/*
 *  inputbox.c -- implements the input box
 *
 *  AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
 *
 *  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];

/*
 * Display a dialog box for entering a string
 */
int
dialog_inputbox(const char *title, const char *cprompt, int height, int width,
    const char *init, const int password)
{
    /* -1 (input)  =>  0 (Ok)     */
    /*  0 (Ok)     =>  1 (Cancel) */
    /*  1 (Cancel) => -1 (input)  */
    static int forward[] =
    {0, 1, -1};
    /* -1 (input)  =>  1 (Cancel) */
    /*  1 (Cancel) =>  0 (Ok)     */
    /*  0 (Ok)     => -1 (input)  */
    static int backward[] =
    {1, -1, 0};

    int x, y, box_y, box_x, box_width;
    int show_buttons = TRUE, first = TRUE, offset = 0;
    int input_x = 0, key = 0, key2, button = -1;
    char *input = (char *)dialog_input_result;
    WINDOW *dialog;
    char *prompt = strclone(cprompt);
    const char **buttons = dlg_ok_labels();

    tab_correct_str(prompt);
    if (init != NULL) {
	prompt = auto_size(title, prompt, &height, &width, 5,
	    MIN(MAX((int) strlen(init) + 7, 26),
		SCOLS - (dialog_vars.begin_set ? dialog_vars.begin_x : 0)));
    } else
	prompt = auto_size(title, prompt, &height, &width, 5, 26);
    print_size(height, width);
    ctl_size(height, width);

    x = box_x_ordinate(width);
    y = box_y_ordinate(height);

    dialog = new_window(height, width, y, x);

    mouse_setbase(x, y);

    draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
    draw_bottom_box(dialog);
    draw_title(dialog, title);

    wattrset(dialog, dialog_attr);
    print_autowrap(dialog, prompt, width, 1, 2);

    /* Draw the input field box */
    box_width = width - 6;
    getyx(dialog, y, x);
    box_y = y + 2;
    box_x = (width - box_width) / 2;
    mouse_mkregion(y + 1, box_x - 1, 3, box_width + 2, 'i');
    draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
	border_attr, dialog_attr);

    /* Set up the initial value */
    if (!init)
	input[0] = '\0';
    else
	strcpy((char *) input, init);

    wtimeout(dialog, WTIMEOUT_VAL);

    while (key != ESC) {
	int edit = 0;

	/*
	 * The last field drawn determines where the cursor is shown:
	 */
	if (show_buttons) {
	    show_buttons = FALSE;
	    wmove(dialog, box_y, box_x + input_x);
	    dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
	}

	if (!first)
	    key = mouse_wgetch(dialog);

	if (button == -1) {	/* Input box selected */
	    edit = dlg_edit_string(input, &offset, key, first);

	    if (edit) {
		dlg_show_string(dialog, input, offset, inputbox_attr,
		    box_y, box_x, box_width, password, first);
		first = FALSE;
		continue;
	    }
	}

	if ((key2 = dlg_char_to_button(key, buttons)) >= 0) {
	    delwin(dialog);
	    return key2;
	}

	switch (key) {
	case M_EVENT + 'i':	/* mouse enter events */
	case M_EVENT + 'o':	/* use the code for 'UP' */
	case M_EVENT + 'c':
	    button = (key == M_EVENT + 'o') - (key == M_EVENT + 'c');
	    /* FALLTHRU */
	case KEY_BTAB:
	case KEY_UP:
	case KEY_LEFT:
	    show_buttons = TRUE;
	    button = backward[button + 1];
	    if (dialog_vars.nocancel && button > 0)
		button = backward[button + 1];
	    break;
	case TAB:
	case KEY_DOWN:
	case KEY_RIGHT:
	    show_buttons = TRUE;
	    button = forward[button + 1];
	    if (dialog_vars.nocancel && button > 0)
		button = forward[button + 1];
	    break;
	case ' ':
	case '\n':
	    delwin(dialog);
	    return (button > 0);
	}
    }

    delwin(dialog);
    return -1;			/* ESC pressed */
}