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/*
 *  yesno.c -- implements the yes/no box
 *
 *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
 *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@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.
 */

#include "dialog.h"

/*
 * Display termination buttons
 */
static void print_buttons(WINDOW * dialog, int height, int width, int selected)
{
        int x = width / 2 - 10;
        int y = height - 2;

        print_button(dialog, gettext(" Yes "), y, x, selected == 0);
        print_button(dialog, gettext("  No  "), y, x + 13, selected == 1);

        wmove(dialog, y, x + 1 + 13 * selected);
        wrefresh(dialog);
}

/*
 * Display a dialog box with two buttons - Yes and No
 */
int dialog_yesno(const char *title, const char *prompt, int height, int width)
{
        int i, x, y, key = 0, button = 0;
        WINDOW *dialog;

do_resize:
        if (getmaxy(stdscr) < (height + YESNO_HEIGTH_MIN))
                return -ERRDISPLAYTOOSMALL;
        if (getmaxx(stdscr) < (width + YESNO_WIDTH_MIN))
                return -ERRDISPLAYTOOSMALL;

        /* center dialog box on screen */
        x = (getmaxx(stdscr) - width) / 2;
        y = (getmaxy(stdscr) - 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,
                 dlg.dialog.atr, dlg.border.atr);
        wattrset(dialog, dlg.border.atr);
        mvwaddch(dialog, height - 3, 0, ACS_LTEE);
        for (i = 0; i < width - 2; i++)
                waddch(dialog, ACS_HLINE);
        wattrset(dialog, dlg.dialog.atr);
        waddch(dialog, ACS_RTEE);

        print_title(dialog, title, width);

        wattrset(dialog, dlg.dialog.atr);
        print_autowrap(dialog, prompt, width - 2, 1, 3);

        print_buttons(dialog, height, width, 0);

        while (key != KEY_ESC) {
                key = wgetch(dialog);
                switch (key) {
                case 'Y':
                case 'y':
                        delwin(dialog);
                        return 0;
                case 'N':
                case 'n':
                        delwin(dialog);
                        return 1;

                case TAB:
                case KEY_LEFT:
                case KEY_RIGHT:
                        button = ((key == KEY_LEFT ? --button : ++button) < 0) ? 1 : (button > 1 ? 0 : button);

                        print_buttons(dialog, height, width, button);
                        wrefresh(dialog);
                        break;
                case ' ':
                case '\n':
                        delwin(dialog);
                        return button;
                case KEY_ESC:
                        key = on_key_esc(dialog);
                        break;
                case KEY_RESIZE:
                        delwin(dialog);
                        on_key_resize();
                        goto do_resize;
                }
        }

        delwin(dialog);
        return key;             /* ESC pressed */
}