X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=ui%2Fncurses%2Fnc-config.c;h=4eeeff830aed783a67874bebab16f32a8ba047ed;hp=47e6b72df4379964a7752108ca46e0ff373ce12d;hb=d27570168fd6d5a2144553002c8082ae626b7e84;hpb=4dd0ff12814b03f06ee0cd813d8f54aa42fc94fb

diff --git a/ui/ncurses/nc-config.c b/ui/ncurses/nc-config.c
index 47e6b72..4eeeff8 100644
--- a/ui/ncurses/nc-config.c
+++ b/ui/ncurses/nc-config.c
@@ -31,7 +31,7 @@
 #include "nc-config.h"
 #include "nc-widgets.h"
 
-#define N_FIELDS	18
+#define N_FIELDS	23
 
 enum net_conf_type {
 	NET_CONF_TYPE_DHCP_ALL,
@@ -43,9 +43,13 @@ struct config_screen {
 	struct nc_scr		scr;
 	struct cui		*cui;
 	struct nc_widgetset	*widgetset;
+	WINDOW			*pad;
+
 	bool			exit;
 	void			(*on_exit)(struct cui *);
 
+	int			scroll_y;
+
 	int			label_x;
 	int			field_x;
 	int			network_config_y;
@@ -57,6 +61,7 @@ struct config_screen {
 		struct nc_widget_label		*autoboot_l;
 		struct nc_widget_textbox	*timeout_f;
 		struct nc_widget_label		*timeout_l;
+		struct nc_widget_label		*timeout_help_l;
 
 		struct nc_widget_label		*network_l;
 		struct nc_widget_select		*network_f;
@@ -67,10 +72,14 @@ struct config_screen {
 		struct nc_widget_textbox	*ip_addr_f;
 		struct nc_widget_label		*ip_mask_l;
 		struct nc_widget_textbox	*ip_mask_f;
+		struct nc_widget_label		*ip_addr_mask_help_l;
 		struct nc_widget_label		*gateway_l;
 		struct nc_widget_textbox	*gateway_f;
+		struct nc_widget_label		*gateway_help_l;
 		struct nc_widget_label		*dns_l;
 		struct nc_widget_textbox	*dns_f;
+		struct nc_widget_label		*dns_dhcp_help_l;
+		struct nc_widget_label		*dns_help_l;
 
 		struct nc_widget_button		*ok_b;
 		struct nc_widget_button		*cancel_b;
@@ -88,6 +97,16 @@ static struct config_screen *config_screen_from_scr(struct nc_scr *scr)
 	return config_screen;
 }
 
+static void pad_refresh(struct config_screen *screen)
+{
+	int y, x, rows, cols;
+
+	getmaxyx(screen->scr.sub_ncw, rows, cols);
+	getbegyx(screen->scr.sub_ncw, y, x);
+
+	prefresh(screen->pad, screen->scroll_y, 0, y, x, rows, cols);
+}
+
 static void config_screen_process_key(struct nc_scr *scr, int key)
 {
 	struct config_screen *screen = config_screen_from_scr(scr);
@@ -97,7 +116,7 @@ static void config_screen_process_key(struct nc_scr *scr, int key)
 	if (screen->exit)
 		screen->on_exit(screen->cui);
 	else if (handled)
-		wrefresh(screen->scr.main_ncw);
+		pad_refresh(screen);
 }
 
 static void config_screen_resize(struct nc_scr *scr)
@@ -111,7 +130,7 @@ 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);
+	pad_refresh(screen);
 	return 0;
 }
 
@@ -253,19 +272,25 @@ static int layout_pair(struct config_screen *screen, int y,
 static void config_screen_layout_widgets(struct config_screen *screen,
 		enum net_conf_type net_conf)
 {
-	struct nc_widget *wl, *wf;
+	struct nc_widget *wl, *wf, *wh;
+	int y, x, help_x;
 	bool show;
-	int y, x;
 
 	y = 1;
+	help_x = screen->field_x + 2 +
+		widget_width(widget_textbox_base(screen->widgets.dns_f));
 
 	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));
+	wf = widget_textbox_base(screen->widgets.timeout_f);
+	widget_move(widget_label_base(screen->widgets.timeout_l),
+			y, screen->label_x);
+	widget_move(wf, y, screen->field_x);
+	widget_move(widget_label_base(screen->widgets.timeout_help_l),
+			y, screen->field_x + widget_width(wf) + 1);
 
-	y += 1;
+	y += 2;
 
 	y += layout_pair(screen, y, screen->widgets.network_l,
 			widget_select_base(screen->widgets.network_f));
@@ -305,19 +330,43 @@ static void config_screen_layout_widgets(struct config_screen *screen,
 	if (show) {
 		widget_move(wl, y, x);
 		widget_move(wf, y, x + 2);
-		y += 1;
+	}
+
+	/* help for IP/mask */
+	wh = widget_label_base(screen->widgets.ip_addr_mask_help_l);
+	widget_set_visible(wh, show);
+	if (show) {
+		widget_move(wh, y, help_x);
+		y++;
 	}
 
 	wl = widget_label_base(screen->widgets.gateway_l);
 	wf = widget_textbox_base(screen->widgets.gateway_f);
+	wh = widget_label_base(screen->widgets.gateway_help_l);
 	widget_set_visible(wl, show);
 	widget_set_visible(wf, show);
+	widget_set_visible(wh, show);
 
-	if (show)
-		y += layout_pair(screen, y, screen->widgets.gateway_l, wf) + 1;
+	if (show) {
+		layout_pair(screen, y, screen->widgets.gateway_l, wf);
+		widget_move(wh, y, help_x);
+		y++;
+	}
 
-	y += layout_pair(screen, y, screen->widgets.dns_l,
+	wh = widget_label_base(screen->widgets.dns_help_l);
+	layout_pair(screen, y, screen->widgets.dns_l,
 			widget_textbox_base(screen->widgets.dns_f));
+	widget_move(wh, y, help_x);
+	y++;
+
+	/* we show the DNS/DHCP help if we're configuring DHCP */
+	show = net_conf != NET_CONF_TYPE_STATIC;
+	wl = widget_label_base(screen->widgets.dns_dhcp_help_l);
+	widget_set_visible(wl, show);
+	if (show) {
+		widget_move(wl, y, screen->field_x);
+		y += 1;
+	}
 
 	y += 1;
 
@@ -368,6 +417,15 @@ static enum net_conf_type find_net_conf_type(const struct config *config)
 	return NET_CONF_TYPE_DHCP_ALL;
 }
 
+static void config_screen_setup_empty(struct config_screen *screen)
+{
+	widget_new_label(screen->widgetset, 2, screen->field_x,
+			"Waiting for configuration data...");
+	screen->widgets.cancel_b = widget_new_button(screen->widgetset,
+			4, screen->field_x, 6, "Cancel", cancel_click, screen);
+}
+
+
 static void config_screen_setup_widgets(struct config_screen *screen,
 		const struct config *config,
 		const struct system_info *sysinfo)
@@ -391,6 +449,7 @@ static void config_screen_setup_widgets(struct config_screen *screen,
 	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.timeout_help_l = widget_new_label(set, 0, 0, "seconds");
 
 	screen->widgets.network_l = widget_new_label(set, 0, 0, "Network");
 	screen->widgets.network_f = widget_new_select(set, 0, 0, 50);
@@ -444,9 +503,13 @@ static void config_screen_setup_widgets(struct config_screen *screen,
 	screen->widgets.ip_addr_f = widget_new_textbox(set, 0, 0, 16, ip);
 	screen->widgets.ip_mask_l = widget_new_label(set, 0, 0, "/");
 	screen->widgets.ip_mask_f = widget_new_textbox(set, 0, 0, 3, mask);
+	screen->widgets.ip_addr_mask_help_l =
+		widget_new_label(set, 0, 0, "(eg. 192.168.0.10 / 24)");
 
 	screen->widgets.gateway_l = widget_new_label(set, 0, 0, "Gateway:");
 	screen->widgets.gateway_f = widget_new_textbox(set, 0, 0, 16, gw);
+	screen->widgets.gateway_help_l =
+		widget_new_label(set, 0, 0, "(eg. 192.168.0.1)");
 
 	str = talloc_strdup(screen, "");
 	for (i = 0; i < config->network.n_dns_servers; i++) {
@@ -457,6 +520,11 @@ static void config_screen_setup_widgets(struct config_screen *screen,
 
 	screen->widgets.dns_l = widget_new_label(set, 0, 0, "DNS Server(s):");
 	screen->widgets.dns_f = widget_new_textbox(set, 0, 0, 32, str);
+	screen->widgets.dns_help_l =
+		widget_new_label(set, 0, 0, "(eg. 192.168.0.2)");
+
+	screen->widgets.dns_dhcp_help_l = widget_new_label(set, 0, 0,
+			"(if not provided by DHCP server)");
 
 	screen->widgets.ok_b = widget_new_button(set, 0, 0, 6, "OK",
 			ok_click, screen);
@@ -464,6 +532,84 @@ static void config_screen_setup_widgets(struct config_screen *screen,
 			cancel_click, screen);
 }
 
+static void config_screen_widget_focus(struct nc_widget *widget, void *arg)
+{
+	struct config_screen *screen = arg;
+	int w_y, s_max;
+
+	w_y = widget_y(widget) + widget_focus_y(widget);
+	s_max = getmaxy(screen->scr.sub_ncw) - 1;
+
+	if (w_y < screen->scroll_y)
+		screen->scroll_y = w_y;
+
+	else if (w_y + screen->scroll_y + 1 > s_max)
+		screen->scroll_y = 1 + w_y - s_max;
+
+	else
+		return;
+
+	pad_refresh(screen);
+}
+
+
+void config_screen_update(struct config_screen *screen,
+		const struct config *config,
+		const struct system_info *sysinfo)
+{
+	bool repost = false;
+	int height;
+
+	/* The size of the pad we'll need depends on the number of interfaces.
+	 *
+	 * We use N_FIELDS (which is quite conservative, as some fields share
+	 * a line) as a base, then add 3 (as the network select field is
+	 * takes 3 lines), and n_interfaces (as the network interface field
+	 * has n_interfaces lines).
+	 */
+	height = N_FIELDS + 3;
+	if (sysinfo)
+		height += sysinfo->n_interfaces;
+	if (!screen->pad || getmaxy(screen->pad) < height) {
+		if (screen->pad)
+			delwin(screen->pad);
+		screen->pad = newpad(height, COLS);
+	}
+
+	if (screen->widgetset) {
+		widgetset_unpost(screen->widgetset);
+		talloc_free(screen->widgetset);
+		repost = true;
+	}
+
+	screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
+			screen->pad);
+	widgetset_set_widget_focus(screen->widgetset,
+			config_screen_widget_focus, screen);
+
+	if (!config || !sysinfo) {
+		config_screen_setup_empty(screen);
+	} else {
+		screen->net_conf_type = find_net_conf_type(config);
+
+		config_screen_setup_widgets(screen, config, sysinfo);
+		config_screen_layout_widgets(screen, screen->net_conf_type);
+	}
+
+	if (repost)
+		widgetset_post(screen->widgetset);
+
+	pad_refresh(screen);
+}
+
+static int config_screen_destroy(void *arg)
+{
+	struct config_screen *screen = arg;
+	if (screen->pad)
+		delwin(screen->pad);
+	return 0;
+}
+
 struct config_screen *config_screen_init(struct cui *cui,
 		const struct config *config,
 		const struct system_info *sysinfo,
@@ -472,6 +618,7 @@ struct config_screen *config_screen_init(struct cui *cui,
 	struct config_screen *screen;
 
 	screen = talloc_zero(cui, struct config_screen);
+	talloc_set_destructor(screen, config_screen_destroy);
 	nc_scr_init(&screen->scr, pb_config_screen_sig, 0,
 			cui, config_screen_process_key,
 			config_screen_post, config_screen_unpost,
@@ -489,15 +636,11 @@ struct config_screen *config_screen_init(struct cui *cui,
 			"tab=next, shift+tab=previous");
 	nc_scr_frame_draw(&screen->scr);
 
-	screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
-			screen->scr.sub_ncw);
-	screen->net_conf_type = find_net_conf_type(config);
+	scrollok(screen->scr.sub_ncw, true);
 
-	config_screen_setup_widgets(screen, config, sysinfo);
-	config_screen_layout_widgets(screen, screen->net_conf_type);
+	config_screen_update(screen, config, sysinfo);
 
 	wrefresh(screen->scr.main_ncw);
-	scrollok(screen->scr.sub_ncw, true);
 
 	return screen;
 }