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Initial attempt to make use of left and right margins if the terminal

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supports them (that is, if it advertises itself as a VT420 - probably
just xterm). These are the vertical equivalent of the scroll region and
allow much faster scrolling of panes that do not take up the full width
of the terminal.
This commit is contained in:
nicm
2016-11-15 14:02:32 +00:00
parent 9fe43d6acb
commit 0ace779cde
4 changed files with 187 additions and 11 deletions
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94
tty-keys.c
View File

@ -44,6 +44,8 @@ static int tty_keys_next1(struct tty *, const char *, size_t, key_code *,
size_t *, int);
static void tty_keys_callback(int, short, void *);
static int tty_keys_mouse(struct tty *, const char *, size_t, size_t *);
static int tty_keys_device_attributes(struct tty *, const char *, size_t,
size_t *);
/* Default raw keys. */
struct tty_default_key_raw {
@ -537,6 +539,17 @@ tty_keys_next(struct tty *tty)
return (0);
log_debug("keys are %zu (%.*s)", len, (int)len, buf);
/* Is this a device attributes response? */
switch (tty_keys_device_attributes(tty, buf, len, &size)) {
case 0: /* yes */
key = KEYC_UNKNOWN;
goto complete_key;
case -1: /* no, or not valid */
break;
case 1: /* partial */
goto partial_key;
}
/* Is this a mouse key press? */
switch (tty_keys_mouse(tty, buf, len, &size)) {
case 0: /* yes */
@ -815,3 +828,84 @@ tty_keys_mouse(struct tty *tty, const char *buf, size_t len, size_t *size)
return (0);
}
/*
* Handle device attributes input. Returns 0 for success, -1 for failure, 1 for
* partial.
*/
static int
tty_keys_device_attributes(struct tty *tty, const char *buf, size_t len,
size_t *size)
{
u_int i, a, b;
char tmp[64], *endptr;
const char *s;
*size = 0;
/* First three bytes are always \033[?. */
if (buf[0] != '\033')
return (-1);
if (len == 1)
return (1);
if (buf[1] != '[')
return (-1);
if (len == 2)
return (1);
if (buf[2] != '?')
return (-1);
if (len == 3)
return (1);
/* Copy the rest up to a 'c'. */
for (i = 0; i < (sizeof tmp) - 1 && buf[3 + i] != 'c'; i++) {
if (3 + i == len)
return (1);
tmp[i] = buf[3 + i];
}
if (i == (sizeof tmp) - 1)
return (-1);
tmp[i] = '\0';
*size = 4 + i;
/* Convert version numbers. */
a = strtoul(tmp, &endptr, 10);
if (*endptr == ';') {
b = strtoul(endptr + 1, &endptr, 10);
if (*endptr != '\0' && *endptr != ';')
b = 0;
} else
a = b = 0;
s = "UNKNOWN";
switch (a) {
case 1:
if (b == 2) {
tty_set_type(tty, TTY_VT100);
s = "VT100";
} else if (b == 0) {
tty_set_type(tty, TTY_VT101);
s = "VT101";
}
break;
case 6:
tty_set_type(tty, TTY_VT102);
s = "VT102";
break;
case 62:
tty_set_type(tty, TTY_VT220);
s = "VT220";
break;
case 63:
tty_set_type(tty, TTY_VT320);
s = "VT320";
break;
case 64:
tty_set_type(tty, TTY_VT420);
s = "VT420";
break;
}
log_debug("received DA %.*s (%s)", (int)*size, buf, s);
return (0);
}