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438 lines
12 KiB
438 lines
12 KiB
/* |
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* menubox.c -- implements the menu box |
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* |
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* ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk) |
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* MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@cfw.com) |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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/* |
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* Changes by Clifford Wolf (god@clifford.at) |
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* |
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* [ 1998-06-13 ] |
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* |
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* *) A bugfix for the Page-Down problem |
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* |
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* *) Formerly when I used Page Down and Page Up, the cursor would be set |
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* to the first position in the menu box. Now lxdialog is a bit |
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* smarter and works more like other menu systems (just have a look at |
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* it). |
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* |
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* *) Formerly if I selected something my scrolling would be broken because |
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* lxdialog is re-invoked by the Menuconfig shell script, can't |
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* remember the last scrolling position, and just sets it so that the |
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* cursor is at the bottom of the box. Now it writes the temporary file |
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* lxdialog.scrltmp which contains this information. The file is |
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* deleted by lxdialog if the user leaves a submenu or enters a new |
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* one, but it would be nice if Menuconfig could make another "rm -f" |
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* just to be sure. Just try it out - you will recognise a difference! |
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* |
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* [ 1998-06-14 ] |
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* |
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* *) Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files |
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* and menus change their size on the fly. |
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* |
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* *) If for some reason the last scrolling position is not saved by |
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* lxdialog, it sets the scrolling so that the selected item is in the |
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* middle of the menu box, not at the bottom. |
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* |
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* 02 January 1999, Michael Elizabeth Chastain (mec@shout.net) |
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* Reset 'scroll' to 0 if the value from lxdialog.scrltmp is bogus. |
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* This fixes a bug in Menuconfig where using ' ' to descend into menus |
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* would leave mis-synchronized lxdialog.scrltmp files lying around, |
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* fscanf would read in 'scroll', and eventually that value would get used. |
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*/ |
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#include "dialog.h" |
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static int menu_width, item_x; |
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/* |
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* Print menu item |
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*/ |
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static void |
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print_item (WINDOW * win, const char *item, int choice, int selected, int hotkey) |
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{ |
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int j; |
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char menu_item[menu_width+1]; |
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strncpy(menu_item, item, menu_width); |
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menu_item[menu_width] = 0; |
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j = first_alpha(menu_item, "YyNnMmHh"); |
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/* Clear 'residue' of last item */ |
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wattrset (win, menubox_attr); |
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wmove (win, choice, 0); |
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#if OLD_NCURSES |
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{ |
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int i; |
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for (i = 0; i < menu_width; i++) |
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waddch (win, ' '); |
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} |
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#else |
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wclrtoeol(win); |
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#endif |
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wattrset (win, selected ? item_selected_attr : item_attr); |
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mvwaddstr (win, choice, item_x, menu_item); |
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if (hotkey) { |
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wattrset (win, selected ? tag_key_selected_attr : tag_key_attr); |
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mvwaddch(win, choice, item_x+j, menu_item[j]); |
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} |
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if (selected) { |
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wmove (win, choice, item_x+1); |
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wrefresh (win); |
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} |
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} |
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/* |
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* Print the scroll indicators. |
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*/ |
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static void |
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print_arrows (WINDOW * win, int item_no, int scroll, |
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int y, int x, int height) |
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{ |
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int cur_y, cur_x; |
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getyx(win, cur_y, cur_x); |
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wmove(win, y, x); |
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if (scroll > 0) { |
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wattrset (win, uarrow_attr); |
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waddch (win, ACS_UARROW); |
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waddstr (win, "(-)"); |
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} |
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else { |
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wattrset (win, menubox_attr); |
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waddch (win, ACS_HLINE); |
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waddch (win, ACS_HLINE); |
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waddch (win, ACS_HLINE); |
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waddch (win, ACS_HLINE); |
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} |
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y = y + height + 1; |
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wmove(win, y, x); |
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if ((height < item_no) && (scroll + height < item_no)) { |
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wattrset (win, darrow_attr); |
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waddch (win, ACS_DARROW); |
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waddstr (win, "(+)"); |
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} |
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else { |
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wattrset (win, menubox_border_attr); |
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waddch (win, ACS_HLINE); |
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waddch (win, ACS_HLINE); |
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waddch (win, ACS_HLINE); |
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waddch (win, ACS_HLINE); |
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} |
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wmove(win, cur_y, cur_x); |
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} |
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/* |
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* Display the termination buttons. |
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*/ |
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static void |
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print_buttons (WINDOW *win, int height, int width, int selected) |
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{ |
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int x = width / 2 - 16; |
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int y = height - 2; |
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print_button (win, "Select", y, x, selected == 0); |
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print_button (win, " Exit ", y, x + 12, selected == 1); |
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print_button (win, " Help ", y, x + 24, selected == 2); |
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wmove(win, y, x+1+12*selected); |
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wrefresh (win); |
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} |
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/* |
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* Display a menu for choosing among a number of options |
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*/ |
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int |
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dialog_menu (const char *title, const char *prompt, int height, int width, |
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int menu_height, const char *current, int item_no, |
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struct dialog_list_item ** items) |
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{ |
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int i, j, x, y, box_x, box_y; |
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int key = 0, button = 0, scroll = 0, choice = 0, first_item = 0, max_choice; |
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WINDOW *dialog, *menu; |
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FILE *f; |
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max_choice = MIN (menu_height, item_no); |
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/* center dialog box on screen */ |
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x = (COLS - width) / 2; |
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y = (LINES - height) / 2; |
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draw_shadow (stdscr, y, x, height, width); |
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dialog = newwin (height, width, y, x); |
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keypad (dialog, TRUE); |
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draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr); |
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wattrset (dialog, border_attr); |
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mvwaddch (dialog, height - 3, 0, ACS_LTEE); |
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for (i = 0; i < width - 2; i++) |
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waddch (dialog, ACS_HLINE); |
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wattrset (dialog, dialog_attr); |
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wbkgdset (dialog, dialog_attr & A_COLOR); |
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waddch (dialog, ACS_RTEE); |
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if (title != NULL && strlen(title) >= width-2 ) { |
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/* truncate long title -- mec */ |
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char * title2 = malloc(width-2+1); |
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memcpy( title2, title, width-2 ); |
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title2[width-2] = '\0'; |
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title = title2; |
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} |
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if (title != NULL) { |
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wattrset (dialog, title_attr); |
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mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' '); |
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waddstr (dialog, (char *)title); |
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waddch (dialog, ' '); |
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} |
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wattrset (dialog, dialog_attr); |
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print_autowrap (dialog, prompt, width - 2, 1, 3); |
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menu_width = width - 6; |
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box_y = height - menu_height - 5; |
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box_x = (width - menu_width) / 2 - 1; |
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/* create new window for the menu */ |
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menu = subwin (dialog, menu_height, menu_width, |
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y + box_y + 1, x + box_x + 1); |
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keypad (menu, TRUE); |
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/* draw a box around the menu items */ |
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draw_box (dialog, box_y, box_x, menu_height + 2, menu_width + 2, |
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menubox_border_attr, menubox_attr); |
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/* |
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* Find length of longest item in order to center menu. |
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* Set 'choice' to default item. |
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*/ |
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item_x = 0; |
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for (i = 0; i < item_no; i++) { |
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item_x = MAX (item_x, MIN(menu_width, strlen (items[i]->name) + 2)); |
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if (strcmp(current, items[i]->tag) == 0) choice = i; |
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} |
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item_x = (menu_width - item_x) / 2; |
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/* get the scroll info from the temp file */ |
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if ( (f=fopen("lxdialog.scrltmp","r")) != NULL ) { |
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if ( (fscanf(f,"%d\n",&scroll) == 1) && (scroll <= choice) && |
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(scroll+max_choice > choice) && (scroll >= 0) && |
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(scroll+max_choice <= item_no) ) { |
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first_item = scroll; |
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choice = choice - scroll; |
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fclose(f); |
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} else { |
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scroll=0; |
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remove("lxdialog.scrltmp"); |
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fclose(f); |
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f=NULL; |
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} |
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} |
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if ( (choice >= max_choice) || (f==NULL && choice >= max_choice/2) ) { |
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if (choice >= item_no-max_choice/2) |
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scroll = first_item = item_no-max_choice; |
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else |
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scroll = first_item = choice - max_choice/2; |
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choice = choice - scroll; |
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} |
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/* Print the menu */ |
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for (i=0; i < max_choice; i++) { |
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print_item (menu, items[first_item + i]->name, i, i == choice, |
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(items[first_item + i]->tag[0] != ':')); |
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} |
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wnoutrefresh (menu); |
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print_arrows(dialog, item_no, scroll, |
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box_y, box_x+item_x+1, menu_height); |
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print_buttons (dialog, height, width, 0); |
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wmove (menu, choice, item_x+1); |
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wrefresh (menu); |
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while (key != ESC) { |
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key = wgetch(menu); |
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if (key < 256 && isalpha(key)) key = tolower(key); |
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if (strchr("ynmh", key)) |
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i = max_choice; |
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else { |
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for (i = choice+1; i < max_choice; i++) { |
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j = first_alpha(items[scroll + i]->name, "YyNnMmHh"); |
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if (key == tolower(items[scroll + i]->name[j])) |
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break; |
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} |
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if (i == max_choice) |
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for (i = 0; i < max_choice; i++) { |
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j = first_alpha(items[scroll + i]->name, "YyNnMmHh"); |
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if (key == tolower(items[scroll + i]->name[j])) |
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break; |
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} |
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} |
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if (i < max_choice || |
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key == KEY_UP || key == KEY_DOWN || |
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key == '-' || key == '+' || |
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key == KEY_PPAGE || key == KEY_NPAGE) { |
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print_item (menu, items[scroll + choice]->name, choice, FALSE, |
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(items[scroll + choice]->tag[0] != ':')); |
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if (key == KEY_UP || key == '-') { |
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if (choice < 2 && scroll) { |
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/* Scroll menu down */ |
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scrollok (menu, TRUE); |
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wscrl (menu, -1); |
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scrollok (menu, FALSE); |
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scroll--; |
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print_item (menu, items[scroll]->name, 0, FALSE, |
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(items[scroll]->tag[0] != ':')); |
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} else |
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choice = MAX(choice - 1, 0); |
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} else if (key == KEY_DOWN || key == '+') { |
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print_item (menu, items[scroll + choice]->name, choice, FALSE, |
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(items[scroll + choice]->tag[0] != ':')); |
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if ((choice > max_choice-3) && |
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(scroll + max_choice < item_no) |
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) { |
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/* Scroll menu up */ |
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scrollok (menu, TRUE); |
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scroll (menu); |
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scrollok (menu, FALSE); |
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scroll++; |
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print_item (menu, items[scroll + max_choice - 1]->name, |
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max_choice-1, FALSE, |
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(items[scroll + max_choice - 1]->tag[0] != ':')); |
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} else |
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choice = MIN(choice+1, max_choice-1); |
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} else if (key == KEY_PPAGE) { |
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scrollok (menu, TRUE); |
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for (i=0; (i < max_choice); i++) { |
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if (scroll > 0) { |
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wscrl (menu, -1); |
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scroll--; |
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print_item (menu, items[scroll]->name, 0, FALSE, |
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(items[scroll]->tag[0] != ':')); |
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} else { |
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if (choice > 0) |
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choice--; |
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} |
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} |
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scrollok (menu, FALSE); |
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} else if (key == KEY_NPAGE) { |
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for (i=0; (i < max_choice); i++) { |
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if (scroll+max_choice < item_no) { |
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scrollok (menu, TRUE); |
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scroll(menu); |
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scrollok (menu, FALSE); |
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scroll++; |
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print_item (menu, items[scroll + max_choice - 1]->name, |
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max_choice-1, FALSE, |
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(items[scroll + max_choice - 1]->tag[0] != ':')); |
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} else { |
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if (choice+1 < max_choice) |
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choice++; |
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} |
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} |
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} else |
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choice = i; |
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print_item (menu, items[scroll + choice]->name, choice, TRUE, |
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(items[scroll + choice]->tag[0] != ':')); |
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print_arrows(dialog, item_no, scroll, |
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box_y, box_x+item_x+1, menu_height); |
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wnoutrefresh (dialog); |
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wrefresh (menu); |
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continue; /* wait for another key press */ |
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} |
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switch (key) { |
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case KEY_LEFT: |
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case TAB: |
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case KEY_RIGHT: |
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button = ((key == KEY_LEFT ? --button : ++button) < 0) |
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? 2 : (button > 2 ? 0 : button); |
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print_buttons(dialog, height, width, button); |
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wrefresh (menu); |
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break; |
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case ' ': |
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case 's': |
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case 'y': |
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case 'n': |
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case 'm': |
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case '/': |
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/* save scroll info */ |
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if ( (f=fopen("lxdialog.scrltmp","w")) != NULL ) { |
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fprintf(f,"%d\n",scroll); |
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fclose(f); |
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} |
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delwin (dialog); |
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items[scroll + choice]->selected = 1; |
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switch (key) { |
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case 's': return 3; |
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case 'y': return 3; |
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case 'n': return 4; |
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case 'm': return 5; |
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case ' ': return 6; |
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case '/': return 7; |
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} |
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return 0; |
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case 'h': |
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case '?': |
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button = 2; |
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case '\n': |
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delwin (dialog); |
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items[scroll + choice]->selected = 1; |
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remove("lxdialog.scrltmp"); |
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return button; |
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case 'e': |
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case 'x': |
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key = ESC; |
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case ESC: |
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break; |
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} |
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} |
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delwin (dialog); |
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remove("lxdialog.scrltmp"); |
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return -1; /* ESC pressed */ |
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}
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