1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2021-2024 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 <curses.h>
29
30 #include "bsddialog.h"
31 #include "bsddialog_theme.h"
32 #include "lib_util.h"
33
34 struct scrolltext {
35 WINDOW *pad;
36 int ypad;
37 int xpad;
38 int ys;
39 int ye;
40 int xs;
41 int xe;
42 int hpad;
43 int wpad;
44 int margin; /* 2 with multicolumn char, 0 otherwise */
45 int printrows; /* d.h - BORDERS - HBUTTONS */
46 };
47
updateborders(struct dialog * d,struct scrolltext * st)48 static void updateborders(struct dialog *d, struct scrolltext *st)
49 {
50 chtype arrowch;
51 cchar_t borderch;
52
53 if (d->conf->no_lines)
54 setcchar(&borderch, L" ", 0, 0, NULL);
55 else if (d->conf->ascii_lines)
56 setcchar(&borderch, L"|", 0, 0, NULL);
57 else
58 borderch = *WACS_VLINE;
59
60 if (st->xpad > 0) {
61 arrowch = LARROW(d->conf) | t.dialog.arrowcolor;
62 mvwvline(d->widget, (d->h / 2) - 2, 0, arrowch, 4);
63 } else {
64 wattron(d->widget, t.dialog.lineraisecolor);
65 mvwvline_set(d->widget, (d->h / 2) - 2, 0, &borderch, 4);
66 wattroff(d->widget, t.dialog.lineraisecolor);
67 }
68
69 if (st->xpad + d->w - 2 - st->margin < st->wpad) {
70 arrowch = RARROW(d->conf) | t.dialog.arrowcolor;
71 mvwvline(d->widget, (d->h / 2) - 2, d->w - 1, arrowch, 4);
72 } else {
73 wattron(d->widget, t.dialog.linelowercolor);
74 mvwvline_set(d->widget, (d->h / 2) - 2, d->w - 1, &borderch, 4);
75 wattroff(d->widget, t.dialog.linelowercolor);
76 }
77
78 if (st->hpad > d->h - 4) {
79 wattron(d->widget, t.dialog.arrowcolor);
80 mvwprintw(d->widget, d->h - 3, d->w - 6,
81 "%3d%%", 100 * (st->ypad + d->h - 4) / st->hpad);
82 wattroff(d->widget, t.dialog.arrowcolor);
83 }
84 }
85
textbox_size_position(struct dialog * d,struct scrolltext * st)86 static int textbox_size_position(struct dialog *d, struct scrolltext *st)
87 {
88 int minw;
89
90 if (set_widget_size(d->conf, d->rows, d->cols, &d->h, &d->w) != 0)
91 return (BSDDIALOG_ERROR);
92 if (set_widget_autosize(d->conf, d->rows, d->cols, &d->h, &d->w,
93 d->text, NULL, &d->bs, st->hpad, st->wpad + st->margin) != 0)
94 return (BSDDIALOG_ERROR);
95 minw = (st->wpad > 0) ? 2 /*multicolumn char*/ + st->margin : 0 ;
96 if (widget_checksize(d->h, d->w, &d->bs, MIN(st->hpad, 1), minw) != 0)
97 return (BSDDIALOG_ERROR);
98 if (set_widget_position(d->conf, &d->y, &d->x, d->h, d->w) != 0)
99 return (BSDDIALOG_ERROR);
100
101 return (0);
102 }
103
textbox_draw(struct dialog * d,struct scrolltext * st)104 static int textbox_draw(struct dialog *d, struct scrolltext *st)
105 {
106 if (d->built) {
107 hide_dialog(d);
108 refresh(); /* Important for decreasing screen */
109 }
110 if (textbox_size_position(d, st) != 0)
111 return (BSDDIALOG_ERROR);
112 if (draw_dialog(d) != 0)
113 return (BSDDIALOG_ERROR);
114 if (d->built)
115 refresh(); /* Important to fix grey lines expanding screen */
116
117 st->ys = d->y + 1;
118 st->xs = (st->margin == 0) ? d->x + 1 : d->x + 2;
119 st->ye = st->ys + d->h - 5;
120 st->xe = st->xs + d->w - 3 - st->margin;
121 st->ypad = st->xpad = 0;
122 st->printrows = d->h-4;
123
124 return (0);
125 }
126
127 /* API */
128 int
bsddialog_textbox(struct bsddialog_conf * conf,const char * file,int rows,int cols)129 bsddialog_textbox(struct bsddialog_conf *conf, const char *file, int rows,
130 int cols)
131 {
132 bool loop, has_multicol_ch;
133 int i, retval;
134 unsigned int defaulttablen, linecols;
135 wint_t input;
136 char buf[BUFSIZ];
137 FILE *fp;
138 struct scrolltext st;
139 struct dialog d;
140
141 if (file == NULL)
142 RETURN_ERROR("*file is NULL");
143 if ((fp = fopen(file, "r")) == NULL)
144 RETURN_FMTERROR("Cannot open file \"%s\"", file);
145
146 if (prepare_dialog(conf, "" /* fake */, rows, cols, &d) != 0)
147 return (BSDDIALOG_ERROR);
148 set_buttons(&d, true, "EXIT", NULL);
149
150 defaulttablen = TABSIZE;
151 if (conf->text.tablen > 0)
152 set_tabsize(conf->text.tablen);
153 st.hpad = 1;
154 st.wpad = 1;
155 st.pad = newpad(st.hpad, st.wpad);
156 wbkgd(st.pad, t.dialog.color);
157 st.margin = 0;
158 i = 0;
159 while (fgets(buf, BUFSIZ, fp) != NULL) {
160 if (str_props(buf, &linecols, &has_multicol_ch) != 0)
161 continue;
162 if ((int)linecols > st.wpad) {
163 st.wpad = linecols;
164 wresize(st.pad, st.hpad, st.wpad);
165 }
166 if (i > st.hpad-1) {
167 st.hpad++;
168 wresize(st.pad, st.hpad, st.wpad);
169 }
170 mvwaddstr(st.pad, i, 0, buf);
171 i++;
172 if (has_multicol_ch)
173 st.margin = 2;
174 }
175 fclose(fp);
176 set_tabsize(defaulttablen); /* reset because it is curses global */
177
178 if (textbox_draw(&d, &st) != 0)
179 return (BSDDIALOG_ERROR);
180
181 loop = true;
182 while (loop) {
183 updateborders(&d, &st);
184 /*
185 * Trick, overflow multicolumn charchter right border:
186 * wnoutrefresh(widget);
187 * pnoutrefresh(pad, ypad, xpad, ys, xs, ye, xe);
188 * doupdate();
189 */
190 wrefresh(d.widget);
191 prefresh(st.pad, st.ypad, st.xpad, st.ys, st.xs, st.ye, st.xe);
192 if (get_wch(&input) == ERR)
193 continue;
194 if (shortcut_buttons(input, &d.bs)) {
195 DRAW_BUTTONS(d);
196 doupdate();
197 retval = BUTTONVALUE(d.bs);
198 break; /* loop */
199 }
200 switch(input) {
201 case KEY_ENTER:
202 case 10: /* Enter */
203 retval = BSDDIALOG_OK;
204 loop = false;
205 break;
206 case 27: /* Esc */
207 if (conf->key.enable_esc) {
208 retval = BSDDIALOG_ESC;
209 loop = false;
210 }
211 break;
212 case '\t': /* TAB */
213 d.bs.curr = (d.bs.curr + 1) % d.bs.nbuttons;
214 DRAW_BUTTONS(d);
215 break;
216 case KEY_HOME:
217 st.ypad = 0;
218 break;
219 case KEY_END:
220 st.ypad = MAX(st.hpad - st.printrows, 0);
221 break;
222 case KEY_PPAGE:
223 st.ypad = MAX(st.ypad - st.printrows, 0);
224 break;
225 case KEY_NPAGE:
226 st.ypad += st.printrows;
227 if (st.ypad + st.printrows > st.hpad)
228 st.ypad = st.hpad - st.printrows;
229 break;
230 case '0':
231 st.xpad = 0;
232 break;
233 case KEY_LEFT:
234 case 'h':
235 st.xpad = MAX(st.xpad - 1, 0);
236 break;
237 case KEY_RIGHT:
238 case 'l':
239 if (st.xpad + d.w - 2 - st.margin < st.wpad)
240 st.xpad++;
241 break;
242 case KEY_UP:
243 case 'k':
244 st.ypad = MAX(st.ypad - 1, 0);
245 break;
246 case KEY_DOWN:
247 case'j':
248 if (st.ypad + st.printrows <= st.hpad -1)
249 st.ypad++;
250 break;
251 case KEY_F(1):
252 if (conf->key.f1_file == NULL &&
253 conf->key.f1_message == NULL)
254 break;
255 if (f1help_dialog(conf) != 0)
256 return (BSDDIALOG_ERROR);
257 if (textbox_draw(&d, &st) != 0)
258 return (BSDDIALOG_ERROR);
259 break;
260 case KEY_CTRL('l'):
261 case KEY_RESIZE:
262 if (textbox_draw(&d, &st) != 0)
263 return (BSDDIALOG_ERROR);
264 break;
265 }
266 }
267
268 delwin(st.pad);
269 end_dialog(&d);
270
271 return (retval);
272 }
273