scripts/kconfig/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;
  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, dlg.menubox.atr);
  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 ? dlg.check_selected.atr
  44                  : dlg.check.atr);
  45         wprintw(win, "(%c)", status ? 'X' : ' ');
  46
  47         wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
  48         mvwaddch(win, choice, item_x, item[0]);
  49         wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
  50         waddstr(win, (char *)item + 1);
  51         if (selected) {
  52                 wmove(win, choice, check_x + 1);
  53                 wrefresh(win);
  54         }
  55 }
  56
  57 /*
  58  * Print the scroll indicators.
  59  */
  60 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
  61              int y, int x, int height)
  62 {
  63         wmove(win, y, x);
  64
  65         if (scroll > 0) {
  66                 wattrset(win, dlg.uarrow.atr);
  67                 waddch(win, ACS_UARROW);
  68                 waddstr(win, "(-)");
  69         } else {
  70                 wattrset(win, dlg.menubox.atr);
  71                 waddch(win, ACS_HLINE);
  72                 waddch(win, ACS_HLINE);
  73                 waddch(win, ACS_HLINE);
  74                 waddch(win, ACS_HLINE);
  75         }
  76
  77         y = y + height + 1;
  78         wmove(win, y, x);
  79
  80         if ((height < item_no) && (scroll + choice < item_no - 1)) {
  81                 wattrset(win, dlg.darrow.atr);
  82                 waddch(win, ACS_DARROW);
  83                 waddstr(win, "(+)");
  84         } else {
  85                 wattrset(win, dlg.menubox_border.atr);
  86                 waddch(win, ACS_HLINE);
  87                 waddch(win, ACS_HLINE);
  88                 waddch(win, ACS_HLINE);
  89                 waddch(win, ACS_HLINE);
  90         }
  91 }
  92
  93 /*
  94  *  Display the termination buttons
  95  */
  96 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  97 {
  98         int x = width / 2 - 11;
  99         int y = height - 2;
 100
 101         print_button(dialog, "Select", y, x, selected == 0);
 102         print_button(dialog, " Help ", y, x + 14, selected == 1);
 103
 104         wmove(dialog, y, x + 1 + 14 * selected);
 105         wrefresh(dialog);
 106 }
 107
 108 /*
 109  * Display a dialog box with a list of options that can be turned on or off
 110  * in the style of radiolist (only one option turned on at a time).
 111  */
 112 int dialog_checklist(const char *title, const char *prompt, int height,
 113                      int width, int list_height, int item_no,
 114                      const char *const *items)
 115 {
 116         int i, x, y, box_x, box_y;
 117         int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
 118         WINDOW *dialog, *list;
 119
 120         /* Allocate space for storing item on/off status */
 121         if ((status = malloc(sizeof(int) * item_no)) == NULL) {
 122                 endwin();
 123                 fprintf(stderr,
 124                         "\nCan't allocate memory in dialog_checklist().\n");
 125                 exit(-1);
 126         }
 127
 128         /* Initializes status */
 129         for (i = 0; i < item_no; i++) {
 130                 status[i] = !strcasecmp(items[i * 3 + 2], "on");
 131                 if ((!choice && status[i])
 132                     || !strcasecmp(items[i * 3 + 2], "selected"))
 133                         choice = i + 1;
 134         }
 135         if (choice)
 136                 choice--;
 137
 138         max_choice = MIN(list_height, item_no);
 139
 140         /* center dialog box on screen */
 141         x = (COLS - width) / 2;
 142         y = (LINES - height) / 2;
 143
 144         draw_shadow(stdscr, y, x, height, width);
 145
 146         dialog = newwin(height, width, y, x);
 147         keypad(dialog, TRUE);
 148
 149         draw_box(dialog, 0, 0, height, width,
 150                  dlg.dialog.atr, dlg.border.atr);
 151         wattrset(dialog, dlg.border.atr);
 152         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
 153         for (i = 0; i < width - 2; i++)
 154                 waddch(dialog, ACS_HLINE);
 155         wattrset(dialog, dlg.dialog.atr);
 156         waddch(dialog, ACS_RTEE);
 157
 158         print_title(dialog, title, width);
 159
 160         wattrset(dialog, dlg.dialog.atr);
 161         print_autowrap(dialog, prompt, width - 2, 1, 3);
 162
 163         list_width = width - 6;
 164         box_y = height - list_height - 5;
 165         box_x = (width - list_width) / 2 - 1;
 166
 167         /* create new window for the list */
 168         list = subwin(dialog, list_height, list_width, y + box_y + 1,
 169                       x + box_x + 1);
 170
 171         keypad(list, TRUE);
 172
 173         /* draw a box around the list items */
 174         draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
 175                  dlg.menubox_border.atr, dlg.menubox.atr);
 176
 177         /* Find length of longest item in order to center checklist */
 178         check_x = 0;
 179         for (i = 0; i < item_no; i++)
 180                 check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
 181
 182         check_x = (list_width - check_x) / 2;
 183         item_x = check_x + 4;
 184
 185         if (choice >= list_height) {
 186                 scroll = choice - list_height + 1;
 187                 choice -= scroll;
 188         }
 189
 190         /* Print the list */
 191         for (i = 0; i < max_choice; i++) {
 192                 if (i != choice)
 193                         print_item(list, items[(scroll + i) * 3 + 1],
 194                                    status[i + scroll], i, 0);
 195         }
 196         print_item(list, items[(scroll + choice) * 3 + 1],
 197                    status[choice + scroll], choice, 1);
 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(dialog);
 205         wnoutrefresh(list);
 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                                         print_arrows(dialog, choice, item_no,
 234                                                      scroll, box_y, box_x + check_x + 5, list_height);
 235
 236                                         wnoutrefresh(dialog);
 237                                         wrefresh(list);
 238
 239                                         continue;       /* wait for another key press */
 240                                 } else
 241                                         i = choice - 1;
 242                         } else if (key == KEY_DOWN || key == '+') {
 243                                 if (choice == max_choice - 1) {
 244                                         if (scroll + choice >= item_no - 1)
 245                                                 continue;
 246                                         /* Scroll list up */
 247                                         if (list_height > 1) {
 248                                                 /* De-highlight current last item before scrolling up */
 249                                                 print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
 250                                                            status[scroll + max_choice - 1],
 251                                                            max_choice - 1, FALSE);
 252                                                 scrollok(list, TRUE);
 253                                                 wscrl(list, 1);
 254                                                 scrollok(list, FALSE);
 255                                         }
 256                                         scroll++;
 257                                         print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
 258                                                    status[scroll + max_choice - 1], max_choice - 1, TRUE);
 259
 260                                         print_arrows(dialog, choice, item_no,
 261                                                      scroll, box_y, box_x + check_x + 5, list_height);
 262
 263                                         wnoutrefresh(dialog);
 264                                         wrefresh(list);
 265
 266                                         continue;       /* wait for another key press */
 267                                 } else
 268                                         i = choice + 1;
 269                         }
 270                         if (i != choice) {
 271                                 /* De-highlight current item */
 272                                 print_item(list, items[(scroll + choice) * 3 + 1],
 273                                            status[scroll + choice], choice, FALSE);
 274                                 /* Highlight new item */
 275                                 choice = i;
 276                                 print_item(list, items[(scroll + choice) * 3 + 1],
 277                                            status[scroll + choice], choice, TRUE);
 278                                 wnoutrefresh(dialog);
 279                                 wrefresh(list);
 280                         }
 281                         continue;       /* wait for another key press */
 282                 }
 283                 switch (key) {
 284                 case 'H':
 285                 case 'h':
 286                 case '?':
 287                         fprintf(stderr, "%s", items[(scroll + choice) * 3]);
 288                         delwin(dialog);
 289                         free(status);
 290                         return 1;
 291                 case TAB:
 292                 case KEY_LEFT:
 293                 case KEY_RIGHT:
 294                         button = ((key == KEY_LEFT ? --button : ++button) < 0)
 295                             ? 1 : (button > 1 ? 0 : button);
 296
 297                         print_buttons(dialog, height, width, button);
 298                         wrefresh(dialog);
 299                         break;
 300                 case 'S':
 301                 case 's':
 302                 case ' ':
 303                 case '\n':
 304                         if (!button) {
 305                                 if (!status[scroll + choice]) {
 306                                         for (i = 0; i < item_no; i++)
 307                                                 status[i] = 0;
 308                                         status[scroll + choice] = 1;
 309                                         for (i = 0; i < max_choice; i++)
 310                                                 print_item(list, items[(scroll + i) * 3 + 1],
 311                                                            status[scroll + i], i, i == choice);
 312                                 }
 313                                 wnoutrefresh(dialog);
 314                                 wrefresh(list);
 315
 316                                 for (i = 0; i < item_no; i++)
 317                                         if (status[i])
 318                                                 fprintf(stderr, "%s", items[i * 3]);
 319                         } else
 320                                 fprintf(stderr, "%s", items[(scroll + choice) * 3]);
 321                         delwin(dialog);
 322                         free(status);
 323                         return button;
 324                 case 'X':
 325                 case 'x':
 326                         key = ESC;
 327                 case ESC:
 328                         break;
 329                 }
 330
 331                 /* Now, update everything... */
 332                 doupdate();
 333         }
 334
 335         delwin(dialog);
 336         free(status);
 337         return -1;              /* ESC pressed */
 338 }