1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2021-2022 Alfonso Sabato Siciliano
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29
30 #include <curses.h>
31 #include <string.h>
32
33 #include "bsddialog.h"
34 #include "bsddialog_theme.h"
35 #include "lib_util.h"
36
37 static int
message_autosize(struct bsddialog_conf * conf,int rows,int cols,int * h,int * w,const char * text,bool * hastext,struct buttons bs)38 message_autosize(struct bsddialog_conf *conf, int rows, int cols, int *h,
39 int *w, const char *text, bool *hastext, struct buttons bs)
40 {
41 int htext, wtext;
42
43 if (cols == BSDDIALOG_AUTOSIZE || rows == BSDDIALOG_AUTOSIZE ||
44 hastext != NULL) {
45 if (text_size(conf, rows, cols, text, &bs, 0, 1, &htext,
46 &wtext) != 0)
47 return (BSDDIALOG_ERROR);
48 if (hastext != NULL)
49 *hastext = htext > 0 ? true : false;
50 }
51
52 if (cols == BSDDIALOG_AUTOSIZE)
53 *w = widget_min_width(conf, wtext, 0, &bs);
54
55 if (rows == BSDDIALOG_AUTOSIZE)
56 *h = widget_min_height(conf, htext, 0, true);
57
58 return (0);
59 }
60
61 static int
message_checksize(int rows,int cols,bool hastext,struct buttons bs)62 message_checksize(int rows, int cols, bool hastext, struct buttons bs)
63 {
64 int mincols;
65
66 mincols = VBORDERS;
67 mincols += buttons_min_width(bs);
68
69 if (cols < mincols)
70 RETURN_ERROR("Few cols, Msgbox and Yesno need at least width "
71 "for borders, buttons and spaces between buttons");
72
73 if (rows < HBORDERS + 2 /* buttons */)
74 RETURN_ERROR("Msgbox and Yesno need at least 4 rows");
75 if (hastext && rows < HBORDERS + 2 /*buttons*/ + 1 /* text row */)
76 RETURN_ERROR("Msgbox and Yesno with text need at least 5 rows");
77
78 return (0);
79 }
80
81 static void
textupdate(WINDOW * widget,WINDOW * textpad,int htextpad,int ytextpad,bool hastext)82 textupdate(WINDOW *widget, WINDOW *textpad, int htextpad, int ytextpad,
83 bool hastext)
84 {
85 int y, x, h, w;
86
87 getbegyx(widget, y, x);
88 getmaxyx(widget, h, w);
89
90 if (hastext && htextpad > h - 4) {
91 wattron(widget, t.dialog.arrowcolor);
92 mvwprintw(widget, h-3, w-6, "%3d%%",
93 100 * (ytextpad+h-4)/ htextpad);
94 wattroff(widget, t.dialog.arrowcolor);
95 wnoutrefresh(widget);
96 }
97
98 pnoutrefresh(textpad, ytextpad, 0, y+1, x+2, y+h-4, x+w-2);
99 }
100
101 static int
do_message(struct bsddialog_conf * conf,const char * text,int rows,int cols,struct buttons bs)102 do_message(struct bsddialog_conf *conf, const char *text, int rows, int cols,
103 struct buttons bs)
104 {
105 bool hastext, loop;
106 int y, x, h, w, retval, ytextpad, htextpad, printrows, unused;
107 WINDOW *widget, *textpad, *shadow;
108 wint_t input;
109
110 if (set_widget_size(conf, rows, cols, &h, &w) != 0)
111 return (BSDDIALOG_ERROR);
112 if (message_autosize(conf, rows, cols, &h, &w, text, &hastext, bs) != 0)
113 return (BSDDIALOG_ERROR);
114 if (message_checksize(h, w, hastext, bs) != 0)
115 return (BSDDIALOG_ERROR);
116 if (set_widget_position(conf, &y, &x, h, w) != 0)
117 return (BSDDIALOG_ERROR);
118
119 if (new_dialog(conf, &shadow, &widget, y, x, h, w, &textpad, text, &bs,
120 true) != 0)
121 return (BSDDIALOG_ERROR);
122
123 printrows = h - 4;
124 ytextpad = 0;
125 getmaxyx(textpad, htextpad, unused);
126 unused++; /* fix unused error */
127 loop = true;
128 while (loop) {
129 textupdate(widget, textpad, htextpad, ytextpad, hastext);
130 doupdate();
131 if (get_wch(&input) == ERR)
132 continue;
133 switch (input) {
134 case KEY_ENTER:
135 case 10: /* Enter */
136 retval = bs.value[bs.curr];
137 loop = false;
138 break;
139 case 27: /* Esc */
140 if (conf->key.enable_esc) {
141 retval = BSDDIALOG_ESC;
142 loop = false;
143 }
144 break;
145 case '\t': /* TAB */
146 bs.curr = (bs.curr + 1) % bs.nbuttons;
147 draw_buttons(widget, bs, true);
148 wnoutrefresh(widget);
149 break;
150 case KEY_LEFT:
151 if (bs.curr > 0) {
152 bs.curr--;
153 draw_buttons(widget, bs, true);
154 wnoutrefresh(widget);
155 }
156 break;
157 case KEY_RIGHT:
158 if (bs.curr < (int)bs.nbuttons - 1) {
159 bs.curr++;
160 draw_buttons(widget, bs, true);
161 wnoutrefresh(widget);
162 }
163 break;
164 case KEY_UP:
165 if (ytextpad > 0)
166 ytextpad--;
167 break;
168 case KEY_DOWN:
169 if (ytextpad + printrows < htextpad)
170 ytextpad++;
171 break;
172 case KEY_HOME:
173 ytextpad = 0;
174 break;
175 case KEY_END:
176 ytextpad = htextpad - printrows;
177 ytextpad = ytextpad < 0 ? 0 : ytextpad;
178 break;
179 case KEY_PPAGE:
180 ytextpad -= printrows;
181 ytextpad = ytextpad < 0 ? 0 : ytextpad;
182 break;
183 case KEY_NPAGE:
184 ytextpad += printrows;
185 if (ytextpad + printrows > htextpad)
186 ytextpad = htextpad - printrows;
187 break;
188 case KEY_F(1):
189 if (conf->key.f1_file == NULL &&
190 conf->key.f1_message == NULL)
191 break;
192 if (f1help(conf) != 0)
193 return (BSDDIALOG_ERROR);
194 /* No break, screen size can change */
195 case KEY_RESIZE:
196 /* Important for decreasing screen */
197 hide_widget(y, x, h, w, conf->shadow);
198 refresh();
199
200 if (set_widget_size(conf, rows, cols, &h, &w) != 0)
201 return (BSDDIALOG_ERROR);
202 if (message_autosize(conf, rows, cols, &h, &w, text,
203 NULL, bs) != 0)
204 return (BSDDIALOG_ERROR);
205 if (message_checksize(h, w, hastext, bs) != 0)
206 return (BSDDIALOG_ERROR);
207 if (set_widget_position(conf, &y, &x, h, w) != 0)
208 return (BSDDIALOG_ERROR);
209
210 if (update_dialog(conf, shadow, widget, y, x, h, w,
211 textpad, text, &bs, true) != 0)
212 return (BSDDIALOG_ERROR);
213
214 printrows = h - 4;
215 getmaxyx(textpad, htextpad, unused);
216 ytextpad = 0;
217 textupdate(widget, textpad, htextpad, ytextpad, hastext);
218
219 /* Important to fix grey lines expanding screen */
220 refresh();
221 break;
222 default:
223 if (shortcut_buttons(input, &bs)) {
224 retval = bs.value[bs.curr];
225 loop = false;
226 }
227 }
228 }
229
230 end_dialog(conf, shadow, widget, textpad);
231
232 return (retval);
233 }
234
235 /* API */
236 int
bsddialog_msgbox(struct bsddialog_conf * conf,const char * text,int rows,int cols)237 bsddialog_msgbox(struct bsddialog_conf *conf, const char *text, int rows,
238 int cols)
239 {
240 struct buttons bs;
241
242 get_buttons(conf, &bs, BUTTON_OK_LABEL, NULL);
243
244 return (do_message(conf, text, rows, cols, bs));
245 }
246
247 int
bsddialog_yesno(struct bsddialog_conf * conf,const char * text,int rows,int cols)248 bsddialog_yesno(struct bsddialog_conf *conf, const char *text, int rows,
249 int cols)
250 {
251 struct buttons bs;
252
253 get_buttons(conf, &bs, "Yes", "No");
254
255 return (do_message(conf, text, rows, cols, bs));
256 }