 695         }
 696         if (!ctx.env.authenticated)
 697                 html("Cache-Control: no-cache, no-store\n");
 698         htmlf("Last-Modified: %s\n", http_date(ctx.page.modified));
 699         htmlf("Expires: %s\n", http_date(ctx.page.expires));
 700         if (ctx.page.etag)
 701                 htmlf("ETag: \"%s\"\n", ctx.page.etag);
 702         html("\n");
 703         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 704                 exit(0);
 705 }
 706
 707 void cgit_redirect(const char *url, bool permanent)
 708 {
 709         htmlf("Status: %d %s\n", permanent ? 301 : 302, permanent ? "Moved" : "Found");
 710         html("Location: ");
 711         html_url_path(url);
 712         html("\n\n");
 713 }
 714
 715 static void print_rel_vcs_link(const char *url)
 716 {
 717         html("<link rel='vcs-git' href='");
 718         html_attr(url);
 719         html("' title='");
 720         html_attr(ctx.repo->name);
 721         html(" Git repository'/>\n");
 722 }
 723
 724 void cgit_print_docstart(void)
 725 {
 726         char *host = cgit_hosturl();
 727
 728         if (ctx.cfg.embedded) {
 729                 if (ctx.cfg.header)
 730                         html_include(ctx.cfg.header);
 731                 return;
 732         }
 733
 734         html(cgit_doctype);
 735         html("<html lang='en'>\n");
 736         html("<head>\n");
 737         html("<title>");
 738         html_txt(ctx.page.title);
 739         html("</title>\n");
 740         htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
 741         if (ctx.cfg.robots && *ctx.cfg.robots)
 742                 htmlf("<meta name='robots' content='%s'/>\n", ctx.cfg.robots);
 743         html("<link rel='stylesheet' type='text/css' href='");
 744         html_attr(ctx.cfg.css);
 745         html("'/>\n");
 746         if (ctx.cfg.favicon) {
 747                 html("<link rel='shortcut icon' href='");
 748                 html_attr(ctx.cfg.favicon);
 749                 html("'/>\n");
 750         }
 751         if (host && ctx.repo && ctx.qry.head) {
 752                 char *fileurl;
 753                 struct strbuf sb = STRBUF_INIT;
 754                 strbuf_addf(&sb, "h=%s", ctx.qry.head);
 755
 756                 html("<link rel='alternate' title='Atom feed' href='");
 757                 html(cgit_httpscheme());
 758                 html_attr(host);
 759                 fileurl = cgit_fileurl(ctx.repo->url, "atom", ctx.qry.vpath,
 760                                        sb.buf);
 761                 html_attr(fileurl);
 762                 html("' type='application/atom+xml'/>\n");
 763                 strbuf_release(&sb);
 764                 free(fileurl);
 765         }
 766         if (ctx.repo)
 767                 cgit_add_clone_urls(print_rel_vcs_link);
 768         if (ctx.cfg.head_include)
 769                 html_include(ctx.cfg.head_include);
 770         html("</head>\n");
 771         html("<body>\n");
 772         if (ctx.cfg.header)
 773                 html_include(ctx.cfg.header);
 774         free(host);
 775 }
 776
 777 void cgit_print_docend(void)
 778 {
 779         html("</div> <!-- class=content -->\n");
 780         if (ctx.cfg.embedded) {
 781                 html("</div> <!-- id=cgit -->\n");
 782                 if (ctx.cfg.footer)
 783                         html_include(ctx.cfg.footer);
 784                 return;
 785         }
 786         if (ctx.cfg.footer)
 787                 html_include(ctx.cfg.footer);
 788         else {
 789                 htmlf("<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit %s</a> "
 790                         "(<a href='https://git-scm.com/'>git %s</a>) at ", cgit_version, git_version_string);
 791                 html_txt(show_date(time(NULL), 0, cgit_date_mode(DATE_ISO8601)));
 792                 html("</div>\n");
 793         }
 794         html("</div> <!-- id=cgit -->\n");
 795         html("</body>\n</html>\n");
 796 }
 797
 798 void cgit_print_error_page(int code, const char *msg, const char *fmt, ...)
 799 {
 800         va_list ap;
 801         ctx.page.expires = ctx.cfg.cache_dynamic_ttl;
 802         ctx.page.status = code;
 803         ctx.page.statusmsg = msg;
 804         cgit_print_layout_start();
 805         va_start(ap, fmt);
 806         cgit_vprint_error(fmt, ap);
 807         va_end(ap);
 808         cgit_print_layout_end();
 809 }
 810
 811 void cgit_print_layout_start(void)
 812 {
 813         cgit_print_http_headers();
 814         cgit_print_docstart();
 815         cgit_print_pageheader();
 816 }
 817
 818 void cgit_print_layout_end(void)
 819 {
 820         cgit_print_docend();
 821 }
 822
 823 static void add_clone_urls(void (*fn)(const char *), char *txt, char *suffix)
 824 {
 825         struct strbuf **url_list = strbuf_split_str(txt, ' ', 0);
 826         int i;
 827
 828         for (i = 0; url_list[i]; i++) {
 829                 strbuf_rtrim(url_list[i]);
 830                 if (url_list[i]->len == 0)
 831                         continue;
 832                 if (suffix && *suffix)
 833                         strbuf_addf(url_list[i], "/%s", suffix);
 834                 fn(url_list[i]->buf);
 835         }
 836
 837         strbuf_list_free(url_list);
 838 }
 839
 840 void cgit_add_clone_urls(void (*fn)(const char *))
 841 {
 842         if (ctx.repo->clone_url)
 843                 add_clone_urls(fn, expand_macros(ctx.repo->clone_url), NULL);
 844         else if (ctx.cfg.clone_prefix)
 845                 add_clone_urls(fn, ctx.cfg.clone_prefix, ctx.repo->url);
 846 }
 847
 848 static int print_branch_option(const char *refname, const struct object_id *oid,
 849                                int flags, void *cb_data)
 850 {
 851         char *name = (char *)refname;
 852         html_option(name, name, ctx.qry.head);
 853         return 0;
 854 }
 855
 856 void cgit_add_hidden_formfields(int incl_head, int incl_search,
 857                                 const char *page)
 858 {
 859         if (!ctx.cfg.virtual_root) {
 860                 struct strbuf url = STRBUF_INIT;
 861
 862                 strbuf_addf(&url, "%s/%s", ctx.qry.repo, page);
 863                 if (ctx.qry.vpath)
 864                         strbuf_addf(&url, "/%s", ctx.qry.vpath);
 865                 html_hidden("url", url.buf);
 866                 strbuf_release(&url);
 867         }
 868
 869         if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
 870             strcmp(ctx.qry.head, ctx.repo->defbranch))
 871                 html_hidden("h", ctx.qry.head);
 872
 873         if (ctx.qry.sha1)
 874                 html_hidden("id", ctx.qry.sha1);
 875         if (ctx.qry.sha2)
 876                 html_hidden("id2", ctx.qry.sha2);
 877         if (ctx.qry.showmsg)
 878                 html_hidden("showmsg", "1");
 879
 880         if (incl_search) {
 881                 if (ctx.qry.grep)
 882                         html_hidden("qt", ctx.qry.grep);
 883                 if (ctx.qry.search)
 884                         html_hidden("q", ctx.qry.search);
 885         }
 886 }
 887
 888 static const char *hc(const char *page)
 889 {
 890         if (!ctx.qry.page)
 891                 return NULL;
 892
 893         return strcmp(ctx.qry.page, page) ? NULL : "active";
 894 }
 895
 896 static void cgit_print_path_crumbs(char *path)
 897 {
 898         char *old_path = ctx.qry.path;
 899         char *p = path, *q, *end = path + strlen(path);
 900
 901         ctx.qry.path = NULL;
 902         cgit_self_link("root", NULL, NULL);
 903         ctx.qry.path = p = path;
 904         while (p < end) {
 905                 if (!(q = strchr(p, '/')))
 906                         q = end;
 907                 *q = '\0';
 908                 html_txt("/");
 909                 cgit_self_link(p, NULL, NULL);
 910                 if (q < end)
 911                         *q = '/';
 912                 p = q + 1;
 913         }
 914         ctx.qry.path = old_path;
 915 }
 916
 917 static void print_header(void)
 918 {
 919         char *logo = NULL, *logo_link = NULL;
 920
 921         html("<table id='header'>\n");
 922         html("<tr>\n");
 923
 924         if (ctx.repo && ctx.repo->logo && *ctx.repo->logo)
 925                 logo = ctx.repo->logo;
 926         else
 927                 logo = ctx.cfg.logo;
 928         if (ctx.repo && ctx.repo->logo_link && *ctx.repo->logo_link)
 929                 logo_link = ctx.repo->logo_link;
 930         else
 931                 logo_link = ctx.cfg.logo_link;
 932         if (logo && *logo) {
 933                 html("<td class='logo' rowspan='2'><a href='");
 934                 if (logo_link && *logo_link)
 935                         html_attr(logo_link);
 936                 else
 937                         html_attr(cgit_rooturl());
 938                 html("'><img src='");
 939                 html_attr(logo);
 940                 html("' alt='cgit logo'/></a></td>\n");
 941         }
 942
 943         html("<td class='main'>");
 944         if (ctx.repo) {
 945                 cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
 946                 html(" : ");
 947                 cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
 948                 if (ctx.env.authenticated) {
 949                         html("</td><td class='form'>");
 950                         html("<form method='get'>\n");
 951                         cgit_add_hidden_formfields(0, 1, ctx.qry.page);
 952                         html("<select name='h' onchange='this.form.submit();'>\n");
 953                         for_each_branch_ref(print_branch_option, ctx.qry.head);
 954                         if (ctx.repo->enable_remote_branches)
 955                                 for_each_remote_ref(print_branch_option, ctx.qry.head);
 956                         html("</select> ");
 957                         html("<input type='submit' value='switch'/>");
 958                         html("</form>");
 959                 }
 960         } else
 961                 html_txt(ctx.cfg.root_title);
 962         html("</td></tr>\n");
 963
 964         html("<tr><td class='sub'>");
 965         if (ctx.repo) {
 966                 html_txt(ctx.repo->desc);
 967                 html("</td><td class='sub right'>");
 968                 html_txt(ctx.repo->owner);
 969         } else {
 970                 if (ctx.cfg.root_desc)
 971                         html_txt(ctx.cfg.root_desc);
 972                 else if (ctx.cfg.index_info)
 973                         html_include(ctx.cfg.index_info);
 974         }
 975         html("</td></tr></table>\n");
 976 }
 977
 978 void cgit_print_pageheader(void)
 979 {
 980         html("<div id='cgit'>");
 981         if (!ctx.env.authenticated || !ctx.cfg.noheader)
 982                 print_header();
 983
 984         html("<table class='tabs'><tr><td>\n");
 985         if (ctx.env.authenticated && ctx.repo) {
 986                 if (ctx.repo->readme.nr)
 987                         reporevlink("about", "about", NULL,
 988                                     hc("about"), ctx.qry.head, NULL,
 989                                     NULL);
 990                 cgit_summary_link("summary", NULL, hc("summary"),
 991                                   ctx.qry.head);
 992                 cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
 993                                ctx.qry.sha1, NULL);
 994                 cgit_log_link("log", NULL, hc("log"), ctx.qry.head,
 995                               NULL, ctx.qry.vpath, 0, NULL, NULL,
 996                               ctx.qry.showmsg, ctx.qry.follow);
 997                 if (ctx.qry.page && !strcmp(ctx.qry.page, "blame"))
 998                         cgit_blame_link("blame", NULL, hc("blame"), ctx.qry.head,
 999                                         ctx.qry.sha1, ctx.qry.vpath);
1000                 else
1001                         cgit_tree_link("tree", NULL, hc("tree"), ctx.qry.head,
1002                                        ctx.qry.sha1, ctx.qry.vpath);
1003                 cgit_commit_link("commit", NULL, hc("commit"),
1004                                  ctx.qry.head, ctx.qry.sha1, ctx.qry.vpath);
1005                 cgit_diff_link("diff", NULL, hc("diff"), ctx.qry.head,
1006                                ctx.qry.sha1, ctx.qry.sha2, ctx.qry.vpath);
1007                 if (ctx.repo->max_stats)
1008                         cgit_stats_link("stats", NULL, hc("stats"),
1009                                         ctx.qry.head, ctx.qry.vpath);
1010                 if (ctx.repo->homepage) {
1011                         html("<a href='");
1012                         html_attr(ctx.repo->homepage);
1013                         html("'>homepage</a>");
1014                 }
1015                 html("</td><td class='form'>");
1016                 html("<form class='right' method='get' action='");
1017                 if (ctx.cfg.virtual_root) {
1018                         char *fileurl = cgit_fileurl(ctx.qry.repo, "log",
1019                                                    ctx.qry.vpath, NULL);
1020                         html_url_path(fileurl);
1021                         free(fileurl);
1022                 }
1023                 html("'>\n");
1024                 cgit_add_hidden_formfields(1, 0, "log");
1025                 html("<select name='qt'>\n");
1026                 html_option("grep", "log msg", ctx.qry.grep);
1027                 html_option("author", "author", ctx.qry.grep);
1028                 html_option("committer", "committer", ctx.qry.grep);
1029                 html_option("range", "range", ctx.qry.grep);
1030                 html("</select>\n");
1031                 html("<input class='txt' type='search' size='10' name='q' value='");
1032                 html_attr(ctx.qry.search);
1033                 html("'/>\n");
1034                 html("<input type='submit' value='search'/>\n");
1035                 html("</form>\n");
1036         } else if (ctx.env.authenticated) {
1037                 char *currenturl = cgit_currenturl();
1038                 site_link(NULL, "index", NULL, hc("repolist"), NULL, NULL, 0, 1);
1039                 if (ctx.cfg.root_readme)
1040                         site_link("about", "about", NULL, hc("about"),
1041                                   NULL, NULL, 0, 1);
1042                 html("</td><td class='form'>");
1043                 html("<form method='get' action='");
1044                 html_attr(currenturl);
1045                 html("'>\n");
1046                 html("<input type='search' name='q' size='10' value='");
1047                 html_attr(ctx.qry.search);
1048                 html("'/>\n");
1049                 html("<input type='submit' value='search'/>\n");
1050                 html("</form>");
1051                 free(currenturl);
1052         }
1053         html("</td></tr></table>\n");
1054         if (ctx.env.authenticated && ctx.repo && ctx.qry.vpath) {
1055                 html("<div class='path'>");
1056                 html("path: ");
1057                 cgit_print_path_crumbs(ctx.qry.vpath);
1058                 if (ctx.cfg.enable_follow_links && !strcmp(ctx.qry.page, "log")) {
1059                         html(" (");
1060                         ctx.qry.follow = !ctx.qry.follow;
1061                         cgit_self_link(ctx.qry.follow ? "follow" : "unfollow",
1062                                         NULL, NULL);
1063                         ctx.qry.follow = !ctx.qry.follow;
1064                         html(")");
1065                 }
1066                 html("</div>");
1067         }
1068         html("<div class='content'>");
1069 }
1070
1071 void cgit_print_filemode(unsigned short mode)
1072 {
1073         if (S_ISDIR(mode))
1074                 html("d");
1075         else if (S_ISLNK(mode))
1076                 html("l");
1077         else if (S_ISGITLINK(mode))
1078                 html("m");
1079         else
1080                 html("-");
1081         html_fileperm(mode >> 6);
1082         html_fileperm(mode >> 3);
1083         html_fileperm(mode);
1084 }
1085
1086 void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
1087                                   const char *ref)
1088 {
1089         struct object_id oid;
1090
1091         /*
1092          * Prettify snapshot names by stripping leading "v" or "V" if the tag
1093          * name starts with {v,V}[0-9] and the prettify mapping is injective,
1094          * i.e. each stripped tag can be inverted without ambiguities.
1095          */
1096         if (get_oid(fmt("refs/tags/%s", ref), &oid) == 0 &&
1097             (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
1098             ((get_oid(fmt("refs/tags/%s", ref + 1), &oid) == 0) +
1099              (get_oid(fmt("refs/tags/v%s", ref + 1), &oid) == 0) +
1100              (get_oid(fmt("refs/tags/V%s", ref + 1), &oid) == 0) == 1))
1101                 ref++;
1102
1103         strbuf_addf(filename, "%s-%s", base, ref);
1104 }
1105
1106 void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *head,
1107                                const char *hex)
1108 {
1109         const struct cgit_snapshot_format* f;
1110         struct strbuf filename = STRBUF_INIT;
1111         size_t prefixlen;
1112
1113         cgit_compose_snapshot_prefix(&filename, cgit_repobasename(repo->url), hex);
1114         prefixlen = filename.len;
1115         for (f = cgit_snapshot_formats; f->suffix; f++) {
1116                 if (!(repo->snapshots & f->bit))
1117                         continue;
1118                 strbuf_setlen(&filename, prefixlen);
1119                 strbuf_addstr(&filename, f->suffix);
1120                 cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL,
1121                                    filename.buf);
1122                 html("<br/>");
1123         }
1124         strbuf_release(&filename);
1125 }
1126
1127 void cgit_set_title_from_path(const char *path)
1128 {
1129         size_t path_len, path_index, path_last_end;
1130         char *new_title;
1131
1132         if (!path)
1133                 return;
1134
1135         path_len = strlen(path);
1136         new_title = xmalloc(path_len + 3 + strlen(ctx.page.title) + 1);
1137         new_title[0] = '\0';
1138
1139         for (path_index = path_len, path_last_end = path_len; path_index-- > 0;) {
1140                 if (path[path_index] == '/') {
1141                         if (path_index == path_len - 1) {
1142                                 path_last_end = path_index - 1;
1143                                 continue;
1144                         }
1145                         strncat(new_title, &path[path_index + 1], path_last_end - path_index - 1);
1146                         strcat(new_title, "\\");
1147                         path_last_end = path_index;
1148                 }
1149         }
1150         if (path_last_end)
1151                 strncat(new_title, path, path_last_end);
1152
1153         strcat(new_title, " - ");
1154         strcat(new_title, ctx.page.title);
1155         ctx.page.title = new_title;
1156 }