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#define _GNU_SOURCE
9#include <string.h>
10
11#include "lkc.h"
12#include "nconf.h"
13#include <ctype.h>
14
15static const char nconf_readme[] = N_(
16"Overview\n"
17"--------\n"
18"This interface let you select features and parameters for the build.\n"
19"Features can either be built-in, modularized, or ignored. Parameters\n"
20"must be entered in as decimal or hexadecimal numbers or text.\n"
21"\n"
22"Menu items beginning with following braces represent features that\n"
23"  [ ] can be built in or removed\n"
24"  < > can be built in, modularized or removed\n"
25"  { } can be built in or modularized (selected by other feature)\n"
26"  - - are selected by other feature,\n"
27"  XXX cannot be selected. Use Symbol Info to find out why,\n"
28"while *, M or whitespace inside braces means to build in, build as\n"
29"a module or to exclude the feature respectively.\n"
30"\n"
31"To change any of these features, highlight it with the cursor\n"
32"keys and press <Y> to build it in, <M> to make it a module or\n"
33"<N> to removed it.  You may also press the <Space Bar> to cycle\n"
34"through the available options (ie. Y->N->M->Y).\n"
35"\n"
36"Some additional keyboard hints:\n"
37"\n"
38"Menus\n"
39"----------\n"
40"o  Use the Up/Down arrow keys (cursor keys) to highlight the item\n"
41"   you wish to change use <Enter> or <Space>. Goto submenu by \n"
42"   pressing <Enter> of <right-arrow>. Use <Esc> or <left-arrow> to go back.\n"
43"   Submenus are designated by \"--->\".\n"
44"\n"
45"   Searching: pressing '/' triggers interactive search mode.\n"
46"              nconfig performs a case insensitive search for the string\n"
47"              in the menu prompts (no regex support).\n"
48"              Pressing the up/down keys highlights the previous/next\n"
49"              matching item. Backspace removes one character from the\n"
50"              match string. Pressing either '/' again or ESC exits\n"
51"              search mode. All other keys behave normally.\n"
52"\n"
53"   You may also use the <PAGE UP> and <PAGE DOWN> keys to scroll\n"
54"   unseen options into view.\n"
55"\n"
56"o  To exit a menu use the just press <ESC> <F5> <F8> or <left-arrow>.\n"
57"\n"
58"o  To get help with an item, press <F1>\n"
59"   Shortcut: Press <h> or <?>.\n"
60"\n"
61"\n"
62"Radiolists  (Choice lists)\n"
63"-----------\n"
64"o  Use the cursor keys to select the option you wish to set and press\n"
65"   <S> or the <SPACE BAR>.\n"
66"\n"
67"   Shortcut: Press the first letter of the option you wish to set then\n"
68"             press <S> or <SPACE BAR>.\n"
69"\n"
70"o  To see available help for the item, press <F1>\n"
71"   Shortcut: Press <H> or <?>.\n"
72"\n"
73"\n"
74"Data Entry\n"
75"-----------\n"
76"o  Enter the requested information and press <ENTER>\n"
77"   If you are entering hexadecimal values, it is not necessary to\n"
78"   add the '0x' prefix to the entry.\n"
79"\n"
80"o  For help, press <F1>.\n"
81"\n"
82"\n"
83"Text Box    (Help Window)\n"
84"--------\n"
85"o  Use the cursor keys to scroll up/down/left/right.  The VI editor\n"
86"   keys h,j,k,l function here as do <SPACE BAR> for those\n"
87"   who are familiar with less and lynx.\n"
88"\n"
89"o  Press <Enter>, <F1>, <F5>, <F7> or <Esc> to exit.\n"
90"\n"
91"\n"
92"Alternate Configuration Files\n"
93"-----------------------------\n"
94"nconfig supports the use of alternate configuration files for\n"
95"those who, for various reasons, find it necessary to switch\n"
96"between different configurations.\n"
97"\n"
98"At the end of the main menu you will find two options.  One is\n"
99"for saving the current configuration to a file of your choosing.\n"
100"The other option is for loading a previously saved alternate\n"
101"configuration.\n"
102"\n"
103"Even if you don't use alternate configuration files, but you\n"
104"find during a nconfig session that you have completely messed\n"
105"up your settings, you may use the \"Load Alternate...\" option to\n"
106"restore your previously saved settings from \".config\" without\n"
107"restarting nconfig.\n"
108"\n"
109"Other information\n"
110"-----------------\n"
111"If you use nconfig in an XTERM window make sure you have your\n"
112"$TERM variable set to point to a xterm definition which supports color.\n"
113"Otherwise, nconfig will look rather bad.  nconfig will not\n"
114"display correctly in a RXVT window because rxvt displays only one\n"
115"intensity of color, bright.\n"
116"\n"
117"nconfig will display larger menus on screens or xterms which are\n"
118"set to display more than the standard 25 row by 80 column geometry.\n"
119"In order for this to work, the \"stty size\" command must be able to\n"
120"display the screen's current row and column geometry.  I STRONGLY\n"
121"RECOMMEND that you make sure you do NOT have the shell variables\n"
122"LINES and COLUMNS exported into your environment.  Some distributions\n"
123"export those variables via /etc/profile.  Some ncurses programs can\n"
124"become confused when those variables (LINES & COLUMNS) don't reflect\n"
125"the true screen size.\n"
126"\n"
127"Optional personality available\n"
128"------------------------------\n"
129"If you prefer to have all of the options listed in a single menu, rather\n"
130"than the default multimenu hierarchy, run the nconfig with NCONFIG_MODE\n"
131"environment variable set to single_menu. Example:\n"
132"\n"
133"make NCONFIG_MODE=single_menu nconfig\n"
134"\n"
135"<Enter> will then unroll the appropriate category, or enfold it if it\n"
136"is already unrolled.\n"
137"\n"
138"Note that this mode can eventually be a little more CPU expensive\n"
139"(especially with a larger number of unrolled categories) than the\n"
140"default mode.\n"
141"\n"),
142menu_no_f_instructions[] = N_(
143" You do not have function keys support. Please follow the\n"
144" following instructions:\n"
145" Arrow keys navigate the menu.\n"
146" <Enter> or <right-arrow> selects submenus --->.\n"
147" Capital Letters are hotkeys.\n"
148" Pressing <Y> includes, <N> excludes, <M> modularizes features.\n"
149" Pressing SpaceBar toggles between the above options.\n"
150" Press <Esc> or <left-arrow> to go back one menu,\n"
151" <?> or <h> for Help, </> for Search.\n"
152" <1> is interchangeable with <F1>, <2> with <F2>, etc.\n"
153" Legend: [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
154" <Esc> always leaves the current window.\n"),
155menu_instructions[] = N_(
156" Arrow keys navigate the menu.\n"
157" <Enter> or <right-arrow> selects submenus --->.\n"
158" Capital Letters are hotkeys.\n"
159" Pressing <Y> includes, <N> excludes, <M> modularizes features.\n"
160" Pressing SpaceBar toggles between the above options\n"
161" Press <Esc>, <F5> or <left-arrow> to go back one menu,\n"
162" <?>, <F1> or <h> for Help, </> for Search.\n"
163" <1> is interchangeable with <F1>, <2> with <F2>, etc.\n"
164" Legend: [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
165" <Esc> always leaves the current window\n"),
166radiolist_instructions[] = N_(
167" Use the arrow keys to navigate this window or\n"
168" press the hotkey of the item you wish to select\n"
169" followed by the <SPACE BAR>.\n"
170" Press <?>, <F1> or <h> for additional information about this option.\n"),
171inputbox_instructions_int[] = N_(
172"Please enter a decimal value.\n"
173"Fractions will not be accepted.\n"
174"Press <RETURN> to accept, <ESC> to cancel."),
175inputbox_instructions_hex[] = N_(
176"Please enter a hexadecimal value.\n"
177"Press <RETURN> to accept, <ESC> to cancel."),
178inputbox_instructions_string[] = N_(
179"Please enter a string value.\n"
180"Press <RETURN> to accept, <ESC> to cancel."),
181setmod_text[] = N_(
182"This feature depends on another which\n"
183"has been configured as a module.\n"
184"As a result, this feature will be built as a module."),
185load_config_text[] = N_(
186"Enter the name of the configuration file you wish to load.\n"
187"Accept the name shown to restore the configuration you\n"
188"last retrieved.  Leave blank to abort."),
189load_config_help[] = N_(
190"\n"
191"For various reasons, one may wish to keep several different\n"
192"configurations available on a single machine.\n"
193"\n"
194"If you have saved a previous configuration in a file other than the\n"
195"default one, entering its name here will allow you to modify that\n"
196"configuration.\n"
197"\n"
198"If you are uncertain, then you have probably never used alternate\n"
199"configuration files.  You should therefor leave this blank to abort.\n"),
200save_config_text[] = N_(
201"Enter a filename to which this configuration should be saved\n"
202"as an alternate.  Leave blank to abort."),
203save_config_help[] = N_(
204"\n"
205"For various reasons, one may wish to keep different configurations\n"
206"available on a single machine.\n"
207"\n"
208"Entering a file name here will allow you to later retrieve, modify\n"
209"and use the current configuration as an alternate to whatever\n"
210"configuration options you have selected at that time.\n"
211"\n"
212"If you are uncertain what all this means then you should probably\n"
213"leave this blank.\n"),
214search_help[] = N_(
215"\n"
216"Search for symbols and display their relations. Regular expressions\n"
217"are allowed.\n"
218"Example: search for \"^FOO\"\n"
219"Result:\n"
220"-----------------------------------------------------------------\n"
221"Symbol: FOO [ = m]\n"
222"Prompt: Foo bus is used to drive the bar HW\n"
223"Defined at drivers/pci/Kconfig:47\n"
224"Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
225"Location:\n"
226"  -> Bus options (PCI, PCMCIA, EISA, MCA, ISA)\n"
227"    -> PCI support (PCI [ = y])\n"
228"      -> PCI access mode (<choice> [ = y])\n"
229"Selects: LIBCRC32\n"
230"Selected by: BAR\n"
231"-----------------------------------------------------------------\n"
232"o The line 'Prompt:' shows the text used in the menu structure for\n"
233"  this symbol\n"
234"o The 'Defined at' line tell at what file / line number the symbol\n"
235"  is defined\n"
236"o The 'Depends on:' line tell what symbols needs to be defined for\n"
237"  this symbol to be visible in the menu (selectable)\n"
238"o The 'Location:' lines tell where in the menu structure this symbol\n"
239"  is located\n"
240"    A location followed by a [ = y] indicate that this is a selectable\n"
241"    menu item - and current value is displayed inside brackets.\n"
242"o The 'Selects:' line tell what symbol will be automatically\n"
243"  selected if this symbol is selected (y or m)\n"
244"o The 'Selected by' line tell what symbol has selected this symbol\n"
245"\n"
246"Only relevant lines are shown.\n"
247"\n\n"
248"Search examples:\n"
249"Examples: USB  => find all symbols containing USB\n"
250"          ^USB => find all symbols starting with USB\n"
251"          USB$ => find all symbols ending with USB\n"
252"\n");
253
254struct mitem {
255	char str[256];
256	char tag;
257	void *usrptr;
258	int is_visible;
259};
260
261#define MAX_MENU_ITEMS 4096
262static int show_all_items;
263static int indent;
264static struct menu *current_menu;
265static int child_count;
266static int single_menu_mode;
267/* the window in which all information appears */
268static WINDOW *main_window;
269/* the largest size of the menu window */
270static int mwin_max_lines;
271static int mwin_max_cols;
272/* the window in which we show option buttons */
273static MENU *curses_menu;
274static ITEM *curses_menu_items[MAX_MENU_ITEMS];
275static struct mitem k_menu_items[MAX_MENU_ITEMS];
276static int items_num;
277static int global_exit;
278/* the currently selected button */
279const char *current_instructions = menu_instructions;
280
281static char *dialog_input_result;
282static int dialog_input_result_len;
283
284static void conf(struct menu *menu);
285static void conf_choice(struct menu *menu);
286static void conf_string(struct menu *menu);
287static void conf_load(void);
288static void conf_save(void);
289static void show_help(struct menu *menu);
290static int do_exit(void);
291static void setup_windows(void);
292static void search_conf(void);
293
294typedef void (*function_key_handler_t)(int *key, struct menu *menu);
295static void handle_f1(int *key, struct menu *current_item);
296static void handle_f2(int *key, struct menu *current_item);
297static void handle_f3(int *key, struct menu *current_item);
298static void handle_f4(int *key, struct menu *current_item);
299static void handle_f5(int *key, struct menu *current_item);
300static void handle_f6(int *key, struct menu *current_item);
301static void handle_f7(int *key, struct menu *current_item);
302static void handle_f8(int *key, struct menu *current_item);
303static void handle_f9(int *key, struct menu *current_item);
304
305struct function_keys {
306	const char *key_str;
307	const char *func;
308	function_key key;
309	function_key_handler_t handler;
310};
311
312static const int function_keys_num = 9;
313struct function_keys function_keys[] = {
314	{
315		.key_str = "F1",
316		.func = "Help",
317		.key = F_HELP,
318		.handler = handle_f1,
319	},
320	{
321		.key_str = "F2",
322		.func = "Sym Info",
323		.key = F_SYMBOL,
324		.handler = handle_f2,
325	},
326	{
327		.key_str = "F3",
328		.func = "Insts",
329		.key = F_INSTS,
330		.handler = handle_f3,
331	},
332	{
333		.key_str = "F4",
334		.func = "Config",
335		.key = F_CONF,
336		.handler = handle_f4,
337	},
338	{
339		.key_str = "F5",
340		.func = "Back",
341		.key = F_BACK,
342		.handler = handle_f5,
343	},
344	{
345		.key_str = "F6",
346		.func = "Save",
347		.key = F_SAVE,
348		.handler = handle_f6,
349	},
350	{
351		.key_str = "F7",
352		.func = "Load",
353		.key = F_LOAD,
354		.handler = handle_f7,
355	},
356	{
357		.key_str = "F8",
358		.func = "Sym Search",
359		.key = F_SEARCH,
360		.handler = handle_f8,
361	},
362	{
363		.key_str = "F9",
364		.func = "Exit",
365		.key = F_EXIT,
366		.handler = handle_f9,
367	},
368};
369
370static void print_function_line(void)
371{
372	int i;
373	int offset = 1;
374	const int skip = 1;
375
376	for (i = 0; i < function_keys_num; i++) {
377		(void) wattrset(main_window, attributes[FUNCTION_HIGHLIGHT]);
378		mvwprintw(main_window, LINES-3, offset,
379				"%s",
380				function_keys[i].key_str);
381		(void) wattrset(main_window, attributes[FUNCTION_TEXT]);
382		offset += strlen(function_keys[i].key_str);
383		mvwprintw(main_window, LINES-3,
384				offset, "%s",
385				function_keys[i].func);
386		offset += strlen(function_keys[i].func) + skip;
387	}
388	(void) wattrset(main_window, attributes[NORMAL]);
389}
390
391/* help */
392static void handle_f1(int *key, struct menu *current_item)
393{
394	show_scroll_win(main_window,
395			_("README"), _(nconf_readme));
396	return;
397}
398
399/* symbole help */
400static void handle_f2(int *key, struct menu *current_item)
401{
402	show_help(current_item);
403	return;
404}
405
406/* instructions */
407static void handle_f3(int *key, struct menu *current_item)
408{
409	show_scroll_win(main_window,
410			_("Instructions"),
411			_(current_instructions));
412	return;
413}
414
415/* config */
416static void handle_f4(int *key, struct menu *current_item)
417{
418	int res = btn_dialog(main_window,
419			_("Show all symbols?"),
420			2,
421			"   <Show All>   ",
422			"<Don't show all>");
423	if (res == 0)
424		show_all_items = 1;
425	else if (res == 1)
426		show_all_items = 0;
427
428	return;
429}
430
431/* back */
432static void handle_f5(int *key, struct menu *current_item)
433{
434	*key = KEY_LEFT;
435	return;
436}
437
438/* save */
439static void handle_f6(int *key, struct menu *current_item)
440{
441	conf_save();
442	return;
443}
444
445/* load */
446static void handle_f7(int *key, struct menu *current_item)
447{
448	conf_load();
449	return;
450}
451
452/* search */
453static void handle_f8(int *key, struct menu *current_item)
454{
455	search_conf();
456	return;
457}
458
459/* exit */
460static void handle_f9(int *key, struct menu *current_item)
461{
462	do_exit();
463	return;
464}
465
466/* return != 0 to indicate the key was handles */
467static int process_special_keys(int *key, struct menu *menu)
468{
469	int i;
470
471	if (*key == KEY_RESIZE) {
472		setup_windows();
473		return 1;
474	}
475
476	for (i = 0; i < function_keys_num; i++) {
477		if (*key == KEY_F(function_keys[i].key) ||
478		    *key == '0' + function_keys[i].key){
479			function_keys[i].handler(key, menu);
480			return 1;
481		}
482	}
483
484	return 0;
485}
486
487static void clean_items(void)
488{
489	int i;
490	for (i = 0; curses_menu_items[i]; i++)
491		free_item(curses_menu_items[i]);
492	bzero(curses_menu_items, sizeof(curses_menu_items));
493	bzero(k_menu_items, sizeof(k_menu_items));
494	items_num = 0;
495}
496
497typedef enum {MATCH_TINKER_PATTERN_UP, MATCH_TINKER_PATTERN_DOWN,
498	FIND_NEXT_MATCH_DOWN, FIND_NEXT_MATCH_UP} match_f;
499
500/* return the index of the matched item, or -1 if no such item exists */
501static int get_mext_match(const char *match_str, match_f flag)
502{
503	int match_start = item_index(current_item(curses_menu));
504	int index;
505
506	if (flag == FIND_NEXT_MATCH_DOWN)
507		++match_start;
508	else if (flag == FIND_NEXT_MATCH_UP)
509		--match_start;
510
511	index = match_start;
512	index = (index + items_num) % items_num;
513	while (true) {
514		char *str = k_menu_items[index].str;
515		if (strcasestr(str, match_str) != 0)
516			return index;
517		if (flag == FIND_NEXT_MATCH_UP ||
518		    flag == MATCH_TINKER_PATTERN_UP)
519			--index;
520		else
521			++index;
522		index = (index + items_num) % items_num;
523		if (index == match_start)
524			return -1;
525	}
526}
527
528/* Make a new item. */
529static void item_make(struct menu *menu, char tag, const char *fmt, ...)
530{
531	va_list ap;
532
533	if (items_num > MAX_MENU_ITEMS-1)
534		return;
535
536	bzero(&k_menu_items[items_num], sizeof(k_menu_items[0]));
537	k_menu_items[items_num].tag = tag;
538	k_menu_items[items_num].usrptr = menu;
539	if (menu != NULL)
540		k_menu_items[items_num].is_visible =
541			menu_is_visible(menu);
542	else
543		k_menu_items[items_num].is_visible = 1;
544
545	va_start(ap, fmt);
546	vsnprintf(k_menu_items[items_num].str,
547		  sizeof(k_menu_items[items_num].str),
548		  fmt, ap);
549	va_end(ap);
550
551	if (!k_menu_items[items_num].is_visible)
552		memcpy(k_menu_items[items_num].str, "XXX", 3);
553
554	curses_menu_items[items_num] = new_item(
555			k_menu_items[items_num].str,
556			k_menu_items[items_num].str);
557	set_item_userptr(curses_menu_items[items_num],
558			&k_menu_items[items_num]);
559	/*
560	if (!k_menu_items[items_num].is_visible)
561		item_opts_off(curses_menu_items[items_num], O_SELECTABLE);
562	*/
563
564	items_num++;
565	curses_menu_items[items_num] = NULL;
566}
567
568/* very hackish. adds a string to the last item added */
569static void item_add_str(const char *fmt, ...)
570{
571	va_list ap;
572	int index = items_num-1;
573	char new_str[256];
574	char tmp_str[256];
575
576	if (index < 0)
577		return;
578
579	va_start(ap, fmt);
580	vsnprintf(new_str, sizeof(new_str), fmt, ap);
581	va_end(ap);
582	snprintf(tmp_str, sizeof(tmp_str), "%s%s",
583			k_menu_items[index].str, new_str);
584	strncpy(k_menu_items[index].str,
585		tmp_str,
586		sizeof(k_menu_items[index].str));
587
588	free_item(curses_menu_items[index]);
589	curses_menu_items[index] = new_item(
590			k_menu_items[index].str,
591			k_menu_items[index].str);
592	set_item_userptr(curses_menu_items[index],
593			&k_menu_items[index]);
594}
595
596/* get the tag of the currently selected item */
597static char item_tag(void)
598{
599	ITEM *cur;
600	struct mitem *mcur;
601
602	cur = current_item(curses_menu);
603	if (cur == NULL)
604		return 0;
605	mcur = (struct mitem *) item_userptr(cur);
606	return mcur->tag;
607}
608
609static int curses_item_index(void)
610{
611	return  item_index(current_item(curses_menu));
612}
613
614static void *item_data(void)
615{
616	ITEM *cur;
617	struct mitem *mcur;
618
619	cur = current_item(curses_menu);
620	if (!cur)
621		return NULL;
622	mcur = (struct mitem *) item_userptr(cur);
623	return mcur->usrptr;
624
625}
626
627static int item_is_tag(char tag)
628{
629	return item_tag() == tag;
630}
631
632static char filename[PATH_MAX+1];
633static char menu_backtitle[PATH_MAX+128];
634static const char *set_config_filename(const char *config_filename)
635{
636	int size;
637
638	size = snprintf(menu_backtitle, sizeof(menu_backtitle),
639			"%s - %s", config_filename, rootmenu.prompt->text);
640	if (size >= sizeof(menu_backtitle))
641		menu_backtitle[sizeof(menu_backtitle)-1] = '\0';
642
643	size = snprintf(filename, sizeof(filename), "%s", config_filename);
644	if (size >= sizeof(filename))
645		filename[sizeof(filename)-1] = '\0';
646	return menu_backtitle;
647}
648
649/* return = 0 means we are successful.
650 * -1 means go on doing what you were doing
651 */
652static int do_exit(void)
653{
654	int res;
655	if (!conf_get_changed()) {
656		global_exit = 1;
657		return 0;
658	}
659	res = btn_dialog(main_window,
660			_("Do you wish to save your new configuration?\n"
661				"<ESC> to cancel and resume nconfig."),
662			2,
663			"   <save>   ",
664			"<don't save>");
665	if (res == KEY_EXIT) {
666		global_exit = 0;
667		return -1;
668	}
669
670	/* if we got here, the user really wants to exit */
671	switch (res) {
672	case 0:
673		res = conf_write(filename);
674		if (res)
675			btn_dialog(
676				main_window,
677				_("Error during writing of configuration.\n"
678				  "Your configuration changes were NOT saved."),
679				  1,
680				  "<OK>");
681		break;
682	default:
683		btn_dialog(
684			main_window,
685			_("Your configuration changes were NOT saved."),
686			1,
687			"<OK>");
688		break;
689	}
690	global_exit = 1;
691	return 0;
692}
693
694
695static void search_conf(void)
696{
697	struct symbol **sym_arr;
698	struct gstr res;
699	char *dialog_input;
700	int dres;
701again:
702	dres = dialog_inputbox(main_window,
703			_("Search Configuration Parameter"),
704			_("Enter " CONFIG_ " (sub)string to search for "
705				"(with or without \"" CONFIG_ "\")"),
706			"", &dialog_input_result, &dialog_input_result_len);
707	switch (dres) {
708	case 0:
709		break;
710	case 1:
711		show_scroll_win(main_window,
712				_("Search Configuration"), search_help);
713		goto again;
714	default:
715		return;
716	}
717
718	/* strip the prefix if necessary */
719	dialog_input = dialog_input_result;
720	if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
721		dialog_input += strlen(CONFIG_);
722
723	sym_arr = sym_re_search(dialog_input);
724	res = get_relations_str(sym_arr);
725	free(sym_arr);
726	show_scroll_win(main_window,
727			_("Search Results"), str_get(&res));
728	str_free(&res);
729}
730
731
732static void build_conf(struct menu *menu)
733{
734	struct symbol *sym;
735	struct property *prop;
736	struct menu *child;
737	int type, tmp, doint = 2;
738	tristate val;
739	char ch;
740
741	if (!menu || (!show_all_items && !menu_is_visible(menu)))
742		return;
743
744	sym = menu->sym;
745	prop = menu->prompt;
746	if (!sym) {
747		if (prop && menu != current_menu) {
748			const char *prompt = menu_get_prompt(menu);
749			enum prop_type ptype;
750			ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
751			switch (ptype) {
752			case P_MENU:
753				child_count++;
754				prompt = _(prompt);
755				if (single_menu_mode) {
756					item_make(menu, 'm',
757						"%s%*c%s",
758						menu->data ? "-->" : "++>",
759						indent + 1, ' ', prompt);
760				} else
761					item_make(menu, 'm',
762						"   %*c%s  --->",
763						indent + 1,
764						' ', prompt);
765
766				if (single_menu_mode && menu->data)
767					goto conf_childs;
768				return;
769			case P_COMMENT:
770				if (prompt) {
771					child_count++;
772					item_make(menu, ':',
773						"   %*c*** %s ***",
774						indent + 1, ' ',
775						_(prompt));
776				}
777				break;
778			default:
779				if (prompt) {
780					child_count++;
781					item_make(menu, ':', "---%*c%s",
782						indent + 1, ' ',
783						_(prompt));
784				}
785			}
786		} else
787			doint = 0;
788		goto conf_childs;
789	}
790
791	type = sym_get_type(sym);
792	if (sym_is_choice(sym)) {
793		struct symbol *def_sym = sym_get_choice_value(sym);
794		struct menu *def_menu = NULL;
795
796		child_count++;
797		for (child = menu->list; child; child = child->next) {
798			if (menu_is_visible(child) && child->sym == def_sym)
799				def_menu = child;
800		}
801
802		val = sym_get_tristate_value(sym);
803		if (sym_is_changable(sym)) {
804			switch (type) {
805			case S_BOOLEAN:
806				item_make(menu, 't', "[%c]",
807						val == no ? ' ' : '*');
808				break;
809			case S_TRISTATE:
810				switch (val) {
811				case yes:
812					ch = '*';
813					break;
814				case mod:
815					ch = 'M';
816					break;
817				default:
818					ch = ' ';
819					break;
820				}
821				item_make(menu, 't', "<%c>", ch);
822				break;
823			}
824		} else {
825			item_make(menu, def_menu ? 't' : ':', "   ");
826		}
827
828		item_add_str("%*c%s", indent + 1,
829				' ', _(menu_get_prompt(menu)));
830		if (val == yes) {
831			if (def_menu) {
832				item_add_str(" (%s)",
833					_(menu_get_prompt(def_menu)));
834				item_add_str("  --->");
835				if (def_menu->list) {
836					indent += 2;
837					build_conf(def_menu);
838					indent -= 2;
839				}
840			}
841			return;
842		}
843	} else {
844		if (menu == current_menu) {
845			item_make(menu, ':',
846				"---%*c%s", indent + 1,
847				' ', _(menu_get_prompt(menu)));
848			goto conf_childs;
849		}
850		child_count++;
851		val = sym_get_tristate_value(sym);
852		if (sym_is_choice_value(sym) && val == yes) {
853			item_make(menu, ':', "   ");
854		} else {
855			switch (type) {
856			case S_BOOLEAN:
857				if (sym_is_changable(sym))
858					item_make(menu, 't', "[%c]",
859						val == no ? ' ' : '*');
860				else
861					item_make(menu, 't', "-%c-",
862						val == no ? ' ' : '*');
863				break;
864			case S_TRISTATE:
865				switch (val) {
866				case yes:
867					ch = '*';
868					break;
869				case mod:
870					ch = 'M';
871					break;
872				default:
873					ch = ' ';
874					break;
875				}
876				if (sym_is_changable(sym)) {
877					if (sym->rev_dep.tri == mod)
878						item_make(menu,
879							't', "{%c}", ch);
880					else
881						item_make(menu,
882							't', "<%c>", ch);
883				} else
884					item_make(menu, 't', "-%c-", ch);
885				break;
886			default:
887				tmp = 2 + strlen(sym_get_string_value(sym));
888				item_make(menu, 's', "    (%s)",
889						sym_get_string_value(sym));
890				tmp = indent - tmp + 4;
891				if (tmp < 0)
892					tmp = 0;
893				item_add_str("%*c%s%s", tmp, ' ',
894						_(menu_get_prompt(menu)),
895						(sym_has_value(sym) ||
896						 !sym_is_changable(sym)) ? "" :
897						_(" (NEW)"));
898				goto conf_childs;
899			}
900		}
901		item_add_str("%*c%s%s", indent + 1, ' ',
902				_(menu_get_prompt(menu)),
903				(sym_has_value(sym) || !sym_is_changable(sym)) ?
904				"" : _(" (NEW)"));
905		if (menu->prompt && menu->prompt->type == P_MENU) {
906			item_add_str("  --->");
907			return;
908		}
909	}
910
911conf_childs:
912	indent += doint;
913	for (child = menu->list; child; child = child->next)
914		build_conf(child);
915	indent -= doint;
916}
917
918static void reset_menu(void)
919{
920	unpost_menu(curses_menu);
921	clean_items();
922}
923
924/* adjust the menu to show this item.
925 * prefer not to scroll the menu if possible*/
926static void center_item(int selected_index, int *last_top_row)
927{
928	int toprow;
929
930	set_top_row(curses_menu, *last_top_row);
931	toprow = top_row(curses_menu);
932	if (selected_index < toprow ||
933	    selected_index >= toprow+mwin_max_lines) {
934		toprow = max(selected_index-mwin_max_lines/2, 0);
935		if (toprow >= item_count(curses_menu)-mwin_max_lines)
936			toprow = item_count(curses_menu)-mwin_max_lines;
937		set_top_row(curses_menu, toprow);
938	}
939	set_current_item(curses_menu,
940			curses_menu_items[selected_index]);
941	*last_top_row = toprow;
942	post_menu(curses_menu);
943	refresh_all_windows(main_window);
944}
945
946/* this function assumes reset_menu has been called before */
947static void show_menu(const char *prompt, const char *instructions,
948		int selected_index, int *last_top_row)
949{
950	int maxx, maxy;
951	WINDOW *menu_window;
952
953	current_instructions = instructions;
954
955	clear();
956	(void) wattrset(main_window, attributes[NORMAL]);
957	print_in_middle(stdscr, 1, 0, COLS,
958			menu_backtitle,
959			attributes[MAIN_HEADING]);
960
961	(void) wattrset(main_window, attributes[MAIN_MENU_BOX]);
962	box(main_window, 0, 0);
963	(void) wattrset(main_window, attributes[MAIN_MENU_HEADING]);
964	mvwprintw(main_window, 0, 3, " %s ", prompt);
965	(void) wattrset(main_window, attributes[NORMAL]);
966
967	set_menu_items(curses_menu, curses_menu_items);
968
969	/* position the menu at the middle of the screen */
970	scale_menu(curses_menu, &maxy, &maxx);
971	maxx = min(maxx, mwin_max_cols-2);
972	maxy = mwin_max_lines;
973	menu_window = derwin(main_window,
974			maxy,
975			maxx,
976			2,
977			(mwin_max_cols-maxx)/2);
978	keypad(menu_window, TRUE);
979	set_menu_win(curses_menu, menu_window);
980	set_menu_sub(curses_menu, menu_window);
981
982	/* must reassert this after changing items, otherwise returns to a
983	 * default of 16
984	 */
985	set_menu_format(curses_menu, maxy, 1);
986	center_item(selected_index, last_top_row);
987	set_menu_format(curses_menu, maxy, 1);
988
989	print_function_line();
990
991	/* Post the menu */
992	post_menu(curses_menu);
993	refresh_all_windows(main_window);
994}
995
996static void adj_match_dir(match_f *match_direction)
997{
998	if (*match_direction == FIND_NEXT_MATCH_DOWN)
999		*match_direction =
1000			MATCH_TINKER_PATTERN_DOWN;
1001	else if (*match_direction == FIND_NEXT_MATCH_UP)
1002		*match_direction =
1003			MATCH_TINKER_PATTERN_UP;
1004	/* else, do no change.. */
1005}
1006
1007struct match_state
1008{
1009	int in_search;
1010	match_f match_direction;
1011	char pattern[256];
1012};
1013
1014/* Return 0 means I have handled the key. In such a case, ans should hold the
1015 * item to center, or -1 otherwise.
1016 * Else return -1 .
1017 */
1018static int do_match(int key, struct match_state *state, int *ans)
1019{
1020	char c = (char) key;
1021	int terminate_search = 0;
1022	*ans = -1;
1023	if (key == '/' || (state->in_search && key == 27)) {
1024		move(0, 0);
1025		refresh();
1026		clrtoeol();
1027		state->in_search = 1-state->in_search;
1028		bzero(state->pattern, sizeof(state->pattern));
1029		state->match_direction = MATCH_TINKER_PATTERN_DOWN;
1030		return 0;
1031	} else if (!state->in_search)
1032		return 1;
1033
1034	if (isalnum(c) || isgraph(c) || c == ' ') {
1035		state->pattern[strlen(state->pattern)] = c;
1036		state->pattern[strlen(state->pattern)] = '\0';
1037		adj_match_dir(&state->match_direction);
1038		*ans = get_mext_match(state->pattern,
1039				state->match_direction);
1040	} else if (key == KEY_DOWN) {
1041		state->match_direction = FIND_NEXT_MATCH_DOWN;
1042		*ans = get_mext_match(state->pattern,
1043				state->match_direction);
1044	} else if (key == KEY_UP) {
1045		state->match_direction = FIND_NEXT_MATCH_UP;
1046		*ans = get_mext_match(state->pattern,
1047				state->match_direction);
1048	} else if (key == KEY_BACKSPACE || key == 127) {
1049		state->pattern[strlen(state->pattern)-1] = '\0';
1050		adj_match_dir(&state->match_direction);
1051	} else
1052		terminate_search = 1;
1053
1054	if (terminate_search) {
1055		state->in_search = 0;
1056		bzero(state->pattern, sizeof(state->pattern));
1057		move(0, 0);
1058		refresh();
1059		clrtoeol();
1060		return -1;
1061	}
1062	return 0;
1063}
1064
1065static void conf(struct menu *menu)
1066{
1067	struct menu *submenu = 0;
1068	const char *prompt = menu_get_prompt(menu);
1069	struct symbol *sym;
1070	int res;
1071	int current_index = 0;
1072	int last_top_row = 0;
1073	struct match_state match_state = {
1074		.in_search = 0,
1075		.match_direction = MATCH_TINKER_PATTERN_DOWN,
1076		.pattern = "",
1077	};
1078
1079	while (!global_exit) {
1080		reset_menu();
1081		current_menu = menu;
1082		build_conf(menu);
1083		if (!child_count)
1084			break;
1085
1086		show_menu(prompt ? _(prompt) : _("Main Menu"),
1087				_(menu_instructions),
1088				current_index, &last_top_row);
1089		keypad((menu_win(curses_menu)), TRUE);
1090		while (!global_exit) {
1091			if (match_state.in_search) {
1092				mvprintw(0, 0,
1093					"searching: %s", match_state.pattern);
1094				clrtoeol();
1095			}
1096			refresh_all_windows(main_window);
1097			res = wgetch(menu_win(curses_menu));
1098			if (!res)
1099				break;
1100			if (do_match(res, &match_state, &current_index) == 0) {
1101				if (current_index != -1)
1102					center_item(current_index,
1103						    &last_top_row);
1104				continue;
1105			}
1106			if (process_special_keys(&res,
1107						(struct menu *) item_data()))
1108				break;
1109			switch (res) {
1110			case KEY_DOWN:
1111				menu_driver(curses_menu, REQ_DOWN_ITEM);
1112				break;
1113			case KEY_UP:
1114				menu_driver(curses_menu, REQ_UP_ITEM);
1115				break;
1116			case KEY_NPAGE:
1117				menu_driver(curses_menu, REQ_SCR_DPAGE);
1118				break;
1119			case KEY_PPAGE:
1120				menu_driver(curses_menu, REQ_SCR_UPAGE);
1121				break;
1122			case KEY_HOME:
1123				menu_driver(curses_menu, REQ_FIRST_ITEM);
1124				break;
1125			case KEY_END:
1126				menu_driver(curses_menu, REQ_LAST_ITEM);
1127				break;
1128			case 'h':
1129			case '?':
1130				show_help((struct menu *) item_data());
1131				break;
1132			}
1133			if (res == 10 || res == 27 ||
1134				res == 32 || res == 'n' || res == 'y' ||
1135				res == KEY_LEFT || res == KEY_RIGHT ||
1136				res == 'm')
1137				break;
1138			refresh_all_windows(main_window);
1139		}
1140
1141		refresh_all_windows(main_window);
1142		/* if ESC or left*/
1143		if (res == 27 || (menu != &rootmenu && res == KEY_LEFT))
1144			break;
1145
1146		/* remember location in the menu */
1147		last_top_row = top_row(curses_menu);
1148		current_index = curses_item_index();
1149
1150		if (!item_tag())
1151			continue;
1152
1153		submenu = (struct menu *) item_data();
1154		if (!submenu || !menu_is_visible(submenu))
1155			continue;
1156		sym = submenu->sym;
1157
1158		switch (res) {
1159		case ' ':
1160			if (item_is_tag('t'))
1161				sym_toggle_tristate_value(sym);
1162			else if (item_is_tag('m'))
1163				conf(submenu);
1164			break;
1165		case KEY_RIGHT:
1166		case 10: /* ENTER WAS PRESSED */
1167			switch (item_tag()) {
1168			case 'm':
1169				if (single_menu_mode)
1170					submenu->data =
1171						(void *) (long) !submenu->data;
1172				else
1173					conf(submenu);
1174				break;
1175			case 't':
1176				if (sym_is_choice(sym) &&
1177				    sym_get_tristate_value(sym) == yes)
1178					conf_choice(submenu);
1179				else if (submenu->prompt &&
1180					 submenu->prompt->type == P_MENU)
1181					conf(submenu);
1182				else if (res == 10)
1183					sym_toggle_tristate_value(sym);
1184				break;
1185			case 's':
1186				conf_string(submenu);
1187				break;
1188			}
1189			break;
1190		case 'y':
1191			if (item_is_tag('t')) {
1192				if (sym_set_tristate_value(sym, yes))
1193					break;
1194				if (sym_set_tristate_value(sym, mod))
1195					btn_dialog(main_window, setmod_text, 0);
1196			}
1197			break;
1198		case 'n':
1199			if (item_is_tag('t'))
1200				sym_set_tristate_value(sym, no);
1201			break;
1202		case 'm':
1203			if (item_is_tag('t'))
1204				sym_set_tristate_value(sym, mod);
1205			break;
1206		}
1207	}
1208}
1209
1210static void conf_message_callback(const char *fmt, va_list ap)
1211{
1212	char buf[1024];
1213
1214	vsnprintf(buf, sizeof(buf), fmt, ap);
1215	btn_dialog(main_window, buf, 1, "<OK>");
1216}
1217
1218static void show_help(struct menu *menu)
1219{
1220	struct gstr help;
1221
1222	if (!menu)
1223		return;
1224
1225	help = str_new();
1226	menu_get_ext_help(menu, &help);
1227	show_scroll_win(main_window, _(menu_get_prompt(menu)), str_get(&help));
1228	str_free(&help);
1229}
1230
1231static void conf_choice(struct menu *menu)
1232{
1233	const char *prompt = _(menu_get_prompt(menu));
1234	struct menu *child = 0;
1235	struct symbol *active;
1236	int selected_index = 0;
1237	int last_top_row = 0;
1238	int res, i = 0;
1239	struct match_state match_state = {
1240		.in_search = 0,
1241		.match_direction = MATCH_TINKER_PATTERN_DOWN,
1242		.pattern = "",
1243	};
1244
1245	active = sym_get_choice_value(menu->sym);
1246	/* this is mostly duplicated from the conf() function. */
1247	while (!global_exit) {
1248		reset_menu();
1249
1250		for (i = 0, child = menu->list; child; child = child->next) {
1251			if (!show_all_items && !menu_is_visible(child))
1252				continue;
1253
1254			if (child->sym == sym_get_choice_value(menu->sym))
1255				item_make(child, ':', "<X> %s",
1256						_(menu_get_prompt(child)));
1257			else if (child->sym)
1258				item_make(child, ':', "    %s",
1259						_(menu_get_prompt(child)));
1260			else
1261				item_make(child, ':', "*** %s ***",
1262						_(menu_get_prompt(child)));
1263
1264			if (child->sym == active){
1265				last_top_row = top_row(curses_menu);
1266				selected_index = i;
1267			}
1268			i++;
1269		}
1270		show_menu(prompt ? _(prompt) : _("Choice Menu"),
1271				_(radiolist_instructions),
1272				selected_index,
1273				&last_top_row);
1274		while (!global_exit) {
1275			if (match_state.in_search) {
1276				mvprintw(0, 0, "searching: %s",
1277					 match_state.pattern);
1278				clrtoeol();
1279			}
1280			refresh_all_windows(main_window);
1281			res = wgetch(menu_win(curses_menu));
1282			if (!res)
1283				break;
1284			if (do_match(res, &match_state, &selected_index) == 0) {
1285				if (selected_index != -1)
1286					center_item(selected_index,
1287						    &last_top_row);
1288				continue;
1289			}
1290			if (process_special_keys(
1291						&res,
1292						(struct menu *) item_data()))
1293				break;
1294			switch (res) {
1295			case KEY_DOWN:
1296				menu_driver(curses_menu, REQ_DOWN_ITEM);
1297				break;
1298			case KEY_UP:
1299				menu_driver(curses_menu, REQ_UP_ITEM);
1300				break;
1301			case KEY_NPAGE:
1302				menu_driver(curses_menu, REQ_SCR_DPAGE);
1303				break;
1304			case KEY_PPAGE:
1305				menu_driver(curses_menu, REQ_SCR_UPAGE);
1306				break;
1307			case KEY_HOME:
1308				menu_driver(curses_menu, REQ_FIRST_ITEM);
1309				break;
1310			case KEY_END:
1311				menu_driver(curses_menu, REQ_LAST_ITEM);
1312				break;
1313			case 'h':
1314			case '?':
1315				show_help((struct menu *) item_data());
1316				break;
1317			}
1318			if (res == 10 || res == 27 || res == ' ' ||
1319					res == KEY_LEFT){
1320				break;
1321			}
1322			refresh_all_windows(main_window);
1323		}
1324		/* if ESC or left */
1325		if (res == 27 || res == KEY_LEFT)
1326			break;
1327
1328		child = item_data();
1329		if (!child || !menu_is_visible(child) || !child->sym)
1330			continue;
1331		switch (res) {
1332		case ' ':
1333		case  10:
1334		case KEY_RIGHT:
1335			sym_set_tristate_value(child->sym, yes);
1336			return;
1337		case 'h':
1338		case '?':
1339			show_help(child);
1340			active = child->sym;
1341			break;
1342		case KEY_EXIT:
1343			return;
1344		}
1345	}
1346}
1347
1348static void conf_string(struct menu *menu)
1349{
1350	const char *prompt = menu_get_prompt(menu);
1351
1352	while (1) {
1353		int res;
1354		const char *heading;
1355
1356		switch (sym_get_type(menu->sym)) {
1357		case S_INT:
1358			heading = _(inputbox_instructions_int);
1359			break;
1360		case S_HEX:
1361			heading = _(inputbox_instructions_hex);
1362			break;
1363		case S_STRING:
1364			heading = _(inputbox_instructions_string);
1365			break;
1366		default:
1367			heading = _("Internal nconf error!");
1368		}
1369		res = dialog_inputbox(main_window,
1370				prompt ? _(prompt) : _("Main Menu"),
1371				heading,
1372				sym_get_string_value(menu->sym),
1373				&dialog_input_result,
1374				&dialog_input_result_len);
1375		switch (res) {
1376		case 0:
1377			if (sym_set_string_value(menu->sym,
1378						dialog_input_result))
1379				return;
1380			btn_dialog(main_window,
1381				_("You have made an invalid entry."), 0);
1382			break;
1383		case 1:
1384			show_help(menu);
1385			break;
1386		case KEY_EXIT:
1387			return;
1388		}
1389	}
1390}
1391
1392static void conf_load(void)
1393{
1394	while (1) {
1395		int res;
1396		res = dialog_inputbox(main_window,
1397				NULL, load_config_text,
1398				filename,
1399				&dialog_input_result,
1400				&dialog_input_result_len);
1401		switch (res) {
1402		case 0:
1403			if (!dialog_input_result[0])
1404				return;
1405			if (!conf_read(dialog_input_result)) {
1406				set_config_filename(dialog_input_result);
1407				sym_set_change_count(1);
1408				return;
1409			}
1410			btn_dialog(main_window, _("File does not exist!"), 0);
1411			break;
1412		case 1:
1413			show_scroll_win(main_window,
1414					_("Load Alternate Configuration"),
1415					load_config_help);
1416			break;
1417		case KEY_EXIT:
1418			return;
1419		}
1420	}
1421}
1422
1423static void conf_save(void)
1424{
1425	while (1) {
1426		int res;
1427		res = dialog_inputbox(main_window,
1428				NULL, save_config_text,
1429				filename,
1430				&dialog_input_result,
1431				&dialog_input_result_len);
1432		switch (res) {
1433		case 0:
1434			if (!dialog_input_result[0])
1435				return;
1436			res = conf_write(dialog_input_result);
1437			if (!res) {
1438				set_config_filename(dialog_input_result);
1439				return;
1440			}
1441			btn_dialog(main_window, _("Can't create file! "
1442				"Probably a nonexistent directory."),
1443				1, "<OK>");
1444			break;
1445		case 1:
1446			show_scroll_win(main_window,
1447				_("Save Alternate Configuration"),
1448				save_config_help);
1449			break;
1450		case KEY_EXIT:
1451			return;
1452		}
1453	}
1454}
1455
1456void setup_windows(void)
1457{
1458	if (main_window != NULL)
1459		delwin(main_window);
1460
1461	/* set up the menu and menu window */
1462	main_window = newwin(LINES-2, COLS-2, 2, 1);
1463	keypad(main_window, TRUE);
1464	mwin_max_lines = LINES-7;
1465	mwin_max_cols = COLS-6;
1466
1467	/* panels order is from bottom to top */
1468	new_panel(main_window);
1469}
1470
1471int main(int ac, char **av)
1472{
1473	char *mode;
1474
1475	setlocale(LC_ALL, "");
1476	bindtextdomain(PACKAGE, LOCALEDIR);
1477	textdomain(PACKAGE);
1478
1479	conf_parse(av[1]);
1480	conf_read(NULL);
1481
1482	mode = getenv("NCONFIG_MODE");
1483	if (mode) {
1484		if (!strcasecmp(mode, "single_menu"))
1485			single_menu_mode = 1;
1486	}
1487
1488	/* Initialize curses */
1489	initscr();
1490	/* set color theme */
1491	set_colors();
1492
1493	cbreak();
1494	noecho();
1495	keypad(stdscr, TRUE);
1496	curs_set(0);
1497
1498	if (COLS < 75 || LINES < 20) {
1499		endwin();
1500		printf("Your terminal should have at "
1501			"least 20 lines and 75 columns\n");
1502		return 1;
1503	}
1504
1505	notimeout(stdscr, FALSE);
1506	ESCDELAY = 1;
1507
1508	/* set btns menu */
1509	curses_menu = new_menu(curses_menu_items);
1510	menu_opts_off(curses_menu, O_SHOWDESC);
1511	menu_opts_on(curses_menu, O_SHOWMATCH);
1512	menu_opts_on(curses_menu, O_ONEVALUE);
1513	menu_opts_on(curses_menu, O_NONCYCLIC);
1514	menu_opts_on(curses_menu, O_IGNORECASE);
1515	set_menu_mark(curses_menu, " ");
1516	set_menu_fore(curses_menu, attributes[MAIN_MENU_FORE]);
1517	set_menu_back(curses_menu, attributes[MAIN_MENU_BACK]);
1518	set_menu_grey(curses_menu, attributes[MAIN_MENU_GREY]);
1519
1520	set_config_filename(conf_get_configname());
1521	setup_windows();
1522
1523	/* check for KEY_FUNC(1) */
1524	if (has_key(KEY_F(1)) == FALSE) {
1525		show_scroll_win(main_window,
1526				_("Instructions"),
1527				_(menu_no_f_instructions));
1528	}
1529
1530	conf_set_message_callback(conf_message_callback);
1531	/* do the work */
1532	while (!global_exit) {
1533		conf(&rootmenu);
1534		if (!global_exit && do_exit() == 0)
1535			break;
1536	}
1537	/* ok, we are done */
1538	unpost_menu(curses_menu);
1539	free_menu(curses_menu);
1540	delwin(main_window);
1541	clear();
1542	refresh();
1543	endwin();
1544	return 0;
1545}
1546
1547