mirror of
https://github.com/ipxe/ipxe
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c44a193d0d
Add FILE_LICENCE declarations to almost all files that make up the various standard builds of gPXE.
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <string.h>
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#include <assert.h>
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#include <gpxe/editbox.h>
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/** @file
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*
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* Editable text box widget
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*
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*/
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#define EDITBOX_MIN_CHARS 3
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/**
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* Initialise text box widget
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*
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* @v box Editable text box widget
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* @v buf Text buffer
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* @v len Size of text buffer
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* @v win Containing window
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* @v row Row
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* @v col Starting column
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* @v width Width
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* @v flags Flags
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*/
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void init_editbox ( struct edit_box *box, char *buf, size_t len,
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WINDOW *win, unsigned int row, unsigned int col,
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unsigned int width, unsigned int flags ) {
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memset ( box, 0, sizeof ( *box ) );
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box->string.buf = buf;
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box->string.len = len;
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box->string.cursor = strlen ( buf );
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box->win = ( win ? win : stdscr );
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box->row = row;
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box->col = col;
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box->width = width;
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box->flags = flags;
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}
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/**
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* Draw text box widget
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*
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* @v box Editable text box widget
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*
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*/
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void draw_editbox ( struct edit_box *box ) {
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size_t width = box->width;
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char buf[ width + 1 ];
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signed int cursor_offset, underflow, overflow, first;
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size_t len;
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/* Adjust starting offset so that cursor remains within box */
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cursor_offset = ( box->string.cursor - box->first );
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underflow = ( EDITBOX_MIN_CHARS - cursor_offset );
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overflow = ( cursor_offset - ( width - 1 ) );
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first = box->first;
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if ( underflow > 0 ) {
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first -= underflow;
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if ( first < 0 )
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first = 0;
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} else if ( overflow > 0 ) {
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first += overflow;
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}
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box->first = first;
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cursor_offset = ( box->string.cursor - first );
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/* Construct underscore-padded string portion */
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memset ( buf, '_', width );
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buf[width] = '\0';
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len = ( strlen ( box->string.buf ) - first );
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if ( len > width )
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len = width;
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if ( box->flags & EDITBOX_STARS ) {
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memset ( buf, '*', len );
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} else {
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memcpy ( buf, ( box->string.buf + first ), len );
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}
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/* Print box content and move cursor */
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if ( ! box->win )
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box->win = stdscr;
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mvwprintw ( box->win, box->row, box->col, "%s", buf );
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wmove ( box->win, box->row, ( box->col + cursor_offset ) );
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}
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