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######################################################################
package XML::DOM::NamedNodeMap;
######################################################################
use strict;
use Carp;
use XML::DOM::DOMException;
use XML::DOM::NodeList;
use vars qw( $Special );
# Constant definition:
# Note: a real Name should have at least 1 char, so nobody else should use this
$Special = "";
sub new
{
my ($class, %args) = @_;
$args{Values} = new XML::DOM::NodeList;
# Store all NamedNodeMap properties in element $Special
bless { $Special => \%args}, $class;
}
sub getNamedItem
{
# Don't return the $Special item!
($_[1] eq $Special) ? undef : $_[0]->{$_[1]};
}
sub setNamedItem
{
my ($self, $node) = @_;
my $prop = $self->{$Special};
my $name = $node->getNodeName;
if ($XML::DOM::SafeMode)
{
croak new XML::DOM::DOMException (NO_MODIFICATION_ALLOWED_ERR)
if $self->isReadOnly;
croak new XML::DOM::DOMException (WRONG_DOCUMENT_ERR)
if $node->[XML::DOM::Node::_Doc] != $prop->{Doc};
croak new XML::DOM::DOMException (INUSE_ATTRIBUTE_ERR)
if defined ($node->[XML::DOM::Node::_UsedIn]);
croak new XML::DOM::DOMException (INVALID_CHARACTER_ERR,
"can't add name with NodeName [$name] to NamedNodeMap")
if $name eq $Special;
}
my $values = $prop->{Values};
my $index = -1;
my $prev = $self->{$name};
if (defined $prev)
{
# decouple previous node
$prev->decoupleUsedIn;
# find index of $prev
$index = 0;
for my $val (@{$values})
{
last if ($val == $prev);
$index++;
}
}
$self->{$name} = $node;
$node->[XML::DOM::Node::_UsedIn] = $self;
if ($index == -1)
{
push (@{$values}, $node);
}
else # replace previous node with new node
{
splice (@{$values}, $index, 1, $node);
}
$prev;
}
sub removeNamedItem
{
my ($self, $name) = @_;
# Be careful that user doesn't delete $Special node!
croak new XML::DOM::DOMException (NOT_FOUND_ERR)
if $name eq $Special;
my $node = $self->{$name};
croak new XML::DOM::DOMException (NOT_FOUND_ERR)
unless defined $node;
# The DOM Spec doesn't mention this Exception - I think it's an oversight
croak new XML::DOM::DOMException (NO_MODIFICATION_ALLOWED_ERR)
if $self->isReadOnly;
$node->decoupleUsedIn;
delete $self->{$name};
# remove node from Values list
my $values = $self->getValues;
my $index = 0;
for my $val (@{$values})
{
if ($val == $node)
{
splice (@{$values}, $index, 1, ());
last;
}
$index++;
}
$node;
}
# The following 2 are really bogus. DOM should use an iterator instead (Clark)
sub item
{
my ($self, $item) = @_;
$self->{$Special}->{Values}->[$item];
}
sub getLength
{
my ($self) = @_;
my $vals = $self->{$Special}->{Values};
int (@$vals);
}
#------------------------------------------------------------
# Extra method implementations
sub isReadOnly
{
return 0 if $XML::DOM::IgnoreReadOnly;
my $used = $_[0]->{$Special}->{UsedIn};
defined $used ? $used->isReadOnly : 0;
}
sub cloneNode
{
my ($self, $deep) = @_;
my $prop = $self->{$Special};
my $map = new XML::DOM::NamedNodeMap (Doc => $prop->{Doc});
# Not copying Parent property on purpose!
local $XML::DOM::IgnoreReadOnly = 1; # temporarily...
for my $val (@{$prop->{Values}})
{
my $key = $val->getNodeName;
my $newNode = $val->cloneNode ($deep);
$newNode->[XML::DOM::Node::_UsedIn] = $map;
$map->{$key} = $newNode;
push (@{$map->{$Special}->{Values}}, $newNode);
}
$map;
}
sub setOwnerDocument
{
my ($self, $doc) = @_;
my $special = $self->{$Special};
$special->{Doc} = $doc;
for my $kid (@{$special->{Values}})
{
$kid->setOwnerDocument ($doc);
}
}
sub getChildIndex
{
my ($self, $attr) = @_;
my $i = 0;
for my $kid (@{$self->{$Special}->{Values}})
{
return $i if $kid == $attr;
$i++;
}
-1; # not found
}
sub getValues
{
wantarray ? @{ $_[0]->{$Special}->{Values} } : $_[0]->{$Special}->{Values};
}
# Remove circular dependencies. The NamedNodeMap and its values should
# not be used afterwards.
sub dispose
{
my $self = shift;
for my $kid (@{$self->getValues})
{
undef $kid->[XML::DOM::Node::_UsedIn]; # was delete
$kid->dispose;
}
delete $self->{$Special}->{Doc};
delete $self->{$Special}->{Parent};
delete $self->{$Special}->{Values};
for my $key (keys %$self)
{
delete $self->{$key};
}
}
sub setParentNode
{
$_[0]->{$Special}->{Parent} = $_[1];
}
sub getProperty
{
$_[0]->{$Special}->{$_[1]};
}
#?? remove after debugging
sub toString
{
my ($self) = @_;
my $str = "NamedNodeMap[";
while (my ($key, $val) = each %$self)
{
if ($key eq $Special)
{
$str .= "##Special (";
while (my ($k, $v) = each %$val)
{
if ($k eq "Values")
{
$str .= $k . " => [";
for my $a (@$v)
{
# $str .= $a->getNodeName . "=" . $a . ",";
$str .= $a->toString . ",";
}
$str .= "], ";
}
else
{
$str .= $k . " => " . $v . ", ";
}
}
$str .= "), ";
}
else
{
$str .= $key . " => " . $val . ", ";
}
}
$str . "]";
}
1; # package return code
|
