# $Id$
#
# 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__
|