roff_html.c

   1 /*      $Id: roff_html.c,v 1.8 2017/06/08 12:54:58 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_sp,  /* sp */
  42         NULL,  /* ta */
  43         NULL,  /* ti */
  44 };
  45
  46
  47 void
  48 roff_html_pre(struct html *h, const struct roff_node *n)
  49 {
  50         assert(n->tok < ROFF_MAX);
  51         if (roff_html_pre_acts[n->tok] != NULL)
  52                 (*roff_html_pre_acts[n->tok])(h, n);
  53 }
  54
  55 static void
  56 roff_html_pre_br(ROFF_HTML_ARGS)
  57 {
  58         struct tag      *t;
  59
  60         t = print_otag(h, TAG_DIV, "");
  61         print_text(h, "\\~");  /* So the div isn't empty. */
  62         print_tagq(h, t);
  63 }
  64
  65 static void
  66 roff_html_pre_ce(ROFF_HTML_ARGS)
  67 {
  68         for (n = n->child->next; n != NULL; n = n->next) {
  69                 if (n->type == ROFFT_TEXT) {
  70                         if (n->flags & NODE_LINE)
  71                                 roff_html_pre_br(h, n);
  72                         print_text(h, n->string);
  73                 } else
  74                         roff_html_pre(h, n);
  75         }
  76         roff_html_pre_br(h, n);
  77 }
  78
  79 static void
  80 roff_html_pre_sp(ROFF_HTML_ARGS)
  81 {
  82         struct roffsu    su;
  83
  84         SCALE_VS_INIT(&su, 1);
  85         if ((n = n->child) != NULL) {
  86                 if (a2roffsu(n->string, &su, SCALE_VS) == NULL)
  87                         su.scale = 1.0;
  88                 else if (su.scale < 0.0)
  89                         su.scale = 0.0;
  90         }
  91         print_otag(h, TAG_DIV, "suh", &su);
  92         print_text(h, "\\~");  /* So the div isn't empty. */
  93 }