Annotation of mandoc/term_ascii.c, Revision 1.17
1.17 ! kristaps 1: /* $Id: term_ascii.c,v 1.16 2011/05/19 15:48:58 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>
1.15 kristaps 24: #ifdef USE_WCHAR
25: # include <locale.h>
26: #endif
1.1 kristaps 27: #include <stdint.h>
28: #include <stdio.h>
29: #include <stdlib.h>
1.2 kristaps 30: #include <unistd.h>
1.15 kristaps 31: #ifdef USE_WCHAR
32: # include <wchar.h>
33: #endif
1.1 kristaps 34:
1.11 kristaps 35: #include "mandoc.h"
1.1 kristaps 36: #include "out.h"
37: #include "term.h"
38: #include "main.h"
39:
1.16 kristaps 40: /*
41: * Sadly, this doesn't seem to be defined on systems even when they
42: * support it. For the time being, remove it and let those compiling
43: * the software decide for themselves what to use.
44: */
45: #if 0
1.15 kristaps 46: #if ! defined(__STDC_ISO_10646__)
47: # undef USE_WCHAR
1.16 kristaps 48: #endif
1.15 kristaps 49: #endif
50:
1.14 kristaps 51: static struct termp *ascii_init(enum termenc, char *);
1.8 kristaps 52: static double ascii_hspan(const struct termp *,
1.7 kristaps 53: const struct roffsu *);
1.13 kristaps 54: static size_t ascii_width(const struct termp *, int);
1.7 kristaps 55: static void ascii_advance(struct termp *, size_t);
56: static void ascii_begin(struct termp *);
57: static void ascii_end(struct termp *);
1.1 kristaps 58: static void ascii_endline(struct termp *);
1.13 kristaps 59: static void ascii_letter(struct termp *, int);
1.1 kristaps 60:
1.15 kristaps 61: #ifdef USE_WCHAR
62: static void locale_advance(struct termp *, size_t);
63: static void locale_endline(struct termp *);
64: static void locale_letter(struct termp *, int);
65: static size_t locale_width(const struct termp *, int);
66: #endif
67:
1.14 kristaps 68: static struct termp *
69: ascii_init(enum termenc enc, char *outopts)
1.1 kristaps 70: {
71: const char *toks[2];
72: char *v;
1.14 kristaps 73: struct termp *p;
1.1 kristaps 74:
1.14 kristaps 75: p = mandoc_calloc(1, sizeof(struct termp));
76: p->enc = enc;
1.1 kristaps 77:
1.5 kristaps 78: p->tabwidth = 5;
79: p->defrmargin = 78;
80:
1.1 kristaps 81: p->begin = ascii_begin;
82: p->end = ascii_end;
1.15 kristaps 83: p->hspan = ascii_hspan;
84: p->type = TERMTYPE_CHAR;
85:
86: p->enc = TERMENC_ASCII;
87: p->advance = ascii_advance;
1.1 kristaps 88: p->endline = ascii_endline;
1.7 kristaps 89: p->letter = ascii_letter;
1.5 kristaps 90: p->width = ascii_width;
1.1 kristaps 91:
1.17 ! kristaps 92: #ifdef USE_WCHAR
! 93: if (TERMENC_ASCII != enc) {
! 94: v = TERMENC_LOCALE == enc ?
! 95: setlocale(LC_ALL, "") :
! 96: setlocale(LC_CTYPE, "UTF-8");
! 97: if (NULL != v && MB_CUR_MAX > 1) {
1.15 kristaps 98: p->enc = enc;
99: p->advance = locale_advance;
100: p->endline = locale_endline;
101: p->letter = locale_letter;
102: p->width = locale_width;
103: }
1.17 ! kristaps 104: }
1.15 kristaps 105: #endif
106:
1.1 kristaps 107: toks[0] = "width";
108: toks[1] = NULL;
109:
110: while (outopts && *outopts)
111: switch (getsubopt(&outopts, UNCONST(toks), &v)) {
112: case (0):
113: p->defrmargin = (size_t)atoi(v);
114: break;
115: default:
116: break;
117: }
118:
119: /* Enforce a lower boundary. */
120: if (p->defrmargin < 58)
121: p->defrmargin = 58;
122:
123: return(p);
1.5 kristaps 124: }
125:
1.14 kristaps 126: void *
127: ascii_alloc(char *outopts)
128: {
129:
130: return(ascii_init(TERMENC_ASCII, outopts));
131: }
1.17 ! kristaps 132:
! 133: void *
! 134: utf8_alloc(char *outopts)
! 135: {
! 136:
! 137: return(ascii_init(TERMENC_UTF8, outopts));
! 138: }
! 139:
1.14 kristaps 140:
141: void *
142: locale_alloc(char *outopts)
143: {
144:
145: return(ascii_init(TERMENC_LOCALE, outopts));
146: }
1.5 kristaps 147:
1.6 kristaps 148: /* ARGSUSED */
1.5 kristaps 149: static size_t
1.13 kristaps 150: ascii_width(const struct termp *p, int c)
1.5 kristaps 151: {
152:
153: return(1);
1.1 kristaps 154: }
155:
156: void
157: ascii_free(void *arg)
158: {
159:
160: term_free((struct termp *)arg);
161: }
162:
163: /* ARGSUSED */
164: static void
1.13 kristaps 165: ascii_letter(struct termp *p, int c)
1.1 kristaps 166: {
167:
168: putchar(c);
169: }
170:
171: static void
172: ascii_begin(struct termp *p)
173: {
174:
175: (*p->headf)(p, p->argf);
176: }
177:
178: static void
179: ascii_end(struct termp *p)
180: {
181:
182: (*p->footf)(p, p->argf);
183: }
184:
185: /* ARGSUSED */
186: static void
187: ascii_endline(struct termp *p)
188: {
189:
190: putchar('\n');
191: }
192:
193: /* ARGSUSED */
194: static void
195: ascii_advance(struct termp *p, size_t len)
196: {
197: size_t i;
198:
199: for (i = 0; i < len; i++)
200: putchar(' ');
201: }
1.7 kristaps 202:
203: /* ARGSUSED */
1.8 kristaps 204: static double
1.7 kristaps 205: ascii_hspan(const struct termp *p, const struct roffsu *su)
206: {
207: double r;
208:
209: /*
210: * Approximate based on character width. These are generated
211: * entirely by eyeballing the screen, but appear to be correct.
212: */
213:
214: switch (su->unit) {
215: case (SCALE_CM):
216: r = 4 * su->scale;
217: break;
218: case (SCALE_IN):
219: r = 10 * su->scale;
220: break;
221: case (SCALE_PC):
222: r = (10 * su->scale) / 6;
223: break;
224: case (SCALE_PT):
225: r = (10 * su->scale) / 72;
226: break;
227: case (SCALE_MM):
228: r = su->scale / 1000;
229: break;
230: case (SCALE_VS):
231: r = su->scale * 2 - 1;
232: break;
233: default:
234: r = su->scale;
235: break;
236: }
237:
1.8 kristaps 238: return(r);
1.7 kristaps 239: }
240:
1.15 kristaps 241: #ifdef USE_WCHAR
242: /* ARGSUSED */
243: static size_t
244: locale_width(const struct termp *p, int c)
245: {
246: int rc;
247:
248: return((rc = wcwidth(c)) < 0 ? 0 : rc);
249: }
250:
251: /* ARGSUSED */
252: static void
253: locale_advance(struct termp *p, size_t len)
254: {
255: size_t i;
256:
257: for (i = 0; i < len; i++)
258: putwchar(L' ');
259: }
260:
261: /* ARGSUSED */
262: static void
263: locale_endline(struct termp *p)
264: {
265:
266: putwchar(L'\n');
267: }
268:
269: /* ARGSUSED */
270: static void
271: locale_letter(struct termp *p, int c)
272: {
273:
274: putwchar(c);
275: }
276: #endif
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