private void TryLoadRelationships(PartInfo forPart)
{
string sRelRoot = forPart.AbsolutePath();
PartInfo rootPart;
if (m_partsMap.TryGetValue(sRelRoot, out rootPart))
{
// already been here by some other path
// However, need to add the related objects to forPart, which is a copy of the object in the map, because sorting in
// the part filter may change the order in which we retrieve things from the relationship tree
// Slides have circular relationships in the pptx files so watch that if we re-write this to use the mapped objets
List<PartInfo> pliRels = rootPart.GetRelatedObjects();
foreach (PartInfo rpi in pliRels)
{
forPart.AddRelatedItem(rpi);
}
return;
}
m_partsMap[sRelRoot] = forPart;
using (Stream str = GetPartContent(BuildRelationshipPartName(sRelRoot)))
{
if (str == null)
return;
forPart.LoadRelationships(str);
foreach (PartInfo part in forPart.GetRelatedObjects())
{
if (!part.External)
TryLoadRelationships(part);
}
}
}