public ComponentAttributeIntermediateNode(TagHelperDirectiveAttributeParameterIntermediateNode directiveAttributeParameterNode)
{
if (directiveAttributeParameterNode == null)
{
throw new ArgumentNullException(nameof(directiveAttributeParameterNode));
}
AttributeName = directiveAttributeParameterNode.AttributeNameWithoutParameter;
AttributeStructure = directiveAttributeParameterNode.AttributeStructure;
BoundAttribute = directiveAttributeParameterNode.BoundAttribute;
PropertyName = directiveAttributeParameterNode.BoundAttributeParameter.GetPropertyName();
Source = directiveAttributeParameterNode.Source;
TagHelper = directiveAttributeParameterNode.TagHelper;
TypeName = directiveAttributeParameterNode.BoundAttributeParameter.TypeName;
for (var i = 0; i < directiveAttributeParameterNode.Children.Count; i++)
{
Children.Add(directiveAttributeParameterNode.Children[i]);
}
for (var i = 0; i < directiveAttributeParameterNode.Diagnostics.Count; i++)
{
Diagnostics.Add(directiveAttributeParameterNode.Diagnostics[i]);
}
}
private IntermediateNode RewriteParameterUsage(IntermediateNode parent, TagHelperDirectiveAttributeParameterIntermediateNode node)
{
// Now rewrite the node to look like:
//
// builder.AddEventPreventDefaultAttribute(2, "onclick", true); // If minimized.
// or
// builder.AddEventPreventDefaultAttribute(2, "onclick", someBoolExpression); // If a bool expression is provided in the value.
string eventHandlerMethod;
if (node.BoundAttributeParameter.Name == "preventDefault")
{
eventHandlerMethod = ComponentsApi.RenderTreeBuilder.AddEventPreventDefaultAttribute;
}
else if (node.BoundAttributeParameter.Name == "stopPropagation")
{
eventHandlerMethod = ComponentsApi.RenderTreeBuilder.AddEventStopPropagationAttribute;
}
else
{
// Unsupported event handler attribute parameter. This can only happen if bound attribute descriptor
// is configured to expect a parameter other than 'preventDefault' and 'stopPropagation'.
return(node);
}
var result = new ComponentAttributeIntermediateNode(node)
{
Annotations =
{
[ComponentMetadata.Common.OriginalAttributeName] = node.OriginalAttributeName,
[ComponentMetadata.Common.AddAttributeMethodName] = eventHandlerMethod,
},
};
result.Children.Clear();
if (node.AttributeStructure != AttributeStructure.Minimized)
{
var tokens = GetAttributeContent(node);
result.Children.Add(new CSharpExpressionIntermediateNode());
result.Children[0].Children.AddRange(tokens);
}
return(result);
}
public virtual void VisitTagHelperDirectiveAttributeParameter(TagHelperDirectiveAttributeParameterIntermediateNode node)
{
VisitDefault(node);
}
public override void VisitTagHelperDirectiveAttributeParameter(TagHelperDirectiveAttributeParameterIntermediateNode node)
{
WriteContentNode(node, node.AttributeName, string.Format(CultureInfo.InvariantCulture, "HtmlAttributeValueStyle.{0}", node.AttributeStructure));
}