NAME
     Tags::Output::LibXML - Printing 'Tags' structure by LibXML library.

SYNOPSIS
     use Tags::Output::LibXML;
     my $tags = Tags::Output::LibXML->new(%parameters);
     $tags->put(['b', 'element']);
     my @open_tags = $tags->open_tags;
     $tags->finalize;
     $tags->flush($reset_flag);
     $tags->reset;

DESCRIPTION
     This class is only for XML structures.

METHODS
    "new(%parameters)"
             Constructor.

            *       "cdata_callback"

                     Subroutine for output processing of cdata.
                     Input argument is reference to array.
                     Default value is undef.
                     Example is similar as 'data_callback'.

            *       "data_callback"

                     Subroutine for output processing of data, cdata and raw data.
                     Input argument is reference to array.
                     Default value is undef.

                     Example:
                     'data_callback' => sub {
                             my $data_ar = shift;
                             foreach my $data (@{$data_ar}) {

                                     # Some process.
                                     $data =~ s/^\s*//ms;
                             }
                     }

            *       "encoding"

                     Encoding for XML header.
                     Default is 'UTF-8'.

            *       "no_simple"

                     TODO not implemented.
                     Reference to array of tags, that can't by simple.
                     Default is [].

            *       "output_handler"

                     Handler for print output strings.
                     Must be a GLOB.
                     Default is undef.

            *       "preserved"

                     TODO not implemented.
                     Default value is reference to blank array.

            *       "set_indent"

                     Set indent flag.
                     Default is 0.

            *       "skip_bad_tags"

                     Skip bad tags.
                     Default value is 0.

            *       "xml_version"

                     XML version for XML header.
                     Default is "1.1".

    "finalize()"
             Finalize Tags output.
             Automaticly puts end of all opened tags.
             Returns undef.

    "flush($reset_flag)"
             Flush tags in object.
             If defined 'output_handler' flush to its.
             Or return code.
             If enabled $reset_flag, then resets internal variables via reset method.

    "open_tags()"
             Return array of opened tags.

    "put(@data)"
             Put tags code in tags format.
             Returns undef.

    "reset()"
             Resets internal variables.
             Returns undef.

ERRORS
     TODO

EXAMPLE1
     # Pragmas.
     use strict;
     use warnings;

     # Modules.
     use Tags::Output::LibXML;

     # Object.
     my $tags = Tags::Output::LibXML->new;

     # Put data.
     $tags->put(
             ['b', 'text'],
             ['d', 'data'],
             ['e', 'text'],
     );

     # Print.
     print $tags->flush."\n";

     # Output:
     # <?xml version="1.1" encoding="UTF-8"?>
     # <text>data</text>

EXAMPLE2
     # Pragmas.
     use strict;
     use warnings;

     # Modules.
     use Encode;
     use Tags::Output::LibXML;

     # Object.
     my $tags = Tags::Output::LibXML->new(
             'data_callback' => sub {
                     my $data_ar = shift;
                     foreach my $data (@{$data_ar}) {
                             $data = encode_utf8($data);
                     }
                     return;
             },
     );

     # Data in characters.
     my $data = decode_utf8('řčěšřšč');

     # Put data.
     $tags->put(
             ['b', 'text'],
             ['d', $data],
             ['e', 'text'],
     );

     # Print.
     print $tags->flush."\n";

     # Output:
     # <?xml version="1.1" encoding="UTF-8"?>
     # <text>řčěšřšč</text>

DEPENDENCIES
    Error::Pure, Readonly, Tags::Output, XML::LibXML.

SEE ALSO
    Tags
        Structure oriented SGML/XML/HTML/etc. elements manipulation.

    Tags::Output
        Base class for Tags::Output::*.

    Task::Tags
        Install the Tags modules.

AUTHOR
    Michal Špaček skim@cpan.org

LICENSE AND COPYRIGHT
     © 2011-2015 Michal Špaček
     BSD 2-Clause License

VERSION
    0.02