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

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>

1 files changed, 8 insertions, 0 deletions

diff --git a/editors/vi.c b/editors/vi.c
index 5e5e13111..425d14c9c 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -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