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/*

 *  util.c

 *

 *  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"

/* use colors by default? */

bool use_colors = 1;

const char *backtitle = NULL;

const char *dialog_result;

/*

 * Attribute values, default is for mono display

 */

chtype attributes[] =

{

    A_NORMAL,                   /* screen_attr */

    A_NORMAL,                   /* shadow_attr */

    A_NORMAL,                   /* dialog_attr */

    A_BOLD,                     /* title_attr */

    A_NORMAL,                   /* border_attr */

    A_REVERSE,                  /* button_active_attr */

    A_DIM,                      /* button_inactive_attr */

    A_REVERSE,                  /* button_key_active_attr */

    A_BOLD,                     /* button_key_inactive_attr */

    A_REVERSE,                  /* button_label_active_attr */

    A_NORMAL,                   /* button_label_inactive_attr */

    A_NORMAL,                   /* inputbox_attr */

    A_NORMAL,                   /* inputbox_border_attr */

    A_NORMAL,                   /* searchbox_attr */

    A_BOLD,                     /* searchbox_title_attr */

    A_NORMAL,                   /* searchbox_border_attr */

    A_BOLD,                     /* position_indicator_attr */

    A_NORMAL,                   /* menubox_attr */

    A_NORMAL,                   /* menubox_border_attr */

    A_NORMAL,                   /* item_attr */

    A_REVERSE,                  /* item_selected_attr */

    A_BOLD,                     /* tag_attr */

    A_REVERSE,                  /* tag_selected_attr */

    A_BOLD,                     /* tag_key_attr */

    A_REVERSE,                  /* tag_key_selected_attr */

    A_BOLD,                     /* check_attr */

    A_REVERSE,                  /* check_selected_attr */

    A_BOLD,                     /* uarrow_attr */

    A_BOLD                      /* darrow_attr */

};

#include "colors.h"

/*

 * Table of color values

 */

int color_table[][3] =

{

    {SCREEN_FG, SCREEN_BG, SCREEN_HL},

    {SHADOW_FG, SHADOW_BG, SHADOW_HL},

    {DIALOG_FG, DIALOG_BG, DIALOG_HL},

    {TITLE_FG, TITLE_BG, TITLE_HL},

    {BORDER_FG, BORDER_BG, BORDER_HL},

    {BUTTON_ACTIVE_FG, BUTTON_ACTIVE_BG, BUTTON_ACTIVE_HL},

    {BUTTON_INACTIVE_FG, BUTTON_INACTIVE_BG, BUTTON_INACTIVE_HL},

    {BUTTON_KEY_ACTIVE_FG, BUTTON_KEY_ACTIVE_BG, BUTTON_KEY_ACTIVE_HL},

    {BUTTON_KEY_INACTIVE_FG, BUTTON_KEY_INACTIVE_BG, BUTTON_KEY_INACTIVE_HL},

    {BUTTON_LABEL_ACTIVE_FG, BUTTON_LABEL_ACTIVE_BG, BUTTON_LABEL_ACTIVE_HL},

    {BUTTON_LABEL_INACTIVE_FG, BUTTON_LABEL_INACTIVE_BG,

     BUTTON_LABEL_INACTIVE_HL},

    {INPUTBOX_FG, INPUTBOX_BG, INPUTBOX_HL},

    {INPUTBOX_BORDER_FG, INPUTBOX_BORDER_BG, INPUTBOX_BORDER_HL},

    {SEARCHBOX_FG, SEARCHBOX_BG, SEARCHBOX_HL},

    {SEARCHBOX_TITLE_FG, SEARCHBOX_TITLE_BG, SEARCHBOX_TITLE_HL},

    {SEARCHBOX_BORDER_FG, SEARCHBOX_BORDER_BG, SEARCHBOX_BORDER_HL},

    {POSITION_INDICATOR_FG, POSITION_INDICATOR_BG, POSITION_INDICATOR_HL},

    {MENUBOX_FG, MENUBOX_BG, MENUBOX_HL},

    {MENUBOX_BORDER_FG, MENUBOX_BORDER_BG, MENUBOX_BORDER_HL},

    {ITEM_FG, ITEM_BG, ITEM_HL},

    {ITEM_SELECTED_FG, ITEM_SELECTED_BG, ITEM_SELECTED_HL},

    {TAG_FG, TAG_BG, TAG_HL},

    {TAG_SELECTED_FG, TAG_SELECTED_BG, TAG_SELECTED_HL},

    {TAG_KEY_FG, TAG_KEY_BG, TAG_KEY_HL},

    {TAG_KEY_SELECTED_FG, TAG_KEY_SELECTED_BG, TAG_KEY_SELECTED_HL},

    {CHECK_FG, CHECK_BG, CHECK_HL},

    {CHECK_SELECTED_FG, CHECK_SELECTED_BG, CHECK_SELECTED_HL},

    {UARROW_FG, UARROW_BG, UARROW_HL},

    {DARROW_FG, DARROW_BG, DARROW_HL},

};                              /* color_table */

/*

 * Set window to attribute 'attr'

 */

void

attr_clear (WINDOW * win, int height, int width, chtype attr)

{

    int i, j;

    wattrset (win, attr);

    for (i = 0; i < height; i++) {

        wmove (win, i, 0);

        for (j = 0; j < width; j++)

            waddch (win, ' ');

    }

    touchwin (win);

}

void dialog_clear (void)

{

    attr_clear (stdscr, LINES, COLS, screen_attr);

    /* Display background title if it exists ... - SLH */

    if (backtitle != NULL) {

        int i;

        wattrset (stdscr, screen_attr);

        mvwaddstr (stdscr, 0, 1, (char *)backtitle);

        wmove (stdscr, 1, 1);

        for (i = 1; i < COLS - 1; i++)

            waddch (stdscr, ACS_HLINE);

    }

    wnoutrefresh (stdscr);

}

/*

 * Do some initialization for dialog

 */

void

init_dialog (void)

{

    initscr ();                 /* Init curses */

    keypad (stdscr, TRUE);

    cbreak ();

    noecho ();

    if (use_colors)     /* Set up colors */

        color_setup ();

    dialog_clear ();

}

/*

 * Setup for color display

 */

void

color_setup (void)

{

    int i;

    if (has_colors ()) {        /* Terminal supports color? */

        start_color ();

        /* Initialize color pairs */

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

            init_pair (i + 1, color_table[i][0], color_table[i][1]);

        /* Setup color attributes */

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

            attributes[i] = C_ATTR (color_table[i][2], i + 1);

    }

}

/*

 * End using dialog functions.

 */

void

end_dialog (void)

{

    endwin ();

}

/*

 * Print a string of text in a window, automatically wrap around to the

 * next line if the string is too long to fit on one line. Newline

 * characters '\n' are replaced by spaces.  We start on a new line

 * if there is no room for at least 4 nonblanks following a double-space.

 */

void

print_autowrap (WINDOW * win, const char *prompt, int width, int y, int x)

{

    int newl, cur_x, cur_y;

    int i, prompt_len, room, wlen;

    char tempstr[MAX_LEN + 1], *word, *sp, *sp2;

    strcpy (tempstr, prompt);

    prompt_len = strlen(tempstr);

    /*

     * Remove newlines

     */

    for(i=0; i<prompt_len; i++) {

        if(tempstr[i] == '\n') tempstr[i] = ' ';

    }

    if (prompt_len <= width - x * 2) {  /* If prompt is short */

        wmove (win, y, (width - prompt_len) / 2);

        waddstr (win, tempstr);

    } else {

        cur_x = x;

        cur_y = y;

        newl = 1;

        word = tempstr;

        while (word && *word) {

            sp = index(word, ' ');

            if (sp)

                *sp++ = 0;

            /* Wrap to next line if either the word does not fit,

               or it is the first word of a new sentence, and it is

               short, and the next word does not fit. */

            room = width - cur_x;

            wlen = strlen(word);

            if (wlen > room ||

               (newl && wlen < 4 && sp && wlen+1+strlen(sp) > room

                     && (!(sp2 = index(sp, ' ')) || wlen+1+(sp2-sp) > room))) {

                cur_y++;

                cur_x = x;

            }

            wmove (win, cur_y, cur_x);

            waddstr (win, word);

            getyx (win, cur_y, cur_x);

            cur_x++;

            if (sp && *sp == ' ') {

                cur_x++;        /* double space */

                while (*++sp == ' ');

                newl = 1;

            } else

                newl = 0;

            word = sp;

        }

    }

}

/*

 * Print a button

 */

void

print_button (WINDOW * win, const char *label, int y, int x, int selected)

{

    int i, temp;

    wmove (win, y, x);

    wattrset (win, selected ? button_active_attr : button_inactive_attr);

    waddstr (win, "<");

    temp = strspn (label, " ");

    label += temp;

    wattrset (win, selected ? button_label_active_attr

              : button_label_inactive_attr);

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

        waddch (win, ' ');

    wattrset (win, selected ? button_key_active_attr

              : button_key_inactive_attr);

    waddch (win, label[0]);

    wattrset (win, selected ? button_label_active_attr

              : button_label_inactive_attr);

    waddstr (win, (char *)label + 1);

    wattrset (win, selected ? button_active_attr : button_inactive_attr);

    waddstr (win, ">");

    wmove (win, y, x + temp + 1);

}

/*

 * Draw a rectangular box with line drawing characters

 */

void

draw_box (WINDOW * win, int y, int x, int height, int width,

          chtype box, chtype border)

{

    int i, j;

    wattrset (win, 0);

    for (i = 0; i < height; i++) {

        wmove (win, y + i, x);

        for (j = 0; j < width; j++)

            if (!i && !j)

                waddch (win, border | ACS_ULCORNER);

            else if (i == height - 1 && !j)

                waddch (win, border | ACS_LLCORNER);

            else if (!i && j == width - 1)

                waddch (win, box | ACS_URCORNER);

            else if (i == height - 1 && j == width - 1)

                waddch (win, box | ACS_LRCORNER);

            else if (!i)

                waddch (win, border | ACS_HLINE);

            else if (i == height - 1)

                waddch (win, box | ACS_HLINE);

            else if (!j)

                waddch (win, border | ACS_VLINE);

            else if (j == width - 1)

                waddch (win, box | ACS_VLINE);

            else

                waddch (win, box | ' ');

    }

}

/*

 * Draw shadows along the right and bottom edge to give a more 3D look

 * to the boxes

 */

void

draw_shadow (WINDOW * win, int y, int x, int height, int width)

{

    int i;

    if (has_colors ()) {        /* Whether terminal supports color? */

        wattrset (win, shadow_attr);

        wmove (win, y + height, x + 2);

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

            waddch (win, winch (win) & A_CHARTEXT);

        for (i = y + 1; i < y + height + 1; i++) {

            wmove (win, i, x + width);

            waddch (win, winch (win) & A_CHARTEXT);

            waddch (win, winch (win) & A_CHARTEXT);

        }

        wnoutrefresh (win);

    }

}

/*

 *  Return the position of the first alphabetic character in a string.

 */

int

first_alpha(const char *string, const char *exempt)

{

        int i, in_paren=0, c;

        for (i = 0; i < strlen(string); i++) {

                c = tolower(string[i]);

                if (strchr("<[(", c)) ++in_paren;

                if (strchr(">])", c)) --in_paren;

                if ((! in_paren) && isalpha(c) &&

                     strchr(exempt, c) == 0)

                        return i;

        }

        return 0;

}