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conhost: Avoid assumption about the exact Unix cursor position after writing to the last column. 

Spotted by Roman Pišl.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50581
Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2021-02-16 20:32:33 +01:00 committed by Alexandre Julliard
parent 22a1485c08
commit 9e97f3513e
1 changed files with 8 additions and 0 deletions
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8
programs/conhost/conhost.c
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@ -195,6 +195,14 @@ static void set_tty_cursor( struct console *console, unsigned int x, unsigned in
else if (!x && y == console->tty_cursor_y) strcpy( buf, "\r" );
else if (y == console->tty_cursor_y)
{
if (console->is_unix && console->tty_cursor_x >= console->active->width)
{
/* Unix will usually have the cursor at width-1 in this case. instead of depending
* on the exact behaviour, move the cursor to the first column and move forward
* from threre. */
tty_write( console, "\r", 1 );
console->tty_cursor_x = 0;
}
if (x + 1 == console->tty_cursor_x) strcpy( buf, "\b" );
else if (x > console->tty_cursor_x) sprintf( buf, "\x1b[%uC", x - console->tty_cursor_x );
else sprintf( buf, "\x1b[%uD", console->tty_cursor_x - x );