private IReadOnlyList <CompletionItem> GetElementCompletions(
SyntaxNode containingTag,
string containingTagName,
IEnumerable <KeyValuePair <string, string> > attributes,
RazorCodeDocument codeDocument)
{
var ancestors = containingTag.Ancestors();
var tagHelperDocumentContext = codeDocument.GetTagHelperContext();
var(ancestorTagName, ancestorIsTagHelper) = _tagHelperFactsService.GetNearestAncestorTagInfo(ancestors);
var elementCompletionContext = new ElementCompletionContext(
tagHelperDocumentContext,
existingCompletions: Enumerable.Empty <string>(),
containingTagName,
attributes,
ancestorTagName,
ancestorIsTagHelper,
HtmlFactsService.IsHtmlTagName);
var completionItems = new List <CompletionItem>();
var completionResult = _razorTagHelperCompletionService.GetElementCompletions(elementCompletionContext);
foreach (var completion in completionResult.Completions)
{
var razorCompletionItem = new CompletionItem()
{
Label = completion.Key,
InsertText = completion.Key,
FilterText = completion.Key,
SortText = completion.Key,
Kind = CompletionItemKind.TypeParameter,
CommitCharacters = ElementCommitCharacters,
};
var tagHelperDescriptions = completion.Value.Select(tagHelper => new TagHelperDescriptionInfo(tagHelper.GetTypeName(), tagHelper.Documentation));
var elementDescription = new ElementDescriptionInfo(tagHelperDescriptions.ToList());
razorCompletionItem.SetDescriptionInfo(elementDescription);
completionItems.Add(razorCompletionItem);
}
return(completionItems);
}
private IReadOnlyList <CompletionItem> GetAttributeCompletions(
SyntaxNode containingAttribute,
string containingTagName,
string selectedAttributeName,
IEnumerable <KeyValuePair <string, string> > attributes,
RazorCodeDocument codeDocument)
{
var ancestors = containingAttribute.Parent.Ancestors();
var tagHelperDocumentContext = codeDocument.GetTagHelperContext();
var nonDirectiveAttributeTagHelpers = tagHelperDocumentContext.TagHelpers.Where(tagHelper => !tagHelper.BoundAttributes.Any(attribute => attribute.IsDirectiveAttribute()));
var filteredContext = TagHelperDocumentContext.Create(tagHelperDocumentContext.Prefix, nonDirectiveAttributeTagHelpers);
var(ancestorTagName, ancestorIsTagHelper) = _tagHelperFactsService.GetNearestAncestorTagInfo(ancestors);
var attributeCompletionContext = new AttributeCompletionContext(
filteredContext,
existingCompletions: Enumerable.Empty <string>(),
containingTagName,
selectedAttributeName,
attributes,
ancestorTagName,
ancestorIsTagHelper,
HtmlFactsService.IsHtmlTagName);
var completionItems = new List <CompletionItem>();
var completionResult = _razorTagHelperCompletionService.GetAttributeCompletions(attributeCompletionContext);
foreach (var completion in completionResult.Completions)
{
var filterText = completion.Key;
// This is a little bit of a hack because the information returned by _razorTagHelperCompletionService.GetAttributeCompletions
// does not have enough information for us to determine if a completion is an indexer completion or not. Therefore we have to
// jump through a few hoops below to:
// 1. Determine if this specific completion is an indexer based completion
// 2. Resolve an appropriate snippet if it is. This is more troublesome because we need to remove the ... suffix to accurately
// build a snippet that makes sense for the user to type.
var indexerCompletion = filterText.EndsWith("...");
if (indexerCompletion)
{
filterText = filterText.Substring(0, filterText.Length - 3);
}
var insertTextFormat = InsertTextFormat.Snippet;
if (!TryResolveAttributeInsertionSnippet(filterText, completion.Value, indexerCompletion, out var insertText))
{
insertTextFormat = InsertTextFormat.PlainText;
insertText = filterText;
}
var razorCompletionItem = new CompletionItem()
{
Label = completion.Key,
InsertText = insertText,
InsertTextFormat = insertTextFormat,
FilterText = filterText,
SortText = filterText,
Kind = CompletionItemKind.TypeParameter,
CommitCharacters = AttributeCommitCharacters,
};
var attributeDescriptions = completion.Value.Select(boundAttribute => new TagHelperAttributeDescriptionInfo(
boundAttribute.DisplayName,
boundAttribute.GetPropertyName(),
indexerCompletion ? boundAttribute.IndexerTypeName : boundAttribute.TypeName,
boundAttribute.Documentation));
var attributeDescriptionInfo = new AttributeDescriptionInfo(attributeDescriptions.ToList());
razorCompletionItem.SetDescriptionInfo(attributeDescriptionInfo);
completionItems.Add(razorCompletionItem);
}
return(completionItems);
}
public override HoverModel GetHoverInfo(RazorCodeDocument codeDocument, SourceLocation location, ClientCapabilities clientCapabilities)
{
if (codeDocument is null)
{
throw new ArgumentNullException(nameof(codeDocument));
}
var syntaxTree = codeDocument.GetSyntaxTree();
var change = new SourceChange(location.AbsoluteIndex, length: 0, newText: "");
var owner = syntaxTree.Root.LocateOwner(change);
if (owner is null)
{
Debug.Fail("Owner should never be null.");
return(null);
}
var parent = owner.Parent;
var position = new Position(location.LineIndex, location.CharacterIndex);
var tagHelperDocumentContext = codeDocument.GetTagHelperContext();
var ancestors = owner.Ancestors();
var(parentTag, parentIsTagHelper) = _tagHelperFactsService.GetNearestAncestorTagInfo(ancestors);
if (_htmlFactsService.TryGetElementInfo(parent, out var containingTagNameToken, out var attributes) &&
containingTagNameToken.Span.IntersectsWith(location.AbsoluteIndex))
{
// Hovering over HTML tag name
var stringifiedAttributes = _tagHelperFactsService.StringifyAttributes(attributes);
var binding = _tagHelperFactsService.GetTagHelperBinding(
tagHelperDocumentContext,
containingTagNameToken.Content,
stringifiedAttributes,
parentTag: parentTag,
parentIsTagHelper: parentIsTagHelper);
if (binding is null)
{
// No matching tagHelpers, it's just HTML
return(null);
}
else
{
Debug.Assert(binding.Descriptors.Any());
var range = containingTagNameToken.GetRange(codeDocument.Source);
var result = ElementInfoToHover(binding.Descriptors, range, clientCapabilities);
return(result);
}
}
if (_htmlFactsService.TryGetAttributeInfo(parent, out containingTagNameToken, out _, out var selectedAttributeName, out var selectedAttributeNameLocation, out attributes) &&
selectedAttributeNameLocation?.IntersectsWith(location.AbsoluteIndex) == true)
{
// Hovering over HTML attribute name
var stringifiedAttributes = _tagHelperFactsService.StringifyAttributes(attributes);
var binding = _tagHelperFactsService.GetTagHelperBinding(
tagHelperDocumentContext,
containingTagNameToken.Content,
stringifiedAttributes,
parentTag: parentTag,
parentIsTagHelper: parentIsTagHelper);
if (binding is null)
{
// No matching TagHelpers, it's just HTML
return(null);
}
else
{
Debug.Assert(binding.Descriptors.Any());
var tagHelperAttributes = _tagHelperFactsService.GetBoundTagHelperAttributes(tagHelperDocumentContext, selectedAttributeName, binding);
// Grab the first attribute that we find that intersects with this location. That way if there are multiple attributes side-by-side aka hovering over:
// <input checked| minimized />
// Then we take the left most attribute (attributes are returned in source order).
var attribute = attributes.First(a => a.Span.IntersectsWith(location.AbsoluteIndex));
if (attribute is MarkupTagHelperAttributeSyntax thAttributeSyntax)
{
attribute = thAttributeSyntax.Name;
}
else if (attribute is MarkupMinimizedTagHelperAttributeSyntax thMinimizedAttribute)
{
attribute = thMinimizedAttribute.Name;
}
else if (attribute is MarkupTagHelperDirectiveAttributeSyntax directiveAttribute)
{
attribute = directiveAttribute.Name;
}
else if (attribute is MarkupMinimizedTagHelperDirectiveAttributeSyntax miniDirectiveAttribute)
{
attribute = miniDirectiveAttribute;
}
var attributeName = attribute.GetContent();
var range = attribute.GetRange(codeDocument.Source);
// Include the @ in the range
switch (attribute.Parent.Kind)
{
case SyntaxKind.MarkupTagHelperDirectiveAttribute:
var directiveAttribute = attribute.Parent as MarkupTagHelperDirectiveAttributeSyntax;
range.Start.Character -= directiveAttribute.Transition.FullWidth;
attributeName = "@" + attributeName;
break;
case SyntaxKind.MarkupMinimizedTagHelperDirectiveAttribute:
var minimizedAttribute = containingTagNameToken.Parent as MarkupMinimizedTagHelperDirectiveAttributeSyntax;
range.Start.Character -= minimizedAttribute.Transition.FullWidth;
attributeName = "@" + attributeName;
break;
}
var attributeHoverModel = AttributeInfoToHover(tagHelperAttributes, range, attributeName, clientCapabilities);
return(attributeHoverModel);
}
}
return(null);
}
public override HoverModel GetHoverInfo(RazorCodeDocument codeDocument, SourceSpan location)
{
if (codeDocument is null)
{
throw new ArgumentNullException(nameof(codeDocument));
}
var syntaxTree = codeDocument.GetSyntaxTree();
var change = new SourceChange(location, "");
var owner = syntaxTree.Root.LocateOwner(change);
if (owner == null)
{
Debug.Fail("Owner should never be null.");
return(null);
}
var parent = owner.Parent;
var position = new Position(location.LineIndex, location.CharacterIndex);
var tagHelperDocumentContext = codeDocument.GetTagHelperContext();
var ancestors = owner.Ancestors();
var(parentTag, parentIsTagHelper) = _tagHelperFactsService.GetNearestAncestorTagInfo(ancestors);
if (_htmlFactsService.TryGetElementInfo(parent, out var containingTagNameToken, out var attributes) &&
containingTagNameToken.Span.IntersectsWith(location.AbsoluteIndex))
{
// Hovering over HTML tag name
var stringifiedAttributes = _tagHelperFactsService.StringifyAttributes(attributes);
var binding = _tagHelperFactsService.GetTagHelperBinding(
tagHelperDocumentContext,
containingTagNameToken.Content,
stringifiedAttributes,
parentTag: parentTag,
parentIsTagHelper: parentIsTagHelper);
if (binding is null)
{
// No matching tagHelpers, it's just HTML
return(null);
}
else
{
Debug.Assert(binding.Descriptors.Count() > 0);
var range = GetRangeFromSyntaxNode(containingTagNameToken, codeDocument);
var result = ElementInfoToHover(binding.Descriptors, range);
return(result);
}
}
if (_htmlFactsService.TryGetAttributeInfo(parent, out containingTagNameToken, out var selectedAttributeName, out attributes) &&
attributes.Span.IntersectsWith(location.AbsoluteIndex))
{
// Hovering over HTML attribute name
var stringifiedAttributes = _tagHelperFactsService.StringifyAttributes(attributes);
var binding = _tagHelperFactsService.GetTagHelperBinding(
tagHelperDocumentContext,
containingTagNameToken.Content,
stringifiedAttributes,
parentTag: parentTag,
parentIsTagHelper: parentIsTagHelper);
if (binding is null)
{
// No matching TagHelpers, it's just HTML
return(null);
}
else
{
Debug.Assert(binding.Descriptors.Count() > 0);
var tagHelperAttributes = _tagHelperFactsService.GetBoundTagHelperAttributes(tagHelperDocumentContext, selectedAttributeName, binding);
var attribute = attributes.Single(a => a.Span.IntersectsWith(location.AbsoluteIndex));
var range = GetRangeFromSyntaxNode(attribute, codeDocument);
var attributeHoverModel = AttributeInfoToHover(tagHelperAttributes, range);
return(attributeHoverModel);
}
}
return(null);
}