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 */
11attributes_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   */
23static 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   */
68static void normal_color_theme(void)
69{
70	/* automatically add color... */
71#define mkattr(name, attr) do { \
72attributes[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
100static 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
132void 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 !!! */
147void 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
175int 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
189const 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
203int 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. */
214void 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 */
241int 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 = (getmaxy(stdscr)-(msg_lines+4))/2;
280	x = (getmaxx(stdscr)-(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
357int 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 = (getmaxy(stdscr)-(prompt_lines+4))/2;
391	x = (getmaxx(stdscr)-(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 */
534void refresh_all_windows(WINDOW *main_window)
535{
536	update_panels();
537	touchwin(main_window);
538	refresh();
539}
540
541/* layman's scrollable window... */
542void 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, lines, columns;
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	getmaxyx(stdscr, lines, columns);
560
561	/* find the widest line of msg: */
562	total_lines = get_line_no(text);
563	for (i = 0; i < total_lines; i++) {
564		const char *line = get_line(text, i);
565		int len = get_line_length(line);
566		total_cols = max(total_cols, len+2);
567	}
568
569	/* create the pad */
570	pad = newpad(total_lines+10, total_cols+10);
571	(void) wattrset(pad, attributes[SCROLLWIN_TEXT]);
572	fill_window(pad, text);
573
574	win_lines = min(total_lines+4, lines-2);
575	win_cols = min(total_cols+2, columns-2);
576	text_lines = max(win_lines-4, 0);
577	text_cols = max(win_cols-2, 0);
578
579	/* place window in middle of screen */
580	y = (lines-win_lines)/2;
581	x = (columns-win_cols)/2;
582
583	win = newwin(win_lines, win_cols, y, x);
584	keypad(win, TRUE);
585	/* show the help in the help window, and show the help panel */
586	(void) wattrset(win, attributes[SCROLLWIN_BOX]);
587	box(win, 0, 0);
588	(void) wattrset(win, attributes[SCROLLWIN_HEADING]);
589	mvwprintw(win, 0, 3, " %s ", title);
590	panel = new_panel(win);
591
592	/* handle scrolling */
593	do {
594
595		copywin(pad, win, start_y, start_x, 2, 2, text_lines,
596				text_cols, 0);
597		print_in_middle(win,
598				text_lines+2,
599				0,
600				text_cols,
601				"<OK>",
602				attributes[DIALOG_MENU_FORE]);
603		wrefresh(win);
604
605		res = wgetch(win);
606		switch (res) {
607		case KEY_NPAGE:
608		case ' ':
609		case 'd':
610			start_y += text_lines-2;
611			break;
612		case KEY_PPAGE:
613		case 'u':
614			start_y -= text_lines+2;
615			break;
616		case KEY_HOME:
617			start_y = 0;
618			break;
619		case KEY_END:
620			start_y = total_lines-text_lines;
621			break;
622		case KEY_DOWN:
623		case 'j':
624			start_y++;
625			break;
626		case KEY_UP:
627		case 'k':
628			start_y--;
629			break;
630		case KEY_LEFT:
631		case 'h':
632			start_x--;
633			break;
634		case KEY_RIGHT:
635		case 'l':
636			start_x++;
637			break;
638		}
639		if (res == 10 || res == 27 || res == 'q' ||
640			res == KEY_F(F_HELP) || res == KEY_F(F_BACK) ||
641			res == KEY_F(F_EXIT))
642			break;
643		if (start_y < 0)
644			start_y = 0;
645		if (start_y >= total_lines-text_lines)
646			start_y = total_lines-text_lines;
647		if (start_x < 0)
648			start_x = 0;
649		if (start_x >= total_cols-text_cols)
650			start_x = total_cols-text_cols;
651	} while (res);
652
653	del_panel(panel);
654	delwin(win);
655	refresh_all_windows(main_window);
656}
657