1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com>
4 *
5 * Derived from menuconfig.
6 */
7 #include "nconf.h"
8 #include "lkc.h"
9
10 int attr_normal;
11 int attr_main_heading;
12 int attr_main_menu_box;
13 int attr_main_menu_fore;
14 int attr_main_menu_back;
15 int attr_main_menu_grey;
16 int attr_main_menu_heading;
17 int attr_scrollwin_text;
18 int attr_scrollwin_heading;
19 int attr_scrollwin_box;
20 int attr_dialog_text;
21 int attr_dialog_menu_fore;
22 int attr_dialog_menu_back;
23 int attr_dialog_box;
24 int attr_input_box;
25 int attr_input_heading;
26 int attr_input_text;
27 int attr_input_field;
28 int attr_function_text;
29 int attr_function_highlight;
30
31 #define COLOR_ATTR(_at, _fg, _bg, _hl) \
32 { .attr = &(_at), .has_color = true, .color_fg = _fg, .color_bg = _bg, .highlight = _hl }
33 #define NO_COLOR_ATTR(_at, _hl) \
34 { .attr = &(_at), .has_color = false, .highlight = _hl }
35 #define COLOR_DEFAULT -1
36
37 struct nconf_attr_param {
38 int *attr;
39 bool has_color;
40 int color_fg;
41 int color_bg;
42 int highlight;
43 };
44
45 static const struct nconf_attr_param color_theme_params[] = {
46 COLOR_ATTR(attr_normal, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
47 COLOR_ATTR(attr_main_heading, COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD | A_UNDERLINE),
48 COLOR_ATTR(attr_main_menu_box, COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL),
49 COLOR_ATTR(attr_main_menu_fore, COLOR_DEFAULT, COLOR_DEFAULT, A_REVERSE),
50 COLOR_ATTR(attr_main_menu_back, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
51 COLOR_ATTR(attr_main_menu_grey, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
52 COLOR_ATTR(attr_main_menu_heading, COLOR_GREEN, COLOR_DEFAULT, A_BOLD),
53 COLOR_ATTR(attr_scrollwin_text, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
54 COLOR_ATTR(attr_scrollwin_heading, COLOR_GREEN, COLOR_DEFAULT, A_BOLD),
55 COLOR_ATTR(attr_scrollwin_box, COLOR_YELLOW, COLOR_DEFAULT, A_BOLD),
56 COLOR_ATTR(attr_dialog_text, COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD),
57 COLOR_ATTR(attr_dialog_menu_fore, COLOR_RED, COLOR_DEFAULT, A_STANDOUT),
58 COLOR_ATTR(attr_dialog_menu_back, COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL),
59 COLOR_ATTR(attr_dialog_box, COLOR_YELLOW, COLOR_DEFAULT, A_BOLD),
60 COLOR_ATTR(attr_input_box, COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL),
61 COLOR_ATTR(attr_input_heading, COLOR_GREEN, COLOR_DEFAULT, A_BOLD),
62 COLOR_ATTR(attr_input_text, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
63 COLOR_ATTR(attr_input_field, COLOR_DEFAULT, COLOR_DEFAULT, A_UNDERLINE),
64 COLOR_ATTR(attr_function_text, COLOR_YELLOW, COLOR_DEFAULT, A_REVERSE),
65 COLOR_ATTR(attr_function_highlight, COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD),
66 { /* sentinel */ }
67 };
68
69 static const struct nconf_attr_param no_color_theme_params[] = {
70 NO_COLOR_ATTR(attr_normal, A_NORMAL),
71 NO_COLOR_ATTR(attr_main_heading, A_BOLD | A_UNDERLINE),
72 NO_COLOR_ATTR(attr_main_menu_box, A_NORMAL),
73 NO_COLOR_ATTR(attr_main_menu_fore, A_STANDOUT),
74 NO_COLOR_ATTR(attr_main_menu_back, A_NORMAL),
75 NO_COLOR_ATTR(attr_main_menu_grey, A_NORMAL),
76 NO_COLOR_ATTR(attr_main_menu_heading, A_BOLD),
77 NO_COLOR_ATTR(attr_scrollwin_text, A_NORMAL),
78 NO_COLOR_ATTR(attr_scrollwin_heading, A_BOLD),
79 NO_COLOR_ATTR(attr_scrollwin_box, A_BOLD),
80 NO_COLOR_ATTR(attr_dialog_text, A_NORMAL),
81 NO_COLOR_ATTR(attr_dialog_menu_fore, A_STANDOUT),
82 NO_COLOR_ATTR(attr_dialog_menu_back, A_NORMAL),
83 NO_COLOR_ATTR(attr_dialog_box, A_BOLD),
84 NO_COLOR_ATTR(attr_input_box, A_BOLD),
85 NO_COLOR_ATTR(attr_input_heading, A_BOLD),
86 NO_COLOR_ATTR(attr_input_text, A_NORMAL),
87 NO_COLOR_ATTR(attr_input_field, A_UNDERLINE),
88 NO_COLOR_ATTR(attr_function_text, A_REVERSE),
89 NO_COLOR_ATTR(attr_function_highlight, A_BOLD),
90 { /* sentinel */ }
91 };
92
set_colors(void)93 void set_colors(void)
94 {
95 const struct nconf_attr_param *p;
96 int pair = 0;
97
98 if (has_colors()) {
99 start_color();
100 use_default_colors();
101 p = color_theme_params;
102 } else {
103 p = no_color_theme_params;
104 }
105
106 for (; p->attr; p++) {
107 int attr = p->highlight;
108
109 if (p->has_color) {
110 pair++;
111 init_pair(pair, p->color_fg, p->color_bg);
112 attr |= COLOR_PAIR(pair);
113 }
114
115 *p->attr = attr;
116 }
117 }
118
119 /* this changes the windows attributes !!! */
print_in_middle(WINDOW * win,int y,int width,const char * str,int attrs)120 void print_in_middle(WINDOW *win, int y, int width, const char *str, int attrs)
121 {
122 wattrset(win, attrs);
123 mvwprintw(win, y, (width - strlen(str)) / 2, "%s", str);
124 }
125
get_line_no(const char * text)126 int get_line_no(const char *text)
127 {
128 int i;
129 int total = 1;
130
131 if (!text)
132 return 0;
133
134 for (i = 0; text[i] != '\0'; i++)
135 if (text[i] == '\n')
136 total++;
137 return total;
138 }
139
get_line(const char * text,int line_no)140 const char *get_line(const char *text, int line_no)
141 {
142 int i;
143 int lines = 0;
144
145 if (!text)
146 return NULL;
147
148 for (i = 0; text[i] != '\0' && lines < line_no; i++)
149 if (text[i] == '\n')
150 lines++;
151 return text+i;
152 }
153
get_line_length(const char * line)154 int get_line_length(const char *line)
155 {
156 int res = 0;
157 while (*line != '\0' && *line != '\n') {
158 line++;
159 res++;
160 }
161 return res;
162 }
163
164 /* print all lines to the window. */
fill_window(WINDOW * win,const char * text)165 void fill_window(WINDOW *win, const char *text)
166 {
167 int x, y;
168 int total_lines = get_line_no(text);
169 int i;
170
171 getmaxyx(win, y, x);
172 /* do not go over end of line */
173 total_lines = min(total_lines, y);
174 for (i = 0; i < total_lines; i++) {
175 char tmp[x+10];
176 const char *line = get_line(text, i);
177 int len = get_line_length(line);
178 strncpy(tmp, line, min(len, x));
179 tmp[len] = '\0';
180 mvwprintw(win, i, 0, "%s", tmp);
181 }
182 }
183
184 /* get the message, and buttons.
185 * each button must be a char*
186 * return the selected button
187 *
188 * this dialog is used for 2 different things:
189 * 1) show a text box, no buttons.
190 * 2) show a dialog, with horizontal buttons
191 */
btn_dialog(WINDOW * main_window,const char * msg,int btn_num,...)192 int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...)
193 {
194 va_list ap;
195 char *btn;
196 int btns_width = 0;
197 int msg_lines = 0;
198 int msg_width = 0;
199 int total_width;
200 int win_rows = 0;
201 WINDOW *win;
202 WINDOW *msg_win;
203 WINDOW *menu_win;
204 MENU *menu;
205 ITEM *btns[btn_num+1];
206 int i, x, y;
207 int res = -1;
208
209
210 va_start(ap, btn_num);
211 for (i = 0; i < btn_num; i++) {
212 btn = va_arg(ap, char *);
213 btns[i] = new_item(btn, "");
214 btns_width += strlen(btn)+1;
215 }
216 va_end(ap);
217 btns[btn_num] = NULL;
218
219 /* find the widest line of msg: */
220 msg_lines = get_line_no(msg);
221 for (i = 0; i < msg_lines; i++) {
222 const char *line = get_line(msg, i);
223 int len = get_line_length(line);
224 if (msg_width < len)
225 msg_width = len;
226 }
227
228 total_width = max(msg_width, btns_width);
229 /* place dialog in middle of screen */
230 y = (getmaxy(stdscr)-(msg_lines+4))/2;
231 x = (getmaxx(stdscr)-(total_width+4))/2;
232
233
234 /* create the windows */
235 if (btn_num > 0)
236 win_rows = msg_lines+4;
237 else
238 win_rows = msg_lines+2;
239
240 win = newwin(win_rows, total_width+4, y, x);
241 keypad(win, TRUE);
242 menu_win = derwin(win, 1, btns_width, win_rows-2,
243 1+(total_width+2-btns_width)/2);
244 menu = new_menu(btns);
245 msg_win = derwin(win, win_rows-2, msg_width, 1,
246 1+(total_width+2-msg_width)/2);
247
248 set_menu_fore(menu, attr_dialog_menu_fore);
249 set_menu_back(menu, attr_dialog_menu_back);
250
251 wattrset(win, attr_dialog_box);
252 box(win, 0, 0);
253
254 /* print message */
255 wattrset(msg_win, attr_dialog_text);
256 fill_window(msg_win, msg);
257
258 set_menu_win(menu, win);
259 set_menu_sub(menu, menu_win);
260 set_menu_format(menu, 1, btn_num);
261 menu_opts_off(menu, O_SHOWDESC);
262 menu_opts_off(menu, O_SHOWMATCH);
263 menu_opts_on(menu, O_ONEVALUE);
264 menu_opts_on(menu, O_NONCYCLIC);
265 set_menu_mark(menu, "");
266 post_menu(menu);
267
268
269 touchwin(win);
270 refresh_all_windows(main_window);
271 while ((res = wgetch(win))) {
272 switch (res) {
273 case KEY_LEFT:
274 menu_driver(menu, REQ_LEFT_ITEM);
275 break;
276 case KEY_RIGHT:
277 menu_driver(menu, REQ_RIGHT_ITEM);
278 break;
279 case 10: /* ENTER */
280 case 27: /* ESCAPE */
281 case ' ':
282 case KEY_F(F_BACK):
283 case KEY_F(F_EXIT):
284 break;
285 }
286 touchwin(win);
287 refresh_all_windows(main_window);
288
289 if (res == 10 || res == ' ') {
290 res = item_index(current_item(menu));
291 break;
292 } else if (res == 27 || res == KEY_F(F_BACK) ||
293 res == KEY_F(F_EXIT)) {
294 res = KEY_EXIT;
295 break;
296 }
297 }
298
299 unpost_menu(menu);
300 free_menu(menu);
301 for (i = 0; i < btn_num; i++)
302 free_item(btns[i]);
303
304 delwin(win);
305 return res;
306 }
307
dialog_inputbox(WINDOW * main_window,const char * title,const char * prompt,const char * init,char ** resultp,int * result_len)308 int dialog_inputbox(WINDOW *main_window,
309 const char *title, const char *prompt,
310 const char *init, char **resultp, int *result_len)
311 {
312 int prompt_lines = 0;
313 int prompt_width = 0;
314 WINDOW *win;
315 WINDOW *prompt_win;
316 WINDOW *form_win;
317 PANEL *panel;
318 int i, x, y, lines, columns, win_lines, win_cols;
319 int res = -1;
320 int cursor_position = strlen(init);
321 int cursor_form_win;
322 char *result = *resultp;
323
324 getmaxyx(stdscr, lines, columns);
325
326 if (strlen(init)+1 > *result_len) {
327 *result_len = strlen(init)+1;
328 *resultp = result = xrealloc(result, *result_len);
329 }
330
331 /* find the widest line of msg: */
332 prompt_lines = get_line_no(prompt);
333 for (i = 0; i < prompt_lines; i++) {
334 const char *line = get_line(prompt, i);
335 int len = get_line_length(line);
336 prompt_width = max(prompt_width, len);
337 }
338
339 if (title)
340 prompt_width = max(prompt_width, strlen(title));
341
342 win_lines = min(prompt_lines+6, lines-2);
343 win_cols = min(prompt_width+7, columns-2);
344 prompt_lines = max(win_lines-6, 0);
345 prompt_width = max(win_cols-7, 0);
346
347 /* place dialog in middle of screen */
348 y = (lines-win_lines)/2;
349 x = (columns-win_cols)/2;
350
351 strncpy(result, init, *result_len);
352
353 /* create the windows */
354 win = newwin(win_lines, win_cols, y, x);
355 prompt_win = derwin(win, prompt_lines+1, prompt_width, 2, 2);
356 form_win = derwin(win, 1, prompt_width, prompt_lines+3, 2);
357 keypad(form_win, TRUE);
358
359 wattrset(form_win, attr_input_field);
360
361 wattrset(win, attr_input_box);
362 box(win, 0, 0);
363 wattrset(win, attr_input_heading);
364 if (title)
365 mvwprintw(win, 0, 3, "%s", title);
366
367 /* print message */
368 wattrset(prompt_win, attr_input_text);
369 fill_window(prompt_win, prompt);
370
371 mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
372 cursor_form_win = min(cursor_position, prompt_width-1);
373 mvwprintw(form_win, 0, 0, "%s",
374 result + cursor_position-cursor_form_win);
375
376 /* create panels */
377 panel = new_panel(win);
378
379 /* show the cursor */
380 curs_set(1);
381
382 touchwin(win);
383 refresh_all_windows(main_window);
384 while ((res = wgetch(form_win))) {
385 int len = strlen(result);
386 switch (res) {
387 case 10: /* ENTER */
388 case 27: /* ESCAPE */
389 case KEY_F(F_HELP):
390 case KEY_F(F_EXIT):
391 case KEY_F(F_BACK):
392 break;
393 case 8: /* ^H */
394 case 127: /* ^? */
395 case KEY_BACKSPACE:
396 if (cursor_position > 0) {
397 memmove(&result[cursor_position-1],
398 &result[cursor_position],
399 len-cursor_position+1);
400 cursor_position--;
401 cursor_form_win--;
402 len--;
403 }
404 break;
405 case KEY_DC:
406 if (cursor_position >= 0 && cursor_position < len) {
407 memmove(&result[cursor_position],
408 &result[cursor_position+1],
409 len-cursor_position+1);
410 len--;
411 }
412 break;
413 case KEY_UP:
414 case KEY_RIGHT:
415 if (cursor_position < len) {
416 cursor_position++;
417 cursor_form_win++;
418 }
419 break;
420 case KEY_DOWN:
421 case KEY_LEFT:
422 if (cursor_position > 0) {
423 cursor_position--;
424 cursor_form_win--;
425 }
426 break;
427 case KEY_HOME:
428 cursor_position = 0;
429 cursor_form_win = 0;
430 break;
431 case KEY_END:
432 cursor_position = len;
433 cursor_form_win = min(cursor_position, prompt_width-1);
434 break;
435 default:
436 if ((isgraph(res) || isspace(res))) {
437 /* one for new char, one for '\0' */
438 if (len+2 > *result_len) {
439 *result_len = len+2;
440 *resultp = result = realloc(result,
441 *result_len);
442 }
443 /* insert the char at the proper position */
444 memmove(&result[cursor_position+1],
445 &result[cursor_position],
446 len-cursor_position+1);
447 result[cursor_position] = res;
448 cursor_position++;
449 cursor_form_win++;
450 len++;
451 } else {
452 mvprintw(0, 0, "unknown key: %d\n", res);
453 }
454 break;
455 }
456 if (cursor_form_win < 0)
457 cursor_form_win = 0;
458 else if (cursor_form_win > prompt_width-1)
459 cursor_form_win = prompt_width-1;
460
461 wmove(form_win, 0, 0);
462 wclrtoeol(form_win);
463 mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
464 mvwprintw(form_win, 0, 0, "%s",
465 result + cursor_position-cursor_form_win);
466 wmove(form_win, 0, cursor_form_win);
467 touchwin(win);
468 refresh_all_windows(main_window);
469
470 if (res == 10) {
471 res = 0;
472 break;
473 } else if (res == 27 || res == KEY_F(F_BACK) ||
474 res == KEY_F(F_EXIT)) {
475 res = KEY_EXIT;
476 break;
477 } else if (res == KEY_F(F_HELP)) {
478 res = 1;
479 break;
480 }
481 }
482
483 /* hide the cursor */
484 curs_set(0);
485 del_panel(panel);
486 delwin(prompt_win);
487 delwin(form_win);
488 delwin(win);
489 return res;
490 }
491
492 /* refresh all windows in the correct order */
refresh_all_windows(WINDOW * main_window)493 void refresh_all_windows(WINDOW *main_window)
494 {
495 update_panels();
496 touchwin(main_window);
497 refresh();
498 }
499
show_scroll_win(WINDOW * main_window,const char * title,const char * text)500 void show_scroll_win(WINDOW *main_window,
501 const char *title,
502 const char *text)
503 {
504 (void)show_scroll_win_ext(main_window, title, (char *)text, NULL, NULL, NULL, NULL);
505 }
506
507 /* layman's scrollable window... */
show_scroll_win_ext(WINDOW * main_window,const char * title,char * text,int * vscroll,int * hscroll,extra_key_cb_fn extra_key_cb,void * data)508 int show_scroll_win_ext(WINDOW *main_window, const char *title, char *text,
509 int *vscroll, int *hscroll,
510 extra_key_cb_fn extra_key_cb, void *data)
511 {
512 int res;
513 int total_lines = get_line_no(text);
514 int x, y, lines, columns;
515 int start_x = 0, start_y = 0;
516 int text_lines = 0, text_cols = 0;
517 int total_cols = 0;
518 int win_cols = 0;
519 int win_lines = 0;
520 int i = 0;
521 WINDOW *win;
522 WINDOW *pad;
523 PANEL *panel;
524 bool done = false;
525
526 if (hscroll)
527 start_x = *hscroll;
528 if (vscroll)
529 start_y = *vscroll;
530
531 getmaxyx(stdscr, lines, columns);
532
533 /* find the widest line of msg: */
534 total_lines = get_line_no(text);
535 for (i = 0; i < total_lines; i++) {
536 const char *line = get_line(text, i);
537 int len = get_line_length(line);
538 total_cols = max(total_cols, len+2);
539 }
540
541 /* create the pad */
542 pad = newpad(total_lines+10, total_cols+10);
543 wattrset(pad, attr_scrollwin_text);
544 fill_window(pad, text);
545
546 win_lines = min(total_lines+4, lines-2);
547 win_cols = min(total_cols+2, columns-2);
548 text_lines = max(win_lines-4, 0);
549 text_cols = max(win_cols-2, 0);
550
551 /* place window in middle of screen */
552 y = (lines-win_lines)/2;
553 x = (columns-win_cols)/2;
554
555 win = newwin(win_lines, win_cols, y, x);
556 keypad(win, TRUE);
557 /* show the help in the help window, and show the help panel */
558 wattrset(win, attr_scrollwin_box);
559 box(win, 0, 0);
560 wattrset(win, attr_scrollwin_heading);
561 mvwprintw(win, 0, 3, " %s ", title);
562 panel = new_panel(win);
563
564 /* handle scrolling */
565 while (!done) {
566 copywin(pad, win, start_y, start_x, 2, 2, text_lines,
567 text_cols, 0);
568 print_in_middle(win,
569 text_lines+2,
570 text_cols,
571 "<OK>",
572 attr_dialog_menu_fore);
573 wrefresh(win);
574
575 res = wgetch(win);
576 switch (res) {
577 case KEY_NPAGE:
578 case ' ':
579 case 'd':
580 start_y += text_lines-2;
581 break;
582 case KEY_PPAGE:
583 case 'u':
584 start_y -= text_lines+2;
585 break;
586 case KEY_HOME:
587 start_y = 0;
588 break;
589 case KEY_END:
590 start_y = total_lines-text_lines;
591 break;
592 case KEY_DOWN:
593 case 'j':
594 start_y++;
595 break;
596 case KEY_UP:
597 case 'k':
598 start_y--;
599 break;
600 case KEY_LEFT:
601 case 'h':
602 start_x--;
603 break;
604 case KEY_RIGHT:
605 case 'l':
606 start_x++;
607 break;
608 default:
609 if (extra_key_cb) {
610 size_t start = (get_line(text, start_y) - text);
611 size_t end = (get_line(text, start_y + text_lines) - text);
612
613 if (extra_key_cb(res, start, end, data)) {
614 done = true;
615 break;
616 }
617 }
618 }
619 if (res == 0 || res == 10 || res == 27 || res == 'q' ||
620 res == KEY_F(F_HELP) || res == KEY_F(F_BACK) ||
621 res == KEY_F(F_EXIT))
622 break;
623 if (start_y < 0)
624 start_y = 0;
625 if (start_y >= total_lines-text_lines)
626 start_y = total_lines-text_lines;
627 if (start_x < 0)
628 start_x = 0;
629 if (start_x >= total_cols-text_cols)
630 start_x = total_cols-text_cols;
631 }
632
633 if (hscroll)
634 *hscroll = start_x;
635 if (vscroll)
636 *vscroll = start_y;
637 del_panel(panel);
638 delwin(win);
639 refresh_all_windows(main_window);
640 return res;
641 }
642