#!/usr/local/bin/perl

use strict;
use warnings;
use File::Find;
use File::Path;
use Getopt::Long;
use HTML::Stream;
use IO::File;
use Pod::Tree::HTML;

my %Options = ( bgcolor => '#ffffff' );
my %Index;

my $ok = GetOptions( \%Options, "base:s", "css:s", "index:s", "toc!", "hr:i", "bgcolor:s", "text:s" );
$ok or die "Bad command line options\n";

my ( $ModDir, $HTMLDir ) = @ARGV;
$HTMLDir or die "mod2html modDir HTMLDir\n";

$ModDir =~ s( /$ )()x;
$HTMLDir =~ s( /$ )()x;

mkpath($HTMLDir);

my $HTML_inode = ( stat $HTMLDir )[1];

umask 0022;

find(
	{
		wanted   => \&Translate,
		no_chdir => 1
	},
	$ModDir
);

Index() if $Options{index};

sub Translate {
	-d and &Translate_Dir;
	-f and &Translate_POD;
}

sub Translate_Dir {
	my $dir   = $File::Find::name;
	my $inode = ( stat $dir )[1];    # always 0 on Win32

	if ( $inode and $inode == $HTML_inode ) {
		$File::Find::prune = 1;
		return;
	}

	$dir =~ s/^$ModDir/$HTMLDir/o;
	-d $dir or mkdir $dir, 0755 or die "Can't mkdir $dir: $!\n";
	print "$File::Find::name\n";
}

sub Translate_POD {
	m( \.(pm|pod)$ )x or return;
	my $source = $File::Find::name;

	Hidden($source) and return;
	print "$source\n";

	my $dest = $source;
	$dest =~ s/^$ModDir/$HTMLDir/;
	$dest =~ s( \.\w+$ )(.html)x;

	my $depth = Depth($source);

	my $pod = $source;
	$pod =~ s(^$ModDir/)();
	$pod =~ s( \.\w+$ )()x;
	$Index{$pod} = 1;

	my $html = Pod::Tree::HTML->new( $source, $dest );
	$html->set_options( %Options, depth => $depth );
	$html->translate;
}

sub Hidden {
	my $source = shift;
	$source =~ m(\.pm$) or return 0;
	$source =~ s(\.pm$)(.pod);
	-e $source;
}

sub Depth {
	my $path = shift;
	$path =~ s(^$ModDir/)();
	my @path = split m(/), $path;
	@path - 1;
}

sub Index {
	my $index = "$HTMLDir/index.html";
	my $fh    = IO::File->new(">$index");
	defined $fh or die "Can't open $index: $!\n";

	my $stream = HTML::Stream->new($fh);

	my $title   = $Options{index};
	my $bgcolor = $Options{bgcolor};
	my $text    = $Options{text};

	$stream->HTML->HEAD;
	$stream->TITLE->text($title)->_TITLE;
	$stream->_HEAD->BODY( BGCOLOR => $bgcolor, TEXT => $text );
	$stream->H1->t($title)->_H1;

	Emit_Entries($stream);

	$stream->_BODY->_HTML;
}

sub Emit_Entries {
	my $stream = shift;

	$stream->UL;

	for my $entry ( sort keys %Index ) {
		$stream->LI->A( HREF => "$entry.html" )->t($entry)->_A->_LI;
	}

	$stream->_UL;
}

__END__

=head1 NAME

mod2html - translate module PODs to HTML

=head1 SYNOPSIS

C<mod2html> 
[C<--base> I<url>]
[C<--css> I<url>]
[C<--index> I<title>]
[C<-->[C<no>]C<toc>] [C<--hr> I<level>] 
[C<--bgcolor> I<#rrggbb>] [C<--text> I<#rrggbb>]
I<modDir> I<HTMLdir>

=head1 DESCRIPTION

C<mod2html> locates all the PODs under I<modDir>
translates them to HTML,
and writes them to a directory tree under F<HTMLdir>.

The directory tree maps the module namespaces.

It makes the HTML files world-readable.


=head1 OPTIONS

=over 4

=item C<--base> I<url>

Translate C<LE<lt>E<gt>> sequences into HTML
links relative to I<url>.

=item C<--css> I<url>

Specifies a Cascanding Style Sheet for the generated HTML page.


=item C<--index> I<title>

Writes an index of all the HTML files to I<HTMLDir>F</index.html>.
I<title> is used as the title of the index page.


=item C<-->[C<no>]C<toc>

Includes or omits the table of contents.
Default is to include the TOC.

=item C<--hr> I<level>

Controls the profusion of horizontal lines in the output, as follows:

    level   horizontal lines
    0 	    none
    1 	    between TOC and body
    2 	    after each =head1
    3 	    after each =head1 and =head2

Default is level 1.

=item C<--bgcolor> I<#rrggbb>

Set the background color to I<#rrggbb>.
Default is white.

=item C<--text> I<#rrggbb>

Set the text color to I<#rrggbb>.
Default is black.

=back

=head1 REQUIRES

L<C<Pod::Tree::HTML>>

=head1 SEE ALSO

L<C<pod2html>>, L<C<pods2html>>, L<C<Pod::Tree::HTML>>

=head1 AUTHOR

Steven McDougall, <swmcd@world.std.com>

=head1 COPYRIGHT

Copyright (c) 2003 by Steven McDougall.  This program is free software;
you can redistribute it and/or modify it under the same terms as Perl.