internal PrefixChange( string oldPrefix, string newPrefix, string ns, ulong opid,
PrefixChange next )
{
_oldPrefix = oldPrefix;
_newPrefix = newPrefix;
_NS = ns;
_opid = opid;
_next = next;
}
// returns appropriate operation ID for this namespace or prefix change
private ulong GetNamespaceChangeOpid( string oldNamespaceURI, string oldPrefix,
string newNamespaceURI, string newPrefix)
{
Debug.Assert( !_xmlDiff.IgnoreNamespaces );
ulong opid = 0;
// namespace change
if ( oldNamespaceURI != newNamespaceURI )
{
// prefix must remain the same
if ( oldPrefix != newPrefix )
return 0;
// lookup this change in the list of namespace changes
NamespaceChange nsChange = _namespaceChangeDescr;
while ( nsChange != null )
{
if ( nsChange._oldNS == oldNamespaceURI &&
nsChange._prefix == oldPrefix &&
nsChange._newNS == newNamespaceURI )
{
return nsChange._opid;
}
nsChange = nsChange._next;
}
// the change record was not found -> create a new one
opid = GenerateOperationID( XmlDiffDescriptorType.NamespaceChange );
_namespaceChangeDescr = new NamespaceChange( oldPrefix, oldNamespaceURI, newNamespaceURI,
opid, _namespaceChangeDescr );
}
// prefix change
else if ( !_xmlDiff.IgnorePrefixes &&
oldPrefix != newPrefix )
{
// lookup this change in the list of prefix changes
PrefixChange prefixChange = _prefixChangeDescr;
while ( prefixChange != null )
{
if ( prefixChange._NS == oldNamespaceURI &&
prefixChange._oldPrefix == oldPrefix &&
prefixChange._newPrefix == newPrefix )
{
return prefixChange._opid;
}
prefixChange = prefixChange._next;
}
// the change record was not found -> create a new one
opid = GenerateOperationID( XmlDiffDescriptorType.PrefixChange );
_prefixChangeDescr = new PrefixChange( oldPrefix, newPrefix,
oldNamespaceURI,
opid,
_prefixChangeDescr );
}
return opid;
}
