LXR linux/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, 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        if (!item_is_tag(':'))
  45                wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
  46
  47        wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
  48        mvwaddch(win, choice, item_x, item_str()[0]);
  49        wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
  50        waddstr(win, (char *)item_str() + 1);
  51        if (selected) {
  52                wmove(win, choice, check_x + 1);
  53                wrefresh(win);
  54        }
  55}
  56
  57/*
  58 * Print the scroll indicators.
  59 */
  60static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
  61             int y, int x, int height)
  62{
  63        wmove(win, y, x);
  64
  65        if (scroll > 0) {
  66                wattrset(win, dlg.uarrow.atr);
  67                waddch(win, ACS_UARROW);
  68                waddstr(win, "(-)");
  69        } else {
  70                wattrset(win, dlg.menubox.atr);
  71                waddch(win, ACS_HLINE);
  72                waddch(win, ACS_HLINE);
  73                waddch(win, ACS_HLINE);
  74                waddch(win, ACS_HLINE);
  75        }
  76
  77        y = y + height + 1;
  78        wmove(win, y, x);
  79
  80        if ((height < item_no) && (scroll + choice < item_no - 1)) {
  81                wattrset(win, dlg.darrow.atr);
  82                waddch(win, ACS_DARROW);
  83                waddstr(win, "(+)");
  84        } else {
  85                wattrset(win, dlg.menubox_border.atr);
  86                waddch(win, ACS_HLINE);
  87                waddch(win, ACS_HLINE);
  88                waddch(win, ACS_HLINE);
  89                waddch(win, ACS_HLINE);
  90        }
  91}
  92
  93/*
  94 *  Display the termination buttons
  95 */
  96static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  97{
  98        int x = width / 2 - 11;
  99        int y = height - 2;
 100
 101        print_button(dialog, gettext("Select"), y, x, selected == 0);
 102        print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
 103
 104        wmove(dialog, y, x + 1 + 14 * selected);
 105        wrefresh(dialog);
 106}
 107
 108/*
 109 * Display a dialog box with a list of options that can be turned on or off
 110 * in the style of radiolist (only one option turned on at a time).
 111 */
 112int dialog_checklist(const char *title, const char *prompt, int height,
 113                     int width, int list_height)
 114{
 115        int i, x, y, box_x, box_y;
 116        int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
 117        WINDOW *dialog, *list;
 118
 119        /* which item to highlight */
 120        item_foreach() {
 121                if (item_is_tag('X'))
 122                        choice = item_n();
 123                if (item_is_selected()) {
 124                        choice = item_n();
 125                        break;
 126                }
 127        }
 128
 129do_resize:
 130        if (getmaxy(stdscr) < (height + 6))
 131                return -ERRDISPLAYTOOSMALL;
 132        if (getmaxx(stdscr) < (width + 6))
 133                return -ERRDISPLAYTOOSMALL;
 134
 135        max_choice = MIN(list_height, item_count());
 136
 137        /* center dialog box on screen */
 138        x = (COLS - width) / 2;
 139        y = (LINES - height) / 2;
 140
 141        draw_shadow(stdscr, y, x, height, width);
 142
 143        dialog = newwin(height, width, y, x);
 144        keypad(dialog, TRUE);
 145
 146        draw_box(dialog, 0, 0, height, width,
 147                 dlg.dialog.atr, dlg.border.atr);
 148        wattrset(dialog, dlg.border.atr);
 149        mvwaddch(dialog, height - 3, 0, ACS_LTEE);
 150        for (i = 0; i < width - 2; i++)
 151                waddch(dialog, ACS_HLINE);
 152        wattrset(dialog, dlg.dialog.atr);
 153        waddch(dialog, ACS_RTEE);
 154
 155        print_title(dialog, title, width);
 156
 157        wattrset(dialog, dlg.dialog.atr);
 158        print_autowrap(dialog, prompt, width - 2, 1, 3);
 159
 160        list_width = width - 6;
 161        box_y = height - list_height - 5;
 162        box_x = (width - list_width) / 2 - 1;
 163
 164        /* create new window for the list */
 165        list = subwin(dialog, list_height, list_width, y + box_y + 1,
 166                      x + box_x + 1);
 167
 168        keypad(list, TRUE);
 169
 170        /* draw a box around the list items */
 171        draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
 172                 dlg.menubox_border.atr, dlg.menubox.atr);
 173
 174        /* Find length of longest item in order to center checklist */
 175        check_x = 0;
 176        item_foreach()
 177                check_x = MAX(check_x, strlen(item_str()) + 4);
 178
 179        check_x = (list_width - check_x) / 2;
 180        item_x = check_x + 4;
 181
 182        if (choice >= list_height) {
 183                scroll = choice - list_height + 1;
 184                choice -= scroll;
 185        }
 186
 187        /* Print the list */
 188        for (i = 0; i < max_choice; i++) {
 189                item_set(scroll + i);
 190                print_item(list, i, i == choice);
 191        }
 192
 193        print_arrows(dialog, choice, item_count(), scroll,
 194                     box_y, box_x + check_x + 5, list_height);
 195
 196        print_buttons(dialog, height, width, 0);
 197
 198        wnoutrefresh(dialog);
 199        wnoutrefresh(list);
 200        doupdate();
 201
 202        while (key != KEY_ESC) {
 203                key = wgetch(dialog);
 204
 205                for (i = 0; i < max_choice; i++) {
 206                        item_set(i + scroll);
 207                        if (toupper(key) == toupper(item_str()[0]))
 208                                break;
 209                }
 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                                                item_set(scroll);
 221                                                print_item(list, 0, FALSE);
 222                                                scrollok(list, TRUE);
 223                                                wscrl(list, -1);
 224                                                scrollok(list, FALSE);
 225                                        }
 226                                        scroll--;
 227                                        item_set(scroll);
 228                                        print_item(list, 0, TRUE);
 229                                        print_arrows(dialog, choice, item_count(),
 230                                                     scroll, box_y, box_x + check_x + 5, list_height);
 231
 232                                        wnoutrefresh(dialog);
 233                                        wrefresh(list);
 234
 235                                        continue;       /* wait for another key press */
 236                                } else
 237                                        i = choice - 1;
 238                        } else if (key == KEY_DOWN || key == '+') {
 239                                if (choice == max_choice - 1) {
 240                                        if (scroll + choice >= item_count() - 1)
 241                                                continue;
 242                                        /* Scroll list up */
 243                                        if (list_height > 1) {
 244                                                /* De-highlight current last item before scrolling up */
 245                                                item_set(scroll + max_choice - 1);
 246                                                print_item(list,
 247                                                            max_choice - 1,
 248                                                            FALSE);
 249                                                scrollok(list, TRUE);
 250                                                wscrl(list, 1);
 251                                                scrollok(list, FALSE);
 252                                        }
 253                                        scroll++;
 254                                        item_set(scroll + max_choice - 1);
 255                                        print_item(list, max_choice - 1, TRUE);
 256
 257                                        print_arrows(dialog, choice, item_count(),
 258                                                     scroll, box_y, box_x + check_x + 5, list_height);
 259
 260                                        wnoutrefresh(dialog);
 261                                        wrefresh(list);
 262
 263                                        continue;       /* wait for another key press */
 264                                } else
 265                                        i = choice + 1;
 266                        }
 267                        if (i != choice) {
 268                                /* De-highlight current item */
 269                                item_set(scroll + choice);
 270                                print_item(list, choice, FALSE);
 271                                /* Highlight new item */
 272                                choice = i;
 273                                item_set(scroll + choice);
 274                                print_item(list, choice, TRUE);
 275                                wnoutrefresh(dialog);
 276                                wrefresh(list);
 277                        }
 278                        continue;       /* wait for another key press */
 279                }
 280                switch (key) {
 281                case 'H':
 282                case 'h':
 283                case '?':
 284                        button = 1;
 285                        /* fall-through */
 286                case 'S':
 287                case 's':
 288                case ' ':
 289                case '\n':
 290                        item_foreach()
 291                                item_set_selected(0);
 292                        item_set(scroll + choice);
 293                        item_set_selected(1);
 294                        delwin(list);
 295                        delwin(dialog);
 296                        return button;
 297                case TAB:
 298                case KEY_LEFT:
 299                case KEY_RIGHT:
 300                        button = ((key == KEY_LEFT ? --button : ++button) < 0)
 301                            ? 1 : (button > 1 ? 0 : button);
 302
 303                        print_buttons(dialog, height, width, button);
 304                        wrefresh(dialog);
 305                        break;
 306                case 'X':
 307                case 'x':
 308                        key = KEY_ESC;
 309                        break;
 310                case KEY_ESC:
 311                        key = on_key_esc(dialog);
 312                        break;
 313                case KEY_RESIZE:
 314                        delwin(list);
 315                        delwin(dialog);
 316                        on_key_resize();
 317                        goto do_resize;
 318                }
 319
 320                /* Now, update everything... */
 321                doupdate();
 322        }
 323        delwin(list);
 324        delwin(dialog);
 325        return key;             /* ESC pressed */
 326}
 327