private void RewriteUsage(Context context, TagHelperIntermediateNode node, TagHelperDescriptor tagHelper)
{
if (!tagHelper.IsViewComponentKind())
{
return;
}
context.Add(tagHelper);
// Now we need to insert a create node using the default tag helper runtime. This is similar to
// code in DefaultTagHelperOptimizationPass.
//
// Find the body node.
var i = 0;
while (i < node.Children.Count && node.Children[i] is TagHelperBodyIntermediateNode)
{
i++;
}
while (i < node.Children.Count && node.Children[i] is DefaultTagHelperBodyIntermediateNode)
{
i++;
}
// Now find the last create node.
while (i < node.Children.Count && node.Children[i] is DefaultTagHelperCreateIntermediateNode)
{
i++;
}
// Now i has the right insertion point.
node.Children.Insert(i, new DefaultTagHelperCreateIntermediateNode()
{
FieldName = context.GetFieldName(tagHelper),
TagHelper = tagHelper,
TypeName = context.GetFullyQualifiedName(tagHelper),
});
// Now we need to rewrite any set property nodes to use the default runtime.
for (i = 0; i < node.Children.Count; i++)
{
if (node.Children[i] is TagHelperPropertyIntermediateNode propertyNode &&
propertyNode.TagHelper == tagHelper)
{
// This is a set property for this VCTH - we need to replace it with a node
// that will use our field and property name.
node.Children[i] = new DefaultTagHelperPropertyIntermediateNode(propertyNode)
{
FieldName = context.GetFieldName(tagHelper),
PropertyName = propertyNode.BoundAttribute.GetPropertyName(),
};
}
}
}