private RawDataSourceInfoBase MoveToDataContextProperty(IDataContextAncestorWalker walker, RawDataSourceInfoBase localDataSource)
{
if (walker.CurrentNode == null)
{
return((RawDataSourceInfoBase)null);
}
DataContextProperty dataContextProperty = DataContextMetadata.GetDataContextProperty(walker.CurrentNode, walker.CurrentProperty);
if (dataContextProperty == null)
{
return((RawDataSourceInfoBase)null);
}
if (!dataContextProperty.IsValid)
{
return((RawDataSourceInfoBase)RawDataSourceInfo.Invalid);
}
if (this.visitedLocations.IsVisited(walker))
{
return((RawDataSourceInfoBase)RawDataSourceInfo.Invalid);
}
DocumentNode dataContextNode = dataContextProperty.DataContextNode;
if (dataContextNode == null)
{
return((RawDataSourceInfoBase)RawDataSourceInfo.Invalid);
}
this.OnDataSourceFound(walker.CurrentNode, walker.CurrentProperty);
RawDataSourceInfoBase rawDataSourceInfo = DataContextHelper.GetRawDataSourceInfo(dataContextNode);
if (rawDataSourceInfo.IsValid && dataContextProperty.IsCollectionItem)
{
rawDataSourceInfo.AppendIndexStep();
}
RawDataSourceInfoBase localDataSource1 = rawDataSourceInfo.CombineWith(localDataSource);
walker.MoveTo(dataContextProperty.SourceNode, dataContextProperty.Property, true);
return(this.UnwindElementNameBindingInternal(walker, localDataSource1));
}
protected RawDataSourceInfoBase CombineDataSources(RawDataSourceInfoBase inheritedDataContext, RawDataSourceInfoBase localDataContext)
{
if (localDataContext == null)
{
return(inheritedDataContext);
}
if (!localDataContext.IsValid || localDataContext.HasSource)
{
return(localDataContext);
}
ElementDataSourceInfo elementDataSourceInfo = localDataContext as ElementDataSourceInfo;
RawDataSourceInfoBase localSource;
if (elementDataSourceInfo == null)
{
localSource = inheritedDataContext == null || !inheritedDataContext.IsValid ? localDataContext : inheritedDataContext.CombineWith(localDataContext);
}
else
{
DataBindingProcessingContext context;
if (!this.namedElementDataContexts.TryGetValue(elementDataSourceInfo.RootElement, out context))
{
localSource = (RawDataSourceInfoBase)elementDataSourceInfo;
}
else
{
DataBindingProcessor.DataContextWalker dataContextWalker = new DataBindingProcessor.DataContextWalker(context, (IProperty)null, this.namedElementDataContexts);
localSource = this.DataContextEvaluator.UnwindElementNameBinding((IDataContextAncestorWalker)dataContextWalker, (RawDataSourceInfoBase)elementDataSourceInfo);
if (!(localSource is ElementDataSourceInfo))
{
this.DataContextEvaluator.MoveUpIfDataContextLocation((IDataContextAncestorWalker)dataContextWalker);
if (dataContextWalker.CurrentContext != null)
{
localSource = dataContextWalker.CurrentContext.DataContext.CombineWith(localSource);
}
}
}
}
return(localSource);
}
public DataContextInfo Evaluate(IDataContextAncestorWalker walker, bool isForSettingValue)
{
this.visitedLocations.Reset();
DataContextInfo dataContextInfo1 = new DataContextInfo();
RawDataSourceInfoBase dataSourceInfoBase1 = (RawDataSourceInfoBase)null;
bool flag = isForSettingValue;
this.evaluatingInfo = dataContextInfo1;
DataContextInfo dataContextInfo2 = (DataContextInfo)null;
try
{
while (walker.MoveNext())
{
if (flag)
{
flag = DataContextMetadata.GetDataContextAttribute <DualDataContextAttribute>(walker.CurrentProperty) != null;
}
RawDataSourceInfoBase dataSourceInfoBase2 = !flag?this.NavigateSpecialDataContextInternal(walker, dataSourceInfoBase1, true) : dataSourceInfoBase1;
flag = false;
if (dataSourceInfoBase2 != dataSourceInfoBase1)
{
dataSourceInfoBase1 = dataSourceInfoBase2;
this.MoveUpIfDataContextLocation(walker);
}
if (dataSourceInfoBase1 != null)
{
if (!dataSourceInfoBase1.IsValid)
{
break;
}
}
RawDataSourceInfoBase rawDataContextInfo = this.GetRawDataContextInfo(walker);
if (rawDataContextInfo != null)
{
if (rawDataContextInfo.IsValid)
{
dataSourceInfoBase1 = rawDataContextInfo.CombineWith(dataSourceInfoBase1);
}
else if (dataSourceInfoBase1 != null)
{
dataSourceInfoBase1.SetInvalid();
}
else
{
dataSourceInfoBase1 = rawDataContextInfo;
}
}
if (dataSourceInfoBase1 != null)
{
if (dataSourceInfoBase1.IsValid)
{
if (dataSourceInfoBase1.HasSource)
{
break;
}
}
else
{
break;
}
}
if (dataContextInfo2 == null)
{
dataContextInfo2 = this.GetTypedTemplateDataContext(walker.CurrentNode, dataSourceInfoBase1);
}
}
}
finally
{
this.evaluatingInfo = (DataContextInfo)null;
}
if (dataContextInfo2 != null && dataContextInfo2.DataSource.IsValidWithSource && (dataSourceInfoBase1 == null || !dataSourceInfoBase1.IsValid || !dataSourceInfoBase1.HasSource))
{
dataContextInfo1 = dataContextInfo2;
}
else
{
dataContextInfo1.RawDataSource = dataSourceInfoBase1;
}
return(dataContextInfo1);
}