roff_html.c

   1 /*      $Id: roff_html.c,v 1.9 2017/06/14 13:00:31 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2010 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2014, 2017 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #include <sys/types.h>
  19
  20 #include <assert.h>
  21 #include <stddef.h>
  22
  23 #include "roff.h"
  24 #include "out.h"
  25 #include "html.h"
  26
  27 #define ROFF_HTML_ARGS struct html *h, const struct roff_node *n
  28
  29 typedef void    (*roff_html_pre_fp)(ROFF_HTML_ARGS);
  30
  31 static  void      roff_html_pre_br(ROFF_HTML_ARGS);
  32 static  void      roff_html_pre_ce(ROFF_HTML_ARGS);
  33 static  void      roff_html_pre_sp(ROFF_HTML_ARGS);
  34
  35 static  const roff_html_pre_fp roff_html_pre_acts[ROFF_MAX] = {
  36         roff_html_pre_br,  /* br */
  37         roff_html_pre_ce,  /* ce */
  38         NULL,  /* ft */
  39         NULL,  /* ll */
  40         NULL,  /* mc */
  41         roff_html_pre_ce,  /* rj */
  42         roff_html_pre_sp,  /* sp */
  43         NULL,  /* ta */
  44         NULL,  /* ti */
  45 };
  46
  47
  48 void
  49 roff_html_pre(struct html *h, const struct roff_node *n)
  50 {
  51         assert(n->tok < ROFF_MAX);
  52         if (roff_html_pre_acts[n->tok] != NULL)
  53                 (*roff_html_pre_acts[n->tok])(h, n);
  54 }
  55
  56 static void
  57 roff_html_pre_br(ROFF_HTML_ARGS)
  58 {
  59         struct tag      *t;
  60
  61         t = print_otag(h, TAG_DIV, "");
  62         print_text(h, "\\~");  /* So the div isn't empty. */
  63         print_tagq(h, t);
  64 }
  65
  66 static void
  67 roff_html_pre_ce(ROFF_HTML_ARGS)
  68 {
  69         for (n = n->child->next; n != NULL; n = n->next) {
  70                 if (n->type == ROFFT_TEXT) {
  71                         if (n->flags & NODE_LINE)
  72                                 roff_html_pre_br(h, n);
  73                         print_text(h, n->string);
  74                 } else
  75                         roff_html_pre(h, n);
  76         }
  77         roff_html_pre_br(h, n);
  78 }
  79
  80 static void
  81 roff_html_pre_sp(ROFF_HTML_ARGS)
  82 {
  83         struct roffsu    su;
  84
  85         SCALE_VS_INIT(&su, 1);
  86         if ((n = n->child) != NULL) {
  87                 if (a2roffsu(n->string, &su, SCALE_VS) == NULL)
  88                         su.scale = 1.0;
  89                 else if (su.scale < 0.0)
  90                         su.scale = 0.0;
  91         }
  92         print_otag(h, TAG_DIV, "suh", &su);
  93         print_text(h, "\\~");  /* So the div isn't empty. */
  94 }