scripts/lxdialog/inputbox.c

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

DEFINITIONS
