1 /* $Id: term_ascii.c,v 1.21 2013/06/01 14:27:20 schwarze Exp $ */
2 /*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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 #ifdef USE_WCHAR
25 # include <locale.h>
26 #endif
27 #include <stdint.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <unistd.h>
31 #ifdef USE_WCHAR
32 # include <wchar.h>
33 #endif
34
35 #include "mandoc.h"
36 #include "out.h"
37 #include "term.h"
38 #include "main.h"
39
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
46 #if ! defined(__STDC_ISO_10646__)
47 # undef USE_WCHAR
48 #endif
49 #endif
50
51 static struct termp *ascii_init(enum termenc, char *);
52 static double ascii_hspan(const struct termp *,
53 const struct roffsu *);
54 static size_t ascii_width(const struct termp *, int);
55 static void ascii_advance(struct termp *, size_t);
56 static void ascii_begin(struct termp *);
57 static void ascii_end(struct termp *);
58 static void ascii_endline(struct termp *);
59 static void ascii_letter(struct termp *, int);
60
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
68 static struct termp *
69 ascii_init(enum termenc enc, char *outopts)
70 {
71 const char *toks[4];
72 char *v;
73 struct termp *p;
74
75 p = mandoc_calloc(1, sizeof(struct termp));
76
77 p->tabwidth = 5;
78 p->defrmargin = 78;
79
80 p->begin = ascii_begin;
81 p->end = ascii_end;
82 p->hspan = ascii_hspan;
83 p->type = TERMTYPE_CHAR;
84
85 p->enc = TERMENC_ASCII;
86 p->advance = ascii_advance;
87 p->endline = ascii_endline;
88 p->letter = ascii_letter;
89 p->width = ascii_width;
90
91 #ifdef USE_WCHAR
92 if (TERMENC_ASCII != enc) {
93 v = TERMENC_LOCALE == enc ?
94 setlocale(LC_ALL, "") :
95 setlocale(LC_CTYPE, "en_US.UTF-8");
96 if (NULL != v && MB_CUR_MAX > 1) {
97 p->enc = enc;
98 p->advance = locale_advance;
99 p->endline = locale_endline;
100 p->letter = locale_letter;
101 p->width = locale_width;
102 }
103 }
104 #endif
105
106 toks[0] = "indent";
107 toks[1] = "width";
108 toks[2] = "mdoc";
109 toks[3] = NULL;
110
111 while (outopts && *outopts)
112 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
113 case (0):
114 p->defindent = (size_t)atoi(v);
115 break;
116 case (1):
117 p->defrmargin = (size_t)atoi(v);
118 break;
119 case (2):
120 /*
121 * Temporary, undocumented mode
122 * to imitate mdoc(7) output style.
123 */
124 p->mdocstyle = 1;
125 p->defindent = 5;
126 break;
127 default:
128 break;
129 }
130
131 /* Enforce a lower boundary. */
132 if (p->defrmargin < 58)
133 p->defrmargin = 58;
134
135 return(p);
136 }
137
138 void *
139 ascii_alloc(char *outopts)
140 {
141
142 return(ascii_init(TERMENC_ASCII, outopts));
143 }
144
145 void *
146 utf8_alloc(char *outopts)
147 {
148
149 return(ascii_init(TERMENC_UTF8, outopts));
150 }
151
152
153 void *
154 locale_alloc(char *outopts)
155 {
156
157 return(ascii_init(TERMENC_LOCALE, outopts));
158 }
159
160 /* ARGSUSED */
161 static size_t
162 ascii_width(const struct termp *p, int c)
163 {
164
165 return(1);
166 }
167
168 void
169 ascii_free(void *arg)
170 {
171
172 term_free((struct termp *)arg);
173 }
174
175 /* ARGSUSED */
176 static void
177 ascii_letter(struct termp *p, int c)
178 {
179
180 putchar(c);
181 }
182
183 static void
184 ascii_begin(struct termp *p)
185 {
186
187 (*p->headf)(p, p->argf);
188 }
189
190 static void
191 ascii_end(struct termp *p)
192 {
193
194 (*p->footf)(p, p->argf);
195 }
196
197 /* ARGSUSED */
198 static void
199 ascii_endline(struct termp *p)
200 {
201
202 putchar('\n');
203 }
204
205 /* ARGSUSED */
206 static void
207 ascii_advance(struct termp *p, size_t len)
208 {
209 size_t i;
210
211 for (i = 0; i < len; i++)
212 putchar(' ');
213 }
214
215 /* ARGSUSED */
216 static double
217 ascii_hspan(const struct termp *p, const struct roffsu *su)
218 {
219 double r;
220
221 /*
222 * Approximate based on character width. These are generated
223 * entirely by eyeballing the screen, but appear to be correct.
224 */
225
226 switch (su->unit) {
227 case (SCALE_CM):
228 r = 4 * su->scale;
229 break;
230 case (SCALE_IN):
231 r = 10 * su->scale;
232 break;
233 case (SCALE_PC):
234 r = (10 * su->scale) / 6;
235 break;
236 case (SCALE_PT):
237 r = (10 * su->scale) / 72;
238 break;
239 case (SCALE_MM):
240 r = su->scale / 1000;
241 break;
242 case (SCALE_VS):
243 r = su->scale * 2 - 1;
244 break;
245 default:
246 r = su->scale;
247 break;
248 }
249
250 return(r);
251 }
252
253 #ifdef USE_WCHAR
254 /* ARGSUSED */
255 static size_t
256 locale_width(const struct termp *p, int c)
257 {
258 int rc;
259
260 return((rc = wcwidth(c)) < 0 ? 0 : rc);
261 }
262
263 /* ARGSUSED */
264 static void
265 locale_advance(struct termp *p, size_t len)
266 {
267 size_t i;
268
269 for (i = 0; i < len; i++)
270 putwchar(L' ');
271 }
272
273 /* ARGSUSED */
274 static void
275 locale_endline(struct termp *p)
276 {
277
278 putwchar(L'\n');
279 }
280
281 /* ARGSUSED */
282 static void
283 locale_letter(struct termp *p, int c)
284 {
285
286 putwchar(c);
287 }
288 #endif