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1ba7f1d03f
it is present and zero. This is useful for users with terminals or fonts that do not correctly support UTF-8 line drawing characters. GitHub issue 927, reported by Hiroaki Yamazoe and Akinori Hattori.
123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2010 Nicholas Marriott <nicholas.marriott@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include "tmux.h"
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static int tty_acs_cmp(const void *, const void *);
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/* Table mapping ACS entries to UTF-8. */
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struct tty_acs_entry {
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u_char key;
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const char *string;
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};
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static const struct tty_acs_entry tty_acs_table[] = {
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{ '+', "\342\206\222" }, /* arrow pointing right */
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{ ',', "\342\206\220" }, /* arrow pointing left */
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{ '-', "\342\206\221" }, /* arrow pointing up */
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{ '.', "\342\206\223" }, /* arrow pointing down */
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{ '0', "\342\226\256" }, /* solid square block */
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{ '`', "\342\227\206" }, /* diamond */
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{ 'a', "\342\226\222" }, /* checker board (stipple) */
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{ 'f', "\302\260" }, /* degree symbol */
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{ 'g', "\302\261" }, /* plus/minus */
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{ 'h', "\342\226\222" }, /* board of squares */
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{ 'i', "\342\230\203" }, /* lantern symbol */
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{ 'j', "\342\224\230" }, /* lower right corner */
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{ 'k', "\342\224\220" }, /* upper right corner */
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{ 'l', "\342\224\214" }, /* upper left corner */
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{ 'm', "\342\224\224" }, /* lower left corner */
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{ 'n', "\342\224\274" }, /* large plus or crossover */
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{ 'o', "\342\216\272" }, /* scan line 1 */
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{ 'p', "\342\216\273" }, /* scan line 3 */
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{ 'q', "\342\224\200" }, /* horizontal line */
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{ 'r', "\342\216\274" }, /* scan line 7 */
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{ 's', "\342\216\275" }, /* scan line 9 */
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{ 't', "\342\224\234" }, /* tee pointing right */
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{ 'u', "\342\224\244" }, /* tee pointing left */
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{ 'v', "\342\224\264" }, /* tee pointing up */
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{ 'w', "\342\224\254" }, /* tee pointing down */
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{ 'x', "\342\224\202" }, /* vertical line */
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{ 'y', "\342\211\244" }, /* less-than-or-equal-to */
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{ 'z', "\342\211\245" }, /* greater-than-or-equal-to */
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{ '{', "\317\200" }, /* greek pi */
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{ '|', "\342\211\240" }, /* not-equal */
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{ '}', "\302\243" }, /* UK pound sign */
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{ '~', "\302\267" } /* bullet */
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};
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static int
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tty_acs_cmp(const void *key, const void *value)
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{
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const struct tty_acs_entry *entry = value;
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u_char ch;
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ch = *(u_char *) key;
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return (ch - entry->key);
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}
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/* Should this terminal use ACS instead of UTF-8 line drawing? */
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int
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tty_acs_needed(struct tty *tty)
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{
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if (tty == NULL)
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return (0);
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/*
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* If the U8 flag is present, it marks whether a terminal supports
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* UTF-8 and ACS together.
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*
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* If it is present and zero, we force ACS - this gives users a way to
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* turn off UTF-8 line drawing.
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*
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* If it is nonzero, we can fall through to the default and use UTF-8
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* line drawing on UTF-8 terminals.
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*/
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if (tty_term_has(tty->term, TTYC_U8) &&
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tty_term_number(tty->term, TTYC_U8) == 0)
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return (1);
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if (tty->flags & TTY_UTF8)
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return (0);
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return (1);
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}
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/* Retrieve ACS to output as a string. */
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const char *
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tty_acs_get(struct tty *tty, u_char ch)
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{
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struct tty_acs_entry *entry;
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/* Use the ACS set instead of UTF-8 if needed. */
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if (tty_acs_needed(tty)) {
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if (tty->term->acs[ch][0] == '\0')
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return (NULL);
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return (&tty->term->acs[ch][0]);
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}
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/* Otherwise look up the UTF-8 translation. */
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entry = bsearch(&ch, tty_acs_table, nitems(tty_acs_table),
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sizeof tty_acs_table[0], tty_acs_cmp);
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if (entry == NULL)
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return (NULL);
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return (entry->string);
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}
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