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/* $OpenBSD: key-string.c,v 1.25 2014/07/21 10:25:48 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
*
* 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 <string.h>
#include "tmux.h"
int key_string_search_table(const char *);
int key_string_get_modifiers(const char **);
const struct {
const char *string;
int key;
} key_string_table[] = {
/* Function keys. */
{ "F1", KEYC_F1 },
{ "F2", KEYC_F2 },
{ "F3", KEYC_F3 },
{ "F4", KEYC_F4 },
{ "F5", KEYC_F5 },
{ "F6", KEYC_F6 },
{ "F7", KEYC_F7 },
{ "F8", KEYC_F8 },
{ "F9", KEYC_F9 },
{ "F10", KEYC_F10 },
{ "F11", KEYC_F11 },
{ "F12", KEYC_F12 },
{ "IC", KEYC_IC },
{ "DC", KEYC_DC },
{ "Home", KEYC_HOME },
{ "End", KEYC_END },
{ "NPage", KEYC_NPAGE },
{ "PageDown", KEYC_NPAGE },
{ "PgDn", KEYC_NPAGE },
{ "PPage", KEYC_PPAGE },
{ "PageUp", KEYC_PPAGE },
{ "PgUp", KEYC_PPAGE },
{ "Tab", '\011' },
{ "BTab", KEYC_BTAB },
{ "Space", ' ' },
{ "BSpace", KEYC_BSPACE },
{ "Enter", '\r' },
{ "Escape", '\033' },
/* Arrow keys. */
{ "Up", KEYC_UP },
{ "Down", KEYC_DOWN },
{ "Left", KEYC_LEFT },
{ "Right", KEYC_RIGHT },
/* Numeric keypad. */
{ "KP/", KEYC_KP_SLASH },
{ "KP*", KEYC_KP_STAR },
{ "KP-", KEYC_KP_MINUS },
{ "KP7", KEYC_KP_SEVEN },
{ "KP8", KEYC_KP_EIGHT },
{ "KP9", KEYC_KP_NINE },
{ "KP+", KEYC_KP_PLUS },
{ "KP4", KEYC_KP_FOUR },
{ "KP5", KEYC_KP_FIVE },
{ "KP6", KEYC_KP_SIX },
{ "KP1", KEYC_KP_ONE },
{ "KP2", KEYC_KP_TWO },
{ "KP3", KEYC_KP_THREE },
{ "KPEnter", KEYC_KP_ENTER },
{ "KP0", KEYC_KP_ZERO },
{ "KP.", KEYC_KP_PERIOD },
};
/* Find key string in table. */
int
key_string_search_table(const char *string)
{
u_int i;
for (i = 0; i < nitems(key_string_table); i++) {
if (strcasecmp(string, key_string_table[i].string) == 0)
return (key_string_table[i].key);
}
return (KEYC_NONE);
}
/* Find modifiers. */
int
key_string_get_modifiers(const char **string)
{
int modifiers;
modifiers = 0;
while (((*string)[0] != '\0') && (*string)[1] == '-') {
switch ((*string)[0]) {
case 'C':
case 'c':
modifiers |= KEYC_CTRL;
break;
case 'M':
case 'm':
modifiers |= KEYC_ESCAPE;
break;
case 'S':
case 's':
modifiers |= KEYC_SHIFT;
break;
}
*string += 2;
}
return (modifiers);
}
/* Lookup a string and convert to a key value. */
int
key_string_lookup_string(const char *string)
{
static const char *other = "!#()+,-.0123456789:;<=>?'\r\t";
int key, modifiers;
u_short u;
int size;
/* Is this a hexadecimal value? */
if (string[0] == '0' && string[1] == 'x') {
if (sscanf(string + 2, "%hx%n", &u, &size) != 1 || size > 4)
return (KEYC_NONE);
return (u);
}
/* Check for modifiers. */
modifiers = 0;
if (string[0] == '^' && string[1] != '\0') {
modifiers |= KEYC_CTRL;
string++;
}
modifiers |= key_string_get_modifiers(&string);
if (string[0] == '\0')
return (KEYC_NONE);
/* Is this a standard ASCII key? */
if (string[1] == '\0') {
key = (u_char) string[0];
if (key < 32 || key == 127 || key > 255)
return (KEYC_NONE);
} else {
/* Otherwise look the key up in the table. */
key = key_string_search_table(string);
if (key == KEYC_NONE)
return (KEYC_NONE);
}
/* Convert the standard control keys. */
if (key < KEYC_BASE && (modifiers & KEYC_CTRL) && !strchr(other, key)) {
if (key >= 97 && key <= 122)
key -= 96;
else if (key >= 64 && key <= 95)
key -= 64;
else if (key == 32)
key = 0;
else if (key == 63)
key = KEYC_BSPACE;
else
return (KEYC_NONE);
modifiers &= ~KEYC_CTRL;
}
return (key | modifiers);
}
/* Convert a key code into string format, with prefix if necessary. */
const char *
key_string_lookup_key(int key)
{
static char out[24];
char tmp[8];
u_int i;
*out = '\0';
/* Handle no key. */
if (key == KEYC_NONE)
return ("none");
/*
* Special case: display C-@ as C-Space. Could do this below in
* the (key >= 0 && key <= 32), but this way we let it be found
* in key_string_table, for the unlikely chance that we might
* change its name.
*/
if ((key & KEYC_MASK_KEY) == 0)
key = ' ' | KEYC_CTRL | (key & KEYC_MASK_MOD);
/* Fill in the modifiers. */
if (key & KEYC_CTRL)
strlcat(out, "C-", sizeof out);
if (key & KEYC_ESCAPE)
strlcat(out, "M-", sizeof out);
if (key & KEYC_SHIFT)
strlcat(out, "S-", sizeof out);
key &= KEYC_MASK_KEY;
/* Try the key against the string table. */
for (i = 0; i < nitems(key_string_table); i++) {
if (key == key_string_table[i].key)
break;
}
if (i != nitems(key_string_table)) {
strlcat(out, key_string_table[i].string, sizeof out);
return (out);
}
/* Invalid keys are errors. */
if (key == 127 || key > 255)
return (NULL);
/* Check for standard or control key. */
if (key >= 0 && key <= 32) {
if (key == 0 || key > 26)
xsnprintf(tmp, sizeof tmp, "C-%c", 64 + key);
else
xsnprintf(tmp, sizeof tmp, "C-%c", 96 + key);
} else if (key >= 32 && key <= 126) {
tmp[0] = key;
tmp[1] = '\0';
} else if (key >= 128)
xsnprintf(tmp, sizeof tmp, "\\%o", key);
strlcat(out, tmp, sizeof out);
return (out);
}
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