From b29415ee6d23c83f35b3a0557032996382a8016c Mon Sep 17 00:00:00 2001
From: =?utf8?q?Kristian=20H=C3=B8gsberg?= <krh@redhat.com>
Date: Mon, 8 Dec 2008 00:16:39 -0500
Subject: [PATCH] Update tail pointer correctly so scrolling works.

---
 terminal.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/terminal.c b/terminal.c
index dc43d6a..6bc6a51 100644
--- a/terminal.c
+++ b/terminal.c
@@ -55,7 +55,7 @@ struct terminal {
 	struct wl_display *display;
 	int resize_scheduled;
 	char *data;
-	int width, height, tail, row, column;
+	int width, height, tail, row, column, total_rows;
 	int fd, master;
 	struct buffer *buffer;
 	GIOChannel *channel;
@@ -149,9 +149,17 @@ terminal_data(struct terminal *terminal, const char *data, size_t length)
 			break;
 		case '\n':
 			terminal->row++;
+			terminal->total_rows++;
 			terminal->column = 0;
 			if (terminal->row == terminal->height)
 				terminal->row = 0;
+			if (terminal->row == terminal->tail && terminal->total_rows > 0) {
+				memset(&terminal->data[terminal->row * (terminal->width + 1)],
+				       0, terminal->width);
+				terminal->tail++;
+			}
+			if (terminal->tail == terminal->height)
+				terminal->tail = 0;
 			break;
 		case '\t':
 			memset(&row[terminal->column], ' ', -terminal->column & 7);
-- 
2.7.4