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, int choice, int selected)
  32 {
  33         int i;
  34
  35         /* Clear 'residue' of last item */
  36         wattrset(win, dlg.menubox.atr);
  37         wmove(win, choice, 0);
  38         for (i = 0; i < list_width; i++)
  39                 waddch(win, ' ');
  40
  41         wmove(win, choice, check_x);
  42         wattrset(win, selected ? dlg.check_selected.atr
  43                  : dlg.check.atr);
  44         if (!item_is_tag(':'))
  45                 wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
  46
  47         wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
  48         mvwaddch(win, choice, item_x, item_str()[0]);
  49         wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
  50         waddstr(win, (char *)item_str() + 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, gettext("Select"), y, x, selected == 0);
 102         print_button(dialog, gettext(" 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)
 114 {
 115         int i, x, y, box_x, box_y;
 116         int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
 117         WINDOW *dialog, *list;
 118
 119         /* which item to highlight */
 120         item_foreach() {
 121                 if (item_is_tag('X'))
 122                         choice = item_n();
 123                 if (item_is_selected()) {
 124                         choice = item_n();
 125                         break;
 126                 }
 127         }
 128
 129 do_resize:
 130         if (getmaxy(stdscr) < (height + 6))
 131                 return -ERRDISPLAYTOOSMALL;
 132         if (getmaxx(stdscr) < (width + 6))
 133                 return -ERRDISPLAYTOOSMALL;
 134
 135         max_choice = MIN(list_height, item_count());
 136
 137         /* center dialog box on screen */
 138         x = (COLS - width) / 2;
 139         y = (LINES - height) / 2;
 140
 141         draw_shadow(stdscr, y, x, height, width);
 142
 143         dialog = newwin(height, width, y, x);
 144         keypad(dialog, TRUE);
 145
 146         draw_box(dialog, 0, 0, height, width,
 147                  dlg.dialog.atr, dlg.border.atr);
 148         wattrset(dialog, dlg.border.atr);
 149         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
 150         for (i = 0; i < width - 2; i++)
 151                 waddch(dialog, ACS_HLINE);
 152         wattrset(dialog, dlg.dialog.atr);
 153         waddch(dialog, ACS_RTEE);
 154
 155         print_title(dialog, title, width);
 156
 157         wattrset(dialog, dlg.dialog.atr);
 158         print_autowrap(dialog, prompt, width - 2, 1, 3);
 159
 160         list_width = width - 6;
 161         box_y = height - list_height - 5;
 162         box_x = (width - list_width) / 2 - 1;
 163
 164         /* create new window for the list */
 165         list = subwin(dialog, list_height, list_width, y + box_y + 1,
 166                       x + box_x + 1);
 167
 168         keypad(list, TRUE);
 169
 170         /* draw a box around the list items */
 171         draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
 172                  dlg.menubox_border.atr, dlg.menubox.atr);
 173
 174         /* Find length of longest item in order to center checklist */
 175         check_x = 0;
 176         item_foreach()
 177                 check_x = MAX(check_x, strlen(item_str()) + 4);
 178
 179         check_x = (list_width - check_x) / 2;
 180         item_x = check_x + 4;
 181
 182         if (choice >= list_height) {
 183                 scroll = choice - list_height + 1;
 184                 choice -= scroll;
 185         }
 186
 187         /* Print the list */
 188         for (i = 0; i < max_choice; i++) {
 189                 item_set(scroll + i);
 190                 print_item(list, i, i == choice);
 191         }
 192
 193         print_arrows(dialog, choice, item_count(), scroll,
 194                      box_y, box_x + check_x + 5, list_height);
 195
 196         print_buttons(dialog, height, width, 0);
 197
 198         wnoutrefresh(dialog);
 199         wnoutrefresh(list);
 200         doupdate();
 201
 202         while (key != KEY_ESC) {
 203                 key = wgetch(dialog);
 204
 205                 for (i = 0; i < max_choice; i++) {
 206                         item_set(i + scroll);
 207                         if (toupper(key) == toupper(item_str()[0]))
 208                                 break;
 209                 }
 210
 211                 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
 212                     key == '+' || key == '-') {
 213                         if (key == KEY_UP || key == '-') {
 214                                 if (!choice) {
 215                                         if (!scroll)
 216                                                 continue;
 217                                         /* Scroll list down */
 218                                         if (list_height > 1) {
 219                                                 /* De-highlight current first item */
 220                                                 item_set(scroll);
 221                                                 print_item(list, 0, FALSE);
 222                                                 scrollok(list, TRUE);
 223                                                 wscrl(list, -1);
 224                                                 scrollok(list, FALSE);
 225                                         }
 226                                         scroll--;
 227                                         item_set(scroll);
 228                                         print_item(list, 0, TRUE);
 229                                         print_arrows(dialog, choice, item_count(),
 230                                                      scroll, box_y, box_x + check_x + 5, list_height);
 231
 232                                         wnoutrefresh(dialog);
 233                                         wrefresh(list);
 234
 235                                         continue;       /* wait for another key press */
 236                                 } else
 237                                         i = choice - 1;
 238                         } else if (key == KEY_DOWN || key == '+') {
 239                                 if (choice == max_choice - 1) {
 240                                         if (scroll + choice >= item_count() - 1)
 241                                                 continue;
 242                                         /* Scroll list up */
 243                                         if (list_height > 1) {
 244                                                 /* De-highlight current last item before scrolling up */
 245                                                 item_set(scroll + max_choice - 1);
 246                                                 print_item(list,
 247                                                             max_choice - 1,
 248                                                             FALSE);
 249                                                 scrollok(list, TRUE);
 250                                                 wscrl(list, 1);
 251                                                 scrollok(list, FALSE);
 252                                         }
 253                                         scroll++;
 254                                         item_set(scroll + max_choice - 1);
 255                                         print_item(list, max_choice - 1, TRUE);
 256
 257                                         print_arrows(dialog, choice, item_count(),
 258                                                      scroll, box_y, box_x + check_x + 5, list_height);
 259
 260                                         wnoutrefresh(dialog);
 261                                         wrefresh(list);
 262
 263                                         continue;       /* wait for another key press */
 264                                 } else
 265                                         i = choice + 1;
 266                         }
 267                         if (i != choice) {
 268                                 /* De-highlight current item */
 269                                 item_set(scroll + choice);
 270                                 print_item(list, choice, FALSE);
 271                                 /* Highlight new item */
 272                                 choice = i;
 273                                 item_set(scroll + choice);
 274                                 print_item(list, choice, TRUE);
 275                                 wnoutrefresh(dialog);
 276                                 wrefresh(list);
 277                         }
 278                         continue;       /* wait for another key press */
 279                 }
 280                 switch (key) {
 281                 case 'H':
 282                 case 'h':
 283                 case '?':
 284                         button = 1;
 285                         /* fall-through */
 286                 case 'S':
 287                 case 's':
 288                 case ' ':
 289                 case '\n':
 290                         item_foreach()
 291                                 item_set_selected(0);
 292                         item_set(scroll + choice);
 293                         item_set_selected(1);
 294                         delwin(list);
 295                         delwin(dialog);
 296                         return button;
 297                 case TAB:
 298                 case KEY_LEFT:
 299                 case KEY_RIGHT:
 300                         button = ((key == KEY_LEFT ? --button : ++button) < 0)
 301                             ? 1 : (button > 1 ? 0 : button);
 302
 303                         print_buttons(dialog, height, width, button);
 304                         wrefresh(dialog);
 305                         break;
 306                 case 'X':
 307                 case 'x':
 308                         key = KEY_ESC;
 309                         break;
 310                 case KEY_ESC:
 311                         key = on_key_esc(dialog);
 312                         break;
 313                 case KEY_RESIZE:
 314                         delwin(list);
 315                         delwin(dialog);
 316                         on_key_resize();
 317                         goto do_resize;
 318                 }
 319
 320                 /* Now, update everything... */
 321                 doupdate();
 322         }
 323         delwin(list);
 324         delwin(dialog);
 325         return key;             /* ESC pressed */
 326 }