1/*
2 *  $Id: msgbox.c,v 1.81 2018/06/21 23:29:59 tom Exp $
3 *
4 *  msgbox.c -- implements the message box and info box
5 *
6 *  Copyright 2000-2012,2018	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 message box. Program will pause and display an "OK" button
32 * if the parameter 'pauseopt' is non-zero.
33 */
34int
35dialog_msgbox(const char *title, const char *cprompt, int height, int width,
36	      int pauseopt)
37{
38    /* *INDENT-OFF* */
39    static DLG_KEYS_BINDING binding[] = {
40	HELPKEY_BINDINGS,
41	ENTERKEY_BINDINGS,
42	SCROLLKEY_BINDINGS,
43	TRAVERSE_BINDINGS,
44	END_KEYS_BINDING
45    };
46    /* *INDENT-ON* */
47
48    int x, y, last = 0, page;
49    int button;
50    int key = 0, fkey;
51    int result = DLG_EXIT_UNKNOWN;
52    WINDOW *dialog = 0;
53    char *prompt;
54    const char **buttons = dlg_ok_label();
55    int offset = 0;
56    int check;
57    bool show = TRUE;
58    int min_width = (pauseopt == 1 ? 12 : 0);
59    bool save_nocancel = dialog_vars.nocancel;
60#ifdef KEY_RESIZE
61    int req_high;
62    int req_wide;
63#endif
64
65    DLG_TRACE(("# msgbox args:\n"));
66    DLG_TRACE2S("title", title);
67    DLG_TRACE2S("message", cprompt);
68    DLG_TRACE2N("height", height);
69    DLG_TRACE2N("width", width);
70    DLG_TRACE2N("pauseopt", pauseopt);
71
72    dialog_vars.nocancel = TRUE;
73    button = dlg_default_button();
74
75#ifdef KEY_RESIZE
76    req_high = height;
77    req_wide = width;
78  restart:
79#endif
80
81    dlg_button_layout(buttons, &min_width);
82
83    prompt = dlg_strclone(cprompt);
84    dlg_tab_correct_str(prompt);
85    dlg_auto_size(title, prompt, &height, &width,
86		  (pauseopt == 1 ? 2 : 0),
87		  min_width);
88    dlg_print_size(height, width);
89    dlg_ctl_size(height, width);
90
91    x = dlg_box_x_ordinate(width);
92    y = dlg_box_y_ordinate(height);
93
94#ifdef KEY_RESIZE
95    if (dialog != 0)
96	dlg_move_window(dialog, height, width, y, x);
97    else
98#endif
99    {
100	dialog = dlg_new_window(height, width, y, x);
101	dlg_register_window(dialog, "msgbox", binding);
102	dlg_register_buttons(dialog, "msgbox", buttons);
103    }
104    page = height - (1 + 3 * MARGIN);
105
106    dlg_mouse_setbase(x, y);
107
108    dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
109    dlg_draw_title(dialog, title);
110
111    dlg_attrset(dialog, dialog_attr);
112
113    if (pauseopt) {
114	dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
115	mouse_mkbutton(height - 2, width / 2 - 4, 6, '\n');
116	dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
117	dlg_draw_helpline(dialog, FALSE);
118
119	while (result == DLG_EXIT_UNKNOWN) {
120	    if (show) {
121		last = dlg_print_scrolled(dialog, prompt, offset,
122					  page, width, pauseopt);
123		dlg_trace_win(dialog);
124		show = FALSE;
125	    }
126	    key = dlg_mouse_wgetch(dialog, &fkey);
127	    if (dlg_result_key(key, fkey, &result))
128		break;
129
130	    if (!fkey && (check = dlg_char_to_button(key, buttons)) >= 0) {
131		result = dlg_ok_buttoncode(check);
132		break;
133	    }
134
135	    if (fkey) {
136		switch (key) {
137#ifdef KEY_RESIZE
138		case KEY_RESIZE:
139		    dlg_will_resize(dialog);
140		    dlg_clear();
141		    free(prompt);
142		    height = req_high;
143		    width = req_wide;
144		    show = TRUE;
145		    goto restart;
146#endif
147		case DLGK_FIELD_NEXT:
148		    button = dlg_next_button(buttons, button);
149		    if (button < 0)
150			button = 0;
151		    dlg_draw_buttons(dialog,
152				     height - 2, 0,
153				     buttons, button,
154				     FALSE, width);
155		    break;
156		case DLGK_FIELD_PREV:
157		    button = dlg_prev_button(buttons, button);
158		    if (button < 0)
159			button = 0;
160		    dlg_draw_buttons(dialog,
161				     height - 2, 0,
162				     buttons, button,
163				     FALSE, width);
164		    break;
165		case DLGK_ENTER:
166		    result = dlg_ok_buttoncode(button);
167		    break;
168		default:
169		    if (is_DLGK_MOUSE(key)) {
170			result = dlg_ok_buttoncode(key - M_EVENT);
171			if (result < 0)
172			    result = DLG_EXIT_OK;
173		    } else if (dlg_check_scrolled(key,
174						  last,
175						  page,
176						  &show,
177						  &offset) == 0) {
178		    } else {
179			beep();
180		    }
181		    break;
182		}
183	    } else {
184		beep();
185	    }
186	}
187    } else {
188	dlg_print_scrolled(dialog, prompt, offset, page, width, pauseopt);
189	dlg_draw_helpline(dialog, FALSE);
190	wrefresh(dialog);
191	dlg_trace_win(dialog);
192	result = DLG_EXIT_OK;
193    }
194
195    dlg_del_window(dialog);
196    dlg_mouse_free_regions();
197    free(prompt);
198
199    dialog_vars.nocancel = save_nocancel;
200
201    return result;
202}
203