# $Id: Tree.pm,v 1.2 2003/07/31 07:54:51 matt Exp $
package XML::Parser::Style::Tree;
$XML::Parser::Built_In_Styles{Tree} = 1;
sub Init {
my $expat = shift;
$expat->{Lists} = [];
$expat->{Curlist} = $expat->{Tree} = [];
}
sub Start {
my $expat = shift;
my $tag = shift;
my $newlist = [ { @_ } ];
push @{ $expat->{Lists} }, $expat->{Curlist};
push @{ $expat->{Curlist} }, $tag => $newlist;
$expat->{Curlist} = $newlist;
}
sub End {
my $expat = shift;
my $tag = shift;
$expat->{Curlist} = pop @{ $expat->{Lists} };
}
sub Char {
my $expat = shift;
my $text = shift;
my $clist = $expat->{Curlist};
my $pos = $#$clist;
if ($pos > 0 and $clist->[$pos - 1] eq '0') {
$clist->[$pos] .= $text;
} else {
push @$clist, 0 => $text;
}
}
sub Final {
my $expat = shift;
delete $expat->{Curlist};
delete $expat->{Lists};
$expat->{Tree};
}
1;
__END__
=head1 NAME
XML::Parser::Style::Tree
=head1 SYNOPSIS
use XML::Parser;
my $p = XML::Parser->new(Style => 'Tree');
my $tree = $p->parsefile('foo.xml');
=head1 DESCRIPTION
This module implements XML::Parser's Tree style parser.
When parsing a document, C will return a parse tree for the
document. Each node in the tree
takes the form of a tag, content pair. Text nodes are represented with
a pseudo-tag of "0" and the string that is their content. For elements,
the content is an array reference. The first item in the array is a
(possibly empty) hash reference containing attributes. The remainder of
the array is a sequence of tag-content pairs representing the content
of the element.
So for example the result of parsing:
Hello thereHowdy