private void UpdateClassifications(CaretPosition caretPosition)
{
var bufferPosition = caretPosition.BufferPosition;
var snapshot = bufferPosition.Snapshot;
var position = bufferPosition.Position;
var oldMatchingBraces = _matchingBraces;
if (HasBraceAtPosition(snapshot, position))
{
MatchingBraces newMatchingBraces = null;
ClassificationParseResult parseResult;
if (ParseUtil.TryParse(_textBuffer, out parseResult) && snapshot.Version == parseResult.Snapshot.Version)
{
SearchMatchingBraces(parseResult.Tokens, parseResult.Snapshot, position, ref newMatchingBraces);
}
_matchingBraces = newMatchingBraces;
if (null != oldMatchingBraces)
{
NotifyTagsChanged(oldMatchingBraces);
}
if (null != newMatchingBraces)
{
NotifyTagsChanged(newMatchingBraces);
}
}
else if (oldMatchingBraces != null)
{
_matchingBraces = null;
NotifyTagsChanged(oldMatchingBraces);
}
}
private static void AddMatchingBraces(ITextSnapshot snapshot, int openBrace, int closeBrace, ref MatchingBraces matchingBraces)
{
if (null == matchingBraces)
{
matchingBraces = new MatchingBraces(snapshot, new List <Span>(4));
}
matchingBraces.Item2.Add(new Span(openBrace, 1));
matchingBraces.Item2.Add(new Span(closeBrace, 1));
}
private void NotifyTagsChanged(MatchingBraces matchingBraces)
{
var handler = TagsChanged;
if (handler != null)
{
foreach (var x in matchingBraces.Item2)
{
handler(this, new SnapshotSpanEventArgs(new SnapshotSpan(matchingBraces.Item1, x)));
}
}
}
private static void TryAddMatchingBraces(ITextSnapshot snapshot, int caretPos, ref MatchingBraces matchingBraces, Span tokenSpan, object closeBrace)
{
if (IsMatchingBraces(caretPos, tokenSpan, closeBrace))
{
AddMatchingBraces(snapshot, tokenSpan.Start, tokenSpan.End - 1, ref matchingBraces);
}
}
private static void SearchMatchingBraces(Token token, ITextSnapshot snapshot, int caretPos, ref MatchingBraces matchingBraces)
{
for (; token != null; token = token.Next)
{
var tokenSpan = Utils.NLocationToSpan(snapshot, token.Location);
if (tokenSpan.End < caretPos)
{
continue;
}
if (caretPos < tokenSpan.Start)
{
break;
}
if (token is Token.BracesGroup)
{
var groupToken = (Token.BracesGroup)token;
TryAddMatchingBraces(snapshot, caretPos, ref matchingBraces, tokenSpan, groupToken.CloseBrace);
SearchMatchingBraces(groupToken.Child, snapshot, caretPos, ref matchingBraces);
}
else if (token is Token.RoundGroup)
{
var groupToken = (Token.RoundGroup)token;
TryAddMatchingBraces(snapshot, caretPos, ref matchingBraces, tokenSpan, groupToken.CloseBrace);
SearchMatchingBraces(groupToken.Child, snapshot, caretPos, ref matchingBraces);
}
else if (token is Token.SquareGroup)
{
var groupToken = (Token.SquareGroup)token;
TryAddMatchingBraces(snapshot, caretPos, ref matchingBraces, tokenSpan, groupToken.CloseBrace);
SearchMatchingBraces(groupToken.Child, snapshot, caretPos, ref matchingBraces);
}
else if (token is Token.LooseGroup)
{
var groupToken = (Token.LooseGroup)token;
SearchMatchingBraces(groupToken.Child, snapshot, caretPos, ref matchingBraces);
}
else if (token is Token.QuoteGroup)
{
var groupToken = (Token.QuoteGroup)token;
SearchMatchingBraces(groupToken.Child, snapshot, caretPos, ref matchingBraces);
}
else if (token is Token.Namespace)
{
var nsToken = (Token.Namespace)token;
SearchMatchingBraces(nsToken.KeywordToken, snapshot, caretPos, ref matchingBraces);
SearchMatchingBraces(nsToken.Body, snapshot, caretPos, ref matchingBraces);
}
else if (token is Token.Using)
{
var nsToken = (Token.Using)token;
SearchMatchingBraces(nsToken.KeywordToken, snapshot, caretPos, ref matchingBraces);
SearchMatchingBraces(nsToken.Body, snapshot, caretPos, ref matchingBraces);
}
}
}
