ui-shared.c

   1 /* ui-shared.c: common web output functions
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "ui-shared.h"
  11 #include "cmd.h"
  12 #include "html.h"
  13
  14 static const char cgit_doctype[] =
  15 "<!DOCTYPE html>\n";
  16
  17 static char *http_date(time_t t)
  18 {
  19         static char day[][4] =
  20                 {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
  21         static char month[][4] =
  22                 {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
  23                  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
  24         struct tm *tm = gmtime(&t);
  25         return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
  26                    tm->tm_mday, month[tm->tm_mon], 1900 + tm->tm_year,
  27                    tm->tm_hour, tm->tm_min, tm->tm_sec);
  28 }
  29
  30 void cgit_print_error(const char *fmt, ...)
  31 {
  32         va_list ap;
  33         va_start(ap, fmt);
  34         cgit_vprint_error(fmt, ap);
  35         va_end(ap);
  36 }
  37
  38 void cgit_vprint_error(const char *fmt, va_list ap)
  39 {
  40         va_list cp;
  41         html("<div class='error'>");
  42         va_copy(cp, ap);
  43         html_vtxtf(fmt, cp);
  44         va_end(cp);
  45         html("</div>\n");
  46 }
  47
  48 const char *cgit_httpscheme(void)
  49 {
  50         if (ctx.env.https && !strcmp(ctx.env.https, "on"))
  51                 return "https://";
  52         else
  53                 return "http://";
  54 }
  55
  56 char *cgit_hosturl(void)
  57 {
  58         if (ctx.env.http_host)
  59                 return xstrdup(ctx.env.http_host);
  60         if (!ctx.env.server_name)
  61                 return NULL;
  62         if (!ctx.env.server_port || atoi(ctx.env.server_port) == 80)
  63                 return xstrdup(ctx.env.server_name);
  64         return fmtalloc("%s:%s", ctx.env.server_name, ctx.env.server_port);
  65 }
  66
  67 char *cgit_currenturl(void)
  68 {
  69         const char *root = cgit_rooturl();
  70         size_t len = strlen(root);
  71
  72         if (!ctx.qry.url)
  73                 return xstrdup(root);
  74         if (len && root[len - 1] == '/')
  75                 return fmtalloc("%s%s", root, ctx.qry.url);
  76         return fmtalloc("%s/%s", root, ctx.qry.url);
  77 }
  78
  79 const char *cgit_rooturl(void)
  80 {
  81         if (ctx.cfg.virtual_root)
  82                 return ctx.cfg.virtual_root;
  83         else
  84                 return ctx.cfg.script_name;
  85 }
  86
  87 const char *cgit_loginurl(void)
  88 {
  89         static const char *login_url;
  90         if (!login_url)
  91                 login_url = fmtalloc("%s?p=login", cgit_rooturl());
  92         return login_url;
  93 }
  94
  95 char *cgit_repourl(const char *reponame)
  96 {
  97         if (ctx.cfg.virtual_root)
  98                 return fmtalloc("%s%s/", ctx.cfg.virtual_root, reponame);
  99         else
 100                 return fmtalloc("?r=%s", reponame);
 101 }
 102
 103 char *cgit_fileurl(const char *reponame, const char *pagename,
 104                    const char *filename, const char *query)
 105 {
 106         struct strbuf sb = STRBUF_INIT;
 107         char *delim;
 108
 109         if (ctx.cfg.virtual_root) {
 110                 strbuf_addf(&sb, "%s%s/%s/%s", ctx.cfg.virtual_root, reponame,
 111                             pagename, (filename ? filename:""));
 112                 delim = "?";
 113         } else {
 114                 strbuf_addf(&sb, "?url=%s/%s/%s", reponame, pagename,
 115                             (filename ? filename : ""));
 116                 delim = "&amp;";
 117         }
 118         if (query)
 119                 strbuf_addf(&sb, "%s%s", delim, query);
 120         return strbuf_detach(&sb, NULL);
 121 }
 122
 123 char *cgit_pageurl(const char *reponame, const char *pagename,
 124                    const char *query)
 125 {
 126         return cgit_fileurl(reponame, pagename, NULL, query);
 127 }
 128
 129 const char *cgit_repobasename(const char *reponame)
 130 {
 131         /* I assume we don't need to store more than one repo basename */
 132         static char rvbuf[1024];
 133         int p;
 134         const char *rv;
 135         strncpy(rvbuf, reponame, sizeof(rvbuf));
 136         if (rvbuf[sizeof(rvbuf)-1])
 137                 die("cgit_repobasename: truncated repository name '%s'", reponame);
 138         p = strlen(rvbuf)-1;
 139         /* strip trailing slashes */
 140         while (p && rvbuf[p] == '/') rvbuf[p--] = 0;
 141         /* strip trailing .git */
 142         if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
 143                 p -= 3; rvbuf[p--] = 0;
 144         }
 145         /* strip more trailing slashes if any */
 146         while ( p && rvbuf[p] == '/') rvbuf[p--] = 0;
 147         /* find last slash in the remaining string */
 148         rv = strrchr(rvbuf,'/');
 149         if (rv)
 150                 return ++rv;
 151         return rvbuf;
 152 }
 153
 154 static void site_url(const char *page, const char *search, const char *sort, int ofs, int always_root)
 155 {
 156         char *delim = "?";
 157
 158         if (always_root || page)
 159                 html_attr(cgit_rooturl());
 160         else {
 161                 char *currenturl = cgit_currenturl();
 162                 html_attr(currenturl);
 163                 free(currenturl);
 164         }
 165
 166         if (page) {
 167                 htmlf("?p=%s", page);
 168                 delim = "&amp;";
 169         }
 170         if (search) {
 171                 html(delim);
 172                 html("q=");
 173                 html_attr(search);
 174                 delim = "&amp;";
 175         }
 176         if (sort) {
 177                 html(delim);
 178                 html("s=");
 179                 html_attr(sort);
 180                 delim = "&amp;";
 181         }
 182         if (ofs) {
 183                 html(delim);
 184                 htmlf("ofs=%d", ofs);
 185         }
 186 }
 187
 188 static void site_link(const char *page, const char *name, const char *title,
 189                       const char *class, const char *search, const char *sort, int ofs, int always_root)
 190 {
 191         html("<a");
 192         if (title) {
 193                 html(" title='");
 194                 html_attr(title);
 195                 html("'");
 196         }
 197         if (class) {
 198                 html(" class='");
 199                 html_attr(class);
 200                 html("'");
 201         }
 202         html(" href='");
 203         site_url(page, search, sort, ofs, always_root);
 204         html("'>");
 205         html_txt(name);
 206         html("</a>");
 207 }
 208
 209 void cgit_index_link(const char *name, const char *title, const char *class,
 210                      const char *pattern, const char *sort, int ofs, int always_root)
 211 {
 212         site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 213 }
 214
 215 static char *repolink(const char *title, const char *class, const char *page,
 216                       const char *head, const char *path)
 217 {
 218         char *delim = "?";
 219
 220         html("<a");
 221         if (title) {
 222                 html(" title='");
 223                 html_attr(title);
 224                 html("'");
 225         }
 226         if (class) {
 227                 html(" class='");
 228                 html_attr(class);
 229                 html("'");
 230         }
 231         html(" href='");
 232         if (ctx.cfg.virtual_root) {
 233                 html_url_path(ctx.cfg.virtual_root);
 234                 html_url_path(ctx.repo->url);
 235                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 236                         html("/");
 237                 if (page) {
 238                         html_url_path(page);
 239                         html("/");
 240                         if (path)
 241                                 html_url_path(path);
 242                 }
 243         } else {
 244                 html_url_path(ctx.cfg.script_name);
 245                 html("?url=");
 246                 html_url_arg(ctx.repo->url);
 247                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 248                         html("/");
 249                 if (page) {
 250                         html_url_arg(page);
 251                         html("/");
 252                         if (path)
 253                                 html_url_arg(path);
 254                 }
 255                 delim = "&amp;";
 256         }
 257         if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
 258                 html(delim);
 259                 html("h=");
 260                 html_url_arg(head);
 261                 delim = "&amp;";
 262         }
 263         return fmt("%s", delim);
 264 }
 265
 266 static void reporevlink(const char *page, const char *name, const char *title,
 267                         const char *class, const char *head, const char *rev,
 268                         const char *path)
 269 {
 270         char *delim;
 271
 272         delim = repolink(title, class, page, head, path);
 273         if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
 274                 html(delim);
 275                 html("id=");
 276                 html_url_arg(rev);
 277         }
 278         html("'>");
 279         html_txt(name);
 280         html("</a>");
 281 }
 282
 283 void cgit_summary_link(const char *name, const char *title, const char *class,
 284                        const char *head)
 285 {
 286         reporevlink(NULL, name, title, class, head, NULL, NULL);
 287 }
 288
 289 void cgit_tag_link(const char *name, const char *title, const char *class,
 290                    const char *tag)
 291 {
 292         reporevlink("tag", name, title, class, tag, NULL, NULL);
 293 }
 294
 295 void cgit_tree_link(const char *name, const char *title, const char *class,
 296                     const char *head, const char *rev, const char *path)
 297 {
 298         reporevlink("tree", name, title, class, head, rev, path);
 299 }
 300
 301 void cgit_plain_link(const char *name, const char *title, const char *class,
 302                      const char *head, const char *rev, const char *path)
 303 {
 304         reporevlink("plain", name, title, class, head, rev, path);
 305 }
 306
 307 void cgit_log_link(const char *name, const char *title, const char *class,
 308                    const char *head, const char *rev, const char *path,
 309                    int ofs, const char *grep, const char *pattern, int showmsg,
 310                    int follow)
 311 {
 312         char *delim;
 313
 314         delim = repolink(title, class, "log", head, path);
 315         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 316                 html(delim);
 317                 html("id=");
 318                 html_url_arg(rev);
 319                 delim = "&amp;";
 320         }
 321         if (grep && pattern) {
 322                 html(delim);
 323                 html("qt=");
 324                 html_url_arg(grep);
 325                 delim = "&amp;";
 326                 html(delim);
 327                 html("q=");
 328                 html_url_arg(pattern);
 329         }
 330         if (ofs > 0) {
 331                 html(delim);
 332                 html("ofs=");
 333                 htmlf("%d", ofs);
 334                 delim = "&amp;";
 335         }
 336         if (showmsg) {
 337                 html(delim);
 338                 html("showmsg=1");
 339                 delim = "&amp;";
 340         }
 341         if (follow) {
 342                 html(delim);
 343                 html("follow=1");
 344         }
 345         html("'>");
 346         html_txt(name);
 347         html("</a>");
 348 }
 349
 350 void cgit_commit_link(char *name, const char *title, const char *class,
 351                       const char *head, const char *rev, const char *path)
 352 {
 353         char *delim;
 354
 355         if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
 356                 name[ctx.cfg.max_msg_len] = '\0';
 357                 name[ctx.cfg.max_msg_len - 1] = '.';
 358                 name[ctx.cfg.max_msg_len - 2] = '.';
 359                 name[ctx.cfg.max_msg_len - 3] = '.';
 360         }
 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                 html_txt(name);
 392         else
 393                 html_txt("(no commit message)");
 394         html("</a>");
 395 }
 396
 397 void cgit_refs_link(const char *name, const char *title, const char *class,
 398                     const char *head, const char *rev, const char *path)
 399 {
 400         reporevlink("refs", name, title, class, head, rev, path);
 401 }
 402
 403 void cgit_snapshot_link(const char *name, const char *title, const char *class,
 404                         const char *head, const char *rev,
 405                         const char *archivename)
 406 {
 407         reporevlink("snapshot", name, title, class, head, rev, archivename);
 408 }
 409
 410 void cgit_diff_link(const char *name, const char *title, const char *class,
 411                     const char *head, const char *new_rev, const char *old_rev,
 412                     const char *path)
 413 {
 414         char *delim;
 415
 416         delim = repolink(title, class, "diff", head, path);
 417         if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
 418                 html(delim);
 419                 html("id=");
 420                 html_url_arg(new_rev);
 421                 delim = "&amp;";
 422         }
 423         if (old_rev) {
 424                 html(delim);
 425                 html("id2=");
 426                 html_url_arg(old_rev);
 427                 delim = "&amp;";
 428         }
 429         if (ctx.qry.difftype) {
 430                 html(delim);
 431                 htmlf("dt=%d", ctx.qry.difftype);
 432                 delim = "&amp;";
 433         }
 434         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 435                 html(delim);
 436                 html("context=");
 437                 htmlf("%d", ctx.qry.context);
 438                 delim = "&amp;";
 439         }
 440         if (ctx.qry.ignorews) {
 441                 html(delim);
 442                 html("ignorews=1");
 443                 delim = "&amp;";
 444         }
 445         if (ctx.qry.follow) {
 446                 html(delim);
 447                 html("follow=1");
 448         }
 449         html("'>");
 450         html_txt(name);
 451         html("</a>");
 452 }
 453
 454 void cgit_patch_link(const char *name, const char *title, const char *class,
 455                      const char *head, const char *rev, const char *path)
 456 {
 457         reporevlink("patch", name, title, class, head, rev, path);
 458 }
 459
 460 void cgit_stats_link(const char *name, const char *title, const char *class,
 461                      const char *head, const char *path)
 462 {
 463         reporevlink("stats", name, title, class, head, NULL, path);
 464 }
 465
 466 static void cgit_self_link(char *name, const char *title, const char *class)
 467 {
 468         if (!strcmp(ctx.qry.page, "repolist"))
 469                 cgit_index_link(name, title, class, ctx.qry.search, ctx.qry.sort,
 470                                 ctx.qry.ofs, 1);
 471         else if (!strcmp(ctx.qry.page, "summary"))
 472                 cgit_summary_link(name, title, class, ctx.qry.head);
 473         else if (!strcmp(ctx.qry.page, "tag"))
 474                 cgit_tag_link(name, title, class, ctx.qry.has_sha1 ?
 475                                ctx.qry.sha1 : ctx.qry.head);
 476         else if (!strcmp(ctx.qry.page, "tree"))
 477                 cgit_tree_link(name, title, class, ctx.qry.head,
 478                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 479                                ctx.qry.path);
 480         else if (!strcmp(ctx.qry.page, "plain"))
 481                 cgit_plain_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, "log"))
 485                 cgit_log_link(name, title, class, ctx.qry.head,
 486                               ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 487                               ctx.qry.path, ctx.qry.ofs,
 488                               ctx.qry.grep, ctx.qry.search,
 489                               ctx.qry.showmsg, ctx.qry.follow);
 490         else if (!strcmp(ctx.qry.page, "commit"))
 491                 cgit_commit_link(name, title, class, ctx.qry.head,
 492                                  ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 493                                  ctx.qry.path);
 494         else if (!strcmp(ctx.qry.page, "patch"))
 495                 cgit_patch_link(name, title, class, ctx.qry.head,
 496                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 497                                 ctx.qry.path);
 498         else if (!strcmp(ctx.qry.page, "refs"))
 499                 cgit_refs_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, "snapshot"))
 503                 cgit_snapshot_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, "diff"))
 507                 cgit_diff_link(name, title, class, ctx.qry.head,
 508                                ctx.qry.sha1, ctx.qry.sha2,
 509                                ctx.qry.path);
 510         else if (!strcmp(ctx.qry.page, "stats"))
 511                 cgit_stats_link(name, title, class, ctx.qry.head,
 512                                 ctx.qry.path);
 513         else {
 514                 /* Don't known how to make link for this page */
 515                 repolink(title, class, ctx.qry.page, ctx.qry.head, ctx.qry.path);
 516                 html("><!-- cgit_self_link() doesn't know how to make link for page '");
 517                 html_txt(ctx.qry.page);
 518                 html("' -->");
 519                 html_txt(name);
 520                 html("</a>");
 521         }
 522 }
 523
 524 void cgit_object_link(struct object *obj)
 525 {
 526         char *page, *shortrev, *fullrev, *name;
 527
 528         fullrev = oid_to_hex(&obj->oid);
 529         shortrev = xstrdup(fullrev);
 530         shortrev[10] = '\0';
 531         if (obj->type == OBJ_COMMIT) {
 532                 cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
 533                                  ctx.qry.head, fullrev, NULL);
 534                 return;
 535         } else if (obj->type == OBJ_TREE)
 536                 page = "tree";
 537         else if (obj->type == OBJ_TAG)
 538                 page = "tag";
 539         else
 540                 page = "blob";
 541         name = fmt("%s %s...", typename(obj->type), shortrev);
 542         reporevlink(page, name, NULL, NULL, ctx.qry.head, fullrev, NULL);
 543 }
 544
 545 static struct string_list_item *lookup_path(struct string_list *list,
 546                                             const char *path)
 547 {
 548         struct string_list_item *item;
 549
 550         while (path && path[0]) {
 551                 if ((item = string_list_lookup(list, path)))
 552                         return item;
 553                 if (!(path = strchr(path, '/')))
 554                         break;
 555                 path++;
 556         }
 557         return NULL;
 558 }
 559
 560 void cgit_submodule_link(const char *class, char *path, const char *rev)
 561 {
 562         struct string_list *list;
 563         struct string_list_item *item;
 564         char tail, *dir;
 565         size_t len;
 566
 567         len = 0;
 568         tail = 0;
 569         list = &ctx.repo->submodules;
 570         item = lookup_path(list, path);
 571         if (!item) {
 572                 len = strlen(path);
 573                 tail = path[len - 1];
 574                 if (tail == '/') {
 575                         path[len - 1] = 0;
 576                         item = lookup_path(list, path);
 577                 }
 578         }
 579         if (item || ctx.repo->module_link) {
 580                 html("<a ");
 581                 if (class)
 582                         htmlf("class='%s' ", class);
 583                 html("href='");
 584                 if (item) {
 585                         html_attrf(item->util, rev);
 586                 } else {
 587                         dir = strrchr(path, '/');
 588                         if (dir)
 589                                 dir++;
 590                         else
 591                                 dir = path;
 592                         html_attrf(ctx.repo->module_link, dir, rev);
 593                 }
 594                 html("'>");
 595                 html_txt(path);
 596                 html("</a>");
 597         } else {
 598                 html("<span");
 599                 if (class)
 600                         htmlf(" class='%s'", class);
 601                 html(">");
 602                 html_txt(path);
 603                 html("</span>");
 604         }
 605         html_txtf(" @ %.7s", rev);
 606         if (item && tail)
 607                 path[len - 1] = tail;
 608 }
 609
 610 const struct date_mode *cgit_date_mode(enum date_mode_type type)
 611 {
 612         static struct date_mode mode;
 613         mode.type = type;
 614         mode.local = ctx.cfg.local_time;
 615         return &mode;
 616 }
 617
 618 static void print_rel_date(time_t t, int tz, double value,
 619         const char *class, const char *suffix)
 620 {
 621         htmlf("<span class='%s' title='", class);
 622         html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 623         htmlf("'>%.0f %s</span>", value, suffix);
 624 }
 625
 626 void cgit_print_age(time_t t, int tz, time_t max_relative)
 627 {
 628         time_t now, secs;
 629
 630         if (!t)
 631                 return;
 632         time(&now);
 633         secs = now - t;
 634         if (secs < 0)
 635                 secs = 0;
 636
 637         if (secs > max_relative && max_relative >= 0) {
 638                 html("<span title='");
 639                 html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 640                 html("'>");
 641                 html_txt(show_date(t, tz, cgit_date_mode(DATE_SHORT)));
 642                 html("</span>");
 643                 return;
 644         }
 645
 646         if (secs < TM_HOUR * 2) {
 647                 print_rel_date(t, tz, secs * 1.0 / TM_MIN, "age-mins", "min.");
 648                 return;
 649         }
 650         if (secs < TM_DAY * 2) {
 651                 print_rel_date(t, tz, secs * 1.0 / TM_HOUR, "age-hours", "hours");
 652                 return;
 653         }
 654         if (secs < TM_WEEK * 2) {
 655                 print_rel_date(t, tz, secs * 1.0 / TM_DAY, "age-days", "days");
 656                 return;
 657         }
 658         if (secs < TM_MONTH * 2) {
 659                 print_rel_date(t, tz, secs * 1.0 / TM_WEEK, "age-weeks", "weeks");
 660                 return;
 661         }
 662         if (secs < TM_YEAR * 2) {
 663                 print_rel_date(t, tz, secs * 1.0 / TM_MONTH, "age-months", "months");
 664                 return;
 665         }
 666         print_rel_date(t, tz, secs * 1.0 / TM_YEAR, "age-years", "years");
 667 }
 668
 669 void cgit_print_http_headers(void)
 670 {
 671         if (ctx.env.no_http && !strcmp(ctx.env.no_http, "1"))
 672                 return;
 673
 674         if (ctx.page.status)
 675                 htmlf("Status: %d %s\n", ctx.page.status, ctx.page.statusmsg);
 676         if (ctx.page.mimetype && ctx.page.charset)
 677                 htmlf("Content-Type: %s; charset=%s\n", ctx.page.mimetype,
 678                       ctx.page.charset);
 679         else if (ctx.page.mimetype)
 680                 htmlf("Content-Type: %s\n", ctx.page.mimetype);
 681         if (ctx.page.size)
 682                 htmlf("Content-Length: %zd\n", ctx.page.size);
 683         if (ctx.page.filename) {
 684                 html("Content-Disposition: inline; filename=\"");
 685                 html_header_arg_in_quotes(ctx.page.filename);
 686                 html("\"\n");
 687         }
 688         if (!ctx.env.authenticated)
 689                 html("Cache-Control: no-cache, no-store\n");
 690         htmlf("Last-Modified: %s\n", http_date(ctx.page.modified));
 691         htmlf("Expires: %s\n", http_date(ctx.page.expires));
 692         if (ctx.page.etag)
 693                 htmlf("ETag: \"%s\"\n", ctx.page.etag);
 694         html("\n");
 695         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 696                 exit(0);
 697 }
 698
 699 void cgit_redirect(const char *url, bool permanent)
 700 {
 701         htmlf("Status: %d %s\n", permanent ? 301 : 302, permanent ? "Moved" : "Found");
 702         html("Location: ");
 703         html_url_path(url);
 704         html("\n\n");
 705 }
 706
 707 static void print_rel_vcs_link(const char *url)
 708 {
 709         html("<link rel='vcs-git' href='");
 710         html_attr(url);
 711         html("' title='");
 712         html_attr(ctx.repo->name);
 713         html(" Git repository'/>\n");
 714 }
 715
 716 void cgit_print_docstart(void)
 717 {
 718         char *host = cgit_hosturl();
 719
 720         if (ctx.cfg.embedded) {
 721                 if (ctx.cfg.header)
 722                         html_include(ctx.cfg.header);
 723                 return;
 724         }
 725
 726         html(cgit_doctype);
 727         html("<html lang='en'>\n");
 728         html("<head>\n");
 729         html("<title>");
 730         html_txt(ctx.page.title);
 731         html("</title>\n");
 732         htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
 733         if (ctx.cfg.robots && *ctx.cfg.robots)
 734                 htmlf("<meta name='robots' content='%s'/>\n", ctx.cfg.robots);
 735         html("<link rel='stylesheet' type='text/css' href='");
 736         html_attr(ctx.cfg.css);
 737         html("'/>\n");
 738         if (ctx.cfg.favicon) {
 739                 html("<link rel='shortcut icon' href='");
 740                 html_attr(ctx.cfg.favicon);
 741                 html("'/>\n");
 742         }
 743         if (host && ctx.repo && ctx.qry.head) {
 744                 char *fileurl;
 745                 struct strbuf sb = STRBUF_INIT;
 746                 strbuf_addf(&sb, "h=%s", ctx.qry.head);
 747
 748                 html("<link rel='alternate' title='Atom feed' href='");
 749                 html(cgit_httpscheme());
 750                 html_attr(host);
 751                 fileurl = cgit_fileurl(ctx.repo->url, "atom", ctx.qry.vpath,
 752                                        sb.buf);
 753                 html_attr(fileurl);
 754                 html("' type='application/atom+xml'/>\n");
 755                 strbuf_release(&sb);
 756                 free(fileurl);
 757         }
 758         if (ctx.repo)
 759                 cgit_add_clone_urls(print_rel_vcs_link);
 760         if (ctx.cfg.head_include)
 761                 html_include(ctx.cfg.head_include);
 762         html("</head>\n");
 763         html("<body>\n");
 764         if (ctx.cfg.header)
 765                 html_include(ctx.cfg.header);
 766         free(host);
 767 }
 768
 769 void cgit_print_docend(void)
 770 {
 771         html("</div> <!-- class=content -->\n");
 772         if (ctx.cfg.embedded) {
 773                 html("</div> <!-- id=cgit -->\n");
 774                 if (ctx.cfg.footer)
 775                         html_include(ctx.cfg.footer);
 776                 return;
 777         }
 778         if (ctx.cfg.footer)
 779                 html_include(ctx.cfg.footer);
 780         else {
 781                 htmlf("<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit %s</a> at ",
 782                         cgit_version);
 783                 html_txt(show_date(time(NULL), 0, cgit_date_mode(DATE_ISO8601)));
 784                 html("</div>\n");
 785         }
 786         html("</div> <!-- id=cgit -->\n");
 787         html("</body>\n</html>\n");
 788 }
 789
 790 void cgit_print_error_page(int code, const char *msg, const char *fmt, ...)
 791 {
 792         va_list ap;
 793         ctx.page.expires = ctx.cfg.cache_dynamic_ttl;
 794         ctx.page.status = code;
 795         ctx.page.statusmsg = msg;
 796         cgit_print_layout_start();
 797         va_start(ap, fmt);
 798         cgit_vprint_error(fmt, ap);
 799         va_end(ap);
 800         cgit_print_layout_end();
 801 }
 802
 803 void cgit_print_layout_start(void)
 804 {
 805         cgit_print_http_headers();
 806         cgit_print_docstart();
 807         cgit_print_pageheader();
 808 }
 809
 810 void cgit_print_layout_end(void)
 811 {
 812         cgit_print_docend();
 813 }
 814
 815 static void add_clone_urls(void (*fn)(const char *), char *txt, char *suffix)
 816 {
 817         struct strbuf **url_list = strbuf_split_str(txt, ' ', 0);
 818         int i;
 819
 820         for (i = 0; url_list[i]; i++) {
 821                 strbuf_rtrim(url_list[i]);
 822                 if (url_list[i]->len == 0)
 823                         continue;
 824                 if (suffix && *suffix)
 825                         strbuf_addf(url_list[i], "/%s", suffix);
 826                 fn(url_list[i]->buf);
 827         }
 828
 829         strbuf_list_free(url_list);
 830 }
 831
 832 void cgit_add_clone_urls(void (*fn)(const char *))
 833 {
 834         if (ctx.repo->clone_url)
 835                 add_clone_urls(fn, expand_macros(ctx.repo->clone_url), NULL);
 836         else if (ctx.cfg.clone_prefix)
 837                 add_clone_urls(fn, ctx.cfg.clone_prefix, ctx.repo->url);
 838 }
 839
 840 static int print_branch_option(const char *refname, const struct object_id *oid,
 841                                int flags, void *cb_data)
 842 {
 843         char *name = (char *)refname;
 844         html_option(name, name, ctx.qry.head);
 845         return 0;
 846 }
 847
 848 void cgit_add_hidden_formfields(int incl_head, int incl_search,
 849                                 const char *page)
 850 {
 851         if (!ctx.cfg.virtual_root) {
 852                 struct strbuf url = STRBUF_INIT;
 853
 854                 strbuf_addf(&url, "%s/%s", ctx.qry.repo, page);
 855                 if (ctx.qry.vpath)
 856                         strbuf_addf(&url, "/%s", ctx.qry.vpath);
 857                 html_hidden("url", url.buf);
 858                 strbuf_release(&url);
 859         }
 860
 861         if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
 862             strcmp(ctx.qry.head, ctx.repo->defbranch))
 863                 html_hidden("h", ctx.qry.head);
 864
 865         if (ctx.qry.sha1)
 866                 html_hidden("id", ctx.qry.sha1);
 867         if (ctx.qry.sha2)
 868                 html_hidden("id2", ctx.qry.sha2);
 869         if (ctx.qry.showmsg)
 870                 html_hidden("showmsg", "1");
 871
 872         if (incl_search) {
 873                 if (ctx.qry.grep)
 874                         html_hidden("qt", ctx.qry.grep);
 875                 if (ctx.qry.search)
 876                         html_hidden("q", ctx.qry.search);
 877         }
 878 }
 879
 880 static const char *hc(const char *page)
 881 {
 882         if (!ctx.qry.page)
 883                 return NULL;
 884
 885         return strcmp(ctx.qry.page, page) ? NULL : "active";
 886 }
 887
 888 static void cgit_print_path_crumbs(char *path)
 889 {
 890         char *old_path = ctx.qry.path;
 891         char *p = path, *q, *end = path + strlen(path);
 892
 893         ctx.qry.path = NULL;
 894         cgit_self_link("root", NULL, NULL);
 895         ctx.qry.path = p = path;
 896         while (p < end) {
 897                 if (!(q = strchr(p, '/')))
 898                         q = end;
 899                 *q = '\0';
 900                 html_txt("/");
 901                 cgit_self_link(p, NULL, NULL);
 902                 if (q < end)
 903                         *q = '/';
 904                 p = q + 1;
 905         }
 906         ctx.qry.path = old_path;
 907 }
 908
 909 static void print_header(void)
 910 {
 911         char *logo = NULL, *logo_link = NULL;
 912
 913         html("<table id='header'>\n");
 914         html("<tr>\n");
 915
 916         if (ctx.repo && ctx.repo->logo && *ctx.repo->logo)
 917                 logo = ctx.repo->logo;
 918         else
 919                 logo = ctx.cfg.logo;
 920         if (ctx.repo && ctx.repo->logo_link && *ctx.repo->logo_link)
 921                 logo_link = ctx.repo->logo_link;
 922         else
 923                 logo_link = ctx.cfg.logo_link;
 924         if (logo && *logo) {
 925                 html("<td class='logo' rowspan='2'><a href='");
 926                 if (logo_link && *logo_link)
 927                         html_attr(logo_link);
 928                 else
 929                         html_attr(cgit_rooturl());
 930                 html("'><img src='");
 931                 html_attr(logo);
 932                 html("' alt='cgit logo'/></a></td>\n");
 933         }
 934
 935         html("<td class='main'>");
 936         if (ctx.repo) {
 937                 cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
 938                 html(" : ");
 939                 cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
 940                 if (ctx.env.authenticated) {
 941                         html("</td><td class='form'>");
 942                         html("<form method='get'>\n");
 943                         cgit_add_hidden_formfields(0, 1, ctx.qry.page);
 944                         html("<select name='h' onchange='this.form.submit();'>\n");
 945                         for_each_branch_ref(print_branch_option, ctx.qry.head);
 946                         if (ctx.repo->enable_remote_branches)
 947                                 for_each_remote_ref(print_branch_option, ctx.qry.head);
 948                         html("</select> ");
 949                         html("<input type='submit' value='switch'/>");
 950                         html("</form>");
 951                 }
 952         } else
 953                 html_txt(ctx.cfg.root_title);
 954         html("</td></tr>\n");
 955
 956         html("<tr><td class='sub'>");
 957         if (ctx.repo) {
 958                 html_txt(ctx.repo->desc);
 959                 html("</td><td class='sub right'>");
 960                 html_txt(ctx.repo->owner);
 961         } else {
 962                 if (ctx.cfg.root_desc)
 963                         html_txt(ctx.cfg.root_desc);
 964                 else if (ctx.cfg.index_info)
 965                         html_include(ctx.cfg.index_info);
 966         }
 967         html("</td></tr></table>\n");
 968 }
 969
 970 void cgit_print_pageheader(void)
 971 {
 972         html("<div id='cgit'>");
 973         if (!ctx.env.authenticated || !ctx.cfg.noheader)
 974                 print_header();
 975
 976         html("<table class='tabs'><tr><td>\n");
 977         if (ctx.env.authenticated && ctx.repo) {
 978                 if (ctx.repo->readme.nr)
 979                         reporevlink("about", "about", NULL,
 980                                     hc("about"), ctx.qry.head, NULL,
 981                                     NULL);
 982                 cgit_summary_link("summary", NULL, hc("summary"),
 983                                   ctx.qry.head);
 984                 cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
 985                                ctx.qry.sha1, NULL);
 986                 cgit_log_link("log", NULL, hc("log"), ctx.qry.head,
 987                               NULL, ctx.qry.vpath, 0, NULL, NULL,
 988                               ctx.qry.showmsg, ctx.qry.follow);
 989                 cgit_tree_link("tree", NULL, hc("tree"), ctx.qry.head,
 990                                ctx.qry.sha1, ctx.qry.vpath);
 991                 cgit_commit_link("commit", NULL, hc("commit"),
 992                                  ctx.qry.head, ctx.qry.sha1, ctx.qry.vpath);
 993                 cgit_diff_link("diff", NULL, hc("diff"), ctx.qry.head,
 994                                ctx.qry.sha1, ctx.qry.sha2, ctx.qry.vpath);
 995                 if (ctx.repo->max_stats)
 996                         cgit_stats_link("stats", NULL, hc("stats"),
 997                                         ctx.qry.head, ctx.qry.vpath);
 998                 if (ctx.repo->homepage) {
 999                         html("<a href='");
1000                         html_attr(ctx.repo->homepage);
1001                         html("'>homepage</a>");
1002                 }
1003                 html("</td><td class='form'>");
1004                 html("<form class='right' method='get' action='");
1005                 if (ctx.cfg.virtual_root) {
1006                         char *fileurl = cgit_fileurl(ctx.qry.repo, "log",
1007                                                    ctx.qry.vpath, NULL);
1008                         html_url_path(fileurl);
1009                         free(fileurl);
1010                 }
1011                 html("'>\n");
1012                 cgit_add_hidden_formfields(1, 0, "log");
1013                 html("<select name='qt'>\n");
1014                 html_option("grep", "log msg", ctx.qry.grep);
1015                 html_option("author", "author", ctx.qry.grep);
1016                 html_option("committer", "committer", ctx.qry.grep);
1017                 html_option("range", "range", ctx.qry.grep);
1018                 html("</select>\n");
1019                 html("<input class='txt' type='text' size='10' name='q' value='");
1020                 html_attr(ctx.qry.search);
1021                 html("'/>\n");
1022                 html("<input type='submit' value='search'/>\n");
1023                 html("</form>\n");
1024         } else if (ctx.env.authenticated) {
1025                 char *currenturl = cgit_currenturl();
1026                 site_link(NULL, "index", NULL, hc("repolist"), NULL, NULL, 0, 1);
1027                 if (ctx.cfg.root_readme)
1028                         site_link("about", "about", NULL, hc("about"),
1029                                   NULL, NULL, 0, 1);
1030                 html("</td><td class='form'>");
1031                 html("<form method='get' action='");
1032                 html_attr(currenturl);
1033                 html("'>\n");
1034                 html("<input type='text' name='q' size='10' value='");
1035                 html_attr(ctx.qry.search);
1036                 html("'/>\n");
1037                 html("<input type='submit' value='search'/>\n");
1038                 html("</form>");
1039                 free(currenturl);
1040         }
1041         html("</td></tr></table>\n");
1042         if (ctx.env.authenticated && ctx.qry.vpath) {
1043                 html("<div class='path'>");
1044                 html("path: ");
1045                 cgit_print_path_crumbs(ctx.qry.vpath);
1046                 if (ctx.cfg.enable_follow_links && !strcmp(ctx.qry.page, "log")) {
1047                         html(" (");
1048                         ctx.qry.follow = !ctx.qry.follow;
1049                         cgit_self_link(ctx.qry.follow ? "follow" : "unfollow",
1050                                         NULL, NULL);
1051                         ctx.qry.follow = !ctx.qry.follow;
1052                         html(")");
1053                 }
1054                 html("</div>");
1055         }
1056         html("<div class='content'>");
1057 }
1058
1059 void cgit_print_filemode(unsigned short mode)
1060 {
1061         if (S_ISDIR(mode))
1062                 html("d");
1063         else if (S_ISLNK(mode))
1064                 html("l");
1065         else if (S_ISGITLINK(mode))
1066                 html("m");
1067         else
1068                 html("-");
1069         html_fileperm(mode >> 6);
1070         html_fileperm(mode >> 3);
1071         html_fileperm(mode);
1072 }
1073
1074 void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
1075                                   const char *ref)
1076 {
1077         unsigned char sha1[20];
1078
1079         /*
1080          * Prettify snapshot names by stripping leading "v" or "V" if the tag
1081          * name starts with {v,V}[0-9] and the prettify mapping is injective,
1082          * i.e. each stripped tag can be inverted without ambiguities.
1083          */
1084         if (get_sha1(fmt("refs/tags/%s", ref), sha1) == 0 &&
1085             (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
1086             ((get_sha1(fmt("refs/tags/%s", ref + 1), sha1) == 0) +
1087              (get_sha1(fmt("refs/tags/v%s", ref + 1), sha1) == 0) +
1088              (get_sha1(fmt("refs/tags/V%s", ref + 1), sha1) == 0) == 1))
1089                 ref++;
1090
1091         strbuf_addf(filename, "%s-%s", base, ref);
1092 }
1093
1094 void cgit_print_snapshot_links(const char *repo, const char *head,
1095                                const char *hex, int snapshots)
1096 {
1097         const struct cgit_snapshot_format* f;
1098         struct strbuf filename = STRBUF_INIT;
1099         size_t prefixlen;
1100
1101         cgit_compose_snapshot_prefix(&filename, cgit_repobasename(repo), hex);
1102         prefixlen = filename.len;
1103         for (f = cgit_snapshot_formats; f->suffix; f++) {
1104                 if (!(snapshots & f->bit))
1105                         continue;
1106                 strbuf_setlen(&filename, prefixlen);
1107                 strbuf_addstr(&filename, f->suffix);
1108                 cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL,
1109                                    filename.buf);
1110                 html("<br/>");
1111         }
1112         strbuf_release(&filename);
1113 }