File Coverage

blib/lib/HTML/FormatText/Lynx.pm

Criterion	Covered	Total	%
statement	33	53	62.2
branch	1	18	5.5
condition	1	3	33.3
subroutine	10	11	90.9
pod	2	2	100.0
total	47	87	54.0

# Copyright 2008, 2009, 2010, 2013, 2015 Kevin Ryde

# HTML-FormatExternal 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 3, or (at your option) any
# later version.
#
# HTML-FormatExternal 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 HTML-FormatExternal.  If not, see .

package HTML::FormatText::Lynx;
use 5.006;
use strict;
use warnings;
use URI::file;
use HTML::FormatExternal;
our @ISA = ('HTML::FormatExternal');

our $VERSION = 24;

use constant DEFAULT_LEFTMARGIN => 2;
use constant DEFAULT_RIGHTMARGIN => 72;

# return true if the "-nomargins" option is available (new in Lynx
# 2.8.6dev.12 from June 2005)
use constant::defer _have_nomargins => sub {
  my ($class) = @_;
  my $help = $class->_run_version (['lynx', '-help']);
  return (defined $help && $help =~ /-nomargins/);
};

sub program_full_version {
  my ($self_or_class) = @_;
  return $self_or_class->_run_version (['lynx', '-version']);
}
sub program_version {
  my ($self_or_class) = @_;
  my $version = $self_or_class->program_full_version;
  if (! defined $version) { return undef; }

  # eg. "Lynx Version 2.8.7dev.10 (21 Sep 2008)"
  $version =~ /^Lynx Version (.*?) \(/i
    or $version =~ /^(.*)/;  # whole first line if format not recognised
  return $1 . substr($version,0,0);  # retain taintedness
}

sub _make_run {
  my ($class, $input_filename, $options) = @_;
  my @command = ('lynx', '-dump', '-force_html');

  if (defined $options->{'_width'}) {
    push @command, '-width', $options->{'_width'};
    if ($class->_have_nomargins) {
      push @command, '-nomargins';
    }
  }
  if (my $input_charset = $options->{'input_charset'}) {
    push @command, '-assume_charset', $input_charset;
  }
  if (my $output_charset = $options->{'output_charset'}) {
    push @command, '-display_charset', $output_charset;
  }
  if ($options->{'justify'}) {
    push @command, '-justify';
  }
  if ($options->{'unique_links'}) {
    push @command, '-unique_urls';
  }


  # -underscore gives _foo_ style for  underline, though it seems to need
  # -with_backspaces to come out.  It doesn't use backspaces it seems,
  # unlike the name would suggest ...

  # 'lynx_options' not documented ...
  push @command, @{$options->{'lynx_options'} || []};

  # "lynx -" means read standard input.
  # Any other "-foo" is an option.
  # Recent lynx has "--" to mean end of options, but not circa 2.8.6.
  # "lynx dir/http:" attempts to connect to something.
  # Escape all this by URI::file.
  push @command, URI::file->new_abs($input_filename)->as_string;

  return (\@command);
}

1;
__END__