git.sur5r.net Git - u-boot/blob - 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  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 #include "dialog.h"
  13
  14 static int list_width, check_x, item_x;
  15
  16 /*
  17  * Print list item
  18  */
  19 static void print_item(WINDOW * win, int choice, int selected)
  20 {
  21         int i;
  22         char *list_item = malloc(list_width + 1);
  23
  24         strncpy(list_item, item_str(), list_width - item_x);
  25         list_item[list_width - item_x] = '\0';
  26
  27         /* Clear 'residue' of last item */
  28         wattrset(win, dlg.menubox.atr);
  29         wmove(win, choice, 0);
  30         for (i = 0; i < list_width; i++)
  31                 waddch(win, ' ');
  32
  33         wmove(win, choice, check_x);
  34         wattrset(win, selected ? dlg.check_selected.atr
  35                  : dlg.check.atr);
  36         if (!item_is_tag(':'))
  37                 wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
  38
  39         wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
  40         mvwaddch(win, choice, item_x, list_item[0]);
  41         wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
  42         waddstr(win, list_item + 1);
  43         if (selected) {
  44                 wmove(win, choice, check_x + 1);
  45                 wrefresh(win);
  46         }
  47         free(list_item);
  48 }
  49
  50 /*
  51  * Print the scroll indicators.
  52  */
  53 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
  54              int y, int x, int height)
  55 {
  56         wmove(win, y, x);
  57
  58         if (scroll > 0) {
  59                 wattrset(win, dlg.uarrow.atr);
  60                 waddch(win, ACS_UARROW);
  61                 waddstr(win, "(-)");
  62         } else {
  63                 wattrset(win, dlg.menubox.atr);
  64                 waddch(win, ACS_HLINE);
  65                 waddch(win, ACS_HLINE);
  66                 waddch(win, ACS_HLINE);
  67                 waddch(win, ACS_HLINE);
  68         }
  69
  70         y = y + height + 1;
  71         wmove(win, y, x);
  72
  73         if ((height < item_no) && (scroll + choice < item_no - 1)) {
  74                 wattrset(win, dlg.darrow.atr);
  75                 waddch(win, ACS_DARROW);
  76                 waddstr(win, "(+)");
  77         } else {
  78                 wattrset(win, dlg.menubox_border.atr);
  79                 waddch(win, ACS_HLINE);
  80                 waddch(win, ACS_HLINE);
  81                 waddch(win, ACS_HLINE);
  82                 waddch(win, ACS_HLINE);
  83         }
  84 }
  85
  86 /*
  87  *  Display the termination buttons
  88  */
  89 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  90 {
  91         int x = width / 2 - 11;
  92         int y = height - 2;
  93
  94         print_button(dialog, gettext("Select"), y, x, selected == 0);
  95         print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
  96
  97         wmove(dialog, y, x + 1 + 14 * selected);
  98         wrefresh(dialog);
  99 }
 100
 101 /*
 102  * Display a dialog box with a list of options that can be turned on or off
 103  * in the style of radiolist (only one option turned on at a time).
 104  */
 105 int dialog_checklist(const char *title, const char *prompt, int height,
 106                      int width, int list_height)
 107 {
 108         int i, x, y, box_x, box_y;
 109         int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
 110         WINDOW *dialog, *list;
 111
 112         /* which item to highlight */
 113         item_foreach() {
 114                 if (item_is_tag('X'))
 115                         choice = item_n();
 116                 if (item_is_selected()) {
 117                         choice = item_n();
 118                         break;
 119                 }
 120         }
 121
 122 do_resize:
 123         if (getmaxy(stdscr) < (height + CHECKLIST_HEIGTH_MIN))
 124                 return -ERRDISPLAYTOOSMALL;
 125         if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
 126                 return -ERRDISPLAYTOOSMALL;
 127
 128         max_choice = MIN(list_height, item_count());
 129
 130         /* center dialog box on screen */
 131         x = (getmaxx(stdscr) - width) / 2;
 132         y = (getmaxy(stdscr) - 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         check_x = MIN(check_x, list_width);
 172
 173         check_x = (list_width - check_x) / 2;
 174         item_x = check_x + 4;
 175
 176         if (choice >= list_height) {
 177                 scroll = choice - list_height + 1;
 178                 choice -= scroll;
 179         }
 180
 181         /* Print the list */
 182         for (i = 0; i < max_choice; i++) {
 183                 item_set(scroll + i);
 184                 print_item(list, i, i == choice);
 185         }
 186
 187         print_arrows(dialog, choice, item_count(), scroll,
 188                      box_y, box_x + check_x + 5, list_height);
 189
 190         print_buttons(dialog, height, width, 0);
 191
 192         wnoutrefresh(dialog);
 193         wnoutrefresh(list);
 194         doupdate();
 195
 196         while (key != KEY_ESC) {
 197                 key = wgetch(dialog);
 198
 199                 for (i = 0; i < max_choice; i++) {
 200                         item_set(i + scroll);
 201                         if (toupper(key) == toupper(item_str()[0]))
 202                                 break;
 203                 }
 204
 205                 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
 206                     key == '+' || key == '-') {
 207                         if (key == KEY_UP || key == '-') {
 208                                 if (!choice) {
 209                                         if (!scroll)
 210                                                 continue;
 211                                         /* Scroll list down */
 212                                         if (list_height > 1) {
 213                                                 /* De-highlight current first item */
 214                                                 item_set(scroll);
 215                                                 print_item(list, 0, FALSE);
 216                                                 scrollok(list, TRUE);
 217                                                 wscrl(list, -1);
 218                                                 scrollok(list, FALSE);
 219                                         }
 220                                         scroll--;
 221                                         item_set(scroll);
 222                                         print_item(list, 0, TRUE);
 223                                         print_arrows(dialog, choice, item_count(),
 224                                                      scroll, box_y, box_x + check_x + 5, list_height);
 225
 226                                         wnoutrefresh(dialog);
 227                                         wrefresh(list);
 228
 229                                         continue;       /* wait for another key press */
 230                                 } else
 231                                         i = choice - 1;
 232                         } else if (key == KEY_DOWN || key == '+') {
 233                                 if (choice == max_choice - 1) {
 234                                         if (scroll + choice >= item_count() - 1)
 235                                                 continue;
 236                                         /* Scroll list up */
 237                                         if (list_height > 1) {
 238                                                 /* De-highlight current last item before scrolling up */
 239                                                 item_set(scroll + max_choice - 1);
 240                                                 print_item(list,
 241                                                             max_choice - 1,
 242                                                             FALSE);
 243                                                 scrollok(list, TRUE);
 244                                                 wscrl(list, 1);
 245                                                 scrollok(list, FALSE);
 246                                         }
 247                                         scroll++;
 248                                         item_set(scroll + max_choice - 1);
 249                                         print_item(list, max_choice - 1, TRUE);
 250
 251                                         print_arrows(dialog, choice, item_count(),
 252                                                      scroll, box_y, box_x + check_x + 5, list_height);
 253
 254                                         wnoutrefresh(dialog);
 255                                         wrefresh(list);
 256
 257                                         continue;       /* wait for another key press */
 258                                 } else
 259                                         i = choice + 1;
 260                         }
 261                         if (i != choice) {
 262                                 /* De-highlight current item */
 263                                 item_set(scroll + choice);
 264                                 print_item(list, choice, FALSE);
 265                                 /* Highlight new item */
 266                                 choice = i;
 267                                 item_set(scroll + choice);
 268                                 print_item(list, choice, TRUE);
 269                                 wnoutrefresh(dialog);
 270                                 wrefresh(list);
 271                         }
 272                         continue;       /* wait for another key press */
 273                 }
 274                 switch (key) {
 275                 case 'H':
 276                 case 'h':
 277                 case '?':
 278                         button = 1;
 279                         /* fall-through */
 280                 case 'S':
 281                 case 's':
 282                 case ' ':
 283                 case '\n':
 284                         item_foreach()
 285                                 item_set_selected(0);
 286                         item_set(scroll + choice);
 287                         item_set_selected(1);
 288                         delwin(list);
 289                         delwin(dialog);
 290                         return button;
 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 'X':
 301                 case 'x':
 302                         key = KEY_ESC;
 303                         break;
 304                 case KEY_ESC:
 305                         key = on_key_esc(dialog);
 306                         break;
 307                 case KEY_RESIZE:
 308                         delwin(list);
 309                         delwin(dialog);
 310                         on_key_resize();
 311                         goto do_resize;
 312                 }
 313
 314                 /* Now, update everything... */
 315                 doupdate();
 316         }
 317         delwin(list);
 318         delwin(dialog);
 319         return key;             /* ESC pressed */
 320 }