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// File: TDF_AttributeIterator.cxx
// --------------------------
// Author: DAUTRY Philippe
// <fid@fox.paris1.matra-dtv.fr>
// Copyright: Matra Datavision 1997
// Version: 0.0
// History: Version Date Purpose
// 0.0 Feb 7 1997 Creation
#include <TDF_AttributeIterator.hxx>
//=======================================================================
//function : TDF_AttributeIterator
//purpose :
//=======================================================================
TDF_AttributeIterator::TDF_AttributeIterator()
: myValue (0L),
myWithoutForgotten (Standard_True)
{}
//=======================================================================
//function : TDF_AttributeIterator
//purpose :
//=======================================================================
TDF_AttributeIterator::TDF_AttributeIterator
(const TDF_Label& aLabel,
const Standard_Boolean withoutForgotten)
: myValue (0L),
myWithoutForgotten (withoutForgotten)
{
const Handle(TDF_Attribute)& aFirstAttribute =
aLabel.myLabelNode->FirstAttribute();
if (!aFirstAttribute.IsNull())
goToNext (aFirstAttribute);
}
//=======================================================================
//function : TDF_AttributeIterator
//purpose :
//=======================================================================
TDF_AttributeIterator::TDF_AttributeIterator
(const TDF_LabelNodePtr aLabelNode,
const Standard_Boolean withoutForgotten)
: myValue (0L),
myWithoutForgotten (withoutForgotten)
{
const Handle(TDF_Attribute)& aFirstAttribute = aLabelNode->FirstAttribute();
if (!aFirstAttribute.IsNull())
goToNext (aFirstAttribute);
}
//=======================================================================
//function : TDF_AttributeIterator
//purpose :
//=======================================================================
void TDF_AttributeIterator::Initialize
(const TDF_Label& aLabel,
const Standard_Boolean withoutForgotten)
{
myWithoutForgotten = withoutForgotten;
const Handle(TDF_Attribute)& aFirstAttribute =
aLabel.myLabelNode->FirstAttribute();
if (aFirstAttribute.IsNull())
myValue = 0L;
else
goToNext (aFirstAttribute);
}
//=======================================================================
//function : Next
//purpose :
//=======================================================================
void TDF_AttributeIterator::Next()
{
// A little bit complicated...
// but necessary if we want to find sometimes the Forgotten attributes.
if (myValue) {
const Handle(TDF_Attribute)& anAttribute = myValue->myNext;
if (anAttribute.IsNull())
myValue = 0L;
else
goToNext (anAttribute);
}
}
//=======================================================================
//function : goToNext
//purpose : private method, used by the above
//=======================================================================
void TDF_AttributeIterator::goToNext (const Handle(TDF_Attribute)& anAttr)
{
myValue = anAttr.operator->();
if (myWithoutForgotten) {
while (myValue->IsForgotten()) {
const Handle(TDF_Attribute)& anAttribute = myValue->myNext;
if (anAttribute.IsNull()) {
myValue = 0L;
break;
}
myValue = anAttribute.operator->();
}
}
}
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