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/*

 *  inputbox.c -- implements the input 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"

unsigned char dialog_input_result[MAX_LEN + 1];

/*

 *  Print the termination buttons

 */

static void

print_buttons(WINDOW *dialog, int height, int width, int selected)

{

    int x = width / 2 - 11;

    int y = height - 2;

    print_button (dialog, "  Ok  ", y, x, selected==0);

    print_button (dialog, " Help ", y, x + 14, selected==1);

    wmove(dialog, y, x+1+14*selected);

    wrefresh(dialog);

}

/*

 * Display a dialog box for inputing a string

 */

int

dialog_inputbox (const char *title, const char *prompt, int height, int width,

                 const char *init)

{

    int i, x, y, box_y, box_x, box_width;

    int input_x = 0, scroll = 0, key = 0, button = -1;

    unsigned char *instr = dialog_input_result;

    WINDOW *dialog;

    /* 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);

    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);

    /* Draw the input field box */

    box_width = width - 6;

    getyx (dialog, y, x);

    box_y = y + 2;

    box_x = (width - box_width) / 2;

    draw_box (dialog, y + 1, box_x - 1, 3, box_width + 2,

              border_attr, dialog_attr);

    print_buttons(dialog, height, width, 0);

    /* Set up the initial value */

    wmove (dialog, box_y, box_x);

    wattrset (dialog, inputbox_attr);

    if (!init)

        instr[0] = '\0';

    else

        strcpy (instr, init);

    input_x = strlen (instr);

    if (input_x >= box_width) {

        scroll = input_x - box_width + 1;

        input_x = box_width - 1;

        for (i = 0; i < box_width - 1; i++)

            waddch (dialog, instr[scroll + i]);

    } else

        waddstr (dialog, instr);

    wmove (dialog, box_y, box_x + input_x);

    wrefresh (dialog);

    while (key != ESC) {

        key = wgetch (dialog);

        if (button == -1) {     /* Input box selected */

            switch (key) {

            case TAB:

            case KEY_UP:

            case KEY_DOWN:

                break;

            case KEY_LEFT:

                continue;

            case KEY_RIGHT:

                continue;

            case KEY_BACKSPACE:

            case 127:

                if (input_x || scroll) {

                    wattrset (dialog, inputbox_attr);

                    if (!input_x) {

                        scroll = scroll < box_width - 1 ?

                        wmove (dialog, box_y, box_x);

                        for (i = 0; i < box_width; i++)

                            waddch (dialog, instr[scroll + input_x + i] ?

                                    instr[scroll + input_x + i] : ' ');

                        input_x = strlen (instr) - scroll;

                    } else

                        input_x--;

                    instr[scroll + input_x] = '\0';

                    mvwaddch (dialog, box_y, input_x + box_x, ' ');

                    wmove (dialog, box_y, input_x + box_x);

                    wrefresh (dialog);

                }

                continue;

            default:

                if (key < 0x100 && isprint (key)) {

                    if (scroll + input_x < MAX_LEN) {

                        wattrset (dialog, inputbox_attr);

                        instr[scroll + input_x] = key;

                        instr[scroll + input_x + 1] = '\0';

                        if (input_x == box_width - 1) {

                            scroll++;

                            wmove (dialog, box_y, box_x);

                            for (i = 0; i < box_width - 1; i++)

                                waddch (dialog, instr[scroll + i]);

                        } else {

                            wmove (dialog, box_y, input_x++ + box_x);

                            waddch (dialog, key);

                        }

                        wrefresh (dialog);

                    } else

                        flash ();       /* Alarm user about overflow */

                    continue;

                }

            }

        }

        switch (key) {

        case 'O':

        case 'o':

            delwin (dialog);

            return 0;

        case 'H':

        case 'h':

            delwin (dialog);

            return 1;

        case KEY_UP:

        case KEY_LEFT:

            switch (button) {

            case -1:

                button = 1;     /* Indicates "Cancel" button is selected */

                print_buttons(dialog, height, width, 1);

                break;

            case 0:

                button = -1;    /* Indicates input box is selected */

                print_buttons(dialog, height, width, 0);

                wmove (dialog, box_y, box_x + input_x);

                wrefresh (dialog);

                break;

            case 1:

                button = 0;      /* Indicates "OK" button is selected */

                print_buttons(dialog, height, width, 0);

                break;

            }

            break;

        case TAB:

        case KEY_DOWN:

        case KEY_RIGHT:

            switch (button) {

            case -1:

                button = 0;      /* Indicates "OK" button is selected */

                print_buttons(dialog, height, width, 0);

                break;

            case 0:

                button = 1;     /* Indicates "Cancel" button is selected */

                print_buttons(dialog, height, width, 1);

                break;

            case 1:

                button = -1;    /* Indicates input box is selected */

                print_buttons(dialog, height, width, 0);

                wmove (dialog, box_y, box_x + input_x);

                wrefresh (dialog);

                break;

            }

            break;

        case ' ':

        case '\n':

            delwin (dialog);

            return (button == -1 ? 0 : button);

        case 'X':

        case 'x':

            key = ESC;

        case ESC:

            break;

        }

    }

    delwin (dialog);

    return -1;                  /* ESC pressed */

}