File Coverage

blib/lib/Pod/Text/Termcap.pm

Criterion	Covered	Total	%
statement	68	74	91.8
branch	4	10	40.0
condition	5	13	38.4
subroutine	14	15	93.3
pod	1	8	12.5
total	92	120	76.6

# Pod::Text::Termcap -- Convert POD data to ASCII text with format escapes.
#
# This is a simple subclass of Pod::Text that overrides a few key methods to
# output the right termcap escape sequences for formatted text on the current
# terminal type.
#
# Copyright 1999, 2001, 2002, 2004, 2006, 2008, 2009, 2014, 2015
#     Russ Allbery
#
# This program is free software; you may redistribute it and/or modify it
# under the same terms as Perl itself.

##############################################################################
# Modules and declarations
##############################################################################

package Pod::Text::Termcap;

use 5.006;
use strict;
use warnings;

use Pod::Text ();
use POSIX ();
use Term::Cap;

use vars qw(@ISA $VERSION);

@ISA = qw(Pod::Text);

$VERSION = '4.08';

##############################################################################
# Overrides
##############################################################################

# In the initialization method, grab our terminal characteristics as well as
# do all the stuff we normally do.
sub new {
    my ($self, @args) = @_;
    my ($ospeed, $term, $termios);
    $self = $self->SUPER::new (@args);

    # $ENV{HOME} is usually not set on Windows.  The default Term::Cap path
    # may not work on Solaris.
    unless (exists $ENV{TERMPATH}) {
        my $home = exists $ENV{HOME} ? "$ENV{HOME}/.termcap:" : '';
        $ENV{TERMPATH} =
          "${home}/etc/termcap:/usr/share/misc/termcap:/usr/share/lib/termcap";
    }

    # Fall back on a hard-coded terminal speed if POSIX::Termios isn't
    # available (such as on VMS).
    eval { $termios = POSIX::Termios->new };
    if ($@) {
        $ospeed = 9600;
    } else {
        $termios->getattr;
        $ospeed = $termios->getospeed || 9600;
    }

    # Fall back on the ANSI escape sequences if Term::Cap doesn't work.
    eval { $term = Tgetent Term::Cap { TERM => undef, OSPEED => $ospeed } };
    $$self{BOLD} = $$term{_md} || "\e[1m";
    $$self{UNDL} = $$term{_us} || "\e[4m";
    $$self{NORM} = $$term{_me} || "\e[m";

    unless (defined $$self{width}) {
        $$self{opt_width} = $ENV{COLUMNS} || $$term{_co} || 80;
        $$self{opt_width} -= 2;
    }

    return $self;
}

# Make level one headings bold.
sub cmd_head1 {
    my ($self, $attrs, $text) = @_;
    $text =~ s/\s+$//;
    $self->SUPER::cmd_head1 ($attrs, "$$self{BOLD}$text$$self{NORM}");
}

# Make level two headings bold.
sub cmd_head2 {
    my ($self, $attrs, $text) = @_;
    $text =~ s/\s+$//;
    $self->SUPER::cmd_head2 ($attrs, "$$self{BOLD}$text$$self{NORM}");
}

# Fix up B<> and I<>.  Note that we intentionally don't do F<>.
sub cmd_b { my $self = shift; return "$$self{BOLD}$_[1]$$self{NORM}" }
sub cmd_i { my $self = shift; return "$$self{UNDL}$_[1]$$self{NORM}" }

# Output any included code in bold.
sub output_code {
    my ($self, $code) = @_;
    $self->output ($$self{BOLD} . $code . $$self{NORM});
}

# Strip all of the formatting from a provided string, returning the stripped
# version.
sub strip_format {
    my ($self, $text) = @_;
    $text =~ s/\Q$$self{BOLD}//g;
    $text =~ s/\Q$$self{UNDL}//g;
    $text =~ s/\Q$$self{NORM}//g;
    return $text;
}

# Override the wrapping code to ignore the special sequences.
sub wrap {
    my $self = shift;
    local $_ = shift;
    my $output = '';
    my $spaces = ' ' x $$self{MARGIN};
    my $width = $$self{opt_width} - $$self{MARGIN};

    # $codes matches a single special sequence.  $char matches any number of
    # special sequences preceding a single character other than a newline.
    # We have to do $shortchar and $longchar in variables because the
    # construct ${char}{0,$width} didn't do the right thing until Perl 5.8.x.
    my $codes = "(?:\Q$$self{BOLD}\E|\Q$$self{UNDL}\E|\Q$$self{NORM}\E)";
    my $char = "(?:$codes*[^\\n])";
    my $shortchar = $char . "{0,$width}";
    my $longchar = $char . "{$width}";
    while (length > $width) {
        if (s/^($shortchar)\s+// || s/^($longchar)//) {
            $output .= $spaces . $1 . "\n";
        } else {
            last;
        }
    }
    $output .= $spaces . $_;
    $output =~ s/\s+$/\n\n/;
    return $output;
}

##############################################################################
# Module return value and documentation
##############################################################################

1;
__END__