nconf.c 38.5 KB
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/*
 * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com?
 * Released under the terms of the GNU GPL v2.0.
 *
 * Derived from menuconfig.
 *
 */
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include "lkc.h"
#include "nconf.h"
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#include <ctype.h>
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static const char nconf_global_help[] = N_(
"Help windows\n"
"------------\n"
"o  Global help:  Unless in a data entry window, pressing <F1> will give \n"
"   you the global help window, which you are just reading.\n"
"\n"
"o  A short version of the global help is available by pressing <F3>.\n"
"\n"
"o  Local help:  To get help related to the current menu entry, use any\n"
"   of <?> <h>, or if in a data entry window then press <F1>.\n"
"\n"
"\n"
"Menu entries\n"
"------------\n"
"This interface lets you select features and parameters for the kernel\n"
"build.  Kernel features can either be built-in, modularized, or removed.\n"
"Parameters must be entered as text or decimal or hexadecimal numbers.\n"
"\n"
"Menu entries beginning with following braces represent features that\n"
"  [ ]  can be built in or removed\n"
"  < >  can be built in, modularized or removed\n"
"  { }  can be built in or modularized, are selected by another feature\n"
"  - -  are selected by another feature\n"
"  XXX  cannot be selected.  Symbol Info <F2> tells you why.\n"
"*, M or whitespace inside braces means to build in, build as a module\n"
"or to exclude the feature respectively.\n"
"\n"
"To change any of these features, highlight it with the movement keys\n"
"listed below and press <y> to build it in, <m> to make it a module or\n"
"<n> to remove it.  You may press the <Space> key to cycle through the\n"
"available options.\n"
"\n"
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"A trailing \"--->\" designates a submenu, a trailing \"----\" an\n"
"empty submenu.\n"
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"\n"
"Menu navigation keys\n"
"----------------------------------------------------------------------\n"
"Linewise up                 <Up>\n"
"Linewise down               <Down>\n"
"Pagewise up                 <Page Up>\n"
"Pagewise down               <Page Down>\n"
"First entry                 <Home>\n"
"Last entry                  <End>\n"
"Enter a submenu             <Right>  <Enter>\n"
"Go back to parent menu      <Left>   <Esc>  <F5>\n"
"Close a help window         <Enter>  <Esc>  <F5>\n"
"Close entry window, apply   <Enter>\n"
"Close entry window, forget  <Esc>  <F5>\n"
"Start incremental, case-insensitive search for STRING in menu entries,\n"
"    no regex support, STRING is displayed in upper left corner\n"
"                            </>STRING\n"
"    Remove last character   <Backspace>\n"
"    Jump to next hit        <Down>\n"
"    Jump to previous hit    <Up>\n"
"Exit menu search mode       </>  <Esc>\n"
"Search for configuration variables with or without leading CONFIG_\n"
"                            <F8>RegExpr<Enter>\n"
"Verbose search help         <F8><F1>\n"
"----------------------------------------------------------------------\n"
"\n"
"Unless in a data entry window, key <1> may be used instead of <F1>,\n"
"<2> instead of <F2>, etc.\n"
"\n"
"\n"
"Radiolist (Choice list)\n"
"-----------------------\n"
"Use the movement keys listed above to select the option you wish to set\n"
"and press <Space>.\n"
"\n"
"\n"
"Data entry\n"
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"----------\n"
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"Enter the requested information and press <Enter>.  Hexadecimal values\n"
"may be entered without the \"0x\" prefix.\n"
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"\n"
"\n"
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"Text Box (Help Window)\n"
"----------------------\n"
"Use movement keys as listed in table above.\n"
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"\n"
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"Press any of <Enter> <Esc> <q> <F5> <F9> to exit.\n"
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"\n"
"\n"
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"Alternate configuration files\n"
"-----------------------------\n"
"nconfig supports switching between different configurations.\n"
"Press <F6> to save your current configuration.  Press <F7> and enter\n"
"a file name to load a previously saved configuration.\n"
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"\n"
"\n"
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"Terminal configuration\n"
"----------------------\n"
"If you use nconfig in a xterm window, make sure your TERM environment\n"
"variable specifies a terminal configuration which supports at least\n"
"16 colors.  Otherwise nconfig will look rather bad.\n"
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"\n"
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"If the \"stty size\" command reports the current terminalsize correctly,\n"
"nconfig will adapt to sizes larger than the traditional 80x25 \"standard\"\n"
"and display longer menus properly.\n"
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"\n"
"\n"
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"Single menu mode\n"
"----------------\n"
"If you prefer to have all of the menu entries listed in a single menu,\n"
"rather than the default multimenu hierarchy, run nconfig with\n"
"NCONFIG_MODE environment variable set to single_menu.  Example:\n"
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"\n"
"make NCONFIG_MODE=single_menu nconfig\n"
"\n"
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"<Enter> will then unfold the appropriate category, or fold it if it\n"
"is already unfolded.  Folded menu entries will be designated by a\n"
"leading \"++>\" and unfolded entries by a leading \"-->\".\n"
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"\n"
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"Note that this mode can eventually be a little more CPU expensive than\n"
"the default mode, especially with a larger number of unfolded submenus.\n"
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"\n"),
menu_no_f_instructions[] = N_(
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"Legend:  [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
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"Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
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"\n"
"Use the following keys to navigate the menus:\n"
"Move up or down with <Up> and <Down>.\n"
"Enter a submenu with <Enter> or <Right>.\n"
"Exit a submenu to its parent menu with <Esc> or <Left>.\n"
"Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
"Pressing <Space> cycles through the available options.\n"
"To search for menu entries press </>.\n"
"<Esc> always leaves the current window.\n"
"\n"
"You do not have function keys support.\n"
"Press <1> instead of <F1>, <2> instead of <F2>, etc.\n"
"For verbose global help use key <1>.\n"
"For help related to the current menu entry press <?> or <h>.\n"),
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menu_instructions[] = N_(
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"Legend:  [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
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"Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
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"\n"
"Use the following keys to navigate the menus:\n"
"Move up or down with <Up> or <Down>.\n"
"Enter a submenu with <Enter> or <Right>.\n"
"Exit a submenu to its parent menu with <Esc> or <Left>.\n"
"Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
"Pressing <Space> cycles through the available options.\n"
"To search for menu entries press </>.\n"
"<Esc> always leaves the current window.\n"
"\n"
"Pressing <1> may be used instead of <F1>, <2> instead of <F2>, etc.\n"
"For verbose global help press <F1>.\n"
"For help related to the current menu entry press <?> or <h>.\n"),
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radiolist_instructions[] = N_(
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"Press <Up>, <Down>, <Home> or <End> to navigate a radiolist, select\n"
"with <Space>.\n"
"For help related to the current entry press <?> or <h>.\n"
"For global help press <F1>.\n"),
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inputbox_instructions_int[] = N_(
"Please enter a decimal value.\n"
"Fractions will not be accepted.\n"
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"Press <Enter> to apply, <Esc> to cancel."),
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inputbox_instructions_hex[] = N_(
"Please enter a hexadecimal value.\n"
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"Press <Enter> to apply, <Esc> to cancel."),
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inputbox_instructions_string[] = N_(
"Please enter a string value.\n"
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"Press <Enter> to apply, <Esc> to cancel."),
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setmod_text[] = N_(
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"This feature depends on another feature which has been configured as a\n"
"module.  As a result, the current feature will be built as a module too."),
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load_config_text[] = N_(
"Enter the name of the configuration file you wish to load.\n"
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"Accept the name shown to restore the configuration you last\n"
"retrieved.  Leave empty to abort."),
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load_config_help[] = N_(
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"For various reasons, one may wish to keep several different\n"
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"configurations available on a single machine.\n"
"\n"
"If you have saved a previous configuration in a file other than the\n"
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"default one, entering its name here will allow you to load and modify\n"
"that configuration.\n"
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"\n"
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"Leave empty to abort.\n"),
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save_config_text[] = N_(
"Enter a filename to which this configuration should be saved\n"
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"as an alternate.  Leave empty to abort."),
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save_config_help[] = N_(
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"For various reasons, one may wish to keep several different\n"
"configurations available on a single machine.\n"
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"\n"
"Entering a file name here will allow you to later retrieve, modify\n"
"and use the current configuration as an alternate to whatever\n"
"configuration options you have selected at that time.\n"
"\n"
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"Leave empty to abort.\n"),
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search_help[] = N_(
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"Search for symbols (configuration variable names CONFIG_*) and display\n"
"their relations.  Regular expressions are supported.\n"
"Example:  Search for \"^FOO\".\n"
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"Result:\n"
"-----------------------------------------------------------------\n"
"Symbol: FOO [ = m]\n"
"Prompt: Foo bus is used to drive the bar HW\n"
"Defined at drivers/pci/Kconfig:47\n"
"Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
"Location:\n"
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"  -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
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"    -> PCI support (PCI [ = y])\n"
"      -> PCI access mode (<choice> [ = y])\n"
"Selects: LIBCRC32\n"
"Selected by: BAR\n"
"-----------------------------------------------------------------\n"
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"o  The line 'Prompt:' shows the text displayed for this symbol in\n"
"   the menu hierarchy.\n"
"o  The 'Defined at' line tells at what file / line number the symbol is\n"
"   defined.\n"
"o  The 'Depends on:' line lists symbols that need to be defined for\n"
"   this symbol to be visible and selectable in the menu.\n"
"o  The 'Location:' lines tell, where in the menu structure this symbol\n"
"   is located.  A location followed by a [ = y] indicates that this is\n"
"   a selectable menu item, and the current value is displayed inside\n"
"   brackets.\n"
"o  The 'Selects:' line tells, what symbol will be automatically selected\n"
"   if this symbol is selected (y or m).\n"
"o  The 'Selected by' line tells what symbol has selected this symbol.\n"
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"\n"
"Only relevant lines are shown.\n"
"\n\n"
"Search examples:\n"
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"USB  => find all symbols containing USB\n"
"^USB => find all symbols starting with USB\n"
"USB$ => find all symbols ending with USB\n"
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"\n");

struct mitem {
	char str[256];
	char tag;
	void *usrptr;
	int is_visible;
};

#define MAX_MENU_ITEMS 4096
static int show_all_items;
static int indent;
static struct menu *current_menu;
static int child_count;
static int single_menu_mode;
/* the window in which all information appears */
static WINDOW *main_window;
/* the largest size of the menu window */
static int mwin_max_lines;
static int mwin_max_cols;
/* the window in which we show option buttons */
static MENU *curses_menu;
static ITEM *curses_menu_items[MAX_MENU_ITEMS];
static struct mitem k_menu_items[MAX_MENU_ITEMS];
static int items_num;
static int global_exit;
/* the currently selected button */
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static const char *current_instructions = menu_instructions;
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static char *dialog_input_result;
static int dialog_input_result_len;

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static void conf(struct menu *menu);
static void conf_choice(struct menu *menu);
static void conf_string(struct menu *menu);
static void conf_load(void);
static void conf_save(void);
static void show_help(struct menu *menu);
static int do_exit(void);
static void setup_windows(void);
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static void search_conf(void);
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typedef void (*function_key_handler_t)(int *key, struct menu *menu);
static void handle_f1(int *key, struct menu *current_item);
static void handle_f2(int *key, struct menu *current_item);
static void handle_f3(int *key, struct menu *current_item);
static void handle_f4(int *key, struct menu *current_item);
static void handle_f5(int *key, struct menu *current_item);
static void handle_f6(int *key, struct menu *current_item);
static void handle_f7(int *key, struct menu *current_item);
static void handle_f8(int *key, struct menu *current_item);
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static void handle_f9(int *key, struct menu *current_item);
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struct function_keys {
	const char *key_str;
	const char *func;
	function_key key;
	function_key_handler_t handler;
};

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static const int function_keys_num = 9;
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static struct function_keys function_keys[] = {
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	{
		.key_str = "F1",
		.func = "Help",
		.key = F_HELP,
		.handler = handle_f1,
	},
	{
		.key_str = "F2",
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		.func = "SymInfo",
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		.key = F_SYMBOL,
		.handler = handle_f2,
	},
	{
		.key_str = "F3",
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		.func = "Help 2",
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		.key = F_INSTS,
		.handler = handle_f3,
	},
	{
		.key_str = "F4",
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		.func = "ShowAll",
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		.key = F_CONF,
		.handler = handle_f4,
	},
	{
		.key_str = "F5",
		.func = "Back",
		.key = F_BACK,
		.handler = handle_f5,
	},
	{
		.key_str = "F6",
		.func = "Save",
		.key = F_SAVE,
		.handler = handle_f6,
	},
	{
		.key_str = "F7",
		.func = "Load",
		.key = F_LOAD,
		.handler = handle_f7,
	},
	{
		.key_str = "F8",
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		.func = "SymSearch",
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		.key = F_SEARCH,
		.handler = handle_f8,
	},
	{
		.key_str = "F9",
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		.func = "Exit",
		.key = F_EXIT,
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		.handler = handle_f9,
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	},
};

static void print_function_line(void)
{
	int i;
	int offset = 1;
	const int skip = 1;
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	int lines = getmaxy(stdscr);
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	for (i = 0; i < function_keys_num; i++) {
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		(void) wattrset(main_window, attributes[FUNCTION_HIGHLIGHT]);
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		mvwprintw(main_window, lines-3, offset,
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				"%s",
				function_keys[i].key_str);
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		(void) wattrset(main_window, attributes[FUNCTION_TEXT]);
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		offset += strlen(function_keys[i].key_str);
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		mvwprintw(main_window, lines-3,
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				offset, "%s",
				function_keys[i].func);
		offset += strlen(function_keys[i].func) + skip;
	}
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	(void) wattrset(main_window, attributes[NORMAL]);
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}

/* help */
static void handle_f1(int *key, struct menu *current_item)
{
	show_scroll_win(main_window,
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			_("Global help"), _(nconf_global_help));
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	return;
}

/* symbole help */
static void handle_f2(int *key, struct menu *current_item)
{
	show_help(current_item);
	return;
}

/* instructions */
static void handle_f3(int *key, struct menu *current_item)
{
	show_scroll_win(main_window,
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			_("Short help"),
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			_(current_instructions));
	return;
}

/* config */
static void handle_f4(int *key, struct menu *current_item)
{
	int res = btn_dialog(main_window,
			_("Show all symbols?"),
			2,
			"   <Show All>   ",
			"<Don't show all>");
	if (res == 0)
		show_all_items = 1;
	else if (res == 1)
		show_all_items = 0;

	return;
}

/* back */
static void handle_f5(int *key, struct menu *current_item)
{
	*key = KEY_LEFT;
	return;
}

/* save */
static void handle_f6(int *key, struct menu *current_item)
{
	conf_save();
	return;
}

/* load */
static void handle_f7(int *key, struct menu *current_item)
{
	conf_load();
	return;
}

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/* search */
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static void handle_f8(int *key, struct menu *current_item)
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{
	search_conf();
	return;
}

/* exit */
static void handle_f9(int *key, struct menu *current_item)
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{
	do_exit();
	return;
}

/* return != 0 to indicate the key was handles */
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static int process_special_keys(int *key, struct menu *menu)
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{
	int i;

	if (*key == KEY_RESIZE) {
		setup_windows();
		return 1;
	}

	for (i = 0; i < function_keys_num; i++) {
		if (*key == KEY_F(function_keys[i].key) ||
		    *key == '0' + function_keys[i].key){
			function_keys[i].handler(key, menu);
			return 1;
		}
	}

	return 0;
}

static void clean_items(void)
{
	int i;
	for (i = 0; curses_menu_items[i]; i++)
		free_item(curses_menu_items[i]);
	bzero(curses_menu_items, sizeof(curses_menu_items));
	bzero(k_menu_items, sizeof(k_menu_items));
	items_num = 0;
}

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typedef enum {MATCH_TINKER_PATTERN_UP, MATCH_TINKER_PATTERN_DOWN,
	FIND_NEXT_MATCH_DOWN, FIND_NEXT_MATCH_UP} match_f;
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/* return the index of the matched item, or -1 if no such item exists */
static int get_mext_match(const char *match_str, match_f flag)
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{
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	int match_start = item_index(current_item(curses_menu));
	int index;

	if (flag == FIND_NEXT_MATCH_DOWN)
		++match_start;
	else if (flag == FIND_NEXT_MATCH_UP)
		--match_start;

	index = match_start;
	index = (index + items_num) % items_num;
	while (true) {
		char *str = k_menu_items[index].str;
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		if (strcasestr(str, match_str) != NULL)
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			return index;
		if (flag == FIND_NEXT_MATCH_UP ||
		    flag == MATCH_TINKER_PATTERN_UP)
			--index;
		else
			++index;
		index = (index + items_num) % items_num;
		if (index == match_start)
			return -1;
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	}
}

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/* Make a new item. */
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static void item_make(struct menu *menu, char tag, const char *fmt, ...)
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{
	va_list ap;

	if (items_num > MAX_MENU_ITEMS-1)
		return;

	bzero(&k_menu_items[items_num], sizeof(k_menu_items[0]));
	k_menu_items[items_num].tag = tag;
	k_menu_items[items_num].usrptr = menu;
	if (menu != NULL)
		k_menu_items[items_num].is_visible =
			menu_is_visible(menu);
	else
		k_menu_items[items_num].is_visible = 1;

	va_start(ap, fmt);
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	vsnprintf(k_menu_items[items_num].str,
		  sizeof(k_menu_items[items_num].str),
		  fmt, ap);
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	va_end(ap);
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	if (!k_menu_items[items_num].is_visible)
		memcpy(k_menu_items[items_num].str, "XXX", 3);
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	curses_menu_items[items_num] = new_item(
			k_menu_items[items_num].str,
			k_menu_items[items_num].str);
	set_item_userptr(curses_menu_items[items_num],
			&k_menu_items[items_num]);
	/*
	if (!k_menu_items[items_num].is_visible)
		item_opts_off(curses_menu_items[items_num], O_SELECTABLE);
	*/

	items_num++;
	curses_menu_items[items_num] = NULL;
}

/* very hackish. adds a string to the last item added */
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static void item_add_str(const char *fmt, ...)
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{
	va_list ap;
	int index = items_num-1;
	char new_str[256];
	char tmp_str[256];

	if (index < 0)
		return;

	va_start(ap, fmt);
	vsnprintf(new_str, sizeof(new_str), fmt, ap);
	va_end(ap);
	snprintf(tmp_str, sizeof(tmp_str), "%s%s",
			k_menu_items[index].str, new_str);
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	strncpy(k_menu_items[index].str,
		tmp_str,
		sizeof(k_menu_items[index].str));
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	free_item(curses_menu_items[index]);
	curses_menu_items[index] = new_item(
			k_menu_items[index].str,
			k_menu_items[index].str);
	set_item_userptr(curses_menu_items[index],
			&k_menu_items[index]);
}

/* get the tag of the currently selected item */
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static char item_tag(void)
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{
	ITEM *cur;
	struct mitem *mcur;

	cur = current_item(curses_menu);
	if (cur == NULL)
		return 0;
	mcur = (struct mitem *) item_userptr(cur);
	return mcur->tag;
}

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static int curses_item_index(void)
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{
	return  item_index(current_item(curses_menu));
}

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static void *item_data(void)
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{
	ITEM *cur;
	struct mitem *mcur;

	cur = current_item(curses_menu);
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	if (!cur)
		return NULL;
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	mcur = (struct mitem *) item_userptr(cur);
	return mcur->usrptr;

}

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static int item_is_tag(char tag)
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{
	return item_tag() == tag;
}

static char filename[PATH_MAX+1];
static char menu_backtitle[PATH_MAX+128];
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static const char *set_config_filename(const char *config_filename)
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{
	int size;

	size = snprintf(menu_backtitle, sizeof(menu_backtitle),
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			"%s - %s", config_filename, rootmenu.prompt->text);
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	if (size >= sizeof(menu_backtitle))
		menu_backtitle[sizeof(menu_backtitle)-1] = '\0';

	size = snprintf(filename, sizeof(filename), "%s", config_filename);
	if (size >= sizeof(filename))
		filename[sizeof(filename)-1] = '\0';
	return menu_backtitle;
}

/* return = 0 means we are successful.
 * -1 means go on doing what you were doing
 */
static int do_exit(void)
{
	int res;
	if (!conf_get_changed()) {
		global_exit = 1;
		return 0;
	}
	res = btn_dialog(main_window,
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			_("Do you wish to save your new configuration?\n"
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				"<ESC> to cancel and resume nconfig."),
			2,
			"   <save>   ",
			"<don't save>");
	if (res == KEY_EXIT) {
		global_exit = 0;
		return -1;
	}

	/* if we got here, the user really wants to exit */
	switch (res) {
	case 0:
		res = conf_write(filename);
		if (res)
			btn_dialog(
				main_window,
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				_("Error during writing of configuration.\n"
				  "Your configuration changes were NOT saved."),
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				  1,
				  "<OK>");
		break;
	default:
		btn_dialog(
			main_window,
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			_("Your configuration changes were NOT saved."),
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			1,
			"<OK>");
		break;
	}
	global_exit = 1;
	return 0;
}


static void search_conf(void)
{
	struct symbol **sym_arr;
	struct gstr res;
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	struct gstr title;
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	char *dialog_input;
	int dres;
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	title = str_new();
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	str_printf( &title, _("Enter (sub)string or regexp to search for "
			      "(with or without \"%s\")"), CONFIG_);
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again:
	dres = dialog_inputbox(main_window,
			_("Search Configuration Parameter"),
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			str_get(&title),
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			"", &dialog_input_result, &dialog_input_result_len);
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	switch (dres) {
	case 0:
		break;
	case 1:
		show_scroll_win(main_window,
				_("Search Configuration"), search_help);
		goto again;
	default:
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		str_free(&title);
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		return;
	}

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	/* strip the prefix if necessary */
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	dialog_input = dialog_input_result;
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	if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
		dialog_input += strlen(CONFIG_);
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	sym_arr = sym_re_search(dialog_input);
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	res = get_relations_str(sym_arr, NULL);
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	free(sym_arr);
	show_scroll_win(main_window,
			_("Search Results"), str_get(&res));
	str_free(&res);
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	str_free(&title);
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}


static void build_conf(struct menu *menu)
{
	struct symbol *sym;
	struct property *prop;
	struct menu *child;
	int type, tmp, doint = 2;
	tristate val;
	char ch;

	if (!menu || (!show_all_items && !menu_is_visible(menu)))
		return;

	sym = menu->sym;
	prop = menu->prompt;
	if (!sym) {
		if (prop && menu != current_menu) {
			const char *prompt = menu_get_prompt(menu);
			enum prop_type ptype;
			ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
			switch (ptype) {
			case P_MENU:
				child_count++;
				prompt = _(prompt);
				if (single_menu_mode) {
					item_make(menu, 'm',
						"%s%*c%s",
						menu->data ? "-->" : "++>",
						indent + 1, ' ', prompt);
				} else
					item_make(menu, 'm',
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						  "   %*c%s  %s",
						  indent + 1, ' ', prompt,
						  menu_is_empty(menu) ? "----" : "--->");
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				if (single_menu_mode && menu->data)
					goto conf_childs;
				return;
			case P_COMMENT:
				if (prompt) {
					child_count++;
					item_make(menu, ':',
						"   %*c*** %s ***",
						indent + 1, ' ',
						_(prompt));
				}
				break;
			default:
				if (prompt) {
					child_count++;
					item_make(menu, ':', "---%*c%s",
						indent + 1, ' ',
						_(prompt));
				}
			}
		} else
			doint = 0;
		goto conf_childs;
	}

	type = sym_get_type(sym);
	if (sym_is_choice(sym)) {
		struct symbol *def_sym = sym_get_choice_value(sym);
		struct menu *def_menu = NULL;

		child_count++;
		for (child = menu->list; child; child = child->next) {
			if (menu_is_visible(child) && child->sym == def_sym)
				def_menu = child;
		}

		val = sym_get_tristate_value(sym);
		if (sym_is_changable(sym)) {
			switch (type) {
			case S_BOOLEAN:
				item_make(menu, 't', "[%c]",
						val == no ? ' ' : '*');
				break;
			case S_TRISTATE:
				switch (val) {
				case yes:
					ch = '*';
					break;
				case mod:
					ch = 'M';
					break;
				default:
					ch = ' ';
					break;
				}
				item_make(menu, 't', "<%c>", ch);
				break;
			}
		} else {
			item_make(menu, def_menu ? 't' : ':', "   ");
		}

		item_add_str("%*c%s", indent + 1,
				' ', _(menu_get_prompt(menu)));
		if (val == yes) {
			if (def_menu) {
				item_add_str(" (%s)",
					_(menu_get_prompt(def_menu)));
				item_add_str("  --->");
				if (def_menu->list) {
					indent += 2;
					build_conf(def_menu);
					indent -= 2;
				}
			}
			return;
		}
	} else {
		if (menu == current_menu) {
			item_make(menu, ':',
				"---%*c%s", indent + 1,
				' ', _(menu_get_prompt(menu)));
			goto conf_childs;
		}
		child_count++;
		val = sym_get_tristate_value(sym);
		if (sym_is_choice_value(sym) && val == yes) {
			item_make(menu, ':', "   ");
		} else {
			switch (type) {
			case S_BOOLEAN:
				if (sym_is_changable(sym))
					item_make(menu, 't', "[%c]",
						val == no ? ' ' : '*');
				else
					item_make(menu, 't', "-%c-",
						val == no ? ' ' : '*');
				break;
			case S_TRISTATE:
				switch (val) {
				case yes:
					ch = '*';
					break;
				case mod:
					ch = 'M';
					break;
				default:
					ch = ' ';
					break;
				}
				if (sym_is_changable(sym)) {
					if (sym->rev_dep.tri == mod)
						item_make(menu,
							't', "{%c}", ch);
					else
						item_make(menu,
							't', "<%c>", ch);
				} else
					item_make(menu, 't', "-%c-", ch);
				break;
			default:
				tmp = 2 + strlen(sym_get_string_value(sym));
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				item_make(menu, 's', "    (%s)",
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						sym_get_string_value(sym));
				tmp = indent - tmp + 4;
				if (tmp < 0)
					tmp = 0;
				item_add_str("%*c%s%s", tmp, ' ',
						_(menu_get_prompt(menu)),
						(sym_has_value(sym) ||
						 !sym_is_changable(sym)) ? "" :
						_(" (NEW)"));
				goto conf_childs;
			}
		}
		item_add_str("%*c%s%s", indent + 1, ' ',
				_(menu_get_prompt(menu)),
				(sym_has_value(sym) || !sym_is_changable(sym)) ?
				"" : _(" (NEW)"));
		if (menu->prompt && menu->prompt->type == P_MENU) {
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			item_add_str("  %s", menu_is_empty(menu) ? "----" : "--->");
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			return;
		}
	}

conf_childs:
	indent += doint;
	for (child = menu->list; child; child = child->next)
		build_conf(child);
	indent -= doint;
}

static void reset_menu(void)
{
	unpost_menu(curses_menu);
	clean_items();
}

/* adjust the menu to show this item.
 * prefer not to scroll the menu if possible*/
static void center_item(int selected_index, int *last_top_row)
{
	int toprow;

	set_top_row(curses_menu, *last_top_row);
	toprow = top_row(curses_menu);
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	if (selected_index < toprow ||
	    selected_index >= toprow+mwin_max_lines) {
		toprow = max(selected_index-mwin_max_lines/2, 0);
		if (toprow >= item_count(curses_menu)-mwin_max_lines)
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			toprow = item_count(curses_menu)-mwin_max_lines;
		set_top_row(curses_menu, toprow);
	}
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	set_current_item(curses_menu,
			curses_menu_items[selected_index]);
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	*last_top_row = toprow;
	post_menu(curses_menu);
	refresh_all_windows(main_window);
}

/* this function assumes reset_menu has been called before */
static void show_menu(const char *prompt, const char *instructions,
		int selected_index, int *last_top_row)
{
	int maxx, maxy;
	WINDOW *menu_window;

	current_instructions = instructions;

	clear();
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	(void) wattrset(main_window, attributes[NORMAL]);
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	print_in_middle(stdscr, 1, 0, getmaxx(stdscr),
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			menu_backtitle,
			attributes[MAIN_HEADING]);

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	(void) wattrset(main_window, attributes[MAIN_MENU_BOX]);
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	box(main_window, 0, 0);
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	(void) wattrset(main_window, attributes[MAIN_MENU_HEADING]);
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	mvwprintw(main_window, 0, 3, " %s ", prompt);
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	(void) wattrset(main_window, attributes[NORMAL]);
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	set_menu_items(curses_menu, curses_menu_items);

	/* position the menu at the middle of the screen */
	scale_menu(curses_menu, &maxy, &maxx);
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	maxx = min(maxx, mwin_max_cols-2);
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	maxy = mwin_max_lines;
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	menu_window = derwin(main_window,
			maxy,
			maxx,
			2,
			(mwin_max_cols-maxx)/2);
	keypad(menu_window, TRUE);
	set_menu_win(curses_menu, menu_window);
	set_menu_sub(curses_menu, menu_window);

	/* must reassert this after changing items, otherwise returns to a
	 * default of 16
	 */
	set_menu_format(curses_menu, maxy, 1);
	center_item(selected_index, last_top_row);
	set_menu_format(curses_menu, maxy, 1);

	print_function_line();

	/* Post the menu */
	post_menu(curses_menu);
	refresh_all_windows(main_window);
}

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static void adj_match_dir(match_f *match_direction)
{
	if (*match_direction == FIND_NEXT_MATCH_DOWN)
		*match_direction =
			MATCH_TINKER_PATTERN_DOWN;
	else if (*match_direction == FIND_NEXT_MATCH_UP)
		*match_direction =
			MATCH_TINKER_PATTERN_UP;
	/* else, do no change.. */
}
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struct match_state
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{
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	int in_search;
	match_f match_direction;
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	char pattern[256];
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};

/* Return 0 means I have handled the key. In such a case, ans should hold the
 * item to center, or -1 otherwise.
 * Else return -1 .
 */
static int do_match(int key, struct match_state *state, int *ans)
{
	char c = (char) key;
	int terminate_search = 0;
	*ans = -1;
	if (key == '/' || (state->in_search && key == 27)) {
		move(0, 0);
		refresh();
		clrtoeol();
		state->in_search = 1-state->in_search;
		bzero(state->pattern, sizeof(state->pattern));
		state->match_direction = MATCH_TINKER_PATTERN_DOWN;
		return 0;
	} else if (!state->in_search)
		return 1;

	if (isalnum(c) || isgraph(c) || c == ' ') {
		state->pattern[strlen(state->pattern)] = c;
		state->pattern[strlen(state->pattern)] = '\0';
		adj_match_dir(&state->match_direction);
		*ans = get_mext_match(state->pattern,
				state->match_direction);
	} else if (key == KEY_DOWN) {
		state->match_direction = FIND_NEXT_MATCH_DOWN;
		*ans = get_mext_match(state->pattern,
				state->match_direction);
	} else if (key == KEY_UP) {
		state->match_direction = FIND_NEXT_MATCH_UP;
		*ans = get_mext_match(state->pattern,
				state->match_direction);
	} else if (key == KEY_BACKSPACE || key == 127) {
		state->pattern[strlen(state->pattern)-1] = '\0';
		adj_match_dir(&state->match_direction);
	} else
		terminate_search = 1;

	if (terminate_search) {
		state->in_search = 0;
		bzero(state->pattern, sizeof(state->pattern));
		move(0, 0);
		refresh();
		clrtoeol();
		return -1;
	}
	return 0;
}

static void conf(struct menu *menu)
{
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	struct menu *submenu = NULL;
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	const char *prompt = menu_get_prompt(menu);
	struct symbol *sym;
	int res;
	int current_index = 0;
	int last_top_row = 0;
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	struct match_state match_state = {
		.in_search = 0,
		.match_direction = MATCH_TINKER_PATTERN_DOWN,
		.pattern = "",
	};
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	while (!global_exit) {
		reset_menu();
		current_menu = menu;
		build_conf(menu);
		if (!child_count)
			break;

		show_menu(prompt ? _(prompt) : _("Main Menu"),
				_(menu_instructions),
				current_index, &last_top_row);
		keypad((menu_win(curses_menu)), TRUE);
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		while (!global_exit) {
			if (match_state.in_search) {
				mvprintw(0, 0,
					"searching: %s", match_state.pattern);
				clrtoeol();
			}
			refresh_all_windows(main_window);
			res = wgetch(menu_win(curses_menu));
			if (!res)
				break;
			if (do_match(res, &match_state, &current_index) == 0) {
				if (current_index != -1)
					center_item(current_index,
						    &last_top_row);
				continue;
			}
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			if (process_special_keys(&res,
						(struct menu *) item_data()))
				break;
			switch (res) {
			case KEY_DOWN:
				menu_driver(curses_menu, REQ_DOWN_ITEM);
				break;
			case KEY_UP:
				menu_driver(curses_menu, REQ_UP_ITEM);
				break;
			case KEY_NPAGE:
				menu_driver(curses_menu, REQ_SCR_DPAGE);
				break;
			case KEY_PPAGE:
				menu_driver(curses_menu, REQ_SCR_UPAGE);
				break;
			case KEY_HOME:
				menu_driver(curses_menu, REQ_FIRST_ITEM);
				break;
			case KEY_END:
				menu_driver(curses_menu, REQ_LAST_ITEM);
				break;
			case 'h':
			case '?':
				show_help((struct menu *) item_data());
				break;
			}
			if (res == 10 || res == 27 ||
				res == 32 || res == 'n' || res == 'y' ||
				res == KEY_LEFT || res == KEY_RIGHT ||
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				res == 'm')
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				break;
			refresh_all_windows(main_window);
		}

		refresh_all_windows(main_window);
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		/* if ESC or left*/
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		if (res == 27 || (menu != &rootmenu && res == KEY_LEFT))
			break;

		/* remember location in the menu */
		last_top_row = top_row(curses_menu);
		current_index = curses_item_index();

		if (!item_tag())
			continue;

		submenu = (struct menu *) item_data();
		if (!submenu || !menu_is_visible(submenu))
			continue;
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		sym = submenu->sym;
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		switch (res) {
		case ' ':
			if (item_is_tag('t'))
				sym_toggle_tristate_value(sym);
			else if (item_is_tag('m'))
				conf(submenu);
			break;
		case KEY_RIGHT:
		case 10: /* ENTER WAS PRESSED */
			switch (item_tag()) {
			case 'm':
				if (single_menu_mode)
					submenu->data =
						(void *) (long) !submenu->data;
				else
					conf(submenu);
				break;
			case 't':
				if (sym_is_choice(sym) &&
				    sym_get_tristate_value(sym) == yes)
					conf_choice(submenu);
				else if (submenu->prompt &&
					 submenu->prompt->type == P_MENU)
					conf(submenu);
				else if (res == 10)
					sym_toggle_tristate_value(sym);
				break;
			case 's':
				conf_string(submenu);
				break;
			}
			break;
		case 'y':
			if (item_is_tag('t')) {
				if (sym_set_tristate_value(sym, yes))
					break;
				if (sym_set_tristate_value(sym, mod))
					btn_dialog(main_window, setmod_text, 0);
			}
			break;
		case 'n':
			if (item_is_tag('t'))
				sym_set_tristate_value(sym, no);
			break;
		case 'm':
			if (item_is_tag('t'))
				sym_set_tristate_value(sym, mod);
			break;
		}
	}
}

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static void conf_message_callback(const char *fmt, va_list ap)
{
	char buf[1024];

	vsnprintf(buf, sizeof(buf), fmt, ap);
	btn_dialog(main_window, buf, 1, "<OK>");
}

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static void show_help(struct menu *menu)
{
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	struct gstr help;

	if (!menu)
		return;

	help = str_new();
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	menu_get_ext_help(menu, &help);
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	show_scroll_win(main_window, _(menu_get_prompt(menu)), str_get(&help));
	str_free(&help);
}

static void conf_choice(struct menu *menu)
{
	const char *prompt = _(menu_get_prompt(menu));
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	struct menu *child = NULL;
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	struct symbol *active;
	int selected_index = 0;
	int last_top_row = 0;
	int res, i = 0;
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	struct match_state match_state = {
		.in_search = 0,
		.match_direction = MATCH_TINKER_PATTERN_DOWN,
		.pattern = "",
	};
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	active = sym_get_choice_value(menu->sym);
	/* this is mostly duplicated from the conf() function. */
	while (!global_exit) {
		reset_menu();

		for (i = 0, child = menu->list; child; child = child->next) {
			if (!show_all_items && !menu_is_visible(child))
				continue;

			if (child->sym == sym_get_choice_value(menu->sym))
				item_make(child, ':', "<X> %s",
						_(menu_get_prompt(child)));
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			else if (child->sym)
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				item_make(child, ':', "    %s",
						_(menu_get_prompt(child)));
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			else
				item_make(child, ':', "*** %s ***",
						_(menu_get_prompt(child)));

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			if (child->sym == active){
				last_top_row = top_row(curses_menu);
				selected_index = i;
			}
			i++;
		}
		show_menu(prompt ? _(prompt) : _("Choice Menu"),
				_(radiolist_instructions),
				selected_index,
				&last_top_row);
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		while (!global_exit) {
			if (match_state.in_search) {
				mvprintw(0, 0, "searching: %s",
					 match_state.pattern);
				clrtoeol();
			}
			refresh_all_windows(main_window);
			res = wgetch(menu_win(curses_menu));
			if (!res)
				break;
			if (do_match(res, &match_state, &selected_index) == 0) {
				if (selected_index != -1)
					center_item(selected_index,
						    &last_top_row);
				continue;
			}
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			if (process_special_keys(
						&res,
						(struct menu *) item_data()))
				break;
			switch (res) {
			case KEY_DOWN:
				menu_driver(curses_menu, REQ_DOWN_ITEM);
				break;
			case KEY_UP:
				menu_driver(curses_menu, REQ_UP_ITEM);
				break;
			case KEY_NPAGE:
				menu_driver(curses_menu, REQ_SCR_DPAGE);
				break;
			case KEY_PPAGE:
				menu_driver(curses_menu, REQ_SCR_UPAGE);
				break;
			case KEY_HOME:
				menu_driver(curses_menu, REQ_FIRST_ITEM);
				break;
			case KEY_END:
				menu_driver(curses_menu, REQ_LAST_ITEM);
				break;
			case 'h':
			case '?':
				show_help((struct menu *) item_data());
				break;
			}
			if (res == 10 || res == 27 || res == ' ' ||
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					res == KEY_LEFT){
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				break;
			}
			refresh_all_windows(main_window);
		}
		/* if ESC or left */
		if (res == 27 || res == KEY_LEFT)
			break;

		child = item_data();
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		if (!child || !menu_is_visible(child) || !child->sym)
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			continue;
		switch (res) {
		case ' ':
		case  10:
		case KEY_RIGHT:
			sym_set_tristate_value(child->sym, yes);
			return;
		case 'h':
		case '?':
			show_help(child);
			active = child->sym;
			break;
		case KEY_EXIT:
			return;
		}
	}
}

static void conf_string(struct menu *menu)
{
	const char *prompt = menu_get_prompt(menu);

	while (1) {
		int res;
		const char *heading;

		switch (sym_get_type(menu->sym)) {
		case S_INT:
			heading = _(inputbox_instructions_int);
			break;
		case S_HEX:
			heading = _(inputbox_instructions_hex);
			break;
		case S_STRING:
			heading = _(inputbox_instructions_string);
			break;
		default:
			heading = _("Internal nconf error!");
		}
		res = dialog_inputbox(main_window,
				prompt ? _(prompt) : _("Main Menu"),
				heading,
				sym_get_string_value(menu->sym),
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				&dialog_input_result,
				&dialog_input_result_len);
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		switch (res) {
		case 0:
			if (sym_set_string_value(menu->sym,
						dialog_input_result))
				return;
			btn_dialog(main_window,
				_("You have made an invalid entry."), 0);
			break;
		case 1:
			show_help(menu);
			break;
		case KEY_EXIT:
			return;
		}
	}
}

static void conf_load(void)
{
	while (1) {
		int res;
		res = dialog_inputbox(main_window,
				NULL, load_config_text,
				filename,
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				&dialog_input_result,
				&dialog_input_result_len);
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		switch (res) {
		case 0:
			if (!dialog_input_result[0])
				return;
			if (!conf_read(dialog_input_result)) {
				set_config_filename(dialog_input_result);
				sym_set_change_count(1);
				return;
			}
			btn_dialog(main_window, _("File does not exist!"), 0);
			break;
		case 1:
			show_scroll_win(main_window,
					_("Load Alternate Configuration"),
					load_config_help);
			break;
		case KEY_EXIT:
			return;
		}
	}
}

static void conf_save(void)
{
	while (1) {
		int res;
		res = dialog_inputbox(main_window,
				NULL, save_config_text,
				filename,
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				&dialog_input_result,
				&dialog_input_result_len);
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		switch (res) {
		case 0:
			if (!dialog_input_result[0])
				return;
			res = conf_write(dialog_input_result);
			if (!res) {
				set_config_filename(dialog_input_result);
				return;
			}
			btn_dialog(main_window, _("Can't create file! "
				"Probably a nonexistent directory."),
				1, "<OK>");
			break;
		case 1:
			show_scroll_win(main_window,
				_("Save Alternate Configuration"),
				save_config_help);
			break;
		case KEY_EXIT:
			return;
		}
	}
}

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static void setup_windows(void)
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{
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	int lines, columns;

	getmaxyx(stdscr, lines, columns);

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	if (main_window != NULL)
		delwin(main_window);

	/* set up the menu and menu window */
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	main_window = newwin(lines-2, columns-2, 2, 1);
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	keypad(main_window, TRUE);
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	mwin_max_lines = lines-7;
	mwin_max_cols = columns-6;
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	/* panels order is from bottom to top */
	new_panel(main_window);
}

int main(int ac, char **av)
{
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	int lines, columns;
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	char *mode;

	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);

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	if (ac > 1 && strcmp(av[1], "-s") == 0) {
		/* Silence conf_read() until the real callback is set up */
		conf_set_message_callback(NULL);
		av++;
	}
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	conf_parse(av[1]);
	conf_read(NULL);

	mode = getenv("NCONFIG_MODE");
	if (mode) {
		if (!strcasecmp(mode, "single_menu"))
			single_menu_mode = 1;
	}

	/* Initialize curses */
	initscr();
	/* set color theme */
	set_colors();

	cbreak();
	noecho();
	keypad(stdscr, TRUE);
	curs_set(0);

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	getmaxyx(stdscr, lines, columns);
	if (columns < 75 || lines < 20) {
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		endwin();
		printf("Your terminal should have at "
			"least 20 lines and 75 columns\n");
		return 1;
	}

	notimeout(stdscr, FALSE);
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#if NCURSES_REENTRANT
	set_escdelay(1);
#else
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	ESCDELAY = 1;
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#endif
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	/* set btns menu */
	curses_menu = new_menu(curses_menu_items);
	menu_opts_off(curses_menu, O_SHOWDESC);
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	menu_opts_on(curses_menu, O_SHOWMATCH);
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	menu_opts_on(curses_menu, O_ONEVALUE);
	menu_opts_on(curses_menu, O_NONCYCLIC);
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	menu_opts_on(curses_menu, O_IGNORECASE);
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	set_menu_mark(curses_menu, " ");
	set_menu_fore(curses_menu, attributes[MAIN_MENU_FORE]);
	set_menu_back(curses_menu, attributes[MAIN_MENU_BACK]);
	set_menu_grey(curses_menu, attributes[MAIN_MENU_GREY]);

	set_config_filename(conf_get_configname());
	setup_windows();

	/* check for KEY_FUNC(1) */
	if (has_key(KEY_F(1)) == FALSE) {
		show_scroll_win(main_window,
				_("Instructions"),
				_(menu_no_f_instructions));
	}

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	conf_set_message_callback(conf_message_callback);
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	/* do the work */
	while (!global_exit) {
		conf(&rootmenu);
		if (!global_exit && do_exit() == 0)
			break;
	}
	/* ok, we are done */
	unpost_menu(curses_menu);
	free_menu(curses_menu);
	delwin(main_window);
	clear();
	refresh();
	endwin();
	return 0;
}