roff_term.c

   1 /*      $OpenBSD$ */
   2 /*
   3  * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #include <sys/types.h>
  18
  19 #include <assert.h>
  20
  21 #include "roff.h"
  22 #include "out.h"
  23 #include "term.h"
  24
  25 #define ROFF_TERM_ARGS struct termp *p, const struct roff_node *n
  26
  27 typedef void    (*roff_term_pre_fp)(ROFF_TERM_ARGS);
  28
  29 static  void      roff_term_pre_br(ROFF_TERM_ARGS);
  30
  31 static  const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
  32         roff_term_pre_br,  /* br */
  33 };
  34
  35
  36 void
  37 roff_term_pre(struct termp *p, const struct roff_node *n)
  38 {
  39         assert(n->tok < ROFF_MAX);
  40         (*roff_term_pre_acts[n->tok])(p, n);
  41 }
  42
  43 static void
  44 roff_term_pre_br(ROFF_TERM_ARGS)
  45 {
  46         term_newln(p);
  47         if (p->flags & TERMP_BRIND) {
  48                 p->offset = p->rmargin;
  49                 p->rmargin = p->maxrmargin;
  50                 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
  51         }
  52 }