src/libs/libgroff/htmlindicate.cc

   1 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
   2      Written by Gaius Mulley (gaius@glam.ac.uk)
   3
   4 This file is part of groff.
   5
   6 groff is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License along
  17 with groff; see the file COPYING.  If not, write to the Free Software
  18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
  19
  20 #include <stddef.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include "posix.h"
  25 #include "stringclass.h"
  26
  27 /*
  28  *  this file contains a very simple set of routines shared by
  29  *  tbl, pic, eqn which help the html device driver to make
  30  *  sensible formatting choices. Currently it simply indicates
  31  *  when a region of gyphs should be rendered as an image rather
  32  *  than html. In the future it should be expanded so to enable:
  33  *
  34  *    tbl    to inform grohtml about table widths.
  35  *    troff  to inform grohtml about tab positions and whether
  36  *           we are entering two/three column mode.
  37  */
  38
  39
  40 static int is_in_graphic_start = 0;
  41
  42 /*
  43  *  graphic_start - emit a html graphic start indicator, but only
  44  *                  if one has not already been issued.
  45  */
  46
  47 void graphic_start (void)
  48 {
  49   if (! is_in_graphic_start) {
  50     put_string(".if '\\*(.T'html' \\X(graphic-start(\\c\n", stdout);
  51     is_in_graphic_start = 1;
  52   }
  53 }
  54
  55 /*
  56  *  graphic_end - emit a html graphic end indicator, but only
  57  *                if a corresponding matching graphic-start has
  58  *                been issued.
  59  */
  60
  61 void graphic_end (void)
  62 {
  63   if (is_in_graphic_start) {
  64     put_string(".if '\\*(.T'html' \\X(graphic-end(\\c\n", stdout);
  65     is_in_graphic_start = 0;
  66   }
  67 }