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         wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
  45
  46         wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
  47         mvwaddch(win, choice, item_x, item_str()[0]);
  48         wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
  49         waddstr(win, (char *)item_str() + 1);
  50         if (selected) {
  51                 wmove(win, choice, check_x + 1);
  52                 wrefresh(win);
  53         }
  54 }
  55
  56 /*
  57  * Print the scroll indicators.
  58  */
  59 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
  60              int y, int x, int height)
  61 {
  62         wmove(win, y, x);
  63
  64         if (scroll > 0) {
  65                 wattrset(win, dlg.uarrow.atr);
  66                 waddch(win, ACS_UARROW);
  67                 waddstr(win, "(-)");
  68         } else {
  69                 wattrset(win, dlg.menubox.atr);
  70                 waddch(win, ACS_HLINE);
  71                 waddch(win, ACS_HLINE);
  72                 waddch(win, ACS_HLINE);
  73                 waddch(win, ACS_HLINE);
  74         }
  75
  76         y = y + height + 1;
  77         wmove(win, y, x);
  78
  79         if ((height < item_no) && (scroll + choice < item_no - 1)) {
  80                 wattrset(win, dlg.darrow.atr);
  81                 waddch(win, ACS_DARROW);
  82                 waddstr(win, "(+)");
  83         } else {
  84                 wattrset(win, dlg.menubox_border.atr);
  85                 waddch(win, ACS_HLINE);
  86                 waddch(win, ACS_HLINE);
  87                 waddch(win, ACS_HLINE);
  88                 waddch(win, ACS_HLINE);
  89         }
  90 }
  91
  92 /*
  93  *  Display the termination buttons
  94  */
  95 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  96 {
  97         int x = width / 2 - 11;
  98         int y = height - 2;
  99
 100         print_button(dialog, "Select", y, x, selected == 0);
 101         print_button(dialog, " Help ", y, x + 14, selected == 1);
 102
 103         wmove(dialog, y, x + 1 + 14 * selected);
 104         wrefresh(dialog);
 105 }
 106
 107 /*
 108  * Display a dialog box with a list of options that can be turned on or off
 109  * in the style of radiolist (only one option turned on at a time).
 110  */
 111 int dialog_checklist(const char *title, const char *prompt, int height,
 112                      int width, int list_height)
 113 {
 114         int i, x, y, box_x, box_y;
 115         int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
 116         WINDOW *dialog, *list;
 117
 118         /* which item to highlight */
 119         item_foreach() {
 120                 if (item_is_tag('X'))
 121                         choice = item_n();
 122                 if (item_is_selected()) {
 123                         choice = item_n();
 124                         break;
 125                 }
 126         }
 127
 128         max_choice = MIN(list_height, item_count());
 129
 130         /* center dialog box on screen */
 131         x = (COLS - width) / 2;
 132         y = (LINES - height) / 2;
 133
 134         draw_shadow(stdscr, y, x, height, width);
 135
 136         dialog = newwin(height, width, y, x);
 137         keypad(dialog, TRUE);
 138
 139         draw_box(dialog, 0, 0, height, width,
 140                  dlg.dialog.atr, dlg.border.atr);
 141         wattrset(dialog, dlg.border.atr);
 142         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
 143         for (i = 0; i < width - 2; i++)
 144                 waddch(dialog, ACS_HLINE);
 145         wattrset(dialog, dlg.dialog.atr);
 146         waddch(dialog, ACS_RTEE);
 147
 148         print_title(dialog, title, width);
 149
 150         wattrset(dialog, dlg.dialog.atr);
 151         print_autowrap(dialog, prompt, width - 2, 1, 3);
 152
 153         list_width = width - 6;
 154         box_y = height - list_height - 5;
 155         box_x = (width - list_width) / 2 - 1;
 156
 157         /* create new window for the list */
 158         list = subwin(dialog, list_height, list_width, y + box_y + 1,
 159                       x + box_x + 1);
 160
 161         keypad(list, TRUE);
 162
 163         /* draw a box around the list items */
 164         draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
 165                  dlg.menubox_border.atr, dlg.menubox.atr);
 166
 167         /* Find length of longest item in order to center checklist */
 168         check_x = 0;
 169         item_foreach()
 170                 check_x = MAX(check_x, strlen(item_str()) + 4);
 171
 172         check_x = (list_width - check_x) / 2;
 173         item_x = check_x + 4;
 174
 175         if (choice >= list_height) {
 176                 scroll = choice - list_height + 1;
 177                 choice -= scroll;
 178         }
 179
 180         /* Print the list */
 181         for (i = 0; i < max_choice; i++) {
 182                 item_set(scroll + i);
 183                 print_item(list, i, i == choice);
 184         }
 185
 186         print_arrows(dialog, choice, item_count(), scroll,
 187                      box_y, box_x + check_x + 5, list_height);
 188
 189         print_buttons(dialog, height, width, 0);
 190
 191         wnoutrefresh(dialog);
 192         wnoutrefresh(list);
 193         doupdate();
 194
 195         while (key != ESC) {
 196                 key = wgetch(dialog);
 197
 198                 for (i = 0; i < max_choice; i++) {
 199                         item_set(i + scroll);
 200                         if (toupper(key) == toupper(item_str()[0]))
 201                                 break;
 202                 }
 203
 204                 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
 205                     key == '+' || key == '-') {
 206                         if (key == KEY_UP || key == '-') {
 207                                 if (!choice) {
 208                                         if (!scroll)
 209                                                 continue;
 210                                         /* Scroll list down */
 211                                         if (list_height > 1) {
 212                                                 /* De-highlight current first item */
 213                                                 item_set(scroll);
 214                                                 print_item(list, 0, FALSE);
 215                                                 scrollok(list, TRUE);
 216                                                 wscrl(list, -1);
 217                                                 scrollok(list, FALSE);
 218                                         }
 219                                         scroll--;
 220                                         item_set(scroll);
 221                                         print_item(list, 0, TRUE);
 222                                         print_arrows(dialog, choice, item_count(),
 223                                                      scroll, box_y, box_x + check_x + 5, list_height);
 224
 225                                         wnoutrefresh(dialog);
 226                                         wrefresh(list);
 227
 228                                         continue;       /* wait for another key press */
 229                                 } else
 230                                         i = choice - 1;
 231                         } else if (key == KEY_DOWN || key == '+') {
 232                                 if (choice == max_choice - 1) {
 233                                         if (scroll + choice >= item_count() - 1)
 234                                                 continue;
 235                                         /* Scroll list up */
 236                                         if (list_height > 1) {
 237                                                 /* De-highlight current last item before scrolling up */
 238                                                 item_set(scroll + max_choice - 1);
 239                                                 print_item(list,
 240                                                             max_choice - 1,
 241                                                             FALSE);
 242                                                 scrollok(list, TRUE);
 243                                                 wscrl(list, 1);
 244                                                 scrollok(list, FALSE);
 245                                         }
 246                                         scroll++;
 247                                         item_set(scroll + max_choice - 1);
 248                                         print_item(list, max_choice - 1, TRUE);
 249
 250                                         print_arrows(dialog, choice, item_count(),
 251                                                      scroll, box_y, box_x + check_x + 5, list_height);
 252
 253                                         wnoutrefresh(dialog);
 254                                         wrefresh(list);
 255
 256                                         continue;       /* wait for another key press */
 257                                 } else
 258                                         i = choice + 1;
 259                         }
 260                         if (i != choice) {
 261                                 /* De-highlight current item */
 262                                 item_set(scroll + choice);
 263                                 print_item(list, choice, FALSE);
 264                                 /* Highlight new item */
 265                                 choice = i;
 266                                 item_set(scroll + choice);
 267                                 print_item(list, choice, TRUE);
 268                                 wnoutrefresh(dialog);
 269                                 wrefresh(list);
 270                         }
 271                         continue;       /* wait for another key press */
 272                 }
 273                 switch (key) {
 274                 case 'H':
 275                 case 'h':
 276                 case '?':
 277                         button = 1;
 278                         /* fall-through */
 279                 case 'S':
 280                 case 's':
 281                 case ' ':
 282                 case '\n':
 283                         item_foreach()
 284                                 item_set_selected(0);
 285                         item_set(scroll + choice);
 286                         item_set_selected(1);
 287                         delwin(list);
 288                         delwin(dialog);
 289                         return button;
 290                 case TAB:
 291                 case KEY_LEFT:
 292                 case KEY_RIGHT:
 293                         button = ((key == KEY_LEFT ? --button : ++button) < 0)
 294                             ? 1 : (button > 1 ? 0 : button);
 295
 296                         print_buttons(dialog, height, width, button);
 297                         wrefresh(dialog);
 298                         break;
 299                 case 'X':
 300                 case 'x':
 301                         key = ESC;
 302                 case ESC:
 303                         break;
 304                 }
 305
 306                 /* Now, update everything... */
 307                 doupdate();
 308         }
 309         delwin(list);
 310         delwin(dialog);
 311         return 255;             /* ESC pressed */
 312 }