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Fix (hopefully) the scrolling logic

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This commit is contained in:
Michael Brown 2006-12-20 03:41:55 +00:00
parent 84a2b886e1
commit c66b99272f
1 changed files with 11 additions and 11 deletions
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22
src/hci/mucurses/widgets/editbox.c
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@ -62,31 +62,31 @@ void init_editbox ( struct edit_box *box, char *buf, size_t len,
void draw_editbox ( struct edit_box *box ) {
size_t width = box->width;
char buf[ width + 1 ];
size_t keep_len;
signed int cursor_offset, underflow, overflow;
signed int cursor_offset, underflow, overflow, first;
size_t len;
/* Adjust starting offset so that cursor remains within box */
cursor_offset = ( box->string.cursor - box->first );
keep_len = strlen ( box->string.buf );
if ( keep_len > EDITBOX_MIN_CHARS )
keep_len = EDITBOX_MIN_CHARS;
underflow = ( keep_len - cursor_offset );
underflow = ( EDITBOX_MIN_CHARS - cursor_offset );
overflow = ( cursor_offset - ( width - 1 ) );
first = box->first;
if ( underflow > 0 ) {
box->first -= underflow;
first -= underflow;
if ( first < 0 )
first = 0;
} else if ( overflow > 0 ) {
box->first += overflow;
first += overflow;
}
cursor_offset = ( box->string.cursor - box->first );
box->first = first;
cursor_offset = ( box->string.cursor - first );
/* Construct underscore-padded string portion */
memset ( buf, '_', width );
buf[width] = '\0';
len = ( strlen ( box->string.buf ) - box->first );
len = ( strlen ( box->string.buf ) - first );
if ( len > width )
len = width;
memcpy ( buf, ( box->string.buf + box->first ), len );
memcpy ( buf, ( box->string.buf + first ), len );
/* Print box content and move cursor */
if ( ! box->win )