scripts/kconfig/lxdialog/inputbox.c

   1 /*
   2  *  inputbox.c -- implements the input box
   3  *
   4  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
   5  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
   6  *
   7  *  This program is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU General Public License
   9  *  as published by the Free Software Foundation; either version 2
  10  *  of the License, or (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include "dialog.h"
  23
  24 char dialog_input_result[MAX_LEN + 1];
  25
  26 /*
  27  *  Print the termination buttons
  28  */
  29 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  30 {
  31         int x = width / 2 - 11;
  32         int y = height - 2;
  33
  34         print_button(dialog, "  Ok  ", y, x, selected == 0);
  35         print_button(dialog, " Help ", y, x + 14, selected == 1);
  36
  37         wmove(dialog, y, x + 1 + 14 * selected);
  38         wrefresh(dialog);
  39 }
  40
  41 /*
  42  * Display a dialog box for inputing a string
  43  */
  44 int dialog_inputbox(const char *title, const char *prompt, int height, int width,
  45                     const char *init)
  46 {
  47         int i, x, y, box_y, box_x, box_width;
  48         int input_x = 0, scroll = 0, key = 0, button = -1;
  49         char *instr = dialog_input_result;
  50         WINDOW *dialog;
  51
  52         /* center dialog box on screen */
  53         x = (COLS - width) / 2;
  54         y = (LINES - height) / 2;
  55
  56         draw_shadow(stdscr, y, x, height, width);
  57
  58         dialog = newwin(height, width, y, x);
  59         keypad(dialog, TRUE);
  60
  61         draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
  62         wattrset(dialog, border_attr);
  63         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
  64         for (i = 0; i < width - 2; i++)
  65                 waddch(dialog, ACS_HLINE);
  66         wattrset(dialog, dialog_attr);
  67         waddch(dialog, ACS_RTEE);
  68
  69         print_title(dialog, title, width);
  70
  71         wattrset(dialog, dialog_attr);
  72         print_autowrap(dialog, prompt, width - 2, 1, 3);
  73
  74         /* Draw the input field box */
  75         box_width = width - 6;
  76         getyx(dialog, y, x);
  77         box_y = y + 2;
  78         box_x = (width - box_width) / 2;
  79         draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2, border_attr, dialog_attr);
  80
  81         print_buttons(dialog, height, width, 0);
  82
  83         /* Set up the initial value */
  84         wmove(dialog, box_y, box_x);
  85         wattrset(dialog, inputbox_attr);
  86
  87         if (!init)
  88                 instr[0] = '\0';
  89         else
  90                 strcpy(instr, init);
  91
  92         input_x = strlen(instr);
  93
  94         if (input_x >= box_width) {
  95                 scroll = input_x - box_width + 1;
  96                 input_x = box_width - 1;
  97                 for (i = 0; i < box_width - 1; i++)
  98                         waddch(dialog, instr[scroll + i]);
  99         } else {
 100                 waddstr(dialog, instr);
 101         }
 102
 103         wmove(dialog, box_y, box_x + input_x);
 104
 105         wrefresh(dialog);
 106
 107         while (key != ESC) {
 108                 key = wgetch(dialog);
 109
 110                 if (button == -1) {     /* Input box selected */
 111                         switch (key) {
 112                         case TAB:
 113                         case KEY_UP:
 114                         case KEY_DOWN:
 115                                 break;
 116                         case KEY_LEFT:
 117                                 continue;
 118                         case KEY_RIGHT:
 119                                 continue;
 120                         case KEY_BACKSPACE:
 121                         case 127:
 122                                 if (input_x || scroll) {
 123                                         wattrset(dialog, inputbox_attr);
 124                                         if (!input_x) {
 125                                                 scroll = scroll < box_width - 1 ? 0 : scroll - (box_width - 1);
 126                                                 wmove(dialog, box_y, box_x);
 127                                                 for (i = 0; i < box_width; i++)
 128                                                         waddch(dialog,
 129                                                                instr[scroll + input_x + i] ?
 130                                                                instr[scroll + input_x + i] : ' ');
 131                                                 input_x = strlen(instr) - scroll;
 132                                         } else
 133                                                 input_x--;
 134                                         instr[scroll + input_x] = '\0';
 135                                         mvwaddch(dialog, box_y, input_x + box_x, ' ');
 136                                         wmove(dialog, box_y, input_x + box_x);
 137                                         wrefresh(dialog);
 138                                 }
 139                                 continue;
 140                         default:
 141                                 if (key < 0x100 && isprint(key)) {
 142                                         if (scroll + input_x < MAX_LEN) {
 143                                                 wattrset(dialog, inputbox_attr);
 144                                                 instr[scroll + input_x] = key;
 145                                                 instr[scroll + input_x + 1] = '\0';
 146                                                 if (input_x == box_width - 1) {
 147                                                         scroll++;
 148                                                         wmove(dialog, box_y, box_x);
 149                                                         for (i = 0; i < box_width - 1; i++)
 150                                                                 waddch(dialog, instr [scroll + i]);
 151                                                 } else {
 152                                                         wmove(dialog, box_y, input_x++ + box_x);
 153                                                         waddch(dialog, key);
 154                                                 }
 155                                                 wrefresh(dialog);
 156                                         } else
 157                                                 flash();        /* Alarm user about overflow */
 158                                         continue;
 159                                 }
 160                         }
 161                 }
 162                 switch (key) {
 163                 case 'O':
 164                 case 'o':
 165                         delwin(dialog);
 166                         return 0;
 167                 case 'H':
 168                 case 'h':
 169                         delwin(dialog);
 170                         return 1;
 171                 case KEY_UP:
 172                 case KEY_LEFT:
 173                         switch (button) {
 174                         case -1:
 175                                 button = 1;     /* Indicates "Cancel" button is selected */
 176                                 print_buttons(dialog, height, width, 1);
 177                                 break;
 178                         case 0:
 179                                 button = -1;    /* Indicates input box is selected */
 180                                 print_buttons(dialog, height, width, 0);
 181                                 wmove(dialog, box_y, box_x + input_x);
 182                                 wrefresh(dialog);
 183                                 break;
 184                         case 1:
 185                                 button = 0;     /* Indicates "OK" button is selected */
 186                                 print_buttons(dialog, height, width, 0);
 187                                 break;
 188                         }
 189                         break;
 190                 case TAB:
 191                 case KEY_DOWN:
 192                 case KEY_RIGHT:
 193                         switch (button) {
 194                         case -1:
 195                                 button = 0;     /* Indicates "OK" button is selected */
 196                                 print_buttons(dialog, height, width, 0);
 197                                 break;
 198                         case 0:
 199                                 button = 1;     /* Indicates "Cancel" button is selected */
 200                                 print_buttons(dialog, height, width, 1);
 201                                 break;
 202                         case 1:
 203                                 button = -1;    /* Indicates input box is selected */
 204                                 print_buttons(dialog, height, width, 0);
 205                                 wmove(dialog, box_y, box_x + input_x);
 206                                 wrefresh(dialog);
 207                                 break;
 208                         }
 209                         break;
 210                 case ' ':
 211                 case '\n':
 212                         delwin(dialog);
 213                         return (button == -1 ? 0 : button);
 214                 case 'X':
 215                 case 'x':
 216                         key = ESC;
 217                 case ESC:
 218                         break;
 219                 }
 220         }
 221
 222         delwin(dialog);
 223         return -1;              /* ESC pressed */
 224 }