/*	$Id: roff_html.c,v 1.9 2017/06/14 13:00:31 schwarze Exp $ */
/*
 * Copyright (c) 2010 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2014, 2017 Ingo Schwarze <schwarze@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include <sys/types.h>

#include <assert.h>
#include <stddef.h>

#include "roff.h"
#include "out.h"
#include "html.h"

#define	ROFF_HTML_ARGS struct html *h, const struct roff_node *n

typedef	void	(*roff_html_pre_fp)(ROFF_HTML_ARGS);

static	void	  roff_html_pre_br(ROFF_HTML_ARGS);
static	void	  roff_html_pre_ce(ROFF_HTML_ARGS);
static	void	  roff_html_pre_sp(ROFF_HTML_ARGS);

static	const roff_html_pre_fp roff_html_pre_acts[ROFF_MAX] = {
	roff_html_pre_br,  /* br */
	roff_html_pre_ce,  /* ce */
	NULL,  /* ft */
	NULL,  /* ll */
	NULL,  /* mc */
	roff_html_pre_ce,  /* rj */
	roff_html_pre_sp,  /* sp */
	NULL,  /* ta */
	NULL,  /* ti */
};


void
roff_html_pre(struct html *h, const struct roff_node *n)
{
	assert(n->tok < ROFF_MAX);
	if (roff_html_pre_acts[n->tok] != NULL)
		(*roff_html_pre_acts[n->tok])(h, n);
}

static void
roff_html_pre_br(ROFF_HTML_ARGS)
{
	struct tag	*t;

	t = print_otag(h, TAG_DIV, "");
	print_text(h, "\\~");  /* So the div isn't empty. */
	print_tagq(h, t);
}

static void
roff_html_pre_ce(ROFF_HTML_ARGS)
{
	for (n = n->child->next; n != NULL; n = n->next) {
		if (n->type == ROFFT_TEXT) {
			if (n->flags & NODE_LINE)
				roff_html_pre_br(h, n);
			print_text(h, n->string);
		} else
			roff_html_pre(h, n);
	}
	roff_html_pre_br(h, n);
}

static void
roff_html_pre_sp(ROFF_HTML_ARGS)
{
	struct roffsu	 su;

	SCALE_VS_INIT(&su, 1);
	if ((n = n->child) != NULL) {
		if (a2roffsu(n->string, &su, SCALE_VS) == NULL)
			su.scale = 1.0;
		else if (su.scale < 0.0)
			su.scale = 0.0;
	}
	print_otag(h, TAG_DIV, "suh", &su);
	print_text(h, "\\~");  /* So the div isn't empty. */
}