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vi: allow manual screen update if SIGWINCH isn't supported

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On platforms that don't support SIGWINCH vi can be configured
with FEATURE_VI_USE_SIGNALS disabled and FEATURE_VI_WIN_RESIZE
enabled.  This allows the user to force an update with ^L when
the screen is resized.

However, because the SIGWINCH handler hasn't run the virtual
screen buffer won't have been updated and the display becomes
corrupted.  Fix this by calling new_screen() if necessary.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Ron Yorston 2019-03-20 11:00:28 +00:00 committed by Denys Vlasenko
parent 0f5a7f3520
commit a2fd1aaf86
1 changed files with 8 additions and 0 deletions
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8
editors/vi.c
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@ -3349,7 +3349,15 @@ static void refresh(int full_screen)
if (ENABLE_FEATURE_VI_WIN_RESIZE IF_FEATURE_VI_ASK_TERMINAL(&& !G.get_rowcol_error) ) {
unsigned c = columns, r = rows;
query_screen_dimensions();
#if ENABLE_FEATURE_VI_USE_SIGNALS
full_screen |= (c - columns) | (r - rows);
#else
if (c != columns || r != rows) {
full_screen = TRUE;
/* update screen memory since SIGWINCH won't have done it */
new_screen(rows, columns);
}
#endif
}
sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
tp = screenbegin; // index into text[] of top line