LXR uboot/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
  14static int list_width, check_x, item_x;
  15
  16/*
  17 * Print list item
  18 */
  19static 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 */
  53static 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 */
  89static 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 */
 105int 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
 122do_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}
 321