# Term::ANSIColor -- Color screen output using ANSI escape sequences.
-# $Id: ANSIColor.pm,v 1.4 2001/07/10 08:52:05 eagle Exp $
+# $Id: ANSIColor.pm,v 1.10 2005/08/21 18:31:58 eagle Exp $
#
-# Copyright 1996, 1997, 1998, 2000, 2001
-# by Russ Allbery <rra@stanford.edu> and Zenin <zenin@bawdycaste.com>
+# Copyright 1996, 1997, 1998, 2000, 2001, 2002, 2005
+# by Russ Allbery <rra@stanford.edu> and Zenin
#
# This program is free software; you may redistribute it and/or modify it
# under the same terms as Perl itself.
# Ah, September, when the sysadmins turn colors and fall off the trees....
# -- Dave Van Domelen
-############################################################################
+##############################################################################
# Modules and declarations
-############################################################################
+##############################################################################
package Term::ANSIColor;
require 5.001;
@ISA = qw(Exporter);
@EXPORT = qw(color colored);
@EXPORT_OK = qw(uncolor);
-%EXPORT_TAGS = (constants => [qw(CLEAR RESET BOLD UNDERLINE UNDERSCORE BLINK
- REVERSE CONCEALED BLACK RED GREEN YELLOW
- BLUE MAGENTA CYAN WHITE ON_BLACK ON_RED
- ON_GREEN ON_YELLOW ON_BLUE ON_MAGENTA
+%EXPORT_TAGS = (constants => [qw(CLEAR RESET BOLD DARK UNDERLINE UNDERSCORE
+ BLINK REVERSE CONCEALED BLACK RED GREEN
+ YELLOW BLUE MAGENTA CYAN WHITE ON_BLACK
+ ON_RED ON_GREEN ON_YELLOW ON_BLUE ON_MAGENTA
ON_CYAN ON_WHITE)]);
Exporter::export_ok_tags ('constants');
-# Don't use the CVS revision as the version, since this module is also in
-# Perl core and too many things could munge CVS magic revision strings.
-$VERSION = 1.04;
+# Don't use the CVS revision as the version, since this module is also in Perl
+# core and too many things could munge CVS magic revision strings.
+$VERSION = '1.10';
-
-############################################################################
+##############################################################################
# Internal data structures
-############################################################################
+##############################################################################
%attributes = ('clear' => 0,
'reset' => 0,
$attributes_r{$attributes{$_}} = $_;
}
-
-############################################################################
+##############################################################################
# Implementation (constant form)
-############################################################################
+##############################################################################
-# Time to have fun! We now want to define the constant subs, which are
-# named the same as the attributes above but in all caps. Each constant sub
-# needs to act differently depending on whether $AUTORESET is set. Without
+# Time to have fun! We now want to define the constant subs, which are named
+# the same as the attributes above but in all caps. Each constant sub needs
+# to act differently depending on whether $AUTORESET is set. Without
# autoreset:
#
-# BLUE "text\n" ==> "\e[34mtext\n"
+# BLUE "text\n" ==> "\e[34mtext\n"
#
# If $AUTORESET is set, we should instead get:
#
-# BLUE "text\n" ==> "\e[34mtext\n\e[0m"
+# BLUE "text\n" ==> "\e[34mtext\n\e[0m"
#
# The sub also needs to handle the case where it has no arguments correctly.
-# Maintaining all of this as separate subs would be a major nightmare, as
-# well as duplicate the %attributes hash, so instead we define an AUTOLOAD
-# sub to define the constant subs on demand. To do that, we check the name
-# of the called sub against the list of attributes, and if it's an all-caps
-# version of one of them, we define the sub on the fly and then run it.
+# Maintaining all of this as separate subs would be a major nightmare, as well
+# as duplicate the %attributes hash, so instead we define an AUTOLOAD sub to
+# define the constant subs on demand. To do that, we check the name of the
+# called sub against the list of attributes, and if it's an all-caps version
+# of one of them, we define the sub on the fly and then run it.
#
# If the environment variable ANSI_COLORS_DISABLED is set, turn all of the
# generated subs into pass-through functions that don't add any escape
}
}
-
-############################################################################
+##############################################################################
# Implementation (attribute string form)
-############################################################################
+##############################################################################
# Return the escape code for a given set of color attributes.
sub color {
}
# Return a list of named color attributes for a given set of escape codes.
-# Escape sequences can be given with or without enclosing "\e[" and "m".
-# The empty escape sequence '' or "\e[m" gives an empty list of attrs.
+# Escape sequences can be given with or without enclosing "\e[" and "m". The
+# empty escape sequence '' or "\e[m" gives an empty list of attrs.
sub uncolor {
my (@nums, @result);
for (@_) {
# Given a string and a set of attributes, returns the string surrounded by
# escape codes to set those attributes and then clear them at the end of the
# string. The attributes can be given either as an array ref as the first
-# argument or as a list as the second and subsequent arguments. If
-# $EACHLINE is set, insert a reset before each occurrence of the string
-# $EACHLINE and the starting attribute code after the string $EACHLINE, so
-# that no attribute crosses line delimiters (this is often desirable if the
-# output is to be piped to a pager or some other program).
+# argument or as a list as the second and subsequent arguments. If $EACHLINE
+# is set, insert a reset before each occurrence of the string $EACHLINE and
+# the starting attribute code after the string $EACHLINE, so that no attribute
+# crosses line delimiters (this is often desirable if the output is to be
+# piped to a pager or some other program).
sub colored {
my ($string, @codes);
if (ref $_[0]) {
if (defined $EACHLINE) {
my $attr = color (@codes);
join '',
- map { $_ && $_ ne $EACHLINE ? $attr . $_ . "\e[0m" : $_ }
- split (/(\Q$EACHLINE\E)/, $string);
+ map { $_ ne $EACHLINE ? $attr . $_ . "\e[0m" : $_ }
+ grep { length ($_) > 0 }
+ split (/(\Q$EACHLINE\E)/, $string);
} else {
color (@codes) . $string . "\e[0m";
}
}
-
-############################################################################
+##############################################################################
# Module return value and documentation
-############################################################################
+##############################################################################
# Ensure we evaluate to true.
1;
This module has two interfaces, one through color() and colored() and the
other through constants. It also offers the utility function uncolor(),
-which has to be explicitly imported to be used (see L<SYNOPSYS>).
+which has to be explicitly imported to be used (see L<SYNOPSIS>).
color() takes any number of strings as arguments and considers them to be
space-separated lists of attributes. It then forms and returns the escape
Alternately, if you import C<:constants>, you can use the constants CLEAR,
RESET, BOLD, DARK, UNDERLINE, UNDERSCORE, BLINK, REVERSE, CONCEALED, BLACK,
-RED, GREEN, YELLOW, BLUE, MAGENTA, ON_BLACK, ON_RED, ON_GREEN, ON_YELLOW,
-ON_BLUE, ON_MAGENTA, ON_CYAN, and ON_WHITE directly. These are the same as
-color('attribute') and can be used if you prefer typing:
+RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE, ON_BLACK, ON_RED, ON_GREEN,
+ON_YELLOW, ON_BLUE, ON_MAGENTA, ON_CYAN, and ON_WHITE directly. These are
+the same as color('attribute') and can be used if you prefer typing:
print BOLD BLUE ON_WHITE "Text\n", RESET;
interface has the advantage of better compile time error checking, since
misspelled names of colors or attributes in calls to color() and colored()
won't be caught until runtime whereas misspelled names of constants will be
-caught at compile time. So, polute your namespace with almost two dozen
+caught at compile time. So, pollute your namespace with almost two dozen
subroutines that you may not even use that often, or risk a silly bug by
mistyping an attribute. Your choice, TMTOWTDI after all.
constants aren't required, in which case you may feel free to insert commas
unless you're using $Term::ANSIColor::AUTORESET.)
-For easier debuging, you may prefer to always use the commas when not
+For easier debugging, you may prefer to always use the commas when not
setting $Term::ANSIColor::AUTORESET so that you'll get a fatal compile error
rather than a warning.
Note that not all displays are ISO 6429-compliant, or even X3.64-compliant
(or are even attempting to be so). This module will not work as expected on
-displays that do not honor these escape sequences, such as (reportedly) the
-"console" in at least some versions of Windows. They may just be ignored,
-or they may display as an ESC character followed by some apparent garbage.
+displays that do not honor these escape sequences, such as cmd.exe, 4nt.exe,
+and command.com under either Windows NT or Windows 2000. They may just be
+ignored, or they may display as an ESC character followed by some apparent
+garbage.
Jean Delvare provided the following table of different common terminal
-emulators and their support for the various attributes:
+emulators and their support for the various attributes and others have helped
+me flesh it out:
clear bold dark under blink reverse conceal
------------------------------------------------------------------------
dtterm yes yes yes yes reverse yes yes
teraterm yes reverse no yes rev/red yes no
aixterm kinda normal no yes no yes yes
-
-Where the entry is other than yes or no, that emulator interpret the given
-attribute as something else instead. Note that on an aixterm, clear doesn't
-reset colors; you have to explicitly set the colors back to what you want.
-More entries in this table are welcome.
+ PuTTY yes color no yes no yes no
+ Windows yes no no no no yes no
+ Cygwin SSH yes yes no color color color yes
+ Mac Terminal yes yes no yes yes yes yes
+
+Windows is Windows telnet, Cygwin SSH is the OpenSSH implementation under
+Cygwin on Windows NT, and Mac Terminal is the Terminal application in Mac OS
+X. Where the entry is other than yes or no, that emulator displays the
+given attribute as something else instead. Note that on an aixterm, clear
+doesn't reset colors; you have to explicitly set the colors back to what you
+want. More entries in this table are welcome.
Note that codes 3 (italic), 6 (rapid blink), and 9 (strikethrough) are
specified in ANSI X3.64 and ECMA-048 but are not commonly supported by most
=head1 SEE ALSO
ECMA-048 is available on-line (at least at the time of this writing) at
-E<lt>http://www.ecma.ch/ecma1/STAND/ECMA-048.HTME<gt>.
+L<http://www.ecma-international.org/publications/standards/ECMA-048.HTM>.
ISO 6429 is available from ISO for a charge; the author of this module does
not own a copy of it. Since the source material for ISO 6429 was ECMA-048
and the latter is available for free, there seems little reason to obtain
the ISO standard.
+The current version of this module is always available from its web site at
+L<http://www.eyrie.org/~eagle/software/ansicolor/>. It is also part of the
+Perl core distribution as of 5.6.0.
+
=head1 AUTHORS
Original idea (using constants) by Zenin, reimplemented using subs by Russ
-Allbery E<lt>rra@stanford.eduE<gt>, and then combined with the original idea
-by Russ with input from Zenin. Russ Allbery now maintains this module.
+Allbery <rra@stanford.edu>, and then combined with the original idea by Russ
+with input from Zenin. Russ Allbery now maintains this module.
-=head1 LICENSE
+=head1 COPYRIGHT AND LICENSE
-Copyright 1996, 1997, 1998, 2000, 2001 Russ Allbery <rra@stanford.edu> and
-Zenin <zenin@bawdycaste.org>. This program is free software; you may
-redistribute it and/or modify it under the same terms as Perl itself.
+Copyright 1996, 1997, 1998, 2000, 2001, 2002 Russ Allbery <rra@stanford.edu>
+and Zenin. This program is free software; you may redistribute it and/or
+modify it under the same terms as Perl itself.
=cut
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