Use EL1 to clear lines when redrawing the leftmost pane, rather than

spaces.

diff --git a/usr.bin/tmux/tty.c b/usr.bin/tmux/tty.c
index dc50a8c..20fe764 100644 (file)
--- a/usr.bin/tmux/tty.c
+++ b/usr.bin/tmux/tty.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tty.c,v 1.258 2017/04/05 10:49:46 nicm Exp $ */
+/* $OpenBSD: tty.c,v 1.259 2017/04/16 20:32:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -693,10 +693,11 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
 {
        struct grid_cell         gc, last;
        u_int                    i, j, sx, width;
-       int                      flags = (tty->flags & TTY_NOCURSOR);
+       int                      flags, cleared = 0;
        char                     buf[512];
        size_t                   len;
 
+       flags = (tty->flags & TTY_NOCURSOR);
        tty->flags |= TTY_NOCURSOR;
        tty_update_mode(tty, tty->mode, s);
 
@@ -709,6 +710,16 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
        if (sx > tty->sx)
                sx = tty->sx;
 
+       if (screen_size_x(s) < tty->sx &&
+           ox == 0 &&
+           sx != screen_size_x(s) &&
+           tty_term_has(tty->term, TTYC_EL1) &&
+           !tty_fake_bce(tty, wp, 8)) {
+               tty_default_attributes(tty, wp, 8);
+               tty_cursor(tty, screen_size_x(s) - 1, oy + py);
+               tty_putcode(tty, TTYC_EL1);
+               cleared = 1;
+       }
        tty_cursor(tty, ox, oy + py);
 
        memcpy(&last, &grid_default_cell, sizeof last);
@@ -763,7 +774,7 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
                tty_putn(tty, buf, len, width);
        }
 
-       if (sx < tty->sx) {
+       if (!cleared && sx < tty->sx) {
                tty_default_attributes(tty, wp, 8);
 
                tty_cursor(tty, ox + sx, oy + py);