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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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <string.h>
#include <assert.h>
#include <gpxe/editbox.h>
/** @file
*
* Editable text box widget
*
*/
#define EDITBOX_MIN_CHARS 3
/**
* Initialise text box widget
*
* @v box Editable text box widget
* @v buf Text buffer
* @v len Size of text buffer
* @v win Containing window
* @v row Row
* @v col Starting column
* @v width Width
* @v flags Flags
*/
void init_editbox ( struct edit_box *box, char *buf, size_t len,
WINDOW *win, unsigned int row, unsigned int col,
unsigned int width, unsigned int flags ) {
memset ( box, 0, sizeof ( *box ) );
box->string.buf = buf;
box->string.len = len;
box->string.cursor = strlen ( buf );
box->win = ( win ? win : stdscr );
box->row = row;
box->col = col;
box->width = width;
box->flags = flags;
}
/**
* Draw text box widget
*
* @v box Editable text box widget
*
*/
void draw_editbox ( struct edit_box *box ) {
size_t width = box->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 = ( strlen ( box->string.buf ) - first );
if ( len > width )
len = width;
if ( box->flags & EDITBOX_STARS ) {
memset ( buf, '*', len );
} else {
memcpy ( buf, ( box->string.buf + first ), len );
}
/* Print box content and move cursor */
if ( ! box->win )
box->win = stdscr;
mvwprintw ( box->win, box->row, box->col, "%s", buf );
wmove ( box->win, box->row, ( box->col + cursor_offset ) );
}
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