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/* $OpenBSD: xterm-keys.c,v 1.5 2009/12/03 22:50:10 nicm Exp $ */
/*
* Copyright (c) 2009 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"
/*
* xterm-style function keys append one of the following values before the last
* character:
*
* 2 Shift
* 3 Alt
* 4 Shift + Alt
* 5 Ctrl
* 6 Shift + Ctrl
* 7 Alt + Ctrl
* 8 Shift + Alt + Ctrl
*
* Rather than parsing them, just match against a table.
*
* There are two forms for F1-F4 (\\033O_P or \\033[1;_P). We accept either but
* always output the latter (it comes first in the table).
*/
int xterm_keys_match(const char *, const char *, size_t);
int xterm_keys_modifiers(const char *, const char *, size_t);
struct xterm_keys_entry {
int key;
const char *template;
};
struct xterm_keys_entry xterm_keys_table[] = {
{ KEYC_F1, "\033[1;_P" },
{ KEYC_F1, "\033O_P" },
{ KEYC_F2, "\033[1;_Q" },
{ KEYC_F2, "\033O_Q" },
{ KEYC_F3, "\033[1;_R" },
{ KEYC_F3, "\033O_R" },
{ KEYC_F4, "\033[1;_S" },
{ KEYC_F4, "\033O_S" },
{ KEYC_F5, "\033[15;_~" },
{ KEYC_F6, "\033[17;_~" },
{ KEYC_F7, "\033[18;_~" },
{ KEYC_F8, "\033[19;_~" },
{ KEYC_F9, "\033[20;_~" },
{ KEYC_F10, "\033[21;_~" },
{ KEYC_F11, "\033[23;_~" },
{ KEYC_F12, "\033[24;_~" },
{ KEYC_F13, "\033[25;_~" },
{ KEYC_F14, "\033[26;_~" },
{ KEYC_F15, "\033[28;_~" },
{ KEYC_F16, "\033[29;_~" },
{ KEYC_F17, "\033[31;_~" },
{ KEYC_F18, "\033[32;_~" },
{ KEYC_F19, "\033[33;_~" },
{ KEYC_F20, "\033[34;_~" },
{ KEYC_UP, "\033[1;_A" },
{ KEYC_DOWN, "\033[1;_B" },
{ KEYC_RIGHT, "\033[1;_C" },
{ KEYC_LEFT, "\033[1;_D" },
{ KEYC_HOME, "\033[1;_H" },
{ KEYC_END, "\033[1;_F" },
{ KEYC_PPAGE, "\033[5;_~" },
{ KEYC_NPAGE, "\033[6;_~" },
{ KEYC_IC, "\033[2;_~" },
{ KEYC_DC, "\033[3;_~" },
};
/*
* Match key against buffer, treating _ as a wildcard. Return -1 for no match,
* 0 for match, 1 if the end of the buffer is reached (need more data).
*/
int
xterm_keys_match(const char *template, const char *buf, size_t len)
{
size_t pos;
if (len == 0)
return (0);
pos = 0;
do {
if (*template != '_' && buf[pos] != *template)
return (-1);
} while (pos++ != len && *++template != '\0');
if (*template != '\0') /* partial */
return (1);
return (0);
}
/* Find modifiers based on template. */
int
xterm_keys_modifiers(const char *template, const char *buf, size_t len)
{
size_t idx;
idx = strcspn(template, "_");
if (idx >= len)
return (0);
switch (buf[idx]) {
case '2':
return (KEYC_SHIFT);
case '3':
return (KEYC_ESCAPE);
case '4':
return (KEYC_SHIFT|KEYC_ESCAPE);
case '5':
return (KEYC_CTRL);
case '6':
return (KEYC_SHIFT|KEYC_CTRL);
case '7':
return (KEYC_ESCAPE|KEYC_CTRL);
case '8':
return (KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL);
}
return (0);
}
/*
* Lookup key from a buffer against the table. Returns 0 for found (and the
* key), -1 for not found, 1 for partial match.
*/
int
xterm_keys_find(const char *buf, size_t len, size_t *size, int *key)
{
struct xterm_keys_entry *entry;
u_int i;
for (i = 0; i < nitems(xterm_keys_table); i++) {
entry = &xterm_keys_table[i];
switch (xterm_keys_match(entry->template, buf, len)) {
case 0:
*size = strlen(entry->template);
*key = entry->key;
*key |= xterm_keys_modifiers(entry->template, buf, len);
return (0);
case 1:
return (1);
}
}
return (-1);
}
/* Lookup a key number from the table. */
char *
xterm_keys_lookup(int key)
{
struct xterm_keys_entry *entry;
u_int i;
int modifiers;
char *out;
#define KEY_MODIFIERS(key, modifiers) \
(((key) & (KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL)) == (modifiers))
modifiers = 0;
if (KEY_MODIFIERS(key, KEYC_SHIFT))
modifiers = 2;
else if (KEY_MODIFIERS(key, KEYC_ESCAPE))
modifiers = 3;
else if (KEY_MODIFIERS(key, KEYC_SHIFT|KEYC_ESCAPE))
modifiers = 4;
else if (KEY_MODIFIERS(key, KEYC_CTRL))
modifiers = 5;
else if (KEY_MODIFIERS(key, KEYC_SHIFT|KEYC_CTRL))
modifiers = 6;
else if (KEY_MODIFIERS(key, KEYC_ESCAPE|KEYC_CTRL))
modifiers = 7;
else if (KEY_MODIFIERS(key, KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL))
modifiers = 8;
#undef KEY_MODIFIERS
/*
* If the key has no modifiers, return NULL and let it fall through to
* the normal lookup.
*/
if (modifiers == 0)
return (NULL);
/* Otherwise, find the key in the table. */
key &= ~(KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL);
for (i = 0; i < nitems(xterm_keys_table); i++) {
entry = &xterm_keys_table[i];
if (key == entry->key)
break;
}
if (i == nitems(xterm_keys_table))
return (NULL);
/* Copy the template and replace the modifier. */
out = xstrdup(entry->template);
out[strcspn(out, "_")] = '0' + modifiers;
return (out);
}
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