Return to term_ascii.c CVS log

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Initial chunks for variable-width fonts.  Pushes all width calculations
in mdoc_term.c and man_term.c down into term.c.  This is still not
implemented in term.c, although stubs for width calculations are in
place.  From now on, offset, rmargin, and other layout variables are
abstract screen widths.  They will resolve to the the familiar values
for -Tascii but -Tps will eventually use points instead of chars.

/*	$Id: term_ascii.c,v 1.5 2010/06/25 18:53:14 kristaps Exp $ */
/*
 * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
 *
 * 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.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <sys/types.h>

#include <assert.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "out.h"
#include "term.h"
#include "main.h"

static	void		  ascii_endline(struct termp *);
static	void		  ascii_letter(struct termp *, char);
static	void		  ascii_begin(struct termp *);
static	void		  ascii_advance(struct termp *, size_t);
static	void		  ascii_end(struct termp *);
static	size_t		  ascii_width(const struct termp *, char);


void *
ascii_alloc(char *outopts)
{
	struct termp	*p;
	const char	*toks[2];
	char		*v;

	if (NULL == (p = term_alloc(TERMENC_ASCII)))
		return(NULL);

	p->tabwidth = 5;
	p->defrmargin = 78;

	p->type = TERMTYPE_CHAR;
	p->letter = ascii_letter;
	p->begin = ascii_begin;
	p->end = ascii_end;
	p->endline = ascii_endline;
	p->advance = ascii_advance;
	p->width = ascii_width;

	toks[0] = "width";
	toks[1] = NULL;

	while (outopts && *outopts)
		switch (getsubopt(&outopts, UNCONST(toks), &v)) {
		case (0):
			p->defrmargin = (size_t)atoi(v);
			break;
		default:
			break;
		}

	/* Enforce a lower boundary. */
	if (p->defrmargin < 58)
		p->defrmargin = 58;

	return(p);
}


static size_t
ascii_width(const struct termp *p, char c)
{

	return(1);
}


void
ascii_free(void *arg)
{

	term_free((struct termp *)arg);
}


/* ARGSUSED */
static void
ascii_letter(struct termp *p, char c)
{
	
	putchar(c);
}


static void
ascii_begin(struct termp *p)
{

	(*p->headf)(p, p->argf);
}


static void
ascii_end(struct termp *p)
{

	(*p->footf)(p, p->argf);
}


/* ARGSUSED */
static void
ascii_endline(struct termp *p)
{

	putchar('\n');
}


/* ARGSUSED */
static void
ascii_advance(struct termp *p, size_t len)
{
	size_t	 	i;

	/* Just print whitespace on the terminal. */
	for (i = 0; i < len; i++)
		putchar(' ');
}