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