/usr/lib/swi-prolog/library/ansi_term.pl is in swi-prolog-nox 5.10.4-3ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | /* Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: J.Wielemaker@cs.vu.nl
WWW: http://www.swi-prolog.org
Copyright (C): 2010, VU University Amsterdam
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
As a special exception, if you link this library with other files,
compiled with a Free Software compiler, to produce an executable, this
library does not by itself cause the resulting executable to be covered
by the GNU General Public License. This exception does not however
invalidate any other reasons why the executable file might be covered by
the GNU General Public License.
*/
:- module(ansi_term,
[ ansi_format/3 % +Attr, +Format, +Args
]).
:- use_module(library(apply)).
/** <module> Print decorated text to ANSI consoles
This library allows for exploiting the color and attribute facilities of
most modern terminals using ANSI escape sequences.
@see http://en.wikipedia.org/wiki/ANSI_escape_code
@bug The Windows console (swipl-win) does not (yet) support ANSI (color)
codes.
*/
:- create_prolog_flag(color_term, true, [type(boolean)]).
%% ansi_format(+Attributes, +Format, +Args) is det.
%
% Format text with ANSI attributes. This predicate behaves as
% format/2 using Format and Args, but if the =current_output= is a
% terminal, it adds ANSI escape sequences according to Attributes.
% For example, to print a text in bold cyan, do
%
% ==
% ?- ansi_format([bold,fg(cyan)], 'Hello ~w', [world]).
% ==
%
% Attributes is either a single attribute or a list thereof. The
% attribute names are derived from the ANSI specification. See the
% source for sgr_code/2 for details. Some commonly used attributes
% are:
%
% - bold
% - underline
% - fg(Color), bg(Color), hfg(Color), hbg(Color)
%
% Defined color constants are below. =default= can be used to
% access the default color of the terminal.
%
% - black, red, green, yellow, blue, magenta, cyan, white
%
% ANSI sequences are omitted if and only if
%
% - The =current_output= has the property tty(true) (see
% stream_property/2).
% - The Prolog flag =color_term= is =true=.
ansi_format(Attr, Format, Args) :-
ansi_format(current_output, Attr, Format, Args).
ansi_format(Stream, Attr, Format, Args) :-
stream_property(Stream, tty(true)),
current_prolog_flag(color_term, true), !,
( is_list(Attr)
-> maplist(sgr_code, Attr, Codes),
atomic_list_concat(Codes, ;, Code)
; sgr_code(Attr, Code)
),
( Args == []
-> format(Stream, '\u001B[~wm~w\u001B[0m', [Code, Format])
; format(string(Fmt), '\u001B[~~wm~w\u001B[0m', [Format]),
format(Stream, Fmt, [Code|Args])
).
ansi_format(Stream, _Attr, Format, Args) :-
format(Stream, Format, Args).
sgr_code(reset, 0).
sgr_code(bold, 1).
sgr_code(faint, 2).
sgr_code(italic, 3).
sgr_code(underline, 4).
sgr_code(blink(slow), 5).
sgr_code(blink(rapid), 6).
sgr_code(negative, 7).
sgr_code(conceal, 8).
sgr_code(crossed_out, 9).
sgr_code(font(primary), 10) :- !.
sgr_code(font(N), C) :-
C is 10+N.
sgr_code(franktur, 20).
sgr_code(underline(double), 21).
sgr_code(intensity(normal), 22).
sgr_code(fg(Name), C) :-
ansi_color(Name, N),
C is N+30.
sgr_code(bg(Name), C) :- !,
ansi_color(Name, N),
C is N+40.
sgr_code(framed, 51).
sgr_code(encircled, 52).
sgr_code(overlined, 53).
sgr_code(ideogram(underline), 60).
sgr_code(right_side_line, 60).
sgr_code(ideogram(underline(double)), 61).
sgr_code(right_side_line(double), 61).
sgr_code(ideogram(overlined), 62).
sgr_code(left_side_line, 62).
sgr_code(ideogram(stress_marking), 64).
sgr_code(-X, Code) :-
off_code(X, Code).
sgr_code(hfg(Name), C) :-
ansi_color(Name, N),
C is N+90.
sgr_code(hbg(Name), C) :- !,
ansi_color(Name, N),
C is N+100.
off_code(italic_and_franktur, 23).
off_code(underline, 24).
off_code(blink, 25).
off_code(negative, 27).
off_code(conceal, 28).
off_code(crossed_out, 29).
off_code(framed, 54).
off_code(overlined, 55).
ansi_color(black, 0).
ansi_color(red, 1).
ansi_color(green, 2).
ansi_color(yellow, 3).
ansi_color(blue, 4).
ansi_color(magenta, 5).
ansi_color(cyan, 6).
ansi_color(white, 7).
ansi_color(default, 9).
/*******************************
* HOOK *
*******************************/
%% prolog:message_line_element(+Stream, +Term) is semidet.
%
% Hook implementation that deals with ansi(+Attr, +Fmt, +Args) in
% message specifications.
prolog:message_line_element(S, ansi(Attr, Fmt, Args)) :-
ansi_format(S, Attr, Fmt, Args).
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