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package Pod::Perldoc::ToTerm;
use strict;
use warnings;
use vars qw($VERSION);
$VERSION = '3.28';
use parent qw(Pod::Perldoc::BaseTo);
sub is_pageable { 1 }
sub write_with_binmode { 0 }
sub output_extension { 'txt' }
use Pod::Text::Termcap ();
sub alt { shift->_perldoc_elem('alt' , @_) }
sub indent { shift->_perldoc_elem('indent' , @_) }
sub loose { shift->_perldoc_elem('loose' , @_) }
sub quotes { shift->_perldoc_elem('quotes' , @_) }
sub sentence { shift->_perldoc_elem('sentence', @_) }
sub width {
my $self = shift;
$self->_perldoc_elem('width' , @_) ||
$self->_get_columns_from_manwidth ||
$self->_get_columns_from_stty ||
$self->_get_default_width;
}
sub pager_configuration {
my($self, $pager, $perldoc) = @_;
# do not modify anything on Windows or DOS
return if ( $perldoc->is_mswin32 || $perldoc->is_dos );
if ( $pager =~ /less/ ) {
$self->_maybe_modify_environment('LESS');
}
elsif ( $pager =~ /more/ ) {
$self->_maybe_modify_environment('MORE');
}
return;
}
sub _maybe_modify_environment {
my($self, $name) = @_;
if ( ! defined $ENV{$name} ) {
$ENV{$name} = "-R";
}
# if the environment is set, don't modify
# anything
}
sub _get_stty { `stty -a` }
sub _get_columns_from_stty {
my $output = $_[0]->_get_stty;
if( $output =~ /\bcolumns\s+(\d+)/ ) { return $1; }
elsif( $output =~ /;\s*(\d+)\s+columns;/ ) { return $1; }
else { return 0 }
}
sub _get_columns_from_manwidth {
my( $self ) = @_;
return 0 unless defined $ENV{MANWIDTH};
unless( $ENV{MANWIDTH} =~ m/\A\d+\z/ ) {
$self->warn( "Ignoring non-numeric MANWIDTH ($ENV{MANWIDTH})\n" );
return 0;
}
if( $ENV{MANWIDTH} == 0 ) {
$self->warn( "Ignoring MANWIDTH of 0. Really? Why even run the program? :)\n" );
return 0;
}
if( $ENV{MANWIDTH} =~ m/\A(\d+)\z/ ) { return $1 }
return 0;
}
sub _get_default_width {
76
}
sub new { return bless {}, ref($_[0]) || $_[0] }
sub parse_from_file {
my $self = shift;
$self->{width} = $self->width();
my @options =
map {; $_, $self->{$_} }
grep !m/^_/s,
keys %$self
;
defined(&Pod::Perldoc::DEBUG)
and Pod::Perldoc::DEBUG()
and print "About to call new Pod::Text::Termcap ",
$Pod::Text::VERSION ? "(v$Pod::Text::Termcap::VERSION) " : '',
"with options: ",
@options ? "[@options]" : "(nil)", "\n";
;
Pod::Text::Termcap->new(@options)->parse_from_file(@_);
}
1;
=head1 NAME
Pod::Perldoc::ToTerm - render Pod with terminal escapes
=head1 SYNOPSIS
perldoc -o term Some::Modulename
=head1 DESCRIPTION
This is a "plug-in" class that allows Perldoc to use
Pod::Text as a formatter class.
It supports the following options, which are explained in
L<Pod::Text>: alt, indent, loose, quotes, sentence, width
For example:
perldoc -o term -w indent:5 Some::Modulename
=head1 PAGER FORMATTING
Depending on the platform, and because this class emits terminal escapes it
will attempt to set the C<-R> flag on your pager by injecting the flag into
your environment variable for C<less> or C<more>.
On Windows and DOS, this class will not modify any environment variables.
=head1 CAVEAT
This module may change to use a different text formatter class in the
future, and this may change what options are supported.
=head1 SEE ALSO
L<Pod::Text>, L<Pod::Text::Termcap>, L<Pod::Perldoc>
=head1 COPYRIGHT AND DISCLAIMERS
Copyright (c) 2017 Mark Allen.
This program is free software; you can redistribute it and/or modify it
under the terms of either: the GNU General Public License as published
by the Free Software Foundation; or the Artistic License.
See http://dev.perl.org/licenses/ for more information.
=head1 AUTHOR
Mark Allen C<< <mallen@cpan.org> >>
=cut