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Handle the possibility of partial mouse reads, and fix a comment while here.

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This commit is contained in:
Nicholas Marriott
2009-11-26 15:14:03 +00:00
parent d31d4c05cf
commit 9c0147915e
1 changed files with 36 additions and 9 deletions
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45
tty-keys.c
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@@ -418,7 +418,7 @@ tty_keys_find1(struct tty_key *tk, const char *buf, size_t len, size_t *size)
/*
* Process at least one key in the buffer and invoke tty->key_callback. Return
* 1 if there are no further keys, or 0 if there is more in the buffer.
* 0 if there are no further keys, or 1 if there could be more in the buffer.
*/
int
tty_keys_next(struct tty *tty)
@@ -461,12 +461,19 @@ tty_keys_next(struct tty *tty)
}
/* Not found. Is this a mouse key press? */
key = tty_keys_mouse(buf, len, &size, &mouse);
if (key != KEYC_NONE) {
switch (tty_keys_mouse(buf, len, &size, &mouse)) {
case 0: /* yes */
evbuffer_drain(tty->event->input, size);
key = KEYC_MOUSE;
goto handle_key;
case -1: /* no, or not valid */
evbuffer_drain(tty->event->input, size);
return (1);
case 1: /* partial */
goto partial_key;
}
/* Not found. Try to parse a key with an xterm-style modifier. */
key = xterm_keys_find(buf, len, &size);
if (key != KEYC_NONE) {
@@ -560,7 +567,10 @@ tty_keys_callback(unused int fd, unused short events, void *data)
;
}
/* Handle mouse key input. */
/*
* Handle mouse key input. Returns 0 for success, -1 for failure, 1 for partial
* (probably a mouse sequence but need more data).
*/
int
tty_keys_mouse(const char *buf, size_t len, size_t *size, struct mouse_event *m)
{
@@ -569,19 +579,36 @@ tty_keys_mouse(const char *buf, size_t len, size_t *size, struct mouse_event *m)
* buttons, X and Y, all based at 32 with 1,1 top-left.
*/
if (len != 6 || memcmp(buf, "\033[M", 3) != 0)
return (KEYC_NONE);
*size = 0;
if (buf[0] != '\033')
return (-1);
if (len == 1)
return (1);
if (buf[1] != '[')
return (-1);
if (len == 2)
return (1);
if (buf[2] != 'M')
return (-1);
if (len == 3)
return (1);
if (len < 6)
return (1);
*size = 6;
log_debug("mouse input is: %.*s", (int) len, buf);
log_debug("mouse input is: %.6s", buf);
m->b = buf[3];
m->x = buf[4];
m->y = buf[5];
if (m->b < 32 || m->x < 33 || m->y < 33)
return (KEYC_NONE);
return (-1);
m->b -= 32;
m->x -= 33;
m->y -= 33;
return (KEYC_MOUSE);
return (0);
}