Split up huge Top module into smaller modules.

[virt-top.git] / src / screen.ml

diff --git a/src/screen.ml b/src/screen.ml
new file mode 100644 (file)
index 0000000..0d847a2
--- /dev/null
+++ b/src/screen.ml
@@ -0,0 +1,52 @@
+(* 'top'-like tool for libvirt domains.
+   (C) Copyright 2007-2017 Richard W.M. Jones, Red Hat Inc.
+   http://libvirt.org/
+
+   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; either version 2 of the License, or
+   (at your option) any later version.
+
+   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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*)
+
+(* The virt-top screen layout. *)
+
+open Curses
+
+module D = Libvirt.Domain
+
+(* Line numbers. *)
+let top_lineno = 0
+let summary_lineno = 1 (* this takes 2 lines *)
+let message_lineno = 3
+let header_lineno = 4
+let domains_lineno = 5
+
+(* Easier to use versions of curses functions addstr, mvaddstr, etc. *)
+let move y x = ignore (move y x)
+let refresh () = ignore (refresh ())
+let addch c = ignore (addch (int_of_char c))
+let addstr s = ignore (addstr s)
+let mvaddstr y x s = ignore (mvaddstr y x s)
+
+(* Print in the "message area". *)
+let clear_msg () = move message_lineno 0; clrtoeol ()
+let print_msg str = clear_msg (); mvaddstr message_lineno 0 str
+
+(* Show a libvirt domain state (the 'S' column). *)
+let show_state = function
+  | D.InfoNoState -> '?'
+  | D.InfoRunning -> 'R'
+  | D.InfoBlocked -> 'S'
+  | D.InfoPaused -> 'P'
+  | D.InfoShutdown -> 'D'
+  | D.InfoShutoff -> 'O'
+  | D.InfoCrashed -> 'X'