src/hci/tui/login_ui.c

   1 /*
   2  * Copyright (C) 2009 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 FILE_LICENCE ( GPL2_OR_LATER );
  20
  21 /** @file
  22  *
  23  * Login UI
  24  *
  25  */
  26
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <curses.h>
  30 #include <console.h>
  31 #include <gpxe/settings.h>
  32 #include <gpxe/editbox.h>
  33 #include <gpxe/keys.h>
  34 #include <gpxe/login_ui.h>
  35
  36 /* Colour pairs */
  37 #define CPAIR_NORMAL            1
  38 #define CPAIR_LABEL             2
  39 #define CPAIR_EDITBOX           3
  40
  41 /* Screen layout */
  42 #define USERNAME_LABEL_ROW      8
  43 #define USERNAME_ROW            10
  44 #define PASSWORD_LABEL_ROW      14
  45 #define PASSWORD_ROW            16
  46 #define LABEL_COL               36
  47 #define EDITBOX_COL             30
  48 #define EDITBOX_WIDTH           20
  49
  50 int login_ui ( void ) {
  51         char username[64];
  52         char password[64];
  53         struct edit_box username_box;
  54         struct edit_box password_box;
  55         struct edit_box *current_box = &username_box;
  56         int key;
  57         int rc = -EINPROGRESS;
  58
  59         /* Fetch current setting values */
  60         fetch_string_setting ( NULL, &username_setting, username,
  61                                sizeof ( username ) );
  62         fetch_string_setting ( NULL, &password_setting, password,
  63                                sizeof ( password ) );
  64
  65         /* Initialise UI */
  66         initscr();
  67         start_color();
  68         init_pair ( CPAIR_NORMAL, COLOR_WHITE, COLOR_BLACK );
  69         init_pair ( CPAIR_LABEL, COLOR_WHITE, COLOR_BLACK );
  70         init_pair ( CPAIR_EDITBOX, COLOR_WHITE, COLOR_BLUE );
  71         init_editbox ( &username_box, username, sizeof ( username ), NULL,
  72                        USERNAME_ROW, EDITBOX_COL, EDITBOX_WIDTH, 0 );
  73         init_editbox ( &password_box, password, sizeof ( password ), NULL,
  74                        PASSWORD_ROW, EDITBOX_COL, EDITBOX_WIDTH,
  75                        EDITBOX_STARS );
  76
  77         /* Draw initial UI */
  78         erase();
  79         color_set ( CPAIR_LABEL, NULL );
  80         mvprintw ( USERNAME_LABEL_ROW, LABEL_COL, "Username:" );
  81         mvprintw ( PASSWORD_LABEL_ROW, LABEL_COL, "Password:" );
  82         color_set ( CPAIR_EDITBOX, NULL );
  83         draw_editbox ( &username_box );
  84         draw_editbox ( &password_box );
  85
  86         /* Main loop */
  87         while ( rc == -EINPROGRESS ) {
  88
  89                 draw_editbox ( current_box );
  90
  91                 key = getkey();
  92                 switch ( key ) {
  93                 case KEY_DOWN:
  94                         current_box = &password_box;
  95                         break;
  96                 case KEY_UP:
  97                         current_box = &username_box;
  98                         break;
  99                 case TAB:
 100                         current_box = ( ( current_box == &username_box ) ?
 101                                         &password_box : &username_box );
 102                         break;
 103                 case KEY_ENTER:
 104                         if ( current_box == &username_box ) {
 105                                 current_box = &password_box;
 106                         } else {
 107                                 rc = 0;
 108                         }
 109                         break;
 110                 case CTRL_C:
 111                 case ESC:
 112                         rc = -ECANCELED;
 113                         break;
 114                 default:
 115                         edit_editbox ( current_box, key );
 116                         break;
 117                 }
 118         }
 119
 120         /* Terminate UI */
 121         color_set ( CPAIR_NORMAL, NULL );
 122         erase();
 123         endwin();
 124
 125         if ( rc != 0 )
 126                 return rc;
 127
 128         /* Store settings */
 129         if ( ( rc = store_setting ( NULL, &username_setting, username,
 130                                     strlen ( username ) ) ) != 0 )
 131                 return rc;
 132         if ( ( rc = store_setting ( NULL, &password_setting, password,
 133                                     strlen ( password ) ) ) != 0 )
 134                 return rc;
 135
 136         return 0;
 137 }