misc/confdialog/inputbox.c

   1 /*
   2  * --- T2-COPYRIGHT-NOTE-BEGIN ---
   3  * This copyright note is auto-generated by ./scripts/Create-CopyPatch.
   4  *
   5  * T2 SDE: misc/confdialog/inputbox.c
   6  * Copyright (C) 2004 - 2005 The T2 SDE Project
   7  * Copyright (C) 1998 - 2003 ROCK Linux Project
   8  *
   9  * More information can be found in the files COPYING and README.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; version 2 of the License. A copy of the
  14  * GNU General Public License can be found in the file COPYING.
  15  * --- T2-COPYRIGHT-NOTE-END ---
  16  */
  17 /*
  18  *  inputbox.c -- implements the input box
  19  *
  20  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
  21  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
  22  *  MODIFIED FOR ROCK LINUX CONFIG BY: Clifford Wolf (clifford@clifford.at)
  23  *
  24  *  This program is free software; you can redistribute it and/or
  25  *  modify it under the terms of the GNU General Public License
  26  *  as published by the Free Software Foundation; either version 2
  27  *  of the License, or (at your option) any later version.
  28  *
  29  *  This program is distributed in the hope that it will be useful,
  30  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  31  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  *  GNU General Public License for more details.
  33  *
  34  *  You should have received a copy of the GNU General Public License
  35  *  along with this program; if not, write to the Free Software
  36  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  37  */
  38
  39 #include "dialog.h"
  40
  41 char dialog_input_result[MAX_LEN + 1];
  42
  43 /*
  44  *  Print the termination buttons
  45  */
  46 static void
  47 print_buttons(WINDOW *dialog, int height, int width, int selected)
  48 {
  49     int x = width / 2 - 5;
  50     int y = height - 2;
  51
  52     print_button (dialog, "  Ok  ", y, x, selected==0);
  53     // print_button (dialog, " Help ", y, x + 14, selected==1);
  54
  55     wmove(dialog, y, x+1+14*selected);
  56     wrefresh(dialog);
  57 }
  58
  59 /*
  60  * Display a dialog box for inputing a string
  61  */
  62 int
  63 dialog_inputbox (const char *title, const char *prompt, int height, int width,
  64                  const char *init)
  65 {
  66     int i, x, y, box_y, box_x, box_width;
  67     int input_x = 0, scroll = 0, key = 0, button = -1;
  68     char *instr = dialog_input_result;
  69     WINDOW *dialog;
  70
  71     /* center dialog box on screen */
  72     x = (COLS - width) / 2;
  73     y = (LINES - height) / 2;
  74
  75
  76     draw_shadow (stdscr, y, x, height, width);
  77
  78     dialog = newwin (height, width, y, x);
  79     keypad (dialog, TRUE);
  80
  81     draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
  82     wattrset (dialog, border_attr);
  83     mvwaddch (dialog, height-3, 0, ACS_LTEE);
  84     for (i = 0; i < width - 2; i++)
  85         waddch (dialog, ACS_HLINE);
  86     wattrset (dialog, dialog_attr);
  87     waddch (dialog, ACS_RTEE);
  88
  89     if (title != NULL && strlen(title) >= width-2 ) {
  90         /* truncate long title -- mec */
  91         char * title2 = malloc(width-2+1);
  92         memcpy( title2, title, width-2 );
  93         title2[width-2] = '\0';
  94         title = title2;
  95     }
  96
  97     if (title != NULL) {
  98         wattrset (dialog, title_attr);
  99         mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
 100         waddstr (dialog, (char *)title);
 101         waddch (dialog, ' ');
 102     }
 103
 104     wattrset (dialog, dialog_attr);
 105     print_autowrap (dialog, prompt, width - 2, 1, 3);
 106
 107     /* Draw the input field box */
 108     box_width = width - 6;
 109     getyx (dialog, y, x);
 110     box_y = y + 2;
 111     box_x = (width - box_width) / 2;
 112     draw_box (dialog, y + 1, box_x - 1, 3, box_width + 2,
 113               border_attr, dialog_attr);
 114
 115     print_buttons(dialog, height, width, 0);
 116
 117     /* Set up the initial value */
 118     wmove (dialog, box_y, box_x);
 119     wattrset (dialog, inputbox_attr);
 120
 121     if (!init)
 122         instr[0] = '\0';
 123     else
 124         strcpy (instr, init);
 125
 126     input_x = strlen (instr);
 127
 128     if (input_x >= box_width) {
 129         scroll = input_x - box_width + 1;
 130         input_x = box_width - 1;
 131         for (i = 0; i < box_width - 1; i++)
 132             waddch (dialog, instr[scroll + i]);
 133     } else
 134         waddstr (dialog, instr);
 135
 136     wmove (dialog, box_y, box_x + input_x);
 137
 138     wrefresh (dialog);
 139
 140     while (key != ESC) {
 141         key = wgetch (dialog);
 142
 143         if (button == -1) {     /* Input box selected */
 144             switch (key) {
 145             case TAB:
 146             case KEY_UP:
 147             case KEY_DOWN:
 148                 break;
 149             case KEY_LEFT:
 150                 continue;
 151             case KEY_RIGHT:
 152                 continue;
 153             case KEY_BACKSPACE:
 154             case 127:
 155                 if (input_x || scroll) {
 156                     wattrset (dialog, inputbox_attr);
 157                     if (!input_x) {
 158                         scroll = scroll < box_width - 1 ?
 159                             0 : scroll - (box_width - 1);
 160                         wmove (dialog, box_y, box_x);
 161                         for (i = 0; i < box_width; i++)
 162                             waddch (dialog, instr[scroll + input_x + i] ?
 163                                     instr[scroll + input_x + i] : ' ');
 164                         input_x = strlen (instr) - scroll;
 165                     } else
 166                         input_x--;
 167                     instr[scroll + input_x] = '\0';
 168                     mvwaddch (dialog, box_y, input_x + box_x, ' ');
 169                     wmove (dialog, box_y, input_x + box_x);
 170                     wrefresh (dialog);
 171                 }
 172                 continue;
 173             default:
 174                 if (key < 0x100 && isprint (key)) {
 175                     if (scroll + input_x < MAX_LEN) {
 176                         wattrset (dialog, inputbox_attr);
 177                         instr[scroll + input_x] = key;
 178                         instr[scroll + input_x + 1] = '\0';
 179                         if (input_x == box_width - 1) {
 180                             scroll++;
 181                             wmove (dialog, box_y, box_x);
 182                             for (i = 0; i < box_width - 1; i++)
 183                                 waddch (dialog, instr[scroll + i]);
 184                         } else {
 185                             wmove (dialog, box_y, input_x++ + box_x);
 186                             waddch (dialog, key);
 187                         }
 188                         wrefresh (dialog);
 189                     } else
 190                         flash ();       /* Alarm user about overflow */
 191                     continue;
 192                 }
 193             }
 194         }
 195         switch (key) {
 196         case 'O':
 197         case 'o':
 198             delwin (dialog);
 199             return 0;
 200         case KEY_UP:
 201         case KEY_LEFT:
 202             switch (button) {
 203             case -1:
 204                 button = 1;     /* Indicates "Cancel" button is selected */
 205                 print_buttons(dialog, height, width, 1);
 206                 break;
 207             case 0:
 208                 button = -1;    /* Indicates input box is selected */
 209                 print_buttons(dialog, height, width, 0);
 210                 wmove (dialog, box_y, box_x + input_x);
 211                 wrefresh (dialog);
 212                 break;
 213             case 1:
 214                 button = 0;     /* Indicates "OK" button is selected */
 215                 print_buttons(dialog, height, width, 0);
 216                 break;
 217             }
 218             break;
 219         case TAB:
 220         case KEY_DOWN:
 221         case KEY_RIGHT:
 222             switch (button) {
 223             case -1:
 224                 button = 1;     /* Indicates "OK" button is selected */
 225                 print_buttons(dialog, height, width, 0);
 226                 break;
 227             case 0:
 228                 button = 1;     /* Indicates "Cancel" button is selected */
 229                 print_buttons(dialog, height, width, 1);
 230                 break;
 231             case 1:
 232                 button = -1;    /* Indicates input box is selected */
 233                 print_buttons(dialog, height, width, 0);
 234                 wmove (dialog, box_y, box_x + input_x);
 235                 wrefresh (dialog);
 236                 break;
 237             }
 238             break;
 239         case ' ':
 240         case '\n':
 241             delwin (dialog);
 242             return (button == -1 ? 0 : button);
 243         case 'X':
 244         case 'x':
 245             key = ESC;
 246         case ESC:
 247             break;
 248         }
 249     }
 250
 251     delwin (dialog);
 252     return -1;                  /* ESC pressed */
 253 }