scripts/lxdialog/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, const char * const * items, int flag)
 122
 123 {
 124     int i, x, y, box_x, box_y;
 125     int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
 126     WINDOW *dialog, *list;
 127
 128     checkflag = flag;
 129
 130     /* Allocate space for storing item on/off status */
 131     if ((status = malloc (sizeof (int) * item_no)) == NULL) {
 132         endwin ();
 133         fprintf (stderr,
 134                  "\nCan't allocate memory in dialog_checklist().\n");
 135         exit (-1);
 136     }
 137
 138     /* Initializes status */
 139     for (i = 0; i < item_no; i++) {
 140         status[i] = !strcasecmp (items[i * 3 + 2], "on");
 141         if ((!choice && status[i]) || !strcasecmp (items[i * 3 + 2], "selected"))
 142             choice = i + 1;
 143     }
 144     if (choice)
 145             choice--;
 146
 147     max_choice = MIN (list_height, item_no);
 148
 149     /* center dialog box on screen */
 150     x = (COLS - width) / 2;
 151     y = (LINES - height) / 2;
 152
 153     draw_shadow (stdscr, y, x, height, width);
 154
 155     dialog = newwin (height, width, y, x);
 156     keypad (dialog, TRUE);
 157
 158     draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
 159     wattrset (dialog, border_attr);
 160     mvwaddch (dialog, height-3, 0, ACS_LTEE);
 161     for (i = 0; i < width - 2; i++)
 162         waddch (dialog, ACS_HLINE);
 163     wattrset (dialog, dialog_attr);
 164     waddch (dialog, ACS_RTEE);
 165
 166     if (title != NULL && strlen(title) >= width-2 ) {
 167         /* truncate long title -- mec */
 168         char * title2 = malloc(width-2+1);
 169         memcpy( title2, title, width-2 );
 170         title2[width-2] = '\0';
 171         title = title2;
 172     }
 173
 174     if (title != NULL) {
 175         wattrset (dialog, title_attr);
 176         mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
 177         waddstr (dialog, (char *)title);
 178         waddch (dialog, ' ');
 179     }
 180
 181     wattrset (dialog, dialog_attr);
 182     print_autowrap (dialog, prompt, width - 2, 1, 3);
 183
 184     list_width = width - 6;
 185     box_y = height - list_height - 5;
 186     box_x = (width - list_width) / 2 - 1;
 187
 188     /* create new window for the list */
 189     list = subwin (dialog, list_height, list_width, y+box_y+1, x+box_x+1);
 190
 191     keypad (list, TRUE);
 192
 193     /* draw a box around the list items */
 194     draw_box (dialog, box_y, box_x, list_height + 2, list_width + 2,
 195               menubox_border_attr, menubox_attr);
 196
 197     /* Find length of longest item in order to center checklist */
 198     check_x = 0;
 199     for (i = 0; i < item_no; i++)
 200         check_x = MAX (check_x, + strlen (items[i * 3 + 1]) + 4);
 201
 202     check_x = (list_width - check_x) / 2;
 203     item_x = check_x + 4;
 204
 205     if (choice >= list_height) {
 206         scroll = choice - list_height + 1;
 207         choice -= scroll;
 208     }
 209
 210     /* Print the list */
 211     for (i = 0; i < max_choice; i++) {
 212         print_item (list, items[(scroll+i) * 3 + 1],
 213                     status[i+scroll], i, i == choice);
 214     }
 215
 216     print_arrows(dialog, choice, item_no, scroll,
 217                         box_y, box_x + check_x + 5, list_height);
 218
 219     print_buttons(dialog, height, width, 0);
 220
 221     wnoutrefresh (list);
 222     wnoutrefresh (dialog);
 223     doupdate ();
 224
 225     while (key != ESC) {
 226         key = wgetch (dialog);
 227
 228         for (i = 0; i < max_choice; i++)
 229             if (toupper(key) == toupper(items[(scroll+i)*3+1][0]))
 230                 break;
 231
 232
 233         if ( i < max_choice || key == KEY_UP || key == KEY_DOWN ||
 234             key == '+' || key == '-' ) {
 235             if (key == KEY_UP || key == '-') {
 236                 if (!choice) {
 237                     if (!scroll)
 238                         continue;
 239                     /* Scroll list down */
 240                     if (list_height > 1) {
 241                         /* De-highlight current first item */
 242                         print_item (list, items[scroll * 3 + 1],
 243                                         status[scroll], 0, FALSE);
 244                         scrollok (list, TRUE);
 245                         wscrl (list, -1);
 246                         scrollok (list, FALSE);
 247                     }
 248                     scroll--;
 249                     print_item (list, items[scroll * 3 + 1],
 250                                 status[scroll], 0, TRUE);
 251                     wnoutrefresh (list);
 252
 253                     print_arrows(dialog, choice, item_no, scroll,
 254                                 box_y, box_x + check_x + 5, list_height);
 255
 256                     wrefresh (dialog);
 257
 258                     continue;   /* wait for another key press */
 259                 } else
 260                     i = choice - 1;
 261             } else if (key == KEY_DOWN || key == '+') {
 262                 if (choice == max_choice - 1) {
 263                     if (scroll + choice >= item_no - 1)
 264                         continue;
 265                     /* Scroll list up */
 266                     if (list_height > 1) {
 267                         /* De-highlight current last item before scrolling up */
 268                         print_item (list, items[(scroll + max_choice - 1) * 3 + 1],
 269                                     status[scroll + max_choice - 1],
 270                                     max_choice - 1, FALSE);
 271                         scrollok (list, TRUE);
 272                         wscrl (list, 1);
 273                         scrollok (list, FALSE);
 274                     }
 275                     scroll++;
 276                     print_item (list, items[(scroll + max_choice - 1) * 3 + 1],
 277                                 status[scroll + max_choice - 1],
 278                                 max_choice - 1, TRUE);
 279                     wnoutrefresh (list);
 280
 281                     print_arrows(dialog, choice, item_no, scroll,
 282                                 box_y, box_x + check_x + 5, list_height);
 283
 284                     wrefresh (dialog);
 285
 286                     continue;   /* wait for another key press */
 287                 } else
 288                     i = choice + 1;
 289             }
 290             if (i != choice) {
 291                 /* De-highlight current item */
 292                 print_item (list, items[(scroll + choice) * 3 + 1],
 293                             status[scroll + choice], choice, FALSE);
 294                 /* Highlight new item */
 295                 choice = i;
 296                 print_item (list, items[(scroll + choice) * 3 + 1],
 297                             status[scroll + choice], choice, TRUE);
 298                 wnoutrefresh (list);
 299                 wrefresh (dialog);
 300             }
 301             continue;           /* wait for another key press */
 302         }
 303         switch (key) {
 304         case 'H':
 305         case 'h':
 306         case '?':
 307             fprintf (stderr, "%s", items[(scroll + choice) * 3]);
 308             delwin (dialog);
 309             free (status);
 310             return 1;
 311         case TAB:
 312         case KEY_LEFT:
 313         case KEY_RIGHT:
 314             button = ((key == KEY_LEFT ? --button : ++button) < 0)
 315                         ? 1 : (button > 1 ? 0 : button);
 316
 317             print_buttons(dialog, height, width, button);
 318             wrefresh (dialog);
 319             break;
 320         case 'S':
 321         case 's':
 322         case ' ':
 323         case '\n':
 324             if (!button) {
 325                 if (flag == FLAG_CHECK) {
 326                     status[scroll + choice] = !status[scroll + choice];
 327                     wmove (list, choice, check_x);
 328                     wattrset (list, check_selected_attr);
 329                     wprintw (list, "[%c]", status[scroll + choice] ? 'X' : ' ');
 330                 } else {
 331                     if (!status[scroll + choice]) {
 332                         for (i = 0; i < item_no; i++)
 333                             status[i] = 0;
 334                         status[scroll + choice] = 1;
 335                         for (i = 0; i < max_choice; i++)
 336                             print_item (list, items[(scroll + i) * 3 + 1],
 337                                         status[scroll + i], i, i == choice);
 338                     }
 339                 }
 340                 wnoutrefresh (list);
 341                 wrefresh (dialog);
 342
 343                 for (i = 0; i < item_no; i++) {
 344                     if (status[i]) {
 345                         if (flag == FLAG_CHECK) {
 346                             fprintf (stderr, "\"%s\" ", items[i * 3]);
 347                         } else {
 348                             fprintf (stderr, "%s", items[i * 3]);
 349                         }
 350
 351                     }
 352                 }
 353             } else
 354                 fprintf (stderr, "%s", items[(scroll + choice) * 3]);
 355             delwin (dialog);
 356             free (status);
 357             return button;
 358         case 'X':
 359         case 'x':
 360             key = ESC;
 361         case ESC:
 362             break;
 363         }
 364
 365         /* Now, update everything... */
 366         doupdate ();
 367     }
 368
 369
 370     delwin (dialog);
 371     free (status);
 372     return -1;                  /* ESC pressed */
 373 }