private async Task <Document> CreateChangedDocument(CodeFixContext context, PropertyDeclarationSyntax propertyDeclarationSyntax, CancellationToken cancellationToken)
{
DocumentationCommentTriviaSyntax documentationComment = propertyDeclarationSyntax.GetDocumentationCommentTriviaSyntax();
if (documentationComment == null)
{
return(context.Document);
}
XmlElementSyntax summaryElement = (XmlElementSyntax)documentationComment.Content.GetFirstXmlElement("summary");
if (summaryElement == null)
{
return(context.Document);
}
SyntaxList <XmlNodeSyntax> summaryContent = summaryElement.Content;
XmlNodeSyntax firstContent = summaryContent.FirstOrDefault(IsContentElement);
XmlTextSyntax firstText = firstContent as XmlTextSyntax;
if (firstText != null)
{
string firstTextContent = string.Concat(firstText.DescendantTokens());
if (firstTextContent.TrimStart().StartsWith("Gets ", StringComparison.Ordinal))
{
// Find the token containing "Gets "
SyntaxToken getsToken = default(SyntaxToken);
foreach (SyntaxToken textToken in firstText.TextTokens)
{
if (textToken.IsMissing)
{
continue;
}
if (!textToken.Text.TrimStart().StartsWith("Gets ", StringComparison.Ordinal))
{
continue;
}
getsToken = textToken;
break;
}
if (!getsToken.IsMissing)
{
string text = getsToken.Text;
string valueText = getsToken.ValueText;
int index = text.IndexOf("Gets ");
if (index >= 0)
{
bool additionalCharacters = index + 5 < text.Length;
text = text.Substring(0, index)
+ (additionalCharacters ? char.ToUpperInvariant(text[index + 5]).ToString() : string.Empty)
+ text.Substring(index + (additionalCharacters ? (5 + 1) : 5));
}
index = valueText.IndexOf("Gets ");
if (index >= 0)
{
valueText = valueText.Remove(index, 5);
}
SyntaxToken replaced = SyntaxFactory.Token(getsToken.LeadingTrivia, getsToken.Kind(), text, valueText, getsToken.TrailingTrivia);
summaryContent = summaryContent.Replace(firstText, firstText.ReplaceToken(getsToken, replaced));
}
}
}
string defaultValueToken = "NullIfNotIncluded";
SemanticModel semanticModel = await context.Document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
IPropertySymbol propertySymbol = semanticModel.GetDeclaredSymbol(propertyDeclarationSyntax);
if (propertySymbol != null)
{
ITypeSymbol propertyType = propertySymbol.Type;
if (propertyType.IsImmutableArray())
{
defaultValueToken = "DefaultArrayIfNotIncluded";
}
}
XmlElementSyntax valueElement =
XmlSyntaxFactory.MultiLineElement(
"value",
XmlSyntaxFactory.List(
XmlSyntaxFactory.ParaElement(XmlSyntaxFactory.PlaceholderElement(summaryContent.WithoutFirstAndLastNewlines())),
XmlSyntaxFactory.NewLine(),
XmlSyntaxFactory.TokenElement(defaultValueToken)));
XmlNodeSyntax leadingNewLine = XmlSyntaxFactory.NewLine();
// HACK: The formatter isn't working when contents are added to an existing documentation comment, so we
// manually apply the indentation from the last line of the existing comment to each new line of the
// generated content.
SyntaxTrivia exteriorTrivia = GetLastDocumentationCommentExteriorTrivia(documentationComment);
if (!exteriorTrivia.Token.IsMissing)
{
leadingNewLine = leadingNewLine.ReplaceExteriorTrivia(exteriorTrivia);
valueElement = valueElement.ReplaceExteriorTrivia(exteriorTrivia);
}
DocumentationCommentTriviaSyntax newDocumentationComment = documentationComment.WithContent(
documentationComment.Content.InsertRange(documentationComment.Content.Count - 1,
XmlSyntaxFactory.List(
leadingNewLine,
valueElement)));
SyntaxNode root = await context.Document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
SyntaxNode newRoot = root.ReplaceNode(documentationComment, newDocumentationComment);
return(context.Document.WithSyntaxRoot(newRoot));
}
public static SyntaxList <XmlNodeSyntax> WithoutFirstAndLastNewlines(this SyntaxList <XmlNodeSyntax> summaryContent)
{
if (summaryContent.Count == 0)
{
return(summaryContent);
}
XmlTextSyntax firstSyntax = summaryContent[0] as XmlTextSyntax;
if (firstSyntax == null)
{
return(summaryContent);
}
XmlTextSyntax lastSyntax = summaryContent[summaryContent.Count - 1] as XmlTextSyntax;
if (lastSyntax == null)
{
return(summaryContent);
}
SyntaxTokenList firstSyntaxTokens = firstSyntax.TextTokens;
int removeFromStart;
if (IsXmlNewLine(firstSyntaxTokens[0]))
{
removeFromStart = 1;
}
else
{
if (!IsXmlWhitespace(firstSyntaxTokens[0]))
{
return(summaryContent);
}
if (!IsXmlNewLine(firstSyntaxTokens[1]))
{
return(summaryContent);
}
removeFromStart = 2;
}
SyntaxTokenList lastSyntaxTokens = lastSyntax.TextTokens;
int removeFromEnd;
if (IsXmlNewLine(lastSyntaxTokens[lastSyntaxTokens.Count - 1]))
{
removeFromEnd = 1;
}
else
{
if (!IsXmlWhitespace(lastSyntaxTokens[lastSyntaxTokens.Count - 1]))
{
return(summaryContent);
}
if (!IsXmlNewLine(lastSyntaxTokens[lastSyntaxTokens.Count - 2]))
{
return(summaryContent);
}
removeFromEnd = 2;
}
for (int i = 0; i < removeFromStart; i++)
{
firstSyntaxTokens = firstSyntaxTokens.RemoveAt(0);
}
if (firstSyntax == lastSyntax)
{
lastSyntaxTokens = firstSyntaxTokens;
}
for (int i = 0; i < removeFromEnd; i++)
{
if (!lastSyntaxTokens.Any())
{
break;
}
lastSyntaxTokens = lastSyntaxTokens.RemoveAt(lastSyntaxTokens.Count - 1);
}
summaryContent = summaryContent.RemoveAt(summaryContent.Count - 1);
if (lastSyntaxTokens.Count != 0)
{
summaryContent = summaryContent.Add(lastSyntax.WithTextTokens(lastSyntaxTokens));
}
if (firstSyntax != lastSyntax)
{
summaryContent = summaryContent.RemoveAt(0);
if (firstSyntaxTokens.Count != 0)
{
summaryContent = summaryContent.Insert(0, firstSyntax.WithTextTokens(firstSyntaxTokens));
}
}
if (summaryContent.Count > 0)
{
// Make sure to remove the leading trivia
summaryContent = summaryContent.Replace(summaryContent[0], summaryContent[0].WithLeadingTrivia());
// Remove leading spaces (between the <para> start tag and the start of the paragraph content)
XmlTextSyntax firstTextSyntax = summaryContent[0] as XmlTextSyntax;
if (firstTextSyntax != null && firstTextSyntax.TextTokens.Count > 0)
{
SyntaxToken firstTextToken = firstTextSyntax.TextTokens[0];
string firstTokenText = firstTextToken.Text;
string trimmed = firstTokenText.TrimStart();
if (trimmed != firstTokenText)
{
SyntaxToken newFirstToken = SyntaxFactory.Token(
firstTextToken.LeadingTrivia,
firstTextToken.Kind(),
trimmed,
firstTextToken.ValueText.TrimStart(),
firstTextToken.TrailingTrivia);
summaryContent = summaryContent.Replace(firstTextSyntax, firstTextSyntax.ReplaceToken(firstTextToken, newFirstToken));
}
}
}
return(summaryContent);
}
private bool TryRemoveSummaryPrefix(ref SyntaxList <XmlNodeSyntax> summaryContent, string prefix)
{
XmlNodeSyntax firstContent = summaryContent.FirstOrDefault(IsContentElement);
XmlTextSyntax firstText = firstContent as XmlTextSyntax;
if (firstText == null)
{
return(false);
}
string firstTextContent = string.Concat(firstText.DescendantTokens());
if (!firstTextContent.TrimStart().StartsWith(prefix, StringComparison.Ordinal))
{
return(false);
}
// Find the token containing the prefix, such as "Gets or sets "
SyntaxToken prefixToken = default(SyntaxToken);
foreach (SyntaxToken textToken in firstText.TextTokens)
{
if (textToken.IsMissing)
{
continue;
}
if (!textToken.Text.TrimStart().StartsWith(prefix, StringComparison.Ordinal))
{
continue;
}
prefixToken = textToken;
break;
}
if (prefixToken.IsMissingOrDefault())
{
return(false);
}
string text = prefixToken.Text;
string valueText = prefixToken.ValueText;
int index = text.IndexOf(prefix);
if (index >= 0)
{
bool additionalCharacters = index + prefix.Length < text.Length;
text = text.Substring(0, index)
+ (additionalCharacters ? char.ToUpperInvariant(text[index + prefix.Length]).ToString() : string.Empty)
+ text.Substring(index + (additionalCharacters ? (prefix.Length + 1) : prefix.Length));
}
index = valueText.IndexOf(prefix);
if (index >= 0)
{
valueText = valueText.Remove(index, prefix.Length);
}
SyntaxToken replaced = SyntaxFactory.Token(prefixToken.LeadingTrivia, prefixToken.Kind(), text, valueText, prefixToken.TrailingTrivia);
summaryContent = summaryContent.Replace(firstText, firstText.ReplaceToken(prefixToken, replaced));
return(true);
}