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Handle the top bit of xterm(1)-style modifier keys, based on a diff from

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Balazs Kezes.
This commit is contained in:
nicm
2014-05-27 13:04:42 +00:00
parent 7160b8c2d5
commit 193b6bcf36
1 changed files with 46 additions and 33 deletions
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79
xterm-keys.c
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@@ -40,8 +40,8 @@
* We accept any 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);
int xterm_keys_match(const char *, const char *, size_t, size_t *, u_int *);
int xterm_keys_modifiers(const char *, size_t, size_t *, u_int *);
struct xterm_keys_entry {
int key;
@@ -122,49 +122,62 @@ const struct xterm_keys_entry xterm_keys_table[] = {
* 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)
xterm_keys_match(const char *template, const char *buf, size_t len,
size_t *size, u_int *modifiers)
{
size_t pos;
int retval;
if (len == 0)
return (0);
pos = 0;
do {
if (*template == '_' && buf[pos] >= '1' && buf[pos] <= '8')
if (*template == '_') {
retval = xterm_keys_modifiers(buf, len, &pos,
modifiers);
if (retval != 0)
return (retval);
continue;
}
if (buf[pos] != *template)
return (-1);
} while (*++template != '\0' && ++pos != len);
pos++;
} while (*++template != '\0' && pos != len);
if (*template != '\0') /* partial */
return (1);
*size = pos;
return (0);
}
/* Find modifiers based on template. */
/* Find modifiers from buffer. */
int
xterm_keys_modifiers(const char *template, const char *buf, size_t len)
xterm_keys_modifiers(const char *buf, size_t len, size_t *pos, u_int *modifiers)
{
size_t idx;
int param, modifiers;
u_int flags;
idx = strcspn(template, "_");
if (idx >= len)
return (0);
param = buf[idx] - '1';
if (len - *pos < 2)
return (1);
modifiers = 0;
if (param & 1)
modifiers |= KEYC_SHIFT;
if (param & 2)
modifiers |= KEYC_ESCAPE;
if (param & 4)
modifiers |= KEYC_CTRL;
if (param & 8)
modifiers |= KEYC_ESCAPE;
return (modifiers);
if (buf[*pos] < '0' || buf[*pos] > '9')
return (-1);
flags = buf[(*pos)++] - '0';
if (buf[*pos] >= '0' && buf[*pos] <= '9')
flags = (flags * 10) + (buf[(*pos)++] - '0');
flags -= 1;
*modifiers = 0;
if (flags & 1)
*modifiers |= KEYC_SHIFT;
if (flags & 2)
*modifiers |= KEYC_ESCAPE;
if (flags & 4)
*modifiers |= KEYC_CTRL;
if (flags & 8)
*modifiers |= KEYC_ESCAPE;
return (0);
}
/*
@@ -175,19 +188,19 @@ int
xterm_keys_find(const char *buf, size_t len, size_t *size, int *key)
{
const struct xterm_keys_entry *entry;
u_int i;
u_int i, modifiers;
int matched;
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);
}
matched = xterm_keys_match(entry->template, buf, len, size,
&modifiers);
if (matched == -1)
continue;
if (matched == 0)
*key = entry->key | modifiers;
return (matched);
}
return (-1);
}