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Add (partly-functional) user interface for editing configuration settings
This commit is contained in:
Michael Brown
parent
3e0f7621eb
commit
1e322d4b4c
@ -144,7 +144,8 @@ SRCDIRS += drivers/bitbash
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SRCDIRS += interface/pxe
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SRCDIRS += tests
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SRCDIRS += crypto
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SRCDIRS += hci hci/commands hci/mucurses
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SRCDIRS += hci hci/commands hci/tui
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SRCDIRS += hci/mucurses hci/mucurses/widgets
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# NON_AUTO_SRCS lists files that are excluded from the normal
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# automatic build system.
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285
src/hci/tui/settings_ui.c
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285
src/hci/tui/settings_ui.c
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@ -0,0 +1,285 @@
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/*
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* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <string.h>
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#include <curses.h>
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#include <console.h>
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#include <gpxe/settings.h>
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#include <gpxe/editbox.h>
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/** @file
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*
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* Configuration settings UI
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*
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*/
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#include <gpxe/nvo.h>
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extern struct nvo_block *ugly_nvo_hack;
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/* Colour pairs */
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#define CPAIR_NORMAL 1
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#define CPAIR_SELECT 2
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#define CPAIR_EDIT 3
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/* Screen layout */
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#define SETTINGS_LIST_ROW 3
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#define SETTINGS_LIST_COL 1
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/** Layout of text within a setting widget */
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struct setting_row {
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char start[0];
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char pad1[1];
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char name[15];
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char pad2[1];
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char value[60];
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char pad3[1];
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char nul;
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} __attribute__ (( packed ));
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/** A setting widget */
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struct setting_widget {
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/** Configuration context */
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struct config_context *context;
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/** Configuration setting */
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struct config_setting *setting;
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/** Screen row */
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unsigned int row;
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/** Screen column */
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unsigned int col;
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/** Edit box widget used for editing setting */
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struct edit_box editbox;
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/** Editing active flag */
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int editing;
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/** Buffer for setting's value */
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char value[256]; /* enough size for a DHCP string */
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};
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/** Registered configuration settings */
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static struct config_setting
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config_settings[0] __table_start ( config_settings );
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static struct config_setting
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config_settings_end[0] __table_end ( config_settings );
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#define NUM_SETTINGS ( ( unsigned ) ( config_settings_end - config_settings ) )
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/**
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* Load setting widget value from configuration context
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*
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* @v widget Setting widget
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*
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*/
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static void load_setting ( struct setting_widget *widget ) {
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/* Mark as not editing */
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widget->editing = 0;
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/* Read current setting value */
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if ( widget->setting->type->show ( widget->context, widget->setting,
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widget->value,
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sizeof ( widget->value ) ) != 0 ) {
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widget->value[0] = '\0';
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}
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/* Initialise edit box */
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init_editbox ( &widget->editbox, widget->value,
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sizeof ( widget->value ), NULL, widget->row,
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( widget->col + offsetof ( struct setting_row, value )),
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sizeof ( ( ( struct setting_row * ) NULL )->value ) );
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}
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/**
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* Save setting widget value back to configuration context
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*
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* @v widget Setting widget
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*/
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static int save_setting ( struct setting_widget *widget ) {
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widget->editing = 0;
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return widget->setting->type->set ( widget->context, widget->setting,
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widget->value );
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}
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/**
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* Initialise setting widget
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*
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* @v widget Setting widget
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* @v context Configuration context
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* @v setting Configuration setting
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* @v row Screen row
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* @v col Screen column
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*/
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static void init_setting ( struct setting_widget *widget,
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struct config_context *context,
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struct config_setting *setting,
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unsigned int row, unsigned int col ) {
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/* Initialise widget structure */
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memset ( widget, 0, sizeof ( *widget ) );
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widget->context = context;
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widget->setting = setting;
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widget->row = row;
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widget->col = col;
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/* Read current setting value */
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load_setting ( widget );
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}
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/**
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* Draw setting widget
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*
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* @v widget Setting widget
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*/
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static void draw_setting ( struct setting_widget *widget ) {
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struct setting_row row;
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unsigned int len;
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unsigned int curs_col;
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char *value;
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/* Fill row with spaces */
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memset ( &row, ' ', sizeof ( row ) );
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row.nul = '\0';
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/* Construct dot-padded name */
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memset ( row.name, '.', sizeof ( row.name ) );
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len = strlen ( widget->setting->name );
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if ( len > sizeof ( row.name ) )
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len = sizeof ( row.name );
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memcpy ( row.name, widget->setting->name, len );
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/* Construct space-padded value */
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value = widget->value;
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if ( ! *value )
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value = "<not specified>";
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len = strlen ( value );
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if ( len > sizeof ( row.value ) )
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len = sizeof ( row.value );
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memcpy ( row.value, value, len );
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curs_col = ( widget->col + offsetof ( typeof ( row ), value )
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+ len );
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/* Print row */
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mvprintw ( widget->row, widget->col, "%s", row.start );
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move ( widget->row, curs_col );
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if ( widget->editing )
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draw_editbox ( &widget->editbox );
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}
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/**
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* Edit setting widget
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*
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* @v widget Setting widget
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* @v key Key pressed by user
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* @ret key Key returned to application, or zero
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*/
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static int edit_setting ( struct setting_widget *widget, int key ) {
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widget->editing = 1;
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return edit_editbox ( &widget->editbox, key );
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}
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/**
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* Initialise setting widget by index
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*
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* @v widget Setting widget
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* @v context Configuration context
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* @v index Index of setting with settings list
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*/
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static void init_setting_index ( struct setting_widget *widget,
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struct config_context *context,
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unsigned int index ) {
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init_setting ( widget, context, &config_settings[index],
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( SETTINGS_LIST_ROW + index ), SETTINGS_LIST_COL );
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}
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static void main_loop ( struct config_context *context ) {
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struct setting_widget widget;
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unsigned int current = 0;
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unsigned int next;
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int i;
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int key;
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int rc;
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/* Print initial screen content */
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color_set ( CPAIR_NORMAL, NULL );
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for ( i = ( NUM_SETTINGS - 1 ) ; i >= 0 ; i-- ) {
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init_setting_index ( &widget, context, i );
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draw_setting ( &widget );
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}
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while ( 1 ) {
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/* Redraw current setting */
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color_set ( ( widget.editing ? CPAIR_EDIT : CPAIR_SELECT ),
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NULL );
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draw_setting ( &widget );
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color_set ( CPAIR_NORMAL, NULL );
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key = getchar();
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if ( widget.editing ) {
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key = edit_setting ( &widget, key );
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switch ( key ) {
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case 0x0a: /* Enter */
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if ( ( rc = save_setting ( &widget ) ) != 0 ) {
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}
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break;
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case 0x03: /* Ctrl-C */
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load_setting ( &widget );
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break;
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default:
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/* Do nothing */
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break;
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}
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} else {
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next = current;
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switch ( key ) {
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case '+':
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if ( next < ( NUM_SETTINGS - 1 ) )
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next++;
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break;
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case '-':
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if ( next > 0 )
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next--;
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break;
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default:
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edit_setting ( &widget, key );
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break;
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}
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if ( next != current ) {
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draw_setting ( &widget );
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init_setting_index ( &widget, context, next );
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current = next;
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}
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}
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}
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}
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void uitest ( void ) {
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struct config_context dummy_context;
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dummy_context.options = ugly_nvo_hack->options;
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initscr();
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start_color();
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init_pair ( CPAIR_NORMAL, COLOR_WHITE, COLOR_BLUE );
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init_pair ( CPAIR_SELECT, COLOR_WHITE, COLOR_RED );
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init_pair ( CPAIR_EDIT, COLOR_BLACK, COLOR_GREEN );
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color_set ( CPAIR_NORMAL, NULL );
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erase();
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main_loop ( &dummy_context );
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endwin();
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}
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