package XML::Mini::Node;
use strict;
$^W = 1;
use XML::Mini;
use XML::Mini::TreeComponent;

use vars qw ( $VERSION @ISA );

push @ISA, qw ( XML::Mini::TreeComponent );
$VERSION = '1.24';

sub new
{
    my $class = shift;
    my $value = shift;
    
    my $self = {};
    bless $self, ref $class || $class;
    
    if (defined ($value))
    {
	if ($XML::Mini::IgnoreWhitespaces)
	{
	    $value =~ s/^\s*(.*?)\s*$/$1/;
	}
	
	if ($XML::Mini::AutoEscapeEntities)
	{
	    $value = XML::Mini->escapeEntities($value);
	}
	
	if ($XML::Mini::Debug)
	{
	    XML::Mini->Log("Setting value of node to '$value'");
	  }
	
	$self->{'_contents'} = $value;
    }
    return $self;
}

sub getValue
{
    my $self = shift;
    if ($XML::Mini::Debug)
    {
	XML::Mini->Log("Returning value of node as '" . $self->{'_contents'} . "'");
    }
    return $self->{'_contents'};
}

sub text
{
    my $self = shift;
    my $setToPrim = shift;
    my $setToAlt = shift;
    
    my $setTo = defined ($setToPrim) ? $setToPrim : $setToAlt;
    
    if (defined ($setTo))
    {
	if ($XML::Mini::IgnoreWhitespaces)
	{
	    $setTo =~ s/^\s*(.*?)\s*$/$1/;
	}
	
	if ($XML::Mini::AutoEscapeEntities)
	{
	    $setTo = XML::Mini->escapeEntities($setTo);
	}
	
	if ($XML::Mini::Debug)
	{
	    XML::Mini->Log("Setting text of node to '$setTo'");
	  }
	
	$self->{'_contents'} = $setTo;
    }
    return $self->{'_contents'};
}

sub numeric
{
    my $self = shift;
    my $setToPrim = shift;
    my $setToAlt = shift;
    
    my $setTo = defined ($setToPrim) ? $setToPrim : $setToAlt;
    
    if (defined $setTo)
    {
	if ($setTo =~ m/^\s*[Ee\d\.\+-]+\s*$/)
	{
	    return $self->text($setTo);
	} else {
	    XML::Mini->Error("Node::numeric() Must pass a NUMERIC value to set ($setTo)");
	  }
    }
    
    return $self->{'_contents'};
}

sub toString
{
    my $self = shift;
    my $depth = shift;
    
    if ($XML::Mini::Debug)
    {
	XML::Mini->Log("Node::toString() call with depth $depth");
      }

    if ($depth == $XML::Mini::NoWhiteSpaces)
    {
	return $self->toStringNoWhiteSpaces();
	
    }
    
    my $spaces = $self->_spaceStr($depth);

    my $retStr = $spaces;
    $retStr .= "$self->{'_contents'}";
    $retStr =~ s/\n\s*/\n$spaces/smg;

    return $retStr;
}

sub toStringNoWhiteSpaces
{
    my $self = shift;
    my $retStr = "$self->{'_contents'}";
    return $retStr;
}

1;

__END__

=head1 NAME

XML::Mini::Node - XML node for XML::Midi parser/generator

=head1 DESCRIPTION

Nodes are used as atomic containers for numerical and text data
and act as leaves in the XML tree.

They have no name or children.

They always exist as children of XML::MiniElements.
For example, 
<B>this text is bold</B>
Would be represented as a XML::MiniElement named 'B' with a single
child, a Node object which contains the string 'this text 
is bold'.

a Node has
 

 - a parent
 - data (text OR numeric)


=head2 getValue

Returns the text or numeric value of this Node.
	

=head2 text [SETTO [SETTOALT]]

The text() method is used to get or set text data for this node.
If SETTO is passed, the node's content is set to the SETTO string.

If the optional SETTOALT is passed and SETTO is false, the 
node's value is set to SETTOALT.  

Returns this node's text, if set or NULL 

=head2 	numeric [SETTO [SETTOALT]]

The numeric() method is used to get or set numerical data for this node.

If SETTO is passed, the node's content is set to the SETTO string.

If the optional SETTOALT is passed and SETTO is NULL, the 
node's value is set to SETTOALT.  

Returns this node's text, if set or NULL 

=head2 toString [DEPTH]

Returns this node's contents as a string.
If the special DEPTH $XML::Mini::NoWhiteSpaces is passed,
no whitespaces will be inserted.

=cut