Annotation of mandoc/term_ascii.c, Revision 1.14
1.14 ! kristaps 1: /* $Id: term_ascii.c,v 1.13 2011/05/14 17:54:42 kristaps Exp $ */
1.1 kristaps 2: /*
1.9 schwarze 3: * Copyright (c) 2010 Kristaps Dzonsons <kristaps@bsd.lv>
1.1 kristaps 4: *
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.
8: *
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.
16: */
17: #ifdef HAVE_CONFIG_H
18: #include "config.h"
19: #endif
20:
21: #include <sys/types.h>
22:
23: #include <assert.h>
24: #include <stdint.h>
25: #include <stdio.h>
26: #include <stdlib.h>
1.2 kristaps 27: #include <unistd.h>
1.1 kristaps 28:
1.11 kristaps 29: #include "mandoc.h"
1.1 kristaps 30: #include "out.h"
31: #include "term.h"
32: #include "main.h"
33:
1.14 ! kristaps 34: static struct termp *ascii_init(enum termenc, char *);
1.8 kristaps 35: static double ascii_hspan(const struct termp *,
1.7 kristaps 36: const struct roffsu *);
1.13 kristaps 37: static size_t ascii_width(const struct termp *, int);
1.7 kristaps 38: static void ascii_advance(struct termp *, size_t);
39: static void ascii_begin(struct termp *);
40: static void ascii_end(struct termp *);
1.1 kristaps 41: static void ascii_endline(struct termp *);
1.13 kristaps 42: static void ascii_letter(struct termp *, int);
1.1 kristaps 43:
1.14 ! kristaps 44: static struct termp *
! 45: ascii_init(enum termenc enc, char *outopts)
1.1 kristaps 46: {
47: const char *toks[2];
48: char *v;
1.14 ! kristaps 49: struct termp *p;
1.1 kristaps 50:
1.14 ! kristaps 51: p = mandoc_calloc(1, sizeof(struct termp));
! 52: p->enc = enc;
1.1 kristaps 53:
1.5 kristaps 54: p->tabwidth = 5;
55: p->defrmargin = 78;
56:
1.7 kristaps 57: p->advance = ascii_advance;
1.1 kristaps 58: p->begin = ascii_begin;
59: p->end = ascii_end;
60: p->endline = ascii_endline;
1.7 kristaps 61: p->hspan = ascii_hspan;
62: p->letter = ascii_letter;
63: p->type = TERMTYPE_CHAR;
1.5 kristaps 64: p->width = ascii_width;
1.1 kristaps 65:
66: toks[0] = "width";
67: toks[1] = NULL;
68:
69: while (outopts && *outopts)
70: switch (getsubopt(&outopts, UNCONST(toks), &v)) {
71: case (0):
72: p->defrmargin = (size_t)atoi(v);
73: break;
74: default:
75: break;
76: }
77:
78: /* Enforce a lower boundary. */
79: if (p->defrmargin < 58)
80: p->defrmargin = 58;
81:
82: return(p);
1.5 kristaps 83: }
84:
1.14 ! kristaps 85: void *
! 86: ascii_alloc(char *outopts)
! 87: {
! 88:
! 89: return(ascii_init(TERMENC_ASCII, outopts));
! 90: }
! 91:
! 92: void *
! 93: locale_alloc(char *outopts)
! 94: {
! 95:
! 96: return(ascii_init(TERMENC_LOCALE, outopts));
! 97: }
1.5 kristaps 98:
1.6 kristaps 99: /* ARGSUSED */
1.5 kristaps 100: static size_t
1.13 kristaps 101: ascii_width(const struct termp *p, int c)
1.5 kristaps 102: {
103:
104: return(1);
1.1 kristaps 105: }
106:
107:
108: void
109: ascii_free(void *arg)
110: {
111:
112: term_free((struct termp *)arg);
113: }
114:
115:
116: /* ARGSUSED */
117: static void
1.13 kristaps 118: ascii_letter(struct termp *p, int c)
1.1 kristaps 119: {
120:
1.10 kristaps 121: /* LINTED */
1.1 kristaps 122: putchar(c);
123: }
124:
125:
126: static void
127: ascii_begin(struct termp *p)
128: {
129:
130: (*p->headf)(p, p->argf);
131: }
132:
133:
134: static void
135: ascii_end(struct termp *p)
136: {
137:
138: (*p->footf)(p, p->argf);
139: }
140:
141:
142: /* ARGSUSED */
143: static void
144: ascii_endline(struct termp *p)
145: {
146:
147: putchar('\n');
148: }
149:
150:
151: /* ARGSUSED */
152: static void
153: ascii_advance(struct termp *p, size_t len)
154: {
155: size_t i;
156:
157: /* Just print whitespace on the terminal. */
158: for (i = 0; i < len; i++)
159: putchar(' ');
160: }
1.7 kristaps 161:
162:
163: /* ARGSUSED */
1.8 kristaps 164: static double
1.7 kristaps 165: ascii_hspan(const struct termp *p, const struct roffsu *su)
166: {
167: double r;
168:
169: /*
170: * Approximate based on character width. These are generated
171: * entirely by eyeballing the screen, but appear to be correct.
172: */
173:
174: switch (su->unit) {
175: case (SCALE_CM):
176: r = 4 * su->scale;
177: break;
178: case (SCALE_IN):
179: r = 10 * su->scale;
180: break;
181: case (SCALE_PC):
182: r = (10 * su->scale) / 6;
183: break;
184: case (SCALE_PT):
185: r = (10 * su->scale) / 72;
186: break;
187: case (SCALE_MM):
188: r = su->scale / 1000;
189: break;
190: case (SCALE_VS):
191: r = su->scale * 2 - 1;
192: break;
193: default:
194: r = su->scale;
195: break;
196: }
197:
1.8 kristaps 198: return(r);
1.7 kristaps 199: }
200:
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