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Cygwin: console: Add emulation of CSI3J on Win10 1809. 

- This patch add emulation of CSI3J, which is broken in Win10 1809,
  rather than ignoring it as before.
This commit is contained in:
Takashi Yano 2020-02-27 00:33:02 +09:00 committed by Corinna Vinschen
parent 0d7bbc0bc3
commit c13cdfd00e
1 changed files with 17 additions and 2 deletions
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19
winsup/cygwin/fhandler_console.cc
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@ -2102,8 +2102,23 @@ fhandler_console::char_command (char c)
break;
case 'J': /* ED */
wpbuf_put (c);
/* Ignore CSI3J in Win10 1809 because it is broken. */
if (con.args[0] != 3 || !wincap.has_con_broken_csi3j ())
if (con.args[0] == 3 && wincap.has_con_broken_csi3j ())
{ /* Workaround for broken CSI3J in Win10 1809 */
CONSOLE_SCREEN_BUFFER_INFO sbi;
GetConsoleScreenBufferInfo (get_output_handle (), &sbi);
SMALL_RECT r = {0, sbi.srWindow.Top,
(SHORT) (sbi.dwSize.X - 1), (SHORT) (sbi.dwSize.Y - 1)};
CHAR_INFO f = {' ', sbi.wAttributes};
COORD d = {0, 0};
ScrollConsoleScreenBufferA (get_output_handle (),
&r, NULL, d, &f);
SetConsoleCursorPosition (get_output_handle (), d);
d = sbi.dwCursorPosition;
d.Y -= sbi.srWindow.Top;
SetConsoleCursorPosition (get_output_handle (), d);
}
else
/* Just send the sequence */
WriteConsoleA (get_output_handle (), wpbuf, wpixput, &wn, 0);
break;
case 'h': /* DECSET */