mudgangster

commit e2e974c201e4d12a2c4f903207d6cc714668911c
parent 00b4d515a6204c571a3bc808b02b836b8a39c002
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Sat,  8 Sep 2018 12:08:55 +0300

Textbox fix

Diffstat:
src/textbox.cc
 | 
4
+++-

1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/textbox.cc b/src/textbox.cc
@@ -34,6 +34,7 @@ static void unpack_style( uint8_t style, int * fg, int * bg, int * bold ) {
 
 void textbox_init( TextBox * tb, size_t scrollback ) {
 	// TODO: this is kinda crap
+	*tb = { };
 	tb->lines = ( TextBox::Line * ) calloc( sizeof( TextBox::Line ), scrollback );
 	tb->num_lines = 1;
 	tb->max_lines = scrollback;
@@ -69,7 +70,8 @@ void textbox_newline( TextBox * tb ) {
 	}
 
 	tb->head++;
-	tb->scroll_offset = min( tb->scroll_offset + 1, tb->num_lines - 1 );
+	if( tb->scroll_offset > 0 )
+		tb->scroll_offset = min( tb->scroll_offset + 1, tb->num_lines - 1 );
 	tb->dirty = true;
 
 	TextBox::Line * line = &tb->lines[ ( tb->head + tb->num_lines ) % tb->max_lines ];