| 1 | /*
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| 2 | * menubox.c -- implements the menu box
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| 3 | *
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| 4 | * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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| 5 | * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@cfw.com)
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| 6 | *
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| 7 | * This program is free software; you can redistribute it and/or
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| 8 | * modify it under the terms of the GNU General Public License
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| 9 | * as published by the Free Software Foundation; either version 2
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| 10 | * of the License, or (at your option) any later version.
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| 11 | *
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| 12 | * This program is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 20 | */
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| 21 |
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| 22 | /*
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| 23 | * Changes by Clifford Wolf (god@clifford.at)
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| 24 | *
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| 25 | * [ 1998-06-13 ]
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| 26 | *
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| 27 | * *) A bugfix for the Page-Down problem
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| 28 | *
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| 29 | * *) Formerly when I used Page Down and Page Up, the cursor would be set
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| 30 | * to the first position in the menu box. Now lxdialog is a bit
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| 31 | * smarter and works more like other menu systems (just have a look at
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| 32 | * it).
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| 33 | *
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| 34 | * *) Formerly if I selected something my scrolling would be broken because
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| 35 | * lxdialog is re-invoked by the Menuconfig shell script, can't
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| 36 | * remember the last scrolling position, and just sets it so that the
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| 37 | * cursor is at the bottom of the box. Now it writes the temporary file
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| 38 | * lxdialog.scrltmp which contains this information. The file is
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| 39 | * deleted by lxdialog if the user leaves a submenu or enters a new
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| 40 | * one, but it would be nice if Menuconfig could make another "rm -f"
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| 41 | * just to be sure. Just try it out - you will recognise a difference!
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| 42 | *
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| 43 | * [ 1998-06-14 ]
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| 44 | *
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| 45 | * *) Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files
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| 46 | * and menus change their size on the fly.
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| 47 | *
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| 48 | * *) If for some reason the last scrolling position is not saved by
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| 49 | * lxdialog, it sets the scrolling so that the selected item is in the
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| 50 | * middle of the menu box, not at the bottom.
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| 51 | *
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| 52 | * 02 January 1999, Michael Elizabeth Chastain (mec@shout.net)
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| 53 | * Reset 'scroll' to 0 if the value from lxdialog.scrltmp is bogus.
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| 54 | * This fixes a bug in Menuconfig where using ' ' to descend into menus
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| 55 | * would leave mis-synchronized lxdialog.scrltmp files lying around,
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| 56 | * fscanf would read in 'scroll', and eventually that value would get used.
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| 57 | */
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| 58 |
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| 59 | #include "dialog.h"
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| 60 |
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| 61 | static int menu_width, item_x;
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| 62 |
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| 63 | /*
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| 64 | * Print menu item
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| 65 | */
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| 66 | static void
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| 67 | print_item (WINDOW * win, const char *item, int choice, int selected, int hotkey)
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| 68 | {
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| 69 | int j;
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| 70 | char menu_item[menu_width+1];
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| 71 |
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| 72 | strncpy(menu_item, item, menu_width);
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| 73 | menu_item[menu_width] = 0;
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| 74 | j = first_alpha(menu_item, "YyNnMm");
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| 75 |
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| 76 | /* Clear 'residue' of last item */
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| 77 | wattrset (win, menubox_attr);
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| 78 | wmove (win, choice, 0);
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| 79 | #if OLD_NCURSES
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| 80 | {
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| 81 | int i;
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| 82 | for (i = 0; i < menu_width; i++)
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| 83 | waddch (win, ' ');
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| 84 | }
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| 85 | #else
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| 86 | wclrtoeol(win);
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| 87 | #endif
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| 88 | wattrset (win, selected ? item_selected_attr : item_attr);
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| 89 | mvwaddstr (win, choice, item_x, menu_item);
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| 90 | #if 0
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| 91 | if (hotkey) {
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| 92 | wattrset (win, selected ? tag_key_selected_attr : tag_key_attr);
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| 93 | mvwaddch(win, choice, item_x+j, menu_item[j]);
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| 94 | }
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| 95 | #endif
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| 96 | if (selected) {
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| 97 | wmove (win, choice, item_x+1);
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| 98 | wrefresh (win);
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| 99 | }
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| 100 | }
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| 101 |
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| 102 | /*
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| 103 | * Print the scroll indicators.
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| 104 | */
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| 105 | static void
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| 106 | print_arrows (WINDOW * win, int item_no, int scroll,
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| 107 | int y, int x, int height)
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| 108 | {
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| 109 | int cur_y, cur_x;
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| 110 |
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| 111 | getyx(win, cur_y, cur_x);
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| 112 |
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| 113 | wmove(win, y, x);
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| 114 |
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| 115 | if (scroll > 0) {
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| 116 | wattrset (win, uarrow_attr);
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| 117 | waddch (win, ACS_UARROW);
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| 118 | waddstr (win, "(-)");
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| 119 | }
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| 120 | else {
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| 121 | wattrset (win, menubox_attr);
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| 122 | waddch (win, ACS_HLINE);
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| 123 | waddch (win, ACS_HLINE);
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| 124 | waddch (win, ACS_HLINE);
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| 125 | waddch (win, ACS_HLINE);
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| 126 | }
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| 127 |
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| 128 | y = y + height + 1;
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| 129 | wmove(win, y, x);
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| 130 |
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| 131 | if ((height < item_no) && (scroll + height < item_no)) {
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| 132 | wattrset (win, darrow_attr);
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| 133 | waddch (win, ACS_DARROW);
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| 134 | waddstr (win, "(+)");
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| 135 | }
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| 136 | else {
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| 137 | wattrset (win, menubox_border_attr);
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| 138 | waddch (win, ACS_HLINE);
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| 139 | waddch (win, ACS_HLINE);
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| 140 | waddch (win, ACS_HLINE);
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| 141 | waddch (win, ACS_HLINE);
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| 142 | }
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| 143 |
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| 144 | wmove(win, cur_y, cur_x);
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| 145 | }
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| 146 |
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| 147 | /*
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| 148 | * Display the termination buttons.
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| 149 | */
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| 150 | static void
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| 151 | print_buttons (WINDOW *win, int height, int width, int selected)
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| 152 | {
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| 153 | int x = width / 2 - 16;
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| 154 | int y = height - 2;
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| 155 |
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| 156 | print_button (win, "Select", y, x, selected == 0);
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| 157 | print_button (win, " Exit ", y, x + 12, selected == 1);
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| 158 | print_button (win, " Help ", y, x + 24, selected == 2);
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| 159 |
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| 160 | wmove(win, y, x+1+12*selected);
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| 161 | wrefresh (win);
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| 162 | }
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| 163 |
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| 164 | /*
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| 165 | * Display a menu for choosing among a number of options
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| 166 | */
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| 167 | int
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| 168 | dialog_menu (const char *title, const char *prompt, int height, int width,
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| 169 | int menu_height, const char *current, int item_no,
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| 170 | struct dialog_list_item ** items)
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| 171 | {
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| 172 | int i, j, x, y, box_x, box_y;
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| 173 | int key = 0, button = 0, scroll = 0, choice = 0, first_item = 0, max_choice;
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| 174 | WINDOW *dialog, *menu;
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| 175 | FILE *f;
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| 176 |
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| 177 | max_choice = MIN (menu_height, item_no);
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| 178 |
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| 179 | /* center dialog box on screen */
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| 180 | x = (COLS - width) / 2;
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| 181 | y = (LINES - height) / 2;
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| 182 |
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| 183 | draw_shadow (stdscr, y, x, height, width);
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| 184 |
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| 185 | dialog = newwin (height, width, y, x);
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| 186 | keypad (dialog, TRUE);
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| 187 |
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| 188 | draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
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| 189 | wattrset (dialog, border_attr);
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| 190 | mvwaddch (dialog, height - 3, 0, ACS_LTEE);
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| 191 | for (i = 0; i < width - 2; i++)
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| 192 | waddch (dialog, ACS_HLINE);
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| 193 | wattrset (dialog, dialog_attr);
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| 194 | wbkgdset (dialog, dialog_attr & A_COLOR);
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| 195 | waddch (dialog, ACS_RTEE);
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| 196 |
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| 197 | if (title != NULL && strlen(title) >= width-2 ) {
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| 198 | /* truncate long title -- mec */
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| 199 | char * title2 = malloc(width-2+1);
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| 200 | memcpy( title2, title, width-2 );
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| 201 | title2[width-2] = '\0';
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| 202 | title = title2;
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| 203 | }
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| 204 |
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| 205 | if (title != NULL) {
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| 206 | wattrset (dialog, title_attr);
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| 207 | mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
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| 208 | waddstr (dialog, (char *)title);
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| 209 | waddch (dialog, ' ');
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| 210 | }
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| 211 |
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| 212 | wattrset (dialog, dialog_attr);
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| 213 | print_autowrap (dialog, prompt, width - 2, 1, 3);
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| 214 |
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| 215 | menu_width = width - 6;
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| 216 | box_y = height - menu_height - 5;
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| 217 | box_x = (width - menu_width) / 2 - 1;
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| 218 |
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| 219 | /* create new window for the menu */
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| 220 | menu = subwin (dialog, menu_height, menu_width,
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| 221 | y + box_y + 1, x + box_x + 1);
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| 222 | keypad (menu, TRUE);
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| 223 |
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| 224 | /* draw a box around the menu items */
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| 225 | draw_box (dialog, box_y, box_x, menu_height + 2, menu_width + 2,
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| 226 | menubox_border_attr, menubox_attr);
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| 227 |
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| 228 | /*
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| 229 | * Find length of longest item in order to center menu.
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| 230 | * Set 'choice' to default item.
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| 231 | */
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| 232 | item_x = 0;
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| 233 | for (i = 0; i < item_no; i++) {
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| 234 | item_x = MAX (item_x, MIN(menu_width, strlen (items[i]->name) + 2));
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| 235 | if (strcmp(current, items[i]->tag) == 0) choice = i;
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| 236 | }
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| 237 |
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| 238 | item_x = (menu_width - item_x) / 2;
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| 239 |
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| 240 | /* get the scroll info from the temp file */
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| 241 | if ( (f=fopen("lxdialog.scrltmp","r")) != NULL ) {
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| 242 | if ( (fscanf(f,"%d\n",&scroll) == 1) && (scroll <= choice) &&
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| 243 | (scroll+max_choice > choice) && (scroll >= 0) &&
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| 244 | (scroll+max_choice <= item_no) ) {
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| 245 | first_item = scroll;
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| 246 | choice = choice - scroll;
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| 247 | fclose(f);
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| 248 | } else {
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| 249 | scroll=0;
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| 250 | remove("lxdialog.scrltmp");
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| 251 | fclose(f);
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| 252 | f=NULL;
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| 253 | }
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| 254 | }
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| 255 | if ( (choice >= max_choice) || (f==NULL && choice >= max_choice/2) ) {
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| 256 | if (choice >= item_no-max_choice/2)
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| 257 | scroll = first_item = item_no-max_choice;
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| 258 | else
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| 259 | scroll = first_item = choice - max_choice/2;
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| 260 | choice = choice - scroll;
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| 261 | }
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| 262 |
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| 263 | /* Print the menu */
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| 264 | for (i=0; i < max_choice; i++) {
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| 265 | print_item (menu, items[first_item + i]->name, i, i == choice,
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| 266 | (items[first_item + i]->tag[0] != ':'));
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| 267 | }
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| 268 |
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| 269 | wnoutrefresh (menu);
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| 270 |
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| 271 | print_arrows(dialog, item_no, scroll,
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| 272 | box_y, box_x+item_x+1, menu_height);
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| 273 |
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| 274 | print_buttons (dialog, height, width, 0);
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| 275 | wmove (menu, choice, item_x+1);
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| 276 | wrefresh (menu);
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| 277 |
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| 278 | while (key != ESC) {
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| 279 | key = wgetch(menu);
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| 280 |
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| 281 | if (key < 256 && isalpha(key)) key = tolower(key);
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| 282 |
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| 283 | if (strchr("ynm", key))
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| 284 | i = max_choice;
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| 285 | else {
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| 286 | for (i = choice+1; i < max_choice; i++) {
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| 287 | j = first_alpha(items[scroll + i]->name, "YyNnMm>");
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| 288 | if (key == tolower(items[scroll + i]->name[j]))
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| 289 | break;
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| 290 | }
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| 291 | if (i == max_choice)
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| 292 | for (i = 0; i < max_choice; i++) {
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| 293 | j = first_alpha(items[scroll + i]->name, "YyNnMm>");
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| 294 | if (key == tolower(items[scroll + i]->name[j]))
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| 295 | break;
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| 296 | }
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| 297 | }
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| 298 |
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| 299 | if (i < max_choice ||
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| 300 | key == KEY_UP || key == KEY_DOWN ||
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| 301 | key == '-' || key == '+' ||
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| 302 | key == KEY_PPAGE || key == KEY_NPAGE) {
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| 303 |
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| 304 | print_item (menu, items[scroll + choice]->name, choice, FALSE,
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| 305 | (items[scroll + choice]->tag[0] != ':'));
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| 306 |
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| 307 | if (key == KEY_UP || key == '-') {
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| 308 | if (choice < 2 && scroll) {
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| 309 | /* Scroll menu down */
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| 310 | scrollok (menu, TRUE);
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| 311 | wscrl (menu, -1);
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| 312 | scrollok (menu, FALSE);
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| 313 |
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| 314 | scroll--;
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| 315 |
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| 316 | print_item (menu, items[scroll]->name, 0, FALSE,
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| 317 | (items[scroll]->tag[0] != ':'));
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| 318 | } else
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| 319 | choice = MAX(choice - 1, 0);
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| 320 |
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| 321 | } else if (key == KEY_DOWN || key == '+') {
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| 322 |
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| 323 | print_item (menu, items[scroll + choice]->name, choice, FALSE,
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| 324 | (items[scroll + choice]->tag[0] != ':'));
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| 325 |
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| 326 | if ((choice > max_choice-3) &&
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| 327 | (scroll + max_choice < item_no)
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| 328 | ) {
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| 329 | /* Scroll menu up */
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| 330 | scrollok (menu, TRUE);
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| 331 | scroll (menu);
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| 332 | scrollok (menu, FALSE);
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| 333 |
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| 334 | scroll++;
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| 335 |
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| 336 | print_item (menu, items[scroll + max_choice - 1]->name,
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| 337 | max_choice-1, FALSE,
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| 338 | (items[scroll + max_choice - 1]->tag[0] != ':'));
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| 339 | } else
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| 340 | choice = MIN(choice+1, max_choice-1);
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| 341 |
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| 342 | } else if (key == KEY_PPAGE) {
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| 343 | scrollok (menu, TRUE);
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| 344 | for (i=0; (i < max_choice); i++) {
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| 345 | if (scroll > 0) {
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| 346 | wscrl (menu, -1);
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| 347 | scroll--;
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| 348 | print_item (menu, items[scroll]->name, 0, FALSE,
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| 349 | (items[scroll]->tag[0] != ':'));
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| 350 | } else {
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| 351 | if (choice > 0)
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| 352 | choice--;
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| 353 | }
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| 354 | }
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| 355 | scrollok (menu, FALSE);
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| 356 |
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| 357 | } else if (key == KEY_NPAGE) {
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| 358 | for (i=0; (i < max_choice); i++) {
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| 359 | if (scroll+max_choice < item_no) {
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| 360 | scrollok (menu, TRUE);
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| 361 | scroll(menu);
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| 362 | scrollok (menu, FALSE);
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| 363 | scroll++;
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| 364 | print_item (menu, items[scroll + max_choice - 1]->name,
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| 365 | max_choice-1, FALSE,
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| 366 | (items[scroll + max_choice - 1]->tag[0] != ':'));
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| 367 | } else {
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| 368 | if (choice+1 < max_choice)
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| 369 | choice++;
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| 370 | }
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| 371 | }
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| 372 |
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| 373 | } else
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| 374 | choice = i;
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| 375 |
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| 376 | print_item (menu, items[scroll + choice]->name, choice, TRUE,
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| 377 | (items[scroll + choice]->tag[0] != ':'));
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| 378 |
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| 379 | print_arrows(dialog, item_no, scroll,
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| 380 | box_y, box_x+item_x+1, menu_height);
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| 381 |
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| 382 | wnoutrefresh (dialog);
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| 383 | wrefresh (menu);
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| 384 |
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| 385 | continue; /* wait for another key press */
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| 386 | }
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| 387 |
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| 388 | switch (key) {
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| 389 | case KEY_LEFT:
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| 390 | case TAB:
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| 391 | case KEY_RIGHT:
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| 392 | button = ((key == KEY_LEFT ? --button : ++button) < 0)
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| 393 | ? 2 : (button > 2 ? 0 : button);
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| 394 |
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| 395 | print_buttons(dialog, height, width, button);
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| 396 | wrefresh (menu);
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| 397 | break;
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| 398 | case ' ':
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| 399 | case 's':
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| 400 | case 'y':
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| 401 | case 'n':
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| 402 | case 'm':
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| 403 | /* save scroll info */
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| 404 | if ( (f=fopen("lxdialog.scrltmp","w")) != NULL ) {
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| 405 | fprintf(f,"%d\n",scroll);
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| 406 | fclose(f);
|
|---|
| 407 | }
|
|---|
| 408 | delwin (dialog);
|
|---|
| 409 | items[scroll + choice]->selected = 1;
|
|---|
| 410 | switch (key) {
|
|---|
| 411 | case 's': return 3;
|
|---|
| 412 | case 'y': return 3;
|
|---|
| 413 | case 'n': return 4;
|
|---|
| 414 | case 'm': return 5;
|
|---|
| 415 | case ' ': return 6;
|
|---|
| 416 | }
|
|---|
| 417 | return 0;
|
|---|
| 418 | case 'h':
|
|---|
| 419 | case '?':
|
|---|
| 420 | button = 2;
|
|---|
| 421 | case '\n':
|
|---|
| 422 | delwin (dialog);
|
|---|
| 423 | items[scroll + choice]->selected = 1;
|
|---|
| 424 |
|
|---|
| 425 | remove("lxdialog.scrltmp");
|
|---|
| 426 | return button;
|
|---|
| 427 | case 'e':
|
|---|
| 428 | case 'x':
|
|---|
| 429 | key = ESC;
|
|---|
| 430 | case ESC:
|
|---|
| 431 | break;
|
|---|
| 432 | }
|
|---|
| 433 | }
|
|---|
| 434 |
|
|---|
| 435 | delwin (dialog);
|
|---|
| 436 | remove("lxdialog.scrltmp");
|
|---|
| 437 | return -1; /* ESC pressed */
|
|---|
| 438 | }
|
|---|
