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Revision 1.20, Tue Apr 30 15:53:01 2019 UTC (15 months, 1 week ago) by schwarze
Branch: MAIN
Changes since 1.19: +2 -2 lines

In HTML output, allow switching the desired font for subsequent
text without printing an opening tag right away, and use that in
the .ft request handler.  While here, garbage collect redundant
enum htmlfont and reduce code duplication in print_text().
Fixing an assertion failure reported by Michael <Stapelberg at Debian>
in pmRegisterDerived(3) from libpcp3-dev.

/*	$Id: roff_html.c,v 1.20 2019/04/30 15:53:01 schwarze Exp $ */
/*
 * Copyright (c) 2010 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2014, 2017, 2018, 2019 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 <stdio.h>
#include <string.h>

#include "mandoc.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_fi(ROFF_HTML_ARGS);
static	void	  roff_html_pre_ft(ROFF_HTML_ARGS);
static	void	  roff_html_pre_nf(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 */
	roff_html_pre_fi,  /* fi */
	roff_html_pre_ft,  /* ft */
	NULL,  /* ll */
	NULL,  /* mc */
	roff_html_pre_nf,  /* nf */
	NULL,  /* po */
	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)
{
	print_otag(h, TAG_BR, "");
}

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_fi(ROFF_HTML_ARGS)
{
	if (html_fillmode(h, TOKEN_NONE) == ROFF_fi)
		print_otag(h, TAG_BR, "");
}

static void
roff_html_pre_ft(ROFF_HTML_ARGS)
{
	const char	*cp;

	cp = n->child->string;
	html_setfont(h, mandoc_font(cp, (int)strlen(cp)));
}

static void
roff_html_pre_nf(ROFF_HTML_ARGS)
{
	if (html_fillmode(h, TOKEN_NONE) == ROFF_nf)
		print_otag(h, TAG_BR, "");
}

static void
roff_html_pre_sp(ROFF_HTML_ARGS)
{
	if (html_fillmode(h, TOKEN_NONE) == ROFF_nf) {
		h->col++;
		print_endline(h);
	} else {
		html_close_paragraph(h);
		print_otag(h, TAG_P, "c", "Pp");
	}
}