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Rewrite key string conversions to be readable and to work properly for

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multiple modifiers.
This commit is contained in:
Nicholas Marriott
2010-04-21 21:17:33 +00:00
parent 67dd5df876
commit 3ae1b82695
1 changed files with 88 additions and 110 deletions
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198
key-string.c
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@@ -23,10 +23,11 @@
#include "tmux.h" #include "tmux.h"
int key_string_search_table(const char *); int key_string_search_table(const char *);
int key_string_get_modifiers(const char **);
struct { struct {
const char *string; const char *string;
int key; int key;
} key_string_table[] = { } key_string_table[] = {
/* Function keys. */ /* Function keys. */
{ "F1", KEYC_F1 }, { "F1", KEYC_F1 },
@@ -100,146 +101,123 @@ key_string_search_table(const char *string)
return (KEYC_NONE); return (KEYC_NONE);
} }
/* Lookup a string and convert to a key value, handling C-/M-/S- prefix. */ /* 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 int
key_string_lookup_string(const char *string) key_string_lookup_string(const char *string)
{ {
int key; int key, modifiers;
const char *ptr;
/* 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') if (string[0] == '\0')
return (KEYC_NONE); return (KEYC_NONE);
if (string[1] == '\0')
return ((u_char) string[0]);
ptr = NULL; /* Is this a standard ASCII key? */
if ((string[0] == 'C' || string[0] == 'c') && string[1] == '-') if (string[1] == '\0') {
ptr = string + 2; key = (u_char) string[0];
else if (string[0] == '^') if (key < 32 || key > 126)
ptr = string + 1;
if (ptr != NULL) {
if (ptr[0] == '\0')
return (KEYC_NONE); return (KEYC_NONE);
/*
* Lookup as a named key. If a function key (>= KEYC_BASE), /* Convert the standard control keys. */
* return it with the ctrl modifier, otherwise fallthrough with if (modifiers & KEYC_CTRL) {
* the key value from the table (eg for C-Space). If not a if (key >= 97 && key <= 122)
* named key, check for single character keys and try that. key -= 96;
*/ else if (key >= 65 && key <= 90)
key = key_string_search_table(ptr); key -= 65;
if (key != KEYC_NONE) { else if (key == 32)
if (key >= KEYC_BASE) key = 0;
return (key | KEYC_CTRL); else if (key == 63)
} else { key = KEYC_BSPACE;
if (ptr[1] != '\0') else
return (KEYC_NONE); return (KEYC_NONE);
key = (u_char) ptr[0]; modifiers &= ~KEYC_CTRL;
} }
/* return (key | modifiers);
* Figure out if the single character in key is a valid ctrl
* key.
*/
if (key == 32)
return (0);
if (key == 63)
return (KEYC_BSPACE);
if (key >= 64 && key <= 95)
return (key - 64);
if (key >= 97 && key <= 122)
return (key - 96);
return (KEYC_NONE);
} }
if ((string[0] == 'M' || string[0] == 'm') && string[1] == '-') { /* Otherwise look the key up in the table. */
ptr = string + 2; key = key_string_search_table(string);
if (ptr[0] == '\0') if (key == KEYC_NONE)
return (KEYC_NONE);
key = key_string_lookup_string(ptr);
if (key != KEYC_NONE) {
if (key >= KEYC_BASE)
return (key | KEYC_ESCAPE);
} else {
if (ptr[1] == '\0')
return (KEYC_NONE);
key = (u_char) ptr[0];
}
if (key >= 32 && key <= 127)
return (key | KEYC_ESCAPE);
return (KEYC_NONE); return (KEYC_NONE);
} return (key | modifiers);
if ((string[0] == 'S' || string[0] == 's') && string[1] == '-') {
ptr = string + 2;
if (ptr[0] == '\0')
return (KEYC_NONE);
key = key_string_lookup_string(ptr);
if (key != KEYC_NONE) {
if (key >= KEYC_BASE)
return (key | KEYC_SHIFT);
} else {
if (ptr[1] == '\0')
return (KEYC_NONE);
key = (u_char) ptr[0];
}
if (key >= 32 && key <= 127)
return (key | KEYC_SHIFT);
return (KEYC_NONE);
}
return (key_string_search_table(string));
} }
/* Convert a key code into string format, with prefix if necessary. */ /* Convert a key code into string format, with prefix if necessary. */
const char * const char *
key_string_lookup_key(int key) key_string_lookup_key(int key)
{ {
static char tmp[24], tmp2[24]; static char out[24];
const char *s; char tmp[8];
u_int i; u_int i;
if (key == 127) *out = '\0';
return (NULL);
if (key & KEYC_ESCAPE) { /* Fill in the modifiers. */
if ((s = key_string_lookup_key(key & ~KEYC_ESCAPE)) == NULL) if (key & KEYC_CTRL)
return (NULL); strlcat(out, "C-", sizeof out);
xsnprintf(tmp2, sizeof tmp2, "M-%s", s); if (key & KEYC_ESCAPE)
return (tmp2); strlcat(out, "M-", sizeof out);
} if (key & KEYC_SHIFT)
if (key & KEYC_CTRL) { strlcat(out, "S-", sizeof out);
if ((s = key_string_lookup_key(key & ~KEYC_CTRL)) == NULL) key &= ~(KEYC_CTRL|KEYC_ESCAPE|KEYC_SHIFT);
return (NULL);
xsnprintf(tmp2, sizeof tmp2, "C-%s", s);
return (tmp2);
}
if (key & KEYC_SHIFT) {
if ((s = key_string_lookup_key(key & ~KEYC_SHIFT)) == NULL)
return (NULL);
xsnprintf(tmp2, sizeof tmp2, "S-%s", s);
return (tmp2);
}
/* Try the key against the string table. */
for (i = 0; i < nitems(key_string_table); i++) { for (i = 0; i < nitems(key_string_table); i++) {
if (key == key_string_table[i].key) if (key == key_string_table[i].key)
return (key_string_table[i].string); break;
}
if (i != nitems(key_string_table)) {
strlcat(out, key_string_table[i].string, sizeof out);
return (out);
} }
if (key >= 32 && key <= 255) { /* Invalid keys are errors. */
tmp[0] = (char) key; if (key >= 127)
tmp[1] = '\0'; return (NULL);
return (tmp);
}
/* Check for standard or control key. */
if (key >= 0 && key <= 32) { if (key >= 0 && key <= 32) {
if (key == 0 || key > 26) if (key == 0 || key > 26)
xsnprintf(tmp, sizeof tmp, "C-%c", 64 + key); xsnprintf(tmp, sizeof tmp, "C-%c", 64 + key);
else else
xsnprintf(tmp, sizeof tmp, "C-%c", 96 + key); xsnprintf(tmp, sizeof tmp, "C-%c", 96 + key);
return (tmp); } else if (key >= 32 && key <= 126) {
tmp[0] = key;
tmp[1] = '\0';
} }
strlcat(out, tmp, sizeof out);
return (NULL); return (out);
} }