private ValidatingReaderNodeData AddContent(XmlNodeType nodeType)
{
Debug.Assert(_contentIndex <= _contentEvents.Length);
ValidatingReaderNodeData contentInfo = _contentEvents[_contentIndex];
if (contentInfo != null)
{
contentInfo.Clear(nodeType);
_contentIndex++;
return(contentInfo);
}
if (_contentIndex >= _contentEvents.Length - 1)
{ //reached capacity of array, Need to increase capacity to twice the initial
ValidatingReaderNodeData[] newContentEvents = new ValidatingReaderNodeData[_contentEvents.Length * 2];
Array.Copy(_contentEvents, 0, newContentEvents, 0, _contentEvents.Length);
_contentEvents = newContentEvents;
}
contentInfo = _contentEvents[_contentIndex];
if (contentInfo == null)
{
contentInfo = new ValidatingReaderNodeData(nodeType);
_contentEvents[_contentIndex] = contentInfo;
}
_contentIndex++;
return(contentInfo);
}
internal ValidatingReaderNodeData RecordTextNode(string textValue, string originalStringValue, int depth, int lineNo, int linePos)
{
ValidatingReaderNodeData textNode = AddContent(XmlNodeType.Text);
textNode.SetItemData(textValue, originalStringValue);
textNode.SetLineInfo(lineNo, linePos);
textNode.Depth = depth;
return(textNode);
}
// Moves to the next attribute.
public override bool MoveToNextAttribute()
{
if (_currentAttrIndex + 1 < _attributeCount)
{
_cachedNode = _attributeEvents[++_currentAttrIndex];
return(true);
}
return(false);
}
// Moves to the attribute with the specified index.
public override void MoveToAttribute(int i)
{
if (i < 0 || i >= _attributeCount)
{
throw new ArgumentOutOfRangeException("i");
}
_currentAttrIndex = i;
_cachedNode = _attributeEvents[i];
}
private ValidatingReaderNodeData CreateDummyTextNode(string attributeValue, int depth)
{
if (_textNode == null)
{
_textNode = new ValidatingReaderNodeData(XmlNodeType.Text);
}
_textNode.Depth = depth;
_textNode.RawValue = attributeValue;
return(_textNode);
}
// Parses the attribute value into one or more Text and/or EntityReference node types.
public override bool ReadAttributeValue()
{
Debug.Assert(_cacheState == CachingReaderState.Replay);
if (_cachedNode.NodeType != XmlNodeType.Attribute)
{
return(false);
}
_cachedNode = CreateDummyTextNode(_cachedNode.RawValue, _cachedNode.Depth + 1);
return(true);
}
// Moves to the first attribute.
public override bool MoveToFirstAttribute()
{
if (_attributeCount == 0)
{
return(false);
}
_currentAttrIndex = 0;
_cachedNode = _attributeEvents[0];
return(true);
}
internal void RecordEndElementNode()
{
ValidatingReaderNodeData recordedNode = AddContent(XmlNodeType.EndElement);
Debug.Assert(_coreReader.NodeType == XmlNodeType.EndElement || (_coreReader.NodeType == XmlNodeType.Element && _coreReader.IsEmptyElement));
recordedNode.SetItemData(_coreReader.LocalName, _coreReader.Prefix, _coreReader.NamespaceURI, _coreReader.Depth);
recordedNode.SetLineInfo(_coreReader as IXmlLineInfo);
if (_coreReader.IsEmptyElement)
{ //Simulated endElement node for <e/>, the coreReader is on cached Element node itself.
_readAhead = true;
}
}
internal void SwitchTextNodeAndEndElement(string textValue, string originalStringValue)
{
Debug.Assert(_coreReader.NodeType == XmlNodeType.EndElement || (_coreReader.NodeType == XmlNodeType.Element && _coreReader.IsEmptyElement));
ValidatingReaderNodeData textNode = RecordTextNode(textValue, originalStringValue, _coreReader.Depth + 1, 0, 0);
int endElementIndex = _contentIndex - 2;
ValidatingReaderNodeData endElementNode = _contentEvents[endElementIndex];
Debug.Assert(endElementNode.NodeType == XmlNodeType.EndElement);
_contentEvents[endElementIndex] = textNode;
_contentEvents[_contentIndex - 1] = endElementNode;
}
private void Init()
{
_coreReaderNameTable = _coreReader.NameTable;
_cacheState = CachingReaderState.Init;
_contentIndex = 0;
_currentAttrIndex = -1;
_currentContentIndex = -1;
_attributeCount = 0;
_cachedNode = null;
_readAhead = false;
//Initialize the cachingReader with start state
if (_coreReader.NodeType == XmlNodeType.Element)
{
ValidatingReaderNodeData element = AddContent(_coreReader.NodeType);
element.SetItemData(_coreReader.LocalName, _coreReader.Prefix, _coreReader.NamespaceURI, _coreReader.Depth); //Only created for element node type
element.SetLineInfo(_lineInfo);
RecordAttributes();
}
}
// Moves to the attribute with the specified LocalName and NamespaceURI
public override bool MoveToAttribute(string name, string ns)
{
ns = (ns == null) ? string.Empty : _coreReaderNameTable.Get(ns);
name = _coreReaderNameTable.Get(name);
ValidatingReaderNodeData attribute;
for (int i = 0; i < _attributeCount; i++)
{
attribute = _attributeEvents[i];
if (Ref.Equal(attribute.LocalName, name) &&
Ref.Equal(attribute.Namespace, ns))
{
_currentAttrIndex = i;
_cachedNode = _attributeEvents[i];
return(true);
}
}
return(false);
}
private ValidatingReaderNodeData AddAttribute(int attIndex)
{
Debug.Assert(attIndex <= _attributeEvents.Length);
ValidatingReaderNodeData attInfo = _attributeEvents[attIndex];
if (attInfo != null)
{
attInfo.Clear(XmlNodeType.Attribute);
return(attInfo);
}
if (attIndex >= _attributeEvents.Length - 1)
{ //reached capacity of array, Need to increase capacity to twice the initial
ValidatingReaderNodeData[] newAttributeEvents = new ValidatingReaderNodeData[_attributeEvents.Length * 2];
Array.Copy(_attributeEvents, 0, newAttributeEvents, 0, _attributeEvents.Length);
_attributeEvents = newAttributeEvents;
}
attInfo = _attributeEvents[attIndex];
if (attInfo == null)
{
attInfo = new ValidatingReaderNodeData(XmlNodeType.Attribute);
_attributeEvents[attIndex] = attInfo;
}
return(attInfo);
}
// Moves to the attribute with the specified Name.
public override bool MoveToAttribute(string name)
{
int i;
if (name.IndexOf(':') == -1)
{
i = GetAttributeIndexWithoutPrefix(name);
}
else
{
i = GetAttributeIndexWithPrefix(name);
}
if (i >= 0)
{
_currentAttrIndex = i;
_cachedNode = _attributeEvents[i];
return(true);
}
else
{
return(false);
}
}
// Reads the next node from the stream/TextReader.
public override async Task <bool> ReadAsync()
{
switch (_cacheState)
{
case CachingReaderState.Init:
_cacheState = CachingReaderState.Record;
goto case CachingReaderState.Record;
case CachingReaderState.Record:
ValidatingReaderNodeData recordedNode = null;
if (await _coreReader.ReadAsync().ConfigureAwait(false))
{
switch (_coreReader.NodeType)
{
case XmlNodeType.Element:
//Dont record element within the content of a union type since the main reader will break on this and the underlying coreReader will be positioned on this node
_cacheState = CachingReaderState.ReaderClosed;
return(false);
case XmlNodeType.EndElement:
recordedNode = AddContent(_coreReader.NodeType);
recordedNode.SetItemData(_coreReader.LocalName, _coreReader.Prefix, _coreReader.NamespaceURI, _coreReader.Depth); //Only created for element node type
recordedNode.SetLineInfo(_lineInfo);
break;
case XmlNodeType.Comment:
case XmlNodeType.ProcessingInstruction:
case XmlNodeType.Text:
case XmlNodeType.CDATA:
case XmlNodeType.Whitespace:
case XmlNodeType.SignificantWhitespace:
recordedNode = AddContent(_coreReader.NodeType);
recordedNode.SetItemData(await _coreReader.GetValueAsync().ConfigureAwait(false));
recordedNode.SetLineInfo(_lineInfo);
recordedNode.Depth = _coreReader.Depth;
break;
default:
break;
}
_cachedNode = recordedNode;
return(true);
}
else
{
_cacheState = CachingReaderState.ReaderClosed;
return(false);
}
case CachingReaderState.Replay:
if (_currentContentIndex >= _contentIndex)
{ //When positioned on the last cached node, switch back as the underlying coreReader is still positioned on this node
_cacheState = CachingReaderState.ReaderClosed;
_cacheHandler(this);
if (_coreReader.NodeType != XmlNodeType.Element || _readAhead)
{ //Only when coreReader not positioned on Element node, read ahead, otherwise it is on the next element node already, since this was not cached
return(await _coreReader.ReadAsync().ConfigureAwait(false));
}
return(true);
}
_cachedNode = _contentEvents[_currentContentIndex];
if (_currentContentIndex > 0)
{
ClearAttributesInfo();
}
_currentContentIndex++;
return(true);
default:
return(false);
}
}
