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/*
* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <string.h>
#include <assert.h>
#include <ipxe/ansicol.h>
#include <ipxe/editbox.h>
/** @file
*
* Editable text box widget
*
*/
#define EDITBOX_MIN_CHARS 3
/**
* Draw text box widget
*
* @v widget Text widget
*/
static void draw_editbox ( struct widget *widget ) {
struct edit_box *box = container_of ( widget, struct edit_box, widget );
const char *content = *(box->string.buf);
size_t width = widget->width;
char buf[ width + 1 ];
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 );
underflow = ( EDITBOX_MIN_CHARS - cursor_offset );
overflow = ( cursor_offset - ( width - 1 ) );
first = box->first;
if ( underflow > 0 ) {
first -= underflow;
if ( first < 0 )
first = 0;
} else if ( overflow > 0 ) {
first += overflow;
}
box->first = first;
cursor_offset = ( box->string.cursor - first );
/* Construct underscore-padded string portion */
memset ( buf, '_', width );
buf[width] = '\0';
len = ( content ? ( strlen ( content ) - first ) : 0 );
if ( len > width )
len = width;
if ( widget->flags & WIDGET_SECRET ) {
memset ( buf, '*', len );
} else {
memcpy ( buf, ( content + first ), len );
}
/* Print box content and move cursor */
color_set ( CPAIR_EDIT, NULL );
mvprintw ( widget->row, widget->col, "%s", buf );
move ( widget->row, ( widget->col + cursor_offset ) );
color_set ( CPAIR_NORMAL, NULL );
}
/**
* Edit text box widget
*
* @v widget Text widget
* @v key Key pressed by user
* @ret key Key returned to application, or zero
*/
static int edit_editbox ( struct widget *widget, int key ) {
struct edit_box *box = container_of ( widget, struct edit_box, widget );
return edit_string ( &box->string, key );
}
/** Text box widget operations */
struct widget_operations editbox_operations = {
.draw = draw_editbox,
.edit = edit_editbox,
};
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