extra/config/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, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "dialog.h"
  22
  23 char dialog_input_result[MAX_LEN + 1];
  24
  25 /*
  26  *  Print the termination buttons
  27  */
  28 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  29 {
  30         int x = width / 2 - 11;
  31         int y = height - 2;
  32
  33         print_button(dialog, gettext("  Ok  "), y, x, selected == 0);
  34         print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
  35
  36         wmove(dialog, y, x + 1 + 14 * selected);
  37         wrefresh(dialog);
  38 }
  39
  40 /*
  41  * Display a dialog box for inputing a string
  42  */
  43 int dialog_inputbox(const char *title, const char *prompt, int height, int width,
  44                     const char *init)
  45 {
  46         int i, x, y, box_y, box_x, box_width;
  47         int input_x = 0, scroll = 0, key = 0, button = -1;
  48         char *instr = dialog_input_result;
  49         WINDOW *dialog;
  50
  51         if (!init)
  52                 instr[0] = '\0';
  53         else
  54                 strcpy(instr, init);
  55
  56 do_resize:
  57         if (getmaxy(stdscr) <= (height - 2))
  58                 return -ERRDISPLAYTOOSMALL;
  59         if (getmaxx(stdscr) <= (width - 2))
  60                 return -ERRDISPLAYTOOSMALL;
  61
  62         /* center dialog box on screen */
  63         x = (COLS - width) / 2;
  64         y = (LINES - height) / 2;
  65
  66         draw_shadow(stdscr, y, x, height, width);
  67
  68         dialog = newwin(height, width, y, x);
  69         keypad(dialog, TRUE);
  70
  71         draw_box(dialog, 0, 0, height, width,
  72                  dlg.dialog.atr, dlg.border.atr);
  73         wattrset(dialog, dlg.border.atr);
  74         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
  75         for (i = 0; i < width - 2; i++)
  76                 waddch(dialog, ACS_HLINE);
  77         wattrset(dialog, dlg.dialog.atr);
  78         waddch(dialog, ACS_RTEE);
  79
  80         print_title(dialog, title, width);
  81
  82         wattrset(dialog, dlg.dialog.atr);
  83         print_autowrap(dialog, prompt, width - 2, 1, 3);
  84
  85         /* Draw the input field box */
  86         box_width = width - 6;
  87         getyx(dialog, y, x);
  88         box_y = y + 2;
  89         box_x = (width - box_width) / 2;
  90         draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
  91                  dlg.dialog.atr, dlg.border.atr);
  92
  93         print_buttons(dialog, height, width, 0);
  94
  95         /* Set up the initial value */
  96         wmove(dialog, box_y, box_x);
  97         wattrset(dialog, dlg.inputbox.atr);
  98
  99         input_x = strlen(instr);
 100
 101         if (input_x >= box_width) {
 102                 scroll = input_x - box_width + 1;
 103                 input_x = box_width - 1;
 104                 for (i = 0; i < box_width - 1; i++)
 105                         waddch(dialog, instr[scroll + i]);
 106         } else {
 107                 waddstr(dialog, instr);
 108         }
 109
 110         wmove(dialog, box_y, box_x + input_x);
 111
 112         wrefresh(dialog);
 113
 114         while (key != KEY_ESC) {
 115                 key = wgetch(dialog);
 116
 117                 if (button == -1) {     /* Input box selected */
 118                         switch (key) {
 119                         case TAB:
 120                         case KEY_UP:
 121                         case KEY_DOWN:
 122                                 break;
 123                         case KEY_LEFT:
 124                                 continue;
 125                         case KEY_RIGHT:
 126                                 continue;
 127                         case KEY_BACKSPACE:
 128                         case 127:
 129                                 if (input_x || scroll) {
 130                                         wattrset(dialog, dlg.inputbox.atr);
 131                                         if (!input_x) {
 132                                                 scroll = scroll < box_width - 1 ? 0 : scroll - (box_width - 1);
 133                                                 wmove(dialog, box_y, box_x);
 134                                                 for (i = 0; i < box_width; i++)
 135                                                         waddch(dialog,
 136                                                                instr[scroll + input_x + i] ?
 137                                                                instr[scroll + input_x + i] : ' ');
 138                                                 input_x = strlen(instr) - scroll;
 139                                         } else
 140                                                 input_x--;
 141                                         instr[scroll + input_x] = '\0';
 142                                         mvwaddch(dialog, box_y, input_x + box_x, ' ');
 143                                         wmove(dialog, box_y, input_x + box_x);
 144                                         wrefresh(dialog);
 145                                 }
 146                                 continue;
 147                         default:
 148                                 if (key < 0x100 && isprint(key)) {
 149                                         if (scroll + input_x < MAX_LEN) {
 150                                                 wattrset(dialog, dlg.inputbox.atr);
 151                                                 instr[scroll + input_x] = key;
 152                                                 instr[scroll + input_x + 1] = '\0';
 153                                                 if (input_x == box_width - 1) {
 154                                                         scroll++;
 155                                                         wmove(dialog, box_y, box_x);
 156                                                         for (i = 0; i < box_width - 1; i++)
 157                                                                 waddch(dialog, instr [scroll + i]);
 158                                                 } else {
 159                                                         wmove(dialog, box_y, input_x++ + box_x);
 160                                                         waddch(dialog, key);
 161                                                 }
 162                                                 wrefresh(dialog);
 163                                         } else
 164                                                 flash();        /* Alarm user about overflow */
 165                                         continue;
 166                                 }
 167                         }
 168                 }
 169                 switch (key) {
 170                 case 'O':
 171                 case 'o':
 172                         delwin(dialog);
 173                         return 0;
 174                 case 'H':
 175                 case 'h':
 176                         delwin(dialog);
 177                         return 1;
 178                 case KEY_UP:
 179                 case KEY_LEFT:
 180                         switch (button) {
 181                         case -1:
 182                                 button = 1;     /* Indicates "Cancel" button is selected */
 183                                 print_buttons(dialog, height, width, 1);
 184                                 break;
 185                         case 0:
 186                                 button = -1;    /* Indicates input box is selected */
 187                                 print_buttons(dialog, height, width, 0);
 188                                 wmove(dialog, box_y, box_x + input_x);
 189                                 wrefresh(dialog);
 190                                 break;
 191                         case 1:
 192                                 button = 0;     /* Indicates "OK" button is selected */
 193                                 print_buttons(dialog, height, width, 0);
 194                                 break;
 195                         }
 196                         break;
 197                 case TAB:
 198                 case KEY_DOWN:
 199                 case KEY_RIGHT:
 200                         switch (button) {
 201                         case -1:
 202                                 button = 0;     /* Indicates "OK" button is selected */
 203                                 print_buttons(dialog, height, width, 0);
 204                                 break;
 205                         case 0:
 206                                 button = 1;     /* Indicates "Cancel" button is selected */
 207                                 print_buttons(dialog, height, width, 1);
 208                                 break;
 209                         case 1:
 210                                 button = -1;    /* Indicates input box is selected */
 211                                 print_buttons(dialog, height, width, 0);
 212                                 wmove(dialog, box_y, box_x + input_x);
 213                                 wrefresh(dialog);
 214                                 break;
 215                         }
 216                         break;
 217                 case ' ':
 218                 case '\n':
 219                         delwin(dialog);
 220                         return (button == -1 ? 0 : button);
 221                 case 'X':
 222                 case 'x':
 223                         key = KEY_ESC;
 224                         break;
 225                 case KEY_ESC:
 226                         key = on_key_esc(dialog);
 227                         break;
 228                 case KEY_RESIZE:
 229                         delwin(dialog);
 230                         on_key_resize();
 231                         goto do_resize;
 232                 }
 233         }
 234
 235         delwin(dialog);
 236         return KEY_ESC;         /* ESC pressed */
 237 }