LXR busybox/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
  26static int list_width, check_x, item_x;
  27
  28/*
  29 * Print list item
  30 */
  31static void print_item(WINDOW * win, const char *item, int status, int choice,
  32                       int selected)
  33{
  34        int i;
  35
  36        /* Clear 'residue' of last item */
  37        wattrset(win, menubox_attr);
  38        wmove(win, choice, 0);
  39        for (i = 0; i < list_width; i++)
  40                waddch(win, ' ');
  41
  42        wmove(win, choice, check_x);
  43        wattrset(win, selected ? check_selected_attr : check_attr);
  44        wprintw(win, "(%c)", status ? 'X' : ' ');
  45
  46        wattrset(win, selected ? tag_selected_attr : tag_attr);
  47        mvwaddch(win, choice, item_x, item[0]);
  48        wattrset(win, selected ? item_selected_attr : item_attr);
  49        waddstr(win, (char *)item + 1);
  50        if (selected) {
  51                wmove(win, choice, check_x + 1);
  52                wrefresh(win);
  53        }
  54}
  55
  56/*
  57 * Print the scroll indicators.
  58 */
  59static 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, uarrow_attr);
  66                waddch(win, ACS_UARROW);
  67                waddstr(win, "(-)");
  68        } else {
  69                wattrset(win, menubox_attr);
  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, darrow_attr);
  81                waddch(win, ACS_DARROW);
  82                waddstr(win, "(+)");
  83        } else {
  84                wattrset(win, menubox_border_attr);
  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 */
  95static 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 */
 111int dialog_checklist(const char *title, const char *prompt, int height,
 112                     int width, int list_height, int item_no,
 113                     const char *const *items)
 114{
 115        int i, x, y, box_x, box_y;
 116        int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
 117        WINDOW *dialog, *list;
 118
 119        /* Allocate space for storing item on/off status */
 120        if ((status = malloc(sizeof(int) * item_no)) == NULL) {
 121                endwin();
 122                fprintf(stderr,
 123                        "\nCan't allocate memory in dialog_checklist().\n");
 124                exit(-1);
 125        }
 126
 127        /* Initializes status */
 128        for (i = 0; i < item_no; i++) {
 129                status[i] = !strcasecmp(items[i * 3 + 2], "on");
 130                if ((!choice && status[i])
 131                    || !strcasecmp(items[i * 3 + 2], "selected"))
 132                        choice = i + 1;
 133        }
 134        if (choice)
 135                choice--;
 136
 137        max_choice = MIN(list_height, item_no);
 138
 139        /* center dialog box on screen */
 140        x = (COLS - width) / 2;
 141        y = (LINES - height) / 2;
 142
 143        draw_shadow(stdscr, y, x, height, width);
 144
 145        dialog = newwin(height, width, y, x);
 146        keypad(dialog, TRUE);
 147
 148        draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
 149        wattrset(dialog, border_attr);
 150        mvwaddch(dialog, height - 3, 0, ACS_LTEE);
 151        for (i = 0; i < width - 2; i++)
 152                waddch(dialog, ACS_HLINE);
 153        wattrset(dialog, dialog_attr);
 154        waddch(dialog, ACS_RTEE);
 155
 156        print_title(dialog, title, width);
 157
 158        wattrset(dialog, dialog_attr);
 159        print_autowrap(dialog, prompt, width - 2, 1, 3);
 160
 161        list_width = width - 6;
 162        box_y = height - list_height - 5;
 163        box_x = (width - list_width) / 2 - 1;
 164
 165        /* create new window for the list */
 166        list = subwin(dialog, list_height, list_width, y + box_y + 1,
 167                      x + box_x + 1);
 168
 169        keypad(list, TRUE);
 170
 171        /* draw a box around the list items */
 172        draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
 173                 menubox_border_attr, menubox_attr);
 174
 175        /* Find length of longest item in order to center checklist */
 176        check_x = 0;
 177        for (i = 0; i < item_no; i++)
 178                check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
 179
 180        check_x = (list_width - check_x) / 2;
 181        item_x = check_x + 4;
 182
 183        if (choice >= list_height) {
 184                scroll = choice - list_height + 1;
 185                choice -= scroll;
 186        }
 187
 188        /* Print the list */
 189        for (i = 0; i < max_choice; i++) {
 190                print_item(list, items[(scroll + i) * 3 + 1],
 191                           status[i + scroll], i, i == choice);
 192        }
 193
 194        print_arrows(dialog, choice, item_no, scroll,
 195                     box_y, box_x + check_x + 5, list_height);
 196
 197        print_buttons(dialog, height, width, 0);
 198
 199        wnoutrefresh(dialog);
 200        wnoutrefresh(list);
 201        doupdate();
 202
 203        while (key != ESC) {
 204                key = wgetch(dialog);
 205
 206                for (i = 0; i < max_choice; i++)
 207                        if (toupper(key) ==
 208                            toupper(items[(scroll + i) * 3 + 1][0]))
 209                                break;
 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                                                print_item(list, items[scroll * 3 + 1],
 221                                                           status[scroll], 0, FALSE);
 222                                                scrollok(list, TRUE);
 223                                                wscrl(list, -1);
 224                                                scrollok(list, FALSE);
 225                                        }
 226                                        scroll--;
 227                                        print_item(list, items[scroll * 3 + 1], status[scroll], 0, TRUE);
 228                                        print_arrows(dialog, choice, item_no,
 229                                                     scroll, box_y, box_x + check_x + 5, list_height);
 230
 231                                        wnoutrefresh(dialog);
 232                                        wrefresh(list);
 233
 234                                        continue;       /* wait for another key press */
 235                                } else
 236                                        i = choice - 1;
 237                        } else if (key == KEY_DOWN || key == '+') {
 238                                if (choice == max_choice - 1) {
 239                                        if (scroll + choice >= item_no - 1)
 240                                                continue;
 241                                        /* Scroll list up */
 242                                        if (list_height > 1) {
 243                                                /* De-highlight current last item before scrolling up */
 244                                                print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
 245                                                           status[scroll + max_choice - 1],
 246                                                           max_choice - 1, FALSE);
 247                                                scrollok(list, TRUE);
 248                                                wscrl(list, 1);
 249                                                scrollok(list, FALSE);
 250                                        }
 251                                        scroll++;
 252                                        print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
 253                                                   status[scroll + max_choice - 1], max_choice - 1, TRUE);
 254
 255                                        print_arrows(dialog, choice, item_no,
 256                                                     scroll, box_y, box_x + check_x + 5, list_height);
 257
 258                                        wnoutrefresh(dialog);
 259                                        wrefresh(list);
 260
 261                                        continue;       /* wait for another key press */
 262                                } else
 263                                        i = choice + 1;
 264                        }
 265                        if (i != choice) {
 266                                /* De-highlight current item */
 267                                print_item(list, items[(scroll + choice) * 3 + 1],
 268                                           status[scroll + choice], choice, FALSE);
 269                                /* Highlight new item */
 270                                choice = i;
 271                                print_item(list, items[(scroll + choice) * 3 + 1],
 272                                           status[scroll + choice], choice, TRUE);
 273                                wnoutrefresh(dialog);
 274                                wrefresh(list);
 275                        }
 276                        continue;       /* wait for another key press */
 277                }
 278                switch (key) {
 279                case 'H':
 280                case 'h':
 281                case '?':
 282                        fprintf(stderr, "%s", items[(scroll + choice) * 3]);
 283                        delwin(dialog);
 284                        free(status);
 285                        return 1;
 286                case TAB:
 287                case KEY_LEFT:
 288                case KEY_RIGHT:
 289                        button = ((key == KEY_LEFT ? --button : ++button) < 0)
 290                            ? 1 : (button > 1 ? 0 : button);
 291
 292                        print_buttons(dialog, height, width, button);
 293                        wrefresh(dialog);
 294                        break;
 295                case 'S':
 296                case 's':
 297                case ' ':
 298                case '\n':
 299                        if (!button) {
 300                                if (!status[scroll + choice]) {
 301                                        for (i = 0; i < item_no; i++)
 302                                                status[i] = 0;
 303                                        status[scroll + choice] = 1;
 304                                        for (i = 0; i < max_choice; i++)
 305                                                print_item(list, items[(scroll + i) * 3 + 1],
 306                                                           status[scroll + i], i, i == choice);
 307                                }
 308                                wnoutrefresh(dialog);
 309                                wrefresh(list);
 310
 311                                for (i = 0; i < item_no; i++)
 312                                        if (status[i])
 313                                                fprintf(stderr, "%s", items[i * 3]);
 314                        } else
 315                                fprintf(stderr, "%s", items[(scroll + choice) * 3]);
 316                        delwin(dialog);
 317                        free(status);
 318                        return button;
 319                case 'X':
 320                case 'x':
 321                        key = ESC;
 322                case ESC:
 323                        break;
 324                }
 325
 326                /* Now, update everything... */
 327                doupdate();
 328        }
 329
 330        delwin(dialog);
 331        free(status);
 332        return -1;              /* ESC pressed */
 333}
 334