diff options
Diffstat (limited to 'scripts/kconfig/lxdialog/menubox.c')
-rw-r--r-- | scripts/kconfig/lxdialog/menubox.c | 425 |
1 files changed, 425 insertions, 0 deletions
diff --git a/scripts/kconfig/lxdialog/menubox.c b/scripts/kconfig/lxdialog/menubox.c new file mode 100644 index 00000000000..09512b54437 --- /dev/null +++ b/scripts/kconfig/lxdialog/menubox.c @@ -0,0 +1,425 @@ +/* + * 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" + +#define ITEM_IDENT 1 /* Indent of menu entries. Fixed for all menus */ +static int menu_width; + +/* + * Print menu item + */ +static void do_print_item(WINDOW * win, const char *item, int choice, + int selected, int hotkey) +{ + int j; + char *menu_item = malloc(menu_width + 1); + + strncpy(menu_item, item, menu_width - ITEM_IDENT); + 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_IDENT, menu_item); + if (hotkey) { + wattrset(win, selected ? tag_key_selected_attr : tag_key_attr); + mvwaddch(win, choice, ITEM_IDENT + j, menu_item[j]); + } + if (selected) { + wmove(win, choice, ITEM_IDENT + 1); + } + free(menu_item); + wrefresh(win); +} + +#define print_item(index, choice, selected) \ +do {\ + int hotkey = (items[(index) * 2][0] != ':'); \ + do_print_item(menu, items[(index) * 2 + 1], choice, selected, hotkey); \ +} while (0) + +/* + * 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); + wrefresh(win); + + 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); + wrefresh(win); +} + +/* + * 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); +} + +/* scroll up n lines (n may be negative) */ +static void do_scroll(WINDOW *win, int *scroll, int n) +{ + /* Scroll menu up */ + scrollok(win, TRUE); + wscrl(win, n); + scrollok(win, FALSE); + *scroll = *scroll + n; + 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; + int 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); + + print_title(dialog, title, width); + + 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); + + /* Set choice to default item */ + for (i = 0; i < item_no; i++) + if (strcmp(current, items[i * 2]) == 0) + choice = i; + + /* 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(first_item + i, i, i == choice); + } + + wnoutrefresh(menu); + + print_arrows(dialog, item_no, scroll, + box_y, box_x + ITEM_IDENT + 1, menu_height); + + print_buttons(dialog, height, width, 0); + wmove(menu, choice, ITEM_IDENT + 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) { + /* Remove highligt of current item */ + print_item(scroll + choice, choice, FALSE); + + if (key == KEY_UP || key == '-') { + if (choice < 2 && scroll) { + /* Scroll menu down */ + do_scroll(menu, &scroll, -1); + + print_item(scroll, 0, FALSE); + } else + choice = MAX(choice - 1, 0); + + } else if (key == KEY_DOWN || key == '+') { + print_item(scroll+choice, choice, FALSE); + + if ((choice > max_choice - 3) && + (scroll + max_choice < item_no)) { + /* Scroll menu up */ + do_scroll(menu, &scroll, 1); + + print_item(scroll+max_choice - 1, + max_choice - 1, FALSE); + } 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) { + do_scroll(menu, &scroll, -1); + print_item(scroll, 0, FALSE); + } else { + if (choice > 0) + choice--; + } + } + + } else if (key == KEY_NPAGE) { + for (i = 0; (i < max_choice); i++) { + if (scroll + max_choice < item_no) { + do_scroll(menu, &scroll, 1); + print_item(scroll+max_choice-1, + max_choice - 1, FALSE); + } else { + if (choice + 1 < max_choice) + choice++; + } + } + } else + choice = i; + + print_item(scroll + choice, choice, TRUE); + + print_arrows(dialog, item_no, scroll, + box_y, box_x + ITEM_IDENT + 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 */ +} |