public override bool Read()
{
ThrowIfDisposed();
do
{
if (_nodeStream.MoveNext())
{
_current = _nodeStream.Current;
if (_current.NodeType == XamlNodeType.None)
{
if (_current.LineInfo != null)
{
_currentLineInfo = _current.LineInfo;
}
else if (_current.IsEof)
{
break;
}
else
{
Debug.Assert(_current.IsEof, "Xaml Parser returned an illegal internal XamlNode");
}
}
}
else
{
_current = _endOfStreamNode;
break;
}
} while (_current.NodeType == XamlNodeType.None);
return(!IsEof);
}
private void Initialize(XamlReader wrappedReader, int bufferSize)
{
_providerFullEvent = new EventWaitHandle(false, EventResetMode.AutoReset);
_dataReceivedEvent = new EventWaitHandle(false, EventResetMode.AutoReset);
_incoming = new XamlNode[bufferSize];
_outgoing = new XamlNode[bufferSize];
_wrappedReader = wrappedReader;
_wrappedReaderHasLineInfo = ((IXamlLineInfo)_wrappedReader).HasLineInfo;
var xamlNodeAddDelegate = new XamlNodeAddDelegate(Add);
XamlLineInfoAddDelegate lineInfoAddDelegate = null;
if (_wrappedReaderHasLineInfo)
{
lineInfoAddDelegate = new XamlLineInfoAddDelegate(AddLineInfo);
}
_writer = new WriterDelegate(xamlNodeAddDelegate, lineInfoAddDelegate, _wrappedReader.SchemaContext);
XamlNodeNextDelegate xamlNodeNextDelegate;
if (_wrappedReaderHasLineInfo)
{
xamlNodeNextDelegate = new XamlNodeNextDelegate(Next_ProcessLineInfo);
}
else
{
xamlNodeNextDelegate = new XamlNodeNextDelegate(Next);
}
_internalReader = new ReaderDelegate(_wrappedReader.SchemaContext, xamlNodeNextDelegate, _wrappedReaderHasLineInfo);
//Standin so it won't start null
_currentNode = new XamlNode(XamlNode.InternalNodeType.StartOfStream);
}
public ReaderDelegate(XamlSchemaContext schemaContext, XamlNodeNextDelegate next, bool hasLineInfo)
: base(schemaContext)
{
_nextDelegate = next;
_currentNode = new XamlNode(XamlNode.InternalNodeType.StartOfStream);
_currentLineInfo = null;
_hasLineInfo = hasLineInfo;
}
private void AddToBuffer(XamlNode node)
{
_incoming[_inIdx] = node;
_inIdx += 1;
if (IncomingFull)
{
_providerFullEvent.Set(); // Reader is Full
_dataReceivedEvent.WaitOne(); // Wait for data to be picked up.
}
}
public XamlNodeQueue(XamlSchemaContext schemaContext)
{
if (schemaContext == null)
{
throw new ArgumentNullException(nameof(schemaContext));
}
_nodeQueue = new Queue <XamlNode>();
_endOfStreamNode = new XamlNode(XamlNode.InternalNodeType.EndOfStream);
_writer = new WriterDelegate(Add, AddLineInfo, schemaContext);
}
private void AddLineInfo(int lineNumber, int linePosition)
{
if (IsDisposed)
{
return;
}
LineInfo lineInfo = new LineInfo(lineNumber, linePosition);
XamlNode node = new XamlNode(lineInfo);
AddToBuffer(node);
}
// ======================================
private void Add(XamlNodeType nodeType, object data)
{
if (nodeType != XamlNodeType.None)
{
XamlNode node = new XamlNode(nodeType, data);
_nodeQueue.Enqueue(node);
return;
}
Debug.Assert(XamlNode.IsEof_Helper(nodeType, data));
_nodeQueue.Enqueue(_endOfStreamNode);
}
private void Add(XamlNodeType nodeType, object data)
{
if (IsDisposed)
{
return;
}
if (nodeType != XamlNodeType.None)
{
AddToBuffer(new XamlNode(nodeType, data));
return;
}
Debug.Assert(XamlNode.IsEof_Helper(nodeType, data));
AddToBuffer(new XamlNode(XamlNode.InternalNodeType.EndOfStream));
_providerFullEvent.Set();
}
private void AddLineInfo(int lineNumber, int linePosition)
{
if (_readMode)
{
throw new XamlException(SR.Get(SRID.CannotWriteClosedWriter));
}
XamlNode node = new XamlNode(new LineInfo(lineNumber, linePosition));
_nodeList.Add(node);
if (!_hasLineInfo)
{
_hasLineInfo = true;
}
}
private void AddLineInfo(int lineNumber, int linePosition)
{
LineInfo lineInfo = new LineInfo(lineNumber, linePosition);
XamlNode node = new XamlNode(lineInfo);
_nodeQueue.Enqueue(node);
if (!_hasLineInfo)
{
_hasLineInfo = true;
}
if (_reader != null && !_reader.HasLineInfo)
{
_reader.HasLineInfo = true;
}
}
private void Add(XamlNodeType nodeType, object data)
{
if (!_readMode)
{
if (nodeType != XamlNodeType.None)
{
XamlNode node = new XamlNode(nodeType, data);
_nodeList.Add(node);
return;
}
Debug.Assert(XamlNode.IsEof_Helper(nodeType, data));
_readMode = true;
}
else
{
throw new XamlException(SR.Get(SRID.CannotWriteClosedWriter));
}
}
private XamlNode Next()
{
if (IsDisposed)
{
throw new ObjectDisposedException("XamlBackgroundReader");
}
if (OutgoingEmpty)
{
// This is for users that read PAST the EOF record.
// Don't let them hang on WaitOne() return EOF Again!
if (_currentNode.IsEof)
{
return(_currentNode);
}
_providerFullEvent.WaitOne(); // Wait for provider to fill up.
SwapBuffers();
_dataReceivedEvent.Set(); // Let the Reader run.
}
_currentNode = _outgoing[_outIdx++];
if (_currentNode.IsEof)
{
if (_thread != null)
{
// If the input ended due to an (caught) exception on the background thread,
// then at the end of reading the input re-throw the exception on the
// foreground thread.
_thread.Join();
if (_caughtException != null)
{
Exception ex = _caughtException;
_caughtException = null;
throw ex;
}
}
}
return(_currentNode);
}
private void Initialize(XmlReader givenXmlReader, XamlSchemaContext schemaContext, XamlXmlReaderSettings settings)
{
XmlReader myXmlReader;
_mergedSettings = (settings == null) ? new XamlXmlReaderSettings() : new XamlXmlReaderSettings(settings);
//Wrap the xmlreader with a XmlCompatReader instance to apply MarkupCompat rules.
if (!_mergedSettings.SkipXmlCompatibilityProcessing)
{
XmlCompatibilityReader mcReader =
new XmlCompatibilityReader(givenXmlReader,
new IsXmlNamespaceSupportedCallback(IsXmlNamespaceSupported)
);
mcReader.Normalization = true;
myXmlReader = mcReader;
}
else
{ //Don't wrap the xmlreader with XmlCompatReader.
// Useful for uses where users want to keep mc: content in the XamlNode stream.
// Or have already processed the markup compat and want that extra perf.
myXmlReader = givenXmlReader;
}
// Pick up the XmlReader settings to override the "settings" defaults.
if (!String.IsNullOrEmpty(myXmlReader.BaseURI))
{
_mergedSettings.BaseUri = new Uri(myXmlReader.BaseURI);
}
if (myXmlReader.XmlSpace == XmlSpace.Preserve)
{
_mergedSettings.XmlSpacePreserve = true;
}
if (!String.IsNullOrEmpty(myXmlReader.XmlLang))
{
_mergedSettings.XmlLang = myXmlReader.XmlLang;
}
IXmlNamespaceResolver myXmlReaderNS = myXmlReader as IXmlNamespaceResolver;
Dictionary <string, string> xmlnsDictionary = null;
if (myXmlReaderNS != null)
{
IDictionary <string, string> rootNamespaces = myXmlReaderNS.GetNamespacesInScope(XmlNamespaceScope.Local);
if (rootNamespaces != null)
{
foreach (KeyValuePair <string, string> ns in rootNamespaces)
{
if (xmlnsDictionary == null)
{
xmlnsDictionary = new Dictionary <string, string>();
}
xmlnsDictionary[ns.Key] = ns.Value;
}
}
}
if (schemaContext == null)
{
schemaContext = new XamlSchemaContext();
}
_endOfStreamNode = new XamlNode(XamlNode.InternalNodeType.EndOfStream);
_context = new XamlParserContext(schemaContext, _mergedSettings.LocalAssembly);
_context.AllowProtectedMembersOnRoot = _mergedSettings.AllowProtectedMembersOnRoot;
_context.AddNamespacePrefix(KnownStrings.XmlPrefix, XamlLanguage.Xml1998Namespace);
Func <string, string> namespaceResolver = myXmlReader.LookupNamespace;
_context.XmlNamespaceResolver = namespaceResolver;
XamlScanner xamlScanner = new XamlScanner(_context, myXmlReader, _mergedSettings);
XamlPullParser parser = new XamlPullParser(_context, xamlScanner, _mergedSettings);
_nodeStream = new NodeStreamSorter(_context, parser, _mergedSettings, xmlnsDictionary);
_current = new XamlNode(XamlNode.InternalNodeType.StartOfStream); // user must call Read() before using properties.
_currentLineInfo = new LineInfo(0, 0);
}