/*

  *  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"

 struct dialog_info dlg;

 static void set_mono_theme(void)

 {

 	dlg.screen.atr = A_NORMAL;

 	dlg.shadow.atr = A_NORMAL;

 	dlg.dialog.atr = A_NORMAL;

 	dlg.title.atr = A_BOLD;

 	dlg.border.atr = A_NORMAL;

 	dlg.button_active.atr = A_REVERSE;

 	dlg.button_inactive.atr = A_DIM;

 	dlg.button_key_active.atr = A_REVERSE;

 	dlg.button_key_inactive.atr = A_BOLD;

 	dlg.button_label_active.atr = A_REVERSE;

 	dlg.button_label_inactive.atr = A_NORMAL;

 	dlg.inputbox.atr = A_NORMAL;

 	dlg.inputbox_border.atr = A_NORMAL;

 	dlg.searchbox.atr = A_NORMAL;

 	dlg.searchbox_title.atr = A_BOLD;

 	dlg.searchbox_border.atr = A_NORMAL;

 	dlg.position_indicator.atr = A_BOLD;

 	dlg.menubox.atr = A_NORMAL;

 	dlg.menubox_border.atr = A_NORMAL;

 	dlg.item.atr = A_NORMAL;

 	dlg.item_selected.atr = A_REVERSE;

 	dlg.tag.atr = A_BOLD;

 	dlg.tag_selected.atr = A_REVERSE;

 	dlg.tag_key.atr = A_BOLD;

 	dlg.tag_key_selected.atr = A_REVERSE;

 	dlg.check.atr = A_BOLD;

 	dlg.check_selected.atr = A_REVERSE;

 	dlg.uarrow.atr = A_BOLD;

 	dlg.darrow.atr = A_BOLD;

 }

 #define DLG_COLOR(dialog, f, b, h) \

 do {                               \

 	dlg.dialog.fg = (f);       \

 	dlg.dialog.bg = (b);       \

 	dlg.dialog.hl = (h);       \

 } while (0)

 static void set_classic_theme(void)

 {

 	DLG_COLOR(screen,                COLOR_CYAN,   COLOR_BLUE,   true);

 	DLG_COLOR(shadow,                COLOR_BLACK,  COLOR_BLACK,  true);

 	DLG_COLOR(dialog,                COLOR_BLACK,  COLOR_WHITE,  false);

 	DLG_COLOR(title,                 COLOR_YELLOW, COLOR_WHITE,  true);

 	DLG_COLOR(border,                COLOR_WHITE,  COLOR_WHITE,  true);

 	DLG_COLOR(button_active,         COLOR_WHITE,  COLOR_BLUE,   true);

 	DLG_COLOR(button_inactive,       COLOR_BLACK,  COLOR_WHITE,  false);

 	DLG_COLOR(button_key_active,     COLOR_WHITE,  COLOR_BLUE,   true);

 	DLG_COLOR(button_key_inactive,   COLOR_RED,    COLOR_WHITE,  false);

 	DLG_COLOR(button_label_active,   COLOR_YELLOW, COLOR_BLUE,   true);

 	DLG_COLOR(button_label_inactive, COLOR_BLACK,  COLOR_WHITE,  true);

 	DLG_COLOR(inputbox,              COLOR_BLACK,  COLOR_WHITE,  false);

 	DLG_COLOR(inputbox_border,       COLOR_BLACK,  COLOR_WHITE,  false);

 	DLG_COLOR(searchbox,             COLOR_BLACK,  COLOR_WHITE,  false);

 	DLG_COLOR(searchbox_title,       COLOR_YELLOW, COLOR_WHITE,  true);

 	DLG_COLOR(searchbox_border,      COLOR_WHITE,  COLOR_WHITE,  true);

 	DLG_COLOR(position_indicator,    COLOR_YELLOW, COLOR_WHITE,  true);

 	DLG_COLOR(menubox,               COLOR_BLACK,  COLOR_WHITE,  false);

 	DLG_COLOR(menubox_border,        COLOR_WHITE,  COLOR_WHITE,  true);

 	DLG_COLOR(item,                  COLOR_BLACK,  COLOR_WHITE,  false);

 	DLG_COLOR(item_selected,         COLOR_WHITE,  COLOR_BLUE,   true);

 	DLG_COLOR(tag,                   COLOR_YELLOW, COLOR_WHITE,  true);

 	DLG_COLOR(tag_selected,          COLOR_YELLOW, COLOR_BLUE,   true);

 	DLG_COLOR(tag_key,               COLOR_YELLOW, COLOR_WHITE,  true);

 	DLG_COLOR(tag_key_selected,      COLOR_YELLOW, COLOR_BLUE,   true);

 	DLG_COLOR(check,                 COLOR_BLACK,  COLOR_WHITE,  false);

 	DLG_COLOR(check_selected,        COLOR_WHITE,  COLOR_BLUE,   true);

 	DLG_COLOR(uarrow,                COLOR_GREEN,  COLOR_WHITE,  true);

 	DLG_COLOR(darrow,                COLOR_GREEN,  COLOR_WHITE,  true);

 }

 static void set_blackbg_theme(void)

 {

 	DLG_COLOR(screen, COLOR_RED,   COLOR_BLACK, true);

 	DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, false);

 	DLG_COLOR(dialog, COLOR_WHITE, COLOR_BLACK, false);

 	DLG_COLOR(title,  COLOR_RED,   COLOR_BLACK, false);

 	DLG_COLOR(border, COLOR_BLACK, COLOR_BLACK, true);

 	DLG_COLOR(button_active,         COLOR_YELLOW, COLOR_RED,   false);

 	DLG_COLOR(button_inactive,       COLOR_YELLOW, COLOR_BLACK, false);

 	DLG_COLOR(button_key_active,     COLOR_YELLOW, COLOR_RED,   true);

 	DLG_COLOR(button_key_inactive,   COLOR_RED,    COLOR_BLACK, false);

 	DLG_COLOR(button_label_active,   COLOR_WHITE,  COLOR_RED,   false);

 	DLG_COLOR(button_label_inactive, COLOR_BLACK,  COLOR_BLACK, true);

 	DLG_COLOR(inputbox,         COLOR_YELLOW, COLOR_BLACK, false);

 	DLG_COLOR(inputbox_border,  COLOR_YELLOW, COLOR_BLACK, false);

 	DLG_COLOR(searchbox,        COLOR_YELLOW, COLOR_BLACK, false);

 	DLG_COLOR(searchbox_title,  COLOR_YELLOW, COLOR_BLACK, true);

 	DLG_COLOR(searchbox_border, COLOR_BLACK,  COLOR_BLACK, true);

 	DLG_COLOR(position_indicator, COLOR_RED, COLOR_BLACK,  false);

 	DLG_COLOR(menubox,          COLOR_YELLOW, COLOR_BLACK, false);

 	DLG_COLOR(menubox_border,   COLOR_BLACK,  COLOR_BLACK, true);

 	DLG_COLOR(item,             COLOR_WHITE, COLOR_BLACK, false);

 	DLG_COLOR(item_selected,    COLOR_WHITE, COLOR_RED,   false);

 	DLG_COLOR(tag,              COLOR_RED,    COLOR_BLACK, false);

 	DLG_COLOR(tag_selected,     COLOR_YELLOW, COLOR_RED,   true);

 	DLG_COLOR(tag_key,          COLOR_RED,    COLOR_BLACK, false);

 	DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_RED,   true);

 	DLG_COLOR(check,            COLOR_YELLOW, COLOR_BLACK, false);

 	DLG_COLOR(check_selected,   COLOR_YELLOW, COLOR_RED,   true);

 	DLG_COLOR(uarrow, COLOR_RED, COLOR_BLACK, false);

 	DLG_COLOR(darrow, COLOR_RED, COLOR_BLACK, false);

 }

 static void set_bluetitle_theme(void)

 {

 	set_classic_theme();

 	DLG_COLOR(title,               COLOR_BLUE,   COLOR_WHITE, true);

 	DLG_COLOR(button_key_active,   COLOR_YELLOW, COLOR_BLUE,  true);

 	DLG_COLOR(button_label_active, COLOR_WHITE,  COLOR_BLUE,  true);

 	DLG_COLOR(searchbox_title,     COLOR_BLUE,   COLOR_WHITE, true);

 	DLG_COLOR(position_indicator,  COLOR_BLUE,   COLOR_WHITE, true);

 	DLG_COLOR(tag,                 COLOR_BLUE,   COLOR_WHITE, true);

 	DLG_COLOR(tag_key,             COLOR_BLUE,   COLOR_WHITE, true);

 }

 /*

  * Select color theme

  */

 static int set_theme(const char *theme)

 {

 	int use_color = 1;

 	if (!theme)

 		set_bluetitle_theme();

 	else if (strcmp(theme, "classic") == 0)

 		set_classic_theme();

 	else if (strcmp(theme, "bluetitle") == 0)

 		set_bluetitle_theme();

 	else if (strcmp(theme, "blackbg") == 0)

 		set_blackbg_theme();

 	else if (strcmp(theme, "mono") == 0)

 		use_color = 0;

 	return use_color;

 }

 static void init_one_color(struct dialog_color *color)

 {

 	static int pair = 0;

 	pair++;

 	init_pair(pair, color->fg, color->bg);

 	if (color->hl)

 		color->atr = A_BOLD | COLOR_PAIR(pair);

 	else

 		color->atr = COLOR_PAIR(pair);

 }

 static void init_dialog_colors(void)

 {

 	init_one_color(&dlg.screen);

 	init_one_color(&dlg.shadow);

 	init_one_color(&dlg.dialog);

 	init_one_color(&dlg.title);

 	init_one_color(&dlg.border);

 	init_one_color(&dlg.button_active);

 	init_one_color(&dlg.button_inactive);

 	init_one_color(&dlg.button_key_active);

 	init_one_color(&dlg.button_key_inactive);

 	init_one_color(&dlg.button_label_active);

 	init_one_color(&dlg.button_label_inactive);

 	init_one_color(&dlg.inputbox);

 	init_one_color(&dlg.inputbox_border);

 	init_one_color(&dlg.searchbox);

 	init_one_color(&dlg.searchbox_title);

 	init_one_color(&dlg.searchbox_border);

 	init_one_color(&dlg.position_indicator);

 	init_one_color(&dlg.menubox);

 	init_one_color(&dlg.menubox_border);

 	init_one_color(&dlg.item);

 	init_one_color(&dlg.item_selected);

 	init_one_color(&dlg.tag);

 	init_one_color(&dlg.tag_selected);

 	init_one_color(&dlg.tag_key);

 	init_one_color(&dlg.tag_key_selected);

 	init_one_color(&dlg.check);

 	init_one_color(&dlg.check_selected);

 	init_one_color(&dlg.uarrow);

 	init_one_color(&dlg.darrow);

 }

 /*

  * Setup for color display

  */

 static void color_setup(const char *theme)

 {

 	int use_color;

 	use_color = set_theme(theme);

 	if (use_color && has_colors()) {

 		start_color();

 		init_dialog_colors();

 	} else

 		set_mono_theme();

 }

 /*

  * 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, dlg.screen.atr);

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

 	if (dlg.backtitle != NULL) {

 		int i;

 		wattrset(stdscr, dlg.screen.atr);

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

 		wmove(stdscr, 1, 1);

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

 			waddch(stdscr, ACS_HLINE);

 	}

 	wnoutrefresh(stdscr);

 }

 /*

  * Do some initialization for dialog

  */

 int init_dialog(const char *backtitle)

 {

 	int height, width;

 	initscr();		/* Init curses */

 	getmaxyx(stdscr, height, width);

 	if (height < 19 || width < 80) {

 		endwin();

 		return -ERRDISPLAYTOOSMALL;

 	}

 	dlg.backtitle = backtitle;

 	color_setup(getenv("MENUCONFIG_COLOR"));

 	keypad(stdscr, TRUE);

 	cbreak();

 	noecho();

 	dialog_clear();

 	return 0;

 }

 void set_dialog_backtitle(const char *backtitle)

 {

 	dlg.backtitle = backtitle;

 }

 /*

  * End using dialog functions.

  */

 void end_dialog(int x, int y)

 {

 	/* move cursor back to original position */

 	move(y, x);

 	refresh();

 	endwin();

 }

 /* Print the title of the dialog. Center the title and truncate

  * tile if wider than dialog (- 2 chars).

  **/

 void print_title(WINDOW *dialog, const char *title, int width)

 {

 	if (title) {

 		int tlen = MIN(width - 2, strlen(title));

 		wattrset(dialog, dlg.title.atr);

 		mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');

 		mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);

 		waddch(dialog, ' ');

 	}

 }

 /*

  * 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 = strchr(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 = strchr(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 ? dlg.button_active.atr

 		 : dlg.button_inactive.atr);

 	waddstr(win, "<");

 	temp = strspn(label, " ");

 	label += temp;

 	wattrset(win, selected ? dlg.button_label_active.atr

 		 : dlg.button_label_inactive.atr);

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

 		waddch(win, ' ');

 	wattrset(win, selected ? dlg.button_key_active.atr

 		 : dlg.button_key_inactive.atr);

 	waddch(win, label[0]);

 	wattrset(win, selected ? dlg.button_label_active.atr

 		 : dlg.button_label_inactive.atr);

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

 	wattrset(win, selected ? dlg.button_active.atr

 		 : dlg.button_inactive.atr);

 	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, dlg.shadow.atr);

 		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 > 0)

 			--in_paren;

 		if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)

 			return i;

 	}

 	return 0;

 }

 /*

  * ncurses uses ESC to detect escaped char sequences. This resutl in

  * a small timeout before ESC is actually delivered to the application.

  * lxdialog suggest <ESC> <ESC> which is correctly translated to two

  * times esc. But then we need to ignore the second esc to avoid stepping

  * out one menu too much. Filter away all escaped key sequences since

  * keypad(FALSE) turn off ncurses support for escape sequences - and thats

  * needed to make notimeout() do as expected.

  */

 int on_key_esc(WINDOW *win)

 {

 	int key;

 	int key2;

 	int key3;

 	nodelay(win, TRUE);

 	keypad(win, FALSE);

 	key = wgetch(win);

 	key2 = wgetch(win);

 	do {

 		key3 = wgetch(win);

 	} while (key3 != ERR);

 	nodelay(win, FALSE);

 	keypad(win, TRUE);

 	if (key == KEY_ESC && key2 == ERR)

 		return KEY_ESC;

 	else if (key != ERR && key != KEY_ESC && key2 == ERR)

 		ungetch(key);

 	return -1;

 }

 /* redraw screen in new size */

 int on_key_resize(void)

 {

 	dialog_clear();

 	return KEY_RESIZE;

 }

 struct dialog_list *item_cur;

 struct dialog_list item_nil;

 struct dialog_list *item_head;

 void item_reset(void)

 {

 	struct dialog_list *p, *next;

 	for (p = item_head; p; p = next) {

 		next = p->next;

 		free(p);

 	}

 	item_head = NULL;

 	item_cur = &item_nil;

 }

 void item_make(const char *fmt, ...)

 {

 	va_list ap;

 	struct dialog_list *p = malloc(sizeof(*p));

 	if (item_head)

 		item_cur->next = p;

 	else

 		item_head = p;

 	item_cur = p;

 	memset(p, 0, sizeof(*p));

 	va_start(ap, fmt);

 	vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);

 	va_end(ap);

 }

 void item_add_str(const char *fmt, ...)

 {

 	va_list ap;

         size_t avail;

 	avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);

 	va_start(ap, fmt);

 	vsnprintf(item_cur->node.str + strlen(item_cur->node.str),

 		  avail, fmt, ap);

 	item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';

 	va_end(ap);

 }

 void item_set_tag(char tag)

 {

 	item_cur->node.tag = tag;

 }

 void item_set_data(void *ptr)

 {

 	item_cur->node.data = ptr;

 }

 void item_set_selected(int val)

 {

 	item_cur->node.selected = val;

 }

 int item_activate_selected(void)

 {

 	item_foreach()

 		if (item_is_selected())

 			return 1;

 	return 0;

 }

 void *item_data(void)

 {

 	return item_cur->node.data;

 }

 char item_tag(void)

 {

 	return item_cur->node.tag;

 }

 int item_count(void)

 {

 	int n = 0;

 	struct dialog_list *p;

 	for (p = item_head; p; p = p->next)

 		n++;

 	return n;

 }

 void item_set(int n)

 {

 	int i = 0;

 	item_foreach()

 		if (i++ == n)

 			return;

 }

 int item_n(void)

 {

 	int n = 0;

 	struct dialog_list *p;

 	for (p = item_head; p; p = p->next) {

 		if (p == item_cur)

 			return n;

 		n++;

 	}

 	return 0;

 }

 const char *item_str(void)

 {

 	return item_cur->node.str;

 }

 int item_is_selected(void)

 {

 	return (item_cur->node.selected != 0);

 }

 int item_is_tag(char tag)

 {

 	return (item_cur->node.tag == tag);

 }