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/* $Id: term_ascii.c,v 1.6 2011/05/29 21:22:18 schwarze Exp $ */
/*
* Copyright (c) 2010, 2011 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.
*/
#include <sys/types.h>
#include <assert.h>
#include <locale.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <wchar.h>
#include "mandoc.h"
#include "out.h"
#include "term.h"
#include "main.h"
static struct termp *ascii_init(enum termenc, char *);
static double ascii_hspan(const struct termp *,
const struct roffsu *);
static size_t ascii_width(const struct termp *, int);
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 *, int);
static void locale_advance(struct termp *, size_t);
static void locale_endline(struct termp *);
static void locale_letter(struct termp *, int);
static size_t locale_width(const struct termp *, int);
static struct termp *
ascii_init(enum termenc enc, char *outopts)
{
const char *toks[2];
char *v;
struct termp *p;
p = mandoc_calloc(1, sizeof(struct termp));
p->enc = enc;
p->tabwidth = 5;
p->defrmargin = 78;
p->begin = ascii_begin;
p->end = ascii_end;
p->hspan = ascii_hspan;
p->type = TERMTYPE_CHAR;
p->enc = TERMENC_ASCII;
p->advance = ascii_advance;
p->endline = ascii_endline;
p->letter = ascii_letter;
p->width = ascii_width;
if (TERMENC_ASCII != enc) {
v = TERMENC_LOCALE == enc ?
setlocale(LC_ALL, "") :
setlocale(LC_CTYPE, "UTF-8");
if (NULL != v && MB_CUR_MAX > 1) {
p->enc = enc;
p->advance = locale_advance;
p->endline = locale_endline;
p->letter = locale_letter;
p->width = locale_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);
}
void *
ascii_alloc(char *outopts)
{
return(ascii_init(TERMENC_ASCII, outopts));
}
void *
utf8_alloc(char *outopts)
{
return(ascii_init(TERMENC_UTF8, outopts));
}
void *
locale_alloc(char *outopts)
{
return(ascii_init(TERMENC_LOCALE, outopts));
}
/* ARGSUSED */
static size_t
ascii_width(const struct termp *p, int c)
{
return(1);
}
void
ascii_free(void *arg)
{
term_free((struct termp *)arg);
}
/* ARGSUSED */
static void
ascii_letter(struct termp *p, int 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;
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);
}
/* ARGSUSED */
static size_t
locale_width(const struct termp *p, int c)
{
int rc;
return((rc = wcwidth(c)) < 0 ? 0 : rc);
}
/* ARGSUSED */
static void
locale_advance(struct termp *p, size_t len)
{
size_t i;
for (i = 0; i < len; i++)
putwchar(L' ');
}
/* ARGSUSED */
static void
locale_endline(struct termp *p)
{
putwchar(L'\n');
}
/* ARGSUSED */
static void
locale_letter(struct termp *p, int c)
{
putwchar(c);
}
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