diff cpack/dml/lib/termutils.pl @ 0:718306e29690 tip

commiting public release

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cpack/dml/lib/termutils.pl	Tue Feb 09 21:05:06 2016 +0100
@@ -0,0 +1,57 @@
+/* Part of DML (Digital Music Laboratory)
+	Copyright 2014-2015 Samer Abdallah, University of London
+	 
+	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 library; if not, write to the Free Software
+	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+:- module(termutils, 
+   [  with_status_line/1
+   ,  put_cap/2
+   ,  put_cap/1
+   ,  status/2
+   ,  msg/2
+   ,  msg/1
+   ,  heading/2
+   ,  ask/3
+   ]).
+      
+:- meta_predicate with_status_line(0).
+
+put_cap(Cap) :- tty_get_capability(Cap,string,Atom), tty_put(Atom,1).
+put_cap(Cap,Lines) :- tty_get_capability(Cap,string,Atom), tty_put(Atom,Lines).
+
+user:goal_expansion(put_cap(Cap), tty_put(Atom,1)) :-
+	tty_get_capability(Cap,string,Atom).
+user:goal_expansion(put_cap(Cap,Lines), tty_put(Atom,Lines)) :-
+	tty_get_capability(Cap,string,Atom).
+
+with_status_line(Goal) :-
+	stream_property(user_output,buffer(Buff)),
+	tty_size(_,Width), W is Width-1,
+	flag(line_len,_,W),
+	setup_call_cleanup(
+		set_stream(user_output,buffer(false)), (put_cap(cr), call(Goal), status("",[])),
+		set_stream(user_output,buffer(Buff))).
+
+msg(F) :- msg(F,[]).
+msg(F,A) :- format(F,A), nl.
+ask(F,A,Ch) :- format(F,A), flush_output, get_single_char(C), put_char(C), char_code(Ch,C), nl.
+heading(F,A) :- ansi_format([bold],F,A), nl,nl.
+status(F,A) :- 
+	format(string(Msg),F,A), 
+	flag(line_len,MaxLen,MaxLen),
+	string_length(Msg,Len),
+	(Len>MaxLen -> sub_string(Msg,0,MaxLen,_,Msg1); Msg=Msg1),
+	write(Msg1), put_cap(ce), put_cap(cr).