public IXamlAstNode Transform(AstTransformationContext context, IXamlAstNode node)
{
if (!(node is XamlAstObjectNode on))
{
return(node);
}
var nonDirectiveChildren = on.Children.Where(a => !(a is XamlAstXmlDirective)).ToList();
if (on.Arguments.Count != 0 ||
nonDirectiveChildren.Count != 1 ||
!(nonDirectiveChildren[0] is IXamlAstValueNode vn) ||
!vn.Type.GetClrType().Equals(context.Configuration.WellKnownTypes.String))
{
return(node);
}
if (XamlTransformHelpers.TryGetCorrectlyTypedValue(context, vn, on.Type.GetClrType(), out var rv))
{
if (nonDirectiveChildren.Count != on.Children.Count)
{
rv = new XamlValueWithManipulationNode(rv, rv,
new XamlManipulationGroupNode(rv, on.Children.OfType <XamlAstXmlDirective>()));
}
return(rv);
}
if (on.Type.GetClrType().IsValueType)
{
throw new XamlLoadException(
$"Unable to convert value {(vn as XamlAstTextNode)?.Text}) to {on.Type.GetClrType()}", vn);
}
// Parser not found, isn't a value type, probably a regular object creation node with text content
return(node);
}
public IXamlAstNode Transform(AstTransformationContext context, IXamlAstNode node)
{
if (node is XamlValueWithManipulationNode valWithManip &&
TryGetNewObjectNodeForXamlDirect(valWithManip, out var newObj) &&
newObj.Arguments.Count == 0)
{
if (!(valWithManip.Manipulation is XamlObjectInitializationNode init) ||
!(init.Manipulation is XamlManipulationGroupNode manipGrp))
{
throw new XamlParseException(
"Unable to find the object initialization node inside object creation.", node);
}
IXamlType objType = newObj.Type.GetClrType();
if (objType.Assembly != context.GetWinUITypes().WinUIControlsAssembly)
{
// Only built-in controls have XamlDirect support.
// Remove the XamlDirect setters since XamlDirect isn't worth using once the object
// is created and return.
RemoveXamlDirectSettersFromAssignments(manipGrp);
return(node);
}
IXamlField typeIndex = context.GetWinUITypes().XamlTypeIndex.GetAllFields().FirstOrDefault(fld => fld.Name == objType.Name);
if (typeIndex is null)
{
// We didn't find a matching type index, so we can't use XamlDirect.
// Remove the XamlDirect setters since XamlDirect isn't worth using once the object
// is created and return.
RemoveXamlDirectSettersFromAssignments(manipGrp);
return(node);
}
IXamlAstValueNode constructedObjNode = new XamlDirectNewObjectNode(newObj, context.GetWinUITypes().IXamlDirectObject, typeIndex);
var xamlDirectAssignmentsNode = new XamlManipulationGroupNode(constructedObjNode);
var standardAssignmentsNode = new XamlManipulationGroupNode(constructedObjNode);
ExtractXamlDirectAssignments(manipGrp, xamlDirectAssignmentsNode, standardAssignmentsNode);
if (xamlDirectAssignmentsNode.Children.Count != 0)
{
constructedObjNode = new XamlValueWithManipulationNode(constructedObjNode, constructedObjNode, xamlDirectAssignmentsNode);
}
if (standardAssignmentsNode.Children.Count == 0)
{
node = new XamlObjectFromDirectObjectNode(constructedObjNode, newObj.Type);
}
else
{
valWithManip.Value = new XamlObjectFromDirectObjectNode(constructedObjNode, newObj.Type);
init.Manipulation = standardAssignmentsNode;
}
}
return(node);
