/*
* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <curses.h>
#include <console.h>
#include <gpxe/settings.h>
#include <gpxe/editbox.h>
#include <gpxe/settings_ui.h>
/** @file
*
* Option configuration console
*
*/
#include <gpxe/nvo.h>
extern struct nvo_block *ugly_nvo_hack;
/* Colour pairs */
#define CPAIR_NORMAL 1
#define CPAIR_SELECT 2
#define CPAIR_EDIT 3
#define CPAIR_ALERT 4
/* Screen layout */
#define TITLE_ROW 1
#define SETTINGS_LIST_ROW 3
#define SETTINGS_LIST_COL 1
#define INFO_ROW 20
#define ALERT_ROW 20
#define INSTRUCTION_ROW 22
#define INSTRUCTION_PAD " "
/** Layout of text within a setting widget */
struct setting_row {
char start[0];
char pad1[1];
char name[15];
char pad2[1];
char value[60];
char pad3[1];
char nul;
} __attribute__ (( packed ));
/** A setting widget */
struct setting_widget {
/** Configuration context */
struct config_context *context;
/** Configuration setting */
struct config_setting *setting;
/** Screen row */
unsigned int row;
/** Screen column */
unsigned int col;
/** Edit box widget used for editing setting */
struct edit_box editbox;
/** Editing in progress flag */
int editing;
/** Buffer for setting's value */
char value[256]; /* enough size for a DHCP string */
};
/** Registered configuration settings */
static struct config_setting
config_settings[0] __table_start ( config_settings );
static struct config_setting
config_settings_end[0] __table_end ( config_settings );
#define NUM_SETTINGS ( ( unsigned ) ( config_settings_end - config_settings ) )
/**
* Load setting widget value from configuration context
*
* @v widget Setting widget
*
*/
static void load_setting ( struct setting_widget *widget ) {
/* Mark as not editing */
widget->editing = 0;
/* Read current setting value */
if ( show_setting ( widget->context, widget->setting,
widget->value, sizeof ( widget->value ) ) != 0 ) {
widget->value[0] = '\0';
}
/* Initialise edit box */
init_editbox ( &widget->editbox, widget->value,
sizeof ( widget->value ), NULL, widget->row,
( widget->col + offsetof ( struct setting_row, value )),
sizeof ( ( ( struct setting_row * ) NULL )->value ) );
}
/**
* Save setting widget value back to configuration context
*
* @v widget Setting widget
*/
static int save_setting ( struct setting_widget *widget ) {
return set_setting ( widget->context, widget->setting, widget->value );
}
/**
* Initialise setting widget
*
* @v widget Setting widget
* @v context Configuration context
* @v setting Configuration setting
* @v row Screen row
* @v col Screen column
*/
static void init_setting ( struct setting_widget *widget,
struct config_context *context,
struct config_setting *setting,
unsigned int row, unsigned int col ) {
/* Initialise widget structure */
memset ( widget, 0, sizeof ( *widget ) );
widget->context = context;
widget->setting = setting;
widget->row = row;
widget->col = col;
/* Read current setting value */
load_setting ( widget );
}
/**
* Draw setting widget
*
* @v widget Setting widget
*/
static void draw_setting ( struct setting_widget *widget ) {
struct setting_row row;
unsigned int len;
unsigned int curs_col;
char *value;
/* Fill row with spaces */
memset ( &row, ' ', sizeof ( row ) );
row.nul = '\0';
/* Construct dot-padded name */
memset ( row.name, '.', sizeof ( row.name ) );
len = strlen ( widget->setting->name );
if ( len > sizeof ( row.name ) )
len = sizeof ( row.name );
memcpy ( row.name, widget->setting->name, len );
/* Construct space-padded value */
value = widget->value;
if ( ! *value )
value = "<not specified>";
len = strlen ( value );
if ( len > sizeof ( row.value ) )
len = sizeof ( row.value );
memcpy ( row.value, value, len );
curs_col = ( widget->col + offsetof ( typeof ( row ), value )
+ len );
/* Print row */
mvprintw ( widget->row, widget->col, "%s", row.start );
move ( widget->row, curs_col );
if ( widget->editing )
draw_editbox ( &widget->editbox );
}
/**
* Edit setting widget
*
* @v widget Setting widget
* @v key Key pressed by user
* @ret key Key returned to application, or zero
*/
static int edit_setting ( struct setting_widget *widget, int key ) {
widget->editing = 1;
return edit_editbox ( &widget->editbox, key );
}
/**
* Initialise setting widget by index
*
* @v widget Setting widget
* @v context Configuration context
* @v index Index of setting with settings list
*/
static void init_setting_index ( struct setting_widget *widget,
struct config_context *context,
unsigned int index ) {
init_setting ( widget, context, &config_settings[index],
( SETTINGS_LIST_ROW + index ), SETTINGS_LIST_COL );
}
/**
* Print message centred on specified row
*
* @v row Row
* @v fmt printf() format string
* @v args printf() argument list
*/
static void vmsg ( unsigned int row, const char *fmt, va_list args ) {
char buf[COLS];
size_t len;
len = vsnprintf ( buf, sizeof ( buf ), fmt, args );
mvprintw ( row, ( ( COLS - len ) / 2 ), "%s", buf );
}
/**
* Print message centred on specified row
*
* @v row Row
* @v fmt printf() format string
* @v .. printf() arguments
*/
static void msg ( unsigned int row, const char *fmt, ... ) {
va_list args;
va_start ( args, fmt );
vmsg ( row, fmt, args );
va_end ( args );
}
/**
* Clear message on specified row
*
* @v row Row
*/
static void clearmsg ( unsigned int row ) {
move ( row, 0 );
clrtoeol();
}
/**
* Print alert message
*
* @v fmt printf() format string
* @v args printf() argument list
*/
static void valert ( const char *fmt, va_list args ) {
clearmsg ( ALERT_ROW );
color_set ( CPAIR_ALERT, NULL );
vmsg ( ALERT_ROW, fmt, args );
sleep ( 2 );
color_set ( CPAIR_NORMAL, NULL );
clearmsg ( ALERT_ROW );
}
/**
* Print alert message
*
* @v fmt printf() format string
* @v ... printf() arguments
*/
static void alert ( const char *fmt, ... ) {
va_list args;
va_start ( args, fmt );
valert ( fmt, args );
va_end ( args );
}
/**
* Draw title row
*/
static void draw_title_row ( void ) {
attron ( A_BOLD );
msg ( TITLE_ROW, "gPXE option configuration console" );
attroff ( A_BOLD );
}
/**
* Draw information row
*
* @v setting Current configuration setting
*/
static void draw_info_row ( struct config_setting *setting ) {
clearmsg ( INFO_ROW );
attron ( A_BOLD );
msg ( INFO_ROW, "%s (%s) - %s", setting->name,
setting->type->description, setting->description );
attroff ( A_BOLD );
}
/**
* Draw instruction row
*
* @v editing Editing in progress flag
*/
static void draw_instruction_row ( int editing ) {
clearmsg ( INSTRUCTION_ROW );
if ( editing ) {
msg ( INSTRUCTION_ROW,
"Enter - accept changes" INSTRUCTION_PAD
"Ctrl-C - discard changes" );
} else {
msg ( INSTRUCTION_ROW,
"Ctrl-S - save configuration" );
}
}
static void main_loop ( struct config_context *context ) {
struct setting_widget widget;
unsigned int current = 0;
unsigned int next;
int i;
int key;
int rc;
/* Print initial screen content */
draw_title_row();
color_set ( CPAIR_NORMAL, NULL );
for ( i = ( NUM_SETTINGS - 1 ) ; i >= 0 ; i-- ) {
init_setting_index ( &widget, context, i );
draw_setting ( &widget );
}
while ( 1 ) {
/* Redraw information and instruction rows */
draw_info_row ( widget.setting );
draw_instruction_row ( widget.editing );
/* Redraw current setting */
color_set ( ( widget.editing ? CPAIR_EDIT : CPAIR_SELECT ),
NULL );
draw_setting ( &widget );
color_set ( CPAIR_NORMAL, NULL );
key = getchar();
if ( widget.editing ) {
key = edit_setting ( &widget, key );
switch ( key ) {
case 0x0a: /* Enter */
if ( ( rc = save_setting ( &widget ) ) != 0 ) {
alert ( " Could not set %s: %s ",
widget.setting->name,
strerror ( rc ) );
}
/* Fall through */
case 0x03: /* Ctrl-C */
load_setting ( &widget );
break;
default:
/* Do nothing */
break;
}
} else {
next = current;
switch ( key ) {
case '+':
if ( next < ( NUM_SETTINGS - 1 ) )
next++;
break;
case '-':
if ( next > 0 )
next--;
break;
case 0x13: /* Ctrl-S */
if ( ( rc = nvo_save ( ugly_nvo_hack ) ) != 0){
alert ( " Could not save options: %s ",
strerror ( rc ) );
}
return;
default:
edit_setting ( &widget, key );
break;
}
if ( next != current ) {
draw_setting ( &widget );
init_setting_index ( &widget, context, next );
current = next;
}
}
}
}
void settings_ui ( struct config_context *context ) {
initscr();
start_color();
init_pair ( CPAIR_NORMAL, COLOR_WHITE, COLOR_BLUE );
init_pair ( CPAIR_SELECT, COLOR_WHITE, COLOR_RED );
init_pair ( CPAIR_EDIT, COLOR_BLACK, COLOR_CYAN );
init_pair ( CPAIR_ALERT, COLOR_WHITE, COLOR_RED );
color_set ( CPAIR_NORMAL, NULL );
erase();
main_loop ( context );
endwin();
}
