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Fix console clear screen in case of partial scrolling

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Commit d7586cb incorrectly checked only for the new cursor position
beyond the old cursor position to decide if we have to correct for user
scrolling.  Since this situation is handled just fine if the cursor is
still visible, only perform the subsequent correction if the cursor is
not in the visible console window.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2016-08-01 12:35:51 +02:00
parent 11dcf9cb5c
commit 05847ad6e9
1 changed files with 2 additions and 2 deletions
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4
winsup/cygwin/fhandler_console.cc
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@ -1288,8 +1288,8 @@ fhandler_console::clear_screen (cltype xc1, cltype yc1, cltype xc2, cltype yc2)
/* Make correction for the following situation: The console buffer
is only partially used and the user scrolled down into the as yet
unused area. */
if (oldEndY < con.dwEnd.Y)
unused area so far that the cursor is outside the window buffer. */
if (oldEndY < con.dwEnd.Y && oldEndY < con.b.srWindow.Top)
{
con.dwEnd.Y = con.b.dwCursorPosition.Y = oldEndY;
y1 = con.b.srWindow.Top;