1 /* $OpenBSD$ */ 2 3 /* 4 * Copyright (c) 2010 Nicholas Marriott <nicholas.marriott (at) gmail.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 21 #include <stdlib.h> 22 #include <string.h> 23 24 #include "tmux.h" 25 26 /* Table mapping ACS entries to UTF-8. */ 27 struct tty_acs_entry { 28 u_char key; 29 const char *string; 30 }; 31 static const struct tty_acs_entry tty_acs_table[] = { 32 { '+', "\342\206\222" }, /* arrow pointing right */ 33 { ',', "\342\206\220" }, /* arrow pointing left */ 34 { '-', "\342\206\221" }, /* arrow pointing up */ 35 { '.', "\342\206\223" }, /* arrow pointing down */ 36 { '0', "\342\226\256" }, /* solid square block */ 37 { '`', "\342\227\206" }, /* diamond */ 38 { 'a', "\342\226\222" }, /* checker board (stipple) */ 39 { 'b', "\342\220\211" }, 40 { 'c', "\342\220\214" }, 41 { 'd', "\342\220\215" }, 42 { 'e', "\342\220\212" }, 43 { 'f', "\302\260" }, /* degree symbol */ 44 { 'g', "\302\261" }, /* plus/minus */ 45 { 'h', "\342\220\244" }, 46 { 'i', "\342\220\213" }, 47 { 'j', "\342\224\230" }, /* lower right corner */ 48 { 'k', "\342\224\220" }, /* upper right corner */ 49 { 'l', "\342\224\214" }, /* upper left corner */ 50 { 'm', "\342\224\224" }, /* lower left corner */ 51 { 'n', "\342\224\274" }, /* large plus or crossover */ 52 { 'o', "\342\216\272" }, /* scan line 1 */ 53 { 'p', "\342\216\273" }, /* scan line 3 */ 54 { 'q', "\342\224\200" }, /* horizontal line */ 55 { 'r', "\342\216\274" }, /* scan line 7 */ 56 { 's', "\342\216\275" }, /* scan line 9 */ 57 { 't', "\342\224\234" }, /* tee pointing right */ 58 { 'u', "\342\224\244" }, /* tee pointing left */ 59 { 'v', "\342\224\264" }, /* tee pointing up */ 60 { 'w', "\342\224\254" }, /* tee pointing down */ 61 { 'x', "\342\224\202" }, /* vertical line */ 62 { 'y', "\342\211\244" }, /* less-than-or-equal-to */ 63 { 'z', "\342\211\245" }, /* greater-than-or-equal-to */ 64 { '{', "\317\200" }, /* greek pi */ 65 { '|', "\342\211\240" }, /* not-equal */ 66 { '}', "\302\243" }, /* UK pound sign */ 67 { '~', "\302\267" } /* bullet */ 68 }; 69 70 /* Table mapping UTF-8 to ACS entries. */ 71 struct tty_acs_reverse_entry { 72 const char *string; 73 u_char key; 74 }; 75 static const struct tty_acs_reverse_entry tty_acs_reverse2[] = { 76 { "\302\267", '~' } 77 }; 78 static const struct tty_acs_reverse_entry tty_acs_reverse3[] = { 79 { "\342\224\200", 'q' }, 80 { "\342\224\201", 'q' }, 81 { "\342\224\202", 'x' }, 82 { "\342\224\203", 'x' }, 83 { "\342\224\214", 'l' }, 84 { "\342\224\217", 'k' }, 85 { "\342\224\220", 'k' }, 86 { "\342\224\223", 'l' }, 87 { "\342\224\224", 'm' }, 88 { "\342\224\227", 'm' }, 89 { "\342\224\230", 'j' }, 90 { "\342\224\233", 'j' }, 91 { "\342\224\234", 't' }, 92 { "\342\224\243", 't' }, 93 { "\342\224\244", 'u' }, 94 { "\342\224\253", 'u' }, 95 { "\342\224\263", 'w' }, 96 { "\342\224\264", 'v' }, 97 { "\342\224\273", 'v' }, 98 { "\342\224\274", 'n' }, 99 { "\342\225\213", 'n' }, 100 { "\342\225\220", 'q' }, 101 { "\342\225\221", 'x' }, 102 { "\342\225\224", 'l' }, 103 { "\342\225\227", 'k' }, 104 { "\342\225\232", 'm' }, 105 { "\342\225\235", 'j' }, 106 { "\342\225\240", 't' }, 107 { "\342\225\243", 'u' }, 108 { "\342\225\246", 'w' }, 109 { "\342\225\251", 'v' }, 110 { "\342\225\254", 'n' }, 111 }; 112 113 /* UTF-8 double borders. */ 114 static const struct utf8_data tty_acs_double_borders_list[] = { 115 { "", 0, 0, 0 }, 116 { "\342\225\221", 0, 3, 1 }, /* U+2551 */ 117 { "\342\225\220", 0, 3, 1 }, /* U+2550 */ 118 { "\342\225\224", 0, 3, 1 }, /* U+2554 */ 119 { "\342\225\227", 0, 3, 1 }, /* U+2557 */ 120 { "\342\225\232", 0, 3, 1 }, /* U+255A */ 121 { "\342\225\235", 0, 3, 1 }, /* U+255D */ 122 { "\342\225\246", 0, 3, 1 }, /* U+2566 */ 123 { "\342\225\251", 0, 3, 1 }, /* U+2569 */ 124 { "\342\225\240", 0, 3, 1 }, /* U+2560 */ 125 { "\342\225\243", 0, 3, 1 }, /* U+2563 */ 126 { "\342\225\254", 0, 3, 1 }, /* U+256C */ 127 { "\302\267", 0, 2, 1 } /* U+00B7 */ 128 }; 129 130 /* UTF-8 heavy borders. */ 131 static const struct utf8_data tty_acs_heavy_borders_list[] = { 132 { "", 0, 0, 0 }, 133 { "\342\224\203", 0, 3, 1 }, /* U+2503 */ 134 { "\342\224\201", 0, 3, 1 }, /* U+2501 */ 135 { "\342\224\217", 0, 3, 1 }, /* U+250F */ 136 { "\342\224\223", 0, 3, 1 }, /* U+2513 */ 137 { "\342\224\227", 0, 3, 1 }, /* U+2517 */ 138 { "\342\224\233", 0, 3, 1 }, /* U+251B */ 139 { "\342\224\263", 0, 3, 1 }, /* U+2533 */ 140 { "\342\224\273", 0, 3, 1 }, /* U+253B */ 141 { "\342\224\243", 0, 3, 1 }, /* U+2523 */ 142 { "\342\224\253", 0, 3, 1 }, /* U+252B */ 143 { "\342\225\213", 0, 3, 1 }, /* U+254B */ 144 { "\302\267", 0, 2, 1 } /* U+00B7 */ 145 }; 146 147 /* UTF-8 rounded borders. */ 148 static const struct utf8_data tty_acs_rounded_borders_list[] = { 149 { "", 0, 0, 0 }, 150 { "\342\224\202", 0, 3, 1 }, /* U+2502 */ 151 { "\342\224\200", 0, 3, 1 }, /* U+2500 */ 152 { "\342\225\255", 0, 3, 1 }, /* U+256D */ 153 { "\342\225\256", 0, 3, 1 }, /* U+256E */ 154 { "\342\225\260", 0, 3, 1 }, /* U+2570 */ 155 { "\342\225\257", 0, 3, 1 }, /* U+256F */ 156 { "\342\224\263", 0, 3, 1 }, /* U+2533 */ 157 { "\342\224\273", 0, 3, 1 }, /* U+253B */ 158 { "\342\224\234", 0, 3, 1 }, /* U+2524 */ 159 { "\342\224\244", 0, 3, 1 }, /* U+251C */ 160 { "\342\225\213", 0, 3, 1 }, /* U+254B */ 161 { "\302\267", 0, 2, 1 } /* U+00B7 */ 162 }; 163 164 /* Get cell border character for double style. */ 165 const struct utf8_data * 166 tty_acs_double_borders(int cell_type) 167 { 168 return (&tty_acs_double_borders_list[cell_type]); 169 } 170 171 /* Get cell border character for heavy style. */ 172 const struct utf8_data * 173 tty_acs_heavy_borders(int cell_type) 174 { 175 return (&tty_acs_heavy_borders_list[cell_type]); 176 } 177 178 /* Get cell border character for rounded style. */ 179 const struct utf8_data * 180 tty_acs_rounded_borders(int cell_type) 181 { 182 return (&tty_acs_rounded_borders_list[cell_type]); 183 } 184 185 static int 186 tty_acs_cmp(const void *key, const void *value) 187 { 188 const struct tty_acs_entry *entry = value; 189 int test = *(const u_char *)key; 190 191 return (test - entry->key); 192 } 193 194 static int 195 tty_acs_reverse_cmp(const void *key, const void *value) 196 { 197 const struct tty_acs_reverse_entry *entry = value; 198 const char *test = key; 199 200 return (strcmp(test, entry->string)); 201 } 202 203 /* Should this terminal use ACS instead of UTF-8 line drawing? */ 204 int 205 tty_acs_needed(struct tty *tty) 206 { 207 if (tty == NULL) 208 return (0); 209 210 /* 211 * If the U8 flag is present, it marks whether a terminal supports 212 * UTF-8 and ACS together. 213 * 214 * If it is present and zero, we force ACS - this gives users a way to 215 * turn off UTF-8 line drawing. 216 * 217 * If it is nonzero, we can fall through to the default and use UTF-8 218 * line drawing on UTF-8 terminals. 219 */ 220 if (tty_term_has(tty->term, TTYC_U8) && 221 tty_term_number(tty->term, TTYC_U8) == 0) 222 return (1); 223 224 if (tty->client->flags & CLIENT_UTF8) 225 return (0); 226 return (1); 227 } 228 229 /* Retrieve ACS to output as UTF-8. */ 230 const char * 231 tty_acs_get(struct tty *tty, u_char ch) 232 { 233 const struct tty_acs_entry *entry; 234 235 /* Use the ACS set instead of UTF-8 if needed. */ 236 if (tty_acs_needed(tty)) { 237 if (tty->term->acs[ch][0] == '\0') 238 return (NULL); 239 return (&tty->term->acs[ch][0]); 240 } 241 242 /* Otherwise look up the UTF-8 translation. */ 243 entry = bsearch(&ch, tty_acs_table, nitems(tty_acs_table), 244 sizeof tty_acs_table[0], tty_acs_cmp); 245 if (entry == NULL) 246 return (NULL); 247 return (entry->string); 248 } 249 250 /* Reverse UTF-8 into ACS. */ 251 int 252 tty_acs_reverse_get(__unused struct tty *tty, const char *s, size_t slen) 253 { 254 const struct tty_acs_reverse_entry *table, *entry; 255 u_int items; 256 257 if (slen == 2) { 258 table = tty_acs_reverse2; 259 items = nitems(tty_acs_reverse2); 260 } else if (slen == 3) { 261 table = tty_acs_reverse3; 262 items = nitems(tty_acs_reverse3); 263 } else 264 return (-1); 265 entry = bsearch(s, table, items, sizeof table[0], tty_acs_reverse_cmp); 266 if (entry == NULL) 267 return (-1); 268 return (entry->key); 269 } 270
Indexes created Sun Jun 07 00:24:08 UTC 2026