package Pod::PseudoPod::HTML;
use strict;
use vars qw( $VERSION );
$VERSION = '0.12';
use Carp ();
use base qw( Pod::PseudoPod );

use Text::Wrap 98.112902 ();
$Text::Wrap::wrap = 'overflow';
use HTML::Entities 'encode_entities';

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

sub new {
  my $self = shift;
  my $new = $self->SUPER::new(@_);
  $new->{'output_fh'} ||= *STDOUT{IO};
  $new->accept_targets( 'html', 'HTML' );
  $new->accept_targets_as_text( qw(author blockquote comment caution
      editor epigraph example figure important listing literal note
      production programlisting screen sidebar table tip warning) );

  $new->nix_X_codes(1);
  $new->nbsp_for_S(1);
  $new->add_css_tags(0);
  $new->add_body_tags(0);
  $new->codes_in_verbatim(1);
  $new->{'scratch'} = '';
  return $new;
}

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

sub handle_text {
    # escape special characters in HTML (<, >, &, etc)
    $_[0]{'scratch'} .= $_[0]{'in_verbatim'} ? encode_entities( $_[1] ) : $_[1]
}

sub start_Para     { $_[0]{'scratch'} = '<p>' }
sub start_Verbatim { $_[0]{'scratch'} = '<pre><code>'; $_[0]{'in_verbatim'} = 1}

sub start_head0 {  $_[0]{'scratch'} = '<h1>' }
sub start_head1 {  $_[0]{'scratch'} = '<h2>' }
sub start_head2 {  $_[0]{'scratch'} = '<h3>' }
sub start_head3 {  $_[0]{'scratch'} = '<h4>' }
sub start_head4 {  $_[0]{'scratch'} = '<h5>' }

sub start_item_bullet { $_[0]{'scratch'} = '<li>' }
sub start_item_number { $_[0]{'scratch'} = "<li>$_[1]{'number'}. "  }
sub start_item_text   { $_[0]{'scratch'} = '<li>'   }

sub start_over_bullet { $_[0]{'scratch'} = '<ul>'; $_[0]->emit() }
sub start_over_text   { $_[0]{'scratch'} = '<ul>'; $_[0]->emit() }
sub start_over_block  { $_[0]{'scratch'} = '<ul>'; $_[0]->emit() }
sub start_over_number { $_[0]{'scratch'} = '<ol>'; $_[0]->emit() }

sub end_over_bullet { $_[0]{'scratch'} .= '</ul>'; $_[0]->emit('nowrap') }
sub end_over_text   { $_[0]{'scratch'} .= '</ul>'; $_[0]->emit('nowrap') }
sub end_over_block  { $_[0]{'scratch'} .= '</ul>'; $_[0]->emit('nowrap') }
sub end_over_number { $_[0]{'scratch'} .= '</ol>'; $_[0]->emit('nowrap') }

# . . . . . Now the actual formatters:

sub end_Para     { $_[0]{'scratch'} .= '</p>'; $_[0]->emit() }
sub end_Verbatim {
    $_[0]{'scratch'}     .= '</code></pre>';
    $_[0]{'in_verbatim'}  = 0;
    $_[0]->emit('nowrap');
}

sub end_head0       { $_[0]{'scratch'} .= '</h1>'; $_[0]->emit() }
sub end_head1       { $_[0]{'scratch'} .= '</h2>'; $_[0]->emit() }
sub end_head2       { $_[0]{'scratch'} .= '</h3>'; $_[0]->emit() }
sub end_head3       { $_[0]{'scratch'} .= '</h4>'; $_[0]->emit() }
sub end_head4       { $_[0]{'scratch'} .= '</h5>'; $_[0]->emit() }

sub end_item_bullet { $_[0]{'scratch'} .= '</li>'; $_[0]->emit() }
sub end_item_number { $_[0]{'scratch'} .= '</li>'; $_[0]->emit() }
sub end_item_text   { $_[0]->emit() }

sub start_sidebar { 
  my ($self, $flags) = @_;
  $self->{'scratch'} = $self->{'css_tags'} ? '<div class="sidebar">' : '<blockquote>';
  if ($flags->{'title'}) {
    $self->{'scratch'} .= "\n<h3>" . $flags->{'title'} . "</h3>";
  }
  $self->emit('nowrap');
}

sub end_sidebar { $_[0]{'scratch'} .= $_[0]->{'css_tags'} ?  '</div>' : '</blockquote>'; $_[0]->emit() }

sub start_figure { 
  my ($self, $flags)      = @_;
  $self->{'in_figure'}    = 1;

  $self->{'figure_title'} = $flags->{'title'} if $flags->{'title'};
}

sub end_figure { 
  my ($self, $flags)   = @_;
  $self->{'in_figure'} = 0;

  if ($self->{'figure_title'})
  {
    $self->{'scratch'} .= "<p><em>" . $self->{'figure_title'} . "</em></p>";
    delete $self->{'figure_title'};
  }

  $self->emit('nowrap');
}

# This handles =begin and =for blocks of all kinds.
sub start_for { 
  my ($self, $flags) = @_;
  if ($self->{'css_tags'}) {
    $self->{'scratch'} .= '<div';
    $self->{'scratch'} .= ' class="'.$flags->{'target'}.'"' if ($flags->{'target'});
    $self->{'scratch'} .= '>';
    $self->emit('nowrap');
  }

}
sub end_for { 
  my ($self) = @_;
  if ($self->{'css_tags'}) {
    $self->{'scratch'} .= '</div>';
    $self->emit('nowrap');
  }
}

sub start_table { 
  my ($self, $flags) = @_;
  if ($flags->{'title'}) {
    $self->{'scratch'} .= "<i>Table: " . $flags->{'title'} . "</i>\n";
  }
  $self->{'scratch'} .= '<table>';
  $self->emit('nowrap');
}

sub end_table   { $_[0]{'scratch'} .= '</table>'; $_[0]->emit('nowrap') }

sub start_headrow { $_[0]{'in_headrow'} = 1 }
sub start_bodyrows { $_[0]{'in_headrow'} = 0 }

sub start_row { $_[0]{'scratch'} .= "<tr>\n\n" }
sub end_row { $_[0]{'scratch'} .= '</tr>'; $_[0]->emit() }

sub start_cell { $_[0]{'scratch'} .= $_[0]{'in_headrow'} ? '<th>' : '<td>'; }
sub end_cell { 
  my $self = shift;
  $self->{'scratch'} .= ($self->{'in_headrow'}) ? '</th>' : '</td>';
  $self->emit('nowrap');
}

sub start_Document { 
  my ($self) = @_;
  if ($self->{'body_tags'}) {
    $self->{'scratch'} .= "<html>\n<body>";
    $self->{'scratch'} .= "\n<link rel='stylesheet' href='style.css' type='text/css'>" if $self->{'css_tags'}; 
    $self->emit('nowrap');
  }
}
sub end_Document   { 
  my ($self) = @_;
  if ($self->{'body_tags'}) {
    $self->{'scratch'} .= "</body>\n</html>";
    $self->emit('nowrap');
  }
}

# Handling code tags
sub start_A { $_[0]{'scratch'} .= '<a href="#' }
sub end_A   { $_[0]{'scratch'} .= '">link</a>' }

sub start_B { $_[0]{'scratch'} .= '<b>' }
sub end_B   { $_[0]{'scratch'} .= '</b>' }

sub start_C { $_[0]{'scratch'} .= '<code>' }
sub end_C   { $_[0]{'scratch'} .= '</code>' }

sub start_E { $_[0]{'scratch'} .= '&' }
sub end_E   { $_[0]{'scratch'} .= ';' }

sub start_F { $_[0]{'scratch'} .= ($_[0]{'in_figure'}) ? '<img src="' : '<i>' }
sub end_F   { $_[0]{'scratch'} .= ($_[0]{'in_figure'}) ? '">' : '</i>' }

sub start_G { $_[0]{'scratch'} .= '<sup>' }
sub end_G   { $_[0]{'scratch'} .= '</sup>' }

sub start_H { $_[0]{'scratch'} .= '<sub>' }
sub end_H   { $_[0]{'scratch'} .= '</sub>' }

sub start_I { $_[0]{'scratch'} .= '<i>' }
sub end_I   { $_[0]{'scratch'} .= '</i>' }

sub start_N {
  my ($self) = @_;
  $self->{'scratch'} .= '<font class="footnote">' if ($self->{'css_tags'});
  $self->{'scratch'} .= ' (footnote: '; 
}
sub end_N {
  my ($self) = @_;
  $self->{'scratch'} .= ')'; 
  $self->{'scratch'} .= '</font>' if $self->{'css_tags'};
}

sub start_R { $_[0]{'scratch'} .= '<em>' }
sub end_R   { $_[0]{'scratch'} .= '</em>' }

sub start_U { $_[0]{'scratch'} .= '<font class="url">' if $_[0]{'css_tags'} }
sub end_U   { $_[0]{'scratch'} .= '</font>' if $_[0]{'css_tags'} }

sub start_Z { $_[0]{'scratch'} .= '<a name="' }
sub end_Z   { $_[0]{'scratch'} .= '">' }

sub emit {
  my($self, $nowrap) = @_;
  my $out = $self->{'scratch'} . "\n";
  $out = Text::Wrap::wrap('', '', $out) unless $nowrap;
  print {$self->{'output_fh'}} $out, "\n";
  $self->{'scratch'} = '';
  return;
}

# Set additional options

sub add_body_tags { $_[0]{'body_tags'} = $_[1] }
sub add_css_tags { $_[0]{'css_tags'} = $_[1] }

# bypass built-in E<> handling to preserve entity encoding
sub _treat_Es {} 

1;

__END__

=head1 NAME

Pod::PseudoPod::HTML -- format PseudoPod as HTML

=head1 SYNOPSIS

  use Pod::PseudoPod::HTML;

  my $parser = Pod::PseudoPod::HTML->new();

  ...

  $parser->parse_file('path/to/file.pod');

=head1 DESCRIPTION

This class is a formatter that takes PseudoPod and renders it as
wrapped html.

Its wrapping is done by L<Text::Wrap>, so you can change
C<$Text::Wrap::columns> as you like.

This is a subclass of L<Pod::PseudoPod> and inherits all its methods.

=head1 METHODS

=head2 add_body_tags

  $parser->add_body_tags(1);
  $parser->parse_file($file);

Adds beginning and ending "<html>" and "<body>" tags to the formatted
document.

=head2 add_css_tags

  $parser->add_css_tags(1);
  $parser->parse_file($file);

Imports a css stylesheet to the html document and adds additional css
tags to url, footnote, and sidebar elements for a nicer display. If
you don't plan on writing a style.css file (or using the one provided
in "examples/"), you probably don't want this option on.

=head1 SEE ALSO

L<Pod::PseudoPod>, L<Pod::Simple>

=head1 COPYRIGHT

Copyright (c) 2003-2004 Allison Randal.  All rights reserved.

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself. The full text of the license
can be found in the LICENSE file included with this module.

This library 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

Allison Randal <allison@perl.org>

=cut