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1 /*
2  * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com?
3  * Released under the terms of the GNU GPL v2.0.
4  *
5  * Derived from menuconfig.
6  *
7  */
8 #include "nconf.h"
9 
10 /* a list of all the different widgets we use */
11 attributes_t attributes[ATTR_MAX+1] = {0};
12 
13 /* available colors:
14    COLOR_BLACK   0
15    COLOR_RED     1
16    COLOR_GREEN   2
17    COLOR_YELLOW  3
18    COLOR_BLUE    4
19    COLOR_MAGENTA 5
20    COLOR_CYAN    6
21    COLOR_WHITE   7
22    */
set_normal_colors(void)23 static void set_normal_colors(void)
24 {
25 	init_pair(NORMAL, -1, -1);
26 	init_pair(MAIN_HEADING, COLOR_MAGENTA, -1);
27 
28 	/* FORE is for the selected item */
29 	init_pair(MAIN_MENU_FORE, -1, -1);
30 	/* BACK for all the rest */
31 	init_pair(MAIN_MENU_BACK, -1, -1);
32 	init_pair(MAIN_MENU_GREY, -1, -1);
33 	init_pair(MAIN_MENU_HEADING, COLOR_GREEN, -1);
34 	init_pair(MAIN_MENU_BOX, COLOR_YELLOW, -1);
35 
36 	init_pair(SCROLLWIN_TEXT, -1, -1);
37 	init_pair(SCROLLWIN_HEADING, COLOR_GREEN, -1);
38 	init_pair(SCROLLWIN_BOX, COLOR_YELLOW, -1);
39 
40 	init_pair(DIALOG_TEXT, -1, -1);
41 	init_pair(DIALOG_BOX, COLOR_YELLOW, -1);
42 	init_pair(DIALOG_MENU_BACK, COLOR_YELLOW, -1);
43 	init_pair(DIALOG_MENU_FORE, COLOR_RED, -1);
44 
45 	init_pair(INPUT_BOX, COLOR_YELLOW, -1);
46 	init_pair(INPUT_HEADING, COLOR_GREEN, -1);
47 	init_pair(INPUT_TEXT, -1, -1);
48 	init_pair(INPUT_FIELD, -1, -1);
49 
50 	init_pair(FUNCTION_HIGHLIGHT, -1, -1);
51 	init_pair(FUNCTION_TEXT, COLOR_YELLOW, -1);
52 }
53 
54 /* available attributes:
55    A_NORMAL        Normal display (no highlight)
56    A_STANDOUT      Best highlighting mode of the terminal.
57    A_UNDERLINE     Underlining
58    A_REVERSE       Reverse video
59    A_BLINK         Blinking
60    A_DIM           Half bright
61    A_BOLD          Extra bright or bold
62    A_PROTECT       Protected mode
63    A_INVIS         Invisible or blank mode
64    A_ALTCHARSET    Alternate character set
65    A_CHARTEXT      Bit-mask to extract a character
66    COLOR_PAIR(n)   Color-pair number n
67    */
normal_color_theme(void)68 static void normal_color_theme(void)
69 {
70 	/* automatically add color... */
71 #define mkattr(name, attr) do { \
72 attributes[name] = attr | COLOR_PAIR(name); } while (0)
73 	mkattr(NORMAL, NORMAL);
74 	mkattr(MAIN_HEADING, A_BOLD | A_UNDERLINE);
75 
76 	mkattr(MAIN_MENU_FORE, A_REVERSE);
77 	mkattr(MAIN_MENU_BACK, A_NORMAL);
78 	mkattr(MAIN_MENU_GREY, A_NORMAL);
79 	mkattr(MAIN_MENU_HEADING, A_BOLD);
80 	mkattr(MAIN_MENU_BOX, A_NORMAL);
81 
82 	mkattr(SCROLLWIN_TEXT, A_NORMAL);
83 	mkattr(SCROLLWIN_HEADING, A_BOLD);
84 	mkattr(SCROLLWIN_BOX, A_BOLD);
85 
86 	mkattr(DIALOG_TEXT, A_BOLD);
87 	mkattr(DIALOG_BOX, A_BOLD);
88 	mkattr(DIALOG_MENU_FORE, A_STANDOUT);
89 	mkattr(DIALOG_MENU_BACK, A_NORMAL);
90 
91 	mkattr(INPUT_BOX, A_NORMAL);
92 	mkattr(INPUT_HEADING, A_BOLD);
93 	mkattr(INPUT_TEXT, A_NORMAL);
94 	mkattr(INPUT_FIELD, A_UNDERLINE);
95 
96 	mkattr(FUNCTION_HIGHLIGHT, A_BOLD);
97 	mkattr(FUNCTION_TEXT, A_REVERSE);
98 }
99 
no_colors_theme(void)100 static void no_colors_theme(void)
101 {
102 	/* automatically add highlight, no color */
103 #define mkattrn(name, attr) { attributes[name] = attr; }
104 
105 	mkattrn(NORMAL, NORMAL);
106 	mkattrn(MAIN_HEADING, A_BOLD | A_UNDERLINE);
107 
108 	mkattrn(MAIN_MENU_FORE, A_STANDOUT);
109 	mkattrn(MAIN_MENU_BACK, A_NORMAL);
110 	mkattrn(MAIN_MENU_GREY, A_NORMAL);
111 	mkattrn(MAIN_MENU_HEADING, A_BOLD);
112 	mkattrn(MAIN_MENU_BOX, A_NORMAL);
113 
114 	mkattrn(SCROLLWIN_TEXT, A_NORMAL);
115 	mkattrn(SCROLLWIN_HEADING, A_BOLD);
116 	mkattrn(SCROLLWIN_BOX, A_BOLD);
117 
118 	mkattrn(DIALOG_TEXT, A_NORMAL);
119 	mkattrn(DIALOG_BOX, A_BOLD);
120 	mkattrn(DIALOG_MENU_FORE, A_STANDOUT);
121 	mkattrn(DIALOG_MENU_BACK, A_NORMAL);
122 
123 	mkattrn(INPUT_BOX, A_BOLD);
124 	mkattrn(INPUT_HEADING, A_BOLD);
125 	mkattrn(INPUT_TEXT, A_NORMAL);
126 	mkattrn(INPUT_FIELD, A_UNDERLINE);
127 
128 	mkattrn(FUNCTION_HIGHLIGHT, A_BOLD);
129 	mkattrn(FUNCTION_TEXT, A_REVERSE);
130 }
131 
set_colors()132 void set_colors()
133 {
134 	start_color();
135 	use_default_colors();
136 	set_normal_colors();
137 	if (has_colors()) {
138 		normal_color_theme();
139 	} else {
140 		/* give defaults */
141 		no_colors_theme();
142 	}
143 }
144 
145 
146 /* this changes the windows attributes !!! */
print_in_middle(WINDOW * win,int starty,int startx,int width,const char * string,chtype color)147 void print_in_middle(WINDOW *win,
148 		int starty,
149 		int startx,
150 		int width,
151 		const char *string,
152 		chtype color)
153 {      int length, x, y;
154 	float temp;
155 
156 
157 	if (win == NULL)
158 		win = stdscr;
159 	getyx(win, y, x);
160 	if (startx != 0)
161 		x = startx;
162 	if (starty != 0)
163 		y = starty;
164 	if (width == 0)
165 		width = 80;
166 
167 	length = strlen(string);
168 	temp = (width - length) / 2;
169 	x = startx + (int)temp;
170 	(void) wattrset(win, color);
171 	mvwprintw(win, y, x, "%s", string);
172 	refresh();
173 }
174 
get_line_no(const char * text)175 int get_line_no(const char *text)
176 {
177 	int i;
178 	int total = 1;
179 
180 	if (!text)
181 		return 0;
182 
183 	for (i = 0; text[i] != '\0'; i++)
184 		if (text[i] == '\n')
185 			total++;
186 	return total;
187 }
188 
get_line(const char * text,int line_no)189 const char *get_line(const char *text, int line_no)
190 {
191 	int i;
192 	int lines = 0;
193 
194 	if (!text)
195 		return 0;
196 
197 	for (i = 0; text[i] != '\0' && lines < line_no; i++)
198 		if (text[i] == '\n')
199 			lines++;
200 	return text+i;
201 }
202 
get_line_length(const char * line)203 int get_line_length(const char *line)
204 {
205 	int res = 0;
206 	while (*line != '\0' && *line != '\n') {
207 		line++;
208 		res++;
209 	}
210 	return res;
211 }
212 
213 /* print all lines to the window. */
fill_window(WINDOW * win,const char * text)214 void fill_window(WINDOW *win, const char *text)
215 {
216 	int x, y;
217 	int total_lines = get_line_no(text);
218 	int i;
219 
220 	getmaxyx(win, y, x);
221 	/* do not go over end of line */
222 	total_lines = min(total_lines, y);
223 	for (i = 0; i < total_lines; i++) {
224 		char tmp[x+10];
225 		const char *line = get_line(text, i);
226 		int len = get_line_length(line);
227 		strncpy(tmp, line, min(len, x));
228 		tmp[len] = '\0';
229 		mvwprintw(win, i, 0, "%s", tmp);
230 	}
231 }
232 
233 /* get the message, and buttons.
234  * each button must be a char*
235  * return the selected button
236  *
237  * this dialog is used for 2 different things:
238  * 1) show a text box, no buttons.
239  * 2) show a dialog, with horizontal buttons
240  */
btn_dialog(WINDOW * main_window,const char * msg,int btn_num,...)241 int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...)
242 {
243 	va_list ap;
244 	char *btn;
245 	int btns_width = 0;
246 	int msg_lines = 0;
247 	int msg_width = 0;
248 	int total_width;
249 	int win_rows = 0;
250 	WINDOW *win;
251 	WINDOW *msg_win;
252 	WINDOW *menu_win;
253 	MENU *menu;
254 	ITEM *btns[btn_num+1];
255 	int i, x, y;
256 	int res = -1;
257 
258 
259 	va_start(ap, btn_num);
260 	for (i = 0; i < btn_num; i++) {
261 		btn = va_arg(ap, char *);
262 		btns[i] = new_item(btn, "");
263 		btns_width += strlen(btn)+1;
264 	}
265 	va_end(ap);
266 	btns[btn_num] = NULL;
267 
268 	/* find the widest line of msg: */
269 	msg_lines = get_line_no(msg);
270 	for (i = 0; i < msg_lines; i++) {
271 		const char *line = get_line(msg, i);
272 		int len = get_line_length(line);
273 		if (msg_width < len)
274 			msg_width = len;
275 	}
276 
277 	total_width = max(msg_width, btns_width);
278 	/* place dialog in middle of screen */
279 	y = (LINES-(msg_lines+4))/2;
280 	x = (COLS-(total_width+4))/2;
281 
282 
283 	/* create the windows */
284 	if (btn_num > 0)
285 		win_rows = msg_lines+4;
286 	else
287 		win_rows = msg_lines+2;
288 
289 	win = newwin(win_rows, total_width+4, y, x);
290 	keypad(win, TRUE);
291 	menu_win = derwin(win, 1, btns_width, win_rows-2,
292 			1+(total_width+2-btns_width)/2);
293 	menu = new_menu(btns);
294 	msg_win = derwin(win, win_rows-2, msg_width, 1,
295 			1+(total_width+2-msg_width)/2);
296 
297 	set_menu_fore(menu, attributes[DIALOG_MENU_FORE]);
298 	set_menu_back(menu, attributes[DIALOG_MENU_BACK]);
299 
300 	(void) wattrset(win, attributes[DIALOG_BOX]);
301 	box(win, 0, 0);
302 
303 	/* print message */
304 	(void) wattrset(msg_win, attributes[DIALOG_TEXT]);
305 	fill_window(msg_win, msg);
306 
307 	set_menu_win(menu, win);
308 	set_menu_sub(menu, menu_win);
309 	set_menu_format(menu, 1, btn_num);
310 	menu_opts_off(menu, O_SHOWDESC);
311 	menu_opts_off(menu, O_SHOWMATCH);
312 	menu_opts_on(menu, O_ONEVALUE);
313 	menu_opts_on(menu, O_NONCYCLIC);
314 	set_menu_mark(menu, "");
315 	post_menu(menu);
316 
317 
318 	touchwin(win);
319 	refresh_all_windows(main_window);
320 	while ((res = wgetch(win))) {
321 		switch (res) {
322 		case KEY_LEFT:
323 			menu_driver(menu, REQ_LEFT_ITEM);
324 			break;
325 		case KEY_RIGHT:
326 			menu_driver(menu, REQ_RIGHT_ITEM);
327 			break;
328 		case 10: /* ENTER */
329 		case 27: /* ESCAPE */
330 		case ' ':
331 		case KEY_F(F_BACK):
332 		case KEY_F(F_EXIT):
333 			break;
334 		}
335 		touchwin(win);
336 		refresh_all_windows(main_window);
337 
338 		if (res == 10 || res == ' ') {
339 			res = item_index(current_item(menu));
340 			break;
341 		} else if (res == 27 || res == KEY_F(F_BACK) ||
342 				res == KEY_F(F_EXIT)) {
343 			res = KEY_EXIT;
344 			break;
345 		}
346 	}
347 
348 	unpost_menu(menu);
349 	free_menu(menu);
350 	for (i = 0; i < btn_num; i++)
351 		free_item(btns[i]);
352 
353 	delwin(win);
354 	return res;
355 }
356 
dialog_inputbox(WINDOW * main_window,const char * title,const char * prompt,const char * init,char ** resultp,int * result_len)357 int dialog_inputbox(WINDOW *main_window,
358 		const char *title, const char *prompt,
359 		const char *init, char **resultp, int *result_len)
360 {
361 	int prompt_lines = 0;
362 	int prompt_width = 0;
363 	WINDOW *win;
364 	WINDOW *prompt_win;
365 	WINDOW *form_win;
366 	PANEL *panel;
367 	int i, x, y;
368 	int res = -1;
369 	int cursor_position = strlen(init);
370 	int cursor_form_win;
371 	char *result = *resultp;
372 
373 	if (strlen(init)+1 > *result_len) {
374 		*result_len = strlen(init)+1;
375 		*resultp = result = realloc(result, *result_len);
376 	}
377 
378 	/* find the widest line of msg: */
379 	prompt_lines = get_line_no(prompt);
380 	for (i = 0; i < prompt_lines; i++) {
381 		const char *line = get_line(prompt, i);
382 		int len = get_line_length(line);
383 		prompt_width = max(prompt_width, len);
384 	}
385 
386 	if (title)
387 		prompt_width = max(prompt_width, strlen(title));
388 
389 	/* place dialog in middle of screen */
390 	y = (LINES-(prompt_lines+4))/2;
391 	x = (COLS-(prompt_width+4))/2;
392 
393 	strncpy(result, init, *result_len);
394 
395 	/* create the windows */
396 	win = newwin(prompt_lines+6, prompt_width+7, y, x);
397 	prompt_win = derwin(win, prompt_lines+1, prompt_width, 2, 2);
398 	form_win = derwin(win, 1, prompt_width, prompt_lines+3, 2);
399 	keypad(form_win, TRUE);
400 
401 	(void) wattrset(form_win, attributes[INPUT_FIELD]);
402 
403 	(void) wattrset(win, attributes[INPUT_BOX]);
404 	box(win, 0, 0);
405 	(void) wattrset(win, attributes[INPUT_HEADING]);
406 	if (title)
407 		mvwprintw(win, 0, 3, "%s", title);
408 
409 	/* print message */
410 	(void) wattrset(prompt_win, attributes[INPUT_TEXT]);
411 	fill_window(prompt_win, prompt);
412 
413 	mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
414 	cursor_form_win = min(cursor_position, prompt_width-1);
415 	mvwprintw(form_win, 0, 0, "%s",
416 		  result + cursor_position-cursor_form_win);
417 
418 	/* create panels */
419 	panel = new_panel(win);
420 
421 	/* show the cursor */
422 	curs_set(1);
423 
424 	touchwin(win);
425 	refresh_all_windows(main_window);
426 	while ((res = wgetch(form_win))) {
427 		int len = strlen(result);
428 		switch (res) {
429 		case 10: /* ENTER */
430 		case 27: /* ESCAPE */
431 		case KEY_F(F_HELP):
432 		case KEY_F(F_EXIT):
433 		case KEY_F(F_BACK):
434 			break;
435 		case 127:
436 		case KEY_BACKSPACE:
437 			if (cursor_position > 0) {
438 				memmove(&result[cursor_position-1],
439 						&result[cursor_position],
440 						len-cursor_position+1);
441 				cursor_position--;
442 				cursor_form_win--;
443 				len--;
444 			}
445 			break;
446 		case KEY_DC:
447 			if (cursor_position >= 0 && cursor_position < len) {
448 				memmove(&result[cursor_position],
449 						&result[cursor_position+1],
450 						len-cursor_position+1);
451 				len--;
452 			}
453 			break;
454 		case KEY_UP:
455 		case KEY_RIGHT:
456 			if (cursor_position < len) {
457 				cursor_position++;
458 				cursor_form_win++;
459 			}
460 			break;
461 		case KEY_DOWN:
462 		case KEY_LEFT:
463 			if (cursor_position > 0) {
464 				cursor_position--;
465 				cursor_form_win--;
466 			}
467 			break;
468 		case KEY_HOME:
469 			cursor_position = 0;
470 			cursor_form_win = 0;
471 			break;
472 		case KEY_END:
473 			cursor_position = len;
474 			cursor_form_win = min(cursor_position, prompt_width-1);
475 			break;
476 		default:
477 			if ((isgraph(res) || isspace(res))) {
478 				/* one for new char, one for '\0' */
479 				if (len+2 > *result_len) {
480 					*result_len = len+2;
481 					*resultp = result = realloc(result,
482 								*result_len);
483 				}
484 				/* insert the char at the proper position */
485 				memmove(&result[cursor_position+1],
486 						&result[cursor_position],
487 						len-cursor_position+1);
488 				result[cursor_position] = res;
489 				cursor_position++;
490 				cursor_form_win++;
491 				len++;
492 			} else {
493 				mvprintw(0, 0, "unknown key: %d\n", res);
494 			}
495 			break;
496 		}
497 		if (cursor_form_win < 0)
498 			cursor_form_win = 0;
499 		else if (cursor_form_win > prompt_width-1)
500 			cursor_form_win = prompt_width-1;
501 
502 		wmove(form_win, 0, 0);
503 		wclrtoeol(form_win);
504 		mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
505 		mvwprintw(form_win, 0, 0, "%s",
506 			result + cursor_position-cursor_form_win);
507 		wmove(form_win, 0, cursor_form_win);
508 		touchwin(win);
509 		refresh_all_windows(main_window);
510 
511 		if (res == 10) {
512 			res = 0;
513 			break;
514 		} else if (res == 27 || res == KEY_F(F_BACK) ||
515 				res == KEY_F(F_EXIT)) {
516 			res = KEY_EXIT;
517 			break;
518 		} else if (res == KEY_F(F_HELP)) {
519 			res = 1;
520 			break;
521 		}
522 	}
523 
524 	/* hide the cursor */
525 	curs_set(0);
526 	del_panel(panel);
527 	delwin(prompt_win);
528 	delwin(form_win);
529 	delwin(win);
530 	return res;
531 }
532 
533 /* refresh all windows in the correct order */
refresh_all_windows(WINDOW * main_window)534 void refresh_all_windows(WINDOW *main_window)
535 {
536 	update_panels();
537 	touchwin(main_window);
538 	refresh();
539 }
540 
541 /* layman's scrollable window... */
show_scroll_win(WINDOW * main_window,const char * title,const char * text)542 void show_scroll_win(WINDOW *main_window,
543 		const char *title,
544 		const char *text)
545 {
546 	int res;
547 	int total_lines = get_line_no(text);
548 	int x, y;
549 	int start_x = 0, start_y = 0;
550 	int text_lines = 0, text_cols = 0;
551 	int total_cols = 0;
552 	int win_cols = 0;
553 	int win_lines = 0;
554 	int i = 0;
555 	WINDOW *win;
556 	WINDOW *pad;
557 	PANEL *panel;
558 
559 	/* find the widest line of msg: */
560 	total_lines = get_line_no(text);
561 	for (i = 0; i < total_lines; i++) {
562 		const char *line = get_line(text, i);
563 		int len = get_line_length(line);
564 		total_cols = max(total_cols, len+2);
565 	}
566 
567 	/* create the pad */
568 	pad = newpad(total_lines+10, total_cols+10);
569 	(void) wattrset(pad, attributes[SCROLLWIN_TEXT]);
570 	fill_window(pad, text);
571 
572 	win_lines = min(total_lines+4, LINES-2);
573 	win_cols = min(total_cols+2, COLS-2);
574 	text_lines = max(win_lines-4, 0);
575 	text_cols = max(win_cols-2, 0);
576 
577 	/* place window in middle of screen */
578 	y = (LINES-win_lines)/2;
579 	x = (COLS-win_cols)/2;
580 
581 	win = newwin(win_lines, win_cols, y, x);
582 	keypad(win, TRUE);
583 	/* show the help in the help window, and show the help panel */
584 	(void) wattrset(win, attributes[SCROLLWIN_BOX]);
585 	box(win, 0, 0);
586 	(void) wattrset(win, attributes[SCROLLWIN_HEADING]);
587 	mvwprintw(win, 0, 3, " %s ", title);
588 	panel = new_panel(win);
589 
590 	/* handle scrolling */
591 	do {
592 
593 		copywin(pad, win, start_y, start_x, 2, 2, text_lines,
594 				text_cols, 0);
595 		print_in_middle(win,
596 				text_lines+2,
597 				0,
598 				text_cols,
599 				"<OK>",
600 				attributes[DIALOG_MENU_FORE]);
601 		wrefresh(win);
602 
603 		res = wgetch(win);
604 		switch (res) {
605 		case KEY_NPAGE:
606 		case ' ':
607 		case 'd':
608 			start_y += text_lines-2;
609 			break;
610 		case KEY_PPAGE:
611 		case 'u':
612 			start_y -= text_lines+2;
613 			break;
614 		case KEY_HOME:
615 			start_y = 0;
616 			break;
617 		case KEY_END:
618 			start_y = total_lines-text_lines;
619 			break;
620 		case KEY_DOWN:
621 		case 'j':
622 			start_y++;
623 			break;
624 		case KEY_UP:
625 		case 'k':
626 			start_y--;
627 			break;
628 		case KEY_LEFT:
629 		case 'h':
630 			start_x--;
631 			break;
632 		case KEY_RIGHT:
633 		case 'l':
634 			start_x++;
635 			break;
636 		}
637 		if (res == 10 || res == 27 || res == 'q' ||
638 			res == KEY_F(F_HELP) || res == KEY_F(F_BACK) ||
639 			res == KEY_F(F_EXIT))
640 			break;
641 		if (start_y < 0)
642 			start_y = 0;
643 		if (start_y >= total_lines-text_lines)
644 			start_y = total_lines-text_lines;
645 		if (start_x < 0)
646 			start_x = 0;
647 		if (start_x >= total_cols-text_cols)
648 			start_x = total_cols-text_cols;
649 	} while (res);
650 
651 	del_panel(panel);
652 	delwin(win);
653 	refresh_all_windows(main_window);
654 }
655