1 |
|
|
/* $OpenBSD: tty-acs.c,v 1.6 2017/05/15 16:44:04 nicm Exp $ */ |
2 |
|
|
|
3 |
|
|
/* |
4 |
|
|
* Copyright (c) 2010 Nicholas Marriott <nicholas.marriott@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 |
|
|
|
23 |
|
|
#include "tmux.h" |
24 |
|
|
|
25 |
|
|
static 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 |
|
|
static 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 |
|
|
static 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 |
|
|
/* Should this terminal use ACS instead of UTF-8 line drawing? */ |
78 |
|
|
int |
79 |
|
|
tty_acs_needed(struct tty *tty) |
80 |
|
|
{ |
81 |
|
|
if (tty == NULL) |
82 |
|
|
return (0); |
83 |
|
|
|
84 |
|
|
/* |
85 |
|
|
* If the U8 flag is present, it marks whether a terminal supports |
86 |
|
|
* UTF-8 and ACS together. |
87 |
|
|
* |
88 |
|
|
* If it is present and zero, we force ACS - this gives users a way to |
89 |
|
|
* turn off UTF-8 line drawing. |
90 |
|
|
* |
91 |
|
|
* If it is nonzero, we can fall through to the default and use UTF-8 |
92 |
|
|
* line drawing on UTF-8 terminals. |
93 |
|
|
*/ |
94 |
|
|
if (tty_term_has(tty->term, TTYC_U8) && |
95 |
|
|
tty_term_number(tty->term, TTYC_U8) == 0) |
96 |
|
|
return (1); |
97 |
|
|
|
98 |
|
|
if (tty->flags & TTY_UTF8) |
99 |
|
|
return (0); |
100 |
|
|
return (1); |
101 |
|
|
} |
102 |
|
|
|
103 |
|
|
/* Retrieve ACS to output as a string. */ |
104 |
|
|
const char * |
105 |
|
|
tty_acs_get(struct tty *tty, u_char ch) |
106 |
|
|
{ |
107 |
|
|
struct tty_acs_entry *entry; |
108 |
|
|
|
109 |
|
|
/* Use the ACS set instead of UTF-8 if needed. */ |
110 |
|
|
if (tty_acs_needed(tty)) { |
111 |
|
|
if (tty->term->acs[ch][0] == '\0') |
112 |
|
|
return (NULL); |
113 |
|
|
return (&tty->term->acs[ch][0]); |
114 |
|
|
} |
115 |
|
|
|
116 |
|
|
/* Otherwise look up the UTF-8 translation. */ |
117 |
|
|
entry = bsearch(&ch, tty_acs_table, nitems(tty_acs_table), |
118 |
|
|
sizeof tty_acs_table[0], tty_acs_cmp); |
119 |
|
|
if (entry == NULL) |
120 |
|
|
return (NULL); |
121 |
|
|
return (entry->string); |
122 |
|
|
} |