public static TagMode GetTagMode(
MarkupStartTagSyntax tagBlock,
TagHelperBinding bindingResult,
ErrorSink errorSink)
{
var childSpan = tagBlock.GetLastToken()?.Parent;
// Self-closing tags are always valid despite descriptors[X].TagStructure.
if (childSpan?.GetContent().EndsWith("/>", StringComparison.Ordinal) ?? false)
{
return(TagMode.SelfClosing);
}
foreach (var descriptor in bindingResult.Descriptors)
{
var boundRules = bindingResult.Mappings[descriptor];
var nonDefaultRule = boundRules.FirstOrDefault(rule => rule.TagStructure != TagStructure.Unspecified);
if (nonDefaultRule?.TagStructure == TagStructure.WithoutEndTag)
{
return(TagMode.StartTagOnly);
}
}
return(TagMode.StartTagAndEndTag);
}
public static TagMode GetTagMode(
MarkupStartTagSyntax startTag,
MarkupEndTagSyntax endTag,
TagHelperBinding bindingResult)
{
var childSpan = startTag.GetLastToken()?.Parent;
// Self-closing tags are always valid despite descriptors[X].TagStructure.
if (childSpan?.GetContent().EndsWith("/>", StringComparison.Ordinal) ?? false)
{
return(TagMode.SelfClosing);
}
var hasDirectiveAttribute = false;
foreach (var descriptor in bindingResult.Descriptors)
{
var boundRules = bindingResult.Mappings[descriptor];
var nonDefaultRule = boundRules.FirstOrDefault(rule => rule.TagStructure != TagStructure.Unspecified);
if (nonDefaultRule?.TagStructure == TagStructure.WithoutEndTag)
{
return(TagMode.StartTagOnly);
}
// Directive attribute will tolerate forms that don't work for tag helpers. For instance:
//
// <input @onclick="..."> vs <input onclick="..." />
//
// We don't want this to become an error just because you added a directive attribute.
if (descriptor.IsAnyComponentDocumentTagHelper() && !descriptor.IsComponentOrChildContentTagHelper())
{
hasDirectiveAttribute = true;
}
}
if (hasDirectiveAttribute && startTag.IsVoidElement() && endTag == null)
{
return(TagMode.StartTagOnly);
}
return(TagMode.StartTagAndEndTag);
}