cmd-head.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  * SPDX-License-Identifier: BSD-3-Clause
   7  */
   8 /*
   9  * Copyright (c) 1980, 1993
  10  *      The Regents of the University of California.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36 #undef n_FILE
  37 #define n_FILE cmd_head
  38
  39 #ifndef HAVE_AMALGAMATION
  40 # include "nail.h"
  41 #endif
  42
  43 static int        _screen;
  44
  45 /* Print out the header of a specific message.
  46  * time_current must be up-to-date when this is called.
  47  * a_chead__hprf: handle *headline*
  48  * a_chead__subject: -1 if Subject: yet seen, otherwise n_alloc()d Subject:
  49  * a_chead__putindent: print out the indenting in threaded display
  50  * a_chead__putuc: print out a Unicode character or a substitute for it, return
  51  *    0 on error or wcwidth() (or 1) on success */
  52 static void a_chead_print_head(size_t yetprinted, size_t msgno, FILE *f,
  53                bool_t threaded, bool_t subject_thread_compress);
  54
  55 static void a_chead__hprf(size_t yetprinted, char const *fmt, size_t msgno,
  56                FILE *f, bool_t threaded, bool_t subject_thread_compress,
  57                char const *attrlist);
  58 static char *a_chead__subject(struct message *mp, bool_t threaded,
  59                bool_t subject_thread_compress, size_t yetprinted);
  60 static int a_chead__putindent(FILE *fp, struct message *mp, int maxwidth);
  61 static size_t a_chead__putuc(int u, int c, FILE *fp);
  62 static int a_chead__dispc(struct message *mp, char const *a);
  63
  64 /* Shared `z' implementation */
  65 static int a_chead_scroll(char const *arg, bool_t onlynew);
  66
  67 /* Shared `headers' implementation */
  68 static int     _headers(int msgspec);
  69
  70 static void
  71 a_chead_print_head(size_t yetprinted, size_t msgno, FILE *f, bool_t threaded,
  72       bool_t subject_thread_compress){
  73    enum {attrlen = 14};
  74    char attrlist[attrlen +1], *cp;
  75    char const *fmt;
  76    NYD2_ENTER;
  77
  78    if((cp = ok_vlook(attrlist)) != NULL){
  79       if(strlen(cp) == attrlen){
  80          memcpy(attrlist, cp, attrlen +1);
  81          goto jattrok;
  82       }
  83       n_err(_("*attrlist* is not of the correct length, using built-in\n"));
  84    }
  85
  86    if(ok_blook(bsdcompat) || ok_blook(bsdflags)){
  87       char const bsdattr[attrlen +1] = "NU  *HMFAT+-$~";
  88
  89       memcpy(attrlist, bsdattr, sizeof bsdattr);
  90    }else if(ok_blook(SYSV3)){
  91       char const bsdattr[attrlen +1] = "NU  *HMFAT+-$~";
  92
  93       memcpy(attrlist, bsdattr, sizeof bsdattr);
  94       n_OBSOLETE(_("*SYSV3*: please use *bsdcompat* or *bsdflags*, "
  95          "or set *attrlist*"));
  96    }else{
  97       char const pattr[attrlen +1]   = "NUROSPMFAT+-$~";
  98
  99       memcpy(attrlist, pattr, sizeof pattr);
 100    }
 101
 102 jattrok:
 103    if((fmt = ok_vlook(headline)) == NULL){
 104       fmt = ((ok_blook(bsdcompat) || ok_blook(bsdheadline))
 105             ? "%>%a%m %-20f  %16d %4l/%-5o %i%-S"
 106             : "%>%a%m %-18f %-16d %4l/%-5o %i%-s");
 107    }
 108
 109    a_chead__hprf(yetprinted, fmt, msgno, f, threaded, subject_thread_compress,
 110       attrlist);
 111    NYD2_LEAVE;
 112 }
 113
 114 static void
 115 a_chead__hprf(size_t yetprinted, char const *fmt, size_t msgno, FILE *f,
 116    bool_t threaded, bool_t subject_thread_compress, char const *attrlist)
 117 {
 118    char buf[16], cbuf[8], *cp, *subjline;
 119    char const *date, *name, *fp, *color_tag;
 120    int i, n, s, wleft, subjlen;
 121    struct message *mp;
 122    n_COLOUR( struct n_colour_pen *cpen_new COMMA *cpen_cur COMMA *cpen_bas; )
 123    enum {
 124       _NONE       = 0,
 125       _ISDOT      = 1<<0,
 126       _ISTO       = 1<<1,
 127       _IFMT       = 1<<2,
 128       _LOOP_MASK  = (1<<4) - 1,
 129       _SFMT       = 1<<4,        /* It is 'S' */
 130       /* For the simple byte-based counts in wleft and n we sometimes need
 131        * adjustments to compensate for additional bytes of UTF-8 sequences */
 132       _PUTCB_UTF8_SHIFT = 5,
 133       _PUTCB_UTF8_MASK = 3<<5
 134    } flags = _NONE;
 135    NYD2_ENTER;
 136    n_UNUSED(buf);
 137
 138    if ((mp = message + msgno - 1) == dot)
 139       flags = _ISDOT;
 140
 141    color_tag = NULL;
 142    date = n_header_textual_date_info(mp, &color_tag);
 143    /* C99 */{
 144       bool_t isto;
 145
 146       n_header_textual_sender_info(mp, &cp, NULL, NULL, NULL, &isto);
 147       name = cp;
 148       if(isto)
 149          flags |= _ISTO;
 150    }
 151
 152    subjline = NULL;
 153
 154    /* Detect the width of the non-format characters in *headline*;
 155     * like that we can simply use putc() in the next loop, since we have
 156     * already calculated their column widths (TODO it's sick) */
 157    wleft = subjlen = n_scrnwidth;
 158
 159    for (fp = fmt; *fp != '\0'; ++fp) {
 160       if (*fp == '%') {
 161          if (*++fp == '-')
 162             ++fp;
 163          else if (*fp == '+')
 164             ++fp;
 165          if (digitchar(*fp)) {
 166             n = 0;
 167             do
 168                n = 10*n + *fp - '0';
 169             while (++fp, digitchar(*fp));
 170             subjlen -= n;
 171          }
 172          if (*fp == 'i')
 173             flags |= _IFMT;
 174
 175          if (*fp == '\0')
 176             break;
 177       } else {
 178 #ifdef HAVE_WCWIDTH
 179          if (n_mb_cur_max > 1) {
 180             wchar_t  wc;
 181             if ((s = mbtowc(&wc, fp, n_mb_cur_max)) == -1)
 182                n = s = 1;
 183             else if ((n = wcwidth(wc)) == -1)
 184                n = 1;
 185          } else
 186 #endif
 187             n = s = 1;
 188          subjlen -= n;
 189          wleft -= n;
 190          while (--s > 0)
 191             ++fp;
 192       }
 193    }
 194
 195    /* Walk *headline*, producing output TODO not (really) MB safe */
 196 #ifdef HAVE_COLOUR
 197    if(n_COLOUR_IS_ACTIVE()){
 198       if(flags & _ISDOT)
 199          color_tag = n_COLOUR_TAG_SUM_DOT;
 200       cpen_bas = n_colour_pen_create(n_COLOUR_ID_SUM_HEADER, color_tag);
 201       n_colour_pen_put(cpen_new = cpen_cur = cpen_bas);
 202    }else
 203       cpen_new = cpen_bas = cpen_cur = NULL;
 204 #endif
 205
 206    for (fp = fmt; *fp != '\0'; ++fp) {
 207       char c;
 208
 209       if ((c = *fp & 0xFF) != '%') {
 210          n_COLOUR(
 211             if(n_COLOUR_IS_ACTIVE() && (cpen_new = cpen_bas) != cpen_cur)
 212                n_colour_pen_put(cpen_cur = cpen_new);
 213          );
 214          putc(c, f);
 215          continue;
 216       }
 217
 218       flags &= _LOOP_MASK;
 219       n = 0;
 220       s = 1;
 221       if ((c = *++fp) == '-') {
 222          s = -1;
 223          ++fp;
 224       } else if (c == '+')
 225          ++fp;
 226       if (digitchar(*fp)) {
 227          do
 228             n = 10*n + *fp - '0';
 229          while (++fp, digitchar(*fp));
 230       }
 231
 232       if ((c = *fp & 0xFF) == '\0')
 233          break;
 234       n *= s;
 235
 236       cbuf[1] = '\0';
 237       switch (c) {
 238       case '%':
 239          goto jputcb;
 240       case '>':
 241       case '<':
 242          if (flags & _ISDOT) {
 243             n_COLOUR(
 244                if(n_COLOUR_IS_ACTIVE())
 245                   cpen_new = n_colour_pen_create(n_COLOUR_ID_SUM_DOTMARK,
 246                         color_tag);
 247             );
 248             if((n_psonce & n_PSO_UNICODE) && !ok_blook(headline_plain)){
 249                if (c == '>')
 250                   /* 25B8;BLACK RIGHT-POINTING SMALL TRIANGLE */
 251                   cbuf[1] = (char)0x96, cbuf[2] = (char)0xB8;
 252                else
 253                   /* 25C2;BLACK LEFT-POINTING SMALL TRIANGLE */
 254                   cbuf[1] = (char)0x97, cbuf[2] = (char)0x82;
 255                c = (char)0xE2;
 256                cbuf[3] = '\0';
 257                flags |= 2 << _PUTCB_UTF8_SHIFT;
 258             }
 259          } else
 260             c = ' ';
 261          goto jputcb;
 262       case '$':
 263 #ifdef HAVE_SPAM
 264          if (n == 0)
 265             n = 5;
 266          if (UICMP(32, n_ABS(n), >, wleft))
 267             n = (n < 0) ? -wleft : wleft;
 268          snprintf(buf, sizeof buf, "%u.%02u",
 269             (mp->m_spamscore >> 8), (mp->m_spamscore & 0xFF));
 270          n = fprintf(f, "%*s", n, buf);
 271          wleft = (n >= 0) ? wleft - n : 0;
 272          break;
 273 #else
 274          c = '?';
 275          goto jputcb;
 276 #endif
 277       case 'a':
 278          c = a_chead__dispc(mp, attrlist);
 279 jputcb:
 280 #ifdef HAVE_COLOUR
 281          if(n_COLOUR_IS_ACTIVE()){
 282             if(cpen_new == cpen_cur)
 283                cpen_new = cpen_bas;
 284             if(cpen_new != cpen_cur)
 285                n_colour_pen_put(cpen_cur = cpen_new);
 286          }
 287 #endif
 288          if (UICMP(32, n_ABS(n), >, wleft))
 289             n = (n < 0) ? -wleft : wleft;
 290          cbuf[0] = c;
 291          n = fprintf(f, "%*s", n, cbuf);
 292          if (n >= 0) {
 293             wleft -= n;
 294             if ((n = (flags & _PUTCB_UTF8_MASK)) != 0) {
 295                n >>= _PUTCB_UTF8_SHIFT;
 296                wleft += n;
 297             }
 298          } else {
 299             wleft = 0; /* TODO I/O error.. ? break? */
 300          }
 301 #ifdef HAVE_COLOUR
 302          if(n_COLOUR_IS_ACTIVE() && (cpen_new = cpen_bas) != cpen_cur)
 303             n_colour_pen_put(cpen_cur = cpen_new);
 304 #endif
 305          break;
 306       case 'd':
 307          if (n == 0)
 308             n = 16;
 309          if (UICMP(32, n_ABS(n), >, wleft))
 310             n = (n < 0) ? -wleft : wleft;
 311          n = fprintf(f, "%*.*s", n, n_ABS(n), date);
 312          wleft = (n >= 0) ? wleft - n : 0;
 313          break;
 314       case 'e':
 315          if (n == 0)
 316             n = 2;
 317          if (UICMP(32, n_ABS(n), >, wleft))
 318             n = (n < 0) ? -wleft : wleft;
 319          n = fprintf(f, "%*u", n, (threaded == 1 ? mp->m_level : 0));
 320          wleft = (n >= 0) ? wleft - n : 0;
 321          break;
 322       case 'f':
 323          if (n == 0) {
 324             n = 18;
 325             if (s < 0)
 326                n = -n;
 327          }
 328          i = n_ABS(n);
 329          if (i > wleft) {
 330             i = wleft;
 331             n = (n < 0) ? -wleft : wleft;
 332          }
 333          if (flags & _ISTO) /* XXX tr()! */
 334             i -= 3;
 335          n = fprintf(f, "%s%s", ((flags & _ISTO) ? "To " : n_empty),
 336                colalign(name, i, n, &wleft));
 337          if (n < 0)
 338             wleft = 0;
 339          else if (flags & _ISTO)
 340             wleft -= 3;
 341          break;
 342       case 'i':
 343          if (threaded) {
 344 #ifdef HAVE_COLOUR
 345             if(n_COLOUR_IS_ACTIVE()){
 346                cpen_new = n_colour_pen_create(n_COLOUR_ID_SUM_THREAD,
 347                      color_tag);
 348                if(cpen_new != cpen_cur)
 349                   n_colour_pen_put(cpen_cur = cpen_new);
 350             }
 351 #endif
 352             n = a_chead__putindent(f, mp, n_MIN(wleft, (int)n_scrnwidth - 60));
 353             wleft = (n >= 0) ? wleft - n : 0;
 354 #ifdef HAVE_COLOUR
 355             if(n_COLOUR_IS_ACTIVE() && (cpen_new = cpen_bas) != cpen_cur)
 356                n_colour_pen_put(cpen_cur = cpen_new);
 357 #endif
 358          }
 359          break;
 360       case 'l':
 361          if (n == 0)
 362             n = 4;
 363          if (UICMP(32, n_ABS(n), >, wleft))
 364             n = (n < 0) ? -wleft : wleft;
 365          if (mp->m_xlines) {
 366             n = fprintf(f, "%*ld", n, mp->m_xlines);
 367             wleft = (n >= 0) ? wleft - n : 0;
 368          } else {
 369             n = n_ABS(n);
 370             wleft -= n;
 371             while (n-- != 0)
 372                putc(' ', f);
 373          }
 374          break;
 375       case 'm':
 376          if (n == 0) {
 377             n = 3;
 378             if (threaded)
 379                for (i = msgCount; i > 999; i /= 10)
 380                   ++n;
 381          }
 382          if (UICMP(32, n_ABS(n), >, wleft))
 383             n = (n < 0) ? -wleft : wleft;
 384          n = fprintf(f, "%*lu", n, (ul_i)msgno);
 385          wleft = (n >= 0) ? wleft - n : 0;
 386          break;
 387       case 'o':
 388          if (n == 0)
 389             n = -5;
 390          if (UICMP(32, n_ABS(n), >, wleft))
 391             n = (n < 0) ? -wleft : wleft;
 392          n = fprintf(f, "%*lu", n, (ul_i)mp->m_xsize);
 393          wleft = (n >= 0) ? wleft - n : 0;
 394          break;
 395       case 'S':
 396          flags |= _SFMT;
 397          /*FALLTHRU*/
 398       case 's':
 399          if (n == 0)
 400             n = subjlen - 2;
 401          if (n > 0 && s < 0)
 402             n = -n;
 403          if (subjlen > wleft)
 404             subjlen = wleft;
 405          if (UICMP(32, n_ABS(n), >, subjlen))
 406             n = (n < 0) ? -subjlen : subjlen;
 407          if (flags & _SFMT)
 408             n -= (n < 0) ? -2 : 2;
 409          if (n == 0)
 410             break;
 411          if (subjline == NULL)
 412             subjline = a_chead__subject(mp, (threaded && (flags & _IFMT)),
 413                   subject_thread_compress, yetprinted);
 414          if (subjline == (char*)-1) {
 415             n = fprintf(f, "%*s", n, n_empty);
 416             wleft = (n >= 0) ? wleft - n : 0;
 417          } else {
 418             n = fprintf(f, ((flags & _SFMT) ? "\"%s\"" : "%s"),
 419                   colalign(subjline, n_ABS(n), n, &wleft));
 420             if (n < 0)
 421                wleft = 0;
 422          }
 423          break;
 424       case 'T': /* Message recipient flags */
 425          switch(is_mlist_mp(mp, MLIST_OTHER)){
 426          case MLIST_OTHER: c = ' '; break;
 427          case MLIST_KNOWN: c = 'l'; break;
 428          case MLIST_SUBSCRIBED: c = 'L'; break;
 429          }
 430          goto jputcb;
 431       case 't':
 432          if (n == 0) {
 433             n = 3;
 434             if (threaded)
 435                for (i = msgCount; i > 999; i /= 10)
 436                   ++n;
 437          }
 438          if (UICMP(32, n_ABS(n), >, wleft))
 439             n = (n < 0) ? -wleft : wleft;
 440          n = fprintf(f, "%*lu",
 441                n, (threaded ? (ul_i)mp->m_threadpos : (ul_i)msgno));
 442          wleft = (n >= 0) ? wleft - n : 0;
 443          break;
 444       case 'U':
 445 #ifdef HAVE_IMAP
 446             if (n == 0)
 447                n = 9;
 448             if (UICMP(32, n_ABS(n), >, wleft))
 449                n = (n < 0) ? -wleft : wleft;
 450             n = fprintf(f, "%*" PRIu64 , n, mp->m_uid);
 451             wleft = (n >= 0) ? wleft - n : 0;
 452             break;
 453 #else
 454             c = '0';
 455             goto jputcb;
 456 #endif
 457       default:
 458          if (n_poption & n_PO_D_V)
 459             n_err(_("Unknown *headline* format: %%%c\n"), c);
 460          c = '?';
 461          goto jputcb;
 462       }
 463
 464       if (wleft <= 0)
 465          break;
 466    }
 467
 468    n_COLOUR( n_colour_reset(); )
 469    putc('\n', f);
 470
 471    if (subjline != NULL && subjline != (char*)-1)
 472       n_free(subjline);
 473    NYD2_LEAVE;
 474 }
 475
 476 static char *
 477 a_chead__subject(struct message *mp, bool_t threaded,
 478    bool_t subject_thread_compress, size_t yetprinted)
 479 {
 480    struct str in, out;
 481    char *rv, *ms;
 482    NYD2_ENTER;
 483
 484    rv = (char*)-1;
 485
 486    if ((ms = hfield1("subject", mp)) == NULL)
 487       goto jleave;
 488
 489    in.l = strlen(in.s = ms);
 490    mime_fromhdr(&in, &out, TD_ICONV | TD_ISPR);
 491    rv = ms = out.s;
 492
 493    if (!threaded || !subject_thread_compress || mp->m_level == 0)
 494       goto jleave;
 495
 496    /* In a display thread - check whether this message uses the same
 497     * Subject: as it's parent or elder neighbour, suppress printing it if
 498     * this is the case.  To extend this a bit, ignore any leading Re: or
 499     * Fwd: plus follow-up WS.  Ignore invisible messages along the way */
 500    ms = n_UNCONST(subject_re_trim(n_UNCONST(ms)));
 501
 502    for (; (mp = prev_in_thread(mp)) != NULL && yetprinted-- > 0;) {
 503       char *os;
 504
 505       if (visible(mp) && (os = hfield1("subject", mp)) != NULL) {
 506          struct str oout;
 507          int x;
 508
 509          in.l = strlen(in.s = os);
 510          mime_fromhdr(&in, &oout, TD_ICONV | TD_ISPR);
 511          x = asccasecmp(ms, subject_re_trim(oout.s));
 512          n_free(oout.s);
 513
 514          if (!x) {
 515             n_free(out.s);
 516             rv = (char*)-1;
 517          }
 518          break;
 519       }
 520    }
 521 jleave:
 522    NYD2_LEAVE;
 523    return rv;
 524 }
 525
 526 static int
 527 a_chead__putindent(FILE *fp, struct message *mp, int maxwidth)/* XXX magics */
 528 {
 529    struct message *mq;
 530    int *us, indlvl, indw, i, important = MNEW | MFLAGGED;
 531    char *cs;
 532    NYD2_ENTER;
 533
 534    if (mp->m_level == 0 || maxwidth == 0) {
 535       indw = 0;
 536       goto jleave;
 537    }
 538
 539    cs = n_lofi_alloc(mp->m_level);
 540    us = n_lofi_alloc(mp->m_level * sizeof *us);
 541
 542    i = mp->m_level - 1;
 543    if (mp->m_younger && UICMP(32, i + 1, ==, mp->m_younger->m_level)) {
 544       if (mp->m_parent && mp->m_parent->m_flag & important)
 545          us[i] = mp->m_flag & important ? 0x2523 : 0x2520;
 546       else
 547          us[i] = mp->m_flag & important ? 0x251D : 0x251C;
 548       cs[i] = '+';
 549    } else {
 550       if (mp->m_parent && mp->m_parent->m_flag & important)
 551          us[i] = mp->m_flag & important ? 0x2517 : 0x2516;
 552       else
 553          us[i] = mp->m_flag & important ? 0x2515 : 0x2514;
 554       cs[i] = '\\';
 555    }
 556
 557    mq = mp->m_parent;
 558    for (i = mp->m_level - 2; i >= 0; --i) {
 559       if (mq) {
 560          if (UICMP(32, i, >, mq->m_level - 1)) {
 561             us[i] = cs[i] = ' ';
 562             continue;
 563          }
 564          if (mq->m_younger) {
 565             if (mq->m_parent && (mq->m_parent->m_flag & important))
 566                us[i] = 0x2503;
 567             else
 568                us[i] = 0x2502;
 569             cs[i] = '|';
 570          } else
 571             us[i] = cs[i] = ' ';
 572          mq = mq->m_parent;
 573       } else
 574          us[i] = cs[i] = ' ';
 575    }
 576
 577    --maxwidth;
 578    for (indlvl = indw = 0; (ui8_t)indlvl < mp->m_level && indw < maxwidth;
 579          ++indlvl) {
 580       if (indw < maxwidth - 1)
 581          indw += (int)a_chead__putuc(us[indlvl], cs[indlvl] & 0xFF, fp);
 582       else
 583          indw += (int)a_chead__putuc(0x21B8, '^', fp);
 584    }
 585    indw += a_chead__putuc(0x25B8, '>', fp);
 586
 587    n_lofi_free(us);
 588    n_lofi_free(cs);
 589 jleave:
 590    NYD2_LEAVE;
 591    return indw;
 592 }
 593
 594 static size_t
 595 a_chead__putuc(int u, int c, FILE *fp){
 596    size_t rv;
 597    NYD2_ENTER;
 598    n_UNUSED(u);
 599
 600 #ifdef HAVE_NATCH_CHAR
 601    if((n_psonce & n_PSO_UNICODE) && (u & ~(wchar_t)0177) &&
 602          !ok_blook(headline_plain)){
 603       char mbb[MB_LEN_MAX];
 604       int i, n;
 605
 606       if((n = wctomb(mbb, u)) > 0){
 607          rv = wcwidth(u);
 608          for(i = 0; i < n; ++i)
 609             if(putc(mbb[i] & 0377, fp) == EOF){
 610                rv = 0;
 611                break;
 612             }
 613       }else if(n == 0)
 614          rv = (putc('\0', fp) != EOF);
 615       else
 616          rv = 0;
 617    }else
 618 #endif
 619       rv = (putc(c, fp) != EOF);
 620    NYD2_LEAVE;
 621    return rv;
 622 }
 623
 624 static int
 625 a_chead__dispc(struct message *mp, char const *a)
 626 {
 627    int i = ' ';
 628    NYD2_ENTER;
 629
 630    if ((mp->m_flag & (MREAD | MNEW)) == MREAD)
 631       i = a[3];
 632    if ((mp->m_flag & (MREAD | MNEW)) == (MREAD | MNEW))
 633       i = a[2];
 634    if (mp->m_flag & MANSWERED)
 635       i = a[8];
 636    if (mp->m_flag & MDRAFTED)
 637       i = a[9];
 638    if ((mp->m_flag & (MREAD | MNEW)) == MNEW)
 639       i = a[0];
 640    if (!(mp->m_flag & (MREAD | MNEW)))
 641       i = a[1];
 642    if (mp->m_flag & MSPAM)
 643       i = a[12];
 644    if (mp->m_flag & MSPAMUNSURE)
 645       i = a[13];
 646    if (mp->m_flag & MSAVED)
 647       i = a[4];
 648    if (mp->m_flag & MPRESERVE)
 649       i = a[5];
 650    if (mp->m_flag & (MBOX | MBOXED))
 651       i = a[6];
 652    if (mp->m_flag & MFLAGGED)
 653       i = a[7];
 654    if (mb.mb_threaded == 1) { /* TODO bad, and m_collapsed is weird */
 655       /* TODO So this does not work because of weird thread handling and
 656        * TODO intermixing view and controller except when run via -L from
 657        * TODO command line; in general these flags should go and we need
 658        * TODO specific *headline* formats which always work and indicate
 659        * TODO whether a message is in a thread, the head of a subthread etc. */
 660       if (mp->m_collapsed > 0)
 661          i = a[11];
 662       else if (mp->m_collapsed < 0)
 663          i = a[10];
 664    }
 665    NYD2_LEAVE;
 666    return i;
 667 }
 668
 669 static int
 670 a_chead_scroll(char const *arg, bool_t onlynew){
 671    siz_t l;
 672    bool_t isabs;
 673    int msgspec, size, maxs;
 674    NYD2_ENTER;
 675
 676    /* TODO scroll problem: we do not know whether + and $ have already reached
 677     * TODO the last screen in threaded mode */
 678    msgspec = onlynew ? -1 : 0;
 679    size = (int)/*TODO*/n_screensize();
 680    if((maxs = msgCount / size) > 0 && msgCount % size == 0)
 681       --maxs;
 682
 683    if(arg == NULL)
 684       arg = n_empty;
 685    switch(*arg){
 686    case '\0':
 687       ++_screen;
 688       goto jfwd;
 689    case '^':
 690       if(arg[1] != '\0')
 691          goto jerr;
 692       if(_screen == 0)
 693          goto jerrbwd;
 694       _screen = 0;
 695       break;
 696    case '$':
 697       if(arg[1] != '\0')
 698          goto jerr;
 699       if(_screen == maxs)
 700          goto jerrfwd;
 701       _screen = maxs;
 702       break;
 703    case '+':
 704       if(arg[1] == '\0')
 705          ++_screen;
 706       else{
 707          isabs = FAL0;
 708
 709          ++arg;
 710          if(0){
 711    case '1': case '2': case '3': case '4': case '5':
 712    case '6': case '7': case '8': case '9': case '0':
 713             isabs = TRU1;
 714          }
 715          if((n_idec_siz_cp(&l, arg, 0, NULL
 716                   ) & (n_IDEC_STATE_EMASK | n_IDEC_STATE_CONSUMED)
 717                ) != n_IDEC_STATE_CONSUMED)
 718             goto jerr;
 719          if(l > maxs - (isabs ? 0 : _screen))
 720             goto jerrfwd;
 721          _screen = isabs ? (int)l : _screen + l;
 722       }
 723 jfwd:
 724       if(_screen > maxs){
 725 jerrfwd:
 726          _screen = maxs;
 727          fprintf(n_stdout, _("On last screenful of messages\n"));
 728       }
 729       break;
 730
 731    case '-':
 732       if(arg[1] == '\0')
 733          --_screen;
 734       else{
 735          if((n_idec_siz_cp(&l, ++arg, 0, NULL
 736                   ) & (n_IDEC_STATE_EMASK | n_IDEC_STATE_CONSUMED)
 737                ) != n_IDEC_STATE_CONSUMED)
 738             goto jerr;
 739          if(l > _screen)
 740             goto jerrbwd;
 741          _screen -= l;
 742       }
 743       if(_screen < 0){
 744 jerrbwd:
 745          _screen = 0;
 746          fprintf(n_stdout, _("On first screenful of messages\n"));
 747       }
 748       if(msgspec == -1)
 749          msgspec = -2;
 750       break;
 751    default:
 752 jerr:
 753       n_err(_("Unrecognized scrolling command: %s\n"), arg);
 754       size = 1;
 755       goto jleave;
 756    }
 757
 758    size = _headers(msgspec);
 759 jleave:
 760    NYD2_LEAVE;
 761    return size;
 762 }
 763
 764 static int
 765 _headers(int msgspec) /* TODO rework v15 */
 766 {
 767    bool_t needdot, showlast;
 768    int g, k, mesg, size;
 769    struct message *lastmq, *mp, *mq;
 770    int volatile lastg;
 771    ui32_t volatile flag;
 772    enum mflag fl;
 773    NYD_ENTER;
 774
 775    time_current_update(&time_current, FAL0);
 776
 777    fl = MNEW | MFLAGGED;
 778    flag = 0;
 779    lastg = 1;
 780    lastmq = NULL;
 781
 782    size = (int)/*TODO*/n_screensize();
 783    if (_screen < 0)
 784       _screen = 0;
 785 #if 0 /* FIXME original code path */
 786       k = _screen * size;
 787 #else
 788    if (msgspec <= 0)
 789       k = _screen * size;
 790    else
 791       k = msgspec;
 792 #endif
 793    if (k >= msgCount)
 794       k = msgCount - size;
 795    if (k < 0)
 796       k = 0;
 797
 798    needdot = (msgspec <= 0) ? TRU1 : (dot != &message[msgspec - 1]);
 799    showlast = ok_blook(showlast);
 800
 801    if (mb.mb_threaded == 0) {
 802       g = 0;
 803       mq = message;
 804       for (mp = message; PTRCMP(mp, <, message + msgCount); ++mp)
 805          if (visible(mp)) {
 806             if (g % size == 0)
 807                mq = mp;
 808             if (mp->m_flag & fl) {
 809                lastg = g;
 810                lastmq = mq;
 811             }
 812             if ((msgspec > 0 && PTRCMP(mp, ==, message + msgspec - 1)) ||
 813                   (msgspec == 0 && g == k) ||
 814                   (msgspec == -2 && g == k + size && lastmq) ||
 815                   (msgspec < 0 && g >= k && (mp->m_flag & fl) != 0))
 816                break;
 817             g++;
 818          }
 819       if (lastmq && (msgspec == -2 ||
 820             (msgspec == -1 && PTRCMP(mp, ==, message + msgCount)))) {
 821          g = lastg;
 822          mq = lastmq;
 823       }
 824       _screen = g / size;
 825       mp = mq;
 826
 827       mesg = (int)PTR2SIZE(mp - message);
 828 #ifdef HAVE_IMAP
 829       if (mb.mb_type == MB_IMAP)
 830          imap_getheaders(mesg + 1, mesg + size);
 831 #endif
 832       n_COLOUR( n_colour_env_create(n_COLOUR_CTX_SUM, n_stdout, FAL0); )
 833       srelax_hold();
 834       for(lastmq = NULL, mq = &message[msgCount]; mp < mq; lastmq = mp, ++mp){
 835          ++mesg;
 836          if (!visible(mp))
 837             continue;
 838          if (UICMP(32, flag, >=, size))
 839             break;
 840          if(needdot){
 841             if(showlast){
 842                if(UICMP(32, flag, ==, size - 1) || &mp[1] == mq)
 843                   goto jdot_unsort;
 844             }else if(flag == 0){
 845 jdot_unsort:
 846                needdot = FAL0;
 847                setdot(mp);
 848             }
 849          }
 850          ++flag;
 851          a_chead_print_head(0, mesg, n_stdout, FAL0, FAL0);
 852          srelax();
 853       }
 854       if(needdot && ok_blook(showlast)) /* xxx will not show */
 855          setdot(lastmq);
 856       srelax_rele();
 857       n_COLOUR( n_colour_env_gut(); )
 858    } else { /* threaded */
 859       g = 0;
 860       mq = threadroot;
 861       for (mp = threadroot; mp; mp = next_in_thread(mp)){
 862          /* TODO thread handling needs rewrite, m_collapsed must go */
 863          if (visible(mp) &&
 864                (mp->m_collapsed <= 0 ||
 865                 PTRCMP(mp, ==, message + msgspec - 1))) {
 866             if (g % size == 0)
 867                mq = mp;
 868             if (mp->m_flag & fl) {
 869                lastg = g;
 870                lastmq = mq;
 871             }
 872             if ((msgspec > 0 && PTRCMP(mp, ==, message + msgspec - 1)) ||
 873                   (msgspec == 0 && g == k) ||
 874                   (msgspec == -2 && g == k + size && lastmq) ||
 875                   (msgspec < 0 && g >= k && (mp->m_flag & fl) != 0))
 876                break;
 877             g++;
 878          }
 879       }
 880       if (lastmq && (msgspec == -2 ||
 881             (msgspec == -1 && PTRCMP(mp, ==, message + msgCount)))) {
 882          g = lastg;
 883          mq = lastmq;
 884       }
 885       _screen = g / size;
 886       mp = mq;
 887
 888       n_COLOUR( n_colour_env_create(n_COLOUR_CTX_SUM, n_stdout, FAL0); )
 889       srelax_hold();
 890       for(lastmq = NULL; mp != NULL; lastmq = mp, mp = mq){
 891          mq = next_in_thread(mp);
 892          if (visible(mp) &&
 893                (mp->m_collapsed <= 0 ||
 894                 PTRCMP(mp, ==, message + msgspec - 1))) {
 895             if (UICMP(32, flag, >=, size))
 896                break;
 897             if(needdot){
 898                if(showlast){
 899                   if(UICMP(32, flag, ==, size - 1) || mq == NULL)
 900                      goto jdot_sort;
 901                }else if(flag == 0){
 902 jdot_sort:
 903                   needdot = FAL0;
 904                   setdot(mp);
 905                }
 906             }
 907             a_chead_print_head(flag, PTR2SIZE(mp - message + 1), n_stdout,
 908                mb.mb_threaded, TRU1);
 909             ++flag;
 910             srelax();
 911          }
 912       }
 913       if(needdot && ok_blook(showlast)) /* xxx will not show */
 914          setdot(lastmq);
 915       srelax_rele();
 916       n_COLOUR( n_colour_env_gut(); )
 917    }
 918
 919    if (flag == 0) {
 920       fprintf(n_stdout, _("No more mail.\n"));
 921       if (n_pstate & (n_PS_ROBOT | n_PS_HOOK_MASK))
 922          flag = !flag;
 923    }
 924    NYD_LEAVE;
 925    return !flag;
 926 }
 927
 928 FL int
 929 c_headers(void *v)
 930 {
 931    int rv;
 932    NYD_ENTER;
 933
 934    rv = print_header_group((int*)v);
 935    NYD_LEAVE;
 936    return rv;
 937 }
 938
 939 FL int
 940 print_header_group(int *vector)
 941 {
 942    int rv;
 943    NYD_ENTER;
 944
 945    assert(vector != NULL && vector != (void*)-1);
 946    rv = _headers(vector[0]);
 947    NYD_LEAVE;
 948    return rv;
 949 }
 950
 951 FL int
 952 c_scroll(void *v)
 953 {
 954    int rv;
 955    NYD_ENTER;
 956
 957    rv = a_chead_scroll(*(char const**)v, FAL0);
 958    NYD_LEAVE;
 959    return rv;
 960 }
 961
 962 FL int
 963 c_Scroll(void *v)
 964 {
 965    int rv;
 966    NYD_ENTER;
 967
 968    rv = a_chead_scroll(*(char const**)v, TRU1);
 969    NYD_LEAVE;
 970    return rv;
 971 }
 972
 973 FL int
 974 c_dotmove(void *v)
 975 {
 976    char const *args;
 977    int msgvec[2], rv;
 978    NYD_ENTER;
 979
 980    if (*(args = v) == '\0' || args[1] != '\0') {
 981 jerr:
 982       n_err(_("Synopsis: dotmove: up <-> or down <+> by one message\n"));
 983       rv = 1;
 984    } else switch (args[0]) {
 985    case '-':
 986    case '+':
 987       if (msgCount == 0) {
 988          fprintf(n_stdout, _("At EOF\n"));
 989          rv = 0;
 990       } else if (n_getmsglist(n_UNCONST(/*TODO*/args), msgvec, 0, NULL) > 0) {
 991          setdot(message + msgvec[0] - 1);
 992          msgvec[1] = 0;
 993          rv = c_headers(msgvec);
 994       } else
 995          rv = 1;
 996       break;
 997    default:
 998       goto jerr;
 999    }
1000    NYD_LEAVE;
1001    return rv;
1002 }
1003
1004 FL int
1005 c_from(void *vp)
1006 {
1007    int *msgvec, *ip, n;
1008    char *cp;
1009    FILE * volatile obuf;
1010    NYD_ENTER;
1011
1012    if(*(msgvec = vp) == 0)
1013       goto jleave;
1014
1015    time_current_update(&time_current, FAL0);
1016
1017    obuf = n_stdout;
1018
1019    if (n_psonce & n_PSO_INTERACTIVE) {
1020       if ((cp = ok_vlook(crt)) != NULL) {
1021          uiz_t ib;
1022
1023          for (n = 0, ip = msgvec; *ip != 0; ++ip)
1024             ++n;
1025
1026          if(*cp == '\0')
1027             ib = n_screensize();
1028          else
1029             n_idec_uiz_cp(&ib, cp, 0, NULL);
1030          if (UICMP(z, n, >, ib) && (obuf = n_pager_open()) == NULL)
1031             obuf = n_stdout;
1032       }
1033    }
1034
1035    /* Update dot before display so that the dotmark etc. are correct */
1036    for (ip = msgvec; ip[1] != 0; ++ip)
1037       ;
1038    setdot(&message[(ok_blook(showlast) ? *ip : *msgvec) - 1]);
1039
1040    n_COLOUR( n_colour_env_create(n_COLOUR_CTX_SUM, obuf, obuf != n_stdout); )
1041    srelax_hold();
1042    for (n = 0, ip = msgvec; *ip != 0; ++ip) { /* TODO join into _print_head() */
1043       a_chead_print_head((size_t)n++, (size_t)*ip, obuf, mb.mb_threaded, FAL0);
1044       srelax();
1045    }
1046    srelax_rele();
1047    n_COLOUR( n_colour_env_gut(); )
1048
1049    if (obuf != n_stdout)
1050       n_pager_close(obuf);
1051 jleave:
1052    NYD_LEAVE;
1053    return 0;
1054 }
1055
1056 FL void
1057 print_headers(int const *msgvec, bool_t only_marked,
1058    bool_t subject_thread_compress)
1059 {
1060    size_t printed;
1061    NYD_ENTER;
1062
1063    time_current_update(&time_current, FAL0);
1064
1065    n_COLOUR( n_colour_env_create(n_COLOUR_CTX_SUM, n_stdout, FAL0); )
1066    srelax_hold();
1067    for(printed = 0; *msgvec != 0; ++msgvec) {
1068       struct message *mp = message + *msgvec - 1;
1069       if (only_marked) {
1070          if (!(mp->m_flag & MMARK))
1071             continue;
1072       } else if (!visible(mp))
1073          continue;
1074       a_chead_print_head(printed++, *msgvec, n_stdout, mb.mb_threaded,
1075          subject_thread_compress);
1076       srelax();
1077    }
1078    srelax_rele();
1079    n_COLOUR( n_colour_env_gut(); )
1080    NYD_LEAVE;
1081 }
1082
1083 /* s-it-mode */