package HTML::HTML5::Parser::TagSoupParser;
## skip Test::Tabs
# This is a port of the Whatpm::HTML package away from dependencies
# on manakai, and towards CPAN and XML::LibXML.
# http://suika.fam.cx/gate/git/wi/manakai.git/history/HEAD:/lib/Whatpm/HTML.pm
# CAUGHT UP TO d81fcb920a1a3c351149cd66a64bf1b8ae14a172 (2011-08-21)
use 5.008001;
use strict;
no warnings;
our $VERSION = '0.992';
use IO::Handle;
use HTML::HTML5::Parser::Tokenizer;
use Scalar::Util qw(blessed);
use Try::Tiny;
use XML::LibXML ':libxml';
use XML::LibXML::Devel;
BEGIN
{
        if (eval { require XML::LibXML::Devel::SetLineNumber; 1 })
        {
                *HAS_XLXDSLN = sub () { 1 };
        }
        else
        {
                *HAS_XLXDSLN = sub () { 0 };
        }
}
*XML::LibXML::Element::appendTextFromUnicode = sub
{
        my $element = shift;
        my $parser  = shift if ref $_[0];
        my $text    = shift;  utf8::encode($text);
        my $token   = shift;
         
        # This prevents adjacent text nodes.
        if (defined $element->lastChild
        and $element->lastChild->nodeType == XML_TEXT_NODE)
        {
                $element->appendText($text);
                return;
        }
        my $textnode = XML::LibXML::Text->new($text);
        if ($token)
        {
                $parser->_data($textnode, manakai_source_line => $token->{line})
            if $parser and defined $token->{line};
                $parser->_data($textnode, manakai_source_column => $token->{column})
            if $parser and defined $token->{column};
                if (HAS_XLXDSLN
                and exists $token->{line}
                and int($token->{line})
                and int($token->{line}) eq $token->{line})
                {
                        $textnode->XML::LibXML::Devel::SetLineNumber::set_line_number($token->{line});
                }
        }
        return $element->appendChild($textnode);
};
our $DATA = {};
sub DATA {
    _data(undef, @_);
}
sub _data
{
    my $self = shift;
        my ($object, $k, $v) = @_;
        my $argc = @_;
        # This method doesn't work for non XLxN things. Fail silently.
        unless (blessed($object) and $object->isa('XML::LibXML::Node'))
        {
                return {} if $argc==1;
                return;
        }
        # This seems to work much better as a unique identifier for a
        # node than refaddr does. However, it's not a supported use
        # for XML::LibXML::Devel, so it might cause failures. We'll see.
        my $oaddr = XML::LibXML::Devel::node_from_perl($object);
        my $data;
    if (ref $self) {
        $data = $self->{_debug_cache}{$oaddr} ||= {};
    }
    else {
        $data = $DATA->{$oaddr} ||= {};
    }
        if (HAS_XLXDSLN
        and defined $k
        and $k eq 'manakai_source_line'
        and defined $v
        and int($v)
        and int($v) eq $v
        and $object->nodeType == XML_ELEMENT_NODE) # does not work well for attrs
        {
                $object->XML::LibXML::Devel::SetLineNumber::set_line_number($v);
        }
        $data->{$k} = $v   if $argc==3;
        return $data->{$k} if $argc==2;
        return $data;
}
## NOTE: This module don't check all HTML5 parse errors; character
## encoding related parse errors are expected to be handled by relevant
## modules.
## Parse errors for control characters that are not allowed in HTML5
## documents, for surrogate code points, and for noncharacter code
## points, as well as U+FFFD substitions for characters whose code points
## is higher than U+10FFFF may be detected by combining the parser with
## the checker implemented by HTML::HTML5::Parser::Charset::UnicodeChecker (for its
## usage example, see |t/HTML-tree.t| in the Whatpm package or the 
## WebHACC::Language::HTML module in the WebHACC package).
## ISSUE:
## var doc = implementation.createDocument (null, null, null);
## doc.write ('');
## alert (doc.compatMode);
## Namespace URLs
sub HTML_NS ()  { q <http://www.w3.org/1999/xhtml> }
sub MML_NS ()   { q <http://www.w3.org/1998/Math/MathML> }
sub SVG_NS ()   { q <http://www.w3.org/2000/svg> }
sub XLINK_NS () { q <http://www.w3.org/1999/xlink> }
sub XML_NS ()   { q <http://www.w3.org/XML/1998/namespace> }
sub XMLNS_NS () { q <http://www.w3.org/2000/xmlns/> }
## Element categories
## Bits 14-18
sub BUTTON_SCOPING_EL () { 0b1_000000000000000000 } ## Special
sub SPECIAL_EL () { 0b1_00000000000000000 }         ## Special
sub SCOPING_EL () { 0b1_0000000000000000 }          ## Special
sub FORMATTING_EL () { 0b1_000000000000000 }        ## Formatting
sub PHRASING_EL () { 0b1_00000000000000 }           ## Ordinary
## Bits 10-13
sub SVG_EL () { 0b1_0000000000000 }
sub MML_EL () { 0b1_000000000000 }
#sub FOREIGN_EL () { 0b1_00000000000 } # see HTML::HTML5::Parser::Tokenizer
sub FOREIGN_FLOW_CONTENT_EL () { 0b1_0000000000 }
## Bits 6-9
sub TABLE_SCOPING_EL () { 0b1_000000000 }
sub TABLE_ROWS_SCOPING_EL () { 0b1_00000000 }
sub TABLE_ROW_SCOPING_EL () { 0b1_0000000 }
sub TABLE_ROWS_EL () { 0b1_000000 }
## Bit 5
sub ADDRESS_DIV_P_EL () { 0b1_00000 }
## NOTE: Used in </body> and EOF algorithms.
## Bit 4
sub ALL_END_TAG_OPTIONAL_EL () { 0b1_0000 }
## NOTE: Used in "generate implied end tags" algorithm.
## NOTE: There is a code where a modified version of
## END_TAG_OPTIONAL_EL is used in "generate implied end tags"
## implementation (search for the algorithm name).
## Bit 3
sub END_TAG_OPTIONAL_EL () { 0b1_000 }
## Bits 0-2
sub MISC_SPECIAL_EL () { SPECIAL_EL | 0b000 }
sub FORM_EL () { SPECIAL_EL | 0b001 }
sub FRAMESET_EL () { SPECIAL_EL | 0b010 }
sub HEADING_EL () { SPECIAL_EL | 0b011 }
sub SELECT_EL () { SPECIAL_EL | 0b100 }
sub SCRIPT_EL () { SPECIAL_EL | 0b101 }
sub BUTTON_EL () { SPECIAL_EL | BUTTON_SCOPING_EL | 0b110 }
sub ADDRESS_DIV_EL () { SPECIAL_EL | ADDRESS_DIV_P_EL | 0b001 }
sub BODY_EL () { SPECIAL_EL | ALL_END_TAG_OPTIONAL_EL | 0b001 }
sub DTDD_EL () {
  SPECIAL_EL |
  END_TAG_OPTIONAL_EL |
  ALL_END_TAG_OPTIONAL_EL |
  0b010
}
sub LI_EL () {
  SPECIAL_EL |
  END_TAG_OPTIONAL_EL |
  ALL_END_TAG_OPTIONAL_EL |
  0b100
}
sub P_EL () {
  SPECIAL_EL |
  ADDRESS_DIV_P_EL |
  END_TAG_OPTIONAL_EL |
  ALL_END_TAG_OPTIONAL_EL |
  0b001
}
sub TABLE_ROW_EL () {
  SPECIAL_EL |
  TABLE_ROWS_EL |
  TABLE_ROW_SCOPING_EL |
  ALL_END_TAG_OPTIONAL_EL |
  0b001
}
sub TABLE_ROW_GROUP_EL () {
  SPECIAL_EL |
  TABLE_ROWS_EL |
  TABLE_ROWS_SCOPING_EL |
  ALL_END_TAG_OPTIONAL_EL |
  0b001
}
sub MISC_SCOPING_EL () { SCOPING_EL | BUTTON_SCOPING_EL | 0b000 }
sub CAPTION_EL () { SCOPING_EL | BUTTON_SCOPING_EL | 0b010 }
sub HTML_EL () {
  SCOPING_EL |
  BUTTON_SCOPING_EL |
  TABLE_SCOPING_EL |
  TABLE_ROWS_SCOPING_EL |
  TABLE_ROW_SCOPING_EL |
  ALL_END_TAG_OPTIONAL_EL |
  0b001
}
sub TABLE_EL () {
  SCOPING_EL |
  BUTTON_SCOPING_EL |
  TABLE_ROWS_EL |
  TABLE_SCOPING_EL |
  0b001
}
sub TABLE_CELL_EL () {
  SCOPING_EL |
  BUTTON_SCOPING_EL |
  ALL_END_TAG_OPTIONAL_EL |
  0b001
}
sub MISC_FORMATTING_EL () { FORMATTING_EL | 0b000 }
sub A_EL () { FORMATTING_EL | 0b001 }
sub NOBR_EL () { FORMATTING_EL | 0b010 }
sub RUBY_EL () { PHRASING_EL | 0b001 }
## NOTE: These elements are not included in |ALL_END_TAG_OPTIONAL_EL|.
sub OPTGROUP_EL () { PHRASING_EL | END_TAG_OPTIONAL_EL | 0b001 }
sub OPTION_EL () { PHRASING_EL | END_TAG_OPTIONAL_EL | 0b010 }
sub RUBY_COMPONENT_EL () { PHRASING_EL | END_TAG_OPTIONAL_EL | 0b100 }
## "MathML text integration point" elements.
sub MML_TEXT_INTEGRATION_EL () {
  MML_EL |
  SCOPING_EL |
  BUTTON_SCOPING_EL |
  FOREIGN_EL |
  FOREIGN_FLOW_CONTENT_EL
} # MML_TEXT_INTEGRATION_EL
sub MML_AXML_EL () {
  MML_EL |
  SCOPING_EL |
  BUTTON_SCOPING_EL |
  FOREIGN_EL |
  0b001
} # MML_AXML_EL
## "HTML integration point" elements in SVG namespace.
sub SVG_INTEGRATION_EL () {
  SVG_EL |
  SCOPING_EL |
  BUTTON_SCOPING_EL |
  FOREIGN_EL |
  FOREIGN_FLOW_CONTENT_EL
} # SVG_INTEGRATION_EL
sub SVG_SCRIPT_EL () {
  SVG_EL |
  FOREIGN_EL |
  0b101
} # SVG_SCRIPT_EL
my $el_category = {
  a => A_EL,
  address => ADDRESS_DIV_EL,
  applet => MISC_SCOPING_EL,
  area => MISC_SPECIAL_EL,
  article => MISC_SPECIAL_EL,
  aside => MISC_SPECIAL_EL,
  b => FORMATTING_EL,
  base => MISC_SPECIAL_EL,
  basefont => MISC_SPECIAL_EL,
  bgsound => MISC_SPECIAL_EL,
  big => FORMATTING_EL,
  blockquote => MISC_SPECIAL_EL,
  body => BODY_EL,
  br => MISC_SPECIAL_EL,
  button => BUTTON_EL,
  caption => CAPTION_EL,
  center => MISC_SPECIAL_EL,
  code => FORMATTING_EL,
  col => MISC_SPECIAL_EL,
  colgroup => MISC_SPECIAL_EL,
  command => MISC_SPECIAL_EL,
  #datagrid => MISC_SPECIAL_EL,
  dd => DTDD_EL,
  details => MISC_SPECIAL_EL,
  dir => MISC_SPECIAL_EL,
  div => ADDRESS_DIV_EL,
  dl => MISC_SPECIAL_EL,
  dt => DTDD_EL,
  em => FORMATTING_EL,
  embed => MISC_SPECIAL_EL,
  fieldset => MISC_SPECIAL_EL,
  figure => MISC_SPECIAL_EL,
  figcaption => MISC_SPECIAL_EL,
  font => FORMATTING_EL,
  footer => MISC_SPECIAL_EL,
  form => FORM_EL,
  frame => MISC_SPECIAL_EL,
  frameset => FRAMESET_EL,
  h1 => HEADING_EL,
  h2 => HEADING_EL,
  h3 => HEADING_EL,
  h4 => HEADING_EL,
  h5 => HEADING_EL,
  h6 => HEADING_EL,
  head => MISC_SPECIAL_EL,
  header => MISC_SPECIAL_EL,
  hgroup => MISC_SPECIAL_EL,
  hr => MISC_SPECIAL_EL,
  html => HTML_EL,
  i => FORMATTING_EL,
  iframe => MISC_SPECIAL_EL,
  img => MISC_SPECIAL_EL,
  #image => MISC_SPECIAL_EL, ## NOTE: Commented out in the spec.
  input => MISC_SPECIAL_EL,
  isindex => MISC_SPECIAL_EL,
  ## XXX keygen? (Whether a void element is in Special or not does not
  ## affect to the processing, however.)
  li => LI_EL,
  link => MISC_SPECIAL_EL,
  listing => MISC_SPECIAL_EL,
  marquee => MISC_SCOPING_EL,
  menu => MISC_SPECIAL_EL,
  meta => MISC_SPECIAL_EL,
  nav => MISC_SPECIAL_EL,
  nobr => NOBR_EL,
  noembed => MISC_SPECIAL_EL,
  noframes => MISC_SPECIAL_EL,
  noscript => MISC_SPECIAL_EL,
  object => MISC_SCOPING_EL,
  ol => MISC_SPECIAL_EL,
  optgroup => OPTGROUP_EL,
  option => OPTION_EL,
  p => P_EL,
  param => MISC_SPECIAL_EL,
  plaintext => MISC_SPECIAL_EL,
  pre => MISC_SPECIAL_EL,
  rp => RUBY_COMPONENT_EL,
  rt => RUBY_COMPONENT_EL,
  ruby => RUBY_EL,
  s => FORMATTING_EL,
  script => MISC_SPECIAL_EL,
  select => SELECT_EL,
  section => MISC_SPECIAL_EL,
  small => FORMATTING_EL,
  strike => FORMATTING_EL,
  strong => FORMATTING_EL,
  style => MISC_SPECIAL_EL,
  summary => MISC_SPECIAL_EL,
  table => TABLE_EL,
  tbody => TABLE_ROW_GROUP_EL,
  td => TABLE_CELL_EL,
  textarea => MISC_SPECIAL_EL,
  tfoot => TABLE_ROW_GROUP_EL,
  th => TABLE_CELL_EL,
  thead => TABLE_ROW_GROUP_EL,
  title => MISC_SPECIAL_EL,
  tr => TABLE_ROW_EL,
  tt => FORMATTING_EL,
  u => FORMATTING_EL,
  ul => MISC_SPECIAL_EL,
  wbr => MISC_SPECIAL_EL,
  xmp => MISC_SPECIAL_EL,
};
my $el_category_f = {
  (MML_NS) => {
    'annotation-xml' => MML_AXML_EL,
    mi => MML_TEXT_INTEGRATION_EL,
    mo => MML_TEXT_INTEGRATION_EL,
    mn => MML_TEXT_INTEGRATION_EL,
    ms => MML_TEXT_INTEGRATION_EL,
    mtext => MML_TEXT_INTEGRATION_EL,
  },
  (SVG_NS) => {
    foreignObject => SVG_INTEGRATION_EL,
    desc => SVG_INTEGRATION_EL,
    title => SVG_INTEGRATION_EL,
    script => SVG_SCRIPT_EL,
  },
  ## NOTE: In addition, FOREIGN_EL is set to non-HTML elements, MML_EL
  ## is set to MathML elements, and SVG_EL is set to SVG elements.
};
my $svg_attr_name = {
  attributename => 'attributeName',
  attributetype => 'attributeType',
  basefrequency => 'baseFrequency',
  baseprofile => 'baseProfile',
  calcmode => 'calcMode',
  clippathunits => 'clipPathUnits',
  contentscripttype => 'contentScriptType',
  contentstyletype => 'contentStyleType',
  diffuseconstant => 'diffuseConstant',
  edgemode => 'edgeMode',
  externalresourcesrequired => 'externalResourcesRequired',
  filterres => 'filterRes',
  filterunits => 'filterUnits',
  glyphref => 'glyphRef',
  gradienttransform => 'gradientTransform',
  gradientunits => 'gradientUnits',
  kernelmatrix => 'kernelMatrix',
  kernelunitlength => 'kernelUnitLength',
  keypoints => 'keyPoints',
  keysplines => 'keySplines',
  keytimes => 'keyTimes',
  lengthadjust => 'lengthAdjust',
  limitingconeangle => 'limitingConeAngle',
  markerheight => 'markerHeight',
  markerunits => 'markerUnits',
  markerwidth => 'markerWidth',
  maskcontentunits => 'maskContentUnits',
  maskunits => 'maskUnits',
  numoctaves => 'numOctaves',
  pathlength => 'pathLength',
  patterncontentunits => 'patternContentUnits',
  patterntransform => 'patternTransform',
  patternunits => 'patternUnits',
  pointsatx => 'pointsAtX',
  pointsaty => 'pointsAtY',
  pointsatz => 'pointsAtZ',
  preservealpha => 'preserveAlpha',
  preserveaspectratio => 'preserveAspectRatio',
  primitiveunits => 'primitiveUnits',
  refx => 'refX',
  refy => 'refY',
  repeatcount => 'repeatCount',
  repeatdur => 'repeatDur',
  requiredextensions => 'requiredExtensions',
  requiredfeatures => 'requiredFeatures',
  specularconstant => 'specularConstant',
  specularexponent => 'specularExponent',
  spreadmethod => 'spreadMethod',
  startoffset => 'startOffset',
  stddeviation => 'stdDeviation',
  stitchtiles => 'stitchTiles',
  surfacescale => 'surfaceScale',
  systemlanguage => 'systemLanguage',
  tablevalues => 'tableValues',
  targetx => 'targetX',
  targety => 'targetY',
  textlength => 'textLength',
  viewbox => 'viewBox',
  viewtarget => 'viewTarget',
  xchannelselector => 'xChannelSelector',
  ychannelselector => 'yChannelSelector',
  zoomandpan => 'zoomAndPan',
};
my $foreign_attr_xname = {
  'xlink:actuate' => [(XLINK_NS), ['xlink', 'actuate']],
  'xlink:arcrole' => [(XLINK_NS), ['xlink', 'arcrole']],
  'xlink:href' => [(XLINK_NS), ['xlink', 'href']],
  'xlink:role' => [(XLINK_NS), ['xlink', 'role']],
  'xlink:show' => [(XLINK_NS), ['xlink', 'show']],
  'xlink:title' => [(XLINK_NS), ['xlink', 'title']],
  'xlink:type' => [(XLINK_NS), ['xlink', 'type']],
  'xml:base' => [(XML_NS), ['xml', 'base']],
  'xml:lang' => [(XML_NS), ['xml', 'lang']],
  'xml:space' => [(XML_NS), ['xml', 'space']],
  'xmlns' => [(XMLNS_NS), [undef, 'xmlns']],
  'xmlns:xlink' => [(XMLNS_NS), ['xmlns', 'xlink']],
};
## TODO: Invoke the reset algorithm when a resettable element is
## created (cf. HTML5 revision 2259).
sub parse_byte_string ($$$$;$) {
  my $self = shift;
  my $charset_name = shift;
  open my $input, '<', ref $_[0] ? $_[0] : \($_[0]);
  return $self->parse_byte_stream ($charset_name, $input, @_[1..$#_]);
} # parse_byte_string
sub parse_byte_stream ($$$$;$$) {
  # my ($self, $charset_name, $byte_stream, $doc, $onerror, $get_wrapper) = @_;
  my $self = ref $_[0] ? shift : shift->new;
  my $charset_name = shift;
  my $byte_stream = $_[0];
  my $onerror = $_[2] || sub {
    my (%opt) = @_;
    warn "Parse error ($opt{type})\n";
  };
  $self->{parse_error} = $onerror; # updated later by parse_char_string
  my $get_wrapper = $_[3] || sub ($) {
    return $_[0]; # $_[0] = byte stream handle, returned = arg to char handle
  };
  ## HTML5 encoding sniffing algorithm
  require HTML::HTML5::Parser::Charset::Info;
  my $charset;
  my $buffer;
  my ($char_stream, $e_status);
  SNIFFING: {
    ## NOTE: By setting |allow_fallback| option true when the
    ## |get_decode_handle| method is invoked, we ignore what the HTML5
    ## spec requires, i.e. unsupported encoding should be ignored.
      ## TODO: We should not do this unless the parser is invoked
      ## in the conformance checking mode, in which this behavior
      ## would be useful.
    ## Step 1
    if (defined $charset_name) {
      $charset = HTML::HTML5::Parser::Charset::Info->get_by_html_name ($charset_name);
          ## TODO: Is this ok?  Transfer protocol's parameter should be
          ## interpreted in its semantics?
      ($char_stream, $e_status) = $charset->get_decode_handle
          ($byte_stream, allow_error_reporting => 1,
           allow_fallback => 1);
      if ($char_stream) {
        $self->{confident} = 1;
        last SNIFFING;
      } else {
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'charset:not supported',
                        layer => 'encode',
                        line => 1, column => 1,
                        value => $charset_name,
                        level => $self->{level}->{uncertain});
      }
    }
    ## Step 2
    my $byte_buffer = '';
    for (1..1024) {
      my $char = $byte_stream->getc;
      last unless defined $char;
      $byte_buffer .= $char;
    } ## TODO: timeout
    ## Step 3
    if ($byte_buffer =~ /^\xFE\xFF/) {
      $charset = HTML::HTML5::Parser::Charset::Info->get_by_html_name ('utf-16be');
      ($char_stream, $e_status) = $charset->get_decode_handle
          ($byte_stream, allow_error_reporting => 1,
           allow_fallback => 1, byte_buffer => \$byte_buffer);
      $self->{confident} = 1;
      last SNIFFING;
    } elsif ($byte_buffer =~ /^\xFF\xFE/) {
      $charset = HTML::HTML5::Parser::Charset::Info->get_by_html_name ('utf-16le');
      ($char_stream, $e_status) = $charset->get_decode_handle
          ($byte_stream, allow_error_reporting => 1,
           allow_fallback => 1, byte_buffer => \$byte_buffer);
      $self->{confident} = 1;
      last SNIFFING;
    } elsif ($byte_buffer =~ /^\xEF\xBB\xBF/) {
      $charset = HTML::HTML5::Parser::Charset::Info->get_by_html_name ('utf-8');
      ($char_stream, $e_status) = $charset->get_decode_handle
          ($byte_stream, allow_error_reporting => 1,
           allow_fallback => 1, byte_buffer => \$byte_buffer);
      $self->{confident} = 1;
      last SNIFFING;
    }
    ## Step 4
    ## TODO: <meta charset>
    ## Step 5
    ## TODO: from history
    ## Step 6
    require HTML::HTML5::Parser::Charset::UniversalCharDet;
    $charset_name = HTML::HTML5::Parser::Charset::UniversalCharDet->detect_byte_string($byte_buffer)
                if $byte_buffer;
    if (defined $charset_name) {
      $charset = HTML::HTML5::Parser::Charset::Info->get_by_html_name ($charset_name);
      require HTML::HTML5::Parser::Charset::DecodeHandle;
      $buffer = HTML::HTML5::Parser::Charset::DecodeHandle::ByteBuffer->new
          ($byte_stream);
      ($char_stream, $e_status) = $charset->get_decode_handle
          ($buffer, allow_error_reporting => 1,
           allow_fallback => 1, byte_buffer => \$byte_buffer);
      if ($char_stream) {
        $buffer->{buffer} = $byte_buffer;
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'sniffing:chardet',
                        text => $charset_name,
                        level => $self->{level}->{info},
                        layer => 'encode',
                        line => 1, column => 1);
        $self->{confident} = 0;
        last SNIFFING;
      }
    }
    ## Step 7: default
    ## TODO: Make this configurable.
    $charset = HTML::HTML5::Parser::Charset::Info->get_by_html_name ('windows-1252');
        ## NOTE: We choose |windows-1252| here, since |utf-8| should be 
        ## detectable in the step 6.
    require HTML::HTML5::Parser::Charset::DecodeHandle;
    $buffer = HTML::HTML5::Parser::Charset::DecodeHandle::ByteBuffer->new
        ($byte_stream);
    ($char_stream, $e_status)
        = $charset->get_decode_handle ($buffer,
                                       allow_error_reporting => 1,
                                       allow_fallback => 1,
                                       byte_buffer => \$byte_buffer);
    $buffer->{buffer} = $byte_buffer;
    $self->{parse_error}->(level => $self->{level}->{must}, type => 'sniffing:default',
                    text => 'windows-1252',
                    level => $self->{level}->{info},
                    line => 1, column => 1,
                    layer => 'encode');
    $self->{confident} = 0;
  } # SNIFFING
  if ($e_status & HTML::HTML5::Parser::Charset::Info::FALLBACK_ENCODING_IMPL ()) {
    $self->{input_encoding} = $charset->get_iana_name; ## TODO: Should we set actual charset decoder's encoding name?
    $self->{parse_error}->(level => $self->{level}->{must}, type => 'chardecode:fallback',
                    #text => $self->{input_encoding},
                    level => $self->{level}->{uncertain},
                    line => 1, column => 1,
                    layer => 'encode');
  } elsif (not ($e_status &
                HTML::HTML5::Parser::Charset::Info::ERROR_REPORTING_ENCODING_IMPL ())) {
    $self->{input_encoding} = $charset->get_iana_name;
    $self->{parse_error}->(level => $self->{level}->{must}, type => 'chardecode:no error',
                    text => $self->{input_encoding},
                    level => $self->{level}->{uncertain},
                    line => 1, column => 1,
                    layer => 'encode');
  } else {
    $self->{input_encoding} = $charset->get_iana_name;
  }
  $self->{change_encoding} = sub {
    my $self = shift;
    $charset_name = shift;
    my $token = shift;
    my $orig_char_stream = $char_stream;
    $charset = HTML::HTML5::Parser::Charset::Info->get_by_html_name ($charset_name);
    ($char_stream, $e_status) = $charset->get_decode_handle
        ($byte_stream, allow_error_reporting => 1, allow_fallback => 1,
         byte_buffer => \ $buffer->{buffer});
     
    if ($char_stream) { # if supported
      if ($charset->{category} & HTML::HTML5::Parser::Charset::Info::CHARSET_CATEGORY_ASCII_COMPAT () or
          $charset->{category} & HTML::HTML5::Parser::Charset::Info::CHARSET_CATEGORY_UTF16 ()) {
        #
      } else {
        return;
      }
       
      ## "Change the encoding" algorithm:
       
      ## Step 1
      if (defined $self->{input_encoding} and
          $self->{input_encoding} eq $charset_name) {
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'charset label:matching',
                        text => $charset_name,
                        level => $self->{level}->{info});
        $self->{confident} = 1;
        return;
      }
      ## Step 2 (HTML5 revision 3205)
      if (defined $self->{input_encoding} and
          HTML::HTML5::Parser::Charset::Info->get_by_html_name ($self->{input_encoding})
          ->{category} & HTML::HTML5::Parser::Charset::Info::CHARSET_CATEGORY_UTF16 ()) {
        $self->{confident} = 1;
        return;
      }
      ## Step 3
      if ($charset->{category} &
          HTML::HTML5::Parser::Charset::Info::CHARSET_CATEGORY_UTF16 ()) {
        $charset = HTML::HTML5::Parser::Charset::Info->get_by_html_name ('utf-8');
        ($char_stream, $e_status) = $charset->get_decode_handle
            ($byte_stream,
             allow_error_reporting => 1,
             byte_buffer => \ $buffer->{buffer});
      }
      $charset_name = $charset->get_iana_name;
      $self->{parse_error}->(level => $self->{level}->{must}, type => 'charset label detected',
                      text => $self->{input_encoding},
                      value => $charset_name,
                      level => $self->{level}->{warn},
                      token => $token);
       
      ## Step 4
      # if (can) {
        ## change the encoding on the fly.
        #$self->{confident} = 1;
        #return;
      # }
       
      ## Step 5
      HTML::HTML5::Parser::TagSoupParser::RestartParser->throw;
    } else {
      $char_stream = $orig_char_stream;
    }
  }; # $self->{change_encoding}
  # XXX IF YOU PUT $SELF IN HERE YOU GET HUGE FAT MEMORY LEAKS
  my %x = (
      level => $self->{level}{must},
      layer => 'encode',
      line  => $self->{line},
      column => $self->{column} + 1,
      error  => $self->{parse_error},
  );
  my $char_onerror = sub {
    my (undef, $type, %opt) = @_;
    $x{error}->(
        level => $x{level}, layer => $x{layer},
        line  => $x{line}, column => $x{column},
        %opt, type => $type);
    if ($opt{octets}) {
      ${$opt{octets}} = "\x{FFFD}"; # relacement character
    }
  };
  my $wrapped_char_stream = $get_wrapper->($char_stream);
  $wrapped_char_stream->onerror ($char_onerror);
  my @args = ($_[1], $_[2]); # $doc, $onerror - $get_wrapper = undef;
  my $return;
  try {
    $return = $self->parse_char_stream ($wrapped_char_stream, @args);  
  }
  ## NOTE: Invoked after {change_encoding}.
  catch {
    unless (blessed($_)
    and     $_->isa('HTML::HTML5::Parser::TagSoupParser::RestartParser'))
    {
      die $_;
    }
     
    if ($e_status & HTML::HTML5::Parser::Charset::Info::FALLBACK_ENCODING_IMPL ()) {
      $self->{input_encoding} = $charset->get_iana_name; ## TODO: Should we set actual charset decoder's encoding name?
      $self->{parse_error}->(level => $self->{level}->{must}, type => 'chardecode:fallback',
                      level => $self->{level}->{uncertain},
                      #text => $self->{input_encoding},
                      line => 1, column => 1,
                      layer => 'encode');
    } elsif (not ($e_status &
                  HTML::HTML5::Parser::Charset::Info::ERROR_REPORTING_ENCODING_IMPL ())) {
      $self->{input_encoding} = $charset->get_iana_name;
      $self->{parse_error}->(level => $self->{level}->{must}, type => 'chardecode:no error',
                      text => $self->{input_encoding},
                      level => $self->{level}->{uncertain},
                      line => 1, column => 1,
                      layer => 'encode');
    } else {
      $self->{input_encoding} = $charset->get_iana_name;
    }
    $self->{confident} = 1;
    $wrapped_char_stream = $get_wrapper->($char_stream);
    $wrapped_char_stream->onerror ($char_onerror);
    $return = $self->parse_char_stream ($wrapped_char_stream, @args);
  };
  $self->_data($return, charset => $charset_name);
  return $return;
} # parse_byte_stream
## NOTE: HTML5 spec says that the encoding layer MUST NOT strip BOM
## and the HTML layer MUST ignore it.  However, we does strip BOM in
## the encoding layer and the HTML layer does not ignore any U+FEFF,
## because the core part of our HTML parser expects a string of character,
## not a string of bytes or code units or anything which might contain a BOM.
## Therefore, any parser interface that accepts a string of bytes,
## such as |parse_byte_string| in this module, must ensure that it does
## strip the BOM and never strip any ZWNBSP.
sub parse_char_string ($$$;$$) {
  #my ($self, $s, $doc, $onerror, $get_wrapper) = @_;
  my $self = shift;
  my $s = ref $_[0] ? $_[0] : \($_[0]);
  require HTML::HTML5::Parser::Charset::DecodeHandle;
  my $input = HTML::HTML5::Parser::Charset::DecodeHandle::CharString->new ($s);
  return $self->parse_char_stream ($input, @_[1..$#_]);
} # parse_char_string
*parse_string = \&parse_char_string; ## NOTE: Alias for backward compatibility.
sub parse_char_stream ($$$;$$) {
  my $self = ref $_[0] ? shift : shift->new;
  my $input = $_[0];
  my $doc = $self->{document} = $_[1];
  $self->{document}->removeChildNodes;
  ## NOTE: |set_inner_html| copies most of this method's code
  ## Confidence: irrelevant.
  $self->{confident} = 1 unless exists $self->{confident};
  $self->{document}->setEncoding($self->{input_encoding})
      if defined $self->{input_encoding};
## TODO: |{input_encoding}| is needless?
  $self->{line_prev} = $self->{line} = 1;
  $self->{column_prev} = -1;
  $self->{column} = 0;
  $self->{set_nc} = sub {
    my $self = shift;
    my $char = '';
    if (defined $self->{next_nc}) {
      $char = $self->{next_nc};
      delete $self->{next_nc};
      $self->{nc} = ord $char;
    } else {
      $self->{char_buffer} = '';
      $self->{char_buffer_pos} = 0;
      my $count = $input->manakai_read_until
         ($self->{char_buffer}, qr/[^\x0A\x0D]/, $self->{char_buffer_pos});
      if ($count) {
        $self->{line_prev} = $self->{line};
        $self->{column_prev} = $self->{column};
        $self->{column}++;
        $self->{nc}
            = ord substr ($self->{char_buffer}, $self->{char_buffer_pos}++, 1);
        return;
      }
      if ($input->read ($char, 1)) {
        $self->{nc} = ord $char;
      } else {
        $self->{nc} = -1;
        return;
      }
    }
    ($self->{line_prev}, $self->{column_prev})
        = ($self->{line}, $self->{column});
    $self->{column}++;
     
    if ($self->{nc} == 0x000A) { # LF
       
      $self->{line}++;
      $self->{column} = 0;
    } elsif ($self->{nc} == 0x000D) { # CR
       
## TODO: support for abort/streaming
      my $next = '';
      if ($input->read ($next, 1) and $next ne "\x0A") {
        $self->{next_nc} = $next;
      }
      $self->{nc} = 0x000A; # LF # MUST
      $self->{line}++;
      $self->{column} = 0;
        }
  };
  $self->{read_until} = sub {
    #my ($scalar, $specials_range, $offset) = @_;
    return 0 if defined $self->{next_nc};
    my $pattern = qr/[^$_[1]\x0A\x0D]/;
    my $offset = $_[2] || 0;
    if ($self->{char_buffer_pos} < length $self->{char_buffer}) {
      pos ($self->{char_buffer}) = $self->{char_buffer_pos};
      if ($self->{char_buffer} =~ /\G(?>$pattern)+/) {
        substr ($_[0], $offset)
            = substr ($self->{char_buffer}, $-[0], $+[0] - $-[0]);
        my $count = $+[0] - $-[0];
        if ($count) {
          $self->{column} += $count;
          $self->{char_buffer_pos} += $count;
          $self->{line_prev} = $self->{line};
          $self->{column_prev} = $self->{column} - 1;
          $self->{nc} = -1;
        }
        return $count;
      } else {
        return 0;
      }
    } else {
      my $count = $input->manakai_read_until ($_[0], $pattern, $_[2]);
      if ($count) {
        $self->{column} += $count;
        $self->{line_prev} = $self->{line};
        $self->{column_prev} = $self->{column} - 1;
        $self->{nc} = -1;
      }
      return $count;
    }
  }; # $self->{read_until}
  my $onerror = $_[2] || sub {
    my (%opt) = @_;
    my $line = $opt{token} ? $opt{token}->{line} : $opt{line};
    my $column = $opt{token} ? $opt{token}->{column} : $opt{column};
    warn "Parse error ($opt{type}) at line $line column $column\n";
  };
  $self->{parse_error} = sub {
    $onerror->(line => $self->{line}, column => $self->{column}, @_);
  };
  my $char_onerror = sub {
    my (undef, $type, %opt) = @_;
    $self->{parse_error}->(level => $self->{level}->{must}, layer => 'encode',
                    line => $self->{line}, column => $self->{column} + 1,
                    %opt, type => $type);
  }; # $char_onerror
  if ($_[3]) {
    $input = $_[3]->($input);
    $input->onerror ($char_onerror);
  } else {
    $input->onerror ($char_onerror) unless defined $input->onerror;
  }
  $self->_initialize_tokenizer;
  $self->_initialize_tree_constructor;
  $self->_construct_tree;
  $self->_terminate_tree_constructor;
  ## Remove self-references
  delete $self->{set_nc}; 
  delete $self->{read_until}; 
  delete $self->{parse_error}; 
  delete $self->{document}; 
  return $doc;
} # parse_char_stream
sub new ($;@) {
  my $class = shift;
  my %p = @_;
  my $self = bless {
    level => {
      must => 'm',
      should => 's',
      obsconforming => 's',
      warn => 'w',
      info => 'i',
      uncertain => 'u',
    },
    _debug_cache => $p{no_cache} ? {} : $DATA,
  }, $class;
  $self->{set_nc} = sub {
    $self->{nc} = -1;
  };
  $self->{parse_error} = sub {
    # 
  };
  $self->{change_encoding} = sub {
    # if ($_[0] is a supported encoding) {
    #   run "change the encoding" algorithm;
    #   throw Whatpm::HTML::RestartParser (charset => $new_encoding);
    # }
  };
  $self->{application_cache_selection} = sub {
    #
  };
  return $self;
} # new
## Insertion modes
sub AFTER_HTML_IMS () { 0b100 }
sub HEAD_IMS ()       { 0b1000 }
sub BODY_IMS ()       { 0b10000 }
sub BODY_TABLE_IMS () { 0b100000 }
sub TABLE_IMS ()      { 0b1000000 }
sub ROW_IMS ()        { 0b10000000 }
sub BODY_AFTER_IMS () { 0b100000000 }
sub FRAME_IMS ()      { 0b1000000000 }
sub SELECT_IMS ()     { 0b10000000000 }
sub IN_CDATA_RCDATA_IM () { 0b1000000000000 }
    ## NOTE: "in CDATA/RCDATA" insertion mode is also special; it is
    ## combined with the original insertion mode.  In thie parser,
    ## they are stored together in the bit-or'ed form.
sub IM_MASK () { 0b11111111111 }
## NOTE: "initial" and "before html" insertion modes have no constants.
## NOTE: "after after body" insertion mode.
sub AFTER_HTML_BODY_IM () { AFTER_HTML_IMS | BODY_AFTER_IMS }
## NOTE: "after after frameset" insertion mode.
sub AFTER_HTML_FRAMESET_IM () { AFTER_HTML_IMS | FRAME_IMS }
sub IN_HEAD_IM () { HEAD_IMS | 0b00 }
sub IN_HEAD_NOSCRIPT_IM () { HEAD_IMS | 0b01 }
sub AFTER_HEAD_IM () { HEAD_IMS | 0b10 }
sub BEFORE_HEAD_IM () { HEAD_IMS | 0b11 }
sub IN_BODY_IM () { BODY_IMS }
sub IN_CELL_IM () { BODY_IMS | BODY_TABLE_IMS | 0b01 }
sub IN_CAPTION_IM () { BODY_IMS | BODY_TABLE_IMS | 0b10 }
sub IN_ROW_IM () { TABLE_IMS | ROW_IMS | 0b01 }
sub IN_TABLE_BODY_IM () { TABLE_IMS | ROW_IMS | 0b10 }
sub IN_TABLE_IM () { TABLE_IMS }
sub AFTER_BODY_IM () { BODY_AFTER_IMS }
sub IN_FRAMESET_IM () { FRAME_IMS | 0b01 }
sub AFTER_FRAMESET_IM () { FRAME_IMS | 0b10 }
sub IN_SELECT_IM () { SELECT_IMS | 0b01 }
sub IN_SELECT_IN_TABLE_IM () { SELECT_IMS | 0b10 }
sub IN_COLUMN_GROUP_IM () { 0b10 }
sub _initialize_tree_constructor ($) {
  my $self = shift;
  ## NOTE: $self->{document} MUST be specified before this method is called
  $self->_data($self->{document})->{strict_error_checking} = 0;
  ## TODO: Turn mutation events off # MUST
  ## TODO: Turn loose Document option (manakai extension) on
  $self->_data($self->{document})->{manakai_is_html} = 1; # MUST
  $self->_data($self->{document})->{manakai_source_line} = 1;
  $self->_data($self->{document})->{manakai_source_column} = 1;
  $self->{frameset_ok} = 1;
} # _initialize_tree_constructor
sub _terminate_tree_constructor ($) {
  my $self = shift;
  $self->_data($self->{document}, strict_error_checking => 1);
  ## TODO: Turn mutation events on
} # _terminate_tree_constructor
## ISSUE: Should appendChild (for example) in script executed in tree construction stage fire mutation events?
{ # tree construction stage
  my $token;
sub _construct_tree ($) {
  my ($self) = @_;
  ## When an interactive UA render the $self->{document} available
  ## to the user, or when it begin accepting user input, are
  ## not defined.
   
  $self->{insertion_mode} = 0; # dummy
  $token = $self->_get_next_token;
  undef $self->{form_element};
  undef $self->{head_element};
  $self->{open_elements} = [];
  undef $self->{inner_html_node};
  undef $self->{ignore_newline};
  ## NOTE: The "initial" insertion mode.
  $self->_tree_construction_initial; # MUST
  ## NOTE: The "before html" insertion mode.
  $self->_tree_construction_root_element;
  $self->{insertion_mode} = BEFORE_HEAD_IM;
  ## NOTE: The "before head" insertion mode and so on.
  $self->_tree_construction_main;
} # _construct_tree
sub _tree_construction_initial ($) {
  my $self = shift;
  ## NOTE: "initial" insertion mode
  INITIAL: {
    if ($token->{type} == DOCTYPE_TOKEN) {
      ## NOTE: Conformance checkers MAY, instead of reporting "not
      ## HTML5" error, switch to a conformance checking mode for
      ## another language.  (We don't support such mode switchings; it
      ## is nonsense to do anything different from what browsers do.)
      my $doctype_name = $token->{name};
      $doctype_name = '' unless defined $doctype_name;
      if ($doctype_name ne 'html') {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'not HTML5', token => $token);
      } elsif (defined $token->{pubid}) {
        ## Obsolete permitted DOCTYPEs (case-sensitive)
        my $xsysid = {
          '-//W3C//DTD HTML 4.0//EN' => 'http://www.w3.org/TR/REC-html40/strict.dtd',
          '-//W3C//DTD HTML 4.01//EN' => 'http://www.w3.org/TR/html4/strict.dtd',
          '-//W3C//DTD XHTML 1.0 Strict//EN' => 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd',
          '-//W3C//DTD XHTML 1.1//EN' => 'http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd',
        }->{$token->{pubid}};
        if (defined $xsysid and
            (not defined $token->{sysid} or $token->{sysid} eq $xsysid)) {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'obs DOCTYPE', token => $token,
                          level => $self->{level}->{obsconforming});
        } else {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'not HTML5', token => $token);
        }
      } elsif (defined $token->{sysid}) {
        if ($token->{sysid} eq 'about:legacy-compat') {
           ## <!DOCTYPE HTML SYSTEM "about:legacy-compat">
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'XSLT-compat', token => $token,
                          level => $self->{level}->{should});
        } else {
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'not HTML5', token => $token);
        }
      } else { ## <!DOCTYPE HTML>
         
        #
      }
  
                $self->_data($self->{'document'}, 'DTD_PUBLIC_ID', $token->{pubid});
                $self->_data($self->{'document'}, 'DTD_SYSTEM_ID', $token->{sysid});
                $self->_data($self->{'document'}, 'DTD_ELEMENT',   (defined $token->{name}?$token->{name}:''));
                $self->_data($self->{'document'}, 'DTD_COLUMN',    $token->{column});
                $self->_data($self->{'document'}, 'DTD_LINE',      $token->{line});
    # TOBYINK
                $self->_data($self->{'document'}, isHTML4 => 1)
                        if (($token->{pubid}||'') =~ /html 4/i or ($token->{sysid}||'') =~ /html4/i);
      if ($token->{quirks} or $doctype_name ne 'html') {
         
        $self->_data($self->{document})->{'manakai_compat_mode'} = 'quirks';
      } elsif (defined $token->{pubid}) {
        my $pubid = $token->{pubid};
        $pubid =~ tr/a-z/A-Z/; ## ASCII case-insensitive.
        my $prefix = [
          "+//SILMARIL//DTD HTML PRO V0R11 19970101//",
          "-//ADVASOFT LTD//DTD HTML 3.0 ASWEDIT + EXTENSIONS//",
          "-//AS//DTD HTML 3.0 ASWEDIT + EXTENSIONS//",
          "-//IETF//DTD HTML 2.0 LEVEL 1//",
          "-//IETF//DTD HTML 2.0 LEVEL 2//",
          "-//IETF//DTD HTML 2.0 STRICT LEVEL 1//",
          "-//IETF//DTD HTML 2.0 STRICT LEVEL 2//",
          "-//IETF//DTD HTML 2.0 STRICT//",
          "-//IETF//DTD HTML 2.0//",
          "-//IETF//DTD HTML 2.1E//",
          "-//IETF//DTD HTML 3.0//",
          "-//IETF//DTD HTML 3.2 FINAL//",
          "-//IETF//DTD HTML 3.2//",
          "-//IETF//DTD HTML 3//",
          "-//IETF//DTD HTML LEVEL 0//",
          "-//IETF//DTD HTML LEVEL 1//",
          "-//IETF//DTD HTML LEVEL 2//",
          "-//IETF//DTD HTML LEVEL 3//",
          "-//IETF//DTD HTML STRICT LEVEL 0//",
          "-//IETF//DTD HTML STRICT LEVEL 1//",
          "-//IETF//DTD HTML STRICT LEVEL 2//",
          "-//IETF//DTD HTML STRICT LEVEL 3//",
          "-//IETF//DTD HTML STRICT//",
          "-//IETF//DTD HTML//",
          "-//METRIUS//DTD METRIUS PRESENTATIONAL//",
          "-//MICROSOFT//DTD INTERNET EXPLORER 2.0 HTML STRICT//",
          "-//MICROSOFT//DTD INTERNET EXPLORER 2.0 HTML//",
          "-//MICROSOFT//DTD INTERNET EXPLORER 2.0 TABLES//",
          "-//MICROSOFT//DTD INTERNET EXPLORER 3.0 HTML STRICT//",
          "-//MICROSOFT//DTD INTERNET EXPLORER 3.0 HTML//",
          "-//MICROSOFT//DTD INTERNET EXPLORER 3.0 TABLES//",
          "-//NETSCAPE COMM. CORP.//DTD HTML//",
          "-//NETSCAPE COMM. CORP.//DTD STRICT HTML//",
          "-//O'REILLY AND ASSOCIATES//DTD HTML 2.0//",
          "-//O'REILLY AND ASSOCIATES//DTD HTML EXTENDED 1.0//",
          "-//O'REILLY AND ASSOCIATES//DTD HTML EXTENDED RELAXED 1.0//",
          "-//SOFTQUAD SOFTWARE//DTD HOTMETAL PRO 6.0::19990601::EXTENSIONS TO HTML 4.0//",
          "-//SOFTQUAD//DTD HOTMETAL PRO 4.0::19971010::EXTENSIONS TO HTML 4.0//",
          "-//SPYGLASS//DTD HTML 2.0 EXTENDED//",
          "-//SQ//DTD HTML 2.0 HOTMETAL + EXTENSIONS//",
          "-//SUN MICROSYSTEMS CORP.//DTD HOTJAVA HTML//",
          "-//SUN MICROSYSTEMS CORP.//DTD HOTJAVA STRICT HTML//",
          "-//W3C//DTD HTML 3 1995-03-24//",
          "-//W3C//DTD HTML 3.2 DRAFT//",
          "-//W3C//DTD HTML 3.2 FINAL//",
          "-//W3C//DTD HTML 3.2//",
          "-//W3C//DTD HTML 3.2S DRAFT//",
          "-//W3C//DTD HTML 4.0 FRAMESET//",
          "-//W3C//DTD HTML 4.0 TRANSITIONAL//",
          "-//W3C//DTD HTML EXPERIMETNAL 19960712//",
          "-//W3C//DTD HTML EXPERIMENTAL 970421//",
          "-//W3C//DTD W3 HTML//",
          "-//W3O//DTD W3 HTML 3.0//",
          "-//WEBTECHS//DTD MOZILLA HTML 2.0//",
          "-//WEBTECHS//DTD MOZILLA HTML//",
        ]; # $prefix
        my $match;
        for (@$prefix) {
          if (substr ($prefix, 0, length $_) eq $_) {
            $match = 1;
            last;
          }
        }
        if ($match or
            $pubid eq "-//W3O//DTD W3 HTML STRICT 3.0//EN//" or
            $pubid eq "-/W3C/DTD HTML 4.0 TRANSITIONAL/EN" or
            $pubid eq "HTML") {
           
          $self->_data($self->{document})->{'manakai_compat_mode'} = 'quirks';
        } elsif ($pubid =~ m[^-//W3C//DTD HTML 4.01 FRAMESET//] or
                 $pubid =~ m[^-//W3C//DTD HTML 4.01 TRANSITIONAL//]) {
          if (defined $token->{sysid}) {
             
            $self->_data($self->{document})->{'manakai_compat_mode'} = 'quirks';
          } else {
             
            $self->_data($self->{document})->{'manakai_compat_mode'} = 'limited quirks';
          }
        } elsif ($pubid =~ m[^-//W3C//DTD XHTML 1.0 FRAMESET//] or
                 $pubid =~ m[^-//W3C//DTD XHTML 1.0 TRANSITIONAL//]) {
           
          $self->_data($self->{document})->{'manakai_compat_mode'} ='limited quirks';
        } else {
           
        }
      } else {
         
      }
      if (defined $token->{sysid}) {
        my $sysid = $token->{sysid};
        $sysid =~ tr/A-Z/a-z/; ## ASCII case-insensitive.
        if ($sysid eq "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd") {
          ## NOTE: Ensure that |PUBLIC "(limited quirks)" "(quirks)"|
          ## is signaled as in quirks mode!
          $self->_data($self->{document})->{'manakai_compat_mode'} = 'quirks';
           
        } else {
           
        }
      } else {
         
      }
       
      ## Go to the "before html" insertion mode.
      $token = $self->_get_next_token;
      return;
    } elsif ({
              START_TAG_TOKEN, 1,
              END_TAG_TOKEN, 1,
              END_OF_FILE_TOKEN, 1,
             }->{$token->{type}}) {
       
                unless ($self->_data($self->{'document'}, 'manakai_is_srcdoc'))
                {
                        $self->{parse_error}->(level => $self->{level}->{must}, type => 'no DOCTYPE', token => $token);
                        $self->_data($self->{document})->{'manakai_compat_mode'} = 'quirks';
                }
      ## Go to the "before html" insertion mode.
      ## reprocess
       
      return;
    } elsif ($token->{type} == CHARACTER_TOKEN) {
      if ($token->{data} =~ s/^([\x09\x0A\x0C\x20]+)//) {
        ## Ignore the token
        unless (length $token->{data}) {
           
          ## Stay in the insertion mode.
          $token = $self->_get_next_token;
          redo INITIAL;
        } else {
           
        }
      } else {
         
      }
      $self->{parse_error}->(level => $self->{level}->{must}, type => 'no DOCTYPE', token => $token);
      $self->_data($self->{document})->{'manakai_compat_mode'} = 'quirks';
      ## Go to the "before html" insertion mode.
      ## reprocess
      return;
    } elsif ($token->{type} == COMMENT_TOKEN) {
       
      my $comment = $self->{document}->createComment($token->{data});
                $self->_data($comment, manakai_source_line => $token->{line})
                        if defined $token->{line};
                $self->_data($comment, manakai_source_column => $token->{column})
                        if defined $token->{column};
      $self->{document}->appendChild($comment);
       
      ## Stay in the insertion mode.
      $token = $self->_get_next_token;
      redo INITIAL;
    } else {
      die "$0: $token->{type}: Unknown token type";
    }
  } # INITIAL
  die "$0: _tree_construction_initial: This should be never reached";
} # _tree_construction_initial
sub _tree_construction_root_element ($) {
  my $self = shift;
  ## NOTE: The "before html" insertion mode.
   
  B: {
      if ($token->{type} == DOCTYPE_TOKEN) {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'in html:#DOCTYPE', token => $token);
        ## Ignore the token
        $token = $self->_get_next_token;
        redo B;
      } elsif ($token->{type} == COMMENT_TOKEN) {
         
        my $comment = $self->{document}->createComment($token->{data});
                        $self->_data($comment, manakai_source_line => $token->{line})
                                if defined $token->{line};
                        $self->_data($comment, manakai_source_column => $token->{column})
                                if defined $token->{column};
        $self->{document}->appendChild($comment);
        ## Stay in the insertion mode.
        $token = $self->_get_next_token;
        redo B;
      } elsif ($token->{type} == CHARACTER_TOKEN) {
        if ($token->{data} =~ s/^([\x09\x0A\x0C\x20]+)//) {
          ## Ignore the token.
          unless (length $token->{data}) {
             
            ## Stay in the insertion mode.
            $token = $self->_get_next_token;
            redo B;
          } else {
             
          }
        } else {
           
        }
        $self->{application_cache_selection}->(undef);
        #
      } elsif ($token->{type} == START_TAG_TOKEN) {
        if ($token->{tag_name} eq 'html') {
          my $root_element;
           
      $root_element = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{ $token->{attributes}}) {
          my $attr_t =  $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
                         next unless $attr;
          $attr->setValue ($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $root_element->setAttributeNodeNS($attr);
        }
       
        $self->_data($root_element, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($root_element, manakai_source_column => $token->{column})
            if defined $token->{column};
       
          $self->{document}->setDocumentElement($root_element);
          push @{$self->{open_elements}},
              [$root_element, $el_category->{html}];
          if ($token->{attributes}->{manifest}) {
             
            ## XXX resolve URL and drop fragment
            ## <http://html5.org/tools/web-apps-tracker?from=3479&to=3480>
            ## <http://manakai.g.hatena.ne.jp/task/2/95>
            $self->{application_cache_selection}
                ->($token->{attributes}->{manifest}->{value});
          } else {
             
            $self->{application_cache_selection}->(undef);
          }
           
          $token = $self->_get_next_token;
          return; ## Go to the "before head" insertion mode.
        } else {
           
          #
        }
      } elsif ($token->{type} == END_TAG_TOKEN) {
       if ({
         head => 1, body => 1, html => 1, br => 1,
       }->{$token->{tag_name}}) {
          
         #
       } else {
          
         $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                         text => $token->{tag_name},
                         token => $token);
         ## Ignore the token.
         $token = $self->_get_next_token;
         redo B;
       }
     } elsif ($token->{type} == END_OF_FILE_TOKEN) {
        
       #
     } else {
        die "$0: $token->{type}: Unknown token type";
      }
    my $root_element;
     
      $root_element = $self->{document}->createElementNS((HTML_NS), 'html');
     
        $self->_data($root_element, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($root_element, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($root_element, implied => __LINE__);
       
    $self->{document}->setDocumentElement($root_element);
    push @{$self->{open_elements}}, [$root_element, $el_category->{html}];
    $self->{application_cache_selection}->(undef);
    ## NOTE: Reprocess the token.
     
    return; ## Go to the "before head" insertion mode.
  } # B
  die "$0: _tree_construction_root_element: This should never be reached";
} # _tree_construction_root_element
sub _reset_insertion_mode ($) {
  my $self = shift;
    ## Step 1
    my $last;
     
    ## Step 2
    my $i = -1;
    my $node = $self->{open_elements}->[$i];
     
    ## LOOP: Step 3
    LOOP: {
      if ($self->{open_elements}->[0]->[0] eq $node->[0]) {
        $last = 1;
        if (defined $self->{inner_html_node}) {
           
          $node = $self->{inner_html_node};
        } else {
          die "_reset_insertion_mode: t27";
        }
      }
       
      ## Step 4..13
      my $new_mode;
                if ($node->[1] == TABLE_CELL_EL) {
        if ($last) {
           
          #
        } else {
           
          $new_mode = IN_CELL_IM;
        }
           } elsif ($node->[1] & FOREIGN_EL) {
                        #
      } else {
         
        $new_mode = {
                      select => IN_SELECT_IM,
                      ## NOTE: |option| and |optgroup| do not set
                      ## insertion mode to "in select" by themselves.
                      tr => IN_ROW_IM,
                      tbody => IN_TABLE_BODY_IM,
                      thead => IN_TABLE_BODY_IM,
                      tfoot => IN_TABLE_BODY_IM,
                      caption => IN_CAPTION_IM,
                      colgroup => IN_COLUMN_GROUP_IM,
                      table => IN_TABLE_IM,
                      head => IN_BODY_IM, # not in head!
                      body => IN_BODY_IM,
                      frameset => IN_FRAMESET_IM,
                     }->{$node->[0]->tagName};
      }
      $self->{insertion_mode} = $new_mode and last LOOP if defined $new_mode;
       
      ## Step 14
      if ($node->[1] == HTML_EL) {
        ## NOTE: Commented out in the spec (HTML5 revision 3894).
        #unless (defined $self->{head_element}) {
           
          $self->{insertion_mode} = BEFORE_HEAD_IM;
        #} else {
          ## ISSUE: Can this state be reached?
           
        #  $self->{insertion_mode} = AFTER_HEAD_IM;
        #}
        last LOOP;
      } else {
         
      }
       
      ## Step 15
                if ($last)
                {
                        $self->{insertion_mode} = IN_BODY_IM;
                        last LOOP;
                }
         
      ## Step 16
      $i--;
      $node = $self->{open_elements}->[$i];
       
      ## Step 17
      redo LOOP;
    } # LOOP
  ## END
} # _reset_insertion_mode
  my $parse_rcdata = sub ($$$$) {
    my ($self, $insert, $open_tables, $parse_refs) = @_;
    ## Step 1
    my $start_tag_name = $token->{tag_name};
     
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue ($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
    ## Step 2
    if ($parse_refs) {
      $self->{state} = RCDATA_STATE;
    } else {
      $self->{state} = RAWTEXT_STATE;
    }
    delete $self->{escape}; # MUST
    ## Step 3, 4
    $self->{insertion_mode} |= IN_CDATA_RCDATA_IM;
     
    $token = $self->_get_next_token;
  }; # $parse_rcdata
  my $script_start_tag = sub ($$$) {
    my ($self, $insert, $open_tables) = @_;
     
    ## Step 1
    my $script_el;
     
      $script_el = $self->{document}->createElementNS((HTML_NS), 'script');
     
        for my $attr_name (keys %{ $token->{attributes}}) {
          my $attr_t =  $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $script_el->setAttributeNodeNS($attr);
        }
       
        $self->_data($script_el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($script_el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
    ## Step 2
    ## TODO: mark as "parser-inserted"
    ## Step 3
    ## TODO: Mark as "already executed", if ...
    ## Step 4 (HTML5 revision 2702)
    $insert->($self, $script_el, $open_tables);
    push @{$self->{open_elements}}, [$script_el, $el_category->{script}];
    ## Step 5
    $self->{state} = SCRIPT_DATA_STATE;
    delete $self->{escape}; # MUST
    ## Step 6-7
    $self->{insertion_mode} |= IN_CDATA_RCDATA_IM;
     
    $token = $self->_get_next_token;
  }; # $script_start_tag
        sub push_afe ($$)
        {
                my ($item => $afes) = @_;
                my $item_token = $item->[2];
                my $depth = 0;
                OUTER: for my $i (reverse 0..$#$afes)
                {
                        my $afe = $afes->[$i];
                        if ($afe->[0] eq '#marker')
                        {
                                last OUTER;
                        }
                        else
                        {
                                my $token = $afe->[2];
                                ## Both |$token| and |$item_token| should be start tag tokens.
                                if ($token->{tag_name} eq $item_token->{tag_name})
                                {
                                        if ((keys %{$token->{attributes}}) !=
                                                (keys %{$item_token->{attributes}}))
                                        {
                                                next OUTER;
                                        }
                                        for my $attr_name (keys %{$item_token->{attributes}})
                                        {
                                                next OUTER unless $token->{attributes}->{$attr_name};
                                                next OUTER unless
                                                        $token->{attributes}->{$attr_name}->{value} eq 
                                                        $item_token->{attributes}->{$attr_name}->{value};
                                        }
                                        $depth++;
                                        if ($depth == 3)
                                        {
                                                splice @$afes, $i, 1 => ();
                                                last OUTER;
                                        }
                        }
                        ## We don't have to check namespaces of elements and attributes,
                        ##  nevertheless the spec requires it, because |$afes| could
                        ##  never contain a non-HTML element at the time of writing.  In
                        ##  addition, scripted changes would never change the original
                        ##  start tag token.
                        }
                } # OUTER
                push @$afes, $item;
        } # push_afe
  my $formatting_end_tag = sub {
    my ($self, $active_formatting_elements, $open_tables, $end_tag_token) = @_;
    my $tag_name = $end_tag_token->{tag_name};
    ## NOTE: The adoption agency algorithm (AAA).
      ## Step 1
                my $outer_loop_counter = 0;
                 
                OUTER: {
                        if ($outer_loop_counter >= 8)
                        {
                                $token = $self->_get_next_token;
                 last OUTER;
                        }
      ## Step 3
      $outer_loop_counter++;
       
      ## Step 4
      my $formatting_element;
      my $formatting_element_i_in_active;
      AFE: for (reverse 0..$#$active_formatting_elements) {
        if ($active_formatting_elements->[$_]->[0] eq '#marker') {
           
          last AFE;
        } elsif ($active_formatting_elements->[$_]->[0]->tagName
                     eq $tag_name) {
           
          $formatting_element = $active_formatting_elements->[$_];
          $formatting_element_i_in_active = $_;
          last AFE;
        }
      } # AFE
      unless (defined $formatting_element) {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag', text => $tag_name, token => $end_tag_token);
        ## Ignore the token
        $token = $self->_get_next_token;
        return;
      }
      ## has an element in scope
      my $in_scope = 1;
      my $formatting_element_i_in_open;  
      INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
        my $node = $self->{open_elements}->[$_];
        if ($node->[0] eq $formatting_element->[0]) {
          if ($in_scope) {
             
            $formatting_element_i_in_open = $_;
            last INSCOPE;
          } else { # in open elements but not in scope
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => $token->{tag_name},
                            token => $end_tag_token);
            ## Ignore the token
            $token = $self->_get_next_token;
            return;
          }
        } elsif ($node->[1] & SCOPING_EL) {
           
          $in_scope = 0;
        }
      } # INSCOPE
      unless (defined $formatting_element_i_in_open) {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                        text => $token->{tag_name},
                        token => $end_tag_token);
        pop @$active_formatting_elements; # $formatting_element
        $token = $self->_get_next_token; ## TODO: ok?
        return;
      }
      if (not $self->{open_elements}->[-1]->[0] eq $formatting_element->[0]) {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                        text => $self->{open_elements}->[-1]->[0]
                            ->tagName,
                        token => $end_tag_token);
      }
       
      ## Step 5
      my $furthest_block;
      my $furthest_block_i_in_open;
      OE: for (reverse 0..$#{$self->{open_elements}}) {
        my $node = $self->{open_elements}->[$_];
        if ($node->[1] & SPECIAL_EL or $node->[1] & SCOPING_EL) { ## "Special"          
          $furthest_block = $node;
          $furthest_block_i_in_open = $_;
          ## NOTE: The topmost (eldest) node.
        } elsif ($node->[0] eq $formatting_element->[0]) {
           
          last OE;
        }
      } # OE
       
      ## Step 6
      unless (defined $furthest_block) { # MUST
         
        splice @{$self->{open_elements}}, $formatting_element_i_in_open;
        splice @$active_formatting_elements, $formatting_element_i_in_active, 1;
        $token = $self->_get_next_token;
        return;
      }
       
      ## Step 7
      my $common_ancestor_node = $self->{open_elements}->[$formatting_element_i_in_open - 1];
       
      ## Step 8
      my $bookmark_prev_el
        = $active_formatting_elements->[$formatting_element_i_in_active - 1]
          ->[0];
       
      ## Step 9
      my $node = $furthest_block;
      my $node_i_in_open = $furthest_block_i_in_open;
      my $last_node = $furthest_block;
                 
                ## Step 9.1
                my $inner_loop_counter = 0;
                 
      INNER: {
        ## Step 9.2
        if ($inner_loop_counter >= 3) {
          $token = $self->_get_next_token;
          last OUTER;
        }
        ## Step 9.3
        $inner_loop_counter++;
                   
        ## Step 9.4
        $node_i_in_open--;
        $node = $self->{open_elements}->[$node_i_in_open];
         
        ## Step 9.5
        my $node_i_in_active;
        my $node_token;
        S7S2: {
          for (reverse 0..$#$active_formatting_elements) {
            if ($active_formatting_elements->[$_]->[0] eq $node->[0]) {
               
              $node_i_in_active = $_;
              $node_token = $active_formatting_elements->[$_]->[2];
              last S7S2;
            }
          }
          splice @{$self->{open_elements}}, $node_i_in_open, 1;
          redo INNER;
        } # S7S2
         
        ## Step 9.6
        last INNER if $node->[0] eq $formatting_element->[0];
         
        ## Step 9.7
        if ($node->[0]->hasChildNodes ()) {
           
          my $new_element = [];
           
      $new_element->[0] = $self->{document}->createElementNS((HTML_NS), $node_token->{tag_name});
     
        for my $attr_name (keys %{ $node_token->{attributes}}) {
          my $attr_t =  $node_token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue ($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $new_element->[0]->setAttributeNodeNS($attr);
        }
       
        $self->_data($new_element->[0], manakai_source_line => $node_token->{line})
            if defined $node_token->{line};
        $self->_data($new_element->[0], manakai_source_column => $node_token->{column})
            if defined $node_token->{column};
       
          $new_element->[1] = $node->[1];
          $new_element->[2] = $node_token;
          $active_formatting_elements->[$node_i_in_active] = $new_element;
          $self->{open_elements}->[$node_i_in_open] = $new_element;
          $node = $new_element;
        }
        ## Step 9.8
        if ($last_node->[0] eq $furthest_block->[0]) {
           
          $bookmark_prev_el = $node->[0];
        }        
         
        ## Step 9.9
        $node->[0]->appendChild ($last_node->[0]);
         
        ## Step 9.10
        $last_node = $node;
         
        ## Step 9.11
        redo INNER;
      } # INNER
       
      ## Step 10
      if ($common_ancestor_node->[1] & TABLE_ROWS_EL) {
        ## Foster parenting.
        my $foster_parent_element;
        my $next_sibling;
        OE: for (reverse 0..$#{$self->{open_elements}}) {
          if ($self->{open_elements}->[$_]->[1] == TABLE_EL) {
             
            $foster_parent_element = $self->{open_elements}->[$_ - 1]->[0];
            $next_sibling = $self->{open_elements}->[$_]->[0];
            undef $next_sibling
                unless $next_sibling->parentNode eq $foster_parent_element;
            last OE;
          }
        } # OE
        $foster_parent_element ||= $self->{open_elements}->[0]->[0];
        $foster_parent_element->insertBefore ($last_node->[0], $next_sibling);
        $open_tables->[-1]->[1] = 1; # tainted
      } else {
         
        $common_ancestor_node->[0]->appendChild ($last_node->[0]);
      }
       
      ## Step 11
          my $new_element = [];
           
      $new_element->[0] = $self->{document}->createElementNS((HTML_NS), $formatting_element->[2]->{tag_name});
     
        for my $attr_name (keys %{ $formatting_element->[2]->{attributes}}) {
          my $attr_t =  $formatting_element->[2]->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue ($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $new_element->[0]->setAttributeNodeNS($attr);
        }
       
        $self->_data($new_element->[0], manakai_source_line => $formatting_element->[2]->{line})
            if defined $formatting_element->[2]->{line};
        $self->_data($new_element->[0], manakai_source_column => $formatting_element->[2]->{column})
            if defined $formatting_element->[2]->{column};
       
          $new_element->[1] = $formatting_element->[1];
          $new_element->[2] = $formatting_element->[2];
       
      ## Step 12
      my @cn = $furthest_block->[0]->childNodes;
      $new_element->[0]->appendChild($_) for @cn;
       
      ## Step 13
      $furthest_block->[0]->appendChild ($new_element->[0]);
       
      ## Step 14
      my $i;
      AFE: for (reverse 0..$#$active_formatting_elements) {
        if ($active_formatting_elements->[$_]->[0] eq $formatting_element->[0]) {
           
          splice @$active_formatting_elements, $_, 1;
          $i-- and last AFE if defined $i;
        } elsif ($active_formatting_elements->[$_]->[0] eq $bookmark_prev_el) {
           
          $i = $_;
        }
      } # AFE
      splice @$active_formatting_elements, (defined $i ? $i : 0) + 1, 0, $new_element;
       
      ## Step 15
      undef $i;
      OE: for (reverse 0..$#{$self->{open_elements}}) {
        if ($self->{open_elements}->[$_]->[0] eq $formatting_element->[0]) {
           
          splice @{$self->{open_elements}}, $_, 1;
          $i-- and last OE if defined $i;
        } elsif ($self->{open_elements}->[$_]->[0] eq $furthest_block->[0]) {
           
          $i = $_;
        }
      } # OE
      splice @{$self->{open_elements}}, $i + 1, 0, $new_element;
       
      ## Step 16
      redo OUTER;
    } # OUTER
  }; # $formatting_end_tag
  my $reconstruct_active_formatting_elements = sub ($$$$) { # MUST
    my ($self, $insert, $active_formatting_elements, $open_tables) = @_;
    ## Step 1
    return unless @$active_formatting_elements;
    ## Step 3
    my $i = -1;
    my $entry = $active_formatting_elements->[$i];
    ## Step 2
    return if $entry->[0] eq '#marker';
    for (@{$self->{open_elements}}) {
      if ($entry->[0] eq $_->[0]) {
         
        return;
      }
    }
     
    S4: {
      ## Step 4
      last S4 if $active_formatting_elements->[0]->[0] eq $entry->[0];
      ## Step 5
      $i--;
      $entry = $active_formatting_elements->[$i];
      ## Step 6
      if ($entry->[0] eq '#marker') {
         
        #
      } else {
        my $in_open_elements;
        OE: for (@{$self->{open_elements}}) {
          if ($entry->[0] eq $_->[0]) {
             
            $in_open_elements = 1;
            last OE;
          }
        }
        if ($in_open_elements) {
           
          #
        } else {
          ## NOTE: <!DOCTYPE HTML><p><b><i><u></p> <p>X
           
          redo S4;
        }
      }
      ## Step 7
      $i++;
      $entry = $active_formatting_elements->[$i];
    } # S4
    S7: {
      ## Step 8
      my $clone = [$entry->[0]->cloneNode(0), $entry->[1], $entry->[2]];
     
      ## Step 9
      $insert->($self, $clone->[0], $open_tables);
      push @{$self->{open_elements}}, $clone;
       
      ## Step 10
      $active_formatting_elements->[$i] = $self->{open_elements}->[-1];
      ## Step 11
      unless ($clone->[0] eq $active_formatting_elements->[-1]->[0]) {
         
        ## Step 7'
        $i++;
        $entry = $active_formatting_elements->[$i];
         
        redo S7;
      }
       
    } # S7
  }; # $reconstruct_active_formatting_elements
  my $clear_up_to_marker = sub ($) {
         my $active_formatting_elements = $_[0];
    for (reverse 0..$#$active_formatting_elements) {
      if ($active_formatting_elements->[$_]->[0] eq '#marker') {
         
        splice @$active_formatting_elements, $_;
        return;
      }
    }
     
  }; # $clear_up_to_marker
  my $insert_to_current = sub {
    #my ($self, $child, $open_tables) = @_;
    $_[0]->{open_elements}->[-1]->[0]->appendChild ($_[1]);
 }; # insert_to_current
  ## Foster parenting.  Note that there are three "foster parenting"
  ## code in the parser: for elements (this one), for texts, and for
  ## elements in the AAA code.
  my $insert_to_foster = sub {
    my ($self, $child, $open_tables) = @_;
    if ($self->{open_elements}->[-1]->[1] & TABLE_ROWS_EL) {
      # MUST
      my $foster_parent_element;
      my $next_sibling;
      OE: for (reverse 0..$#{$self->{open_elements}}) {
        if ($self->{open_elements}->[$_]->[1] == TABLE_EL) {
           
          $foster_parent_element = $self->{open_elements}->[$_ - 1]->[0];
          $next_sibling = $self->{open_elements}->[$_]->[0];
          undef $next_sibling
              unless $next_sibling->parentNode eq $foster_parent_element;
          last OE;
        }
      } # OE
      $foster_parent_element ||= $self->{open_elements}->[0]->[0];
                # This conditional bit is by TOBY
                if ($next_sibling)
                {
                        $foster_parent_element->insertBefore ($child, $next_sibling);
                }
                else
                {
                        $foster_parent_element->appendChild($child);
                }
      $open_tables->[-1]->[1] = 1; # tainted
    } else {
       
      $self->{open_elements}->[-1]->[0]->appendChild ($child);
    }
  }; # $insert_to_foster
sub _tree_construction_main ($) {
  my $self = shift;
  ## "List of active formatting elements".  Each item in this array is
  ## an array reference, which contains: [0] - the element node; [1] -
  ## the local name of the element; [2] - the token that is used to
  ## create [0].
  my $active_formatting_elements = [];
  my $insert;
  ## NOTE: $open_tables->[-1]->[0] is the "current table" element node.
  ## NOTE: $open_tables->[-1]->[1] is the "tainted" flag (OBSOLETE; unused).
  ## NOTE: $open_tables->[-1]->[2] is set false when non-Text node inserted.
  my $open_tables = [[$self->{open_elements}->[0]->[0]]];
  $insert = $insert_to_current;
  ## NOTE: Insert a character (MUST): When a character is inserted, if
  ## the last node that was inserted by the parser is a Text node and
  ## the character has to be inserted after that node, then the
  ## character is appended to the Text node.  However, if any other
  ## node is inserted by the parser, then a new Text node is created
  ## and the character is appended as that Text node.  If I'm not
  ## wrong, for a parser with scripting disabled, there are only two
  ## cases where this occurs.  It is the case where an element or
  ## comment is inserted into the |table| subtree while foster
  ## parenting happens.  This is covered by using the [2] flag of the
  ## |$open_tables| structure.  All other cases are handled simply by
  ## calling |manakai_append_text| method.
   
  B: while (1) {
    if ($token->{n}++ == 100) {
      $self->{parse_error}->(level => $self->{level}->{must}, type => 'parser impl error', # XXXtest
                      token => $token);
      require Data::Dumper;
      warn "====== HTML Parser Error ======\n";
      warn join (' ', map { $_->[0]->tagName } @{$self->{open_elements}}) . ' #' . $self->{insertion_mode} . "\n";
      warn Data::Dumper::Dumper ($token);
      $token = $self->_get_next_token;
      next B;
        }
    ## <http://c.whatwg.org/#tree-construction>
    if (
      (not @{$self->{open_elements}}) or
      (not $self->{open_elements}->[-1]->[1] & FOREIGN_EL) or ## HTML element
      ($self->{open_elements}->[-1]->[1] == MML_TEXT_INTEGRATION_EL and
       (($token->{type} == START_TAG_TOKEN and
         $token->{tag_name} ne 'mglyph' and
         $token->{tag_name} ne 'malignmark') or
        $token->{type} == CHARACTER_TOKEN)) or
      ($self->{open_elements}->[-1]->[1] & MML_AXML_EL and
       $token->{type} == START_TAG_TOKEN and
       $token->{tag_name} eq 'svg') or
      ( ## If the current node is an HTML integration point (other
        ## than |annotation-xml|).
       $self->{open_elements}->[-1]->[1] == SVG_INTEGRATION_EL and
       ($token->{type} == START_TAG_TOKEN or
        $token->{type} == CHARACTER_TOKEN)) or
      ( ## If the current node is an |annotation-xml| whose |encoding|
        ## is |text/html| or |application/xhtml+xml| (HTML integration
        ## point).
       $self->{open_elements}->[-1]->[1] == MML_AXML_EL and
       ($token->{type} == START_TAG_TOKEN or
        $token->{type} == CHARACTER_TOKEN) and
       do {
         my $encoding = $self->{open_elements}->[-1]->[0]->getAttributeNS(undef, 'encoding') || '';
         $encoding =~ tr/A-Z/a-z/; ## ASCII case-insensitive.
         if ($encoding eq 'text/html' or 
             $encoding eq 'application/xhtml+xml') {
           1;
         } else {
           0;
         }
       }) or
      ($token->{type} == END_OF_FILE_TOKEN)) {
       
      ## Use the rules for the current insertion mode in HTML content.
      #
    } else {
      ## Use the rules for the foreign content.
      if ($token->{type} == CHARACTER_TOKEN) {
        ## "In foreign content", character tokens.  
        my $data = $token->{data};
        while ($data =~ s/\x00/\x{FFFD}/) {
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'NULL', token => $token);
        }
        $self->{open_elements}->[-1]->[0]->appendTextFromUnicode($self, $data, $token);
        if ($data =~ /[^\x09\x0A\x0C\x0D\x20]/) {
          delete $self->{frameset_ok};        
        }
                   
                  $token = $self->_get_next_token;
        next B;
      } elsif ($token->{type} == START_TAG_TOKEN) {
        ## "In foreign content", start tag token.
        if (
          {
            b => 1, big => 1, blockquote => 1, body => 1, br => 1,
            center => 1, code => 1, dd => 1, div => 1, dl => 1, dt => 1,
            em => 1, embed => 1, h1 => 1, h2 => 1, h3 => 1, h4 => 1,
            h5 => 1, h6 => 1, head => 1, hr => 1, i => 1, img => 1, li => 1,
            listing => 1, menu => 1, meta => 1, nobr => 1, ol => 1,
            p => 1, pre => 1, ruby => 1, s => 1, small => 1, span => 1,
            strong => 1, strike => 1, sub => 1, sup => 1, table => 1,
            tt => 1, u => 1, ul => 1, var => 1,
          }->{$token->{tag_name}} or
          ($token->{tag_name} eq 'font' and
           ($token->{attributes}->{color} or
            $token->{attributes}->{face} or
            $token->{attributes}->{size}))
        ) {           
            
                         ## "In foreign content", HTML-only start tag.
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                          text => $self->{open_elements}->[-1]->[0]
                              ->localname,
                          token => $token);
          pop @{$self->{open_elements}};
          V: {
            my $current_node = $self->{open_elements}->[-1];
            if (
              ## An HTML element.
              not $current_node->[1] & FOREIGN_EL or
              ## An MathML text integration point.
              $current_node->[1] == MML_TEXT_INTEGRATION_EL or
               
              ## An HTML integration point.
              $current_node->[1] == SVG_INTEGRATION_EL or 
              ($current_node->[1] == MML_AXML_EL and
               do {
                 my $encoding = $current_node->[0]->getAttributeNS(undef, 'encoding') || '';
                 $encoding =~ tr/A-Z/a-z/; ## ASCII case-insensitive.
                 ($encoding eq 'text/html' or
                  $encoding eq 'application/xhtml+xml');
               })
            ) {
              last V;
            }
             
            pop @{$self->{open_elements}};
            redo V;
          }
           
          ## Reprocess the token.
          next B;
        } else {
          ## "In foreign content", foreign start tag.
          my $nsuri = $self->{open_elements}->[-1]->[0]->namespaceURI;
          my $tag_name = $token->{tag_name};
          if ($nsuri eq (SVG_NS)) {
            $tag_name = {
               altglyph => 'altGlyph',
               altglyphdef => 'altGlyphDef',
               altglyphitem => 'altGlyphItem',
               animatecolor => 'animateColor',
               animatemotion => 'animateMotion',
               animatetransform => 'animateTransform',
               clippath => 'clipPath',
               feblend => 'feBlend',
               fecolormatrix => 'feColorMatrix',
               fecomponenttransfer => 'feComponentTransfer',
               fecomposite => 'feComposite',
               feconvolvematrix => 'feConvolveMatrix',
               fediffuselighting => 'feDiffuseLighting',
               fedisplacementmap => 'feDisplacementMap',
               fedistantlight => 'feDistantLight',
               feflood => 'feFlood',
               fefunca => 'feFuncA',
               fefuncb => 'feFuncB',
               fefuncg => 'feFuncG',
               fefuncr => 'feFuncR',
               fegaussianblur => 'feGaussianBlur',
               feimage => 'feImage',
               femerge => 'feMerge',
               femergenode => 'feMergeNode',
               femorphology => 'feMorphology',
               feoffset => 'feOffset',
               fepointlight => 'fePointLight',
               fespecularlighting => 'feSpecularLighting',
               fespotlight => 'feSpotLight',
               fetile => 'feTile',
               feturbulence => 'feTurbulence',
               foreignobject => 'foreignObject',
               glyphref => 'glyphRef',
               lineargradient => 'linearGradient',
               radialgradient => 'radialGradient',
               #solidcolor => 'solidColor', ## NOTE: Commented in spec (SVG1.2)
               textpath => 'textPath',  
            }->{$tag_name} || $tag_name;
          }
          ## "adjust SVG attributes" (SVG only) - done in insert-element-f
          ## "adjust foreign attributes" - done in insert-element-f
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS($nsuri, $tag_name);
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr;
                         if (defined $foreign_attr_xname->{ $attr_name })
                         {
                                 my $xmlnsuri = $foreign_attr_xname->{ $attr_name }->[0];
                                 my $qname = join ':', @{$foreign_attr_xname->{ $attr_name }->[1]};
                                 $qname =~ s/(^:)|(:$)//;
                                 $attr = $self->{document}->createAttributeNS($xmlnsuri, $qname);
                         }
                         elsif ($nsuri eq (MML_NS) && $attr_name eq 'definitionurl')
                         {
                                 $attr = $self->{document}->createAttributeNS((MML_NS), 'math:definitionURL');
                         }
                         elsif ($nsuri eq (MML_NS) )
                         {
                                 $attr = $self->{document}->createAttributeNS((MML_NS), "math:$attr_name");
                         }
                         elsif ($nsuri eq (SVG_NS) )
                         {
                                 $attr = $self->{document}->createAttributeNS(
                                        (SVG_NS), "svg:".($svg_attr_name->{$attr_name} || $attr_name));
                         }
                         unless (defined $attr)
                         {
                                 $attr = $self->{document}->createAttributeNS($nsuri, $attr_name);
                         }
                         unless (defined $attr)
                         {
                                 $attr = $self->{document}->createAttribute($attr_name);
                         }
                         if ($attr)
                         {
                                 $attr->setValue($attr_t->{value});
                                 $self->_data($attr, manakai_source_line => $attr_t->{line});
                                 $self->_data($attr, manakai_source_column => $attr_t->{column});
                                 $el->setAttributeNodeNS($attr);
                         }
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, ($el_category_f->{$nsuri}->{ $tag_name} || 0) | FOREIGN_EL | (($nsuri) eq SVG_NS ? SVG_EL : ($nsuri) eq MML_NS ? MML_EL : 0)];
  
      if ( $token->{attributes}->{xmlns} and  $token->{attributes}->{xmlns}->{value} ne ($nsuri)) {
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'bad namespace', token =>  $token);
## TODO: Error type documentation
      }
      if ( $token->{attributes}->{'xmlns:xlink'} and
           $token->{attributes}->{'xmlns:xlink'}->{value} ne q<http://www.w3.org/1999/xlink>) {
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'bad namespace', token =>  $token);
      }
    }
   
          if ($self->{self_closing}) {
            pop @{$self->{open_elements}};
            delete $self->{self_closing};
          } else {
             
          }
          $token = $self->_get_next_token;
          next B;
        }
         
      } elsif ($token->{type} == END_TAG_TOKEN) {
                  ## "In foreign content", end tag.
                         
        if ($token->{tag_name} eq 'script' and
            $self->{open_elements}->[-1]->[1] == SVG_SCRIPT_EL) {
          ## "In foreign content", "script" end tag, if the current
                         ## node is an SVG |script| element.
           
          pop @{$self->{open_elements}};
           
          ## XXXscript: Execute script here.
          $token = $self->_get_next_token;
          next B;
           
        } else {
          ## "In foreign content", end tag.
           
          ## 1.
          my $i = -1;
          my $node = $self->{open_elements}->[$i];
           
          ## 2.
          my $tag_name = $node->[0]->localname;
          $tag_name =~ tr/A-Z/a-z/; ## ASCII case-insensitive.
          if ($tag_name ne $token->{tag_name}) {
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => $token->{tag_name},
                            level => $self->{level}->{must});
          }
          ## 3.
          LOOP: {
            my $tag_name = $node->[0]->localname;
            $tag_name =~ tr/A-Z/a-z/; ## ASCII case-insensitive.
            if ($tag_name eq $token->{tag_name}) {
              splice @{$self->{open_elements}}, $i, -$i, ();
                                  $token = $self->_get_next_token;
              next B;
            }
             
            ## 4.
            $i--;
            $node = $self->{open_elements}->[$i];
            ## 5.
            if ($node->[1] & FOREIGN_EL) {
              redo LOOP;
            }
          } # LOOP
          ## Step 6 (Use the current insertion mode in HTML content)
          #
        }
      } elsif ($token->{type} == COMMENT_TOKEN) {
        ## "In foreign content", comment token.
        my $comment = $self->{document}->createComment($token->{data});
                        $self->_data($comment, manakai_source_line => $token->{line})
                                if defined $token->{line};
                        $self->_data($comment, manakai_source_column => $token->{column})
                                if defined $token->{column};
        $self->{open_elements}->[-1]->[0]->appendChild ($comment);
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{type} == DOCTYPE_TOKEN) {
         
        ## "In foreign content", DOCTYPE token.
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'in html:#DOCTYPE', token => $token);
        ## Ignore the token.
        $token = $self->_get_next_token;
        next B;
      } else {
        die "$0: $token->{type}: Unknown token type";        
      }
    } # foreign
    ## The "in table text" insertion mode.
    if ($self->{insertion_mode} & TABLE_IMS and
        not $self->{insertion_mode} & IN_CDATA_RCDATA_IM) {
      C: {
        my $s;
        if ($token->{type} == CHARACTER_TOKEN) {
           
          $self->{pending_chars} ||= [];
          push @{$self->{pending_chars}}, $token;
          $token = $self->_get_next_token;
          next B;
        } else {
          ## There is an "insert pending chars" code clone.
          if ($self->{pending_chars}) {
            $s = join '', map { $_->{data} } @{$self->{pending_chars}};
            delete $self->{pending_chars};
            while ($s =~ s/\x00//) {
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'NULL', token => $token);
            }
            if ($s eq '') {
              last C;
            } elsif ($s =~ /[^\x09\x0A\x0C\x0D\x20]/) {              
              #
            } else {
               
              $self->{open_elements}->[-1]->[0]->appendTextFromUnicode($self, $s, $token);
              last C;
            }
          } else {
             
            last C;
          }
        }
        ## "in table" insertion mode, "Anything else".
        ## Foster parenting.
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'in table:#text', token => $token);
        ## NOTE: As if in body, but insert into the foster parent element.
        $reconstruct_active_formatting_elements
            ->($self, $insert_to_foster, $active_formatting_elements,
               $open_tables);
             
        if ($self->{open_elements}->[-1]->[1] & TABLE_ROWS_EL) {
          # MUST
          my $foster_parent_element;
          my $next_sibling;
          OE: for (reverse 0..$#{$self->{open_elements}}) {
            if ($self->{open_elements}->[$_]->[1] == TABLE_EL) {
               
              $foster_parent_element = $self->{open_elements}->[$_ - 1]->[0];
              $next_sibling = $self->{open_elements}->[$_]->[0];
              undef $next_sibling
                unless $next_sibling->parentNode eq $foster_parent_element;
              last OE;
            }
          } # OE
          $foster_parent_element ||= $self->{open_elements}->[0]->[0];          
           
          $foster_parent_element->insertBefore
              ($self->{document}->createTextNode($s), $next_sibling);
          $open_tables->[-1]->[1] = 1; # tainted
          $open_tables->[-1]->[2] = 1; # ~node inserted
        } else {
          ## NOTE: Fragment case or in a foster parent'ed element
          ## (e.g. |<table><span>a|).  In fragment case, whether the
          ## character is appended to existing node or a new node is
          ## created is irrelevant, since the foster parent'ed nodes
          ## are discarded and fragment parsing does not invoke any
          ## script.
           
          $self->{open_elements}->[-1]->[0]->appendTextFromUnicode($self, $s);
                  }
      } # C
    } # TABLE_IMS      
    if ($token->{type} == DOCTYPE_TOKEN) {
       
      $self->{parse_error}->(level => $self->{level}->{must}, type => 'in html:#DOCTYPE', token => $token);
      ## Ignore the token
      ## Stay in the phase
      $token = $self->_get_next_token;
      next B;
    } elsif ($token->{type} == START_TAG_TOKEN and
             $token->{tag_name} eq 'html') {
      if ($self->{insertion_mode} == AFTER_HTML_BODY_IM) {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'after html', text => 'html', token => $token);
        $self->{insertion_mode} = AFTER_BODY_IM;
      } elsif ($self->{insertion_mode} == AFTER_HTML_FRAMESET_IM) {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'after html', text => 'html', token => $token);
        $self->{insertion_mode} = AFTER_FRAMESET_IM;
      } else {
                         
                }
       
      $self->{parse_error}->(level => $self->{level}->{must}, type => 'not first start tag', token => $token);
      my $top_el = $self->{open_elements}->[0]->[0];
      for my $attr_name (keys %{$token->{attributes}}) {
        unless ($top_el->hasAttribute($attr_name)) {
          $top_el->setAttribute
            ($attr_name, 
             $token->{attributes}->{$attr_name}->{value});
        }
      }
       
      $token = $self->_get_next_token;
      next B;
    } elsif ($token->{type} == COMMENT_TOKEN) {
      my $comment = $self->{document}->createComment ($token->{data});
                $self->_data($comment, manakai_source_line => $token->{line})
                        if defined $token->{line};
                $self->_data($comment, manakai_source_column => $token->{column})
                        if defined $token->{column};
      if ($self->{insertion_mode} & AFTER_HTML_IMS) {
         
        $self->{document}->appendChild ($comment);
      } elsif ($self->{insertion_mode} == AFTER_BODY_IM) {
         
        $self->{open_elements}->[0]->[0]->appendChild($comment);
      } else {        
        $self->{open_elements}->[-1]->[0]->appendChild($comment);
        $open_tables->[-1]->[2] = 0 if @$open_tables; # ~node inserted
                }
      $token = $self->_get_next_token;
      next B;
    } elsif ($self->{insertion_mode} & IN_CDATA_RCDATA_IM) {
      if ($token->{type} == CHARACTER_TOKEN) {
        $token->{data} =~ s/^\x0A// if $self->{ignore_newline};
        delete $self->{ignore_newline};
        if (length $token->{data}) {
                           
          ## NOTE: NULLs are replaced into U+FFFDs in tokenizer.
          $self->{open_elements}->[-1]->[0]->appendTextFromUnicode
              ($self, $token->{data}, $token);
        } else {
           
        }
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{type} == END_TAG_TOKEN) {
        delete $self->{ignore_newline};
        if ($token->{tag_name} eq 'script') {
           
           
          ## Para 1-2
          my $script = pop @{$self->{open_elements}};
           
          ## Para 3
          $self->{insertion_mode} &= ~ IN_CDATA_RCDATA_IM;
          ## Para 4
          ## TODO: $old_insertion_point = $current_insertion_point;
          ## TODO: $current_insertion_point = just before $self->{nc};
          ## Para 5
          ## TODO: Run the $script->[0].
          ## Para 6
          ## TODO: $current_insertion_point = $old_insertion_point;
          ## Para 7
          ## TODO: if ($pending_external_script) {
            ## TODO: ...
          ## TODO: }
          $token = $self->_get_next_token;
          next B;
        } else {
           
  
          pop @{$self->{open_elements}};
          $self->{insertion_mode} &= ~ IN_CDATA_RCDATA_IM;
          $token = $self->_get_next_token;
          next B;
        }
      } elsif ($token->{type} == END_OF_FILE_TOKEN) {
        delete $self->{ignore_newline};
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                        text => $self->{open_elements}->[-1]->[0]
                            ->localname,
                        token => $token);
        #if ($self->{open_elements}->[-1]->[1] == SCRIPT_EL) {
        #  ## TODO: Mark as "already executed"
        #}
        pop @{$self->{open_elements}};
                   
        $self->{insertion_mode} &= ~ IN_CDATA_RCDATA_IM;
        ## Reprocess.
        next B;
      } else {
        die "$0: $token->{type}: In CDATA/RCDATA: Unknown token type";        
      }
    } # insertion_mode
    # BEGIN:TOBYINK
    if ($self->{insertion_mode} == IN_HEAD_IM and
        ($token->{tag_name}||'') eq 'object' and
        $token->{type} == END_TAG_TOKEN and
        $self->_data($self->{'document'}, 'isHTML4')) {
           
      pop @{$self->{open_elements}}
        if $self->{open_elements}->[-1]->[0]->localname eq 'object';
    }
    # END:TOBYINK
    if ($self->{insertion_mode} & HEAD_IMS) {
      if ($token->{type} == CHARACTER_TOKEN) {
        if ($token->{data} =~ s/^([\x09\x0A\x0C\x20]+)//) {
          unless ($self->{insertion_mode} == BEFORE_HEAD_IM) {
             
            $self->{open_elements}->[-1]->[0]->appendTextFromUnicode($self, $1, $token);
          } else {
             
            ## Ignore the token.
            #
          }
          unless (length $token->{data}) {
             
            $token = $self->_get_next_token;
            next B;
          }
## TODO: set $token->{column} appropriately
        }
        if ($self->{insertion_mode} == BEFORE_HEAD_IM) {
           
          ## As if <head>
           
      $self->{head_element} = $self->{document}->createElementNS((HTML_NS), 'head');
     
        $self->_data($self->{head_element}, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($self->{head_element}, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($self->{head_element}, implied => __LINE__);
       
          $self->{open_elements}->[-1]->[0]->appendChild ($self->{head_element});
          push @{$self->{open_elements}},
              [$self->{head_element}, $el_category->{head}];
          ## Reprocess in the "in head" insertion mode...
          pop @{$self->{open_elements}};
          ## Reprocess in the "after head" insertion mode...
        } elsif ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
           
          ## As if </noscript>
          pop @{$self->{open_elements}};
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'in noscript:#text', token => $token);
           
          ## Reprocess in the "in head" insertion mode...
          ## As if </head>
          pop @{$self->{open_elements}};
          ## Reprocess in the "after head" insertion mode...
        } elsif ($self->{insertion_mode} == IN_HEAD_IM) {
           
          pop @{$self->{open_elements}};
          ## Reprocess in the "after head" insertion mode...
        } else {
           
        }
        ## "after head" insertion mode
        ## As if <body>
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), 'body');
          
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
       $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($el, implied => __LINE__);
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{'body'} || 0];
    }
   
        $self->{insertion_mode} = IN_BODY_IM;
        ## The "frameset-ok" flag is left unchanged in this case.
        ## Reporcess the token.
        next B;
      } elsif ($token->{type} == START_TAG_TOKEN) {
        if ($token->{tag_name} eq 'head') {
          if ($self->{insertion_mode} == BEFORE_HEAD_IM) {
             
             
      $self->{head_element} = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{ $token->{attributes}}) {
          my $attr_t =  $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue ($attr_t->{value});
          $self->_data($attr,manakai_source_line => $attr_t->{line});
          $self->_data($attr,manakai_source_column => $attr_t->{column});
          $self->{head_element}->setAttributeNodeNS ($attr);
        }
       
        $self->_data($self->{head_element}, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($self->{head_element}, manakai_source_column => $token->{column})
            if defined $token->{column};
       
            $self->{open_elements}->[-1]->[0]->appendChild($self->{head_element});
            push @{$self->{open_elements}},
                [$self->{head_element}, $el_category->{head}];
            $self->{insertion_mode} = IN_HEAD_IM;
             
            $token = $self->_get_next_token;
            next B;
          } elsif ($self->{insertion_mode} == AFTER_HEAD_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after head', text => 'head',
                            token => $token);
            ## Ignore the token
             
            $token = $self->_get_next_token;
            next B;
          } else {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in head:head',
                            token => $token); # or in head noscript
            ## Ignore the token
             
            $token = $self->_get_next_token;
            next B;
          }
        } elsif ($self->{insertion_mode} == BEFORE_HEAD_IM) {
           
          ## As if <head>
           
      $self->{head_element} = $self->{document}->createElementNS((HTML_NS), 'head');
     
        $self->_data($self->{head_element}, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($self->{head_element}, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($self->{head_element}, implied => __LINE__);
       
          $self->{open_elements}->[-1]->[0]->appendChild ($self->{head_element});
          push @{$self->{open_elements}},
              [$self->{head_element}, $el_category->{head}];
          $self->{insertion_mode} = IN_HEAD_IM;
          ## Reprocess in the "in head" insertion mode...
        } else {
           
        }
        if ($token->{tag_name} eq 'base') {
          if ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
             
            ## As if </noscript>
            pop @{$self->{open_elements}};
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in noscript', text => 'base',
                            token => $token);
           
            $self->{insertion_mode} = IN_HEAD_IM;
            ## Reprocess in the "in head" insertion mode...
          } else {
             
          }
          ## NOTE: There is a "as if in head" code clone.
          if ($self->{insertion_mode} == AFTER_HEAD_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after head',
                            text => $token->{tag_name}, token => $token);
            push @{$self->{open_elements}},
                [$self->{head_element}, $el_category->{head}];
          } else {
             
          }
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue ($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS($attr);
        }
       
        $self->_data($el,manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el,manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
          pop @{$self->{open_elements}};
          pop @{$self->{open_elements}} # <head>
              if $self->{insertion_mode} == AFTER_HEAD_IM;
           
          $token = $self->_get_next_token;
          next B;
        } elsif ({
          link => 1, basefont => 1, bgsound => 1,
        }->{$token->{tag_name}}) {
          ## NOTE: There is a "as if in head" code clone.
          if ($self->{insertion_mode} == AFTER_HEAD_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after head',
                            text => $token->{tag_name}, token => $token);
            push @{$self->{open_elements}},
                [$self->{head_element}, $el_category->{head}];
          } else {
             
          }
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
          pop @{$self->{open_elements}};
          pop @{$self->{open_elements}} # <head>
              if $self->{insertion_mode} == AFTER_HEAD_IM;
          delete $self->{self_closing};
          $token = $self->_get_next_token;
          next B;
        } elsif ($token->{tag_name} eq 'command') {
          if ($self->{insertion_mode} == IN_HEAD_IM) {
            ## NOTE: If the insertion mode at the time of the emission
            ## of the token was "before head", $self->{insertion_mode}
            ## is already changed to |IN_HEAD_IM|.
            ## NOTE: There is a "as if in head" code clone.
             
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
            pop @{$self->{open_elements}};
            pop @{$self->{open_elements}} # <head>
                if $self->{insertion_mode} == AFTER_HEAD_IM;
            delete $self->{self_closing};
            $token = $self->_get_next_token;
            next B;
          } else {
            ## NOTE: "in head noscript" or "after head" insertion mode
            ## - in these cases, these tags are treated as same as
            ## normal in-body tags.
             
            #
          }
        } elsif ($token->{tag_name} eq 'meta') {
          ## NOTE: There is a "as if in head" code clone.
          if ($self->{insertion_mode} == AFTER_HEAD_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after head',
                            text => $token->{tag_name}, token => $token);
            push @{$self->{open_elements}},
                [$self->{head_element}, $el_category->{head}];
          } else {
             
          }
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue ($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
          my $meta_el = pop @{$self->{open_elements}};
              unless ($self->{confident}) {
                if ($token->{attributes}->{charset}) {
                   
                  ## NOTE: Whether the encoding is supported or not,
                  ## an ASCII-compatible charset is not, is handled in
                  ## the {change_encoding} callback.
                  $self->{change_encoding}
                      ->($self, $token->{attributes}->{charset}->{value},
                         $token);
                   
                  $self->_data($meta_el->[0]->getAttributeNodeNS (undef, 'charset'),
                      manakai_has_reference => $token->{attributes}->{charset}->{has_reference});
                } elsif ($token->{attributes}->{content} and
                         $token->{attributes}->{'http-equiv'}) {
                  if ($token->{attributes}->{'http-equiv'}->{value}
                      =~ /\A[Cc][Oo][Nn][Tt][Ee][Nn][Tt]-[Tt][Yy][Pp][Ee]\z/ and
                      $token->{attributes}->{content}->{value} 
                      =~ /[Cc][Hh][Aa][Rr][Ss][Ee][Tt]
                          [\x09\x0A\x0C\x0D\x20]*=
                          [\x09\x0A\x0C\x0D\x20]*(?>"([^"]*)"|'([^']*)'|
                          ([^"'\x09\x0A\x0C\x0D\x20]
                           [^\x09\x0A\x0C\x0D\x20\x3B]*))/x) {
                    ## NOTE: Whether the encoding is supported or not,
                    ## an ASCII-compatible charset is not, is handled
                    ## in the {change_encoding} callback.
                    $self->{change_encoding}
                        ->($self, defined $1 ? $1 : defined $2 ? $2 : $3,
                           $token);
                    $self->_data($meta_el->[0]->getAttributeNodeNS (undef, 'content'),
                        manakai_has_reference => $token->{attributes}->{content}->{has_reference});
                  } else {
                     
                  }
                }
              } else {
                if ($token->{attributes}->{charset}) {
                   
                  $self->_data($meta_el->[0]->getAttributeNodeNS(undef, 'charset'),
                      manakai_has_reference => $token->{attributes}->{charset}->{has_reference});
                }
                if ($token->{attributes}->{content}) {
                   
                  $self->_data($meta_el->[0]->getAttributeNodeNS(undef, 'content'),
                      manakai_has_reference => $token->{attributes}->{content}->{has_reference});
                }
              }
              pop @{$self->{open_elements}} # <head>
                  if $self->{insertion_mode} == AFTER_HEAD_IM;
              delete $self->{self_closing};
              $token = $self->_get_next_token;
              next B;
        } elsif ($token->{tag_name} eq 'title') {
          if ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
             
            ## As if </noscript>
            pop @{$self->{open_elements}};
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in noscript', text => 'title',
                            token => $token);
           
            $self->{insertion_mode} = IN_HEAD_IM;
            ## Reprocess in the "in head" insertion mode...
          } elsif ($self->{insertion_mode} == AFTER_HEAD_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after head',
                            text => $token->{tag_name}, token => $token);
            push @{$self->{open_elements}},
                [$self->{head_element}, $el_category->{head}];
          } else {
             
          }
          ## NOTE: There is a "as if in head" code clone.
          $parse_rcdata->($self, $insert, $open_tables, 1); # RCDATA
          ## NOTE: At this point the stack of open elements contain
          ## the |head| element (index == -2) and the |script| element
          ## (index == -1).  In the "after head" insertion mode the
          ## |head| element is inserted only for the purpose of
          ## providing the context for the |script| element, and
          ## therefore we can now and have to remove the element from
          ## the stack.
          splice @{$self->{open_elements}}, -2, 1, () # <head>
              if ($self->{insertion_mode} & IM_MASK) == AFTER_HEAD_IM;
          next B;
        } elsif ($token->{tag_name} eq 'style' or
                 $token->{tag_name} eq 'noframes') {
          ## NOTE: Or (scripting is enabled and tag_name eq 'noscript' and
          ## insertion mode IN_HEAD_IM)
          ## NOTE: There is a "as if in head" code clone.
          if ($self->{insertion_mode} == AFTER_HEAD_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after head',
                            text => $token->{tag_name}, token => $token);
            push @{$self->{open_elements}},
                [$self->{head_element}, $el_category->{head}];
          } else {
             
          }
          $parse_rcdata->($self, $insert, $open_tables, 0); # RAWTEXT
          splice @{$self->{open_elements}}, -2, 1, () # <head>
              if ($self->{insertion_mode} & IM_MASK) == AFTER_HEAD_IM;
          next B;
        } elsif ($token->{tag_name} eq 'noscript') {
              if ($self->{insertion_mode} == IN_HEAD_IM) {
                 
                ## NOTE: and scripting is disalbed
                 
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue ($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
                $self->{insertion_mode} = IN_HEAD_NOSCRIPT_IM;
                 
                $token = $self->_get_next_token;
                next B;
              } elsif ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'in noscript', text => 'noscript',
                                token => $token);
                ## Ignore the token
                 
                $token = $self->_get_next_token;
                next B;
              } else {
                 
                #
              }
        } elsif ($token->{tag_name} eq 'script') {
          if ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
             
            ## As if </noscript>
            pop @{$self->{open_elements}};
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in noscript', text => 'script',
                            token => $token);
           
            $self->{insertion_mode} = IN_HEAD_IM;
            ## Reprocess in the "in head" insertion mode...
          } elsif ($self->{insertion_mode} == AFTER_HEAD_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after head',
                            text => $token->{tag_name}, token => $token);
            push @{$self->{open_elements}},
                [$self->{head_element}, $el_category->{head}];
          } else {
             
          }
          ## NOTE: There is a "as if in head" code clone.
          $script_start_tag->($self, $insert, $open_tables);
          ## ISSUE: A spec bug  [Bug 6038]
          splice @{$self->{open_elements}}, -2, 1 # <head>
              if ($self->{insertion_mode} & IM_MASK) == AFTER_HEAD_IM;
          next B;
        } elsif ($token->{tag_name} eq 'body' or
                 $token->{tag_name} eq 'frameset') {
          if ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
             
            ## As if </noscript>
            pop @{$self->{open_elements}};
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in noscript',
                            text => $token->{tag_name}, token => $token);
             
            ## Reprocess in the "in head" insertion mode...
            ## As if </head>
            pop @{$self->{open_elements}};
             
            ## Reprocess in the "after head" insertion mode...
          } elsif ($self->{insertion_mode} == IN_HEAD_IM) {
             
            pop @{$self->{open_elements}};
             
            ## Reprocess in the "after head" insertion mode...
          } else {
             
          }
          ## "after head" insertion mode
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue ($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
          if ($token->{tag_name} eq 'body') {
             
            delete $self->{frameset_ok};
            $self->{insertion_mode} = IN_BODY_IM;
          } elsif ($token->{tag_name} eq 'frameset') {
             
            $self->{insertion_mode} = IN_FRAMESET_IM;
          } else {
            die "$0: tag name: $self->{tag_name}";
          }
           
          $token = $self->_get_next_token;
          next B;
        # BEGIN:TOBYINK
        } elsif ($self->{insertion_mode} == IN_HEAD_IM and
                 $token->{tag_name} =~ m'^(object|param)$' and
                 $self->_data($self->{'document'}, 'isHTML4')) {
          {
            my $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});        
            for my $attr_name (keys %{  $token->{attributes}}) {
              my $attr_t =   $token->{attributes}->{$attr_name};
              my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
              $attr->setValue($attr_t->{value});
              $self->_data($attr, manakai_source_line => $attr_t->{line});
              $self->_data($attr, manakai_source_column => $attr_t->{column});
              $el->setAttributeNodeNS($attr);
            }
            $self->_data($el, manakai_source_line => $token->{line}) if defined $token->{line};
            $self->_data($el, manakai_source_column => $token->{column}) if defined $token->{column};
            $self->{open_elements}->[-1]->[0]->appendChild ($el);
            push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
          }
          if ($token->{tag_name} eq 'param')
          {
            pop @{$self->{open_elements}};
            delete $self->{self_closing};
          }
          $token = $self->_get_next_token;
          next B;
        # END:TOBYINK  
        } else {
          #
        }
            if ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
               
              ## As if </noscript>
              pop @{$self->{open_elements}};
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'in noscript:/',
                              text => $token->{tag_name}, token => $token);
               
              ## Reprocess in the "in head" insertion mode...
              ## As if </head>
              pop @{$self->{open_elements}};
              ## Reprocess in the "after head" insertion mode...
            } elsif ($self->{insertion_mode} == IN_HEAD_IM) {
               
              ## As if </head>
              pop @{$self->{open_elements}};
              ## Reprocess in the "after head" insertion mode...
            } else {
               
            }
        ## "after head" insertion mode
        ## As if <body>
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), 'body');
     
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($el, implied => __LINE__);
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{'body'} || 0];
    }
        $self->{insertion_mode} = IN_BODY_IM;
        ## The "frameset-ok" flag is not changed in this case.
        ## Reprocess the token.
         
        next B;
      } elsif ($token->{type} == END_TAG_TOKEN) {
        ## "Before head", "in head", and "after head" insertion modes
        ## ignore most of end tags.  Exceptions are "body", "html",
        ## and "br" end tags.  "Before head" and "in head" insertion
        ## modes also recognize "head" end tag.  "In head noscript"
        ## insertion modes ignore end tags except for "noscript" and
        ## "br".
        if ($token->{tag_name} eq 'head') {
          if ($self->{insertion_mode} == BEFORE_HEAD_IM) {
             
            ## As if <head>
             
      $self->{head_element} = $self->{document}->createElementNS((HTML_NS), 'head');
     
        $self->_data($self->{head_element}, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($self->{head_element}, manakai_source_column => $token->{column})
            if defined $token->{column};
       
            $self->{open_elements}->[-1]->[0]->appendChild($self->{head_element});
            push @{$self->{open_elements}},
                [$self->{head_element}, $el_category->{head}];
            ## Reprocess in the "in head" insertion mode...
            pop @{$self->{open_elements}};
            $self->{insertion_mode} = AFTER_HEAD_IM;
            $token = $self->_get_next_token;
            next B;
          } elsif ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
             
            #
          } elsif ($self->{insertion_mode} == IN_HEAD_IM) {
             
            pop @{$self->{open_elements}};
            $self->{insertion_mode} = AFTER_HEAD_IM;
            $token = $self->_get_next_token;
            next B;
          } elsif ($self->{insertion_mode} == AFTER_HEAD_IM) {
             
            #
          } else {
            die "$0: $self->{insertion_mode}: Unknown insertion mode";
          }
        } elsif ($token->{tag_name} eq 'noscript') {
          if ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
             
            pop @{$self->{open_elements}};
            $self->{insertion_mode} = IN_HEAD_IM;
            $token = $self->_get_next_token;
            next B;
          } else {
             
            #
          }
        } elsif ({
            body => ($self->{insertion_mode} != IN_HEAD_NOSCRIPT_IM),
            html => ($self->{insertion_mode} != IN_HEAD_NOSCRIPT_IM),
            br => 1,
        }->{$token->{tag_name}}) {
          if ($self->{insertion_mode} == BEFORE_HEAD_IM) {
             
            ## (before head) as if <head>, (in head) as if </head>
             
      $self->{head_element} = $self->{document}->createElementNS((HTML_NS), 'head');
     
        $self->_data($self->{head_element}, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($self->{head_element}, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($self->{head_element}, implied => __LINE__);
       
            $self->{open_elements}->[-1]->[0]->appendChild ($self->{head_element});
            $self->{insertion_mode} = AFTER_HEAD_IM;
   
            ## Reprocess in the "after head" insertion mode...
          } elsif ($self->{insertion_mode} == IN_HEAD_IM) {
             
            ## As if </head>
            pop @{$self->{open_elements}};
            $self->{insertion_mode} = AFTER_HEAD_IM;
   
            ## Reprocess in the "after head" insertion mode...
          } elsif ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
             
            ## NOTE: Two parse errors for <head><noscript></br>
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => $token->{tag_name}, token => $token);
            ## As if </noscript>
            pop @{$self->{open_elements}};
            $self->{insertion_mode} = IN_HEAD_IM;
            ## Reprocess in the "in head" insertion mode...
            ## As if </head>
            pop @{$self->{open_elements}};
            $self->{insertion_mode} = AFTER_HEAD_IM;
            ## Reprocess in the "after head" insertion mode...
          } elsif ($self->{insertion_mode} == AFTER_HEAD_IM) {
             
            #
          } else {
            die "$0: $self->{insertion_mode}: Unknown insertion mode";
          }
          ## "after head" insertion mode
          ## As if <body>
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), 'body');
     
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($el, implied => __LINE__);
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{'body'} || 0];
    }
   
          $self->{insertion_mode} = IN_BODY_IM;
          ## The "frameset-ok" flag is left unchanged in this case.
          ## Reprocess the token.
          next B;
        }
        ## End tags are ignored by default.
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                        text => $token->{tag_name}, token => $token);
        ## Ignore the token.
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{type} == END_OF_FILE_TOKEN) {
        if ($self->{insertion_mode} == BEFORE_HEAD_IM) {
           
          ## NOTE: As if <head>
           
      $self->{head_element} = $self->{document}->createElementNS((HTML_NS), 'head');
     
        $self->_data($self->{head_element}, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($self->{head_element}, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($self->{head_element}, implied => __LINE__);
       
          $self->{open_elements}->[-1]->[0]->appendChild($self->{head_element});
                          
          #push @{$self->{open_elements}},
          #    [$self->{head_element}, $el_category->{head}];
          #$self->{insertion_mode} = IN_HEAD_IM;
          ## NOTE: Reprocess.
          ## NOTE: As if </head>
          #pop @{$self->{open_elements}};
          #$self->{insertion_mode} = IN_AFTER_HEAD_IM;
          ## NOTE: Reprocess.
           
          #
        } elsif ($self->{insertion_mode} == IN_HEAD_IM) {
           
          ## NOTE: As if </head>
          pop @{$self->{open_elements}};
          #$self->{insertion_mode} = IN_AFTER_HEAD_IM;
          ## NOTE: Reprocess.
          #
        } elsif ($self->{insertion_mode} == IN_HEAD_NOSCRIPT_IM) {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'in noscript:#eof', token => $token);
          ## As if </noscript>
          pop @{$self->{open_elements}};
          #$self->{insertion_mode} = IN_HEAD_IM;
          ## NOTE: Reprocess.
          ## NOTE: As if </head>
          pop @{$self->{open_elements}};
          #$self->{insertion_mode} = IN_AFTER_HEAD_IM;
          ## NOTE: Reprocess.
          #
        } else {
           
          #
        }
        ## NOTE: As if <body>
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), 'body');
     
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($el, implied => __LINE__);
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{'body'} || 0];
    }
   
        $self->{insertion_mode} = IN_BODY_IM;
        ## The "frameset-ok" flag is left unchanged in this case.
        ## Reprocess the token.
        next B;
      } else {
        die "$0: $token->{type}: Unknown token type";
      }
       
    } elsif ($self->{insertion_mode} & BODY_IMS) {
      if ($token->{type} == CHARACTER_TOKEN) {
        ## "In body" insertion mode, character token.  It is also used
        ## for character tokens "in foreign content" insertion
        ## mode, for certain cases.
                   
        while ($token->{data} =~ s/\x00//g) {
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'NULL', token => $token);
        }
        if ($token->{data} eq '') {
          $token = $self->_get_next_token;
          next B;
        }
                   
        $reconstruct_active_formatting_elements
          ->($self, $insert_to_current, $active_formatting_elements, $open_tables);
         
        $self->{open_elements}->[-1]->[0]->appendTextFromUnicode($self, $token->{data}, $token);
        if ($self->{frameset_ok} and
            $token->{data} =~ /[^\x09\x0A\x0C\x0D\x20]/) {
          delete $self->{frameset_ok};
        }
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{type} == START_TAG_TOKEN) {
            if ({
                 caption => 1, col => 1, colgroup => 1, tbody => 1,
                 td => 1, tfoot => 1, th => 1, thead => 1, tr => 1,
                }->{$token->{tag_name}}) {
              if (($self->{insertion_mode} & IM_MASK) == IN_CELL_IM) {
                ## have an element in table scope
                for (reverse 0..$#{$self->{open_elements}}) {
                  my $node = $self->{open_elements}->[$_];
                  if ($node->[1] == TABLE_CELL_EL) {
                     
                    ## Close the cell
                     
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # <x>
                    $token = {type => END_TAG_TOKEN,
                              tag_name => $node->[0]->tagName,
                              line => $token->{line},
                              column => $token->{column}};
                    next B;
                  } elsif ($node->[1] & TABLE_SCOPING_EL) {
                     
                    ## ISSUE: This case can never be reached, maybe.
                    last;
                  }
                }
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'start tag not allowed',
                    text => $token->{tag_name}, token => $token);
                ## Ignore the token
                 
                $token = $self->_get_next_token;
                next B;
              } elsif (($self->{insertion_mode} & IM_MASK) == IN_CAPTION_IM) {
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed', text => 'caption',
                                token => $token);
                 
                ## NOTE: As if </caption>.
                ## have a table element in table scope
                my $i;
                INSCOPE: {
                  for (reverse 0..$#{$self->{open_elements}}) {
                    my $node = $self->{open_elements}->[$_];
                    if ($node->[1] == CAPTION_EL) {
                       
                      $i = $_;
                      last INSCOPE;
                    } elsif ($node->[1] & TABLE_SCOPING_EL) {
                       
                      last;
                    }
                  }
                   
                  $self->{parse_error}->(level => $self->{level}->{must}, type => 'start tag not allowed',
                                  text => $token->{tag_name}, token => $token);
                  ## Ignore the token
                   
                  $token = $self->_get_next_token;
                  next B;
                } # INSCOPE
                 
                ## generate implied end tags
                while ($self->{open_elements}->[-1]->[1]
                           & END_TAG_OPTIONAL_EL) {
                   
                  pop @{$self->{open_elements}};
                }
                unless ($self->{open_elements}->[-1]->[1] == CAPTION_EL) {
                   
                  $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                                  text => $self->{open_elements}->[-1]->[0]->tagName,
                                  token => $token);
                } else {
                   
                }
                 
                splice @{$self->{open_elements}}, $i;
                 
                $clear_up_to_marker->($active_formatting_elements);
                 
                $self->{insertion_mode} = IN_TABLE_IM;
                 
                ## reprocess
                 
                next B;
              } else {
                 
                #
              }
            } else {
               
              #
            }
          } elsif ($token->{type} == END_TAG_TOKEN) {
            if ($token->{tag_name} eq 'td' or $token->{tag_name} eq 'th') {
              if (($self->{insertion_mode} & IM_MASK) == IN_CELL_IM) {
                ## have an element in table scope
                my $i;
                INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                  my $node = $self->{open_elements}->[$_];
                  if ($node->[0]->tagName eq $token->{tag_name}) {
                     
                    $i = $_;
                    last INSCOPE;
                  } elsif ($node->[1] & TABLE_SCOPING_EL) {
                     
                    last INSCOPE;
                  }
                } # INSCOPE
                  unless (defined $i) {
                     
                    $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                    text => $token->{tag_name},
                                    token => $token);
                    ## Ignore the token
                    $token = $self->_get_next_token;
                    next B;
                  }
                 
                ## generate implied end tags
                while ($self->{open_elements}->[-1]->[1]
                           & END_TAG_OPTIONAL_EL) {
                   
                  pop @{$self->{open_elements}};
                }
                if ($self->{open_elements}->[-1]->[0]->tagName
                        ne $token->{tag_name}) {
                   
                  $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                                  text => $self->{open_elements}->[-1]->[0]->tagName,
                                  token => $token);
                } else {
                   
                }
                 
                splice @{$self->{open_elements}}, $i;
                 
                $clear_up_to_marker->($active_formatting_elements);
                 
                $self->{insertion_mode} = IN_ROW_IM;
                 
                $token = $self->_get_next_token;
                next B;
              } elsif (($self->{insertion_mode} & IM_MASK) == IN_CAPTION_IM) {
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                text => $token->{tag_name}, token => $token);
                ## Ignore the token
                $token = $self->_get_next_token;
                next B;
              } else {
                 
                #
              }
            } elsif ($token->{tag_name} eq 'caption') {
              if (($self->{insertion_mode} & IM_MASK) == IN_CAPTION_IM) {
                ## have a table element in table scope
                my $i;
                INSCOPE: {
                  for (reverse 0..$#{$self->{open_elements}}) {
                    my $node = $self->{open_elements}->[$_];
                    if ($node->[1] == CAPTION_EL) {
                       
                      $i = $_;
                      last INSCOPE;
                    } elsif ($node->[1] & TABLE_SCOPING_EL) {
                       
                      last;
                    }
                  }
                   
                  $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                  text => $token->{tag_name}, token => $token);
                  ## Ignore the token
                  $token = $self->_get_next_token;
                  next B;
                } # INSCOPE
                 
                ## generate implied end tags
                while ($self->{open_elements}->[-1]->[1]
                           & END_TAG_OPTIONAL_EL) {
                   
                  pop @{$self->{open_elements}};
                }
                 
                unless ($self->{open_elements}->[-1]->[1] == CAPTION_EL) {
                   
                  $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                                  text => $self->{open_elements}->[-1]->[0]->tagName,
                                  token => $token);
                } else {
                   
                }
                 
                splice @{$self->{open_elements}}, $i;
                 
                $clear_up_to_marker->($active_formatting_elements);
                 
                $self->{insertion_mode} = IN_TABLE_IM;
                 
                $token = $self->_get_next_token;
                next B;
              } elsif (($self->{insertion_mode} & IM_MASK) == IN_CELL_IM) {
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                text => $token->{tag_name}, token => $token);
                ## Ignore the token
                $token = $self->_get_next_token;
                next B;
              } else {
                 
                #
              }
            } elsif ({
                      table => 1, tbody => 1, tfoot => 1, 
                      thead => 1, tr => 1,
                     }->{$token->{tag_name}} and
                     ($self->{insertion_mode} & IM_MASK) == IN_CELL_IM) {
              ## have an element in table scope
              my $i;
              my $tn;
              INSCOPE: {
                for (reverse 0..$#{$self->{open_elements}}) {
                  my $node = $self->{open_elements}->[$_];
                  if ($node->[0]->localname eq $token->{tag_name}) {
                     
                    $i = $_;
                    ## Close the cell
                     
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # </x>
                    $token = {type => END_TAG_TOKEN, tag_name => $tn,
                              line => $token->{line},
                              column => $token->{column}};
                    next B;
                  } elsif ($node->[1] == TABLE_CELL_EL) {
                     
                    $tn = $node->[0]->tagName;
                    ## NOTE: There is exactly one |td| or |th| element
                    ## in scope in the stack of open elements by definition.
                  } elsif ($node->[1] & TABLE_SCOPING_EL) {
                    ## ISSUE: Can this be reached?
                     
                    last;
                  }
                }
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                    text => $token->{tag_name}, token => $token);
                ## Ignore the token
                $token = $self->_get_next_token;
                next B;
              } # INSCOPE
            } elsif ($token->{tag_name} eq 'table' and
                     ($self->{insertion_mode} & IM_MASK) == IN_CAPTION_IM) {
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed', text => 'caption',
                              token => $token);
              ## As if </caption>
              ## have a table element in table scope
              my $i;
              INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                my $node = $self->{open_elements}->[$_];
                if ($node->[1] == CAPTION_EL) {
                   
                  $i = $_;
                  last INSCOPE;
                } elsif ($node->[1] & TABLE_SCOPING_EL) {
                   
                  last INSCOPE;
                }
              } # INSCOPE
              unless (defined $i) {
                 
        ## TODO: Wrong error type?
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                text => 'caption', token => $token);
                ## Ignore the token
                $token = $self->_get_next_token;
                next B;
              }
               
              ## generate implied end tags
              while ($self->{open_elements}->[-1]->[1] & END_TAG_OPTIONAL_EL) {
                 
                pop @{$self->{open_elements}};
              }
              unless ($self->{open_elements}->[-1]->[1] == CAPTION_EL) {
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                                text => $self->{open_elements}->[-1]->[0]
                                    ->tagName,
                                token => $token);
              } else {
                 
              }
              splice @{$self->{open_elements}}, $i;
              $clear_up_to_marker->($active_formatting_elements);
              $self->{insertion_mode} = IN_TABLE_IM;
              ## reprocess
              next B;
            } elsif ({
                      body => 1, col => 1, colgroup => 1, html => 1,
                     }->{$token->{tag_name}}) {
              if ($self->{insertion_mode} & BODY_TABLE_IMS) {
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                text => $token->{tag_name}, token => $token);
                ## Ignore the token
                $token = $self->_get_next_token;
                next B;
              } else {
                 
                #
              }
        } elsif ({
                  tbody => 1, tfoot => 1,
                  thead => 1, tr => 1,
                 }->{$token->{tag_name}} and
                 ($self->{insertion_mode} & IM_MASK) == IN_CAPTION_IM) {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                          text => $token->{tag_name}, token => $token);
          ## Ignore the token
          $token = $self->_get_next_token;
          next B;
        } else {
           
          #
        }
      } elsif ($token->{type} == END_OF_FILE_TOKEN) {
        for my $entry (@{$self->{open_elements}}) {
          unless ($entry->[1] & ALL_END_TAG_OPTIONAL_EL) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in body:#eof', token => $token);
            last;
          }
        }
        ## Stop parsing.
        last B;
      } else {
        die "$0: $token->{type}: Unknown token type";
      }
      $insert = $insert_to_current;
      #
    } elsif ($self->{insertion_mode} & TABLE_IMS) {
      if ($token->{type} == START_TAG_TOKEN) {
        if ({
             tr => (($self->{insertion_mode} & IM_MASK) != IN_ROW_IM),
             th => 1, td => 1,
            }->{$token->{tag_name}}) {
          if (($self->{insertion_mode} & IM_MASK) == IN_TABLE_IM) {
            ## Clear back to table context
            while (not ($self->{open_elements}->[-1]->[1]
                            & TABLE_SCOPING_EL)) {
               
              pop @{$self->{open_elements}};
            }
             
             
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), 'tbody');
     
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($el, implied => __LINE__);
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{'tbody'} || 0];
    }
   
            $self->{insertion_mode} = IN_TABLE_BODY_IM;
            ## reprocess in the "in table body" insertion mode...
          }
           
          if (($self->{insertion_mode} & IM_MASK) == IN_TABLE_BODY_IM) {
            unless ($token->{tag_name} eq 'tr') {
               
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'missing start tag:tr', token => $token);
            }
                 
            ## Clear back to table body context
            while (not ($self->{open_elements}->[-1]->[1]
                            & TABLE_ROWS_SCOPING_EL)) {
               
              ## ISSUE: Can this case be reached?
              pop @{$self->{open_elements}};
            }
                 
            $self->{insertion_mode} = IN_ROW_IM;
            if ($token->{tag_name} eq 'tr') {
               
               
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
              $open_tables->[-1]->[2] = 0 if @$open_tables; # ~node inserted
               
              $token = $self->_get_next_token;
              next B;
            } else {
               
               
    {
      my $el;
       
      $el = $self->{document}->createElementNS
        ((HTML_NS), 'tr');
     
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($el, implied => __LINE__);
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{'tr'} || 0];
    }
   
              ## reprocess in the "in row" insertion mode
            }
          } else {
             
          }
              ## Clear back to table row context
              while (not ($self->{open_elements}->[-1]->[1]
                              & TABLE_ROW_SCOPING_EL)) {
                 
                pop @{$self->{open_elements}};
              }
               
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
          $open_tables->[-1]->[2] = 0 if @$open_tables; # ~node inserted
          $self->{insertion_mode} = IN_CELL_IM;
          push @$active_formatting_elements, ['#marker', '', undef];
               
           
          $token = $self->_get_next_token;
          next B;
        } elsif ({
                  caption => 1, col => 1, colgroup => 1,
                  tbody => 1, tfoot => 1, thead => 1,
                  tr => 1, # $self->{insertion_mode} == IN_ROW_IM
                 }->{$token->{tag_name}}) {
          if (($self->{insertion_mode} & IM_MASK) == IN_ROW_IM) {
            ## As if </tr>
            ## have an element in table scope
            my $i;
            INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
              my $node = $self->{open_elements}->[$_];
              if ($node->[1] == TABLE_ROW_EL) {
                 
                $i = $_;
                last INSCOPE;
              } elsif ($node->[1] & TABLE_SCOPING_EL) {
                 
                last INSCOPE;
              }
            } # INSCOPE
            unless (defined $i) { 
               
              ## TODO: This type is wrong.
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmacthed end tag',
                              text => $token->{tag_name}, token => $token);
              ## Ignore the token
               
              $token = $self->_get_next_token;
              next B;
            }
                 
                ## Clear back to table row context
                while (not ($self->{open_elements}->[-1]->[1]
                                & TABLE_ROW_SCOPING_EL)) {
                   
                  ## ISSUE: Can this case be reached?
                  pop @{$self->{open_elements}};
                }
                 
                pop @{$self->{open_elements}}; # tr
                $self->{insertion_mode} = IN_TABLE_BODY_IM;
                if ($token->{tag_name} eq 'tr') {
                   
                  ## reprocess
                   
                  next B;
                } else {
                   
                  ## reprocess in the "in table body" insertion mode...
                }
              }
              if (($self->{insertion_mode} & IM_MASK) == IN_TABLE_BODY_IM) {
                ## have an element in table scope
                my $i;
                INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                  my $node = $self->{open_elements}->[$_];
                  if ($node->[1] == TABLE_ROW_GROUP_EL) {
                     
                    $i = $_;
                    last INSCOPE;
                  } elsif ($node->[1] & TABLE_SCOPING_EL) {
                     
                    last INSCOPE;
                  }
                } # INSCOPE
                unless (defined $i) {
                   
## TODO: This erorr type is wrong.
                  $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                  text => $token->{tag_name}, token => $token);
                  ## Ignore the token
                   
                  $token = $self->_get_next_token;
                  next B;
                }
                ## Clear back to table body context
                while (not ($self->{open_elements}->[-1]->[1]
                                & TABLE_ROWS_SCOPING_EL)) {
                   
                  ## ISSUE: Can this state be reached?
                  pop @{$self->{open_elements}};
                }
                 
                ## As if <{current node}>
                ## have an element in table scope
                ## true by definition
                 
                ## Clear back to table body context
                ## nop by definition
                 
                pop @{$self->{open_elements}};
                $self->{insertion_mode} = IN_TABLE_IM;
                ## reprocess in "in table" insertion mode...
              } else {
                 
              }
          if ($token->{tag_name} eq 'col') {
            ## Clear back to table context
            while (not ($self->{open_elements}->[-1]->[1]
                            & TABLE_SCOPING_EL)) {
               
              ## ISSUE: Can this state be reached?
              pop @{$self->{open_elements}};
            }
             
             
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), 'colgroup');
     
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($el, implied => __LINE__);
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{'colgroup'} || 0];
    }
   
            $self->{insertion_mode} = IN_COLUMN_GROUP_IM;
            ## reprocess
            $open_tables->[-1]->[2] = 0 if @$open_tables; # ~node inserted
             
            next B;
          } elsif ({
                    caption => 1,
                    colgroup => 1,
                    tbody => 1, tfoot => 1, thead => 1,
                   }->{$token->{tag_name}}) {
            ## Clear back to table context
                while (not ($self->{open_elements}->[-1]->[1]
                                & TABLE_SCOPING_EL)) {
                   
                  ## ISSUE: Can this state be reached?
                  pop @{$self->{open_elements}};
                }
                 
            push @$active_formatting_elements, ['#marker', '', undef]
                if $token->{tag_name} eq 'caption';
                 
             
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
            $open_tables->[-1]->[2] = 0 if @$open_tables; # ~node inserted
            $self->{insertion_mode} = {
                                       caption => IN_CAPTION_IM,
                                       colgroup => IN_COLUMN_GROUP_IM,
                                       tbody => IN_TABLE_BODY_IM,
                                       tfoot => IN_TABLE_BODY_IM,
                                       thead => IN_TABLE_BODY_IM,
                                      }->{$token->{tag_name}};
            $token = $self->_get_next_token;
             
            next B;
          } else {
            die "$0: in table: <>: $token->{tag_name}";
          }
            } elsif ($token->{tag_name} eq 'table') {
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                              text => $self->{open_elements}->[-1]->[0]
                                  ->tagName,
                              token => $token);
              ## As if </table>
              ## have a table element in table scope
              my $i;
              INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                my $node = $self->{open_elements}->[$_];
                if ($node->[1] == TABLE_EL) {
                   
                  $i = $_;
                  last INSCOPE;
                } elsif ($node->[1] & TABLE_SCOPING_EL) {
                   
                  last INSCOPE;
                }
              } # INSCOPE
              unless (defined $i) {
                 
## TODO: The following is wrong, maybe.
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag', text => 'table',
                                token => $token);
                ## Ignore tokens </table><table>
                 
                $token = $self->_get_next_token;
                next B;
              }
               
## TODO: Followings are removed from the latest spec. 
              ## generate implied end tags
              while ($self->{open_elements}->[-1]->[1] & END_TAG_OPTIONAL_EL) {
                 
                pop @{$self->{open_elements}};
              }
              unless ($self->{open_elements}->[-1]->[1] == TABLE_EL) {
                 
                ## NOTE: |<table><tr><table>|
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                                text => $self->{open_elements}->[-1]->[0]
                                    ->tagName,
                                token => $token);
              } else {
                 
              }
              splice @{$self->{open_elements}}, $i;
              pop @{$open_tables};
              $self->_reset_insertion_mode; 
          ## reprocess
           
          next B;
        } elsif ($token->{tag_name} eq 'style') {
           
          ## NOTE: This is a "as if in head" code clone.
          $parse_rcdata->($self, $insert, $open_tables, 0); # RAWTEXT
          $open_tables->[-1]->[2] = 0 if @$open_tables; # ~node inserted
          next B;
        } elsif ($token->{tag_name} eq 'script') {
           
          ## NOTE: This is a "as if in head" code clone.
          $script_start_tag->($self, $insert, $open_tables);
          $open_tables->[-1]->[2] = 0 if @$open_tables; # ~node inserted
          next B;
        } elsif ($token->{tag_name} eq 'input') {
          if ($token->{attributes}->{type}) {
            my $type = $token->{attributes}->{type}->{value};
            $type =~ tr/A-Z/a-z/; ## ASCII case-insensitive.
            if ($type eq 'hidden') {
               
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'in table',
                              text => $token->{tag_name}, token => $token);
               
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
              $open_tables->[-1]->[2] = 0 if @$open_tables; # ~node inserted
              ## TODO: form element pointer
              pop @{$self->{open_elements}};
              $token = $self->_get_next_token;
              delete $self->{self_closing};
              next B;
            } else {
               
              #
            }
          } else {
             
            #
          }
        } elsif ($token->{tag_name} eq 'form') {
         $self->{parse_error}->(level => $self->{level}->{must}, type => 'form in table', token => $token); # XXX documentation
            
         if ($self->{form_element}) {
           ## Ignore the token.
           $token = $self->_get_next_token;
              
           next B;
           } else {
              
     {
       my $el;
        
       $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
      
         for my $attr_name (keys %{  $token->{attributes}}) {
           my $attr_t =   $token->{attributes}->{$attr_name};
           my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
           $attr->setValue($attr_t->{value});
           $self->_data($attr, manakai_source_line => $attr_t->{line});
           $self->_data($attr, manakai_source_column => $attr_t->{column});
           $el->setAttributeNodeNS($attr);
         }
        
         $self->_data($el, manakai_source_line => $token->{line})
             if defined $token->{line};
         $self->_data($el, manakai_source_column => $token->{column})
             if defined $token->{column};
        
       $self->{open_elements}->[-1]->[0]->appendChild ($el);
       push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
     }
    
             $self->{form_element} = $self->{open_elements}->[-1]->[0];
              
             pop @{$self->{open_elements}};
              
             $token = $self->_get_next_token;
              
             next B;
           }
        } else {
           
          #
        }
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'in table', text => $token->{tag_name},
                        token => $token);
        $insert = $insert_to_foster;
        #
      } elsif ($token->{type} == END_TAG_TOKEN) {
        if ($token->{tag_name} eq 'tr' and
            ($self->{insertion_mode} & IM_MASK) == IN_ROW_IM) {
          ## have an element in table scope
              my $i;
              INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                my $node = $self->{open_elements}->[$_];
                if ($node->[1] == TABLE_ROW_EL) {
                   
                  $i = $_;
                  last INSCOPE;
                } elsif ($node->[1] & TABLE_SCOPING_EL) {
                   
                  last INSCOPE;
                }
              } # INSCOPE
              unless (defined $i) {
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                text => $token->{tag_name}, token => $token);
                ## Ignore the token
                 
                $token = $self->_get_next_token;
                next B;
              } else {
                 
              }
              ## Clear back to table row context
              while (not ($self->{open_elements}->[-1]->[1]
                              & TABLE_ROW_SCOPING_EL)) {
                 
## ISSUE: Can this state be reached?
                pop @{$self->{open_elements}};
              }
              pop @{$self->{open_elements}}; # tr
              $self->{insertion_mode} = IN_TABLE_BODY_IM;
              $token = $self->_get_next_token;
               
              next B;
            } elsif ($token->{tag_name} eq 'table') {
              if (($self->{insertion_mode} & IM_MASK) == IN_ROW_IM) {
                ## As if </tr>
                ## have an element in table scope
                my $i;
                INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                  my $node = $self->{open_elements}->[$_];
                  if ($node->[1] == TABLE_ROW_EL) {
                     
                    $i = $_;
                    last INSCOPE;
                  } elsif ($node->[1] & TABLE_SCOPING_EL) {
                     
                    last INSCOPE;
                  }
                } # INSCOPE
                unless (defined $i) {
                   
## TODO: The following is wrong.
                  $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                  text => $token->{type}, token => $token);
                  ## Ignore the token
                   
                  $token = $self->_get_next_token;
                  next B;
                }
                 
                ## Clear back to table row context
                while (not ($self->{open_elements}->[-1]->[1]
                                & TABLE_ROW_SCOPING_EL)) {
                   
## ISSUE: Can this state be reached?
                  pop @{$self->{open_elements}};
                }
                 
                pop @{$self->{open_elements}}; # tr
                $self->{insertion_mode} = IN_TABLE_BODY_IM;
                ## reprocess in the "in table body" insertion mode...
              }
              if (($self->{insertion_mode} & IM_MASK) == IN_TABLE_BODY_IM) {
                ## have an element in table scope
                my $i;
                INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                  my $node = $self->{open_elements}->[$_];
                  if ($node->[1] == TABLE_ROW_GROUP_EL) {
                     
                    $i = $_;
                    last INSCOPE;
                  } elsif ($node->[1] & TABLE_SCOPING_EL) {
                     
                    last INSCOPE;
                  }
                } # INSCOPE
                unless (defined $i) {
                   
                  $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                  text => $token->{tag_name}, token => $token);
                  ## Ignore the token
                   
                  $token = $self->_get_next_token;
                  next B;
                }
                 
                ## Clear back to table body context
                while (not ($self->{open_elements}->[-1]->[1]
                                & TABLE_ROWS_SCOPING_EL)) {
                   
                  pop @{$self->{open_elements}};
                }
                 
                ## As if <{current node}>
                ## have an element in table scope
                ## true by definition
                 
                ## Clear back to table body context
                ## nop by definition
                 
                pop @{$self->{open_elements}};
                $self->{insertion_mode} = IN_TABLE_IM;
                ## reprocess in the "in table" insertion mode...
              }
              ## NOTE: </table> in the "in table" insertion mode.
              ## When you edit the code fragment below, please ensure that
              ## the code for <table> in the "in table" insertion mode
              ## is synced with it.
              ## have a table element in table scope
              my $i;
              INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                my $node = $self->{open_elements}->[$_];
                if ($node->[1] == TABLE_EL) {
                   
                  $i = $_;
                  last INSCOPE;
                } elsif ($node->[1] & TABLE_SCOPING_EL) {
                   
                  last INSCOPE;
                }
              } # INSCOPE
              unless (defined $i) {
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                text => $token->{tag_name}, token => $token);
                ## Ignore the token
                 
                $token = $self->_get_next_token;
                next B;
              }
                 
              splice @{$self->{open_elements}}, $i;
              pop @{$open_tables};
               
              $self->_reset_insertion_mode;
               
              $token = $self->_get_next_token;
              next B;
            } elsif ({
                      tbody => 1, tfoot => 1, thead => 1,
                     }->{$token->{tag_name}} and
                     $self->{insertion_mode} & ROW_IMS) {
              if (($self->{insertion_mode} & IM_MASK) == IN_ROW_IM) {
                ## have an element in table scope
                my $i;
                INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                  my $node = $self->{open_elements}->[$_];
                  if ($node->[0]->tagName eq $token->{tag_name}) {
                     
                    $i = $_;
                    last INSCOPE;
                  } elsif ($node->[1] & TABLE_SCOPING_EL) {
                     
                    last INSCOPE;
                  }
                } # INSCOPE
                  unless (defined $i) {
                     
                    $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                    text => $token->{tag_name}, token => $token);
                    ## Ignore the token
                     
                    $token = $self->_get_next_token;
                    next B;
                  }
                 
                ## As if </tr>
                ## have an element in table scope
                no warnings; my $i; use warnings;
                INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                  my $node = $self->{open_elements}->[$_];
                  if ($node->[1] == TABLE_ROW_EL) {
                     
                    $i = $_;
                    last INSCOPE;
                  } elsif ($node->[1] & TABLE_SCOPING_EL) {
                     
                    last INSCOPE;
                  }
                } # INSCOPE
                  unless (defined $i) {
                     
                    $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                    text => 'tr', token => $token);
                    ## Ignore the token
                     
                    $token = $self->_get_next_token;
                    next B;
                  }
                 
                ## Clear back to table row context
                while (not ($self->{open_elements}->[-1]->[1]
                                & TABLE_ROW_SCOPING_EL)) {
                   
## ISSUE: Can this case be reached?
                  pop @{$self->{open_elements}};
                }
                 
                pop @{$self->{open_elements}}; # tr
                $self->{insertion_mode} = IN_TABLE_BODY_IM;
                ## reprocess in the "in table body" insertion mode...
              }
              ## have an element in table scope
              my $i;
              INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
                my $node = $self->{open_elements}->[$_];
                if ($node->[0]->tagName eq $token->{tag_name}) {
                   
                  $i = $_;
                  last INSCOPE;
                } elsif ($node->[1] & TABLE_SCOPING_EL) {
                   
                  last INSCOPE;
                }
              } # INSCOPE
              unless (defined $i) {
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                text => $token->{tag_name}, token => $token);
                ## Ignore the token
                 
                $token = $self->_get_next_token;
                next B;
              }
              ## Clear back to table body context
              while (not ($self->{open_elements}->[-1]->[1]
                              & TABLE_ROWS_SCOPING_EL)) {
                 
## ISSUE: Can this case be reached?
                pop @{$self->{open_elements}};
              }
              pop @{$self->{open_elements}};
              $self->{insertion_mode} = IN_TABLE_IM;
               
              $token = $self->_get_next_token;
              next B;
            } elsif ({
                      body => 1, caption => 1, col => 1, colgroup => 1,
                      html => 1, td => 1, th => 1,
                      tr => 1, # $self->{insertion_mode} == IN_ROW_IM
                      tbody => 1, tfoot => 1, thead => 1, # $self->{insertion_mode} == IN_TABLE_IM
                     }->{$token->{tag_name}}) {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                          text => $token->{tag_name}, token => $token);
          ## Ignore the token
           
           $token = $self->_get_next_token;
          next B;
        } else {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'in table:/',
                          text => $token->{tag_name}, token => $token);
          $insert = $insert_to_foster;
          #
        }
      } elsif ($token->{type} == END_OF_FILE_TOKEN) {
        unless ($self->{open_elements}->[-1]->[1] == HTML_EL and
                @{$self->{open_elements}} == 1) { # redundant, maybe
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'in body:#eof', token => $token);
           
          #
        } else {
           
          #
        }
        ## Stop parsing
        last B;
      } else {
        die "$0: $token->{type}: Unknown token type";
      }
    } elsif (($self->{insertion_mode} & IM_MASK) == IN_COLUMN_GROUP_IM) {
          if ($token->{type} == CHARACTER_TOKEN) {
            if ($token->{data} =~ s/^([\x09\x0A\x0C\x20]+)//) {
              $self->{open_elements}->[-1]->[0]->appendTextFromUnicode($self, $1, $token);
              unless (length $token->{data}) {
                 
                $token = $self->_get_next_token;
                next B;
              }
            }
             
             
            #
          } elsif ($token->{type} == START_TAG_TOKEN) {
            if ($token->{tag_name} eq 'col') {
               
               
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
              pop @{$self->{open_elements}};
              delete $self->{self_closing};
              $token = $self->_get_next_token;
              next B;
            } else { 
               
              #
            }
          } elsif ($token->{type} == END_TAG_TOKEN) {
            if ($token->{tag_name} eq 'colgroup') {
              if ($self->{open_elements}->[-1]->[1] == HTML_EL) {
                 
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                                text => 'colgroup', token => $token);
                ## Ignore the token
                $token = $self->_get_next_token;
                next B;
              } else {
                 
                pop @{$self->{open_elements}}; # colgroup
                $self->{insertion_mode} = IN_TABLE_IM;
                $token = $self->_get_next_token;
                next B;             
              }
            } elsif ($token->{tag_name} eq 'col') {
               
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                              text => 'col', token => $token);
              ## Ignore the token
              $token = $self->_get_next_token;
              next B;
            } else {
               
              # 
            }
      } elsif ($token->{type} == END_OF_FILE_TOKEN) {
        if ($self->{open_elements}->[-1]->[1] == HTML_EL and
            @{$self->{open_elements}} == 1) { # redundant, maybe
           
          ## Stop parsing.
          last B;
        } else {
          ## NOTE: As if </colgroup>.
           
          pop @{$self->{open_elements}}; # colgroup
          $self->{insertion_mode} = IN_TABLE_IM;
          ## Reprocess.
          next B;
        }
      } else {
        die "$0: $token->{type}: Unknown token type";
      }
          ## As if </colgroup>
          if ($self->{open_elements}->[-1]->[1] == HTML_EL) {
             
## TODO: Wrong error type?
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => 'colgroup', token => $token);
            ## Ignore the token
             
            $token = $self->_get_next_token;
            next B;
          } else {
             
            pop @{$self->{open_elements}}; # colgroup
            $self->{insertion_mode} = IN_TABLE_IM;
             
            ## reprocess
            next B;
          }
    } elsif ($self->{insertion_mode} & SELECT_IMS) {
      if ($token->{type} == CHARACTER_TOKEN) {
         
        my $data = $token->{data};
        while ($data =~ s/\x00//) {
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'NULL', token => $token);
        }
        $self->{open_elements}->[-1]->[0]->appendTextFromUnicode($self, $data, $token)
            if $data ne '';
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{type} == START_TAG_TOKEN) {
        if ($token->{tag_name} eq 'option') {
          if ($self->{open_elements}->[-1]->[1] == OPTION_EL) {
             
            ## As if </option>
            pop @{$self->{open_elements}};
          } else {
             
          }
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
           
          $token = $self->_get_next_token;
          next B;
        } elsif ($token->{tag_name} eq 'optgroup') {
          if ($self->{open_elements}->[-1]->[1] == OPTION_EL) {
             
            ## As if </option>
            pop @{$self->{open_elements}};
          } else {
             
          }
          if ($self->{open_elements}->[-1]->[1] == OPTGROUP_EL) {
             
            ## As if </optgroup>
            pop @{$self->{open_elements}};
          } else {
             
          }
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
           
          $token = $self->_get_next_token;
          next B;
        } elsif ($token->{tag_name} eq 'select') {
          ## "In select" / "in select in table" insertion mode,
          ## "select" start tag.
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'select in select', ## XXX: documentation
                          token => $token);
          ## Act as if the token were </select>.
          $token = {type => END_TAG_TOKEN, tag_name => 'select',
                    line => $token->{line}, column => $token->{column}};
          next B;
        } elsif ({
          input => 1, textarea => 1, keygen => 1,
        }->{$token->{tag_name}}) {
          ## "In select" / "in select in table" insertion mode,
          ## "input", "keygen", "textarea" start tag.
           
          ## Parse error.
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed', text => 'select',
                          token => $token); 
                           
          ## If there "have an element in select scope" where element    
          ## is a |select| element.
          my $i;
          INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
            my $node = $self->{open_elements}->[$_];
            if ($node->[1] == SELECT_EL) {
               
              $i = $_;
              last INSCOPE;
            } elsif ($node->[1] == OPTGROUP_EL or
                     $node->[1] == OPTION_EL) {
               
              #
            } else {
               
              last INSCOPE;
            }
          } # INSCOPE
          unless (defined $i) {
            ## Ignore the token.
             
            $token = $self->_get_next_token;
            next B;
          }
          ## Otherwise, act as if there were </select>, then reprocess
          ## the token.
          $token->{self_closing} = $self->{self_closing};
          unshift @{$self->{token}}, $token;
          delete $self->{self_closing};
     
          $token = {type => END_TAG_TOKEN, tag_name => 'select',
                    line => $token->{line}, column => $token->{column}};
          next B;
  
        } elsif (
          ($self->{insertion_mode} & IM_MASK) == IN_SELECT_IN_TABLE_IM and
          {
            caption => 1, table => 1, tbody => 1, tfoot => 1, thead => 1,
            tr => 1, td => 1, th => 1,
          }->{$token->{tag_name}}
        ) {
          ## "In select in table" insertion mode, table-related start
          ## tags.
          ## Parse error.
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed', text => 'select',
                          token => $token);
          ## Act as if there were </select>, then reprocess the token.
           
          $token->{self_closing} = $self->{self_closing};
          unshift @{$self->{token}}, $token;
          delete $self->{self_closing};
     
          $token = {type => END_TAG_TOKEN, tag_name => 'select',
                    line => $token->{line}, column => $token->{column}};
          next B;
           
        } elsif ($token->{tag_name} eq 'script') {
           
          ## NOTE: This is an "as if in head" code clone
          $script_start_tag->($self, $insert, $open_tables);
          next B;
        } else {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'in select',
                          text => $token->{tag_name}, token => $token);
          ## Ignore the token
           
          $token = $self->_get_next_token;
          next B;
        }
         
      } elsif ($token->{type} == END_TAG_TOKEN) {
        if ($token->{tag_name} eq 'optgroup') {
          if ($self->{open_elements}->[-1]->[1] == OPTION_EL and
              $self->{open_elements}->[-2]->[1] == OPTGROUP_EL) {
             
            ## As if </option>
            splice @{$self->{open_elements}}, -2;
          } elsif ($self->{open_elements}->[-1]->[1] == OPTGROUP_EL) {
             
            pop @{$self->{open_elements}};
          } else {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => $token->{tag_name}, token => $token);
            ## Ignore the token
          }
           
          $token = $self->_get_next_token;
          next B;
        } elsif ($token->{tag_name} eq 'option') {
          if ($self->{open_elements}->[-1]->[1] == OPTION_EL) {
             
            pop @{$self->{open_elements}};
          } else {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => $token->{tag_name}, token => $token);
            ## Ignore the token
          }
           
          $token = $self->_get_next_token;
          next B;
           
        } elsif ($token->{tag_name} eq 'select') {
          ## "In select" / "in select in table" insertion mode,
          ## "select" end tag.
           
          ## There "have an element in select scope" where the element
          ## is |select|.
          my $i;
          INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
            my $node = $self->{open_elements}->[$_];
            if ($node->[1] == SELECT_EL) {
               
              $i = $_;
              last INSCOPE;
            } elsif ($node->[1] == OPTION_EL or
                     $node->[1] == OPTGROUP_EL) {
               
              #
            } else {
   
              last INSCOPE;
            }
          } # INSCOPE
          unless (defined $i) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => $token->{tag_name}, token => $token);
            ## Ignore the token.
             
            $token = $self->_get_next_token;
            next B;
          }
           
          ## Otherwise,
           
          splice @{$self->{open_elements}}, $i;
          $self->_reset_insertion_mode;
           
          $token = $self->_get_next_token;
          next B;
           
        } elsif (
          ($self->{insertion_mode} & IM_MASK) == IN_SELECT_IN_TABLE_IM and
          {
            caption => 1, table => 1, tbody => 1, tfoot => 1, thead => 1,
            tr => 1, td => 1, th => 1,
          }->{$token->{tag_name}}
        ) {
          ## "In select in table" insertion mode, table-related end
          ## tags.
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                          text => $token->{tag_name}, token => $token);
          ## There "have an element in table scope" where the element
          ## is same tag name as |$token|.
          my $i;
          INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
            my $node = $self->{open_elements}->[$_];
            if ($node->[0]->tagName eq $token->{tag_name}) {
               
              $i = $_;
              last INSCOPE;
            } elsif ($node->[1] & TABLE_SCOPING_EL) {
               
              last INSCOPE;
            }
          } # INSCOPE
          unless (defined $i) {
             
            ## Ignore the token
             
            $token = $self->_get_next_token;
            next B;
          }
          ## Act as if there were </select>, then reprocess the token.
          $token->{self_closing} = $self->{self_closing};
          unshift @{$self->{token}}, $token;
          delete $self->{self_closing};
     
          $token = {type => END_TAG_TOKEN, tag_name => 'select',
                    line => $token->{line}, column => $token->{column}};
          next B;
           
        } else {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'in select:/',
                          text => $token->{tag_name}, token => $token);
          ## Ignore the token
           
          $token = $self->_get_next_token;
          next B;
        }
      } elsif ($token->{type} == END_OF_FILE_TOKEN) {
        unless ($self->{open_elements}->[-1]->[1] == HTML_EL and
                @{$self->{open_elements}} == 1) { # redundant, maybe
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'in body:#eof', token => $token);
        } else {
           
        }
        ## Stop parsing.
        last B;
      } else {
        die "$0: $token->{type}: Unknown token type";
      }
    } elsif ($self->{insertion_mode} & BODY_AFTER_IMS) {
      if ($token->{type} == CHARACTER_TOKEN) {
        if ($token->{data} =~ s/^([\x09\x0A\x0C\x20]+)//) {
          my $data = $1;
          ## As if in body
          $reconstruct_active_formatting_elements
                                ->($self, $insert_to_current, $active_formatting_elements, $open_tables);
               
          $self->{open_elements}->[-1]->[0]->appendTextFromUnicode($self, $1, $token);
           
          unless (length $token->{data}) {
             
            $token = $self->_get_next_token;
            next B;
          }
        }
         
        if ($self->{insertion_mode} == AFTER_HTML_BODY_IM) {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'after html:#text', token => $token);
          #
        } else {
           
          ## "after body" insertion mode
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'after body:#text', token => $token);
          #
        }
        $self->{insertion_mode} = IN_BODY_IM;
        ## reprocess
        next B;
      } elsif ($token->{type} == START_TAG_TOKEN) {
        if ($self->{insertion_mode} == AFTER_HTML_BODY_IM) {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'after html',
                          text => $token->{tag_name}, token => $token);
          #
        } else {
           
          ## "after body" insertion mode
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'after body',
                          text => $token->{tag_name}, token => $token);
          #
        }
        $self->{insertion_mode} = IN_BODY_IM;
         
        ## reprocess
        next B;
      } elsif ($token->{type} == END_TAG_TOKEN) {
        if ($self->{insertion_mode} == AFTER_HTML_BODY_IM) {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'after html:/',
                          text => $token->{tag_name}, token => $token);
           
          $self->{insertion_mode} = IN_BODY_IM;
          ## Reprocess.
          next B;
        } else {
           
        }
        ## "after body" insertion mode
        if ($token->{tag_name} eq 'html') {
          if (defined $self->{inner_html_node}) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => 'html', token => $token);
            ## Ignore the token
            $token = $self->_get_next_token;
            next B;
          } else {
             
            $self->{insertion_mode} = AFTER_HTML_BODY_IM;
            $token = $self->_get_next_token;
            next B;
          }
        } else {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'after body:/',
                          text => $token->{tag_name}, token => $token);
          $self->{insertion_mode} = IN_BODY_IM;
          ## reprocess
          next B;
        }
      } elsif ($token->{type} == END_OF_FILE_TOKEN) {
         
        ## Stop parsing
        last B;
      } else {
        die "$0: $token->{type}: Unknown token type";
      }
    } elsif ($self->{insertion_mode} & FRAME_IMS) {
      if ($token->{type} == CHARACTER_TOKEN) {
        if ($token->{data} =~ s/^([\x09\x0A\x0C\x20]+)//) {
          $self->{open_elements}->[-1]->[0]->appendTextFromUnicode($self, $1, $token);
           
          unless (length $token->{data}) {
             
            $token = $self->_get_next_token;
            next B;
          }
        }
         
        if ($token->{data} =~ s/^[^\x09\x0A\x0C\x20]+//) {
          if ($self->{insertion_mode} == IN_FRAMESET_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in frameset:#text', token => $token);
          } elsif ($self->{insertion_mode} == AFTER_FRAMESET_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after frameset:#text', token => $token);
          } else { # "after after frameset"
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after html:#text', token => $token);
          }
           
          ## Ignore the token.
          if (length $token->{data}) {
             
            ## reprocess the rest of characters
          } else {
             
            $token = $self->_get_next_token;
          }
          next B;
        }
         
        die qq[$0: Character "$token->{data}"];
      } elsif ($token->{type} == START_TAG_TOKEN) {
        if ($token->{tag_name} eq 'frameset' and
            $self->{insertion_mode} == IN_FRAMESET_IM) {
           
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
           
          $token = $self->_get_next_token;
          next B;
        } elsif ($token->{tag_name} eq 'frame' and
                 $self->{insertion_mode} == IN_FRAMESET_IM) {
           
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $self->{open_elements}->[-1]->[0]->appendChild ($el);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
          pop @{$self->{open_elements}};
          delete $self->{self_closing};
          $token = $self->_get_next_token;
          next B;
        } elsif ($token->{tag_name} eq 'noframes') {
           
          ## NOTE: As if in head.
          $parse_rcdata->($self, $insert, $open_tables, 0); # RAWTEXT
          next B;
          ## NOTE: |<!DOCTYPE HTML><frameset></frameset></html><noframes></noframes>|
          ## has no parse error.
        } else {
          if ($self->{insertion_mode} == IN_FRAMESET_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in frameset',
                            text => $token->{tag_name}, token => $token);
          } elsif ($self->{insertion_mode} == AFTER_FRAMESET_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after frameset',
                            text => $token->{tag_name}, token => $token);
          } else { # "after after frameset"
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after after frameset',
                            text => $token->{tag_name}, token => $token);
          }
          ## Ignore the token
           
          $token = $self->_get_next_token;
          next B;
        }
      } elsif ($token->{type} == END_TAG_TOKEN) {
        if ($token->{tag_name} eq 'frameset' and
            $self->{insertion_mode} == IN_FRAMESET_IM) {
          if ($self->{open_elements}->[-1]->[1] == HTML_EL and
              @{$self->{open_elements}} == 1) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => $token->{tag_name}, token => $token);
            ## Ignore the token
            $token = $self->_get_next_token;
          } else {
             
            pop @{$self->{open_elements}};
            $token = $self->_get_next_token;
          }
          if (not defined $self->{inner_html_node} and
              not ($self->{open_elements}->[-1]->[1] == FRAMESET_EL)) {
             
            $self->{insertion_mode} = AFTER_FRAMESET_IM;
          } else {
             
          }
          next B;
        } elsif ($token->{tag_name} eq 'html' and
                 $self->{insertion_mode} == AFTER_FRAMESET_IM) {
           
          $self->{insertion_mode} = AFTER_HTML_FRAMESET_IM;
          $token = $self->_get_next_token;
          next B;
        } else {
          if ($self->{insertion_mode} == IN_FRAMESET_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in frameset:/',
                            text => $token->{tag_name}, token => $token);
          } elsif ($self->{insertion_mode} == AFTER_FRAMESET_IM) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after frameset:/',
                            text => $token->{tag_name}, token => $token);
          } else { # "after after html"
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'after after frameset:/',
                            text => $token->{tag_name}, token => $token);
          }
          ## Ignore the token
          $token = $self->_get_next_token;
          next B;
        }
      } elsif ($token->{type} == END_OF_FILE_TOKEN) {
        unless ($self->{open_elements}->[-1]->[1] == HTML_EL and
                @{$self->{open_elements}} == 1) { # redundant, maybe
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'in body:#eof', token => $token);
        } else {
           
        }
         
        ## Stop parsing
        last B;
      } else {
        die "$0: $token->{type}: Unknown token type";
      }
    } else {
      die "$0: $self->{insertion_mode}: Unknown insertion mode";
    }
    ## "in body" insertion mode
    if ($token->{type} == START_TAG_TOKEN) {
      if ($token->{tag_name} eq 'script') {
         
        ## NOTE: This is an "as if in head" code clone
        $script_start_tag->($self, $insert, $open_tables);
        next B;
      } elsif ($token->{tag_name} eq 'style') {
         
        ## NOTE: This is an "as if in head" code clone
        $parse_rcdata->($self, $insert, $open_tables, 0); # RAWTEXT
        next B;
      } elsif ({
         base => 1, command => 1, link => 1, basefont => 1, bgsound => 1,
       }->{$token->{tag_name}}) {
         
        ## NOTE: This is an "as if in head" code clone, only "-t" differs
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
        pop @{$self->{open_elements}};
        delete $self->{self_closing};
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'meta') {
        ## NOTE: This is an "as if in head" code clone, only "-t" differs
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
        my $meta_el = pop @{$self->{open_elements}};
        unless ($self->{confident}) {
          if ($token->{attributes}->{charset}) {
             
            ## NOTE: Whether the encoding is supported or not is
            ## handled in the {change_encoding} callback.
            $self->{change_encoding}
                ->($self, $token->{attributes}->{charset}->{value}, $token);
             
            $self->_data($meta_el->[0]->getAttributeNodeNS(undef, 'charset'),
                manakai_has_reference => $token->{attributes}->{charset}->{has_reference});
                                          
          } elsif ($token->{attributes}->{content} and
                   $token->{attributes}->{'http-equiv'}) {
            if ($token->{attributes}->{'http-equiv'}->{value}
                =~ /\A[Cc][Oo][Nn][Tt][Ee][Nn][Tt]-[Tt][Yy][Pp][Ee]\z/ and
                $token->{attributes}->{content}->{value}
                =~ /[Cc][Hh][Aa][Rr][Ss][Ee][Tt]
                    [\x09\x0A\x0C\x0D\x20]*=
                    [\x09\x0A\x0C\x0D\x20]*(?>"([^"]*)"|'([^']*)'|
                    ([^"'\x09\x0A\x0C\x0D\x20][^\x09\x0A\x0C\x0D\x20\x3B]*))
                   /x) {
               
              ## NOTE: Whether the encoding is supported or not is handled
              ## in the {change_encoding} callback.
              $self->{change_encoding}
                  ->($self, defined $1 ? $1 : defined $2 ? $2 : $3, $token);
              $self->_data($meta_el->[0]->getAttributeNodeNS(undef, 'content'),
                  manakai_has_reference => $token->{attributes}->{content}->{has_reference});
            }
          }
        } else {
          if ($token->{attributes}->{charset}) {
             
            $self->_data($meta_el->[0]->getAttributeNodeNS(undef, 'charset'),
                manakai_has_reference => $token->{attributes}->{charset}->{has_reference});
          }
          if ($token->{attributes}->{content}) {
             
            $self->_data($meta_el->[0]->getAttributeNodeNS (undef, 'content'),
                                        manakai_has_reference => $token->{attributes}->{content}->{has_reference});
          }
        }
        delete $self->{self_closing};
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'title') {
         
        ## NOTE: This is an "as if in head" code clone
        $parse_rcdata->($self, $insert, $open_tables, 1); # RCDATA
        next B;
         
      } elsif ($token->{tag_name} eq 'body') {
        ## "In body" insertion mode, "body" start tag token.
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'in body', text => 'body', token => $token);
               
        if (@{$self->{open_elements}} == 1 or
            not ($self->{open_elements}->[1]->[1] == BODY_EL)) {
           
          ## Ignore the token
        } else {
          delete $self->{frameset_ok};
          my $body_el = $self->{open_elements}->[1]->[0];
          for my $attr_name (keys %{$token->{attributes}}) {
            unless ($body_el->hasAttribute($attr_name)) {
               
              $body_el->setAttribute($attr_name,
                 $token->{attributes}->{$attr_name}->{value});
            }
          }
        }
         
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'frameset') {
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'in body', text => $token->{tag_name},
                        token => $token);
        if (@{$self->{open_elements}} == 1 or
            not ($self->{open_elements}->[1]->[1] == BODY_EL)) {
           
          ## Ignore the token.
        } elsif (not $self->{frameset_ok}) {
           
          ## Ignore the token.
        } else {
           
           
          ## 1. Remove the second element.
          my $body = $self->{open_elements}->[1]->[0];
          my $body_parent = $body->parentNode;
          $body_parent->removeChild ($body) if $body_parent;
          ## 2. Pop nodes.
          splice @{$self->{open_elements}}, 1;
          ## 3. Insert.
           
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
          ## 4. Switch.
          $self->{insertion_mode} = IN_FRAMESET_IM;
        }
         
        $token = $self->_get_next_token;
        next B;
         
      } elsif ({
        ## "In body" insertion mode, non-phrasing flow-content
        ## elements start tags.
        address => 1, article => 1, aside => 1, blockquote => 1,
        center => 1, details => 1, dir => 1, div => 1, dl => 1,
        fieldset => 1, figcaption => 1, figure => 1, footer => 1,
        header => 1, hgroup => 1, menu => 1, nav => 1, ol => 1,
        p => 1, section => 1, ul => 1, summary => 1,
        # datagrid => 1,
        ## Closing any heading element
        h1 => 1, h2 => 1, h3 => 1, h4 => 1, h5 => 1, h6 => 1, 
        ## Ignoring any leading newline in content
        pre => 1, listing => 1,
        ## Form element pointer
        form => 1,
         
        ## A quirk & switching of insertion mode
        table => 1,
        ## Void element
        hr => 1,
      }->{$token->{tag_name}}) {
        ## 1. When there is an opening |form| element:
        if ($token->{tag_name} eq 'form' and defined $self->{form_element}) {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'in form:form', token => $token);
          ## Ignore the token
           
          $token = $self->_get_next_token;
          next B;
        }
        ## 2. Close the |p| element, if any.
        if ($token->{tag_name} ne 'table' or # The Hixie Quirk
            ($self->_data($self->{document})->{'manakai_compat_mode'}||'') ne 'quirks') {
          ## "have a |p| element in button scope"
          INSCOPE: for (reverse @{$self->{open_elements}}) {
            if ($_->[1] == P_EL) {
               
               
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # <form>
              $token = {type => END_TAG_TOKEN, tag_name => 'p',
                        line => $token->{line}, column => $token->{column}};
              next B;
            } elsif ($_->[1] & BUTTON_SCOPING_EL) {
               
              last INSCOPE;
            }
          } # INSCOPE
        }
        ## 3. Close the opening <hn> element, if any.
        if ({h1 => 1, h2 => 1, h3 => 1,
             h4 => 1, h5 => 1, h6 => 1}->{$token->{tag_name}}) {
          if ($self->{open_elements}->[-1]->[1] == HEADING_EL) {
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                            text => $self->{open_elements}->[-1]->[0]->tagName,
                            token => $token);
            pop @{$self->{open_elements}};
          }
        }
        ## 4. Insertion.
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          $attr_name =~ s/[^A-Za-z0-9:_-]//g;
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
        if ($token->{tag_name} eq 'pre' or $token->{tag_name} eq 'listing') {
           
          $token = $self->_get_next_token;
          if ($token->{type} == CHARACTER_TOKEN) {
            $token->{data} =~ s/^\x0A//;
            unless (length $token->{data}) {
               
              $token = $self->_get_next_token;
            } else {
               
            }
          } else {
             
          }
          delete $self->{frameset_ok};
        } elsif ($token->{tag_name} eq 'form') {
           
          $self->{form_element} = $self->{open_elements}->[-1]->[0];
           
          $token = $self->_get_next_token;
        } elsif ($token->{tag_name} eq 'table') {
           
          push @{$open_tables}, [$self->{open_elements}->[-1]->[0]];
          delete $self->{frameset_ok};
           
          $self->{insertion_mode} = IN_TABLE_IM;
           
          $token = $self->_get_next_token;
        } elsif ($token->{tag_name} eq 'hr') {
           
          pop @{$self->{open_elements}};
           
          delete $self->{self_closing};
          delete $self->{frameset_ok};
          $token = $self->_get_next_token;
        } else {
           
          $token = $self->_get_next_token;
        }
        next B;
      } elsif ($token->{tag_name} eq 'li') {
        ## "In body" insertion mode, "li" start tag.  As normal, but
        ## imply </li> when there's another <li>.
        ## NOTE: Special, Scope (<li><foo><li> == <li><foo><li/></foo></li>)::
          ## Interpreted as <li><foo/></li><li/> (non-conforming):
          ## blockquote (O9.27), center (O), dd (Fx3, O, S3.1.2, IE7),
          ## dt (Fx, O, S, IE), dl (O), fieldset (O, S, IE), form (Fx, O, S),
          ## hn (O), pre (O), applet (O, S), button (O, S), marquee (Fx, O, S),
          ## object (Fx)
          ## Generate non-tree (non-conforming):
          ## basefont (IE7 (where basefont is non-void)), center (IE),
          ## form (IE), hn (IE)
        ## address, div, p (<li><foo><li> == <li><foo/></li><li/>)::
          ## Interpreted as <li><foo><li/></foo></li> (non-conforming):
          ## div (Fx, S)
        ## 1. Frameset-ng
        delete $self->{frameset_ok};
        my $non_optional;
        my $i = -1;
        ## 2.
        for my $node (reverse @{$self->{open_elements}}) {
          if ($node->[1] == LI_EL) {
            ## 3. (a) As if </li>
            {
              ## If no </li> - not applied
              #
              ## Otherwise
              ## 1. generate implied end tags, except for </li>
              #
              ## 2. If current node != "li", parse error
              if ($non_optional) {
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                                text => $non_optional->[0]->tagName,
                                token => $token);
                 
              } else {
                 
              }
              ## 3. Pop
              splice @{$self->{open_elements}}, $i;
            }
            last; ## 3. (b) goto 5.
          } elsif (
                   ## NOTE: "special" category
                   ($node->[1] & SPECIAL_EL or
                    $node->[1] & SCOPING_EL) and
                   ## NOTE: "li", "dt", and "dd" are in |SPECIAL_EL|.
                   (not $node->[1] & ADDRESS_DIV_P_EL)
                  ) {
            ## 4.
             
            last; ## goto 6.
          } elsif ($node->[1] & END_TAG_OPTIONAL_EL) {
             
            #
          } else {
             
            $non_optional ||= $node;
            #
          }
          ## 5.
          ## goto 3.
          $i--;
        }
        ## 6. (a) "have a |p| element in button scope".
        INSCOPE: for (reverse @{$self->{open_elements}}) {
          if ($_->[1] == P_EL) {
             
            ## NOTE: |<p><li>|, for example.
             
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # <x>
            $token = {type => END_TAG_TOKEN, tag_name => 'p',
                      line => $token->{line}, column => $token->{column}};
            next B;
          } elsif ($_->[1] & BUTTON_SCOPING_EL) {
             
            last INSCOPE;
          }
        } # INSCOPE
        ## 6. (b) insert
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
         
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'dt' or $token->{tag_name} eq 'dd') {
        ## "In body" insertion mode, "dt" or "dd" start tag.  As
        ## normal, but imply </dt> or </dd> when there's antoher <dt>
        ## or <dd>.
        ## 1. Frameset-ng
        delete $self->{frameset_ok};
        my $non_optional;
        my $i = -1;
        ## 2.
        for my $node (reverse @{$self->{open_elements}}) {
          if ($node->[1] == DTDD_EL) {
            ## 3. (a) As if </li>
            {
              ## If no </li> - not applied
              #
              ## Otherwise
              ## 1. generate implied end tags, except for </dt> or </dd>
              #
              ## 2. If current node != "dt"|"dd", parse error
              if ($non_optional) {
                $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                                text => $non_optional->[0]->tagName,
                                token => $token);
                 
              } else {
                 
              }
              ## 3. Pop
              splice @{$self->{open_elements}}, $i;
            }
            last; ## 3. (b) goto 5.
          } elsif (
                   ## NOTE: "special" category
                   ($node->[1] & SPECIAL_EL or $node->[1] & SCOPING_EL) and
                   ## NOTE: "li", "dt", and "dd" are in |SPECIAL_EL|.
                   (not $node->[1] & ADDRESS_DIV_P_EL)
                  ) {
            ## 4.
             
            last; ## goto 5.
          } elsif ($node->[1] & END_TAG_OPTIONAL_EL) {
             
            #
          } else {
             
            $non_optional ||= $node;
            #
          }
          ## 5.
          ## goto 3.
          $i--;
        }
        ## 6. (a) "have a |p| element in button scope".
        INSCOPE: for (reverse @{$self->{open_elements}}) {
          if ($_->[1] == P_EL) {
             
             
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # <x>
            $token = {type => END_TAG_TOKEN, tag_name => 'p',
                      line => $token->{line}, column => $token->{column}};
            next B;
          } elsif ($_->[1] & BUTTON_SCOPING_EL) {
             
            last INSCOPE;
          }
        } # INSCOPE
        ## 6. (b) insert
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
         
        $token = $self->_get_next_token;
        next B;
         
      } elsif ($token->{tag_name} eq 'plaintext') {
        ## "In body" insertion mode, "plaintext" start tag.  As
        ## normal, but effectively ends parsing.
        ## has a p element in scope
        INSCOPE: for (reverse @{$self->{open_elements}}) {
          if ($_->[1] == P_EL) {
             
             
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # <plaintext>
            $token = {type => END_TAG_TOKEN, tag_name => 'p',
                      line => $token->{line}, column => $token->{column}};
            next B;
          } elsif ($_->[1] & BUTTON_SCOPING_EL) {
             
            last INSCOPE;
          }
        } # INSCOPE
           
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
        $self->{state} = PLAINTEXT_STATE;
           
         
        $token = $self->_get_next_token;
        next B;
         
      } elsif ($token->{tag_name} eq 'a') {
        AFE: for my $i (reverse 0..$#$active_formatting_elements) {
          my $node = $active_formatting_elements->[$i];
                         no warnings;
          if ($node->[1] == A_EL) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in a:a', token => $token);
             
             
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # <a>
            $token = {type => END_TAG_TOKEN, tag_name => 'a',
                      line => $token->{line}, column => $token->{column}};
            $formatting_end_tag->($self, $active_formatting_elements,
                                  $open_tables, $token);
             
            AFE2: for (reverse 0..$#$active_formatting_elements) {
              if ($active_formatting_elements->[$_]->[0] eq $node->[0]) {
                 
                splice @$active_formatting_elements, $_, 1;
                last AFE2;
              }
            } # AFE2
            OE: for (reverse 0..$#{$self->{open_elements}}) {
              if ($self->{open_elements}->[$_]->[0] eq $node->[0]) {
                 
                splice @{$self->{open_elements}}, $_, 1;
                last OE;
              }
            } # OE
            last AFE;
          } elsif ($node->[0] eq '#marker') {
             
            last AFE;
          }
        } # AFE
         
        my $insert = $self->{insertion_mode} & TABLE_IMS
            ? $insert_to_foster : $insert_to_current;          
        $reconstruct_active_formatting_elements
          ->($self, $insert, $active_formatting_elements, $open_tables);
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          if ($attr)
          {
            $attr->setValue($attr_t->{value});
            $self->_data($attr, manakai_source_line => $attr_t->{line});
            $self->_data($attr, manakai_source_column => $attr_t->{column});
            $el->setAttributeNodeNS($attr);
          }
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
        push @$active_formatting_elements, 
          [$self->{open_elements}->[-1]->[0],
          $self->{open_elements}->[-1]->[1],
          $token];
         
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'nobr') {
        my $insert = $self->{insertion_mode} & TABLE_IMS
            ? $insert_to_foster : $insert_to_current;
        $reconstruct_active_formatting_elements
          ->($self, $insert, $active_formatting_elements, $open_tables);
        ## has a |nobr| element in scope
        INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
          my $node = $self->{open_elements}->[$_];
          if ($node->[1] == NOBR_EL) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in nobr:nobr', token => $token);
             
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # <nobr>
            $token = {type => END_TAG_TOKEN, tag_name => 'nobr',
                      line => $token->{line}, column => $token->{column}};
            next B;
          } elsif ($node->[1] & SCOPING_EL) {
             
            last INSCOPE;
          }
        } # INSCOPE
         
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
        push @$active_formatting_elements, 
          [$self->{open_elements}->[-1]->[0],
          $self->{open_elements}->[-1]->[1],
          $token];        
         
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'button') {
        ## has a button element in scope
        INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
          my $node = $self->{open_elements}->[$_];
          if ($node->[1] == BUTTON_EL) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'in button:button', token => $token);
             
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # <button>
            $token = {type => END_TAG_TOKEN, tag_name => 'button',
                      line => $token->{line}, column => $token->{column}};
            next B;
          } elsif ($node->[1] & SCOPING_EL) {
             
            last INSCOPE;
          }
        } # INSCOPE
           
        my $insert = $self->{insertion_mode} & TABLE_IMS
            ? $insert_to_foster : $insert_to_current;
        $reconstruct_active_formatting_elements
          ->($self, $insert, $active_formatting_elements, $open_tables);
           
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
        ## TODO: associate with $self->{form_element} if defined
        delete $self->{frameset_ok};
         
        $token = $self->_get_next_token;
        next B;
      } elsif ({
                xmp => 1,
                iframe => 1,
                noembed => 1,
                noframes => 1, ## NOTE: This is an "as if in head" code clone.
                noscript => 0, ## TODO: 1 if scripting is enabled
               }->{$token->{tag_name}}) {
        if ($token->{tag_name} eq 'xmp') {
          ## "In body" insertion mode, "xmp" start tag.  As normal
          ## flow-content element start tag, but CDATA parsing.
           
  
          ## "have a |p| element in button scope".
          INSCOPE: for (reverse @{$self->{open_elements}}) {
            if ($_->[1] == P_EL) {
               
               
        $token->{self_closing} = $self->{self_closing};
        unshift @{$self->{token}}, $token;
        delete $self->{self_closing};
       # <xmp>
              $token = {type => END_TAG_TOKEN, tag_name => 'p',
                        line => $token->{line}, column => $token->{column}};
              next B;
            } elsif ($_->[1] & BUTTON_SCOPING_EL) {
               
              last INSCOPE;
            }
          } # INSCOPE
           
          my $insert = $self->{insertion_mode} & TABLE_IMS
              ? $insert_to_foster : $insert_to_current;
          $reconstruct_active_formatting_elements
            ->($self, $insert, $active_formatting_elements, $open_tables);
          delete $self->{frameset_ok};
        } elsif ($token->{tag_name} eq 'iframe') {
           
          delete $self->{frameset_ok};
        } else {
           
        }
        ## NOTE: There is an "as if in body" code clone.
        $parse_rcdata->($self, $insert, $open_tables, 0); # RAWTEXT
        next B;
      } elsif ($token->{tag_name} eq 'isindex') {
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'isindex', token => $token);
         
        if (defined $self->{form_element}) {
           
          ## Ignore the token
           ## NOTE: Not acknowledged.
          $token = $self->_get_next_token;
          next B;
        } else {
          delete $self->{self_closing};
          my $at = $token->{attributes};
          my $form_attrs;
          $form_attrs->{action} = $at->{action} if $at->{action};
          my $prompt_attr = $at->{prompt};
          $at->{name} = {name => 'name', value => 'isindex'};
          delete $at->{action};
          delete $at->{prompt};
          my @tokens = (
                        {type => START_TAG_TOKEN, tag_name => 'form',
                         attributes => $form_attrs,
                         line => $token->{line}, column => $token->{column}},
                        {type => START_TAG_TOKEN, tag_name => 'hr',
                         line => $token->{line}, column => $token->{column}},
                        {type => START_TAG_TOKEN, tag_name => 'label',
                         line => $token->{line}, column => $token->{column}},
                       );
          if ($prompt_attr) {
             
            push @tokens, {type => CHARACTER_TOKEN, data => $prompt_attr->{value},
                           #line => $token->{line}, column => $token->{column},
                          };
          } else {
             
            push @tokens, {type => CHARACTER_TOKEN,
                           data => 'This is a searchable index. Enter search keywords: ',
                           #line => $token->{line}, column => $token->{column},
                          }; # SHOULD
            ## TODO: make this configurable
          }
          push @tokens,
                        {type => START_TAG_TOKEN, tag_name => 'input', attributes => $at,
                         line => $token->{line}, column => $token->{column}},
                        #{type => CHARACTER_TOKEN, data => ''}, # SHOULD
                        {type => END_TAG_TOKEN, tag_name => 'label',
                         line => $token->{line}, column => $token->{column}},
                        {type => START_TAG_TOKEN, tag_name => 'hr',
                         line => $token->{line}, column => $token->{column}},
                        {type => END_TAG_TOKEN, tag_name => 'form',
                         line => $token->{line}, column => $token->{column}};
          unshift @{$self->{token}}, (@tokens);
          $token = $self->_get_next_token;
          next B;
        }
      } elsif ($token->{tag_name} eq 'textarea') {
        ## 1. Insert
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
         
        ## Step 2 # XXX
        ## TODO: $self->{form_element} if defined
        ## 2. Drop U+000A LINE FEED
        $self->{ignore_newline} = 1;
        ## 3. RCDATA
        $self->{state} = RCDATA_STATE;
        delete $self->{escape}; # MUST
        ## 4., 6. Insertion mode
        $self->{insertion_mode} |= IN_CDATA_RCDATA_IM;
        ## 5. Frameset-ng.
        delete $self->{frameset_ok};
         
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'optgroup' or
               $token->{tag_name} eq 'option') {
        if ($self->{open_elements}->[-1]->[1] == OPTION_EL) {
           
          ## NOTE: As if </option>
        
      $token->{self_closing} = $self->{self_closing};
      unshift @{$self->{token}}, $token;
      delete $self->{self_closing};
     # <option> or <optgroup>
          $token = {type => END_TAG_TOKEN, tag_name => 'option',
                    line => $token->{line}, column => $token->{column}};
          next B;
        }
        my $insert = $self->{insertion_mode} & TABLE_IMS
            ? $insert_to_foster : $insert_to_current;
        $reconstruct_active_formatting_elements
          ->($self, $insert, $active_formatting_elements, $open_tables);
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
         
        $token = $self->_get_next_token;
        redo B;
      } elsif ($token->{tag_name} eq 'rt' or
               $token->{tag_name} eq 'rp') {
        ## has a |ruby| element in scope
        INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
          my $node = $self->{open_elements}->[$_];
          if ($node->[1] == RUBY_EL) {
             
            ## generate implied end tags
            while ($self->{open_elements}->[-1]->[1] & END_TAG_OPTIONAL_EL) {
               
              pop @{$self->{open_elements}};
            }
            unless ($self->{open_elements}->[-1]->[1] == RUBY_EL) {
               
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                              text => $self->{open_elements}->[-1]->[0]
                                  ->tagName,
                              token => $token);
            }
            last INSCOPE;
          } elsif ($node->[1] & SCOPING_EL) {
             
            last INSCOPE;
          }
        } # INSCOPE
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
         
        $token = $self->_get_next_token;
        redo B;
      } elsif ($token->{tag_name} eq 'math' or
               $token->{tag_name} eq 'svg') {
        my $insert = $self->{insertion_mode} & TABLE_IMS
            ? $insert_to_foster : $insert_to_current;
        $reconstruct_active_formatting_elements
          ->($self, $insert, $active_formatting_elements, $open_tables);
        ## "Adjust MathML attributes" ('math' only) - done in insert-element-f
        ## "adjust SVG attributes" ('svg' only) - done in insert-element-f
        ## "adjust foreign attributes" - done in insert-element-f
         
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS
                        ($token->{tag_name} eq 'math' ? (MML_NS) : (SVG_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr;
                         if (defined $foreign_attr_xname->{ $attr_name })
                         {
                                 my $xmlnsuri = $foreign_attr_xname->{ $attr_name }->[0];
                                 my $qname = join ':', @{$foreign_attr_xname->{ $attr_name }->[1]};
                                 $qname =~ s/(^:)|(:$)//;
                                 $attr = $self->{document}->createAttributeNS($xmlnsuri, $qname);
                         }
                         elsif ($token->{tag_name} eq 'math' && $attr_name eq 'definitionurl')
                         {
                                 $attr = $self->{document}->createAttributeNS((MML_NS), 'definitionURL');
                         }
                         elsif ($token->{tag_name} eq 'math')
                         {
                                 $attr = $self->{document}->createAttributeNS((MML_NS), $attr_name);
                         }
                         elsif ($token->{tag_name} eq 'svg')
                         {
                                 $attr = $self->{document}->createAttributeNS(
                                        (SVG_NS), ($svg_attr_name->{$attr_name} || $attr_name));
                         }
                         unless ($attr)
                         {
                                $attr = $self->{document}->createAttribute($attr_name);
                                }
                        if ($attr)
                        {
                                 $attr->setValue($attr_t->{value});
                                 $self->_data($attr, manakai_source_line => $attr_t->{line});
                                 $self->_data($attr, manakai_source_column => $attr_t->{column});
                                 $el->setAttributeNodeNS ($attr);
                         }
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, ($el_category_f->{$token->{tag_name} eq 'math' ? MML_NS : SVG_NS}->{ $token->{tag_name}} || 0) | FOREIGN_EL | (($token->{tag_name} eq 'math' ? MML_NS : SVG_NS) eq SVG_NS ? SVG_EL : ($token->{tag_name} eq 'math' ? MML_NS : SVG_NS) eq MML_NS ? MML_EL : 0)];
      if ( $token->{attributes}->{xmlns} and  $token->{attributes}->{xmlns}->{value} ne ($token->{tag_name} eq 'math' ? (MML_NS) : (SVG_NS))) {
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'bad namespace', token =>  $token);
## TODO: Error type documentation
      }
      if ( $token->{attributes}->{'xmlns:xlink'} and
           $token->{attributes}->{'xmlns:xlink'}->{value} ne q<http://www.w3.org/1999/xlink>) {
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'bad namespace', token =>  $token);
      }
    }
   
         
        if ($self->{self_closing}) {
          pop @{$self->{open_elements}};
          delete $self->{self_closing};
        } else {
           
        }
        $token = $self->_get_next_token;
        next B;
      } elsif ({
                caption => 1, col => 1, colgroup => 1, frame => 1,
                head => 1,
                tbody => 1, td => 1, tfoot => 1, th => 1,
                thead => 1, tr => 1,
               }->{$token->{tag_name}}) {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'in body',
                        text => $token->{tag_name}, token => $token);
        ## Ignore the token
         ## NOTE: |<col/>| or |<frame/>| here is an error.
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'param' or
               $token->{tag_name} eq 'source' or
                                        $token->{tag_name} eq 'track') {
         
    {
      my $el;
       
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS(undef, $attr_name);
          $attr->setValue($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
        pop @{$self->{open_elements}};
        delete $self->{self_closing};
        $token = $self->_get_next_token;
        redo B;
      } else {
        if ($token->{tag_name} eq 'image') {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'image', token => $token);
          $token->{tag_name} = 'img';
        } else {
           
        }
        ## NOTE: There is an "as if <br>" code clone.
        my $insert = $self->{insertion_mode} & TABLE_IMS
            ? $insert_to_foster : $insert_to_current;
        $reconstruct_active_formatting_elements
          ->($self, $insert, $active_formatting_elements, $open_tables);
         
         
    {
      my $el;
        $token->{tag_name} =~ s/[^A-Za-z0-9:_-]//g;
      $el = $self->{document}->createElementNS((HTML_NS), $token->{tag_name});
     
        ATR: for my $attr_name (keys %{  $token->{attributes}}) {
          my $attr_t =   $token->{attributes}->{$attr_name};
          my $attr = $self->{document}->createAttributeNS (undef, $attr_name);
                         next ATR unless ref($attr);
          $attr->setValue ($attr_t->{value});
          $self->_data($attr, manakai_source_line => $attr_t->{line});
          $self->_data($attr, manakai_source_column => $attr_t->{column});
          $el->setAttributeNodeNS ($attr);
        }
       
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
      $insert->($self, $el, $open_tables);
      push @{$self->{open_elements}}, [$el, $el_category->{$token->{tag_name}} || 0];
    }
   
        if ({
             applet => 1, marquee => 1, object => 1,
            }->{$token->{tag_name}}) {
           
          push @$active_formatting_elements, ['#marker', '', undef];
          delete $self->{frameset_ok};
           
        } elsif ({
                  b => 1, big => 1, code=>1, em => 1, font => 1, i => 1,
                  s => 1, small => 1, strike => 1,
                  strong => 1, tt => 1, u => 1,
                 }->{$token->{tag_name}}) {
           
        push @$active_formatting_elements, 
          [$self->{open_elements}->[-1]->[0],
          $self->{open_elements}->[-1]->[1],
          $token];
           
        } elsif ($token->{tag_name} eq 'input') {
           
          ## TODO: associate with $self->{form_element} if defined
                          
          pop @{$self->{open_elements}};
                          
          if ($token->{attributes}->{type}) {
            my $type = $token->{attributes}->{type}->{value};
            $type =~ tr/A-Z/a-z/; ## ASCII case-insensitive.
            if ($type eq 'hidden') {
              #
            } else {
              delete $self->{frameset_ok};
            }
          } else {
            delete $self->{frameset_ok};
          }
                          
          delete $self->{self_closing};
        } elsif ({
          area => 1, br => 1, embed => 1, img => 1, wbr => 1, keygen => 1,
        }->{$token->{tag_name}}) {
           
          pop @{$self->{open_elements}};
          delete $self->{frameset_ok};
          delete $self->{self_closing};
        } elsif ($token->{tag_name} eq 'select') {
          ## TODO: associate with $self->{form_element} if defined
          delete $self->{frameset_ok};
           
          if ($self->{insertion_mode} & TABLE_IMS or
              $self->{insertion_mode} & BODY_TABLE_IMS) {
            $self->{insertion_mode} = IN_SELECT_IN_TABLE_IM;
          } else {
             
            $self->{insertion_mode} = IN_SELECT_IM;
          }
           
        } else {
           
        }
         
        $token = $self->_get_next_token;
        next B;
      }
    } elsif ($token->{type} == END_TAG_TOKEN) {
      if ($token->{tag_name} eq 'body' or $token->{tag_name} eq 'html') {
        ## 1. If not "have an element in scope":
        ## "has a |body| element in scope"
        my $i;
        INSCOPE: {
          for (reverse @{$self->{open_elements}}) {
            if ($_->[1] == BODY_EL) {
               
              $i = $_;
              last INSCOPE;
            } elsif ($_->[1] & SCOPING_EL) {
               
              last;
            }
          }
          ## NOTE: |<marquee></body>|, |<svg><foreignobject></body>|,
          ## and fragment cases.
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                          text => $token->{tag_name}, token => $token);
          ## Ignore the token.  (</body> or </html>)
          $token = $self->_get_next_token;
          next B;
        } # INSCOPE
        ## 2. If unclosed elements:
        for (@{$self->{open_elements}}) {
          unless ($_->[1] & ALL_END_TAG_OPTIONAL_EL ||
                  $_->[1] == OPTGROUP_EL ||
                  $_->[1] == OPTION_EL ||
                  $_->[1] == RUBY_COMPONENT_EL) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                            text => $_->[0]->tagName,
                            token => $token);
            last;
          } else {
             
          }
        }
        ## 3. Switch the insertion mode.
        $self->{insertion_mode} = AFTER_BODY_IM;
        if ($token->{tag_name} eq 'body') {
          $token = $self->_get_next_token;
        } else { # html
          ## Reprocess.
        }
        next B;
      } elsif ({
        ## "In body" insertion mode, end tags for non-phrasing flow
        ## content elements.
         
                address => 1, article => 1, aside => 1, blockquote => 1,
                center => 1, 
                #datagrid => 1, 
                details => 1, 
                dir => 1, div => 1, dl => 1, fieldset => 1, figure => 1,
                footer => 1, header => 1, hgroup => 1,
                listing => 1, menu => 1, nav => 1,
                ol => 1, pre => 1, section => 1, ul => 1,
                figcaption => 1, summary => 1,
                ## NOTE: As normal, but ... optional tags
                dd => 1, dt => 1, li => 1,
                applet => 1, button => 1, marquee => 1, object => 1,
               }->{$token->{tag_name}}) {
        ## NOTE: Code for <li> start tags includes "as if </li>" code.
        ## Code for <dt> or <dd> start tags includes "as if </dt> or
        ## </dd>" code.
        ## has an element in scope
        my $i;
        INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
          my $node = $self->{open_elements}->[$_];
          if ($node->[0]->tagName eq $token->{tag_name}) {
             
            $i = $_;
            last INSCOPE;
          } elsif ($node->[1] & SCOPING_EL) {
             
            last INSCOPE;
          }
          elsif ($token->{tag_name} eq 'li' and
                   {ul => 1, ol => 1}->{$node->[0]->localname}) {
            ## Has an element in list item scope
             
            last INSCOPE;
           }
        } # INSCOPE
        unless (defined $i) { # has an element in scope
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                          text => $token->{tag_name}, token => $token);
          ## NOTE: Ignore the token.
        } else {
          ## Step 1. generate implied end tags
          while ({
                  ## END_TAG_OPTIONAL_EL
                  dd => ($token->{tag_name} ne 'dd'),
                  dt => ($token->{tag_name} ne 'dt'),
                  li => ($token->{tag_name} ne 'li'),
                  option => 1,
                  optgroup => 1,
                  p => 1,
                  rt => 1,
                  rp => 1,
                 }->{$self->{open_elements}->[-1]->[0]->tagName}) {
             
            pop @{$self->{open_elements}};
          }
          ## Step 2.
          if ($self->{open_elements}->[-1]->[0]->tagName
                  ne $token->{tag_name}) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                            text => $self->{open_elements}->[-1]->[0]
                                ->tagName,
                            token => $token);
          } else {
             
          }
          ## Step 3.
          splice @{$self->{open_elements}}, $i;
          ## Step 4.
          $clear_up_to_marker->($active_formatting_elements)
              if {
                applet => 1, marquee => 1, object => 1,
              }->{$token->{tag_name}};
        }
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'form') {
        ## NOTE: As normal, but interacts with the form element pointer
        undef $self->{form_element};
        ## has an element in scope
        my $i;
        INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
          my $node = $self->{open_elements}->[$_];
          if ($node->[1] == FORM_EL) {
             
            $i = $_;
            last INSCOPE;
          } elsif ($node->[1] & SCOPING_EL) {
             
            last INSCOPE;
          }
        } # INSCOPE
        unless (defined $i) { # has an element in scope
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                          text => $token->{tag_name}, token => $token);
          ## NOTE: Ignore the token.
        } else {
          ## Step 1. generate implied end tags
          while ($self->{open_elements}->[-1]->[1] & END_TAG_OPTIONAL_EL) {
             
            pop @{$self->{open_elements}};
          }
           
          ## Step 2. 
          if ($self->{open_elements}->[-1]->[0]->tagName
                  ne $token->{tag_name}) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                            text => $self->{open_elements}->[-1]->[0]
                                ->tagName,
                            token => $token);
          } else {
             
          }  
           
          ## Step 3.
          splice @{$self->{open_elements}}, $i;
        }
        $token = $self->_get_next_token;
        next B;
      } elsif ({
                ## NOTE: As normal, except acts as a closer for any ...
                h1 => 1, h2 => 1, h3 => 1, h4 => 1, h5 => 1, h6 => 1,
               }->{$token->{tag_name}}) {
        ## has an element in scope
        my $i;
        INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
          my $node = $self->{open_elements}->[$_];
          if ($node->[1] == HEADING_EL) {
             
            $i = $_;
            last INSCOPE;
          } elsif ($node->[1] & SCOPING_EL) {
             
            last INSCOPE;
          }
        } # INSCOPE
        unless (defined $i) { # has an element in scope
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                          text => $token->{tag_name}, token => $token);
          ## NOTE: Ignore the token.
        } else {
          ## Step 1. generate implied end tags
          while ($self->{open_elements}->[-1]->[1] & END_TAG_OPTIONAL_EL) {
             
            pop @{$self->{open_elements}};
          }
           
          ## Step 2.
          if ($self->{open_elements}->[-1]->[0]->tagName
                  ne $token->{tag_name}) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                            text => $token->{tag_name}, token => $token);
          } else {
             
          }
          ## Step 3.
          splice @{$self->{open_elements}}, $i;
        }
         
        $token = $self->_get_next_token;
        next B;
      } elsif ($token->{tag_name} eq 'p') {
        ## "In body" insertion mode, "p" start tag. As normal, except
        ## </p> implies <p> and ...
  
        ## "have an element in button scope".
        my $non_optional;
        my $i;
        INSCOPE: for (reverse 0..$#{$self->{open_elements}}) {
          my $node = $self->{open_elements}->[$_];
          if ($node->[1] == P_EL) {
             
            $i = $_;
            last INSCOPE;
          } elsif ($node->[1] & BUTTON_SCOPING_EL) {
             
            last INSCOPE;
          } elsif ($node->[1] & END_TAG_OPTIONAL_EL) {
            ## NOTE: |END_TAG_OPTIONAL_EL| includes "p"
             
            #
          } else {
             
            $non_optional ||= $node;
            #
          }
        } # INSCOPE
        if (defined $i) {
          ## 1. Generate implied end tags
          #
          ## 2. If current node != "p", parse error
          if ($non_optional) {
             
            $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                            text => $non_optional->[0]->tagName,
                            token => $token);
          } else {
             
          }
          ## 3. Pop
          splice @{$self->{open_elements}}, $i;
        } else {
           
          $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                          text => $token->{tag_name}, token => $token);
           
          ## As if <p>, then reprocess the current token
          my $el;
           
      $el = $self->{document}->createElementNS((HTML_NS), 'p');
     
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
        $self->_data($el, implied => __LINE__);
       
          $insert->($self, $el, $open_tables);
          ## NOTE: Not inserted into |$self->{open_elements}|.
        }
        $token = $self->_get_next_token;
        next B;
      } elsif ({
                a => 1,
                b => 1, big => 1, code=>1, em => 1, font => 1, i => 1,
                nobr => 1, s => 1, small => 1, strike => 1,
                strong => 1, tt => 1, u => 1,
               }->{$token->{tag_name}}) {
         
        $formatting_end_tag->($self, $active_formatting_elements,
                              $open_tables, $token);
        next B;
      } elsif ($token->{tag_name} eq 'br') {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                        text => 'br', token => $token);
        ## As if <br>
        my $insert = $self->{insertion_mode} & TABLE_IMS
            ? $insert_to_foster : $insert_to_current;
        $reconstruct_active_formatting_elements
          ->($self, $insert, $active_formatting_elements, $open_tables);
         
        my $el;        
      $el = $self->{document}->createElementNS((HTML_NS), 'br');
     
        $self->_data($el, manakai_source_line => $token->{line})
            if defined $token->{line};
        $self->_data($el, manakai_source_column => $token->{column})
            if defined $token->{column};
       
        $insert->($self, $el, $open_tables);
         
        ## Ignore the token.
        $token = $self->_get_next_token;
        next B;
      } else {
        if ($token->{tag_name} eq 'sarcasm') {
          sleep 0.001; # take a deep breath
        }
        ## Step 1
        my $node_i = -1;
        my $node = $self->{open_elements}->[$node_i];
        ## Step 2
        LOOP: {
          my $node_tag_name = $node->[0]->tagName;
          $node_tag_name =~ tr/A-Z/a-z/; # for SVG camelCase tag names
          if ($node_tag_name eq $token->{tag_name}) {
            ## Step 1
            ## generate implied end tags
            while ($self->{open_elements}->[-1]->[1] & END_TAG_OPTIONAL_EL and
                   $self->{open_elements}->[-1]->[0]->localname
                       ne $token->{tag_name}) {
                          
              ## NOTE: |<ruby><rt></ruby>|.
              pop @{$self->{open_elements}};
              $node_i++;
            }
         
            ## Step 2
            my $current_tag_name
                = $self->{open_elements}->[-1]->[0]->tagName;
            $current_tag_name =~ tr/A-Z/a-z/;
            if ($current_tag_name ne $token->{tag_name}) {
               
              ## NOTE: <x><y></x>
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'not closed',
                              text => $self->{open_elements}->[-1]->[0]
                                  ->tagName,
                              token => $token);
            } else {
               
            }
             
            ## Step 3
            splice @{$self->{open_elements}}, $node_i if $node_i < 0;
            $token = $self->_get_next_token;
            last LOOP;
          } else {
            ## Step 3
            if ($node->[1] & SPECIAL_EL or $node->[1] & SCOPING_EL) { ## "Special"
               
              $self->{parse_error}->(level => $self->{level}->{must}, type => 'unmatched end tag',
                              text => $token->{tag_name}, token => $token);
              ## Ignore the token
              $token = $self->_get_next_token;
              last LOOP;
              ## NOTE: |<span><dd></span>a|: In Safari 3.1.2 and Opera
              ## 9.27, "a" is a child of <dd> (conforming).  In
              ## Firefox 3.0.2, "a" is a child of <body>.  In WinIE 7,
              ## "a" is a child of both <body> and <dd>.
            }
             
             
          }
           
          ## Step 4
          $node_i--;
          $node = $self->{open_elements}->[$node_i];
           
          ## Step 5;
          redo LOOP;
        } # LOOP
        next B;
      }
    }
    next B;
  } # B
  ## Stop parsing # MUST
   
  ## TODO: script stuffs
} # _tree_construct_main
## XXX: How this method is organized is somewhat out of date, although
## it still does what the current spec documents.
sub set_inner_html ($$$$;$) {
  my ($class, $self);
  if (ref $_[0]) {
    $self = shift;
    $class = ref $self;
  } else {
    $class = shift;
    $self = $class->new;
  }
  my $node = shift; # /context/
  #my $s = \$_[0];
  my $onerror = $_[1];
  my $get_wrapper = $_[2] || sub ($) { return $_[0] };
  my $nt = $node->node_type; #TOBY-TODO
  if ($nt == 9) { # Document (invoke the algorithm with no /context/ element)
    # MUST
     
    ## Step 1 # MUST
    ## TODO: If the document has an active parser, ...
    ## ISSUE: There is an issue in the spec.
     
    ## Step 2 # MUST
    my @cn = $node->childNodes;
    for (@cn) {
      $node->removeChild ($_);
    }
    ## Step 3, 4, 5 # MUST
    $self->parse_char_string ($_[0] => $node, $onerror, $get_wrapper);
  } elsif ($nt == 1) { # Element (invoke the algorithm with /context/ element)
    ## TODO: If non-html element
    ## NOTE: Most of this code is copied from |parse_string|
## TODO: Support for $get_wrapper
#TOBY-TODO
    ## F1. Create an HTML document.
    my $this_doc = $node->ownerDocument;
         my $implementation = ref($this_doc);
         my $doc = $implementation->createDocument;
    $self->_data($doc, manakai_is_html => 1);
    ## F2. Propagate quirkness flag
    my $node_doc = $node->ownerDocument;
    $self->_data($doc)->{'manakai_compat_mode'} = $self->_data($node_doc, 'manakai_compat_mode');
    ## F3. Create an HTML parser
    my $p = $self;
    $p->{document} = $doc;
    ## Step 8 # MUST
    my $i = 0;
    $p->{line_prev} = $p->{line} = 1;
    $p->{column_prev} = $p->{column} = 0;
    require HTML::HTML5::Parser::Charset::DecodeHandle;
    my $input = HTML::HTML5::Parser::Charset::DecodeHandle::CharString->new (\($_[0]));
    $input = $get_wrapper->($input);
    $p->{set_nc} = sub {
      my $self = shift;
      my $char = '';
      if (defined $self->{next_nc}) {
        $char = $self->{next_nc};
        delete $self->{next_nc};
        $self->{nc} = ord $char;
      } else {
        $self->{char_buffer} = '';
        $self->{char_buffer_pos} = 0;
         
        my $count = $input->manakai_read_until
            ($self->{char_buffer}, qr/[^\x00\x0A\x0D\x{D800}-\x{DFFF}]/,
             $self->{char_buffer_pos});
        if ($count) {
          $self->{line_prev} = $self->{line};
          $self->{column_prev} = $self->{column};
          $self->{column}++;
          $self->{nc}
              = ord substr ($self->{char_buffer},
                            $self->{char_buffer_pos}++, 1);
          return;
        }
         
        if ($input->read ($char, 1)) {
          $self->{nc} = ord $char;
        } else {
          $self->{nc} = -1;
          return;
        }
      }
      ($p->{line_prev}, $p->{column_prev}) = ($p->{line}, $p->{column});
      $p->{column}++;
      if ($self->{nc} == 0x000A) { # LF
        $p->{line}++;
        $p->{column} = 0;
         
      } elsif ($self->{nc} == 0x000D) { # CR
## TODO: support for abort/streaming
        my $next = '';
        if ($input->read ($next, 1) and $next ne "\x0A") {
          $self->{next_nc} = $next;
        }
        $self->{nc} = 0x000A; # LF # MUST
        $p->{line}++;
        $p->{column} = 0;
         
      } elsif (0xD800 <= $self->{nc} and $self->{nc} <= 0xDFFF) {
         
        $self->{parse_error}->(level => $self->{level}->{must}, type => 'surrogate'); ## XXX documentation
        $self->{nc} = 0xFFFD; # REPLACEMENT CHARACTER # MUST
       }
    };
    $p->{read_until} = sub {
      #my ($scalar, $specials_range, $offset) = @_;
      return 0 if defined $p->{next_nc};
      my $pattern = qr/[^$_[1]\x00\x0A\x0D\x{D800}-\x{DFFF}]/;
      my $offset = $_[2] || 0;
       
      if ($p->{char_buffer_pos} < length $p->{char_buffer}) {
        pos ($p->{char_buffer}) = $p->{char_buffer_pos};
        if ($p->{char_buffer} =~ /\G(?>$pattern)+/) {
          substr ($_[0], $offset)
              = substr ($p->{char_buffer}, $-[0], $+[0] - $-[0]);
          my $count = $+[0] - $-[0];
          if ($count) {
            $p->{column} += $count;
            $p->{char_buffer_pos} += $count;
            $p->{line_prev} = $p->{line};
            $p->{column_prev} = $p->{column} - 1;
            $p->{nc} = -1;
          }
          return $count;
        } else {
          return 0;
        }
      } else {
        my $count = $input->manakai_read_until ($_[0], $pattern, $_[2]);
        if ($count) {
          $p->{column} += $count;
          $p->{column_prev} += $count;
          $p->{nc} = -1;
        }
        return $count;
      }
    }; # $p->{read_until}
    my $ponerror = $onerror || sub {
      my (%opt) = @_;
      my $line = $opt{line};
      my $column = $opt{column};
      if (defined $opt{token} and defined $opt{token}->{line}) {
        $line = $opt{token}->{line};
        $column = $opt{token}->{column};
      }
      warn "Parse error ($opt{type}) at line $line column $column\n";
    };
    $p->{parse_error} = sub {
      $ponerror->(line => $p->{line}, column => $p->{column}, @_);
    };
     
    my $char_onerror = sub {
      my (undef, $type, %opt) = @_;
      $ponerror->(layer => 'encode',
                  line => $p->{line}, column => $p->{column} + 1,
                  %opt, type => $type);
    }; # $char_onerror
    $input->onerror ($char_onerror);
    $p->_initialize_tokenizer;
    $p->_initialize_tree_constructor;
    ## F4. If /context/ is not undef...
    ## F4.1. content model flag
    my $node_ns = $node->namespaceURI || '';
    my $node_ln = $node->localname;
    if ($node_ns eq HTML_NS) {
      if ($node_ln eq 'title' or $node_ln eq 'textarea') {
        $p->{state} = RCDATA_STATE;
      } elsif ($node_ln eq 'script') {
        $p->{state} = SCRIPT_DATA_STATE;
      } elsif ({
        style => 1,
        script => 1,
        xmp => 1,
        iframe => 1,
        noembed => 1,
        noframes => 1,
        noscript => 1,
      }->{$node_ln}) {
        $p->{state} = RAWTEXT_STATE;
      } elsif ($node_ln eq 'plaintext') {
        $p->{state} = PLAINTEXT_STATE;
      }
       
      $p->{inner_html_node} = [$node, $el_category->{$node_ln}];
    } elsif ($node_ns eq SVG_NS) {
      $p->{inner_html_node} = [$node,
                               $el_category_f->{$node_ns}->{$node_ln}
                                   || FOREIGN_EL | SVG_EL];
    } elsif ($node_ns eq MML_NS) {
      $p->{inner_html_node} = [$node,
                               $el_category_f->{$node_ns}->{$node_ln}
                                   || FOREIGN_EL | MML_EL];
    } else {
      $p->{inner_html_node} = [$node, FOREIGN_EL];
    }
   
    ## F4.2. Root |html| element
    my $root = $doc->createElementNS('http://www.w3.org/1999/xhtml', 'html');
    ## F4.3.
    $doc->appendChild ($root);
    ## F4.4.
    push @{$p->{open_elements}}, [$root, $el_category->{html}];
    undef $p->{head_element};
    ## F4.5.
    $p->_reset_insertion_mode;
    ## F4.6.
    my $anode = $node;
    AN: while (defined $anode) {
      if ($anode->node_type == 1) {
        my $nsuri = $anode->namespaceURI;
        if (defined $nsuri and $nsuri eq 'http://www.w3.org/1999/xhtml') {
          if ($anode->tagName eq 'form') {
             
            $p->{form_element} = $anode;
            last AN;
          }
        }
      }
      $anode = $anode->parentNode;
    } # AN
    ## F.5. Set the input stream.
    $p->{confident} = 1; ## Confident: irrelevant.
    ## F.6. Start the parser.
    {
      my $self = $p;
      $token = $self->_get_next_token;
    }
    $p->_tree_construction_main;
    ## F.7.
    my @cn = $node->childNodes;
    for (@cn) {
      $node->removeChild ($_);
    }
    ## ISSUE: mutation events? read-only?
    ## Step 11 # MUST
    @cn = $root->childNodes;
    for (@cn) {
      $this_doc->adoptNode ($_);
      $node->appendChild ($_);
    }
    ## ISSUE: mutation events?
    $p->_terminate_tree_constructor;
    ## Remove self references. 
    delete $p->{set_nc}; 
    delete $p->{read_until}; 
    delete $p->{parse_error}; 
  } else {
    die "$0: |set_inner_html| is not defined for node of type $nt";
  }
} # set_inner_html
} # tree construction stage
package HTML::HTML5::Parser::TagSoupParser::RestartParser;
sub new
{
  my ($class, %opts) = @_;
  bless \%opts => $class;
}
sub throw
{
  my ($class, %opts) = @_;
  die $class->new(%opts);
}
1;
# $Date: 2009/09/06 23:32:06 $