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/* $Id: term_ascii.c,v 1.3 2010/07/13 01:09:13 schwarze Exp $ */
/*
* Copyright (c) 2010 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 double ascii_hspan(const struct termp *,
const struct roffsu *);
static size_t ascii_width(const struct termp *, char);
static void ascii_advance(struct termp *, size_t);
static void ascii_begin(struct termp *);
static void ascii_end(struct termp *);
static void ascii_endline(struct termp *);
static void ascii_letter(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->advance = ascii_advance;
p->begin = ascii_begin;
p->end = ascii_end;
p->endline = ascii_endline;
p->hspan = ascii_hspan;
p->letter = ascii_letter;
p->type = TERMTYPE_CHAR;
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);
}
/* ARGSUSED */
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(' ');
}
/* ARGSUSED */
static double
ascii_hspan(const struct termp *p, const struct roffsu *su)
{
double r;
/*
* Approximate based on character width. These are generated
* entirely by eyeballing the screen, but appear to be correct.
*/
switch (su->unit) {
case (SCALE_CM):
r = 4 * su->scale;
break;
case (SCALE_IN):
r = 10 * su->scale;
break;
case (SCALE_PC):
r = (10 * su->scale) / 6;
break;
case (SCALE_PT):
r = (10 * su->scale) / 72;
break;
case (SCALE_MM):
r = su->scale / 1000;
break;
case (SCALE_VS):
r = su->scale * 2 - 1;
break;
default:
r = su->scale;
break;
}
return(r);
}
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