/*

 *  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"

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, gettext("  Ok  "), y, x, selected == 0);

	print_button(dialog, gettext(" 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;

	char *instr = dialog_input_result;

	WINDOW *dialog;

	if (!init)

		instr[0] = '\0';

	else

		strcpy(instr, init);

do_resize:

	if (getmaxy(stdscr) <= (height - 2))

		return -ERRDISPLAYTOOSMALL;

	if (getmaxx(stdscr) <= (width - 2))

		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);

	/* 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,

		 dlg.dialog.atr, dlg.border.atr);

	print_buttons(dialog, height, width, 0);

	/* Set up the initial value */

	wmove(dialog, box_y, box_x);

	wattrset(dialog, dlg.inputbox.atr);

	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 != 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, dlg.inputbox.atr);

					if (!input_x) {

						scroll = scroll < box_width - 1 ? 0 : 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, dlg.inputbox.atr);

						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 = KEY_ESC;

			break;

		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;		/* ESC pressed */

}