1 /****************************************************************************
2 * Copyright 2018-2020,2021 Thomas E. Dickey *
3 * Copyright 2017 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29 /*
30 * $Id: popup_msg.c,v 1.11 2021/12/18 21:19:19 tom Exp $
31 *
32 * Show a multi-line message in a window which may extend beyond the screen.
33 *
34 * Thomas Dickey - 2017/4/15.
35 */
36
37 #include <test.priv.h>
38
39 #include <popup_msg.h>
40
41 #if HAVE_NEWPAD
42
43 static WINDOW *old_window;
44
45 static void
begin_popup(void)46 begin_popup(void)
47 {
48 doupdate();
49 old_window = dupwin(curscr);
50 }
51
52 static void
end_popup(void)53 end_popup(void)
54 {
55 touchwin(old_window);
56 wnoutrefresh(old_window);
57 doupdate();
58 delwin(old_window);
59 }
60
61 /*
62 * Display a temporary window, e.g., to display a help-message.
63 */
64 void
popup_msg(WINDOW * parent,const char * const * msg)65 popup_msg(WINDOW *parent, const char *const *msg)
66 {
67 int x0 = 4;
68 int y0 = 2;
69 int y1 = 0;
70 int y2 = 0;
71 int wide = getmaxx(parent) - ((x0 + 1) * 2);
72 int high = getmaxy(parent) - ((y0 + 1) * 2);
73 WINDOW *help;
74 WINDOW *data;
75 int n;
76 int width = 0;
77 int length;
78 int last_y;
79 int ch = ERR;
80
81 for (n = 0; msg[n] != 0; ++n) {
82 int check = (int) strlen(msg[n]);
83 if (width < check)
84 width = check;
85 }
86 length = n;
87
88 if ((help = newwin(high, wide, y0, x0)) == 0)
89 return;
90 if ((data = newpad(length + 1, width + 1)) == 0) {
91 delwin(help);
92 return;
93 }
94
95 begin_popup();
96
97 keypad(data, TRUE);
98
99 for (n = 0; n < length; ++n) {
100 waddstr(data, msg[n]);
101 if ((n + 1) < length) {
102 waddch(data, '\n');
103 }
104 }
105 y2 = getcury(data);
106 last_y = (y2 - (high - 3));
107
108 do {
109 switch (ch) {
110 case KEY_HOME:
111 y1 = 0;
112 break;
113 case KEY_END:
114 y1 = last_y;
115 break;
116 case KEY_PREVIOUS:
117 case KEY_PPAGE:
118 if (y1 > 0) {
119 y1 -= high / 2;
120 if (y1 < 0)
121 y1 = 0;
122 } else {
123 beep();
124 }
125 break;
126 case KEY_NEXT:
127 case KEY_NPAGE:
128 if (y1 < last_y) {
129 y1 += high / 2;
130 if (y1 > last_y)
131 y1 = last_y;
132 } else {
133 beep();
134 }
135 break;
136 case CTRL('P'):
137 case KEY_UP:
138 if (y1 > 0)
139 --y1;
140 else
141 beep();
142 break;
143 case CTRL('N'):
144 case KEY_DOWN:
145 if (y1 < last_y)
146 ++y1;
147 else
148 beep();
149 break;
150 default:
151 beep();
152 break;
153 case ERR:
154 break;
155 }
156 werase(help);
157 box(help, 0, 0);
158 wnoutrefresh(help);
159 pnoutrefresh(data, y1, 0, y0 + 1, x0 + 1, high, wide);
160 doupdate();
161 } while ((ch = wgetch(data)) != ERR && ch != QUIT && ch != ESCAPE);
162 werase(help);
163 wrefresh(help);
164 delwin(help);
165 delwin(data);
166
167 end_popup();
168 }
169
170 void
popup_msg2(WINDOW * parent,char ** msg)171 popup_msg2(WINDOW *parent, char **msg)
172 {
173 popup_msg(parent, (const char *const *) msg);
174 }
175
176 #else
177 void
popup_msg(WINDOW * parent,const char * const * msg)178 popup_msg(WINDOW *parent, const char *const *msg)
179 {
180 (void) parent;
181 (void) msg;
182 beep();
183 }
184 #endif
185