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Don't scroll screen until trying to write beyond limits.

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This commit is contained in:
Nicholas Marriott 2007-08-27 11:21:05 +00:00
parent 635edfa7d5
commit 565ba002e9
1 changed files with 7 additions and 6 deletions
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13
screen.c
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@ -1,4 +1,4 @@
/* $Id: screen.c,v 1.6 2007-08-27 10:08:44 nicm Exp $ */
/* $Id: screen.c,v 1.7 2007-08-27 11:21:05 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -621,15 +621,16 @@ screen_sequence(struct screen *s, u_char *ptr)
void
screen_write_character(struct screen *s, u_char ch)
{
if (s->cx > screen_last_x(s)) {
s->cx = 0;
screen_cursor_down_scroll(s, 1);
}
s->grid_data[s->cy][s->cx] = ch;
s->grid_attr[s->cy][s->cx] = s->attr;
s->grid_colr[s->cy][s->cx] = s->colr;
s->cx++;
if (s->cx > screen_last_x(s)) {
s->cx = 0;
screen_cursor_down_scroll(s, 1);
}
}
/* Move cursor up and scroll if necessary. */
@ -647,7 +648,7 @@ screen_cursor_up_scroll(struct screen *s, u_int ny)
void
screen_cursor_down_scroll(struct screen *s, u_int ny)
{
if (screen_last_y(s) - s->cy < ny) {
if (s->cy + ny > screen_last_y(s)) {
screen_scroll_up(s, ny - (screen_last_y(s) - s->cy));
s->cy = screen_last_y(s);
} else