public TextSpan GetPreviousSpanFor(TextSpan span)
{
if (span.Start == 0)
return new TextSpan(span.Snapshot, 0, 0);
return GetSpanFor(span.Start - 1, span.Snapshot);
}
public TextSpan GetNextSpanFor(TextSpan span)
{
if (span.End == span.Snapshot.Length)
return new TextSpan(span.Snapshot, span.Snapshot.Length, 0);
return GetSpanFor(span.End, span.Snapshot);
}
private IClassification ClassificationFor(Token token, TextSpan textSpan)
{
switch (token.Type)
{
case TokenType.WhiteSpace:
return _standardClassificationRegistry.WhiteSpace;
case TokenType.Identifier:
return _keywords.Contains(textSpan.Text)
? _standardClassificationRegistry.Keyword
: _standardClassificationRegistry.Identifier;
case TokenType.Punctuation:
return _standardClassificationRegistry.Punctuation;
case TokenType.Number:
return _standardClassificationRegistry.Number;
case TokenType.None:
return _standardClassificationRegistry.Operator;
default:
throw new ArgumentOutOfRangeException();
}
}
public ICompletionSet CompletionsFor(TextSpan contextForCompletion)
{
return new CompletionSet(UnityScriptClassifier.Keywords.Select(kw => (ICompletion)new Completion(kw)));
}
public void StartCompletionSession(TextSpan completionSpan, ICompletionSet completions)
{
_codeView.StartCompletionSession(new CompletionSession(completionSpan, completions));
}
private ClassificationSpan Identifier(TextSpan textSpan)
{
return Identifier(textSpan.Span.Start, textSpan.Span.Length);
}
private ClassificationSpan Comment(TextSpan textSpan)
{
return new ClassificationSpan(ClassificationRegistry.Comment, textSpan);
}
public CompletionSession(TextSpan completionSpan, ICompletionSet completions)
{
_completions = completions;
}
public ICompletionSet CompletionsFor(TextSpan contextForCompletion)
{
return new CompletionSet(new Completion[0]);
}
private IEnumerable<ClassificationSpan> ClassificationsFor(TextSpan textSpan)
{
return _tokenizer.Tokenize(textSpan.Text).Select(t => ClassificationSpanFor(t, textSpan.Snapshot, textSpan.Span.Start));
}
public ClassificationSpan(IClassification classification, TextSpan span)
{
Classification = classification;
Span = span;
}
private ICompletionSet CompletionsFor(TextSpan newTextSpan)
{
return _completionProvider.CompletionsFor(newTextSpan);
}