private void CreatePatchForChildren( XmlNode sourceParent,
XmlElement diffgramParent,
XmlPatchParentOperation patchParent )
{
Debug.Assert( sourceParent != null );
Debug.Assert( diffgramParent != null );
Debug.Assert( patchParent != null );
XmlPatchOperation lastPatchOp = null;
XmlNode node = diffgramParent.FirstChild;
while ( node != null )
{
if ( node.NodeType != XmlNodeType.Element ) {
node = node.NextSibling;
continue;
}
XmlElement diffOp = (XmlElement)node;
XmlNodeList matchNodes = null;
string matchAttr = diffOp.GetAttribute( "match" );
if ( matchAttr != string.Empty )
{
matchNodes = PathDescriptorParser.SelectNodes( _sourceRootNode, sourceParent, matchAttr );
if ( matchNodes.Count == 0 )
XmlPatchError.Error( XmlPatchError.NoMatchingNode, matchAttr );
}
XmlPatchOperation patchOp = null;
switch ( diffOp.LocalName )
{
case "node":
{
Debug.Assert( matchAttr != string.Empty );
if ( matchNodes.Count != 1 )
XmlPatchError.Error( XmlPatchError.MoreThanOneNodeMatched, matchAttr );
XmlNode matchNode = matchNodes.Item( 0 );
if ( _sourceRootNode.NodeType != XmlNodeType.Document ||
( matchNode.NodeType != XmlNodeType.XmlDeclaration && matchNode.NodeType != XmlNodeType.DocumentType ) ) {
patchOp = new PatchSetPosition( matchNode );
CreatePatchForChildren( matchNode, diffOp, (XmlPatchParentOperation) patchOp );
}
break;
}
case "add":
{
// copy node/subtree
if ( matchAttr != string.Empty )
{
bool bSubtree = diffOp.GetAttribute( "subtree" ) != "no";
patchOp = new PatchCopy( matchNodes, bSubtree );
if ( !bSubtree )
CreatePatchForChildren( sourceParent, diffOp, (XmlPatchParentOperation) patchOp );
}
else
{
string type = diffOp.GetAttribute( "type" );
// add single node
if ( type != string.Empty )
{
XmlNodeType nodeType = (XmlNodeType) int.Parse( type );
bool bElement = (nodeType == XmlNodeType.Element);
if ( nodeType != XmlNodeType.DocumentType ) {
patchOp = new PatchAddNode( nodeType,
diffOp.GetAttribute( "name" ),
diffOp.GetAttribute( "ns" ),
diffOp.GetAttribute( "prefix" ),
bElement ? string.Empty : diffOp.InnerText,
_ignoreChildOrder );
if ( bElement )
CreatePatchForChildren( sourceParent, diffOp, (XmlPatchParentOperation) patchOp );
}
else {
patchOp = new PatchAddNode( nodeType,
diffOp.GetAttribute( "name" ),
diffOp.GetAttribute( "systemId" ),
diffOp.GetAttribute( "publicId" ),
diffOp.InnerText,
_ignoreChildOrder );
}
}
// add blob
else
{
Debug.Assert( diffOp.ChildNodes.Count > 0 );
patchOp = new PatchAddXmlFragment( diffOp.ChildNodes );
}
}
break;
}
case "remove":
{
Debug.Assert( matchAttr != string.Empty );
bool bSubtree = diffOp.GetAttribute( "subtree" ) != "no";
patchOp = new PatchRemove( matchNodes, bSubtree );
if ( !bSubtree )
{
Debug.Assert( matchNodes.Count == 1 );
CreatePatchForChildren( matchNodes.Item(0), diffOp, (XmlPatchParentOperation) patchOp );
}
break;
}
case "change":
{
Debug.Assert( matchAttr != string.Empty );
if ( matchNodes.Count != 1 )
XmlPatchError.Error( XmlPatchError.MoreThanOneNodeMatched, matchAttr );
XmlNode matchNode = matchNodes.Item( 0 );
if ( matchNode.NodeType != XmlNodeType.DocumentType ) {
patchOp = new PatchChange( matchNode,
diffOp.HasAttribute( "name" ) ? diffOp.GetAttribute( "name" ) : null,
diffOp.HasAttribute( "ns" ) ? diffOp.GetAttribute( "ns" ) : null,
diffOp.HasAttribute( "prefix" ) ? diffOp.GetAttribute( "prefix" ) : null,
(matchNode.NodeType == XmlNodeType.Element) ? null : diffOp );
}
else {
patchOp = new PatchChange( matchNode,
diffOp.HasAttribute( "name" ) ? diffOp.GetAttribute( "name" ) : null,
diffOp.HasAttribute( "systemId" ) ? diffOp.GetAttribute( "systemId" ) : null,
diffOp.HasAttribute( "publicId" ) ? diffOp.GetAttribute( "publicId" ) : null,
diffOp.IsEmpty ? null : diffOp );
}
if ( matchNode.NodeType == XmlNodeType.Element )
CreatePatchForChildren( matchNode, diffOp, (XmlPatchParentOperation) patchOp );
break;
}
case "descriptor":
return;
default:
Debug.Assert( false, "Invalid element in the XDL diffgram ." );
break;
}
if ( patchOp != null ) {
patchParent.InsertChildAfter( lastPatchOp, patchOp );
lastPatchOp = patchOp;
}
node = node.NextSibling;
}
}
private void CreatePatchForChildren(XmlNode sourceParent,
XmlElement diffgramParent,
XmlPatchParentOperation patchParent)
{
Debug.Assert(sourceParent != null);
Debug.Assert(diffgramParent != null);
Debug.Assert(patchParent != null);
XmlPatchOperation lastPatchOp = null;
XmlNode node = diffgramParent.FirstChild;
while (node != null)
{
if (node.NodeType != XmlNodeType.Element)
{
node = node.NextSibling;
continue;
}
XmlElement diffOp = (XmlElement)node;
XmlNodeList matchNodes = null;
string matchAttr = diffOp.GetAttribute("match");
if (matchAttr != string.Empty)
{
matchNodes = PathDescriptorParser.SelectNodes(_sourceRootNode, sourceParent, matchAttr);
if (matchNodes.Count == 0)
{
XmlPatchError.Error(XmlPatchError.NoMatchingNode, matchAttr);
}
}
XmlPatchOperation patchOp = null;
switch (diffOp.LocalName)
{
case "node":
{
Debug.Assert(matchAttr != string.Empty);
if (matchNodes.Count != 1)
{
XmlPatchError.Error(XmlPatchError.MoreThanOneNodeMatched, matchAttr);
}
XmlNode matchNode = matchNodes.Item(0);
if (_sourceRootNode.NodeType != XmlNodeType.Document ||
(matchNode.NodeType != XmlNodeType.XmlDeclaration && matchNode.NodeType != XmlNodeType.DocumentType))
{
patchOp = new PatchSetPosition(matchNode);
CreatePatchForChildren(matchNode, diffOp, (XmlPatchParentOperation)patchOp);
}
break;
}
case "add":
{
// copy node/subtree
if (matchAttr != string.Empty)
{
bool bSubtree = diffOp.GetAttribute("subtree") != "no";
patchOp = new PatchCopy(matchNodes, bSubtree);
if (!bSubtree)
{
CreatePatchForChildren(sourceParent, diffOp, (XmlPatchParentOperation)patchOp);
}
}
else
{
string type = diffOp.GetAttribute("type");
// add single node
if (type != string.Empty)
{
XmlNodeType nodeType = (XmlNodeType)int.Parse(type);
bool bElement = (nodeType == XmlNodeType.Element);
if (nodeType != XmlNodeType.DocumentType)
{
patchOp = new PatchAddNode(nodeType,
diffOp.GetAttribute("name"),
diffOp.GetAttribute("ns"),
diffOp.GetAttribute("prefix"),
bElement ? string.Empty : diffOp.InnerText,
_ignoreChildOrder);
if (bElement)
{
CreatePatchForChildren(sourceParent, diffOp, (XmlPatchParentOperation)patchOp);
}
}
else
{
patchOp = new PatchAddNode(nodeType,
diffOp.GetAttribute("name"),
diffOp.GetAttribute("systemId"),
diffOp.GetAttribute("publicId"),
diffOp.InnerText,
_ignoreChildOrder);
}
}
// add blob
else
{
Debug.Assert(diffOp.ChildNodes.Count > 0);
patchOp = new PatchAddXmlFragment(diffOp.ChildNodes);
}
}
break;
}
case "remove":
{
Debug.Assert(matchAttr != string.Empty);
bool bSubtree = diffOp.GetAttribute("subtree") != "no";
patchOp = new PatchRemove(matchNodes, bSubtree);
if (!bSubtree)
{
Debug.Assert(matchNodes.Count == 1);
CreatePatchForChildren(matchNodes.Item(0), diffOp, (XmlPatchParentOperation)patchOp);
}
break;
}
case "change":
{
Debug.Assert(matchAttr != string.Empty);
if (matchNodes.Count != 1)
{
XmlPatchError.Error(XmlPatchError.MoreThanOneNodeMatched, matchAttr);
}
XmlNode matchNode = matchNodes.Item(0);
if (matchNode.NodeType != XmlNodeType.DocumentType)
{
patchOp = new PatchChange(matchNode,
diffOp.HasAttribute("name") ? diffOp.GetAttribute("name") : null,
diffOp.HasAttribute("ns") ? diffOp.GetAttribute("ns") : null,
diffOp.HasAttribute("prefix") ? diffOp.GetAttribute("prefix") : null,
(matchNode.NodeType == XmlNodeType.Element) ? null : diffOp);
}
else
{
patchOp = new PatchChange(matchNode,
diffOp.HasAttribute("name") ? diffOp.GetAttribute("name") : null,
diffOp.HasAttribute("systemId") ? diffOp.GetAttribute("systemId") : null,
diffOp.HasAttribute("publicId") ? diffOp.GetAttribute("publicId") : null,
diffOp.IsEmpty ? null : diffOp);
}
if (matchNode.NodeType == XmlNodeType.Element)
{
CreatePatchForChildren(matchNode, diffOp, (XmlPatchParentOperation)patchOp);
}
break;
}
case "descriptor":
return;
default:
Debug.Assert(false, "Invalid element in the XDL diffgram .");
break;
}
if (patchOp != null)
{
patchParent.InsertChildAfter(lastPatchOp, patchOp);
lastPatchOp = patchOp;
}
node = node.NextSibling;
}
}
