private static bool GetRelativeSourceObjectFromAssignment(
AstTransformationContext context,
XamlAstXamlPropertyValueNode relativeSourceProperty,
out XamlAstObjectNode relativeSourceObject)
{
relativeSourceObject = null;
if (relativeSourceProperty is null)
{
return(false);
}
if (relativeSourceProperty.Values[0] is XamlMarkupExtensionNode me)
{
if (me.Type.GetClrType() != context.GetAvaloniaTypes().RelativeSource)
{
throw new XamlParseException($"Expected an object of type 'Avalonia.Data.RelativeSource'. Found a object of type '{me.Type.GetClrType().GetFqn()}'", me);
}
relativeSourceObject = (XamlAstObjectNode)me.Value;
return(true);
}
if (relativeSourceProperty.Values[0] is XamlAstObjectNode on)
{
if (on.Type.GetClrType() != context.GetAvaloniaTypes().RelativeSource)
{
throw new XamlParseException($"Expected an object of type 'Avalonia.Data.RelativeSource'. Found a object of type '{on.Type.GetClrType().GetFqn()}'", on);
}
relativeSourceObject = on;
return(true);
}
return(false);
}
public IXamlAstNode Transform(AstTransformationContext context, IXamlAstNode node)
{
if (node is XamlAstObjectNode ni)
{
XamlAstXamlPropertyValueNode propertyNode = null;
for (var c = ni.Children.Count - 1; c >= 0; c--)
{
var child = ni.Children[c];
if (child is IXamlAstValueNode valueNode)
{
if (propertyNode == null)
{
var contentProperty = context.Configuration.FindContentProperty(ni.Type.GetClrType());
if (contentProperty != null)
{
propertyNode = new XamlAstXamlPropertyValueNode(ni,
new XamlAstClrProperty(ni, contentProperty, context.Configuration),
Array.Empty <IXamlAstValueNode>());
}
else
{
var adders = XamlTransformHelpers.FindPossibleAdders(context, ni.Type.GetClrType());
if (adders.Count == 0)
{
// If there's no content property, strip all whitespace-only nodes and continue
WhitespaceNormalization.RemoveWhitespaceNodes(ni.Children);
if (!ni.Children.Contains(child))
{
continue;
}
throw new XamlParseException(
$"No Content property or any Add methods found for type {ni.Type.GetClrType().GetFqn()}",
child);
}
propertyNode = new XamlAstXamlPropertyValueNode(ni, new XamlAstClrProperty(ni,
"Content", ni.Type.GetClrType(), null,
adders.Select(a => new XamlDirectCallPropertySetter(a)
{
BinderParameters = { AllowMultiple = true }
})),
Array.Empty <IXamlAstValueNode>());
}
}
// We are going in reverse order, so insert at the beginning
propertyNode.Values.Insert(0, valueNode);
ni.Children.RemoveAt(c);
}
}
if (propertyNode != null)
{
ni.Children.Add(propertyNode);
}
}
return(node);
}