public void AugmentQuickInfoSession(IQuickInfoSession session, IList <object> quickInfoContent, out ITrackingSpan applicableToSpan)
{
applicableToSpan = null;
if (session == null || quickInfoContent == null)
{
return;
}
if (session.TextView.TextBuffer == this.TextBuffer)
{
ITextSnapshot currentSnapshot = this.TextBuffer.CurrentSnapshot;
SnapshotPoint?triggerPoint = session.GetTriggerPoint(currentSnapshot);
if (!triggerPoint.HasValue)
{
return;
}
#region experimental
/* use the experimental model to locate and process the expression */
Stopwatch stopwatch = Stopwatch.StartNew();
// lex the entire document
var input = new SnapshotCharStream(currentSnapshot, new Span(0, currentSnapshot.Length));
var lexer = new GoLexer(input);
var tokenSource = new GoSemicolonInsertionTokenSource(lexer);
var tokens = new CommonTokenStream(tokenSource);
tokens.Fill();
// locate the last token before the trigger point
while (true)
{
IToken nextToken = tokens.LT(1);
if (nextToken.Type == CharStreamConstants.EndOfFile)
{
break;
}
if (nextToken.StartIndex > triggerPoint.Value.Position)
{
break;
}
tokens.Consume();
}
switch (tokens.LA(-1))
{
case GoLexer.IDENTIFIER:
//case GoLexer.KW_THIS:
//case GoLexer.KW_UNIV:
//case GoLexer.KW_IDEN:
//case GoLexer.KW_INT2:
//case GoLexer.KW_SEQINT:
break;
default:
return;
}
Network network = NetworkBuilder <GoSimplifiedAtnBuilder> .GetOrBuildNetwork();
RuleBinding memberSelectRule = network.GetRule(GoSimplifiedAtnBuilder.RuleNames.PrimaryExpr);
#if false
HashSet <Transition> memberSelectTransitions = new HashSet <Transition>();
GetReachableTransitions(memberSelectRule, memberSelectTransitions);
#endif
NetworkInterpreter interpreter = new NetworkInterpreter(network, tokens);
interpreter.BoundaryRules.Add(memberSelectRule);
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.Label));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.TypeSwitchGuard));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.FieldName));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.Receiver));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.FunctionDecl));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.BaseTypeName));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.TypeSpec));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.IdentifierList));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.MethodName));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.ParameterDecl));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.FieldIdentifierList));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.PackageName));
interpreter.BoundaryRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.TypeName));
interpreter.ExcludedStartRules.Add(network.GetRule(GoSimplifiedAtnBuilder.RuleNames.Block));
while (interpreter.TryStepBackward())
{
if (interpreter.Contexts.Count == 0)
{
break;
}
/* we want all traces to start outside the binOpExpr18 rule, which means all
* traces with a transition reachable from binOpExpr18 should contain a push
* transition with binOpExpr18's start state as its target.
*/
if (interpreter.Contexts.All(context => context.BoundedStart))
{
break;
}
}
interpreter.CombineBoundedStartContexts();
IOutputWindowPane pane = Provider.OutputWindowService.TryGetPane(PredefinedOutputWindowPanes.TvlIntellisense);
if (pane != null)
{
pane.WriteLine(string.Format("Located {0} QuickInfo expression(s) in {1}ms.", interpreter.Contexts.Count, stopwatch.ElapsedMilliseconds));
}
HashSet <string> finalResult = new HashSet <string>();
SnapshotSpan? contextSpan = null;
foreach (var context in interpreter.Contexts)
{
Span?span = null;
//List<string> results = AnalyzeInterpreterTrace(context, memberSelectRule, out span);
foreach (var transition in context.Transitions)
{
if (!transition.Transition.IsMatch)
{
continue;
}
IToken token = transition.Token;
Span tokenSpan = new Span(token.StartIndex, token.StopIndex - token.StartIndex + 1);
if (span == null)
{
span = tokenSpan;
}
else
{
span = Span.FromBounds(Math.Min(span.Value.Start, tokenSpan.Start), Math.Max(span.Value.End, tokenSpan.End));
}
}
if (span.HasValue && !span.Value.IsEmpty)
{
contextSpan = new SnapshotSpan(currentSnapshot, span.Value);
}
//if (results.Count > 0)
//{
// finalResult.UnionWith(results);
// applicableToSpan = currentSnapshot.CreateTrackingSpan(span, SpanTrackingMode.EdgeExclusive);
//}
}
foreach (var result in finalResult)
{
quickInfoContent.Add(result);
}
#endregion
#if false
var selection = session.TextView.Selection.StreamSelectionSpan;
if (selection.IsEmpty || !selection.Contains(new VirtualSnapshotPoint(triggerPoint.Value)))
{
SnapshotSpan?expressionSpan = Provider.IntellisenseCache.GetExpressionSpan(triggerPoint.Value);
if (expressionSpan.HasValue)
{
selection = new VirtualSnapshotSpan(expressionSpan.Value);
}
}
#endif
VirtualSnapshotSpan selection = new VirtualSnapshotSpan();
if (contextSpan.HasValue)
{
selection = new VirtualSnapshotSpan(contextSpan.Value);
}
if (!selection.IsEmpty && selection.Contains(new VirtualSnapshotPoint(triggerPoint.Value)))
{
applicableToSpan = selection.Snapshot.CreateTrackingSpan(selection.SnapshotSpan, SpanTrackingMode.EdgeExclusive);
quickInfoContent.Add(selection.GetText());
//try
//{
// Expression currentExpression = Provider.IntellisenseCache.ParseExpression(selection);
// if (currentExpression != null)
// {
// SnapshotSpan? span = currentExpression.Span;
// if (span.HasValue)
// applicableToSpan = span.Value.Snapshot.CreateTrackingSpan(span.Value, SpanTrackingMode.EdgeExclusive);
// quickInfoContent.Add(currentExpression.ToString());
// }
// else
// {
// quickInfoContent.Add("Could not parse expression.");
// }
//}
//catch (Exception ex) when (!ErrorHandler.IsCriticalException(ex))
//{
// quickInfoContent.Add(ex.Message);
//}
}
}
}
internal static void TestOutputPaneBehavior(IOutputWindowPane pane, string initialName)
{
Assert.IsNotNull(pane);
Assert.AreEqual(initialName, pane.Name);
pane.Activate();
pane.Hide();
pane.Activate();
string newName = pane.Name + " - " + Path.GetRandomFileName();
pane.Name = newName;
Assert.AreEqual(newName, pane.Name);
pane.Write("Writing text...");
pane.WriteLine(" done.");
}
protected override void ReParseImpl()
{
Stopwatch timer = Stopwatch.StartNew();
// lex the entire document to get the set of identifiers we'll need to classify
ITextSnapshot snapshot = TextBuffer.CurrentSnapshot;
var input = new SnapshotCharStream(snapshot, new Span(0, snapshot.Length));
var lexer = new GoLexer(input);
var tokenSource = new GoSemicolonInsertionTokenSource(lexer);
var tokens = new CommonTokenStream(tokenSource);
tokens.Fill();
/* easy to handle the following definitions:
* - module (name)
* - open (external symbol reference) ... as (name)
* - fact (name)?
* - assert (name)?
* - fun (ref.name | name)
* - pred (ref.name | name)
* - (name): run|check
* - sig (namelist)
* - enum (name)
* moderate to handle the following definitions:
* - decl name(s)
* harder to handle the following definitions:
*/
/* A single name follows the following keywords:
* - KW_MODULE
* - KW_OPEN
* - KW_AS
* - KW_ENUM
* - KW_FACT (name is optional)
* - KW_ASSERT (name is optional)
*/
List <IToken> nameKeywords = new List <IToken>();
List <IToken> declColons = new List <IToken>();
List <IToken> identifiers = new List <IToken>();
while (tokens.LA(1) != CharStreamConstants.EndOfFile)
{
switch (tokens.LA(1))
{
case GoLexer.IDENTIFIER:
identifiers.Add(tokens.LT(1));
break;
case GoLexer.KW_PACKAGE:
case GoLexer.KW_IMPORT:
case GoLexer.KW_TYPE:
case GoLexer.KW_VAR:
case GoLexer.KW_FUNC:
case GoLexer.KW_CONST:
//case GoLexer.KW_MODULE:
//case GoLexer.KW_OPEN:
//case GoLexer.KW_AS:
//case GoLexer.KW_ENUM:
//case GoLexer.KW_FACT:
//case GoLexer.KW_ASSERT:
//case GoLexer.KW_RUN:
//case GoLexer.KW_CHECK:
//case GoLexer.KW_EXTENDS:
//case GoLexer.KW_FUN:
//case GoLexer.KW_PRED:
//case GoLexer.KW_SIG:
nameKeywords.Add(tokens.LT(1));
break;
case GoLexer.DEFEQ:
case GoLexer.COLON:
declColons.Add(tokens.LT(1));
break;
case CharStreamConstants.EndOfFile:
goto doneLexing;
default:
break;
}
tokens.Consume();
}
doneLexing:
HashSet <IToken> definitions = new HashSet <IToken>(TokenIndexEqualityComparer.Default);
HashSet <IToken> references = new HashSet <IToken>(TokenIndexEqualityComparer.Default);
foreach (var token in nameKeywords)
{
tokens.Seek(token.TokenIndex);
NetworkInterpreter interpreter = CreateTopLevelNetworkInterpreter(tokens);
while (interpreter.TryStepForward())
{
if (interpreter.Contexts.Count == 0 || interpreter.Contexts.Count > 400)
{
break;
}
if (interpreter.Contexts.All(context => context.BoundedEnd))
{
break;
}
}
interpreter.CombineBoundedEndContexts();
foreach (var context in interpreter.Contexts)
{
foreach (var transition in context.Transitions)
{
if (!transition.Symbol.HasValue)
{
continue;
}
switch (transition.Symbol)
{
case GoLexer.IDENTIFIER:
//case GoLexer.KW_THIS:
RuleBinding rule = interpreter.Network.StateRules[transition.Transition.TargetState.Id];
if (rule.Name == GoSimplifiedAtnBuilder.RuleNames.SymbolReferenceIdentifier)
{
references.Add(tokens.Get(transition.TokenIndex.Value));
}
else if (rule.Name == GoSimplifiedAtnBuilder.RuleNames.SymbolDefinitionIdentifier)
{
definitions.Add(tokens.Get(transition.TokenIndex.Value));
}
break;
default:
continue;
}
}
}
}
foreach (var token in declColons)
{
tokens.Seek(token.TokenIndex);
tokens.Consume();
if (token.Type == GoLexer.COLON)
{
IToken potentialLabel = tokens.LT(-2);
if (potentialLabel.Type != GoLexer.IDENTIFIER)
{
continue;
}
}
NetworkInterpreter interpreter = CreateVarDeclarationNetworkInterpreter(tokens);
while (interpreter.TryStepBackward())
{
if (interpreter.Contexts.Count == 0 || interpreter.Contexts.Count > 400)
{
break;
}
if (interpreter.Contexts.All(context => context.BoundedStart))
{
break;
}
interpreter.Contexts.RemoveAll(i => !IsConsistentWithPreviousResult(i, true, definitions, references));
}
interpreter.CombineBoundedStartContexts();
if (!AllAgree(interpreter.Contexts))
{
while (interpreter.TryStepForward())
{
if (interpreter.Contexts.Count == 0 || interpreter.Contexts.Count > 400)
{
break;
}
if (interpreter.Contexts.All(context => context.BoundedEnd))
{
break;
}
interpreter.Contexts.RemoveAll(i => !IsConsistentWithPreviousResult(i, false, definitions, references));
}
interpreter.CombineBoundedEndContexts();
}
foreach (var context in interpreter.Contexts)
{
foreach (var transition in context.Transitions)
{
if (!transition.Symbol.HasValue)
{
continue;
}
switch (transition.Symbol)
{
case GoLexer.IDENTIFIER:
//case GoLexer.KW_THIS:
RuleBinding rule = interpreter.Network.StateRules[transition.Transition.TargetState.Id];
if (rule.Name == GoSimplifiedAtnBuilder.RuleNames.SymbolReferenceIdentifier)
{
references.Add(tokens.Get(transition.TokenIndex.Value));
}
else if (rule.Name == GoSimplifiedAtnBuilder.RuleNames.SymbolDefinitionIdentifier)
{
definitions.Add(tokens.Get(transition.TokenIndex.Value));
}
break;
default:
continue;
}
}
}
}
#if false
foreach (var token in identifiers)
{
if (definitions.Contains(token) || references.Contains(token))
{
continue;
}
tokens.Seek(token.TokenIndex);
tokens.Consume();
NetworkInterpreter interpreter = CreateFullNetworkInterpreter(tokens);
while (interpreter.TryStepBackward())
{
if (interpreter.Contexts.Count == 0 || interpreter.Contexts.Count > 400)
{
break;
}
if (interpreter.Contexts.All(context => context.BoundedStart))
{
break;
}
interpreter.Contexts.RemoveAll(i => !IsConsistentWithPreviousResult(i, true, definitions, references));
if (AllAgree(interpreter.Contexts))
{
break;
}
}
interpreter.CombineBoundedStartContexts();
while (interpreter.TryStepForward())
{
if (interpreter.Contexts.Count == 0 || interpreter.Contexts.Count > 400)
{
break;
}
if (interpreter.Contexts.All(context => context.BoundedEnd))
{
break;
}
interpreter.Contexts.RemoveAll(i => !IsConsistentWithPreviousResult(i, false, definitions, references));
if (AllAgree(interpreter.Contexts))
{
break;
}
}
interpreter.CombineBoundedEndContexts();
foreach (var context in interpreter.Contexts)
{
foreach (var transition in context.Transitions)
{
if (!transition.Symbol.HasValue)
{
continue;
}
switch (transition.Symbol)
{
case GoLexer.IDENTIFIER:
//case GoLexer.KW_THIS:
RuleBinding rule = interpreter.Network.StateRules[transition.Transition.TargetState.Id];
if (rule.Name == GoSimplifiedAtnBuilder.RuleNames.SymbolReferenceIdentifier)
{
references.Add(tokens.Get(transition.TokenIndex.Value));
}
else if (rule.Name == GoSimplifiedAtnBuilder.RuleNames.SymbolDefinitionIdentifier)
{
definitions.Add(tokens.Get(transition.TokenIndex.Value));
}
break;
default:
continue;
}
}
}
}
#endif
// tokens which are in both the 'definitions' and 'references' sets are actually unknown.
HashSet <IToken> unknownIdentifiers = new HashSet <IToken>(definitions, TokenIndexEqualityComparer.Default);
unknownIdentifiers.IntersectWith(references);
definitions.ExceptWith(unknownIdentifiers);
#if true
references = new HashSet <IToken>(identifiers, TokenIndexEqualityComparer.Default);
references.ExceptWith(definitions);
references.ExceptWith(unknownIdentifiers);
#else
references.ExceptWith(unknownIdentifiers);
// the full set of unknown identifiers are any that aren't explicitly classified as a definition or a reference
unknownIdentifiers = new HashSet <IToken>(identifiers, TokenIndexEqualityComparer.Default);
unknownIdentifiers.ExceptWith(definitions);
unknownIdentifiers.ExceptWith(references);
#endif
List <ITagSpan <IClassificationTag> > tags = new List <ITagSpan <IClassificationTag> >();
IClassificationType definitionClassificationType = _classificationTypeRegistryService.GetClassificationType(GoSymbolTaggerClassificationTypeNames.Definition);
tags.AddRange(ClassifyTokens(snapshot, definitions, new ClassificationTag(definitionClassificationType)));
IClassificationType referenceClassificationType = _classificationTypeRegistryService.GetClassificationType(GoSymbolTaggerClassificationTypeNames.Reference);
tags.AddRange(ClassifyTokens(snapshot, references, new ClassificationTag(referenceClassificationType)));
IClassificationType unknownClassificationType = _classificationTypeRegistryService.GetClassificationType(GoSymbolTaggerClassificationTypeNames.UnknownIdentifier);
tags.AddRange(ClassifyTokens(snapshot, unknownIdentifiers, new ClassificationTag(unknownClassificationType)));
_tags = tags;
timer.Stop();
IOutputWindowPane pane = OutputWindowService.TryGetPane(PredefinedOutputWindowPanes.TvlIntellisense);
if (pane != null)
{
pane.WriteLine(string.Format("Finished classifying {0} identifiers in {1}ms: {2} definitions, {3} references, {4} unknown", identifiers.Count, timer.ElapsedMilliseconds, definitions.Count, references.Count, unknownIdentifiers.Count));
}
OnTagsChanged(new SnapshotSpanEventArgs(new SnapshotSpan(snapshot, new Span(0, snapshot.Length))));
}