From e1dff04f50833437c47cf1b737e69d3a73de9d63 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Tue, 22 Oct 2013 14:38:28 +0200
Subject: Make CUD more usual

Whether CUD scrolls the screen or not is implementation-dependant.
Applications are not supposed to assume one way or the other, but they
sometimes do, and most implementations do scroll, so let's stick to common
practice.

* console/display.c (handle_esc_bracket): On CUD/VPR, scroll the screen
instead of capping the cursor position.
---
 console/display.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'console')

diff --git a/console/display.c b/console/display.c
index 97e16264..8d9e4786 100644
--- a/console/display.c
+++ b/console/display.c
@@ -1186,8 +1186,9 @@ handle_esc_bracket (display_t display, char op)
     case 'B':		/* ECMA-48 <CUD>.  */
     case 'e':		/* ECMA-48 <VPR>.  */
       /* Cursor down: <cud1>, <cud>.  */
-      user->cursor.row += (parse->params[0] ?: 1);
-      limit_cursor (display);
+      /* Most implementations scroll the screen.  */
+      for (i = 0; i < (parse->params[0] ?: 1); i++)
+	linefeed (display);
       break;
     case 'C':		/* ECMA-48 <CUF>.  */
       /* Cursor right: <cuf1>, <cuf>.  */
-- 
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