public override bool Read()
{
bool readSucceed;
if (this.bufferedXamlNodes.Count > 0)
{
this.Current = this.bufferedXamlNodes.Dequeue();
readSucceed = this.Current != null;
}
else
{
readSucceed = this.underlyingReader.Read();
if (readSucceed)
{
this.Current = CreateCurrentNode(this.underlyingReader, this.xamlLineInfo);
this.PushObjectDeclarationNodeIfApplicable();
switch (this.Current.NodeType)
{
case XamlNodeType.StartMember:
// When we reach a StartMember node, the next node to come might be a Value.
// To correctly pass SourceLocation information, we need to rewrite this node to use ValueNodeXamlMemberInvoker.
// But we don't know if the next node is a Value node yet, so we are buffering here and look ahead for a single node.
UnitTestUtility.Assert(this.bufferedXamlNodes.Count == 0, "this.bufferedXamlNodes should be empty when we reach this code path.");
this.bufferedXamlNodes.Enqueue(this.Current);
// This directive represents the XAML node or XAML information set
// representation of initialization text, where a string within an
// object element supplies the type construction information for
// the surrounding object element.
bool isInitializationValue = this.Current.Member == XamlLanguage.Initialization;
bool moreNode = this.underlyingReader.Read();
UnitTestUtility.Assert(moreNode, "Start Member must followed by some other nodes.");
this.Current = this.CreateCurrentNode();
this.bufferedXamlNodes.Enqueue(this.Current);
// It is possible that the next node after StartMember is a StartObject/GetObject.
// We need to push the object declaration node to the Stack
this.PushObjectDeclarationNodeIfApplicable();
if (!this.SuppressingMarkupExtension() &&
this.Current.NodeType == XamlNodeType.Value)
{
DocumentRange valueRange;
DocumentLocation currentLocation = new DocumentLocation(this.Current.LineNumber, this.Current.LinePosition);
bool isInAttribute = this.xmlReaderWithSourceLocation.AttributeValueRanges.TryGetValue(currentLocation, out valueRange);
bool isInContent = isInAttribute ? false : this.xmlReaderWithSourceLocation.ContentValueRanges.TryGetValue(currentLocation, out valueRange);
if (isInAttribute || (isInContent && !isInitializationValue))
{
// For Value Node with known line info, we want to route the value setting process through this Reader.
// Therefore we need to go back to the member node and replace the XamlMemberInvoker.
XamlNode startMemberNodeForValue = this.bufferedXamlNodes.Peek();
XamlMember xamlMemberForValue = startMemberNodeForValue.Member;
XamlMemberInvoker newXamlMemberInvoker = new ValueNodeXamlMemberInvoker(this, xamlMemberForValue.Invoker, valueRange);
startMemberNodeForValue.Member = xamlMemberForValue.ReplaceXamlMemberInvoker(this.schemaContext, newXamlMemberInvoker);
}
else if (isInContent && isInitializationValue)
{
XamlNode currentStartObject = this.objectDeclarationRecords.Peek();
if (!this.initializationValueRanges.ContainsKey(currentStartObject))
{
this.initializationValueRanges.Add(currentStartObject, valueRange);
}
else
{
UnitTestUtility.Assert(false,
"I assume it is impossible for an object to have more than one initialization member");
}
}
}
this.StartAccessingBuffer();
break;
case XamlNodeType.EndObject:
this.InjectLineInfoXamlNodesToBuffer();
this.StartAccessingBuffer();
break;
case XamlNodeType.Value:
break;
default:
break;
}
}
}
return(readSucceed);
}
private DocumentLocation FindStartElementBracket(DocumentLocation elementLocation)
{
return(this.characterSpottingTextReader.FindCharacterStrictlyBefore('<', elementLocation));
}
private DocumentLocation FindEndElementBracket(DocumentLocation elementLocation)
{
return(this.characterSpottingTextReader.FindCharacterStrictlyAfter('>', elementLocation));
}
public override bool Read()
{
bool result = base.Read();
if (this.NodeType == Xml.XmlNodeType.Element)
{
DocumentLocation elementLocation = this.CurrentLocation;
if (this.IsEmptyElement)
{
DocumentRange emptyElementRange = this.FindEmptyElementRange(elementLocation);
this.EmptyElementRanges.Add(elementLocation, emptyElementRange);
}
else
{
DocumentLocation startElementBracket = this.FindStartElementBracket(elementLocation);
this.StartElementLocations.Add(elementLocation, startElementBracket);
// Push a null as a place holder. In XmlNodeType.Text part, we replace this
// null with real data. Why not pushing real data only without this place holder?
// Because in XmlNodeType.EndElement, we need to know whether there is Text. Think
// about situation like <a>Text1<b><c>Text2</c></b>Text3</a>
// So, each time an Element starts, we push a place holder in the stack so that Start
// and End don't mis-match.
this.contentStartLocationStack.Push(null);
}
int attributeCount = this.AttributeCount;
if (attributeCount > 0)
{
for (int i = 0; i < attributeCount; i++)
{
this.MoveToAttribute(i);
DocumentLocation memberLocation = this.CurrentLocation;
DocumentRange attributeValueRange = this.FindAttributeValueLocation(memberLocation);
this.AttributeValueRanges.Add(memberLocation, attributeValueRange);
}
this.MoveToElement();
}
}
else if (this.NodeType == Xml.XmlNodeType.EndElement)
{
DocumentLocation endElementLocation = this.CurrentLocation;
DocumentLocation endElementBracket = this.FindEndElementBracket(endElementLocation);
this.EndElementLocations.Add(endElementLocation, endElementBracket);
UnitTestUtility.Assert(
this.contentStartLocationStack.Count > 0,
"The stack should contain at least a null we pushed in StartElement.");
DocumentLocation contentStartLocation = this.contentStartLocationStack.Pop();
if (contentStartLocation != null)
{
DocumentLocation contentEnd = this.FindContentEndBefore(endElementLocation);
this.ContentValueRanges.Add(endElementLocation, new DocumentRange(contentStartLocation, contentEnd));
}
}
else if (this.NodeType == Xml.XmlNodeType.Text)
{
UnitTestUtility.Assert(this.contentStartLocationStack.Count > 0, "Adding Text with out StartElement?");
if (this.contentStartLocationStack.Peek() == null)
{
// no text was added since the last StartElement.
// This is the start of the content of this Element.
// <a>ABCDE</a>
// Sometimes, xml reader gives the text by ABC and DE in
// two times.
this.contentStartLocationStack.Pop();
this.contentStartLocationStack.Push(this.CurrentLocation);
}
}
return(result);
}