/* $OpenBSD$ */

/*
* Copyright (c) 2010 Nicholas Marriott <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <sys/types.h>

#include <stdlib.h>
#include <string.h>

#include "tmux.h"

/* Table mapping ACS entries to UTF-8. */
struct tty_acs_entry {
       u_char           key;
       const char      *string;
};
static const struct tty_acs_entry tty_acs_table[] = {
       { '+', "\342\206\222" },        /* arrow pointing right */
       { ',', "\342\206\220" },        /* arrow pointing left */
       { '-', "\342\206\221" },        /* arrow pointing up */
       { '.', "\342\206\223" },        /* arrow pointing down */
       { '0', "\342\226\256" },        /* solid square block */
       { '`', "\342\227\206" },        /* diamond */
       { 'a', "\342\226\222" },        /* checker board (stipple) */
       { 'b', "\342\220\211" },
       { 'c', "\342\220\214" },
       { 'd', "\342\220\215" },
       { 'e', "\342\220\212" },
       { 'f', "\302\260" },            /* degree symbol */
       { 'g', "\302\261" },            /* plus/minus */
       { 'h', "\342\220\244" },
       { 'i', "\342\220\213" },
       { 'j', "\342\224\230" },        /* lower right corner */
       { 'k', "\342\224\220" },        /* upper right corner */
       { 'l', "\342\224\214" },        /* upper left corner */
       { 'm', "\342\224\224" },        /* lower left corner */
       { 'n', "\342\224\274" },        /* large plus or crossover */
       { 'o', "\342\216\272" },        /* scan line 1 */
       { 'p', "\342\216\273" },        /* scan line 3 */
       { 'q', "\342\224\200" },        /* horizontal line */
       { 'r', "\342\216\274" },        /* scan line 7 */
       { 's', "\342\216\275" },        /* scan line 9 */
       { 't', "\342\224\234" },        /* tee pointing right */
       { 'u', "\342\224\244" },        /* tee pointing left */
       { 'v', "\342\224\264" },        /* tee pointing up */
       { 'w', "\342\224\254" },        /* tee pointing down */
       { 'x', "\342\224\202" },        /* vertical line */
       { 'y', "\342\211\244" },        /* less-than-or-equal-to */
       { 'z', "\342\211\245" },        /* greater-than-or-equal-to */
       { '{', "\317\200" },            /* greek pi */
       { '|', "\342\211\240" },        /* not-equal */
       { '}', "\302\243" },            /* UK pound sign */
       { '~', "\302\267" }             /* bullet */
};

/* Table mapping UTF-8 to ACS entries. */
struct tty_acs_reverse_entry {
       const char      *string;
       u_char           key;
};
static const struct tty_acs_reverse_entry tty_acs_reverse2[] = {
       { "\302\267", '~' }
};
static const struct tty_acs_reverse_entry tty_acs_reverse3[] = {
       { "\342\224\200", 'q' },
       { "\342\224\201", 'q' },
       { "\342\224\202", 'x' },
       { "\342\224\203", 'x' },
       { "\342\224\214", 'l' },
       { "\342\224\217", 'k' },
       { "\342\224\220", 'k' },
       { "\342\224\223", 'l' },
       { "\342\224\224", 'm' },
       { "\342\224\227", 'm' },
       { "\342\224\230", 'j' },
       { "\342\224\233", 'j' },
       { "\342\224\234", 't' },
       { "\342\224\243", 't' },
       { "\342\224\244", 'u' },
       { "\342\224\253", 'u' },
       { "\342\224\263", 'w' },
       { "\342\224\264", 'v' },
       { "\342\224\273", 'v' },
       { "\342\224\274", 'n' },
       { "\342\225\213", 'n' },
       { "\342\225\220", 'q' },
       { "\342\225\221", 'x' },
       { "\342\225\224", 'l' },
       { "\342\225\227", 'k' },
       { "\342\225\232", 'm' },
       { "\342\225\235", 'j' },
       { "\342\225\240", 't' },
       { "\342\225\243", 'u' },
       { "\342\225\246", 'w' },
       { "\342\225\251", 'v' },
       { "\342\225\254", 'n' },
};

/* UTF-8 double borders. */
static const struct utf8_data tty_acs_double_borders_list[] = {
       { "", 0, 0, 0 },
       { "\342\225\221", 0, 3, 1 }, /* U+2551 */
       { "\342\225\220", 0, 3, 1 }, /* U+2550 */
       { "\342\225\224", 0, 3, 1 }, /* U+2554 */
       { "\342\225\227", 0, 3, 1 }, /* U+2557 */
       { "\342\225\232", 0, 3, 1 }, /* U+255A */
       { "\342\225\235", 0, 3, 1 }, /* U+255D */
       { "\342\225\246", 0, 3, 1 }, /* U+2566 */
       { "\342\225\251", 0, 3, 1 }, /* U+2569 */
       { "\342\225\240", 0, 3, 1 }, /* U+2560 */
       { "\342\225\243", 0, 3, 1 }, /* U+2563 */
       { "\342\225\254", 0, 3, 1 }, /* U+256C */
       { "\302\267",     0, 2, 1 }  /* U+00B7 */
};

/* UTF-8 heavy borders. */
static const struct utf8_data tty_acs_heavy_borders_list[] = {
       { "", 0, 0, 0 },
       { "\342\224\203", 0, 3, 1 }, /* U+2503 */
       { "\342\224\201", 0, 3, 1 }, /* U+2501 */
       { "\342\224\217", 0, 3, 1 }, /* U+250F */
       { "\342\224\223", 0, 3, 1 }, /* U+2513 */
       { "\342\224\227", 0, 3, 1 }, /* U+2517 */
       { "\342\224\233", 0, 3, 1 }, /* U+251B */
       { "\342\224\263", 0, 3, 1 }, /* U+2533 */
       { "\342\224\273", 0, 3, 1 }, /* U+253B */
       { "\342\224\243", 0, 3, 1 }, /* U+2523 */
       { "\342\224\253", 0, 3, 1 }, /* U+252B */
       { "\342\225\213", 0, 3, 1 }, /* U+254B */
       { "\302\267",     0, 2, 1 }  /* U+00B7 */
};

/* UTF-8 rounded borders. */
static const struct utf8_data tty_acs_rounded_borders_list[] = {
       { "", 0, 0, 0 },
       { "\342\224\202", 0, 3, 1 }, /* U+2502 */
       { "\342\224\200", 0, 3, 1 }, /* U+2500 */
       { "\342\225\255", 0, 3, 1 }, /* U+256D */
       { "\342\225\256", 0, 3, 1 }, /* U+256E */
       { "\342\225\260", 0, 3, 1 }, /* U+2570 */
       { "\342\225\257", 0, 3, 1 }, /* U+256F */
       { "\342\224\263", 0, 3, 1 }, /* U+2533 */
       { "\342\224\273", 0, 3, 1 }, /* U+253B */
       { "\342\224\234", 0, 3, 1 }, /* U+2524 */
       { "\342\224\244", 0, 3, 1 }, /* U+251C */
       { "\342\225\213", 0, 3, 1 }, /* U+254B */
       { "\302\267",     0, 2, 1 }  /* U+00B7 */
};

/* Get cell border character for double style. */
const struct utf8_data *
tty_acs_double_borders(int cell_type)
{
       return (&tty_acs_double_borders_list[cell_type]);
}

/* Get cell border character for heavy style. */
const struct utf8_data *
tty_acs_heavy_borders(int cell_type)
{
       return (&tty_acs_heavy_borders_list[cell_type]);
}

/* Get cell border character for rounded style. */
const struct utf8_data *
tty_acs_rounded_borders(int cell_type)
{
       return (&tty_acs_rounded_borders_list[cell_type]);
}

static int
tty_acs_cmp(const void *key, const void *value)
{
       const struct tty_acs_entry      *entry = value;
       int                              test = *(const u_char *)key;

       return (test - entry->key);
}

static int
tty_acs_reverse_cmp(const void *key, const void *value)
{
       const struct tty_acs_reverse_entry      *entry = value;
       const char                              *test = key;

       return (strcmp(test, entry->string));
}

/* Should this terminal use ACS instead of UTF-8 line drawing? */
int
tty_acs_needed(struct tty *tty)
{
       if (tty == NULL)
               return (0);

       /*
        * If the U8 flag is present, it marks whether a terminal supports
        * UTF-8 and ACS together.
        *
        * If it is present and zero, we force ACS - this gives users a way to
        * turn off UTF-8 line drawing.
        *
        * If it is nonzero, we can fall through to the default and use UTF-8
        * line drawing on UTF-8 terminals.
        */
       if (tty_term_has(tty->term, TTYC_U8) &&
           tty_term_number(tty->term, TTYC_U8) == 0)
               return (1);

       if (tty->client->flags & CLIENT_UTF8)
               return (0);
       return (1);
}

/* Retrieve ACS to output as UTF-8. */
const char *
tty_acs_get(struct tty *tty, u_char ch)
{
       const struct tty_acs_entry      *entry;

       /* Use the ACS set instead of UTF-8 if needed. */
       if (tty_acs_needed(tty)) {
               if (tty->term->acs[ch][0] == '\0')
                       return (NULL);
               return (&tty->term->acs[ch][0]);
       }

       /* Otherwise look up the UTF-8 translation. */
       entry = bsearch(&ch, tty_acs_table, nitems(tty_acs_table),
           sizeof tty_acs_table[0], tty_acs_cmp);
       if (entry == NULL)
               return (NULL);
       return (entry->string);
}

/* Reverse UTF-8 into ACS. */
int
tty_acs_reverse_get(__unused struct tty *tty, const char *s, size_t slen)
{
       const struct tty_acs_reverse_entry      *table, *entry;
       u_int                                    items;

       if (slen == 2) {
               table = tty_acs_reverse2;
               items = nitems(tty_acs_reverse2);
       } else if (slen == 3) {
               table = tty_acs_reverse3;
               items = nitems(tty_acs_reverse3);
       } else
               return (-1);
       entry = bsearch(s, table, items, sizeof table[0], tty_acs_reverse_cmp);
       if (entry == NULL)
               return (-1);
       return (entry->key);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.