|
public CloneSubtree ( |
||
| destination | the node to add the cloned subtree | |
| return | void | |
/// <seealso cref= XMPUtilsImpl#appendProperties(XMPMeta, XMPMeta, boolean, boolean, boolean) </seealso>
/// <param name="destXmp"> The destination XMP object. </param>
/// <param name="sourceNode"> the source node </param>
/// <param name="destParent"> the parent of the destination node </param>
/// <param name="replaceOldValues"> Replace the values of existing properties. </param>
/// <param name="deleteEmptyValues"> flag if properties with empty values should be deleted
/// in the destination object. </param>
/// <exception cref="XmpException"> </exception>
private static void AppendSubtree(XmpMetaImpl destXmp, XmpNode sourceNode, XmpNode destParent,
bool replaceOldValues, bool deleteEmptyValues)
{
XmpNode destNode = XmpNodeUtils.FindChildNode(destParent, sourceNode.Name, false);
bool valueIsEmpty = false;
if (deleteEmptyValues)
{
valueIsEmpty = sourceNode.Options.Simple
? string.IsNullOrEmpty(sourceNode.Value)
: !sourceNode.HasChildren();
}
if (deleteEmptyValues && valueIsEmpty)
{
if (destNode != null)
{
destParent.RemoveChild(destNode);
}
}
else if (destNode == null)
{
// The one easy case, the destination does not exist.
destParent.AddChild((XmpNode)sourceNode.Clone());
}
else if (replaceOldValues)
{
// The destination exists and should be replaced.
destXmp.SetNode(destNode, sourceNode.Value, sourceNode.Options, true);
destParent.RemoveChild(destNode);
destNode = (XmpNode)sourceNode.Clone();
destParent.AddChild(destNode);
}
else
{
// The destination exists and is not totally replaced. Structs and
// arrays are merged.
PropertyOptions sourceForm = sourceNode.Options;
PropertyOptions destForm = destNode.Options;
if (sourceForm != destForm)
{
return;
}
if (sourceForm.Struct)
{
// To merge a struct process the fields recursively. E.g. add simple missing fields.
// The recursive call to AppendSubtree will handle deletion for fields with empty
// values.
for (IEnumerator it = sourceNode.IterateChildren(); it.MoveNext();)
{
XmpNode sourceField = (XmpNode)it.Current;
if (sourceField == null)
{
continue;
}
AppendSubtree(destXmp, sourceField, destNode, replaceOldValues, deleteEmptyValues);
if (deleteEmptyValues && !destNode.HasChildren())
{
destParent.RemoveChild(destNode);
}
}
}
else if (sourceForm.ArrayAltText)
{
// Merge AltText arrays by the "xml:lang" qualifiers. Make sure x-default is first.
// Make a special check for deletion of empty values. Meaningful in AltText arrays
// because the "xml:lang" qualifier provides unambiguous source/dest correspondence.
for (IEnumerator it = sourceNode.IterateChildren(); it.MoveNext();)
{
XmpNode sourceItem = (XmpNode)it.Current;
if (sourceItem == null)
{
continue;
}
if (!sourceItem.HasQualifier() || !XML_LANG.Equals(sourceItem.GetQualifier(1).Name))
{
continue;
}
int destIndex = XmpNodeUtils.LookupLanguageItem(destNode, sourceItem.GetQualifier(1).Value);
if (deleteEmptyValues && (string.IsNullOrEmpty(sourceItem.Value)))
{
if (destIndex != -1)
{
destNode.RemoveChild(destIndex);
if (!destNode.HasChildren())
{
destParent.RemoveChild(destNode);
}
}
}
else if (destIndex == -1)
{
// Not replacing, keep the existing item.
if (!X_DEFAULT.Equals(sourceItem.GetQualifier(1).Value) || !destNode.HasChildren())
{
sourceItem.CloneSubtree(destNode);
}
else
{
XmpNode destItem = new XmpNode(sourceItem.Name, sourceItem.Value, sourceItem.Options);
sourceItem.CloneSubtree(destItem);
destNode.AddChild(1, destItem);
}
}
}
}
else if (sourceForm.Array)
{
// Merge other arrays by item values. Don't worry about order or duplicates. Source
// items with empty values do not cause deletion, that conflicts horribly with
// merging.
for (IEnumerator @is = sourceNode.IterateChildren(); @is.MoveNext();)
{
XmpNode sourceItem = (XmpNode)@is.Current;
if (sourceItem == null)
{
continue;
}
bool match = false;
for (IEnumerator id = destNode.IterateChildren(); id.MoveNext();)
{
XmpNode destItem = (XmpNode)id.Current;
if (destItem == null)
{
continue;
}
if (ItemValuesMatch(sourceItem, destItem))
{
match = true;
}
}
if (!match)
{
destNode = (XmpNode)sourceItem.Clone();
destParent.AddChild(destNode);
}
}
}
}
}
