cmd-headers.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Header display, search, etc., related user commands.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2018 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   6  */
   7 /*
   8  * Copyright (c) 1980, 1993
   9  *      The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35 #undef n_FILE
  36 #define n_FILE cmd_headers
  37
  38 #ifndef HAVE_AMALGAMATION
  39 # include "nail.h"
  40 #endif
  41
  42 static int        _screen;
  43
  44 /* Print out the header of a specific message.
  45  * time_current must be up-to-date when this is called.
  46  * a_cmd__hprf: handle *headline*
  47  * a_cmd__subject: -1 if Subject: yet seen, otherwise n_alloc()d Subject:
  48  * a_cmd__putindent: print out the indenting in threaded display
  49  * a_cmd__putuc: print out a Unicode character or a substitute for it, return
  50  *    0 on error or wcwidth() (or 1) on success */
  51 static void a_cmd_print_head(size_t yetprinted, size_t msgno, FILE *f,
  52                   bool_t threaded, bool_t subject_thread_compress);
  53
  54 static void a_cmd__hprf(size_t yetprinted, char const *fmt, size_t msgno,
  55                FILE *f, bool_t threaded, bool_t subject_thread_compress,
  56                char const *attrlist);
  57 static char *a_cmd__subject(struct message *mp, bool_t threaded,
  58                bool_t subject_thread_compress, size_t yetprinted);
  59 static int a_cmd__putindent(FILE *fp, struct message *mp, int maxwidth);
  60 static size_t a_cmd__putuc(int u, int c, FILE *fp);
  61 static int a_cmd__dispc(struct message *mp, char const *a);
  62
  63 /* Shared `z' implementation */
  64 static int a_cmd_scroll(char const *arg, bool_t onlynew);
  65
  66 /* Shared `headers' implementation */
  67 static int     _headers(int msgspec);
  68
  69 static void
  70 a_cmd_print_head(size_t yetprinted, size_t msgno, FILE *f, bool_t threaded,
  71       bool_t subject_thread_compress){
  72    enum {attrlen = 14};
  73    char attrlist[attrlen +1], *cp;
  74    char const *fmt;
  75    NYD2_ENTER;
  76
  77    if((cp = ok_vlook(attrlist)) != NULL){
  78       if(strlen(cp) == attrlen){
  79          memcpy(attrlist, cp, attrlen +1);
  80          goto jattrok;
  81       }
  82       n_err(_("*attrlist* is not of the correct length, using built-in\n"));
  83    }
  84
  85    if(ok_blook(bsdcompat) || ok_blook(bsdflags)){
  86       char const bsdattr[attrlen +1] = "NU  *HMFAT+-$~";
  87
  88       memcpy(attrlist, bsdattr, sizeof bsdattr);
  89    }else if(ok_blook(SYSV3)){
  90       char const bsdattr[attrlen +1] = "NU  *HMFAT+-$~";
  91
  92       memcpy(attrlist, bsdattr, sizeof bsdattr);
  93       n_OBSOLETE(_("*SYSV3*: please use *bsdcompat* or *bsdflags*, "
  94          "or set *attrlist*"));
  95    }else{
  96       char const pattr[attrlen +1]   = "NUROSPMFAT+-$~";
  97
  98       memcpy(attrlist, pattr, sizeof pattr);
  99    }
 100
 101 jattrok:
 102    if((fmt = ok_vlook(headline)) == NULL){
 103       fmt = ((ok_blook(bsdcompat) || ok_blook(bsdheadline))
 104             ? "%>%a%m %-20f  %16d %4l/%-5o %i%-S"
 105             : "%>%a%m %-18f %-16d %4l/%-5o %i%-s");
 106    }
 107
 108    a_cmd__hprf(yetprinted, fmt, msgno, f, threaded, subject_thread_compress,
 109       attrlist);
 110    NYD2_LEAVE;
 111 }
 112
 113 static void
 114 a_cmd__hprf(size_t yetprinted, char const *fmt, size_t msgno, FILE *f,
 115    bool_t threaded, bool_t subject_thread_compress, char const *attrlist)
 116 {
 117    char buf[16], cbuf[8], *cp, *subjline;
 118    char const *date, *name, *fp, *color_tag;
 119    int i, n, s, wleft, subjlen;
 120    struct message *mp;
 121    n_COLOUR( struct n_colour_pen *cpen_new COMMA *cpen_cur COMMA *cpen_bas; )
 122    enum {
 123       _NONE       = 0,
 124       _ISDOT      = 1<<0,
 125       _ISTO       = 1<<1,
 126       _IFMT       = 1<<2,
 127       _LOOP_MASK  = (1<<4) - 1,
 128       _SFMT       = 1<<4,        /* It is 'S' */
 129       /* For the simple byte-based counts in wleft and n we sometimes need
 130        * adjustments to compensate for additional bytes of UTF-8 sequences */
 131       _PUTCB_UTF8_SHIFT = 5,
 132       _PUTCB_UTF8_MASK = 3<<5
 133    } flags = _NONE;
 134    NYD2_ENTER;
 135    n_UNUSED(buf);
 136
 137    if ((mp = message + msgno - 1) == dot)
 138       flags = _ISDOT;
 139
 140    color_tag = NULL;
 141    date = n_header_textual_date_info(mp, &color_tag);
 142    /* C99 */{
 143       bool_t isto;
 144
 145       n_header_textual_sender_info(mp, &cp, NULL, NULL, NULL, &isto);
 146       name = cp;
 147       if(isto)
 148          flags |= _ISTO;
 149    }
 150
 151    subjline = NULL;
 152
 153    /* Detect the width of the non-format characters in *headline*;
 154     * like that we can simply use putc() in the next loop, since we have
 155     * already calculated their column widths (TODO it's sick) */
 156    wleft = subjlen = n_scrnwidth;
 157
 158    for (fp = fmt; *fp != '\0'; ++fp) {
 159       if (*fp == '%') {
 160          if (*++fp == '-')
 161             ++fp;
 162          else if (*fp == '+')
 163             ++fp;
 164          if (digitchar(*fp)) {
 165             n = 0;
 166             do
 167                n = 10*n + *fp - '0';
 168             while (++fp, digitchar(*fp));
 169             subjlen -= n;
 170          }
 171          if (*fp == 'i')
 172             flags |= _IFMT;
 173
 174          if (*fp == '\0')
 175             break;
 176       } else {
 177 #ifdef HAVE_WCWIDTH
 178          if (n_mb_cur_max > 1) {
 179             wchar_t  wc;
 180             if ((s = mbtowc(&wc, fp, n_mb_cur_max)) == -1)
 181                n = s = 1;
 182             else if ((n = wcwidth(wc)) == -1)
 183                n = 1;
 184          } else
 185 #endif
 186             n = s = 1;
 187          subjlen -= n;
 188          wleft -= n;
 189          while (--s > 0)
 190             ++fp;
 191       }
 192    }
 193
 194    /* Walk *headline*, producing output TODO not (really) MB safe */
 195 #ifdef HAVE_COLOUR
 196    if(n_COLOUR_IS_ACTIVE()){
 197       if(flags & _ISDOT)
 198          color_tag = n_COLOUR_TAG_SUM_DOT;
 199       cpen_bas = n_colour_pen_create(n_COLOUR_ID_SUM_HEADER, color_tag);
 200       n_colour_pen_put(cpen_new = cpen_cur = cpen_bas);
 201    }else
 202       cpen_new = cpen_bas = cpen_cur = NULL;
 203 #endif
 204
 205    for (fp = fmt; *fp != '\0'; ++fp) {
 206       char c;
 207
 208       if ((c = *fp & 0xFF) != '%') {
 209          n_COLOUR(
 210             if(n_COLOUR_IS_ACTIVE() && (cpen_new = cpen_bas) != cpen_cur)
 211                n_colour_pen_put(cpen_cur = cpen_new);
 212          );
 213          putc(c, f);
 214          continue;
 215       }
 216
 217       flags &= _LOOP_MASK;
 218       n = 0;
 219       s = 1;
 220       if ((c = *++fp) == '-') {
 221          s = -1;
 222          ++fp;
 223       } else if (c == '+')
 224          ++fp;
 225       if (digitchar(*fp)) {
 226          do
 227             n = 10*n + *fp - '0';
 228          while (++fp, digitchar(*fp));
 229       }
 230
 231       if ((c = *fp & 0xFF) == '\0')
 232          break;
 233       n *= s;
 234
 235       cbuf[1] = '\0';
 236       switch (c) {
 237       case '%':
 238          goto jputcb;
 239       case '>':
 240       case '<':
 241          if (flags & _ISDOT) {
 242             n_COLOUR(
 243                if(n_COLOUR_IS_ACTIVE())
 244                   cpen_new = n_colour_pen_create(n_COLOUR_ID_SUM_DOTMARK,
 245                         color_tag);
 246             );
 247             if((n_psonce & n_PSO_UNICODE) && !ok_blook(headline_plain)){
 248                if (c == '>')
 249                   /* 25B8;BLACK RIGHT-POINTING SMALL TRIANGLE */
 250                   cbuf[1] = (char)0x96, cbuf[2] = (char)0xB8;
 251                else
 252                   /* 25C2;BLACK LEFT-POINTING SMALL TRIANGLE */
 253                   cbuf[1] = (char)0x97, cbuf[2] = (char)0x82;
 254                c = (char)0xE2;
 255                cbuf[3] = '\0';
 256                flags |= 2 << _PUTCB_UTF8_SHIFT;
 257             }
 258          } else
 259             c = ' ';
 260          goto jputcb;
 261       case '$':
 262 #ifdef HAVE_SPAM
 263          if (n == 0)
 264             n = 5;
 265          if (UICMP(32, n_ABS(n), >, wleft))
 266             n = (n < 0) ? -wleft : wleft;
 267          snprintf(buf, sizeof buf, "%u.%02u",
 268             (mp->m_spamscore >> 8), (mp->m_spamscore & 0xFF));
 269          n = fprintf(f, "%*s", n, buf);
 270          wleft = (n >= 0) ? wleft - n : 0;
 271          break;
 272 #else
 273          c = '?';
 274          goto jputcb;
 275 #endif
 276       case 'a':
 277          c = a_cmd__dispc(mp, attrlist);
 278 jputcb:
 279 #ifdef HAVE_COLOUR
 280          if(n_COLOUR_IS_ACTIVE()){
 281             if(cpen_new == cpen_cur)
 282                cpen_new = cpen_bas;
 283             if(cpen_new != cpen_cur)
 284                n_colour_pen_put(cpen_cur = cpen_new);
 285          }
 286 #endif
 287          if (UICMP(32, n_ABS(n), >, wleft))
 288             n = (n < 0) ? -wleft : wleft;
 289          cbuf[0] = c;
 290          n = fprintf(f, "%*s", n, cbuf);
 291          if (n >= 0) {
 292             wleft -= n;
 293             if ((n = (flags & _PUTCB_UTF8_MASK)) != 0) {
 294                n >>= _PUTCB_UTF8_SHIFT;
 295                wleft += n;
 296             }
 297          } else {
 298             wleft = 0; /* TODO I/O error.. ? break? */
 299          }
 300 #ifdef HAVE_COLOUR
 301          if(n_COLOUR_IS_ACTIVE() && (cpen_new = cpen_bas) != cpen_cur)
 302             n_colour_pen_put(cpen_cur = cpen_new);
 303 #endif
 304          break;
 305       case 'd':
 306          if (n == 0)
 307             n = 16;
 308          if (UICMP(32, n_ABS(n), >, wleft))
 309             n = (n < 0) ? -wleft : wleft;
 310          n = fprintf(f, "%*.*s", n, n_ABS(n), date);
 311          wleft = (n >= 0) ? wleft - n : 0;
 312          break;
 313       case 'e':
 314          if (n == 0)
 315             n = 2;
 316          if (UICMP(32, n_ABS(n), >, wleft))
 317             n = (n < 0) ? -wleft : wleft;
 318          n = fprintf(f, "%*u", n, (threaded == 1 ? mp->m_level : 0));
 319          wleft = (n >= 0) ? wleft - n : 0;
 320          break;
 321       case 'f':
 322          if (n == 0) {
 323             n = 18;
 324             if (s < 0)
 325                n = -n;
 326          }
 327          i = n_ABS(n);
 328          if (i > wleft) {
 329             i = wleft;
 330             n = (n < 0) ? -wleft : wleft;
 331          }
 332          if (flags & _ISTO) /* XXX tr()! */
 333             i -= 3;
 334          n = fprintf(f, "%s%s", ((flags & _ISTO) ? "To " : n_empty),
 335                colalign(name, i, n, &wleft));
 336          if (n < 0)
 337             wleft = 0;
 338          else if (flags & _ISTO)
 339             wleft -= 3;
 340          break;
 341       case 'i':
 342          if (threaded) {
 343 #ifdef HAVE_COLOUR
 344             if(n_COLOUR_IS_ACTIVE()){
 345                cpen_new = n_colour_pen_create(n_COLOUR_ID_SUM_THREAD,
 346                      color_tag);
 347                if(cpen_new != cpen_cur)
 348                   n_colour_pen_put(cpen_cur = cpen_new);
 349             }
 350 #endif
 351             n = a_cmd__putindent(f, mp, n_MIN(wleft, (int)n_scrnwidth - 60));
 352             wleft = (n >= 0) ? wleft - n : 0;
 353 #ifdef HAVE_COLOUR
 354             if(n_COLOUR_IS_ACTIVE() && (cpen_new = cpen_bas) != cpen_cur)
 355                n_colour_pen_put(cpen_cur = cpen_new);
 356 #endif
 357          }
 358          break;
 359       case 'l':
 360          if (n == 0)
 361             n = 4;
 362          if (UICMP(32, n_ABS(n), >, wleft))
 363             n = (n < 0) ? -wleft : wleft;
 364          if (mp->m_xlines) {
 365             n = fprintf(f, "%*ld", n, mp->m_xlines);
 366             wleft = (n >= 0) ? wleft - n : 0;
 367          } else {
 368             n = n_ABS(n);
 369             wleft -= n;
 370             while (n-- != 0)
 371                putc(' ', f);
 372          }
 373          break;
 374       case 'm':
 375          if (n == 0) {
 376             n = 3;
 377             if (threaded)
 378                for (i = msgCount; i > 999; i /= 10)
 379                   ++n;
 380          }
 381          if (UICMP(32, n_ABS(n), >, wleft))
 382             n = (n < 0) ? -wleft : wleft;
 383          n = fprintf(f, "%*lu", n, (ul_i)msgno);
 384          wleft = (n >= 0) ? wleft - n : 0;
 385          break;
 386       case 'o':
 387          if (n == 0)
 388             n = -5;
 389          if (UICMP(32, n_ABS(n), >, wleft))
 390             n = (n < 0) ? -wleft : wleft;
 391          n = fprintf(f, "%*lu", n, (ul_i)mp->m_xsize);
 392          wleft = (n >= 0) ? wleft - n : 0;
 393          break;
 394       case 'S':
 395          flags |= _SFMT;
 396          /*FALLTHRU*/
 397       case 's':
 398          if (n == 0)
 399             n = subjlen - 2;
 400          if (n > 0 && s < 0)
 401             n = -n;
 402          if (subjlen > wleft)
 403             subjlen = wleft;
 404          if (UICMP(32, n_ABS(n), >, subjlen))
 405             n = (n < 0) ? -subjlen : subjlen;
 406          if (flags & _SFMT)
 407             n -= (n < 0) ? -2 : 2;
 408          if (n == 0)
 409             break;
 410          if (subjline == NULL)
 411             subjline = a_cmd__subject(mp, (threaded && (flags & _IFMT)),
 412                   subject_thread_compress, yetprinted);
 413          if (subjline == (char*)-1) {
 414             n = fprintf(f, "%*s", n, n_empty);
 415             wleft = (n >= 0) ? wleft - n : 0;
 416          } else {
 417             n = fprintf(f, ((flags & _SFMT) ? "\"%s\"" : "%s"),
 418                   colalign(subjline, n_ABS(n), n, &wleft));
 419             if (n < 0)
 420                wleft = 0;
 421          }
 422          break;
 423       case 'T': /* Message recipient flags */
 424          switch(is_mlist_mp(mp, MLIST_OTHER)){
 425          case MLIST_OTHER: c = ' '; break;
 426          case MLIST_KNOWN: c = 'l'; break;
 427          case MLIST_SUBSCRIBED: c = 'L'; break;
 428          }
 429          goto jputcb;
 430       case 't':
 431          if (n == 0) {
 432             n = 3;
 433             if (threaded)
 434                for (i = msgCount; i > 999; i /= 10)
 435                   ++n;
 436          }
 437          if (UICMP(32, n_ABS(n), >, wleft))
 438             n = (n < 0) ? -wleft : wleft;
 439          n = fprintf(f, "%*lu",
 440                n, (threaded ? (ul_i)mp->m_threadpos : (ul_i)msgno));
 441          wleft = (n >= 0) ? wleft - n : 0;
 442          break;
 443       case 'U':
 444 #ifdef HAVE_IMAP
 445             if (n == 0)
 446                n = 9;
 447             if (UICMP(32, n_ABS(n), >, wleft))
 448                n = (n < 0) ? -wleft : wleft;
 449             n = fprintf(f, "%*" PRIu64 , n, mp->m_uid);
 450             wleft = (n >= 0) ? wleft - n : 0;
 451             break;
 452 #else
 453             c = '0';
 454             goto jputcb;
 455 #endif
 456       default:
 457          if (n_poption & n_PO_D_V)
 458             n_err(_("Unknown *headline* format: %%%c\n"), c);
 459          c = '?';
 460          goto jputcb;
 461       }
 462
 463       if (wleft <= 0)
 464          break;
 465    }
 466
 467    n_COLOUR( n_colour_reset(); )
 468    putc('\n', f);
 469
 470    if (subjline != NULL && subjline != (char*)-1)
 471       n_free(subjline);
 472    NYD2_LEAVE;
 473 }
 474
 475 static char *
 476 a_cmd__subject(struct message *mp, bool_t threaded,
 477    bool_t subject_thread_compress, size_t yetprinted)
 478 {
 479    struct str in, out;
 480    char *rv, *ms;
 481    NYD2_ENTER;
 482
 483    rv = (char*)-1;
 484
 485    if ((ms = hfield1("subject", mp)) == NULL)
 486       goto jleave;
 487
 488    in.l = strlen(in.s = ms);
 489    mime_fromhdr(&in, &out, TD_ICONV | TD_ISPR);
 490    rv = ms = out.s;
 491
 492    if (!threaded || !subject_thread_compress || mp->m_level == 0)
 493       goto jleave;
 494
 495    /* In a display thread - check whether this message uses the same
 496     * Subject: as it's parent or elder neighbour, suppress printing it if
 497     * this is the case.  To extend this a bit, ignore any leading Re: or
 498     * Fwd: plus follow-up WS.  Ignore invisible messages along the way */
 499    ms = n_UNCONST(subject_re_trim(n_UNCONST(ms)));
 500
 501    for (; (mp = prev_in_thread(mp)) != NULL && yetprinted-- > 0;) {
 502       char *os;
 503
 504       if (visible(mp) && (os = hfield1("subject", mp)) != NULL) {
 505          struct str oout;
 506          int x;
 507
 508          in.l = strlen(in.s = os);
 509          mime_fromhdr(&in, &oout, TD_ICONV | TD_ISPR);
 510          x = asccasecmp(ms, subject_re_trim(oout.s));
 511          n_free(oout.s);
 512
 513          if (!x) {
 514             n_free(out.s);
 515             rv = (char*)-1;
 516          }
 517          break;
 518       }
 519    }
 520 jleave:
 521    NYD2_LEAVE;
 522    return rv;
 523 }
 524
 525 static int
 526 a_cmd__putindent(FILE *fp, struct message *mp, int maxwidth)/* XXX magics */
 527 {
 528    struct message *mq;
 529    int *us, indlvl, indw, i, important = MNEW | MFLAGGED;
 530    char *cs;
 531    NYD2_ENTER;
 532
 533    if (mp->m_level == 0 || maxwidth == 0) {
 534       indw = 0;
 535       goto jleave;
 536    }
 537
 538    cs = n_lofi_alloc(mp->m_level);
 539    us = n_lofi_alloc(mp->m_level * sizeof *us);
 540
 541    i = mp->m_level - 1;
 542    if (mp->m_younger && UICMP(32, i + 1, ==, mp->m_younger->m_level)) {
 543       if (mp->m_parent && mp->m_parent->m_flag & important)
 544          us[i] = mp->m_flag & important ? 0x2523 : 0x2520;
 545       else
 546          us[i] = mp->m_flag & important ? 0x251D : 0x251C;
 547       cs[i] = '+';
 548    } else {
 549       if (mp->m_parent && mp->m_parent->m_flag & important)
 550          us[i] = mp->m_flag & important ? 0x2517 : 0x2516;
 551       else
 552          us[i] = mp->m_flag & important ? 0x2515 : 0x2514;
 553       cs[i] = '\\';
 554    }
 555
 556    mq = mp->m_parent;
 557    for (i = mp->m_level - 2; i >= 0; --i) {
 558       if (mq) {
 559          if (UICMP(32, i, >, mq->m_level - 1)) {
 560             us[i] = cs[i] = ' ';
 561             continue;
 562          }
 563          if (mq->m_younger) {
 564             if (mq->m_parent && (mq->m_parent->m_flag & important))
 565                us[i] = 0x2503;
 566             else
 567                us[i] = 0x2502;
 568             cs[i] = '|';
 569          } else
 570             us[i] = cs[i] = ' ';
 571          mq = mq->m_parent;
 572       } else
 573          us[i] = cs[i] = ' ';
 574    }
 575
 576    --maxwidth;
 577    for (indlvl = indw = 0; (ui8_t)indlvl < mp->m_level && indw < maxwidth;
 578          ++indlvl) {
 579       if (indw < maxwidth - 1)
 580          indw += (int)a_cmd__putuc(us[indlvl], cs[indlvl] & 0xFF, fp);
 581       else
 582          indw += (int)a_cmd__putuc(0x21B8, '^', fp);
 583    }
 584    indw += a_cmd__putuc(0x25B8, '>', fp);
 585
 586    n_lofi_free(us);
 587    n_lofi_free(cs);
 588 jleave:
 589    NYD2_LEAVE;
 590    return indw;
 591 }
 592
 593 static size_t
 594 a_cmd__putuc(int u, int c, FILE *fp){
 595    size_t rv;
 596    NYD2_ENTER;
 597    n_UNUSED(u);
 598
 599 #ifdef HAVE_NATCH_CHAR
 600    if((n_psonce & n_PSO_UNICODE) && (u & ~(wchar_t)0177) &&
 601          !ok_blook(headline_plain)){
 602       char mbb[MB_LEN_MAX];
 603       int i, n;
 604
 605       if((n = wctomb(mbb, u)) > 0){
 606          rv = wcwidth(u);
 607          for(i = 0; i < n; ++i)
 608             if(putc(mbb[i] & 0377, fp) == EOF){
 609                rv = 0;
 610                break;
 611             }
 612       }else if(n == 0)
 613          rv = (putc('\0', fp) != EOF);
 614       else
 615          rv = 0;
 616    }else
 617 #endif
 618       rv = (putc(c, fp) != EOF);
 619    NYD2_LEAVE;
 620    return rv;
 621 }
 622
 623 static int
 624 a_cmd__dispc(struct message *mp, char const *a)
 625 {
 626    int i = ' ';
 627    NYD2_ENTER;
 628
 629    if ((mp->m_flag & (MREAD | MNEW)) == MREAD)
 630       i = a[3];
 631    if ((mp->m_flag & (MREAD | MNEW)) == (MREAD | MNEW))
 632       i = a[2];
 633    if (mp->m_flag & MANSWERED)
 634       i = a[8];
 635    if (mp->m_flag & MDRAFTED)
 636       i = a[9];
 637    if ((mp->m_flag & (MREAD | MNEW)) == MNEW)
 638       i = a[0];
 639    if (!(mp->m_flag & (MREAD | MNEW)))
 640       i = a[1];
 641    if (mp->m_flag & MSPAM)
 642       i = a[12];
 643    if (mp->m_flag & MSPAMUNSURE)
 644       i = a[13];
 645    if (mp->m_flag & MSAVED)
 646       i = a[4];
 647    if (mp->m_flag & MPRESERVE)
 648       i = a[5];
 649    if (mp->m_flag & (MBOX | MBOXED))
 650       i = a[6];
 651    if (mp->m_flag & MFLAGGED)
 652       i = a[7];
 653    if (mb.mb_threaded == 1 && mp->m_collapsed > 0)
 654       i = a[11];
 655    if (mb.mb_threaded == 1 && mp->m_collapsed < 0)
 656       i = a[10];
 657    NYD2_LEAVE;
 658    return i;
 659 }
 660
 661 static int
 662 a_cmd_scroll(char const *arg, bool_t onlynew){
 663    siz_t l;
 664    bool_t isabs;
 665    int msgspec, size, maxs;
 666    NYD2_ENTER;
 667
 668    /* TODO scroll problem: we do not know whether + and $ have already reached
 669     * TODO the last screen in threaded mode */
 670    msgspec = onlynew ? -1 : 0;
 671    size = (int)/*TODO*/n_screensize();
 672    if((maxs = msgCount / size) > 0 && msgCount % size == 0)
 673       --maxs;
 674
 675    if(arg == NULL)
 676       arg = n_empty;
 677    switch(*arg){
 678    case '\0':
 679       ++_screen;
 680       goto jfwd;
 681    case '^':
 682       if(arg[1] != '\0')
 683          goto jerr;
 684       if(_screen == 0)
 685          goto jerrbwd;
 686       _screen = 0;
 687       break;
 688    case '$':
 689       if(arg[1] != '\0')
 690          goto jerr;
 691       if(_screen == maxs)
 692          goto jerrfwd;
 693       _screen = maxs;
 694       break;
 695    case '+':
 696       if(arg[1] == '\0')
 697          ++_screen;
 698       else{
 699          isabs = FAL0;
 700
 701          ++arg;
 702          if(0){
 703    case '1': case '2': case '3': case '4': case '5':
 704    case '6': case '7': case '8': case '9': case '0':
 705             isabs = TRU1;
 706          }
 707          if((n_idec_siz_cp(&l, arg, 0, NULL
 708                   ) & (n_IDEC_STATE_EMASK | n_IDEC_STATE_CONSUMED)
 709                ) != n_IDEC_STATE_CONSUMED)
 710             goto jerr;
 711          if(l > maxs - (isabs ? 0 : _screen))
 712             goto jerrfwd;
 713          _screen = isabs ? (int)l : _screen + l;
 714       }
 715 jfwd:
 716       if(_screen > maxs){
 717 jerrfwd:
 718          _screen = maxs;
 719          fprintf(n_stdout, _("On last screenful of messages\n"));
 720       }
 721       break;
 722
 723    case '-':
 724       if(arg[1] == '\0')
 725          --_screen;
 726       else{
 727          if((n_idec_siz_cp(&l, ++arg, 0, NULL
 728                   ) & (n_IDEC_STATE_EMASK | n_IDEC_STATE_CONSUMED)
 729                ) != n_IDEC_STATE_CONSUMED)
 730             goto jerr;
 731          if(l > _screen)
 732             goto jerrbwd;
 733          _screen -= l;
 734       }
 735       if(_screen < 0){
 736 jerrbwd:
 737          _screen = 0;
 738          fprintf(n_stdout, _("On first screenful of messages\n"));
 739       }
 740       if(msgspec == -1)
 741          msgspec = -2;
 742       break;
 743    default:
 744 jerr:
 745       n_err(_("Unrecognized scrolling command: %s\n"), arg);
 746       size = 1;
 747       goto jleave;
 748    }
 749
 750    size = _headers(msgspec);
 751 jleave:
 752    NYD2_LEAVE;
 753    return size;
 754 }
 755
 756 static int
 757 _headers(int msgspec) /* TODO rework v15 */
 758 {
 759    bool_t needdot, showlast;
 760    int g, k, mesg, size;
 761    struct message *lastmq, *mp, *mq;
 762    int volatile lastg;
 763    ui32_t volatile flag;
 764    enum mflag fl;
 765    NYD_ENTER;
 766
 767    time_current_update(&time_current, FAL0);
 768
 769    fl = MNEW | MFLAGGED;
 770    flag = 0;
 771    lastg = 1;
 772    lastmq = NULL;
 773
 774    size = (int)/*TODO*/n_screensize();
 775    if (_screen < 0)
 776       _screen = 0;
 777 #if 0 /* FIXME original code path */
 778       k = _screen * size;
 779 #else
 780    if (msgspec <= 0)
 781       k = _screen * size;
 782    else
 783       k = msgspec;
 784 #endif
 785    if (k >= msgCount)
 786       k = msgCount - size;
 787    if (k < 0)
 788       k = 0;
 789
 790    needdot = (msgspec <= 0) ? TRU1 : (dot != &message[msgspec - 1]);
 791    showlast = ok_blook(showlast);
 792
 793    if (mb.mb_threaded == 0) {
 794       g = 0;
 795       mq = message;
 796       for (mp = message; PTRCMP(mp, <, message + msgCount); ++mp)
 797          if (visible(mp)) {
 798             if (g % size == 0)
 799                mq = mp;
 800             if (mp->m_flag & fl) {
 801                lastg = g;
 802                lastmq = mq;
 803             }
 804             if ((msgspec > 0 && PTRCMP(mp, ==, message + msgspec - 1)) ||
 805                   (msgspec == 0 && g == k) ||
 806                   (msgspec == -2 && g == k + size && lastmq) ||
 807                   (msgspec < 0 && g >= k && (mp->m_flag & fl) != 0))
 808                break;
 809             g++;
 810          }
 811       if (lastmq && (msgspec == -2 ||
 812             (msgspec == -1 && PTRCMP(mp, ==, message + msgCount)))) {
 813          g = lastg;
 814          mq = lastmq;
 815       }
 816       _screen = g / size;
 817       mp = mq;
 818
 819       mesg = (int)PTR2SIZE(mp - message);
 820 #ifdef HAVE_IMAP
 821       if (mb.mb_type == MB_IMAP)
 822          imap_getheaders(mesg + 1, mesg + size);
 823 #endif
 824       n_COLOUR( n_colour_env_create(n_COLOUR_CTX_SUM, n_stdout, FAL0); )
 825       srelax_hold();
 826       for(lastmq = NULL, mq = &message[msgCount]; mp < mq; lastmq = mp, ++mp){
 827          ++mesg;
 828          if (!visible(mp))
 829             continue;
 830          if (UICMP(32, flag, >=, size))
 831             break;
 832          if(needdot){
 833             if(showlast){
 834                if(UICMP(32, flag, ==, size - 1) || &mp[1] == mq)
 835                   goto jdot_unsort;
 836             }else if(flag == 0){
 837 jdot_unsort:
 838                needdot = FAL0;
 839                setdot(mp);
 840             }
 841          }
 842          ++flag;
 843          a_cmd_print_head(0, mesg, n_stdout, FAL0, FAL0);
 844          srelax();
 845       }
 846       if(needdot && ok_blook(showlast)) /* xxx will not show */
 847          setdot(lastmq);
 848       srelax_rele();
 849       n_COLOUR( n_colour_env_gut(); )
 850    } else { /* threaded */
 851       g = 0;
 852       mq = threadroot;
 853       for (mp = threadroot; mp; mp = next_in_thread(mp))
 854          if (visible(mp) &&
 855                (mp->m_collapsed <= 0 ||
 856                 PTRCMP(mp, ==, message + msgspec - 1))) {
 857             if (g % size == 0)
 858                mq = mp;
 859             if (mp->m_flag & fl) {
 860                lastg = g;
 861                lastmq = mq;
 862             }
 863             if ((msgspec > 0 && PTRCMP(mp, ==, message + msgspec - 1)) ||
 864                   (msgspec == 0 && g == k) ||
 865                   (msgspec == -2 && g == k + size && lastmq) ||
 866                   (msgspec < 0 && g >= k && (mp->m_flag & fl) != 0))
 867                break;
 868             g++;
 869          }
 870       if (lastmq && (msgspec == -2 ||
 871             (msgspec == -1 && PTRCMP(mp, ==, message + msgCount)))) {
 872          g = lastg;
 873          mq = lastmq;
 874       }
 875       _screen = g / size;
 876       mp = mq;
 877
 878       n_COLOUR( n_colour_env_create(n_COLOUR_CTX_SUM, n_stdout, FAL0); )
 879       srelax_hold();
 880       for(lastmq = NULL; mp != NULL; lastmq = mp, mp = mq){
 881          mq = next_in_thread(mp);
 882          if (visible(mp) &&
 883                (mp->m_collapsed <= 0 ||
 884                 PTRCMP(mp, ==, message + msgspec - 1))) {
 885             if (UICMP(32, flag, >=, size))
 886                break;
 887             if(needdot){
 888                if(showlast){
 889                   if(UICMP(32, flag, ==, size - 1) || mq == NULL)
 890                      goto jdot_sort;
 891                }else if(flag == 0){
 892 jdot_sort:
 893                   needdot = FAL0;
 894                   setdot(mp);
 895                }
 896             }
 897             a_cmd_print_head(flag, PTR2SIZE(mp - message + 1), n_stdout,
 898                mb.mb_threaded, TRU1);
 899             ++flag;
 900             srelax();
 901          }
 902       }
 903       if(needdot && ok_blook(showlast)) /* xxx will not show */
 904          setdot(lastmq);
 905       srelax_rele();
 906       n_COLOUR( n_colour_env_gut(); )
 907    }
 908
 909    if (flag == 0) {
 910       fprintf(n_stdout, _("No more mail.\n"));
 911       if (n_pstate & (n_PS_ROBOT | n_PS_HOOK_MASK))
 912          flag = !flag;
 913    }
 914    NYD_LEAVE;
 915    return !flag;
 916 }
 917
 918 FL int
 919 c_headers(void *v)
 920 {
 921    int rv;
 922    NYD_ENTER;
 923
 924    rv = print_header_group((int*)v);
 925    NYD_LEAVE;
 926    return rv;
 927 }
 928
 929 FL int
 930 print_header_group(int *vector)
 931 {
 932    int rv;
 933    NYD_ENTER;
 934
 935    assert(vector != NULL && vector != (void*)-1);
 936    rv = _headers(vector[0]);
 937    NYD_LEAVE;
 938    return rv;
 939 }
 940
 941 FL int
 942 c_scroll(void *v)
 943 {
 944    int rv;
 945    NYD_ENTER;
 946
 947    rv = a_cmd_scroll(*(char const**)v, FAL0);
 948    NYD_LEAVE;
 949    return rv;
 950 }
 951
 952 FL int
 953 c_Scroll(void *v)
 954 {
 955    int rv;
 956    NYD_ENTER;
 957
 958    rv = a_cmd_scroll(*(char const**)v, TRU1);
 959    NYD_LEAVE;
 960    return rv;
 961 }
 962
 963 FL int
 964 c_dotmove(void *v)
 965 {
 966    char const *args;
 967    int msgvec[2], rv;
 968    NYD_ENTER;
 969
 970    if (*(args = v) == '\0' || args[1] != '\0') {
 971 jerr:
 972       n_err(_("Synopsis: dotmove: up <-> or down <+> by one message\n"));
 973       rv = 1;
 974    } else switch (args[0]) {
 975    case '-':
 976    case '+':
 977       if (msgCount == 0) {
 978          fprintf(n_stdout, _("At EOF\n"));
 979          rv = 0;
 980       } else if (getmsglist(n_UNCONST(/*TODO*/ args), msgvec, 0) > 0) {
 981          setdot(message + msgvec[0] - 1);
 982          msgvec[1] = 0;
 983          rv = c_headers(msgvec);
 984       } else
 985          rv = 1;
 986       break;
 987    default:
 988       goto jerr;
 989    }
 990    NYD_LEAVE;
 991    return rv;
 992 }
 993
 994 FL int
 995 c_from(void *vp)
 996 {
 997    int *msgvec, *ip, n;
 998    char *cp;
 999    FILE * volatile obuf;
1000    NYD_ENTER;
1001
1002    if(*(msgvec = vp) == 0)
1003       goto jleave;
1004
1005    time_current_update(&time_current, FAL0);
1006
1007    obuf = n_stdout;
1008
1009    if (n_psonce & n_PSO_INTERACTIVE) {
1010       if ((cp = ok_vlook(crt)) != NULL) {
1011          uiz_t ib;
1012
1013          for (n = 0, ip = msgvec; *ip != 0; ++ip)
1014             ++n;
1015
1016          if(*cp == '\0')
1017             ib = n_screensize();
1018          else
1019             n_idec_uiz_cp(&ib, cp, 0, NULL);
1020          if (UICMP(z, n, >, ib) && (obuf = n_pager_open()) == NULL)
1021             obuf = n_stdout;
1022       }
1023    }
1024
1025    /* Update dot before display so that the dotmark etc. are correct */
1026    for (ip = msgvec; ip[1] != 0; ++ip)
1027       ;
1028    setdot(&message[(ok_blook(showlast) ? *ip : *msgvec) - 1]);
1029
1030    n_COLOUR( n_colour_env_create(n_COLOUR_CTX_SUM, obuf, obuf != n_stdout); )
1031    srelax_hold();
1032    for (n = 0, ip = msgvec; *ip != 0; ++ip) { /* TODO join into _print_head() */
1033       a_cmd_print_head((size_t)n++, (size_t)*ip, obuf, mb.mb_threaded, FAL0);
1034       srelax();
1035    }
1036    srelax_rele();
1037    n_COLOUR( n_colour_env_gut(); )
1038
1039    if (obuf != n_stdout)
1040       n_pager_close(obuf);
1041 jleave:
1042    NYD_LEAVE;
1043    return 0;
1044 }
1045
1046 FL void
1047 print_headers(size_t bottom, size_t topx, bool_t only_marked,
1048    bool_t subject_thread_compress)
1049 {
1050    size_t printed;
1051    NYD_ENTER;
1052
1053 #ifdef HAVE_IMAP
1054    if (mb.mb_type == MB_IMAP)
1055       imap_getheaders(bottom, topx);
1056 #endif
1057    time_current_update(&time_current, FAL0);
1058
1059    n_COLOUR( n_colour_env_create(n_COLOUR_CTX_SUM, n_stdout, FAL0); )
1060    srelax_hold();
1061    for (printed = 0; bottom <= topx; ++bottom) {
1062       struct message *mp = message + bottom - 1;
1063       if (only_marked) {
1064          if (!(mp->m_flag & MMARK))
1065             continue;
1066       } else if (!visible(mp))
1067          continue;
1068       a_cmd_print_head(printed++, bottom, n_stdout, FAL0,
1069          subject_thread_compress);
1070       srelax();
1071    }
1072    srelax_rele();
1073    n_COLOUR( n_colour_env_gut(); )
1074    NYD_LEAVE;
1075 }
1076
1077 /* s-it-mode */