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_BLUE, -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 = (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
357int dialog_inputbox(WINDOW *main_window,
358		const char *title, const char *prompt,
359		const char *init, char *result, 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
371
372	/* find the widest line of msg: */
373	prompt_lines = get_line_no(prompt);
374	for (i = 0; i < prompt_lines; i++) {
375		const char *line = get_line(prompt, i);
376		int len = get_line_length(line);
377		prompt_width = max(prompt_width, len);
378	}
379
380	if (title)
381		prompt_width = max(prompt_width, strlen(title));
382
383	/* place dialog in middle of screen */
384	y = (LINES-(prompt_lines+4))/2;
385	x = (COLS-(prompt_width+4))/2;
386
387	strncpy(result, init, result_len);
388
389	/* create the windows */
390	win = newwin(prompt_lines+6, prompt_width+7, y, x);
391	prompt_win = derwin(win, prompt_lines+1, prompt_width, 2, 2);
392	form_win = derwin(win, 1, prompt_width, prompt_lines+3, 2);
393	keypad(form_win, TRUE);
394
395	(void) wattrset(form_win, attributes[INPUT_FIELD]);
396
397	(void) wattrset(win, attributes[INPUT_BOX]);
398	box(win, 0, 0);
399	(void) wattrset(win, attributes[INPUT_HEADING]);
400	if (title)
401		mvwprintw(win, 0, 3, "%s", title);
402
403	/* print message */
404	(void) wattrset(prompt_win, attributes[INPUT_TEXT]);
405	fill_window(prompt_win, prompt);
406
407	mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
408	mvwprintw(form_win, 0, 0, "%s", result);
409
410	/* create panels */
411	panel = new_panel(win);
412
413	/* show the cursor */
414	curs_set(1);
415
416	touchwin(win);
417	refresh_all_windows(main_window);
418	while ((res = wgetch(form_win))) {
419		int len = strlen(result);
420		switch (res) {
421		case 10: /* ENTER */
422		case 27: /* ESCAPE */
423		case KEY_F(F_HELP):
424		case KEY_F(F_EXIT):
425		case KEY_F(F_BACK):
426			break;
427		case 127:
428		case KEY_BACKSPACE:
429			if (cursor_position > 0) {
430				memmove(&result[cursor_position-1],
431						&result[cursor_position],
432						len-cursor_position+1);
433				cursor_position--;
434			}
435			break;
436		case KEY_DC:
437			if (cursor_position >= 0 && cursor_position < len) {
438				memmove(&result[cursor_position],
439						&result[cursor_position+1],
440						len-cursor_position+1);
441			}
442			break;
443		case KEY_UP:
444		case KEY_RIGHT:
445			if (cursor_position < len &&
446			    cursor_position < min(result_len, prompt_width))
447				cursor_position++;
448			break;
449		case KEY_DOWN:
450		case KEY_LEFT:
451			if (cursor_position > 0)
452				cursor_position--;
453			break;
454		default:
455			if ((isgraph(res) || isspace(res)) &&
456					len-2 < result_len) {
457				/* insert the char at the proper position */
458				memmove(&result[cursor_position+1],
459						&result[cursor_position],
460						len+1);
461				result[cursor_position] = res;
462				cursor_position++;
463			} else {
464				mvprintw(0, 0, "unknow key: %d\n", res);
465			}
466			break;
467		}
468		wmove(form_win, 0, 0);
469		wclrtoeol(form_win);
470		mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
471		mvwprintw(form_win, 0, 0, "%s", result);
472		wmove(form_win, 0, cursor_position);
473		touchwin(win);
474		refresh_all_windows(main_window);
475
476		if (res == 10) {
477			res = 0;
478			break;
479		} else if (res == 27 || res == KEY_F(F_BACK) ||
480				res == KEY_F(F_EXIT)) {
481			res = KEY_EXIT;
482			break;
483		} else if (res == KEY_F(F_HELP)) {
484			res = 1;
485			break;
486		}
487	}
488
489	/* hide the cursor */
490	curs_set(0);
491	del_panel(panel);
492	delwin(prompt_win);
493	delwin(form_win);
494	delwin(win);
495	return res;
496}
497
498/* refresh all windows in the correct order */
499void refresh_all_windows(WINDOW *main_window)
500{
501	update_panels();
502	touchwin(main_window);
503	refresh();
504}
505
506/* layman's scrollable window... */
507void show_scroll_win(WINDOW *main_window,
508		const char *title,
509		const char *text)
510{
511	int res;
512	int total_lines = get_line_no(text);
513	int x, y;
514	int start_x = 0, start_y = 0;
515	int text_lines = 0, text_cols = 0;
516	int total_cols = 0;
517	int win_cols = 0;
518	int win_lines = 0;
519	int i = 0;
520	WINDOW *win;
521	WINDOW *pad;
522	PANEL *panel;
523
524	/* find the widest line of msg: */
525	total_lines = get_line_no(text);
526	for (i = 0; i < total_lines; i++) {
527		const char *line = get_line(text, i);
528		int len = get_line_length(line);
529		total_cols = max(total_cols, len+2);
530	}
531
532	/* create the pad */
533	pad = newpad(total_lines+10, total_cols+10);
534	(void) wattrset(pad, attributes[SCROLLWIN_TEXT]);
535	fill_window(pad, text);
536
537	win_lines = min(total_lines+4, LINES-2);
538	win_cols = min(total_cols+2, COLS-2);
539	text_lines = max(win_lines-4, 0);
540	text_cols = max(win_cols-2, 0);
541
542	/* place window in middle of screen */
543	y = (LINES-win_lines)/2;
544	x = (COLS-win_cols)/2;
545
546	win = newwin(win_lines, win_cols, y, x);
547	keypad(win, TRUE);
548	/* show the help in the help window, and show the help panel */
549	(void) wattrset(win, attributes[SCROLLWIN_BOX]);
550	box(win, 0, 0);
551	(void) wattrset(win, attributes[SCROLLWIN_HEADING]);
552	mvwprintw(win, 0, 3, " %s ", title);
553	panel = new_panel(win);
554
555	/* handle scrolling */
556	do {
557
558		copywin(pad, win, start_y, start_x, 2, 2, text_lines,
559				text_cols, 0);
560		print_in_middle(win,
561				text_lines+2,
562				0,
563				text_cols,
564				"<OK>",
565				attributes[DIALOG_MENU_FORE]);
566		wrefresh(win);
567
568		res = wgetch(win);
569		switch (res) {
570		case KEY_NPAGE:
571		case ' ':
572			start_y += text_lines-2;
573			break;
574		case KEY_PPAGE:
575			start_y -= text_lines+2;
576			break;
577		case KEY_HOME:
578			start_y = 0;
579			break;
580		case KEY_END:
581			start_y = total_lines-text_lines;
582			break;
583		case KEY_DOWN:
584		case 'j':
585			start_y++;
586			break;
587		case KEY_UP:
588		case 'k':
589			start_y--;
590			break;
591		case KEY_LEFT:
592		case 'h':
593			start_x--;
594			break;
595		case KEY_RIGHT:
596		case 'l':
597			start_x++;
598			break;
599		}
600		if (res == 10 || res == 27 || res == 'q'
601		    || res == KEY_F(F_BACK) || res == KEY_F(F_EXIT)) {
602			break;
603		}
604		if (start_y < 0)
605			start_y = 0;
606		if (start_y >= total_lines-text_lines)
607			start_y = total_lines-text_lines;
608		if (start_x < 0)
609			start_x = 0;
610		if (start_x >= total_cols-text_cols)
611			start_x = total_cols-text_cols;
612	} while (res);
613
614	del_panel(panel);
615	delwin(win);
616	refresh_all_windows(main_window);
617}
618