/*
 *  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 + 4))
        return -ERRDISPLAYTOOSMALL;
    if (getmaxx(stdscr) < (width + 4))
        return -ERRDISPLAYTOOSMALL;

    /*
     * 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, 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 */
}
