LXR uboot/scripts/kconfig/lxdialog/checklist.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 *  checklist.c -- implements the checklist box
   4 *
   5 *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
   6 *     Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
   7 *     Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
   8 *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
   9 */
  10
  11#include "dialog.h"
  12
  13static int list_width, check_x, item_x;
  14
  15/*
  16 * Print list item
  17 */
  18static void print_item(WINDOW * win, int choice, int selected)
  19{
  20        int i;
  21        char *list_item = malloc(list_width + 1);
  22
  23        strncpy(list_item, item_str(), list_width - item_x);
  24        list_item[list_width - item_x] = '\0';
  25
  26        /* Clear 'residue' of last item */
  27        wattrset(win, dlg.menubox.atr);
  28        wmove(win, choice, 0);
  29        for (i = 0; i < list_width; i++)
  30                waddch(win, ' ');
  31
  32        wmove(win, choice, check_x);
  33        wattrset(win, selected ? dlg.check_selected.atr
  34                 : dlg.check.atr);
  35        if (!item_is_tag(':'))
  36                wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
  37
  38        wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
  39        mvwaddch(win, choice, item_x, list_item[0]);
  40        wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
  41        waddstr(win, list_item + 1);
  42        if (selected) {
  43                wmove(win, choice, check_x + 1);
  44                wrefresh(win);
  45        }
  46        free(list_item);
  47}
  48
  49/*
  50 * Print the scroll indicators.
  51 */
  52static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
  53             int y, int x, int height)
  54{
  55        wmove(win, y, x);
  56
  57        if (scroll > 0) {
  58                wattrset(win, dlg.uarrow.atr);
  59                waddch(win, ACS_UARROW);
  60                waddstr(win, "(-)");
  61        } else {
  62                wattrset(win, dlg.menubox.atr);
  63                waddch(win, ACS_HLINE);
  64                waddch(win, ACS_HLINE);
  65                waddch(win, ACS_HLINE);
  66                waddch(win, ACS_HLINE);
  67        }
  68
  69        y = y + height + 1;
  70        wmove(win, y, x);
  71
  72        if ((height < item_no) && (scroll + choice < item_no - 1)) {
  73                wattrset(win, dlg.darrow.atr);
  74                waddch(win, ACS_DARROW);
  75                waddstr(win, "(+)");
  76        } else {
  77                wattrset(win, dlg.menubox_border.atr);
  78                waddch(win, ACS_HLINE);
  79                waddch(win, ACS_HLINE);
  80                waddch(win, ACS_HLINE);
  81                waddch(win, ACS_HLINE);
  82        }
  83}
  84
  85/*
  86 *  Display the termination buttons
  87 */
  88static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  89{
  90        int x = width / 2 - 11;
  91        int y = height - 2;
  92
  93        print_button(dialog, "Select", y, x, selected == 0);
  94        print_button(dialog, " Help ", y, x + 14, selected == 1);
  95
  96        wmove(dialog, y, x + 1 + 14 * selected);
  97        wrefresh(dialog);
  98}
  99
 100/*
 101 * Display a dialog box with a list of options that can be turned on or off
 102 * in the style of radiolist (only one option turned on at a time).
 103 */
 104int dialog_checklist(const char *title, const char *prompt, int height,
 105                     int width, int list_height)
 106{
 107        int i, x, y, box_x, box_y;
 108        int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
 109        WINDOW *dialog, *list;
 110
 111        /* which item to highlight */
 112        item_foreach() {
 113                if (item_is_tag('X'))
 114                        choice = item_n();
 115                if (item_is_selected()) {
 116                        choice = item_n();
 117                        break;
 118                }
 119        }
 120
 121do_resize:
 122        if (getmaxy(stdscr) < (height + CHECKLIST_HEIGTH_MIN))
 123                return -ERRDISPLAYTOOSMALL;
 124        if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
 125                return -ERRDISPLAYTOOSMALL;
 126
 127        max_choice = MIN(list_height, item_count());
 128
 129        /* center dialog box on screen */
 130        x = (getmaxx(stdscr) - width) / 2;
 131        y = (getmaxy(stdscr) - height) / 2;
 132
 133        draw_shadow(stdscr, y, x, height, width);
 134
 135        dialog = newwin(height, width, y, x);
 136        keypad(dialog, TRUE);
 137
 138        draw_box(dialog, 0, 0, height, width,
 139                 dlg.dialog.atr, dlg.border.atr);
 140        wattrset(dialog, dlg.border.atr);
 141        mvwaddch(dialog, height - 3, 0, ACS_LTEE);
 142        for (i = 0; i < width - 2; i++)
 143                waddch(dialog, ACS_HLINE);
 144        wattrset(dialog, dlg.dialog.atr);
 145        waddch(dialog, ACS_RTEE);
 146
 147        print_title(dialog, title, width);
 148
 149        wattrset(dialog, dlg.dialog.atr);
 150        print_autowrap(dialog, prompt, width - 2, 1, 3);
 151
 152        list_width = width - 6;
 153        box_y = height - list_height - 5;
 154        box_x = (width - list_width) / 2 - 1;
 155
 156        /* create new window for the list */
 157        list = subwin(dialog, list_height, list_width, y + box_y + 1,
 158                      x + box_x + 1);
 159
 160        keypad(list, TRUE);
 161
 162        /* draw a box around the list items */
 163        draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
 164                 dlg.menubox_border.atr, dlg.menubox.atr);
 165
 166        /* Find length of longest item in order to center checklist */
 167        check_x = 0;
 168        item_foreach()
 169                check_x = MAX(check_x, strlen(item_str()) + 4);
 170        check_x = MIN(check_x, list_width);
 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 != 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 = KEY_ESC;
 302                        break;
 303                case KEY_ESC:
 304                        key = on_key_esc(dialog);
 305                        break;
 306                case KEY_RESIZE:
 307                        delwin(list);
 308                        delwin(dialog);
 309                        on_key_resize();
 310                        goto do_resize;
 311                }
 312
 313                /* Now, update everything... */
 314                doupdate();
 315        }
 316        delwin(list);
 317        delwin(dialog);
 318        return key;             /* ESC pressed */
 319}
 320