Emulate il1, dl1, ich1 to run (albeit slowly) with vt100 feature set.

1 files changed, 8 insertions, 4 deletions

diff --git a/tty.c b/tty.c
index a3aeda5d..84931e78 100644
--- a/tty.c
+++ b/tty.c
@@ -569,12 +569,14 @@ tty_cmd_insertcharacter(struct tty *tty, const struct tty_ctx *ctx)
 	if (tty_term_has(tty->term, TTYC_ICH) ||
 	    tty_term_has(tty->term, TTYC_ICH1))
 		tty_emulate_repeat(tty, TTYC_ICH, TTYC_ICH1, ctx->num);
-	else {
+	else if (tty_term_has(tty->term, TTYC_SMIR) && 
+	    tty_term_has(tty->term, TTYC_RMIR)) {
 		tty_putcode(tty, TTYC_SMIR);
 		for (i = 0; i < ctx->num; i++)
 			tty_putc(tty, ' ');
 		tty_putcode(tty, TTYC_RMIR);
-	}
+	} else
+		tty_draw_line(tty, wp->screen, ctx->ocy, wp->xoff, wp->yoff);
 }
 
 void
@@ -606,7 +608,8 @@ tty_cmd_insertline(struct tty *tty, const struct tty_ctx *ctx)
 	struct screen		*s = wp->screen;
 
  	if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
-	    !tty_term_has(tty->term, TTYC_CSR)) {
+	    !tty_term_has(tty->term, TTYC_CSR) || 
+	    !tty_term_has(tty->term, TTYC_IL1)) {
 		tty_redraw_region(tty, ctx);
 		return;
 	}
@@ -626,7 +629,8 @@ tty_cmd_deleteline(struct tty *tty, const struct tty_ctx *ctx)
 	struct screen		*s = wp->screen;
 
  	if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
-	    !tty_term_has(tty->term, TTYC_CSR)) {
+	    !tty_term_has(tty->term, TTYC_CSR) ||
+	    !tty_term_has(tty->term, TTYC_DL1)) {
 		tty_redraw_region(tty, ctx);
 		return;
 	}