1 /* $Id: term_ascii.c,v 1.12 2011/01/25 17:32:04 kristaps Exp $ */
3 * Copyright (c) 2010 Kristaps Dzonsons <kristaps@bsd.lv>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 #include <sys/types.h>
34 static double ascii_hspan(const struct termp *,
35 const struct roffsu *);
36 static size_t ascii_width(const struct termp *, char);
37 static void ascii_advance(struct termp *, size_t);
38 static void ascii_begin(struct termp *);
39 static void ascii_end(struct termp *);
40 static void ascii_endline(struct termp *);
41 static void ascii_letter(struct termp *, char);
45 ascii_alloc(char *outopts)
51 p = term_alloc(TERMENC_ASCII);
56 p->advance = ascii_advance;
57 p->begin = ascii_begin;
59 p->endline = ascii_endline;
60 p->hspan = ascii_hspan;
61 p->letter = ascii_letter;
62 p->type = TERMTYPE_CHAR;
63 p->width = ascii_width;
68 while (outopts && *outopts)
69 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
71 p->defrmargin = (size_t)atoi(v);
77 /* Enforce a lower boundary. */
78 if (p->defrmargin < 58)
87 ascii_width(const struct termp *p, char c)
98 term_free((struct termp *)arg);
104 ascii_letter(struct termp *p, char c)
113 ascii_begin(struct termp *p)
116 (*p->headf)(p, p->argf);
121 ascii_end(struct termp *p)
124 (*p->footf)(p, p->argf);
130 ascii_endline(struct termp *p)
139 ascii_advance(struct termp *p, size_t len)
143 /* Just print whitespace on the terminal. */
144 for (i = 0; i < len; i++)
151 ascii_hspan(const struct termp *p, const struct roffsu *su)
156 * Approximate based on character width. These are generated
157 * entirely by eyeballing the screen, but appear to be correct.
168 r = (10 * su->scale) / 6;
171 r = (10 * su->scale) / 72;
174 r = su->scale / 1000;
177 r = su->scale * 2 - 1;