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* DevNotes: Add entry cgf-000026.

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* fhandler.h (fhandler_console::save_top): Save top of screen coordinates.
* fhandler_console.cc (dev::save_restore): Record top of screen coordinates.
Clear entire buffer when restoring saved buffer and try to position the cursor
on the save relative place on the screen.
This commit is contained in:
Christopher Faylor
2014-04-26 17:38:22 +00:00
parent e1c519b41f
commit 6e06243942
4 changed files with 27 additions and 1 deletions
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9
winsup/cygwin/fhandler_console.cc
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@@ -1466,6 +1466,7 @@ dev_console::save_restore (HANDLE h, char c)
save_buf = (PCHAR_INFO) cmalloc_abort (HEAP_1_BUF, screen_size);
save_cursor = b.dwCursorPosition; /* Remember where we were. */
save_top = b.srWindow.Top;
SMALL_RECT now = {}; /* Read the whole buffer */
now.Bottom = save_bufsize.Y - 1;
@@ -1489,6 +1490,7 @@ dev_console::save_restore (HANDLE h, char c)
now.Bottom = save_bufsize.Y - 1;
now.Right = save_bufsize.X - 1;
/* Restore whole buffer */
clear_screen (h, 0, 0, b.dwSize.X - 1, b.dwSize.Y - 1);
BOOL res = WriteConsoleOutputW (h, save_buf, save_bufsize, cob, &now);
if (!res)
debug_printf ("WriteConsoleOutputW failed, %E");
@@ -1496,9 +1498,14 @@ dev_console::save_restore (HANDLE h, char c)
cfree (save_buf);
save_buf = NULL;
cob.X = 0;
cob.Y = save_top;
/* Temporarily position at top of screen */
if (!SetConsoleCursorPosition (h, cob))
debug_printf ("SetConsoleCursorInfo(%p, cob) failed during restore, %E", h);
/* Position where we were previously */
if (!SetConsoleCursorPosition (h, save_cursor))
debug_printf ("SetConsoleCursorInfo(%p, ...) failed during restore, %E", h);
debug_printf ("SetConsoleCursorInfo(%p, save_cursor) failed during restore, %E", h);
/* Get back correct version of buffer information */
dwEnd.X = dwEnd.Y = 0;
fillin (h);