public IEnumerable <ITagSpan <IClassificationTag> > GetTags(NormalizedSnapshotSpanCollection spans)
{
foreach (SnapshotSpan span in spans)
{
for (int line = span.Snapshot.GetLineNumberFromPosition(span.Start.Position); line <= span.Snapshot.GetLineNumberFromPosition(span.End.Position); line++)
{
ITextSnapshotLine l = span.Snapshot.GetLineFromLineNumber(line);
/*List<Token> tokens = Lexer.Lex(l.GetText(), true);
* foreach (Token t in tokens)
* {
* yield return new TagSpan<IClassificationTag>(new SnapshotSpan(span.Snapshot, l.Start.Position + t.StartIndex, t.Length), ClassifyToken(t));
* }*/
List <SAGESharp.LSS.Token> tokens = SAGESharp.LSS.Scanner.Scan(l.GetText(), "", new List <SAGESharp.LSS.SyntaxError>(), false, false);
SAGESharp.LSS.Token previousToken = null;
foreach (SAGESharp.LSS.Token t in tokens)
{
IClassificationTag tag = ClassifyToken(t, previousToken);
if (tag != null)
{
yield return(new TagSpan <IClassificationTag>(new SnapshotSpan(span.Snapshot, l.Start.Position + (int)t.Span.Start.Offset, (int)t.Span.Length), tag));
}
if (t.Type != SAGESharp.LSS.TokenType.Comment && t.Type != SAGESharp.LSS.TokenType.MultilineComment && t.Type != SAGESharp.LSS.TokenType.Whitespace)
{
previousToken = t;
}
}
}
}
}
private void Apply()
{
Regions.Clear();
List <SAGESharp.LSS.Token> tokens = SAGESharp.LSS.Scanner.Scan(Snapshot.GetText(), "", new List <SyntaxError>(), true, true);
Stack <SAGESharp.LSS.Token> stack = new Stack <SAGESharp.LSS.Token>();
foreach (SAGESharp.LSS.Token token in tokens)
{
if (token.Type == SAGESharp.LSS.TokenType.OpenBrace)
{
stack.Push(token);
}
else if (token.Type == SAGESharp.LSS.TokenType.CloseBrace && stack.Count > 0)
{
SAGESharp.LSS.Token start = stack.Pop();
Regions.Add(new FoldRegion((int)start.Span.Start.Offset, (int)(token.Span.End - start.Span.Start.Offset), "...", ""));
}
}
Regions.Reverse();
this.TagsChanged?.Invoke(this, new SnapshotSpanEventArgs(new SnapshotSpan(Snapshot, new Span(0, Snapshot.Length))));
}
private IClassificationTag ClassifyToken(SAGESharp.LSS.Token token, SAGESharp.LSS.Token previousToken)
{
IClassificationType classification = null;
if (token.Type == SAGESharp.LSS.TokenType.Comment ||
token.Type == SAGESharp.LSS.TokenType.MultilineComment)
{
classification = StandardClassifications.Comment;
}
else if (token.Type == SAGESharp.LSS.TokenType.StringLiteral)
{
classification = StandardClassifications.StringLiteral;
}
else if (token.Type == SAGESharp.LSS.TokenType.Whitespace)
{
classification = StandardClassifications.WhiteSpace;
}
else if (token.Type == SAGESharp.LSS.TokenType.IntegerLiteral ||
token.Type == SAGESharp.LSS.TokenType.FloatLiteral)
{
classification = StandardClassifications.NumberLiteral;
}
else if (token.Type >= SAGESharp.LSS.TokenType.KeywordClass &&
token.Type <= SAGESharp.LSS.TokenType.KeywordClassID)
{
classification = StandardClassifications.Keyword;
}
else if (token.Type == SAGESharp.LSS.TokenType.Symbol &&
(previousToken?.Type == SAGESharp.LSS.TokenType.KeywordClass ||
previousToken?.Type == SAGESharp.LSS.TokenType.KeywordNew))
{
classification = ClassificationRegistry.GetClassificationType("type"); // "class name", "type"
}
else if (token.Type == SAGESharp.LSS.TokenType.Symbol &&
previousToken?.Type == SAGESharp.LSS.TokenType.Period)
{
classification = StandardClassifications.NumberLiteral;
}
else if ((token.Type >= SAGESharp.LSS.TokenType.Period &&
token.Type <= SAGESharp.LSS.TokenType.ColonColonDollarSign) ||
(token.Type >= SAGESharp.LSS.TokenType.Exclamation &&
token.Type <= SAGESharp.LSS.TokenType.LessEquals))
{
classification = StandardClassifications.Operator;
}
return(classification == null ? null : new ClassificationTag(classification));
}
