1/*
2 *  $Id: yesno.c,v 1.62 2018/06/19 22:57:01 tom Exp $
3 *
4 *  yesno.c -- implements the yes/no box
5 *
6 *  Copyright 1999-2012,2018	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 = 0, fkey;
48    int code;
49    int button = dlg_default_button();
50    WINDOW *dialog = 0;
51    int result = DLG_EXIT_UNKNOWN;
52    char *prompt;
53    const char **buttons = dlg_yes_labels();
54    int min_width = 25;
55    bool show = TRUE;
56    int page, last = 0, offset = 0;
57
58#ifdef KEY_RESIZE
59    int req_high = height;
60    int req_wide = width;
61#endif
62
63    DLG_TRACE(("# yesno args:\n"));
64    DLG_TRACE2S("title", title);
65    DLG_TRACE2S("message", cprompt);
66    DLG_TRACE2N("height", height);
67    DLG_TRACE2N("width", width);
68
69#ifdef KEY_RESIZE
70  restart:
71#endif
72    prompt = dlg_strclone(cprompt);
73    dlg_tab_correct_str(prompt);
74    dlg_button_layout(buttons, &min_width);
75    dlg_auto_size(title, prompt, &height, &width, 2, min_width);
76    dlg_print_size(height, width);
77    dlg_ctl_size(height, width);
78
79    x = dlg_box_x_ordinate(width);
80    y = dlg_box_y_ordinate(height);
81
82#ifdef KEY_RESIZE
83    if (dialog != 0)
84	dlg_move_window(dialog, height, width, y, x);
85    else
86#endif
87    {
88	dialog = dlg_new_window(height, width, y, x);
89	dlg_register_window(dialog, "yesno", binding);
90	dlg_register_buttons(dialog, "yesno", buttons);
91    }
92
93    dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
94    dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
95    dlg_draw_title(dialog, title);
96    dlg_draw_helpline(dialog, FALSE);
97
98    dlg_attrset(dialog, dialog_attr);
99
100    page = height - (1 + 3 * MARGIN);
101    dlg_draw_buttons(dialog,
102		     height - 2 * MARGIN, 0,
103		     buttons, button, FALSE, width);
104
105    while (result == DLG_EXIT_UNKNOWN) {
106	if (show) {
107	    last = dlg_print_scrolled(dialog, prompt, offset,
108				      page, width, TRUE);
109	    dlg_trace_win(dialog);
110	    show = FALSE;
111	}
112	key = dlg_mouse_wgetch(dialog, &fkey);
113	if (dlg_result_key(key, fkey, &result))
114	    break;
115	if ((code = dlg_char_to_button(key, buttons)) >= 0) {
116	    result = dlg_ok_buttoncode(code);
117	    break;
118	}
119	/* handle function keys */
120	if (fkey) {
121	    switch (key) {
122	    case DLGK_FIELD_NEXT:
123		button = dlg_next_button(buttons, button);
124		if (button < 0)
125		    button = 0;
126		dlg_draw_buttons(dialog,
127				 height - 2, 0,
128				 buttons, button,
129				 FALSE, width);
130		break;
131	    case DLGK_FIELD_PREV:
132		button = dlg_prev_button(buttons, button);
133		if (button < 0)
134		    button = 0;
135		dlg_draw_buttons(dialog,
136				 height - 2, 0,
137				 buttons, button,
138				 FALSE, width);
139		break;
140	    case DLGK_ENTER:
141		result = dlg_yes_buttoncode(button);
142		break;
143#ifdef KEY_RESIZE
144	    case KEY_RESIZE:
145		dlg_will_resize(dialog);
146		dlg_clear();
147		free(prompt);
148		height = req_high;
149		width = req_wide;
150		show = TRUE;
151		goto restart;
152#endif
153	    default:
154		if (is_DLGK_MOUSE(key)) {
155		    result = dlg_yes_buttoncode(key - M_EVENT);
156		    if (result < 0)
157			result = DLG_EXIT_OK;
158		} else if (dlg_check_scrolled(key, last, page,
159					      &show, &offset) != 0) {
160		    beep();
161		}
162		break;
163	    }
164	} else {
165	    beep();
166	}
167    }
168
169    dlg_del_window(dialog);
170    dlg_mouse_free_regions();
171    free(prompt);
172    return result;
173}
174