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 print_item(WINDOW * win, const char *item, int status, int choice,
  32                        int selected)
  33 {
  34         int i;
  35
  36         /* Clear 'residue' of last item */
  37         wattrset(win, menubox_attr);
  38         wmove(win, choice, 0);
  39         for (i = 0; i < list_width; i++)
  40                 waddch(win, ' ');
  41
  42         wmove(win, choice, check_x);
  43         wattrset(win, selected ? check_selected_attr : check_attr);
  44         if (checkflag == FLAG_CHECK)
  45                 wprintw(win, "[%c]", status ? 'X' : ' ');
  46         else
  47                 wprintw(win, "(%c)", status ? 'X' : ' ');
  48
  49         wattrset(win, selected ? tag_selected_attr : tag_attr);
  50         mvwaddch(win, choice, item_x, item[0]);
  51         wattrset(win, selected ? item_selected_attr : item_attr);
  52         waddstr(win, (char *)item + 1);
  53         if (selected) {
  54                 wmove(win, choice, check_x + 1);
  55                 wrefresh(win);
  56         }
  57 }
  58
  59 /*
  60  * Print the scroll indicators.
  61  */
  62 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
  63              int y, int x, int height)
  64 {
  65         wmove(win, y, x);
  66
  67         if (scroll > 0) {
  68                 wattrset(win, uarrow_attr);
  69                 waddch(win, ACS_UARROW);
  70                 waddstr(win, "(-)");
  71         } else {
  72                 wattrset(win, menubox_attr);
  73                 waddch(win, ACS_HLINE);
  74                 waddch(win, ACS_HLINE);
  75                 waddch(win, ACS_HLINE);
  76                 waddch(win, ACS_HLINE);
  77         }
  78
  79         y = y + height + 1;
  80         wmove(win, y, x);
  81
  82         if ((height < item_no) && (scroll + choice < item_no - 1)) {
  83                 wattrset(win, darrow_attr);
  84                 waddch(win, ACS_DARROW);
  85                 waddstr(win, "(+)");
  86         } else {
  87                 wattrset(win, menubox_border_attr);
  88                 waddch(win, ACS_HLINE);
  89                 waddch(win, ACS_HLINE);
  90                 waddch(win, ACS_HLINE);
  91                 waddch(win, ACS_HLINE);
  92         }
  93 }
  94
  95 /*
  96  *  Display the termination buttons
  97  */
  98 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  99 {
 100         int x = width / 2 - 11;
 101         int y = height - 2;
 102
 103         print_button(dialog, "Select", y, x, selected == 0);
 104         print_button(dialog, " Help ", y, x + 14, selected == 1);
 105
 106         wmove(dialog, y, x + 1 + 14 * selected);
 107         wrefresh(dialog);
 108 }
 109
 110 /*
 111  * Display a dialog box with a list of options that can be turned on or off
 112  * The `flag' parameter is used to select between radiolist and checklist.
 113  */
 114 int dialog_checklist(const char *title, const char *prompt, int height,
 115                      int width, int list_height, int item_no,
 116                      const char *const *items, int flag)
 117 {
 118         int i, x, y, box_x, box_y;
 119         int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
 120         WINDOW *dialog, *list;
 121
 122         checkflag = flag;
 123
 124         /* Allocate space for storing item on/off status */
 125         if ((status = malloc(sizeof(int) * item_no)) == NULL) {
 126                 endwin();
 127                 fprintf(stderr,
 128                         "\nCan't allocate memory in dialog_checklist().\n");
 129                 exit(-1);
 130         }
 131
 132         /* Initializes status */
 133         for (i = 0; i < item_no; i++) {
 134                 status[i] = !strcasecmp(items[i * 3 + 2], "on");
 135                 if ((!choice && status[i])
 136                     || !strcasecmp(items[i * 3 + 2], "selected"))
 137                         choice = i + 1;
 138         }
 139         if (choice)
 140                 choice--;
 141
 142         max_choice = MIN(list_height, item_no);
 143
 144         /* center dialog box on screen */
 145         x = (COLS - width) / 2;
 146         y = (LINES - height) / 2;
 147
 148         draw_shadow(stdscr, y, x, height, width);
 149
 150         dialog = newwin(height, width, y, x);
 151         keypad(dialog, TRUE);
 152
 153         draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
 154         wattrset(dialog, border_attr);
 155         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
 156         for (i = 0; i < width - 2; i++)
 157                 waddch(dialog, ACS_HLINE);
 158         wattrset(dialog, dialog_attr);
 159         waddch(dialog, ACS_RTEE);
 160
 161         print_title(dialog, title, width);
 162
 163         wattrset(dialog, dialog_attr);
 164         print_autowrap(dialog, prompt, width - 2, 1, 3);
 165
 166         list_width = width - 6;
 167         box_y = height - list_height - 5;
 168         box_x = (width - list_width) / 2 - 1;
 169
 170         /* create new window for the list */
 171         list = subwin(dialog, list_height, list_width, y + box_y + 1,
 172                       x + box_x + 1);
 173
 174         keypad(list, TRUE);
 175
 176         /* draw a box around the list items */
 177         draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
 178                  menubox_border_attr, menubox_attr);
 179
 180         /* Find length of longest item in order to center checklist */
 181         check_x = 0;
 182         for (i = 0; i < item_no; i++)
 183                 check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
 184
 185         check_x = (list_width - check_x) / 2;
 186         item_x = check_x + 4;
 187
 188         if (choice >= list_height) {
 189                 scroll = choice - list_height + 1;
 190                 choice -= scroll;
 191         }
 192
 193         /* Print the list */
 194         for (i = 0; i < max_choice; i++) {
 195                 print_item(list, items[(scroll + i) * 3 + 1],
 196                            status[i + scroll], i, i == choice);
 197         }
 198
 199         print_arrows(dialog, choice, item_no, scroll,
 200                      box_y, box_x + check_x + 5, list_height);
 201
 202         print_buttons(dialog, height, width, 0);
 203
 204         wnoutrefresh(list);
 205         wnoutrefresh(dialog);
 206         doupdate();
 207
 208         while (key != ESC) {
 209                 key = wgetch(dialog);
 210
 211                 for (i = 0; i < max_choice; i++)
 212                         if (toupper(key) ==
 213                             toupper(items[(scroll + i) * 3 + 1][0]))
 214                                 break;
 215
 216                 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
 217                     key == '+' || key == '-') {
 218                         if (key == KEY_UP || key == '-') {
 219                                 if (!choice) {
 220                                         if (!scroll)
 221                                                 continue;
 222                                         /* Scroll list down */
 223                                         if (list_height > 1) {
 224                                                 /* De-highlight current first item */
 225                                                 print_item(list, items[scroll * 3 + 1],
 226                                                            status[scroll], 0, FALSE);
 227                                                 scrollok(list, TRUE);
 228                                                 wscrl(list, -1);
 229                                                 scrollok(list, FALSE);
 230                                         }
 231                                         scroll--;
 232                                         print_item(list, items[scroll * 3 + 1], status[scroll], 0, TRUE);
 233                                         wnoutrefresh(list);
 234
 235                                         print_arrows(dialog, choice, item_no,
 236                                                      scroll, box_y, box_x + check_x + 5, list_height);
 237
 238                                         wrefresh(dialog);
 239
 240                                         continue;       /* wait for another key press */
 241                                 } else
 242                                         i = choice - 1;
 243                         } else if (key == KEY_DOWN || key == '+') {
 244                                 if (choice == max_choice - 1) {
 245                                         if (scroll + choice >= item_no - 1)
 246                                                 continue;
 247                                         /* Scroll list up */
 248                                         if (list_height > 1) {
 249                                                 /* De-highlight current last item before scrolling up */
 250                                                 print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
 251                                                            status[scroll + max_choice - 1],
 252                                                            max_choice - 1, FALSE);
 253                                                 scrollok(list, TRUE);
 254                                                 wscrl(list, 1);
 255                                                 scrollok(list, FALSE);
 256                                         }
 257                                         scroll++;
 258                                         print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
 259                                                    status[scroll + max_choice - 1], max_choice - 1, TRUE);
 260                                         wnoutrefresh(list);
 261
 262                                         print_arrows(dialog, choice, item_no,
 263                                                      scroll, box_y, box_x + check_x + 5, list_height);
 264
 265                                         wrefresh(dialog);
 266
 267                                         continue;       /* wait for another key press */
 268                                 } else
 269                                         i = choice + 1;
 270                         }
 271                         if (i != choice) {
 272                                 /* De-highlight current item */
 273                                 print_item(list, items[(scroll + choice) * 3 + 1],
 274                                            status[scroll + choice], choice, FALSE);
 275                                 /* Highlight new item */
 276                                 choice = i;
 277                                 print_item(list, items[(scroll + choice) * 3 + 1],
 278                                            status[scroll + choice], choice, TRUE);
 279                                 wnoutrefresh(list);
 280                                 wrefresh(dialog);
 281                         }
 282                         continue;       /* wait for another key press */
 283                 }
 284                 switch (key) {
 285                 case 'H':
 286                 case 'h':
 287                 case '?':
 288                         fprintf(stderr, "%s", items[(scroll + choice) * 3]);
 289                         delwin(dialog);
 290                         free(status);
 291                         return 1;
 292                 case TAB:
 293                 case KEY_LEFT:
 294                 case KEY_RIGHT:
 295                         button = ((key == KEY_LEFT ? --button : ++button) < 0)
 296                             ? 1 : (button > 1 ? 0 : button);
 297
 298                         print_buttons(dialog, height, width, button);
 299                         wrefresh(dialog);
 300                         break;
 301                 case 'S':
 302                 case 's':
 303                 case ' ':
 304                 case '\n':
 305                         if (!button) {
 306                                 if (flag == FLAG_CHECK) {
 307                                         status[scroll + choice] = !status[scroll + choice];
 308                                         wmove(list, choice, check_x);
 309                                         wattrset(list, check_selected_attr);
 310                                         wprintw(list, "[%c]", status[scroll + choice] ? 'X' : ' ');
 311                                 } else {
 312                                         if (!status[scroll + choice]) {
 313                                                 for (i = 0; i < item_no; i++)
 314                                                         status[i] = 0;
 315                                                 status[scroll + choice] = 1;
 316                                                 for (i = 0; i < max_choice; i++)
 317                                                         print_item(list, items[(scroll + i) * 3 + 1],
 318                                                                    status[scroll + i], i, i == choice);
 319                                         }
 320                                 }
 321                                 wnoutrefresh(list);
 322                                 wrefresh(dialog);
 323
 324                                 for (i = 0; i < item_no; i++) {
 325                                         if (status[i]) {
 326                                                 if (flag == FLAG_CHECK) {
 327                                                         fprintf(stderr, "\"%s\" ", items[i * 3]);
 328                                                 } else {
 329                                                         fprintf(stderr, "%s", items[i * 3]);
 330                                                 }
 331
 332                                         }
 333                                 }
 334                         } else
 335                                 fprintf(stderr, "%s", items[(scroll + choice) * 3]);
 336                         delwin(dialog);
 337                         free(status);
 338                         return button;
 339                 case 'X':
 340                 case 'x':
 341                         key = ESC;
 342                 case ESC:
 343                         break;
 344                 }
 345
 346                 /* Now, update everything... */
 347                 doupdate();
 348         }
 349
 350         delwin(dialog);
 351         free(status);
 352         return -1;              /* ESC pressed */
 353 }