ui/ncurses: Add status log UI

Currently, status messages from the server are displayed in a single
line at the bottom of the main menu UI, and are lost once a new status
is reported.

This change adds a facility for the UI to collect and display the status
messages from the server, in a dedicated UI screen. This allows a user
to look back through the discovery & boot process.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/ui/ncurses/nc-statuslog.c b/ui/ncurses/nc-statuslog.c
new file mode 100644
index 0000000..1943f39
--- /dev/null
+++ b/ui/ncurses/nc-statuslog.c
@@ -0,0 +1,113 @@
+/*
+ *  Copyright (C) 2016 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
+ */
+
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
+
+#include <string.h>
+
+#include <talloc/talloc.h>
+#include <types/types.h>
+#include <log/log.h>
+#include <util/util.h>
+#include <i18n/i18n.h>
+
+#include "nc-cui.h"
+#include "nc-textscreen.h"
+#include "nc-statuslog.h"
+
+static const int max_status_entry = 10000;
+
+struct statuslog_entry {
+	struct status		*status;
+	struct list_item	list;
+};
+
+struct statuslog {
+	struct list		status;
+	int			n_status;
+	bool			truncated;
+};
+
+struct statuslog_screen {
+	struct text_screen text_scr;
+};
+
+struct statuslog *statuslog_init(struct cui *cui)
+{
+	struct statuslog *sl;
+
+	sl = talloc(cui, struct statuslog);
+	sl->truncated = false;
+	sl->n_status = 0;
+	list_init(&sl->status);
+
+	return sl;
+}
+
+void statuslog_append_steal(struct cui *cui, struct statuslog *statuslog,
+		struct status *status)
+{
+	struct statuslog_entry *entry;
+
+	entry = talloc(statuslog, struct statuslog_entry);
+	entry->status = status;
+	talloc_steal(statuslog, status);
+
+	list_add_tail(&statuslog->status, &entry->list);
+
+	if (statuslog->n_status >= max_status_entry) {
+		list_remove(&statuslog->status.head);
+		statuslog->truncated = true;
+		statuslog->n_status--;
+	}
+
+	statuslog->n_status++;
+
+	if (cui->statuslog_screen) {
+		text_screen_append_line(&cui->statuslog_screen->text_scr,
+				"%s", status->message);
+		text_screen_draw(&cui->statuslog_screen->text_scr);
+	}
+}
+
+struct statuslog_screen *statuslog_screen_init(struct cui *cui,
+		void (*on_exit)(struct cui *))
+{
+	struct statuslog_screen *screen;
+	struct statuslog_entry *entry;
+	const char *title;
+
+	screen = talloc_zero(cui, struct statuslog_screen);
+
+	title = _("Petitboot status log");
+
+	text_screen_init(&screen->text_scr, cui, title, on_exit);
+	list_for_each_entry(&cui->statuslog->status, entry, list) {
+		text_screen_append_line(&screen->text_scr, "%s",
+				entry->status->message);
+	}
+	text_screen_draw(&screen->text_scr);
+
+	return screen;
+}
+
+struct nc_scr *statuslog_screen_scr(struct statuslog_screen *screen)
+{
+	return text_screen_scr(&screen->text_scr);
+}