public sealed override bool ShouldTriggerCompletion(SourceText text, int caretPosition, CompletionTrigger trigger, OptionSet options)
{
var lineStart = text.Lines.GetLineFromPosition(caretPosition).Start;
// check if the line starts with {whitespace}#{whitespace}{DirectiveName}{whitespace}"
var poundIndex = text.IndexOfNonWhiteSpace(lineStart, caretPosition - lineStart);
if (poundIndex == -1 || text[poundIndex] != '#')
{
return(false);
}
var directiveNameStartIndex = text.IndexOfNonWhiteSpace(poundIndex + 1, caretPosition - poundIndex - 1);
if (directiveNameStartIndex == -1 || !text.ContentEquals(directiveNameStartIndex, DirectiveName))
{
return(false);
}
var directiveNameEndIndex = directiveNameStartIndex + DirectiveName.Length;
var quoteIndex = text.IndexOfNonWhiteSpace(directiveNameEndIndex, caretPosition - directiveNameEndIndex);
if (quoteIndex == -1 || text[quoteIndex] != '"')
{
return(false);
}
return(true);
}
public static IReadOnlyList <TextChange> GetMinimalTextChanges(SourceText oldText, SourceText newText, bool lineDiffOnly = true)
{
if (oldText is null)
{
throw new ArgumentNullException(nameof(oldText));
}
if (newText is null)
{
throw new ArgumentNullException(nameof(newText));
}
if (oldText.ContentEquals(newText))
{
return(Array.Empty <TextChange>());
}
else if (oldText.Length == 0 || newText.Length == 0)
{
return(newText.GetTextChanges(oldText));
}
var differ = new SourceTextDiffer(oldText, newText, lineDiffOnly);
var edits = differ.ComputeDiff();
var changes = differ.ProcessChanges(edits);
Debug.Assert(oldText.WithChanges(changes).ContentEquals(newText), "Incorrect minimal changes");
return(changes);
}
private static TextAndVersion GetProperTextAndVersion(SourceText oldText, SourceText newText, VersionStamp version, string filePath)
{
// if the supplied text is the same as the previous text, then also use same version
// otherwise use new version
return(oldText.ContentEquals(newText)
? TextAndVersion.Create(newText, version, filePath)
: TextAndVersion.Create(newText, version.GetNewerVersion(), filePath));
}
protected override bool ContentEqualsImpl(SourceText other)
{
var otherChecksum = other as ChecksumSourceText;
if (otherChecksum != null)
{
return(Checksum == otherChecksum.Checksum);
}
return(_sourceText.ContentEquals(other));
}
public override void PublishHtml(string filePath, SourceText sourceText, long hostDocumentVersion)
{
if (filePath is null)
{
throw new ArgumentNullException(nameof(filePath));
}
if (sourceText is null)
{
throw new ArgumentNullException(nameof(sourceText));
}
_foregroundDispatcher.AssertForegroundThread();
if (!_publishedHtmlData.TryGetValue(filePath, out var previouslyPublishedData))
{
previouslyPublishedData = PublishData.Default;
}
IReadOnlyList <TextChange> textChanges = Array.Empty <TextChange>();
if (!sourceText.ContentEquals(previouslyPublishedData.SourceText))
{
textChanges = sourceText.GetTextChanges(previouslyPublishedData.SourceText);
}
else if (hostDocumentVersion == previouslyPublishedData.HostDocumentVersion)
{
// Source texts match along with host document versions. We've already published something that looks like this. No-op.
return;
}
_publishedHtmlData[filePath] = new PublishData(sourceText, hostDocumentVersion);
var request = new UpdateBufferRequest()
{
HostDocumentFilePath = filePath,
Changes = textChanges,
HostDocumentVersion = hostDocumentVersion,
};
_server.Value.Client.SendRequest(LanguageServerConstants.RazorUpdateHtmlBufferEndpoint, request);
}
public static void DoVsCodeHack(string relatedDirectory, string fileName, SourceText sourceText)
{
try
{
var filePath = Path.Combine(relatedDirectory, fileName);
if (File.Exists(filePath))
{
var fileText = File.ReadAllText(filePath);
var sourceFileText = SourceText.From(fileText, Encoding.UTF8);
if (sourceText.ContentEquals(sourceFileText))
{
return;
}
}
using var writer = new StreamWriter(filePath);
sourceText.Write(writer);
}
catch (Exception)
{
return; // We don't really care if the VSCode hack fails.
}
}
public override void Publish(string filePath, SourceText sourceText, long hostDocumentVersion)
{
if (filePath is null)
{
throw new ArgumentNullException(nameof(filePath));
}
if (sourceText is null)
{
throw new ArgumentNullException(nameof(sourceText));
}
_foregroundDispatcher.AssertForegroundThread();
if (!_publishedSourceText.TryGetValue(filePath, out var previouslyPublishedText))
{
previouslyPublishedText = EmptySourceText;
}
IReadOnlyList <TextChange> textChanges = Array.Empty <TextChange>();
if (!sourceText.ContentEquals(previouslyPublishedText))
{
textChanges = sourceText.GetTextChanges(previouslyPublishedText);
}
_publishedSourceText[filePath] = sourceText;
var request = new UpdateCSharpBufferRequest()
{
HostDocumentFilePath = filePath,
Changes = textChanges,
HostDocumentVersion = hostDocumentVersion,
};
_server.Value.Client.SendRequest("updateCSharpBuffer", request);
}
protected override bool ContentEqualsImpl(SourceText other) => _sourceText.ContentEquals(other);