Na}{

File Content: `ToMan.pm`

require 5.006;
package Pod::Perldoc::ToMan;
use strict;
use warnings;
use parent qw(Pod::Perldoc::BaseTo);

use vars qw($VERSION);
$VERSION = '3.28';

use File::Spec::Functions qw(catfile);
use Pod::Man 2.18;
# This class is unlike ToText.pm et al, because we're NOT paging thru
# the output in our particular format -- we make the output and
# then we run nroff (or whatever) on it, and then page thru the
# (plaintext) output of THAT!

sub SUCCESS () { 1 }
sub FAILED  () { 0 }

sub is_pageable        { 1 }
sub write_with_binmode { 0 }
sub output_extension   { 'txt' }

sub __filter_nroff  { shift->_perldoc_elem('__filter_nroff'  , @_) }
sub __nroffer       { shift->_perldoc_elem('__nroffer'       , @_) }
sub __bindir        { shift->_perldoc_elem('__bindir'        , @_) }
sub __pod2man       { shift->_perldoc_elem('__pod2man'       , @_) }
sub __output_file   { shift->_perldoc_elem('__output_file'   , @_) }

sub center          { shift->_perldoc_elem('center'         , @_) }
sub date            { shift->_perldoc_elem('date'           , @_) }
sub fixed           { shift->_perldoc_elem('fixed'          , @_) }
sub fixedbold       { shift->_perldoc_elem('fixedbold'      , @_) }
sub fixeditalic     { shift->_perldoc_elem('fixeditalic'    , @_) }
sub fixedbolditalic { shift->_perldoc_elem('fixedbolditalic', @_) }
sub name            { shift->_perldoc_elem('name'           , @_) }
sub quotes          { shift->_perldoc_elem('quotes'         , @_) }
sub release         { shift->_perldoc_elem('release'        , @_) }
sub section         { shift->_perldoc_elem('section'        , @_) }

sub new {
	my( $either ) = shift;
	my $self = bless {}, ref($either) || $either;
	$self->init( @_ );
	return $self;
	}

sub init {
	my( $self, @args ) = @_;

	unless( $self->__nroffer ) {
		my $roffer = $self->_find_roffer( $self->_roffer_candidates );
		$self->debug( "Using $roffer\n" );
		$self->__nroffer( $roffer );
		}
    else {
	    $self->debug( "__nroffer is " . $self->__nroffer() . "\n" );
        }

	$self->_check_nroffer;
	}

sub _roffer_candidates {
	my( $self ) = @_;

	if( $self->is_openbsd || $self->is_freebsd || $self->is_bitrig ) { qw( mandoc groff nroff ) }
	else                    { qw( groff nroff mandoc ) }
	}

sub _find_roffer {
	my( $self, @candidates ) = @_;

	my @found = ();
	foreach my $candidate ( @candidates ) {
		push @found, $self->_find_executable_in_path( $candidate );
		}

	return wantarray ? @found : $found[0];
	}

sub _check_nroffer {
	return 1;
	# where is it in the PATH?

	# is it executable?

	# what is its real name?

	# what is its version?

	# does it support the flags we need?

	# is it good enough for us?
	}

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 {
	73
	}

sub _get_columns {
	$_[0]->_get_columns_from_manwidth ||
	$_[0]->_get_columns_from_stty     ||
	$_[0]->_get_default_width;
	}

sub _get_podman_switches {
	my( $self ) = @_;

	my @switches = map { $_, $self->{$_} } grep !m/^_/s, keys %$self;

    # There needs to be a cleaner way to handle setting
    # the UTF-8 flag, but for now, comment out this
    # line because it often does the wrong thing.
    #
    # See RT #77465
    #
    #push @switches, 'utf8' => 1;

	$self->debug( "Pod::Man switches are [@switches]\n" );

	return @switches;
	}

sub _parse_with_pod_man {
	my( $self, $file ) = @_;

	#->output_fh and ->output_string from Pod::Simple aren't
	# working, apparently, so there's this ugly hack:
	local *STDOUT;
	open STDOUT, '>', $self->{_text_ref};
	my $parser = Pod::Man->new( $self->_get_podman_switches );
	$self->debug( "Parsing $file\n" );
	$parser->parse_from_file( $file );
	$self->debug( "Done parsing $file\n" );
	close STDOUT;

	$self->die( "No output from Pod::Man!\n" )
		unless length $self->{_text_ref};

	$self->_save_pod_man_output if $self->debugging;

	return SUCCESS;
	}

sub _save_pod_man_output {
	my( $self, $fh ) = @_;

	$fh = do {
		my $file = "podman.out.$$.txt";
		$self->debug( "Writing $file with Pod::Man output\n" );
		open my $fh2, '>', $file;
		$fh2;
		} unless $fh;

	print { $fh } ${ $self->{_text_ref} };
	}

sub _have_groff_with_utf8 {
	my( $self ) = @_;

	return 0 unless $self->_is_groff;
	my $roffer = $self->__nroffer;

	my $minimum_groff_version = '1.20.1';

	my $version_string = `$roffer -v`;
	my( $version ) = $version_string =~ /\(?groff\)? version (\d+\.\d+(?:\.\d+)?)/;
	$self->debug( "Found groff $version\n" );

	# is a string comparison good enough?
	if( $version lt $minimum_groff_version ) {
		$self->warn(
			"You have an old groff." .
			" Update to version $minimum_groff_version for good Unicode support.\n" .
			"If you don't upgrade, wide characters may come out oddly.\n"
			 );
		}

	$version ge $minimum_groff_version;
	}

sub _have_mandoc_with_utf8 {
	my( $self ) = @_;

       $self->_is_mandoc and not system 'mandoc -Tlocale -V > /dev/null 2>&1';
	}

sub _collect_nroff_switches {
	my( $self ) = shift;

    my @render_switches = ('-man', $self->_get_device_switches);

	# Thanks to Brendan O'Dea for contributing the following block
	if( $self->_is_roff and -t STDOUT and my ($cols) = $self->_get_columns ) {
		my $c = $cols * 39 / 40;
		$cols = $c > $cols - 2 ? $c : $cols -2;
		push @render_switches, '-rLL=' . (int $c) . 'n' if $cols > 80;
		}

	# I hear persistent reports that adding a -c switch to $render
	# solves many people's problems.  But I also hear that some mans
	# don't have a -c switch, so that unconditionally adding it here
	# would presumably be a Bad Thing   -- sburke@cpan.org
    push @render_switches, '-c' if( $self->_is_roff and $self->is_cygwin );

	return @render_switches;
	}

sub _get_device_switches {
	my( $self ) = @_;

	   if( $self->_is_nroff  )             { qw()              }
	elsif( $self->_have_groff_with_utf8 )  { qw(-Kutf8 -Tutf8) }
	elsif( $self->_is_ebcdic )             { qw(-Tcp1047)      }
	elsif( $self->_have_mandoc_with_utf8 ) { qw(-Tlocale)      }
	elsif( $self->_is_mandoc )             { qw()              }
	else                                   { qw(-Tlatin1)      }
	}

sub _is_roff {
	my( $self ) = @_;

	$self->_is_nroff or $self->_is_groff;
	}

sub _is_nroff {
	my( $self ) = @_;

	$self->__nroffer =~ /\bnroff\b/;
	}

sub _is_groff {
	my( $self ) = @_;

	$self->__nroffer =~ /\bgroff\b/;
	}

sub _is_mandoc {
	my ( $self ) = @_;

	$self->__nroffer =~ /\bmandoc\b/;
	}

sub _is_ebcdic {
	my( $self ) = @_;

	return 0;
	}
	
sub _filter_through_nroff {
	my( $self ) = shift;
	$self->debug( "Filtering through " . $self->__nroffer() . "\n" );

    # Maybe someone set rendering switches as part of the opt_n value
    # Deal with that here.

    my ($render, $switches) = $self->__nroffer() =~ /\A([\/a-zA-Z0-9_\.-]+)\b(.+)?\z/;

    $self->die("no nroffer!?") unless $render;
    my @render_switches = $self->_collect_nroff_switches;

    if ( $switches ) {
        # Eliminate whitespace 
        $switches =~ s/\s//g;

        # Then separate the switches with a zero-width positive 
        # lookahead on the dash.
        #
        # See:
        # http://www.effectiveperlprogramming.com/blog/1411
        # for a good discussion of this technique

        push @render_switches, split(/(?=-)/, $switches);
        }

	$self->debug( "render is $render\n" );
	$self->debug( "render options are @render_switches\n" );

	require Symbol;
	require IPC::Open3;
	require IO::Handle;

	my $pid = IPC::Open3::open3(
		my $writer,
		my $reader,
		my $err = Symbol::gensym(),
		$render,
		@render_switches
		);

	$reader->autoflush(1);

	use IO::Select;
	my $selector = IO::Select->new( $reader );

	$self->debug( "Writing to pipe to $render\n" );

	my $offset = 0;
	my $chunk_size = 4096;
	my $length = length( ${ $self->{_text_ref} } );
	my $chunks = $length / $chunk_size;
	my $done;
	my $buffer;
	while( $offset <= $length ) {
		$self->debug( "Writing chunk $chunks\n" ); $chunks++;
		syswrite $writer, ${ $self->{_text_ref} }, $chunk_size, $offset
			or $self->die( $! );
		$offset += $chunk_size;
		$self->debug( "Checking read\n" );
		READ: {
			last READ unless $selector->can_read( 0.01 );
			$self->debug( "Reading\n" );
			my $bytes = sysread $reader, $buffer, 4096;
			$self->debug( "Read $bytes bytes\n" );
			$done .= $buffer;
			$self->debug( sprintf "Output is %d bytes\n",
				length $done
				);
			next READ;
			}
		}
	close $writer;
	$self->debug( "Done writing\n" );

	# read any leftovers
	$done .= do { local $/; <$reader> };
	$self->debug( sprintf "Done reading. Output is %d bytes\n",
		length $done
		);

	if( $? ) {
		$self->warn( "Error from pipe to $render!\n" );
		$self->debug( 'Error: ' . do { local $/; <$err> } );
		}


	close $reader;
	if( my $err = $? ) {
		$self->debug(
			"Nonzero exit ($?) while running `$render @render_switches`.\n" .
			"Falling back to Pod::Perldoc::ToPod\n"
			);
		return $self->_fallback_to_pod( @_ );
		}

	$self->debug( "Output:\n----\n$done\n----\n" );

	${ $self->{_text_ref} } = $done;

	return length ${ $self->{_text_ref} } ? SUCCESS : FAILED;
	}

sub parse_from_file {
	my( $self, $file, $outfh) = @_;

	# We have a pipeline of filters each affecting the reference
	# in $self->{_text_ref}
	$self->{_text_ref} = \my $output;

	$self->_parse_with_pod_man( $file );
	# so far, nroff is an external command so we ensure it worked
	my $result = $self->_filter_through_nroff;
	return $self->_fallback_to_pod( @_ ) unless $result == SUCCESS;

	$self->_post_nroff_processing;

	print { $outfh } $output or
		$self->die( "Can't print to $$self{__output_file}: $!" );

	return;
	}

sub _fallback_to_pod {
	my( $self, @args ) = @_;
	$self->warn( "Falling back to Pod because there was a problem!\n" );
	require Pod::Perldoc::ToPod;
	return  Pod::Perldoc::ToPod->new->parse_from_file(@_);
	}

# maybe there's a user setting we should check?
sub _get_tab_width { 4 }

sub _expand_tabs {
	my( $self ) = @_;

	my $tab_width = ' ' x $self->_get_tab_width;

	${ $self->{_text_ref} } =~ s/\t/$tab_width/g;
	}

sub _post_nroff_processing {
	my( $self ) = @_;

	if( $self->is_hpux ) {
	    $self->debug( "On HP-UX, I'm going to expand tabs for you\n" );
		# this used to be a pipe to `col -x` for HP-UX
		$self->_expand_tabs;
		}

	if( $self->{'__filter_nroff'} ) {
		$self->debug( "filter_nroff is set, so filtering\n" );
		$self->_remove_nroff_header;
		$self->_remove_nroff_footer;
		}
	else {
		$self->debug( "filter_nroff is not set, so not filtering\n" );
		}

	$self->_handle_unicode;

	return 1;
	}

# I don't think this does anything since there aren't two consecutive
# newlines in the Pod::Man output
sub _remove_nroff_header {
	my( $self ) = @_;
	$self->debug( "_remove_nroff_header is still a stub!\n" );
	return 1;

#  my @data = split /\n{2,}/, shift;
#  shift @data while @data and $data[0] !~ /\S/; # Go to header
#  shift @data if @data and $data[0] =~ /Contributed\s+Perl/; # Skip header
	}

# I don't think this does anything since there aren't two consecutive
# newlines in the Pod::Man output
sub _remove_nroff_footer {
	my( $self ) = @_;
	$self->debug( "_remove_nroff_footer is still a stub!\n" );
	return 1;
	${ $self->{_text_ref} } =~ s/\n\n+.*\w.*\Z//m;

#  my @data = split /\n{2,}/, shift;
#  pop @data if @data and $data[-1] =~ /^\w/; # Skip footer, like
        # 28/Jan/99 perl 5.005, patch 53 1
	}

sub _unicode_already_handled {
	my( $self ) = @_;

	$self->_have_groff_with_utf8 ||
	1  # so, we don't have a case that needs _handle_unicode
	;
	}

sub _handle_unicode {
# this is the job of preconv
# we don't need this with groff 1.20 and later.
	my( $self ) = @_;

	return 1 if $self->_unicode_already_handled;

	require Encode;

	# it's UTF-8 here, but we need character data
	my $text = Encode::decode( 'UTF-8', ${ $self->{_text_ref} } ) ;

# http://www.mail-archive.com/groff@gnu.org/msg01378.html
# http://linux.die.net/man/7/groff_char
# http://www.gnu.org/software/groff/manual/html_node/Using-Symbols.html
# http://lists.gnu.org/archive/html/groff/2011-05/msg00007.html
# http://www.simplicidade.org/notes/archives/2009/05/fixing_the_pod.html
# http://lists.freebsd.org/pipermail/freebsd-questions/2011-July/232239.html
	$text =~ s/(\P{ASCII})/
		sprintf '\\[u%04X]', ord $1
	     /eg;

	# should we encode?
	${ $self->{_text_ref} } = $text;
	}

1;

__END__

=head1 NAME

Pod::Perldoc::ToMan - let Perldoc render Pod as man pages

=head1 SYNOPSIS

  perldoc -o man Some::Modulename

=head1 DESCRIPTION

This is a "plug-in" class that allows Perldoc to use
Pod::Man and C<groff> for reading Pod pages.

The following options are supported:  center, date, fixed, fixedbold,
fixeditalic, fixedbolditalic, quotes, release, section

(Those options are explained in L<Pod::Man>.)

For example:

  perldoc -o man -w center:Pod Some::Modulename

=head1 CAVEAT

This module may change to use a different pod-to-nroff formatter class
in the future, and this may change what options are supported.

=head1 SEE ALSO

L<Pod::Man>, L<Pod::Perldoc>, L<Pod::Perldoc::ToNroff>

=head1 COPYRIGHT AND DISCLAIMERS

Copyright (c) 2011 brian d foy. All rights reserved.

Copyright (c) 2002,3,4 Sean M. Burke.  All rights reserved.

This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

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.

=head1 AUTHOR

Current maintainer: Mark Allen C<< <mallen@cpan.org> >>

Past contributions from:
brian d foy C<< <bdfoy@cpan.org> >>
Adriano R. Ferreira C<< <ferreira@cpan.org> >>,
Sean M. Burke C<< <sburke@cpan.org> >>

=cut
Name	Size	Permission
BaseTo.pm	3637 bytes	0644
GetOptsOO.pm	3888 bytes	0644
ToANSI.pm	2303 bytes	0644
ToChecker.pm	1691 bytes	0644
ToMan.pm	14248 bytes	0644
ToNroff.pm	2782 bytes	0644
ToPod.pm	1959 bytes	0644
ToRtf.pm	2149 bytes	0644
ToTerm.pm	3816 bytes	0644
ToText.pm	2266 bytes	0644
ToTk.pm	4000 bytes	0644
ToXml.pm	1407 bytes	0644
File Content: ToMan.pm

File Content: `ToMan.pm`
