[1765] | 1 | /*
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| 2 | * checklist.c -- implements the checklist box
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| 3 | *
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| 4 | * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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| 5 | * Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
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| 6 | * Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
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| 7 | * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
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| 8 | *
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| 9 | * This program is free software; you can redistribute it and/or
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| 10 | * modify it under the terms of the GNU General Public License
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| 11 | * as published by the Free Software Foundation; either version 2
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| 12 | * of the License, or (at your option) any later version.
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| 13 | *
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| 14 | * This program is distributed in the hope that it will be useful,
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 17 | * GNU General Public License for more details.
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| 18 | *
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| 19 | * You should have received a copy of the GNU General Public License
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| 20 | * along with this program; if not, write to the Free Software
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| 21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 22 | */
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| 23 |
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| 24 | #include "dialog.h"
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| 25 |
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| 26 | static int list_width, check_x, item_x;
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| 27 |
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| 28 | /*
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| 29 | * Print list item
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| 30 | */
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| 31 | static void print_item(WINDOW * win, const char *item, int status, int choice,
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| 32 | int selected)
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| 33 | {
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| 34 | int i;
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| 35 |
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| 36 | /* Clear 'residue' of last item */
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| 37 | wattrset(win, menubox_attr);
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| 38 | wmove(win, choice, 0);
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| 39 | for (i = 0; i < list_width; i++)
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| 40 | waddch(win, ' ');
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| 41 |
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| 42 | wmove(win, choice, check_x);
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| 43 | wattrset(win, selected ? check_selected_attr : check_attr);
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| 44 | wprintw(win, "(%c)", status ? 'X' : ' ');
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| 45 |
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| 46 | wattrset(win, selected ? tag_selected_attr : tag_attr);
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| 47 | mvwaddch(win, choice, item_x, item[0]);
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| 48 | wattrset(win, selected ? item_selected_attr : item_attr);
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| 49 | waddstr(win, (char *)item + 1);
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| 50 | if (selected) {
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| 51 | wmove(win, choice, check_x + 1);
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| 52 | wrefresh(win);
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| 53 | }
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| 54 | }
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| 55 |
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| 56 | /*
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| 57 | * Print the scroll indicators.
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| 58 | */
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| 59 | static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
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| 60 | int y, int x, int height)
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| 61 | {
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| 62 | wmove(win, y, x);
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| 63 |
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| 64 | if (scroll > 0) {
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| 65 | wattrset(win, uarrow_attr);
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| 66 | waddch(win, ACS_UARROW);
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| 67 | waddstr(win, "(-)");
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| 68 | } else {
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| 69 | wattrset(win, menubox_attr);
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| 70 | waddch(win, ACS_HLINE);
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| 71 | waddch(win, ACS_HLINE);
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| 72 | waddch(win, ACS_HLINE);
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| 73 | waddch(win, ACS_HLINE);
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| 74 | }
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| 75 |
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| 76 | y = y + height + 1;
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| 77 | wmove(win, y, x);
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| 78 |
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| 79 | if ((height < item_no) && (scroll + choice < item_no - 1)) {
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| 80 | wattrset(win, darrow_attr);
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| 81 | waddch(win, ACS_DARROW);
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| 82 | waddstr(win, "(+)");
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| 83 | } else {
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| 84 | wattrset(win, menubox_border_attr);
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| 85 | waddch(win, ACS_HLINE);
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| 86 | waddch(win, ACS_HLINE);
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| 87 | waddch(win, ACS_HLINE);
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| 88 | waddch(win, ACS_HLINE);
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| 89 | }
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| 90 | }
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| 91 |
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| 92 | /*
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| 93 | * Display the termination buttons
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| 94 | */
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| 95 | static void print_buttons(WINDOW * dialog, int height, int width, int selected)
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| 96 | {
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| 97 | int x = width / 2 - 11;
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| 98 | int y = height - 2;
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| 99 |
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| 100 | print_button(dialog, "Select", y, x, selected == 0);
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| 101 | print_button(dialog, " Help ", y, x + 14, selected == 1);
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| 102 |
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| 103 | wmove(dialog, y, x + 1 + 14 * selected);
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| 104 | wrefresh(dialog);
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| 105 | }
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| 106 |
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| 107 | /*
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| 108 | * Display a dialog box with a list of options that can be turned on or off
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| 109 | * in the style of radiolist (only one option turned on at a time).
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| 110 | */
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| 111 | int dialog_checklist(const char *title, const char *prompt, int height,
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| 112 | int width, int list_height, int item_no,
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| 113 | const char *const *items)
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| 114 | {
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| 115 | int i, x, y, box_x, box_y;
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| 116 | int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
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| 117 | WINDOW *dialog, *list;
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| 118 |
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| 119 | /* Allocate space for storing item on/off status */
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| 120 | if ((status = malloc(sizeof(int) * item_no)) == NULL) {
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| 121 | endwin();
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| 122 | fprintf(stderr,
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| 123 | "\nCan't allocate memory in dialog_checklist().\n");
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| 124 | exit(-1);
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| 125 | }
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| 126 |
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| 127 | /* Initializes status */
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| 128 | for (i = 0; i < item_no; i++) {
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| 129 | status[i] = !strcasecmp(items[i * 3 + 2], "on");
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| 130 | if ((!choice && status[i])
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| 131 | || !strcasecmp(items[i * 3 + 2], "selected"))
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| 132 | choice = i + 1;
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| 133 | }
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| 134 | if (choice)
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| 135 | choice--;
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| 136 |
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| 137 | max_choice = MIN(list_height, item_no);
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| 138 |
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| 139 | /* center dialog box on screen */
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| 140 | x = (COLS - width) / 2;
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| 141 | y = (LINES - height) / 2;
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| 142 |
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| 143 | draw_shadow(stdscr, y, x, height, width);
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| 144 |
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| 145 | dialog = newwin(height, width, y, x);
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| 146 | keypad(dialog, TRUE);
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| 147 |
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| 148 | draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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| 149 | wattrset(dialog, border_attr);
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| 150 | mvwaddch(dialog, height - 3, 0, ACS_LTEE);
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| 151 | for (i = 0; i < width - 2; i++)
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| 152 | waddch(dialog, ACS_HLINE);
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| 153 | wattrset(dialog, dialog_attr);
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| 154 | waddch(dialog, ACS_RTEE);
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| 155 |
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| 156 | print_title(dialog, title, width);
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| 157 |
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| 158 | wattrset(dialog, dialog_attr);
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| 159 | print_autowrap(dialog, prompt, width - 2, 1, 3);
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| 160 |
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| 161 | list_width = width - 6;
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| 162 | box_y = height - list_height - 5;
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| 163 | box_x = (width - list_width) / 2 - 1;
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| 164 |
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| 165 | /* create new window for the list */
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| 166 | list = subwin(dialog, list_height, list_width, y + box_y + 1,
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| 167 | x + box_x + 1);
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| 168 |
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| 169 | keypad(list, TRUE);
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| 170 |
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| 171 | /* draw a box around the list items */
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| 172 | draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
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| 173 | menubox_border_attr, menubox_attr);
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| 174 |
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| 175 | /* Find length of longest item in order to center checklist */
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| 176 | check_x = 0;
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| 177 | for (i = 0; i < item_no; i++)
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| 178 | check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
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| 179 |
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| 180 | check_x = (list_width - check_x) / 2;
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| 181 | item_x = check_x + 4;
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| 182 |
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| 183 | if (choice >= list_height) {
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| 184 | scroll = choice - list_height + 1;
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| 185 | choice -= scroll;
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| 186 | }
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| 187 |
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| 188 | /* Print the list */
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| 189 | for (i = 0; i < max_choice; i++) {
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| 190 | print_item(list, items[(scroll + i) * 3 + 1],
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| 191 | status[i + scroll], i, i == choice);
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| 192 | }
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| 193 |
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| 194 | print_arrows(dialog, choice, item_no, scroll,
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| 195 | box_y, box_x + check_x + 5, list_height);
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| 196 |
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| 197 | print_buttons(dialog, height, width, 0);
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| 198 |
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| 199 | wnoutrefresh(dialog);
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| 200 | wnoutrefresh(list);
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| 201 | doupdate();
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| 202 |
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| 203 | while (key != ESC) {
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| 204 | key = wgetch(dialog);
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| 205 |
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| 206 | for (i = 0; i < max_choice; i++)
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| 207 | if (toupper(key) ==
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| 208 | toupper(items[(scroll + i) * 3 + 1][0]))
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| 209 | break;
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| 210 |
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| 211 | if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
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| 212 | key == '+' || key == '-') {
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| 213 | if (key == KEY_UP || key == '-') {
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| 214 | if (!choice) {
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| 215 | if (!scroll)
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| 216 | continue;
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| 217 | /* Scroll list down */
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| 218 | if (list_height > 1) {
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| 219 | /* De-highlight current first item */
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| 220 | print_item(list, items[scroll * 3 + 1],
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| 221 | status[scroll], 0, FALSE);
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| 222 | scrollok(list, TRUE);
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| 223 | wscrl(list, -1);
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| 224 | scrollok(list, FALSE);
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| 225 | }
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| 226 | scroll--;
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| 227 | print_item(list, items[scroll * 3 + 1], status[scroll], 0, TRUE);
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| 228 | print_arrows(dialog, choice, item_no,
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| 229 | scroll, box_y, box_x + check_x + 5, list_height);
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| 230 |
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| 231 | wnoutrefresh(dialog);
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| 232 | wrefresh(list);
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| 233 |
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| 234 | continue; /* wait for another key press */
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| 235 | } else
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| 236 | i = choice - 1;
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| 237 | } else if (key == KEY_DOWN || key == '+') {
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| 238 | if (choice == max_choice - 1) {
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| 239 | if (scroll + choice >= item_no - 1)
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| 240 | continue;
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| 241 | /* Scroll list up */
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| 242 | if (list_height > 1) {
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| 243 | /* De-highlight current last item before scrolling up */
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| 244 | print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
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| 245 | status[scroll + max_choice - 1],
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| 246 | max_choice - 1, FALSE);
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| 247 | scrollok(list, TRUE);
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| 248 | wscrl(list, 1);
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| 249 | scrollok(list, FALSE);
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| 250 | }
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| 251 | scroll++;
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| 252 | print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
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| 253 | status[scroll + max_choice - 1], max_choice - 1, TRUE);
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| 254 |
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| 255 | print_arrows(dialog, choice, item_no,
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| 256 | scroll, box_y, box_x + check_x + 5, list_height);
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| 257 |
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| 258 | wnoutrefresh(dialog);
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| 259 | wrefresh(list);
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| 260 |
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| 261 | continue; /* wait for another key press */
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| 262 | } else
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| 263 | i = choice + 1;
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| 264 | }
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| 265 | if (i != choice) {
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| 266 | /* De-highlight current item */
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| 267 | print_item(list, items[(scroll + choice) * 3 + 1],
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| 268 | status[scroll + choice], choice, FALSE);
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| 269 | /* Highlight new item */
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| 270 | choice = i;
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| 271 | print_item(list, items[(scroll + choice) * 3 + 1],
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| 272 | status[scroll + choice], choice, TRUE);
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| 273 | wnoutrefresh(dialog);
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| 274 | wrefresh(list);
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| 275 | }
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| 276 | continue; /* wait for another key press */
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| 277 | }
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| 278 | switch (key) {
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| 279 | case 'H':
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| 280 | case 'h':
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| 281 | case '?':
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| 282 | fprintf(stderr, "%s", items[(scroll + choice) * 3]);
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| 283 | delwin(dialog);
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| 284 | free(status);
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| 285 | return 1;
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| 286 | case TAB:
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| 287 | case KEY_LEFT:
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| 288 | case KEY_RIGHT:
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| 289 | button = ((key == KEY_LEFT ? --button : ++button) < 0)
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| 290 | ? 1 : (button > 1 ? 0 : button);
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| 291 |
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| 292 | print_buttons(dialog, height, width, button);
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| 293 | wrefresh(dialog);
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| 294 | break;
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| 295 | case 'S':
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| 296 | case 's':
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| 297 | case ' ':
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| 298 | case '\n':
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| 299 | if (!button) {
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| 300 | if (!status[scroll + choice]) {
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| 301 | for (i = 0; i < item_no; i++)
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| 302 | status[i] = 0;
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| 303 | status[scroll + choice] = 1;
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| 304 | for (i = 0; i < max_choice; i++)
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| 305 | print_item(list, items[(scroll + i) * 3 + 1],
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| 306 | status[scroll + i], i, i == choice);
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| 307 | }
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| 308 | wnoutrefresh(dialog);
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| 309 | wrefresh(list);
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| 310 |
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| 311 | for (i = 0; i < item_no; i++)
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| 312 | if (status[i])
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| 313 | fprintf(stderr, "%s", items[i * 3]);
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| 314 | } else
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| 315 | fprintf(stderr, "%s", items[(scroll + choice) * 3]);
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| 316 | delwin(dialog);
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| 317 | free(status);
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| 318 | return button;
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| 319 | case 'X':
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| 320 | case 'x':
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| 321 | key = ESC;
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| 322 | case ESC:
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| 323 | break;
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| 324 | }
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| 325 |
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| 326 | /* Now, update everything... */
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| 327 | doupdate();
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| 328 | }
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| 329 |
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| 330 | delwin(dialog);
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| 331 | free(status);
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| 332 | return -1; /* ESC pressed */
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| 333 | }
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