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vte: implement device status reports (DSR)

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DSRs are used to query the terminal for data. This includes general status
reports but also cursor positions. We currently only implement VT220
features. DEC later introduced further modes to query more advanced
interfaces.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This commit is contained in:
David Herrmann 2012-07-15 11:55:51 +02:00
parent 10d72851bb
commit aa31b1297e
1 changed files with 23 additions and 0 deletions
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23
src/vte.c
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@ -49,6 +49,7 @@
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/keysym.h>
@ -1233,6 +1234,24 @@ static void csi_dev_attr(struct kmscon_vte *vte)
vte->csi_argv[0], vte->csi_argv[1], vte->csi_argv[2]);
}
static void csi_dsr(struct kmscon_vte *vte)
{
char buf[64];
unsigned int x, y, len;
if (vte->csi_argv[0] == 5) {
vte_write(vte, "\e[0n", 4);
} else if (vte->csi_argv[0] == 6) {
x = kmscon_console_get_cursor_x(vte->con);
y = kmscon_console_get_cursor_y(vte->con);
len = snprintf(buf, sizeof(buf), "\e[%u;%uR", x, y);
if (len >= sizeof(buf))
vte_write(vte, "\e[0;0R", 6);
else
vte_write(vte, buf, len);
}
}
static void do_csi(struct kmscon_vte *vte, uint32_t data)
{
int num, x, y, upper, lower;
@ -1415,6 +1434,10 @@ static void do_csi(struct kmscon_vte *vte, uint32_t data)
num = 1;
kmscon_console_tab_right(vte->con, num);
break;
case 'n': /* DSR */
/* device status reports */
csi_dsr(vte);
break;
default:
log_debug("unhandled CSI sequence %c", data);
}