1/*
2 *  $Id: yesno.c,v 1.71 2020/11/23 00:48:08 tom Exp $
3 *
4 *  yesno.c -- implements the yes/no box
5 *
6 *  Copyright 1999-2019,2020	Thomas E. Dickey
7 *
8 *  This program is free software; you can redistribute it and/or modify
9 *  it under the terms of the GNU Lesser General Public License, version 2.1
10 *  as published by the Free Software Foundation.
11 *
12 *  This program is distributed in the hope that it will be useful, but
13 *  WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 *  Lesser General Public License for more details.
16 *
17 *  You should have received a copy of the GNU Lesser General Public
18 *  License along with this program; if not, write to
19 *	Free Software Foundation, Inc.
20 *	51 Franklin St., Fifth Floor
21 *	Boston, MA 02110, USA.
22 *
23 *  An earlier version of this program lists as authors
24 *	Savio Lam (lam836@cs.cuhk.hk)
25 */
26
27#include <dialog.h>
28#include <dlg_keys.h>
29
30/*
31 * Display a dialog box with two buttons - Yes and No.
32 */
33int
34dialog_yesno(const char *title, const char *cprompt, int height, int width)
35{
36    /* *INDENT-OFF* */
37    static DLG_KEYS_BINDING binding[] = {
38	HELPKEY_BINDINGS,
39	ENTERKEY_BINDINGS,
40	SCROLLKEY_BINDINGS,
41	TRAVERSE_BINDINGS,
42	END_KEYS_BINDING
43    };
44    /* *INDENT-ON* */
45
46    int x, y;
47    int key, fkey;
48    int button = dlg_default_button();
49    WINDOW *dialog = 0;
50    int result = DLG_EXIT_UNKNOWN;
51    char *prompt;
52    const char **buttons = dlg_yes_labels();
53    int min_width = 25;
54    bool show = TRUE;
55    int page, last = 0, offset = 0;
56
57#ifdef KEY_RESIZE
58    int req_high = height;
59    int req_wide = width;
60#endif
61
62    DLG_TRACE(("# yesno args:\n"));
63    DLG_TRACE2S("title", title);
64    DLG_TRACE2S("message", cprompt);
65    DLG_TRACE2N("height", height);
66    DLG_TRACE2N("width", width);
67
68#ifdef KEY_RESIZE
69  restart:
70#endif
71    prompt = dlg_strclone(cprompt);
72    dlg_tab_correct_str(prompt);
73    dlg_button_layout(buttons, &min_width);
74    dlg_auto_size(title, prompt, &height, &width, 2, min_width);
75    dlg_print_size(height, width);
76    dlg_ctl_size(height, width);
77
78    x = dlg_box_x_ordinate(width);
79    y = dlg_box_y_ordinate(height);
80
81    dialog = dlg_new_window(height, width, y, x);
82    dlg_register_window(dialog, "yesno", binding);
83    dlg_register_buttons(dialog, "yesno", buttons);
84
85    dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
86    dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
87    dlg_draw_title(dialog, title);
88    dlg_draw_helpline(dialog, FALSE);
89
90    dlg_attrset(dialog, dialog_attr);
91
92    page = height - (1 + 3 * MARGIN);
93    dlg_draw_buttons(dialog,
94		     height - 2 * MARGIN, 0,
95		     buttons, button, FALSE, width);
96
97    while (result == DLG_EXIT_UNKNOWN) {
98	int code;
99
100	if (show) {
101	    last = dlg_print_scrolled(dialog, prompt, offset,
102				      page, width, TRUE);
103	    dlg_trace_win(dialog);
104	    show = FALSE;
105	}
106	key = dlg_mouse_wgetch(dialog, &fkey);
107	if (dlg_result_key(key, fkey, &result)) {
108	    if (!dlg_button_key(result, &button, &key, &fkey))
109		break;
110	}
111	if ((code = dlg_char_to_button(key, buttons)) >= 0) {
112	    result = dlg_ok_buttoncode(code);
113	    break;
114	}
115	/* handle function keys */
116	if (fkey) {
117	    switch (key) {
118	    case DLGK_FIELD_NEXT:
119		button = dlg_next_button(buttons, button);
120		if (button < 0)
121		    button = 0;
122		dlg_draw_buttons(dialog,
123				 height - 2, 0,
124				 buttons, button,
125				 FALSE, width);
126		break;
127	    case DLGK_FIELD_PREV:
128		button = dlg_prev_button(buttons, button);
129		if (button < 0)
130		    button = 0;
131		dlg_draw_buttons(dialog,
132				 height - 2, 0,
133				 buttons, button,
134				 FALSE, width);
135		break;
136	    case DLGK_ENTER:
137	    case DLGK_LEAVE:
138		result = dlg_yes_buttoncode(button);
139		break;
140#ifdef KEY_RESIZE
141	    case KEY_RESIZE:
142		dlg_will_resize(dialog);
143		height = req_high;
144		width = req_wide;
145		show = TRUE;
146		free(prompt);
147		_dlg_resize_cleanup(dialog);
148		goto restart;
149#endif
150	    default:
151		if (is_DLGK_MOUSE(key)) {
152		    result = dlg_yes_buttoncode(key - M_EVENT);
153		    if (result < 0)
154			result = DLG_EXIT_OK;
155		} else if (dlg_check_scrolled(key, last, page,
156					      &show, &offset) != 0) {
157		    beep();
158		}
159		break;
160	    }
161	} else if (key > 0) {
162	    beep();
163	}
164    }
165    dlg_add_last_key(-1);
166
167    dlg_del_window(dialog);
168    dlg_mouse_free_regions();
169    free(prompt);
170    return result;
171}
172