//-----------------------------------------------------
//
// Constructors
//
//-----------------------------------------------------
/// <summary> Constructor </summary>
internal BindingExpressionBase(BindingBase binding, BindingExpressionBase parent) : base(ExpressionMode.SupportsUnboundSources)
{
if (binding == null)
throw new ArgumentNullException("binding");
_binding = binding;
_parentBindingExpression = parent;
_flags = (PrivateFlags)binding.Flags;
if (parent != null)
{
ResolveNamesInTemplate = parent.ResolveNamesInTemplate;
Type type = parent.GetType();
if (type == typeof(MultiBindingExpression))
ChangeFlag(PrivateFlags.iInMultiBindingExpression, true);
else if (type == typeof(PriorityBindingExpression))
ChangeFlag(PrivateFlags.iInPriorityBindingExpression, true);
}
// initialize tracing information
PresentationTraceLevel traceLevel = PresentationTraceSources.GetTraceLevel(binding);
if (traceLevel > 0)
{
// copy TraceLevel from parent BindingBase - it can be changed later
PresentationTraceSources.SetTraceLevel(this, traceLevel);
}
if (TraceData.IsExtendedTraceEnabled(this, TraceDataLevel.CreateExpression))
{
if (parent == null)
{
TraceData.Trace(TraceEventType.Warning,
TraceData.CreatedExpression(
TraceData.Identify(this),
TraceData.Identify(binding)));
}
else
{
TraceData.Trace(TraceEventType.Warning,
TraceData.CreatedExpressionInParent(
TraceData.Identify(this),
TraceData.Identify(binding),
TraceData.Identify(parent)));
}
}
if (LookupValidationRule(typeof(ExceptionValidationRule)) != null)
{
ChangeFlag(PrivateFlags.iValidatesOnExceptions, true);
}
if (LookupValidationRule(typeof(DataErrorValidationRule)) != null)
{
ChangeFlag(PrivateFlags.iValidatesOnDataErrors, true);
}
}