ui/ncurses: Abstract text-screen code from sysinfo screen

We want to implement help screens, which are very similar to the sysinfo
screen - show a set of lines, and allow scrolling.

This change splits the text-screen rendering code into a new nc-textinfo
module.

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

1 files changed, 50 insertions, 0 deletions

diff --git a/ui/ncurses/nc-textscreen.h b/ui/ncurses/nc-textscreen.h
new file mode 100644
index 0000000..92c6bfe
--- /dev/null
+++ b/ui/ncurses/nc-textscreen.h
@@ -0,0 +1,50 @@
+/*
+ *  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
+ */
+
+#ifndef _NC_TEXTSCREEN_H
+#define _NC_TEXTSCREEN_H
+
+#include "types/types.h"
+#include "nc-cui.h"
+
+struct text_screen {
+	struct nc_scr	scr;
+	struct cui	*cui;
+	char		**lines;
+	int		n_lines;
+	int		n_alloc_lines;
+	int		scroll_y;
+	void		(*on_exit)(struct cui *);
+};
+
+void text_screen_init(struct text_screen *screen, struct cui *cui,
+		const char *title, void (*on_exit)(struct cui *));
+
+struct text_screen *text_screen_from_scr(struct nc_scr *scr);
+struct nc_scr *text_screen_scr(struct text_screen *screen);
+
+/* content modification */
+void text_screen_clear(struct text_screen *screen);
+void text_screen_append_line(struct text_screen *screen,
+		const char *fmt, ...) __attribute__((format(printf, 2, 3)));
+
+/* interaction */
+void text_screen_process_key(struct nc_scr *scr, int key);
+void text_screen_draw(struct text_screen *screen);
+
+
+#endif /* defined _NC_TEXTSCREEN_H */