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Edit File : Parser.pm \| Size : 7.67 KB
# $Id$ # # This is free software, you may use it and distribute it under the same terms as # Perl itself. # # Copyright 2001-2003 AxKit.com Ltd., 2002-2006 Christian Glahn, 2006-2009 Petr Pajas # # package XML::LibXML::SAX::Parser; use strict; use warnings; use vars qw($VERSION @ISA); use XML::LibXML; use XML::LibXML::Common qw(:libxml); use XML::SAX::Base; use XML::SAX::DocumentLocator; $VERSION = "2.0210"; # VERSION TEMPLATE: DO NOT CHANGE @ISA = ('XML::SAX::Base'); sub CLONE_SKIP { return $XML::LibXML::__threads_shared ? 0 : 1; } sub _parse_characterstream { my ($self, $fh, $options) = @_; die "parsing a characterstream is not supported at this time"; } sub _parse_bytestream { my ($self, $fh, $options) = @_; my $parser = XML::LibXML->new(); my $doc = exists($options->{Source}{SystemId}) ? $parser->parse_fh($fh, $options->{Source}{SystemId}) : $parser->parse_fh($fh); $self->generate($doc); } sub _parse_string { my ($self, $str, $options) = @_; my $parser = XML::LibXML->new(); my $doc = exists($options->{Source}{SystemId}) ? $parser->parse_string($str, $options->{Source}{SystemId}) : $parser->parse_string($str); $self->generate($doc); } sub _parse_systemid { my ($self, $sysid, $options) = @_; my $parser = XML::LibXML->new(); my $doc = $parser->parse_file($sysid); $self->generate($doc); } sub generate { my $self = shift; my ($node) = @_; my $doc = $node->ownerDocument(); { # precompute some DocumentLocator values my %locator = ( PublicId => undef, SystemId => undef, Encoding => undef, XMLVersion => undef, ); my $dtd = defined $doc ? $doc->externalSubset() : undef; if (defined $dtd) { $locator{PublicId} = $dtd->publicId(); $locator{SystemId} = $dtd->systemId(); } if (defined $doc) { $locator{Encoding} = $doc->encoding(); $locator{XMLVersion} = $doc->version(); } $self->set_document_locator( XML::SAX::DocumentLocator->new( sub { $locator{PublicId} }, sub { $locator{SystemId} }, sub { defined($self->{current_node}) ? $self->{current_node}->line_number() : undef }, sub { 1 }, sub { $locator{Encoding} }, sub { $locator{XMLVersion} }, ), ); } if ( $node->nodeType() == XML_DOCUMENT_NODE \|\| $node->nodeType == XML_HTML_DOCUMENT_NODE ) { $self->start_document({}); $self->xml_decl({Version => $node->getVersion, Encoding => $node->getEncoding}); $self->process_node($node); $self->end_document({}); } } sub process_node { my ($self, $node) = @_; local $self->{current_node} = $node; my $node_type = $node->nodeType(); if ($node_type == XML_COMMENT_NODE) { $self->comment( { Data => $node->getData } ); } elsif ($node_type == XML_TEXT_NODE \|\| $node_type == XML_CDATA_SECTION_NODE) { # warn($node->getData . "\n"); $self->characters( { Data => $node->nodeValue } ); } elsif ($node_type == XML_ELEMENT_NODE) { # warn("<" . $node->getName . ">\n"); $self->process_element($node); # warn("</" . $node->getName . ">\n"); } elsif ($node_type == XML_ENTITY_REF_NODE) { foreach my $kid ($node->childNodes) { # warn("child of entity ref: " . $kid->getType() . " called: " . $kid->getName . "\n"); $self->process_node($kid); } } elsif ($node_type == XML_DOCUMENT_NODE \|\| $node_type == XML_HTML_DOCUMENT_NODE \|\| $node_type == XML_DOCUMENT_FRAG_NODE) { # sometimes it is just useful to generate SAX events from # a document fragment (very good with filters). foreach my $kid ($node->childNodes) { $self->process_node($kid); } } elsif ($node_type == XML_PI_NODE) { $self->processing_instruction( { Target => $node->getName, Data => $node->getData } ); } elsif ($node_type == XML_COMMENT_NODE) { $self->comment( { Data => $node->getData } ); } elsif ( $node_type == XML_XINCLUDE_START \|\| $node_type == XML_XINCLUDE_END ) { # ignore! # i may want to handle this one day, dunno yet } elsif ($node_type == XML_DTD_NODE ) { # ignore! # i will support DTDs, but had no time yet. } else { # warn("unsupported node type: $node_type"); } } sub process_element { my ($self, $element) = @_; my $attribs = {}; my @ns_maps = $element->getNamespaces; foreach my $ns (@ns_maps) { $self->start_prefix_mapping( { NamespaceURI => $ns->href, Prefix => ( defined $ns->localname ? $ns->localname : ''), } ); } foreach my $attr ($element->attributes) { my $key; # warn("Attr: $attr -> ", $attr->getName, " = ", $attr->getData, "\n"); # this isa dump thing... if ($attr->isa('XML::LibXML::Namespace')) { # TODO This needs fixing modulo agreeing on what # is the right thing to do here. unless ( defined $attr->name ) { ## It's an atter like "xmlns='foo'" $attribs->{"{}xmlns"} = { Name => "xmlns", LocalName => "xmlns", Prefix => "", Value => $attr->href, NamespaceURI => "", }; } else { my $prefix = "xmlns"; my $localname = $attr->localname; my $key = "{http://www.w3.org/2000/xmlns/}"; my $name = "xmlns"; if ( defined $localname ) { $key .= $localname; $name.= ":".$localname; } $attribs->{$key} = { Name => $name, Value => $attr->href, NamespaceURI => "http://www.w3.org/2000/xmlns/", Prefix => $prefix, LocalName => $localname, }; } } else { my $ns = $attr->namespaceURI; $ns = '' unless defined $ns; $key = "{$ns}".$attr->localname; ## Not sure why, but $attr->name is coming through stripped ## of its prefix, so we need to hand-assemble a real name. my $name = $attr->name; $name = "" unless defined $name; my $prefix = $attr->prefix; $prefix = "" unless defined $prefix; $name = "$prefix:$name" if index( $name, ":" ) < 0 && length $prefix; $attribs->{$key} = { Name => $name, Value => $attr->value, NamespaceURI => $ns, Prefix => $prefix, LocalName => $attr->localname, }; } # use Data::Dumper; # warn("Attr made: ", Dumper($attribs->{$key}), "\n"); } my $node = { Name => $element->nodeName, Attributes => $attribs, NamespaceURI => $element->namespaceURI, Prefix => $element->prefix \|\| "", LocalName => $element->localname, }; $self->start_element($node); foreach my $child ($element->childNodes) { $self->process_node($child); } my $end_node = { %$node }; delete $end_node->{Attributes}; $self->end_element($end_node); foreach my $ns (@ns_maps) { $self->end_prefix_mapping( { NamespaceURI => $ns->href, Prefix => ( defined $ns->localname ? $ns->localname : ''), } ); } } 1; __END__ Back

Edit File : Parser.pm | Size : 7.67 KB

# $Id$
#
# This is free software, you may use it and distribute it under the same terms as
# Perl itself.
#
# Copyright 2001-2003 AxKit.com Ltd., 2002-2006 Christian Glahn, 2006-2009 Petr Pajas
#
#

package XML::LibXML::SAX::Parser;

use strict;
use warnings;
use vars qw($VERSION @ISA);

use XML::LibXML;
use XML::LibXML::Common qw(:libxml);
use XML::SAX::Base;
use XML::SAX::DocumentLocator;

$VERSION = "2.0210"; # VERSION TEMPLATE: DO NOT CHANGE
@ISA = ('XML::SAX::Base');

sub CLONE_SKIP {
  return $XML::LibXML::__threads_shared ? 0 : 1;
}

sub _parse_characterstream {
    my ($self, $fh, $options) = @_;
    die "parsing a characterstream is not supported at this time";
}

sub _parse_bytestream {
    my ($self, $fh, $options) = @_;
    my $parser = XML::LibXML->new();
    my $doc = exists($options->{Source}{SystemId}) ? $parser->parse_fh($fh, $options->{Source}{SystemId}) : $parser->parse_fh($fh);
    $self->generate($doc);
}

sub _parse_string {
    my ($self, $str, $options) = @_;
    my $parser = XML::LibXML->new();
    my $doc = exists($options->{Source}{SystemId}) ? $parser->parse_string($str, $options->{Source}{SystemId}) : $parser->parse_string($str);
    $self->generate($doc);
}

sub _parse_systemid {
    my ($self, $sysid, $options) = @_;
    my $parser = XML::LibXML->new();
    my $doc = $parser->parse_file($sysid);
    $self->generate($doc);
}

sub generate {
    my $self = shift;
    my ($node) = @_;

my $doc = $node->ownerDocument();
    {
      # precompute some DocumentLocator values
      my %locator = (
	PublicId => undef,
	SystemId => undef,
	Encoding => undef,
	XMLVersion => undef,
       );
      my $dtd = defined $doc ? $doc->externalSubset() : undef;
      if (defined $dtd) {
	$locator{PublicId} = $dtd->publicId();
	$locator{SystemId} = $dtd->systemId();
      }
      if (defined $doc) {
	$locator{Encoding} = $doc->encoding();
	$locator{XMLVersion} = $doc->version();
      }
      $self->set_document_locator(
	XML::SAX::DocumentLocator->new(
	  sub { $locator{PublicId} },
	  sub { $locator{SystemId} },
	  sub { defined($self->{current_node}) ? $self->{current_node}->line_number() : undef },
	  sub { 1 },
	  sub { $locator{Encoding} },
	  sub { $locator{XMLVersion} },
	 ),
       );
    }

if ( $node->nodeType() == XML_DOCUMENT_NODE
         || $node->nodeType == XML_HTML_DOCUMENT_NODE ) {
        $self->start_document({});
        $self->xml_decl({Version => $node->getVersion, Encoding => $node->getEncoding});
        $self->process_node($node);
        $self->end_document({});
    }
}

sub process_node {
    my ($self, $node) = @_;

local $self->{current_node} = $node;

my $node_type = $node->nodeType();
    if ($node_type == XML_COMMENT_NODE) {
        $self->comment( { Data => $node->getData } );
    }
    elsif ($node_type == XML_TEXT_NODE
           || $node_type == XML_CDATA_SECTION_NODE) {
        # warn($node->getData . "\n");
        $self->characters( { Data => $node->nodeValue } );
    }
    elsif ($node_type == XML_ELEMENT_NODE) {
        # warn("<" . $node->getName . ">\n");
        $self->process_element($node);
        # warn("</" . $node->getName . ">\n");
    }
    elsif ($node_type == XML_ENTITY_REF_NODE) {
        foreach my $kid ($node->childNodes) {
            # warn("child of entity ref: " . $kid->getType() . " called: " . $kid->getName . "\n");
            $self->process_node($kid);
        }
    }
    elsif ($node_type == XML_DOCUMENT_NODE
           || $node_type == XML_HTML_DOCUMENT_NODE
           || $node_type == XML_DOCUMENT_FRAG_NODE) {
        # sometimes it is just useful to generate SAX events from
        # a document fragment (very good with filters).
        foreach my $kid ($node->childNodes) {
            $self->process_node($kid);
        }
    }
    elsif ($node_type == XML_PI_NODE) {
        $self->processing_instruction( { Target =>  $node->getName, Data => $node->getData } );
    }
    elsif ($node_type == XML_COMMENT_NODE) {
        $self->comment( { Data => $node->getData } );
    }
    elsif ( $node_type == XML_XINCLUDE_START
            || $node_type == XML_XINCLUDE_END ) {
        # ignore!
        # i may want to handle this one day, dunno yet
    }
    elsif ($node_type == XML_DTD_NODE ) {
        # ignore!
        # i will support DTDs, but had no time yet.
    }
    else {
        # warn("unsupported node type: $node_type");
    }

}

sub process_element {
    my ($self, $element) = @_;

my $attribs = {};
    my @ns_maps = $element->getNamespaces;

foreach my $ns (@ns_maps) {
        $self->start_prefix_mapping(
            {
                NamespaceURI => $ns->href,
                Prefix       => ( defined $ns->localname  ? $ns->localname : ''),
            }
        );
    }

foreach my $attr ($element->attributes) {
        my $key;
        # warn("Attr: $attr -> ", $attr->getName, " = ", $attr->getData, "\n");
        # this isa dump thing...
        if ($attr->isa('XML::LibXML::Namespace')) {
            # TODO This needs fixing modulo agreeing on what
            # is the right thing to do here.
            unless ( defined $attr->name ) {
                ## It's an atter like "xmlns='foo'"
                $attribs->{"{}xmlns"} =
                  {
                   Name         => "xmlns",
                   LocalName    => "xmlns",
                   Prefix       => "",
                   Value        => $attr->href,
                   NamespaceURI => "",
                  };
            }
            else {
                my $prefix = "xmlns";
                my $localname = $attr->localname;
                my $key = "{http://www.w3.org/2000/xmlns/}";
                my $name = "xmlns";

if ( defined $localname ) {
                    $key .= $localname;
                    $name.= ":".$localname;
                }

$attribs->{$key} =
                  {
                   Name         => $name,
                   Value        => $attr->href,
                   NamespaceURI => "http://www.w3.org/2000/xmlns/",
                   Prefix       => $prefix,
                   LocalName    => $localname,
                  };
            }
        }
        else {
            my $ns = $attr->namespaceURI;

$ns = '' unless defined $ns;
            $key = "{$ns}".$attr->localname;
            ## Not sure why, but $attr->name is coming through stripped
            ## of its prefix, so we need to hand-assemble a real name.
            my $name = $attr->name;
            $name = "" unless defined $name;

my $prefix = $attr->prefix;
            $prefix = "" unless defined $prefix;
            $name = "$prefix:$name"
              if index( $name, ":" ) < 0 && length $prefix;

$attribs->{$key} =
                {
                    Name => $name,
                    Value => $attr->value,
                    NamespaceURI => $ns,
                    Prefix => $prefix,
                    LocalName => $attr->localname,
                };
        }
        # use Data::Dumper;
        # warn("Attr made: ", Dumper($attribs->{$key}), "\n");
    }

my $node = {
        Name => $element->nodeName,
        Attributes => $attribs,
        NamespaceURI => $element->namespaceURI,
        Prefix => $element->prefix || "",
        LocalName => $element->localname,
    };

$self->start_element($node);

foreach my $child ($element->childNodes) {
        $self->process_node($child);
    }

my $end_node = { %$node };

delete $end_node->{Attributes};

$self->end_element($end_node);

foreach my $ns (@ns_maps) {
        $self->end_prefix_mapping(
            {
                NamespaceURI => $ns->href,
                Prefix       => ( defined $ns->localname  ? $ns->localname : ''),
            }
        );
    }
}

__END__

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