ui/ncurses: Add basic config editor

This change adds a simple configuration editor to the ncurses UI.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 213 insertions, 0 deletions

diff --git a/ui/ncurses/nc-config.c b/ui/ncurses/nc-config.c
new file mode 100644
index 0000000..b7985aa
--- /dev/null
+++ b/ui/ncurses/nc-config.c
@@ -0,0 +1,213 @@
+/*
+ *  Copyright (C) 2013 IBM Corporation
+ *
+ *  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; version 2 of the License.
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#define _GNU_SOURCE
+
+
+#include <string.h>
+
+#include <talloc/talloc.h>
+#include <types/types.h>
+#include <log/log.h>
+
+#include "config.h"
+#include "nc-cui.h"
+#include "nc-config.h"
+#include "nc-widgets.h"
+
+#define N_FIELDS	9
+
+struct config_screen {
+	struct nc_scr		scr;
+	struct cui		*cui;
+	struct nc_widgetset	*widgetset;
+	bool			exit;
+	void			(*on_exit)(struct cui *);
+
+	int			label_x;
+	int			field_x;
+
+	struct {
+		struct nc_widget_checkbox	*autoboot_f;
+		struct nc_widget_label		*autoboot_l;
+		struct nc_widget_textbox	*timeout_f;
+		struct nc_widget_label		*timeout_l;
+
+		struct nc_widget_label		*network_l;
+		struct nc_widget_label		*iface_l;
+		struct nc_widget_select		*iface_f;
+
+		struct nc_widget_button		*ok_b;
+		struct nc_widget_button		*cancel_b;
+	} widgets;
+};
+
+static struct config_screen *config_screen_from_scr(struct nc_scr *scr)
+{
+	struct config_screen *config_screen;
+
+	assert(scr->sig == pb_config_screen_sig);
+	config_screen = (struct config_screen *)
+		((char *)scr - (size_t)&((struct config_screen *)0)->scr);
+	assert(config_screen->scr.sig == pb_config_screen_sig);
+	return config_screen;
+}
+
+static void config_screen_process_key(struct nc_scr *scr, int key)
+{
+	struct config_screen *screen = config_screen_from_scr(scr);
+	bool handled;
+
+	handled = widgetset_process_key(screen->widgetset, key);
+	if (screen->exit)
+		screen->on_exit(screen->cui);
+	else if (handled)
+		wrefresh(screen->scr.main_ncw);
+}
+
+static void config_screen_resize(struct nc_scr *scr)
+{
+	struct config_screen *screen = config_screen_from_scr(scr);
+	(void)screen;
+}
+
+static int config_screen_post(struct nc_scr *scr)
+{
+	struct config_screen *screen = config_screen_from_scr(scr);
+	widgetset_post(screen->widgetset);
+	nc_scr_frame_draw(scr);
+	wrefresh(scr->main_ncw);
+	return 0;
+}
+
+static int config_screen_unpost(struct nc_scr *scr)
+{
+	struct config_screen *screen = config_screen_from_scr(scr);
+	widgetset_unpost(screen->widgetset);
+	return 0;
+}
+
+struct nc_scr *config_screen_scr(struct config_screen *screen)
+{
+	return &screen->scr;
+}
+
+static void ok_click(void *arg)
+{
+	struct config_screen *screen = arg;
+	/* todo: save config */
+	screen->on_exit(screen->cui);
+}
+
+static void cancel_click(void *arg)
+{
+	struct config_screen *screen = arg;
+	screen->exit = true;
+}
+
+static int layout_pair(struct config_screen *screen, int y,
+		struct nc_widget_label *label,
+		struct nc_widget *field)
+{
+	struct nc_widget *label_w = widget_label_base(label);
+	widget_move(label_w, y, screen->label_x);
+	widget_move(field, y, screen->field_x);
+	return max(widget_height(label_w), widget_height(field));
+}
+
+static void config_screen_layout_widgets(struct config_screen *screen)
+{
+	int y;
+
+	y = 1;
+
+	y += layout_pair(screen, y, screen->widgets.autoboot_l,
+			widget_checkbox_base(screen->widgets.autoboot_f));
+
+	y += layout_pair(screen, y, screen->widgets.timeout_l,
+			widget_textbox_base(screen->widgets.timeout_f));
+
+	y++;
+
+	widget_move(widget_button_base(screen->widgets.ok_b),
+			y, screen->field_x);
+	widget_move(widget_button_base(screen->widgets.cancel_b),
+			y, screen->field_x + 10);
+}
+
+static void config_screen_setup_widgets(struct config_screen *screen,
+		const struct config *config,
+		const struct system_info *sysinfo)
+{
+	struct nc_widgetset *set = screen->widgetset;
+	char *str;
+
+	(void)sysinfo;
+
+	build_assert(sizeof(screen->widgets) / sizeof(struct widget *)
+			== N_FIELDS);
+
+	screen->widgets.autoboot_l = widget_new_label(set, 0, 0, "Autoboot:");
+	screen->widgets.autoboot_f = widget_new_checkbox(set, 0, 0,
+					config->autoboot_enabled);
+
+	str = talloc_asprintf(screen, "%d", config->autoboot_timeout_sec);
+	screen->widgets.timeout_l = widget_new_label(set, 0, 0, "Timeout:");
+	screen->widgets.timeout_f = widget_new_textbox(set, 0, 0, 5, str);
+
+	screen->widgets.ok_b = widget_new_button(set, 0, 0, 6, "OK",
+			ok_click, screen);
+	screen->widgets.cancel_b = widget_new_button(set, 0, 0, 6, "Cancel",
+			cancel_click, screen);
+
+}
+
+struct config_screen *config_screen_init(struct cui *cui,
+		const struct config *config,
+		const struct system_info *sysinfo,
+		void (*on_exit)(struct cui *))
+{
+	struct config_screen *screen;
+
+	screen = talloc_zero(cui, struct config_screen);
+	nc_scr_init(&screen->scr, pb_config_screen_sig, 0,
+			cui, config_screen_process_key,
+			config_screen_post, config_screen_unpost,
+			config_screen_resize);
+
+	screen->cui = cui;
+	screen->on_exit = on_exit;
+	screen->label_x = 2;
+	screen->field_x = 16;
+
+	screen->scr.frame.ltitle = talloc_strdup(screen,
+			"Petitboot System Configuration");
+	screen->scr.frame.rtitle = NULL;
+	screen->scr.frame.help = talloc_strdup(screen,
+			"tab=next, shift+tab=previous");
+	nc_scr_frame_draw(&screen->scr);
+
+	screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
+			screen->scr.sub_ncw);
+	config_screen_setup_widgets(screen, config, sysinfo);
+	config_screen_layout_widgets(screen);
+
+	wrefresh(screen->scr.main_ncw);
+	scrollok(screen->scr.sub_ncw, true);
+
+	return screen;
+}