private void RewriteUsage(ClassDeclarationIntermediateNode classNode, TagHelperIntermediateNode node, int index, ComponentAttributeExtensionNode attributeNode)
{
// If we can't get a nonempty attribute name, do nothing because there will
// already be a diagnostic for empty values
var identifierToken = DetermineIdentifierToken(attributeNode);
if (identifierToken != null)
{
node.Children.Remove(attributeNode);
// Determine whether this is an element capture or a component capture, and
// if applicable the type name that will appear in the resulting capture code
var componentTagHelper = node.TagHelpers.FirstOrDefault(x => x.IsComponentTagHelper());
if (componentTagHelper != null)
{
// For components, the RefExtensionNode must go after all ComponentAttributeExtensionNode
// and ComponentBodyExtensionNode siblings because they translate to AddAttribute calls.
// We can therefore put it immediately before the ComponentCloseExtensionNode.
var componentCloseNodePosition = LastIndexOf(node.Children, n => n is ComponentCloseExtensionNode);
if (componentCloseNodePosition < 0)
{
// Should never happen - would imply we're running the lowering passes in the wrong order
throw new InvalidOperationException($"Cannot find {nameof(ComponentCloseExtensionNode)} among ref node siblings.");
}
var refExtensionNode = new RefExtensionNode(identifierToken, componentTagHelper.GetTypeName());
node.Children.Insert(componentCloseNodePosition, refExtensionNode);
}
else
{
// For elements, it doesn't matter how the RefExtensionNode is positioned
// among the children, as the node writer takes care of emitting the
// code at the right point after the AddAttribute calls
node.Children.Add(new RefExtensionNode(identifierToken));
}
}
}
public abstract void WriteReferenceCapture(CodeRenderingContext context, RefExtensionNode node);
protected abstract void WriteReferenceCaptureInnards(CodeRenderingContext context, RefExtensionNode node, bool shouldTypeCheck);
