[cloud] Allow aws-import script to run on Python 3.6
[ipxe.git] / src / hci / mucurses / widgets / editbox.c
1 /*
2 * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
22 */
23
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25
26 #include <string.h>
27 #include <assert.h>
28 #include <ipxe/editbox.h>
29
30 /** @file
31 *
32 * Editable text box widget
33 *
34 */
35
36 #define EDITBOX_MIN_CHARS 3
37
38 /**
39 * Initialise text box widget
40 *
41 * @v box Editable text box widget
42 * @v buf Text buffer
43 * @v len Size of text buffer
44 * @v win Containing window
45 * @v row Row
46 * @v col Starting column
47 * @v width Width
48 * @v flags Flags
49 */
50 void init_editbox ( struct edit_box *box, char *buf, size_t len,
51 WINDOW *win, unsigned int row, unsigned int col,
52 unsigned int width, unsigned int flags ) {
53 memset ( box, 0, sizeof ( *box ) );
54 init_editstring ( &box->string, buf, len );
55 box->string.cursor = strlen ( buf );
56 box->win = ( win ? win : stdscr );
57 box->row = row;
58 box->col = col;
59 box->width = width;
60 box->flags = flags;
61 }
62
63 /**
64 * Draw text box widget
65 *
66 * @v box Editable text box widget
67 *
68 */
69 void draw_editbox ( struct edit_box *box ) {
70 size_t width = box->width;
71 char buf[ width + 1 ];
72 signed int cursor_offset, underflow, overflow, first;
73 size_t len;
74
75 /* Adjust starting offset so that cursor remains within box */
76 cursor_offset = ( box->string.cursor - box->first );
77 underflow = ( EDITBOX_MIN_CHARS - cursor_offset );
78 overflow = ( cursor_offset - ( width - 1 ) );
79 first = box->first;
80 if ( underflow > 0 ) {
81 first -= underflow;
82 if ( first < 0 )
83 first = 0;
84 } else if ( overflow > 0 ) {
85 first += overflow;
86 }
87 box->first = first;
88 cursor_offset = ( box->string.cursor - first );
89
90 /* Construct underscore-padded string portion */
91 memset ( buf, '_', width );
92 buf[width] = '\0';
93 len = ( strlen ( box->string.buf ) - first );
94 if ( len > width )
95 len = width;
96 if ( box->flags & EDITBOX_STARS ) {
97 memset ( buf, '*', len );
98 } else {
99 memcpy ( buf, ( box->string.buf + first ), len );
100 }
101
102 /* Print box content and move cursor */
103 if ( ! box->win )
104 box->win = stdscr;
105 mvwprintw ( box->win, box->row, box->col, "%s", buf );
106 wmove ( box->win, box->row, ( box->col + cursor_offset ) );
107 }