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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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+
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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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+
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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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+
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+#include <gpxe/nvo.h>
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+extern struct nvo_block *ugly_nvo_hack;
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+
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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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+
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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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+
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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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+
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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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+
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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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+/**
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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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+
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+ /* Mark as not editing */
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+ widget->editing = 0;
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+
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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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+
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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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+/**
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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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+/**
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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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+
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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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+
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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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+/**
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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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+
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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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+
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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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+
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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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+
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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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+/**
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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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+/**
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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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+
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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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+
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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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+
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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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+
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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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+ }
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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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+}
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+
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+void uitest ( void ) {
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+ struct config_context dummy_context;
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+
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+ dummy_context.options = ugly_nvo_hack->options;
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+
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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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+
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+ main_loop ( &dummy_context );
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+
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+ endwin();
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+}
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