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/* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
Written by Gaius Mulley (gaius@glam.ac.uk)
This file is part of groff.
groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
groff is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with groff; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "nonposix.h"
#include "stringclass.h"
#include "html-strings.h"
/*
* This file contains a very simple set of routines shared by
* tbl, pic, eqn which help the html device driver to make
* sensible formatting choices. Currently it simply indicates
* to pre-html when an image is about to be created this is then
* passes to pre-html.
* Pre-html runs troff twice, once with -Thtml and once with -Tps.
* troff -Thtml device driver emits a <src='image'.png> tag
* and the postscript device driver works out the min/max limits
* of the graphic region. These region limits are read by pre-html
* and an image is generated via troff -Tps -> gs -> png
*/
static int is_in_graphic_start = 0;
static int is_inline_image = 0;
/*
* html_begin_suppress - emit a start of image tag which will be seen
* by pre-html.
*/
void html_begin_suppress(int is_inline)
{
if (is_inline)
put_string(HTML_IMAGE_INLINE_BEGIN, stdout);
else {
put_string(HTML_IMAGE_CENTERED, stdout);
put_string("\n", stdout);
}
}
/*
* html_end_suppress - emit an end of image tag which will be seen
* by pre-html.
*/
void html_end_suppress(int is_inline)
{
if (is_inline)
put_string(HTML_IMAGE_INLINE_END, stdout);
else {
put_string(HTML_IMAGE_END, stdout);
put_string("\n", stdout);
}
}
/*
* graphic_start - The boolean, is_inline, should be:
*
* FALSE if this is called via EQ, TS, PS, and
* TRUE if issued via delim $$ $ x over y $ etc.
*/
void graphic_start(int is_inline)
{
if (!is_in_graphic_start) {
html_begin_suppress(is_inline);
is_inline_image = is_inline;
is_in_graphic_start = 1;
}
}
/*
* graphic_end - tell troff that the image region is ending.
*/
void graphic_end()
{
if (is_in_graphic_start) {
html_end_suppress(is_inline_image);
is_in_graphic_start = 0;
}
}
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