tty-acs.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2010 Nicholas Marriott <nicm@users.sourceforge.net>
   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
  23 #include "tmux.h"
  24
  25 int     tty_acs_cmp(const void *, const void *);
  26
  27 /* Table mapping ACS entries to UTF-8. */
  28 struct tty_acs_entry {
  29         u_char           key;
  30         const char      *string;
  31 };
  32 const struct tty_acs_entry tty_acs_table[] = {
  33         { '+', "\342\206\222" },        /* arrow pointing right */
  34         { ',', "\342\206\220" },        /* arrow pointing left */
  35         { '-', "\342\206\221" },        /* arrow pointing up */
  36         { '.', "\342\206\223" },        /* arrow pointing down */
  37         { '0', "\342\226\256" },        /* solid square block */
  38         { '`', "\342\227\206" },        /* diamond */
  39         { 'a', "\342\226\222" },        /* checker board (stipple) */
  40         { 'f', "\302\260" },            /* degree symbol */
  41         { 'g', "\302\261" },            /* plus/minus */
  42         { 'h', "\342\226\222" },        /* board of squares */
  43         { 'i', "\342\230\203" },        /* lantern symbol */
  44         { 'j', "\342\224\230" },        /* lower right corner */
  45         { 'k', "\342\224\220" },        /* upper right corner */
  46         { 'l', "\342\224\214" },        /* upper left corner */
  47         { 'm', "\342\224\224" },        /* lower left corner */
  48         { 'n', "\342\224\274" },        /* large plus or crossover */
  49         { 'o', "\342\216\272" },        /* scan line 1 */
  50         { 'p', "\342\216\273" },        /* scan line 3 */
  51         { 'q', "\342\224\200" },        /* horizontal line */
  52         { 'r', "\342\216\274" },        /* scan line 7 */
  53         { 's', "\342\216\275" },        /* scan line 9 */
  54         { 't', "\342\224\234" },        /* tee pointing right */
  55         { 'u', "\342\224\244" },        /* tee pointing left */
  56         { 'v', "\342\224\264" },        /* tee pointing up */
  57         { 'w', "\342\224\254" },        /* tee pointing down */
  58         { 'x', "\342\224\202" },        /* vertical line */
  59         { 'y', "\342\211\244" },        /* less-than-or-equal-to */
  60         { 'z', "\342\211\245" },        /* greater-than-or-equal-to */
  61         { '{', "\317\200" },            /* greek pi */
  62         { '|', "\342\211\240" },        /* not-equal */
  63         { '}', "\302\243" },            /* UK pound sign */
  64         { '~', "\302\267" }             /* bullet */
  65 };
  66
  67 int
  68 tty_acs_cmp(const void *key, const void *value)
  69 {
  70         const struct tty_acs_entry      *entry = value;
  71         u_char                           ch;
  72
  73         ch = *(u_char *) key;
  74         return (ch - entry->key);
  75 }
  76
  77 /* Retrieve ACS to output as a string. */
  78 const char *
  79 tty_acs_get(struct tty *tty, u_char ch)
  80 {
  81         struct tty_acs_entry *entry;
  82
  83         /* If not a UTF-8 terminal, use the ACS set. */
  84         if (!(tty->flags & TTY_UTF8)) {
  85                 if (tty->term->acs[ch][0] == '\0')
  86                         return (NULL);
  87                 return (&tty->term->acs[ch][0]);
  88         }
  89
  90         /* Otherwise look up the UTF-8 translation. */
  91         entry = bsearch(&ch,
  92             tty_acs_table, nitems(tty_acs_table), sizeof tty_acs_table[0],
  93             tty_acs_cmp);
  94         if (entry == NULL)
  95                 return (NULL);
  96         return (entry->string);
  97 }