1 /* $Id: term_ascii.c,v 1.17 2011/05/20 15:48:22 kristaps Exp $ */ 2 /* 3 * Copyright (c) 2010 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[2]; 72 char *v; 73 struct termp *p; 74 75 p = mandoc_calloc(1, sizeof(struct termp)); 76 p->enc = enc; 77 78 p->tabwidth = 5; 79 p->defrmargin = 78; 80 81 p->begin = ascii_begin; 82 p->end = ascii_end; 83 p->hspan = ascii_hspan; 84 p->type = TERMTYPE_CHAR; 85 86 p->enc = TERMENC_ASCII; 87 p->advance = ascii_advance; 88 p->endline = ascii_endline; 89 p->letter = ascii_letter; 90 p->width = ascii_width; 91 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) { 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 } 104 } 105 #endif 106 107 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); 124 } 125 126 void * 127 ascii_alloc(char *outopts) 128 { 129 130 return(ascii_init(TERMENC_ASCII, outopts)); 131 } 132 133 void * 134 utf8_alloc(char *outopts) 135 { 136 137 return(ascii_init(TERMENC_UTF8, outopts)); 138 } 139 140 141 void * 142 locale_alloc(char *outopts) 143 { 144 145 return(ascii_init(TERMENC_LOCALE, outopts)); 146 } 147 148 /* ARGSUSED */ 149 static size_t 150 ascii_width(const struct termp *p, int c) 151 { 152 153 return(1); 154 } 155 156 void 157 ascii_free(void *arg) 158 { 159 160 term_free((struct termp *)arg); 161 } 162 163 /* ARGSUSED */ 164 static void 165 ascii_letter(struct termp *p, int c) 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 } 202 203 /* ARGSUSED */ 204 static double 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 } 237 238 return(r); 239 } 240 241 #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 277