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,
  62                  dlg.dialog.atr, dlg.border.atr);
  63         wattrset(dialog, dlg.border.atr);
  64         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
  65         for (i = 0; i < width - 2; i++)
  66                 waddch(dialog, ACS_HLINE);
  67         wattrset(dialog, dlg.dialog.atr);
  68         waddch(dialog, ACS_RTEE);
  69
  70         print_title(dialog, title, width);
  71
  72         wattrset(dialog, dlg.dialog.atr);
  73         print_autowrap(dialog, prompt, width - 2, 1, 3);
  74
  75         /* Draw the input field box */
  76         box_width = width - 6;
  77         getyx(dialog, y, x);
  78         box_y = y + 2;
  79         box_x = (width - box_width) / 2;
  80         draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
  81                  dlg.border.atr, dlg.dialog.atr);
  82
  83         print_buttons(dialog, height, width, 0);
  84
  85         /* Set up the initial value */
  86         wmove(dialog, box_y, box_x);
  87         wattrset(dialog, dlg.inputbox.atr);
  88
  89         if (!init)
  90                 instr[0] = '\0';
  91         else
  92                 strcpy(instr, init);
  93
  94         input_x = strlen(instr);
  95
  96         if (input_x >= box_width) {
  97                 scroll = input_x - box_width + 1;
  98                 input_x = box_width - 1;
  99                 for (i = 0; i < box_width - 1; i++)
 100                         waddch(dialog, instr[scroll + i]);
 101         } else {
 102                 waddstr(dialog, instr);
 103         }
 104
 105         wmove(dialog, box_y, box_x + input_x);
 106
 107         wrefresh(dialog);
 108
 109         while (key != ESC) {
 110                 key = wgetch(dialog);
 111
 112                 if (button == -1) {     /* Input box selected */
 113                         switch (key) {
 114                         case TAB:
 115                         case KEY_UP:
 116                         case KEY_DOWN:
 117                                 break;
 118                         case KEY_LEFT:
 119                                 continue;
 120                         case KEY_RIGHT:
 121                                 continue;
 122                         case KEY_BACKSPACE:
 123                         case 127:
 124                                 if (input_x || scroll) {
 125                                         wattrset(dialog, dlg.inputbox.atr);
 126                                         if (!input_x) {
 127                                                 scroll = scroll < box_width - 1 ? 0 : scroll - (box_width - 1);
 128                                                 wmove(dialog, box_y, box_x);
 129                                                 for (i = 0; i < box_width; i++)
 130                                                         waddch(dialog,
 131                                                                instr[scroll + input_x + i] ?
 132                                                                instr[scroll + input_x + i] : ' ');
 133                                                 input_x = strlen(instr) - scroll;
 134                                         } else
 135                                                 input_x--;
 136                                         instr[scroll + input_x] = '\0';
 137                                         mvwaddch(dialog, box_y, input_x + box_x, ' ');
 138                                         wmove(dialog, box_y, input_x + box_x);
 139                                         wrefresh(dialog);
 140                                 }
 141                                 continue;
 142                         default:
 143                                 if (key < 0x100 && isprint(key)) {
 144                                         if (scroll + input_x < MAX_LEN) {
 145                                                 wattrset(dialog, dlg.inputbox.atr);
 146                                                 instr[scroll + input_x] = key;
 147                                                 instr[scroll + input_x + 1] = '\0';
 148                                                 if (input_x == box_width - 1) {
 149                                                         scroll++;
 150                                                         wmove(dialog, box_y, box_x);
 151                                                         for (i = 0; i < box_width - 1; i++)
 152                                                                 waddch(dialog, instr [scroll + i]);
 153                                                 } else {
 154                                                         wmove(dialog, box_y, input_x++ + box_x);
 155                                                         waddch(dialog, key);
 156                                                 }
 157                                                 wrefresh(dialog);
 158                                         } else
 159                                                 flash();        /* Alarm user about overflow */
 160                                         continue;
 161                                 }
 162                         }
 163                 }
 164                 switch (key) {
 165                 case 'O':
 166                 case 'o':
 167                         delwin(dialog);
 168                         return 0;
 169                 case 'H':
 170                 case 'h':
 171                         delwin(dialog);
 172                         return 1;
 173                 case KEY_UP:
 174                 case KEY_LEFT:
 175                         switch (button) {
 176                         case -1:
 177                                 button = 1;     /* Indicates "Cancel" button is selected */
 178                                 print_buttons(dialog, height, width, 1);
 179                                 break;
 180                         case 0:
 181                                 button = -1;    /* Indicates input box is selected */
 182                                 print_buttons(dialog, height, width, 0);
 183                                 wmove(dialog, box_y, box_x + input_x);
 184                                 wrefresh(dialog);
 185                                 break;
 186                         case 1:
 187                                 button = 0;     /* Indicates "OK" button is selected */
 188                                 print_buttons(dialog, height, width, 0);
 189                                 break;
 190                         }
 191                         break;
 192                 case TAB:
 193                 case KEY_DOWN:
 194                 case KEY_RIGHT:
 195                         switch (button) {
 196                         case -1:
 197                                 button = 0;     /* Indicates "OK" button is selected */
 198                                 print_buttons(dialog, height, width, 0);
 199                                 break;
 200                         case 0:
 201                                 button = 1;     /* Indicates "Cancel" button is selected */
 202                                 print_buttons(dialog, height, width, 1);
 203                                 break;
 204                         case 1:
 205                                 button = -1;    /* Indicates input box is selected */
 206                                 print_buttons(dialog, height, width, 0);
 207                                 wmove(dialog, box_y, box_x + input_x);
 208                                 wrefresh(dialog);
 209                                 break;
 210                         }
 211                         break;
 212                 case ' ':
 213                 case '\n':
 214                         delwin(dialog);
 215                         return (button == -1 ? 0 : button);
 216                 case 'X':
 217                 case 'x':
 218                         key = ESC;
 219                 case ESC:
 220                         break;
 221                 }
 222         }
 223
 224         delwin(dialog);
 225         return -1;              /* ESC pressed */
 226 }