package/config/checklist.c

   1 /*
   2  *  checklist.c -- implements the checklist box
   3  *
   4  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
   5  *     Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
   6  *     Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
   7  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
   8  *
   9  *  This program is free software; you can redistribute it and/or
  10  *  modify it under the terms of the GNU General Public License
  11  *  as published by the Free Software Foundation; either version 2
  12  *  of the License, or (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #include "dialog.h"
  25
  26 static int list_width, check_x, item_x, checkflag;
  27
  28 /*
  29  * Print list item
  30  */
  31 static void
  32 print_item (WINDOW * win, const char *item, int status,
  33             int choice, int selected)
  34 {
  35     int i;
  36
  37     /* Clear 'residue' of last item */
  38     wattrset (win, menubox_attr);
  39     wmove (win, choice, 0);
  40     for (i = 0; i < list_width; i++)
  41         waddch (win, ' ');
  42
  43     wmove (win, choice, check_x);
  44     wattrset (win, selected ? check_selected_attr : check_attr);
  45     if (checkflag == FLAG_CHECK)
  46         wprintw (win, "[%c]", status ? 'X' : ' ');
  47     else
  48         wprintw (win, "(%c)", status ? 'X' : ' ');
  49
  50     wattrset (win, selected ? tag_selected_attr : tag_attr);
  51     mvwaddch(win, choice, item_x, item[0]);
  52     wattrset (win, selected ? item_selected_attr : item_attr);
  53     waddstr (win, (char *)item+1);
  54     if (selected) {
  55         wmove (win, choice, check_x+1);
  56         wrefresh (win);
  57     }
  58 }
  59
  60 /*
  61  * Print the scroll indicators.
  62  */
  63 static void
  64 print_arrows (WINDOW * win, int choice, int item_no, int scroll,
  65                 int y, int x, int height)
  66 {
  67     wmove(win, y, x);
  68
  69     if (scroll > 0) {
  70         wattrset (win, uarrow_attr);
  71         waddch (win, ACS_UARROW);
  72         waddstr (win, "(-)");
  73     }
  74     else {
  75         wattrset (win, menubox_attr);
  76         waddch (win, ACS_HLINE);
  77         waddch (win, ACS_HLINE);
  78         waddch (win, ACS_HLINE);
  79         waddch (win, ACS_HLINE);
  80     }
  81
  82    y = y + height + 1;
  83    wmove(win, y, x);
  84
  85    if ((height < item_no) && (scroll + choice < item_no - 1)) {
  86         wattrset (win, darrow_attr);
  87         waddch (win, ACS_DARROW);
  88         waddstr (win, "(+)");
  89     }
  90     else {
  91         wattrset (win, menubox_border_attr);
  92         waddch (win, ACS_HLINE);
  93         waddch (win, ACS_HLINE);
  94         waddch (win, ACS_HLINE);
  95         waddch (win, ACS_HLINE);
  96    }
  97 }
  98
  99 /*
 100  *  Display the termination buttons
 101  */
 102 static void
 103 print_buttons( WINDOW *dialog, int height, int width, int selected)
 104 {
 105     int x = width / 2 - 11;
 106     int y = height - 2;
 107
 108     print_button (dialog, "Select", y, x, selected == 0);
 109     print_button (dialog, " Help ", y, x + 14, selected == 1);
 110
 111     wmove(dialog, y, x+1 + 14*selected);
 112     wrefresh (dialog);
 113 }
 114
 115 /*
 116  * Display a dialog box with a list of options that can be turned on or off
 117  * The `flag' parameter is used to select between radiolist and checklist.
 118  */
 119 int
 120 dialog_checklist (const char *title, const char *prompt, int height, int width,
 121         int list_height, int item_no, struct dialog_list_item ** items,
 122         int flag)
 123
 124 {
 125     int i, x, y, box_x, box_y;
 126     int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
 127     WINDOW *dialog, *list;
 128
 129     checkflag = flag;
 130
 131     /* Allocate space for storing item on/off status */
 132     if ((status = malloc (sizeof (int) * item_no)) == NULL) {
 133         endwin ();
 134         fprintf (stderr,
 135                  "\nCan't allocate memory in dialog_checklist().\n");
 136         exit (-1);
 137     }
 138
 139     /* Initializes status */
 140     for (i = 0; i < item_no; i++) {
 141         status[i] = (items[i]->selected == 1); /* ON */
 142         if ((!choice && status[i]) || items[i]->selected == 2) /* SELECTED */
 143             choice = i + 1;
 144     }
 145     if (choice)
 146             choice--;
 147
 148     max_choice = MIN (list_height, item_no);
 149
 150     /* center dialog box on screen */
 151     x = (COLS - width) / 2;
 152     y = (LINES - height) / 2;
 153
 154     draw_shadow (stdscr, y, x, height, width);
 155
 156     dialog = newwin (height, width, y, x);
 157     keypad (dialog, TRUE);
 158
 159     draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
 160     wattrset (dialog, border_attr);
 161     mvwaddch (dialog, height-3, 0, ACS_LTEE);
 162     for (i = 0; i < width - 2; i++)
 163         waddch (dialog, ACS_HLINE);
 164     wattrset (dialog, dialog_attr);
 165     waddch (dialog, ACS_RTEE);
 166
 167     if (title != NULL && strlen(title) >= width-2 ) {
 168         /* truncate long title -- mec */
 169         char * title2 = malloc(width-2+1);
 170         memcpy( title2, title, width-2 );
 171         title2[width-2] = '\0';
 172         title = title2;
 173     }
 174
 175     if (title != NULL) {
 176         wattrset (dialog, title_attr);
 177         mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
 178         waddstr (dialog, (char *)title);
 179         waddch (dialog, ' ');
 180     }
 181
 182     wattrset (dialog, dialog_attr);
 183     print_autowrap (dialog, prompt, width - 2, 1, 3);
 184
 185     list_width = width - 6;
 186     box_y = height - list_height - 5;
 187     box_x = (width - list_width) / 2 - 1;
 188
 189     /* create new window for the list */
 190     list = subwin (dialog, list_height, list_width, y+box_y+1, x+box_x+1);
 191
 192     keypad (list, TRUE);
 193
 194     /* draw a box around the list items */
 195     draw_box (dialog, box_y, box_x, list_height + 2, list_width + 2,
 196               menubox_border_attr, menubox_attr);
 197
 198     /* Find length of longest item in order to center checklist */
 199     check_x = 0;
 200     for (i = 0; i < item_no; i++)
 201         check_x = MAX (check_x, + strlen (items[i]->name) + 4);
 202
 203     check_x = (list_width - check_x) / 2;
 204     item_x = check_x + 4;
 205
 206     if (choice >= list_height) {
 207         scroll = choice - list_height + 1;
 208         choice -= scroll;
 209     }
 210
 211     /* Print the list */
 212     for (i = 0; i < max_choice; i++) {
 213         print_item (list, items[scroll + i]->name,
 214                     status[i+scroll], i, i == choice);
 215     }
 216
 217     print_arrows(dialog, choice, item_no, scroll,
 218                         box_y, box_x + check_x + 5, list_height);
 219
 220     print_buttons(dialog, height, width, 0);
 221
 222     wnoutrefresh (list);
 223     wnoutrefresh (dialog);
 224     doupdate ();
 225
 226     while (key != ESC) {
 227         key = wgetch (dialog);
 228
 229         for (i = 0; i < max_choice; i++)
 230             if (toupper(key) == toupper(items[scroll + i]->name[0]))
 231                 break;
 232
 233
 234         if ( i < max_choice || key == KEY_UP || key == KEY_DOWN ||
 235             key == '+' || key == '-' ) {
 236             if (key == KEY_UP || key == '-') {
 237                 if (!choice) {
 238                     if (!scroll)
 239                         continue;
 240                     /* Scroll list down */
 241                     if (list_height > 1) {
 242                         /* De-highlight current first item */
 243                         print_item (list, items[scroll]->name,
 244                                         status[scroll], 0, FALSE);
 245                         scrollok (list, TRUE);
 246                         wscrl (list, -1);
 247                         scrollok (list, FALSE);
 248                     }
 249                     scroll--;
 250                     print_item (list, items[scroll]->name,
 251                                 status[scroll], 0, TRUE);
 252                     wnoutrefresh (list);
 253
 254                     print_arrows(dialog, choice, item_no, scroll,
 255                                 box_y, box_x + check_x + 5, list_height);
 256
 257                     wrefresh (dialog);
 258
 259                     continue;   /* wait for another key press */
 260                 } else
 261                     i = choice - 1;
 262             } else if (key == KEY_DOWN || key == '+') {
 263                 if (choice == max_choice - 1) {
 264                     if (scroll + choice >= item_no - 1)
 265                         continue;
 266                     /* Scroll list up */
 267                     if (list_height > 1) {
 268                         /* De-highlight current last item before scrolling up */
 269                         print_item (list, items[scroll + max_choice - 1]->name,
 270                                     status[scroll + max_choice - 1],
 271                                     max_choice - 1, FALSE);
 272                         scrollok (list, TRUE);
 273                         scroll (list);
 274                         scrollok (list, FALSE);
 275                     }
 276                     scroll++;
 277                     print_item (list, items[scroll + max_choice - 1]->name,
 278                                 status[scroll + max_choice - 1],
 279                                 max_choice - 1, TRUE);
 280                     wnoutrefresh (list);
 281
 282                     print_arrows(dialog, choice, item_no, scroll,
 283                                 box_y, box_x + check_x + 5, list_height);
 284
 285                     wrefresh (dialog);
 286
 287                     continue;   /* wait for another key press */
 288                 } else
 289                     i = choice + 1;
 290             }
 291             if (i != choice) {
 292                 /* De-highlight current item */
 293                 print_item (list, items[scroll + choice]->name,
 294                             status[scroll + choice], choice, FALSE);
 295                 /* Highlight new item */
 296                 choice = i;
 297                 print_item (list, items[scroll + choice]->name,
 298                             status[scroll + choice], choice, TRUE);
 299                 wnoutrefresh (list);
 300                 wrefresh (dialog);
 301             }
 302             continue;           /* wait for another key press */
 303         }
 304         switch (key) {
 305         case 'H':
 306         case 'h':
 307         case '?':
 308             for (i = 0; i < item_no; i++)
 309                 items[i]->selected = 0;
 310             items[scroll + choice]->selected = 1;
 311             delwin (dialog);
 312             free (status);
 313             return 1;
 314         case TAB:
 315         case KEY_LEFT:
 316         case KEY_RIGHT:
 317             button = ((key == KEY_LEFT ? --button : ++button) < 0)
 318                         ? 1 : (button > 1 ? 0 : button);
 319
 320             print_buttons(dialog, height, width, button);
 321             wrefresh (dialog);
 322             break;
 323         case 'S':
 324         case 's':
 325         case ' ':
 326         case '\n':
 327             if (!button) {
 328                 if (flag == FLAG_CHECK) {
 329                     status[scroll + choice] = !status[scroll + choice];
 330                     wmove (list, choice, check_x);
 331                     wattrset (list, check_selected_attr);
 332                     wprintw (list, "[%c]", status[scroll + choice] ? 'X' : ' ');
 333                 } else {
 334                     if (!status[scroll + choice]) {
 335                         for (i = 0; i < item_no; i++)
 336                             status[i] = 0;
 337                         status[scroll + choice] = 1;
 338                         for (i = 0; i < max_choice; i++)
 339                             print_item (list, items[scroll + i]->name,
 340                                         status[scroll + i], i, i == choice);
 341                     }
 342                 }
 343                 wnoutrefresh (list);
 344                 wrefresh (dialog);
 345
 346                 for (i = 0; i < item_no; i++) {
 347                         items[i]->selected = status[i];
 348                 }
 349             } else {
 350                     for (i = 0; i < item_no; i++)
 351                             items[i]->selected = 0;
 352                     items[scroll + choice]->selected = 1;
 353             }
 354             delwin (dialog);
 355             free (status);
 356             return button;
 357         case 'X':
 358         case 'x':
 359             key = ESC;
 360         case ESC:
 361             break;
 362         }
 363
 364         /* Now, update everything... */
 365         doupdate ();
 366     }
 367
 368
 369     delwin (dialog);
 370     free (status);
 371     return -1;                  /* ESC pressed */
 372 }