public void AugmentSignatureHelpSession(ISignatureHelpSession session, IList<ISignature> signatures) {
VSServiceProvider.Current.Logger.PublicEntry(() => {
//Record our start time for preformance considerations
var startTime = DateTime.Now;
//Do we have signatures?
if (signatures == null || signatures.Count < 1)
return;
//Do we have a well-formed session?
if (session == null || session.TextView == null || session.TextView.TextBuffer == null)
return;
//Can we get our trigger point?
var triggerPoint = session.GetTriggerPoint(_textBuffer);
if (triggerPoint == null)
return;
//Can we get our snapshot?
var workingSnapshot = _textBuffer.CurrentSnapshot;
if (workingSnapshot == null)
return;
//Can we get our SourceFile?
var sourceFile = _textViewTracker.LatestSourceFile;
if (sourceFile == null)
return;
//Can we get our ParseTree?
var parseTree = sourceFile.GetParseTree();
if (parseTree == null)
return;
//Can we get our compilation?
var comp = _textViewTracker.LatestCompilation;
if (comp == null)
return;
//Is the model ready?
if (!VSServiceProvider.IsModelReady(parseTree) || _textViewTracker.IsLatestCompilationStale || _textViewTracker.IsLatestSourceFileStale) {
//Ask for a new model
VSServiceProvider.Current.AskForNewVSModel();
//Return a message saying we aren't ready yet
VSServiceProvider.Current.Logger.WriteToLog("The VS model is out of date! Aborting contract lookup.");
return;//"(VS isn't ready for possible contract lookup yet. Please try again in a few seconds.)";
}
string[] contractContents = null;
//Proceed cautiously
try
{
//Can we get a call node?
var callNode = IntellisenseContractsHelper.GetAnyCallNodeAboveTriggerPoint(triggerPoint, workingSnapshot, parseTree);
if (callNode == null || comp == null || sourceFile == null)
return;
//Can we get our semantic member?
var semanticMember = IntellisenseContractsHelper.GetSemanticMember(callNode, comp, sourceFile);
if (semanticMember == null)
return;
var declType = semanticMember.ContainingType;
// find all members of the same name (virt/non-virt)
var overloads = GetSignatureOverloads(declType, signatures, semanticMember);
contractContents = GetContractsForOverloads(overloads);
//Give up on our contracts if we get an exception
}
catch (IllFormedSemanticModelException)
{
return;
}
catch (InvalidOperationException e)
{
if (!e.Message.Contains(VSServiceProvider.InvalidOperationExceptionMessage_TheSnapshotIsOutOfDate))
throw e;
else
{
this._textViewTracker.IsLatestCompilationStale = true;
return;
}
}
catch (System.Runtime.InteropServices.COMException)
{
// various reasons for COMException
// - binding failed
// - project unavailable
// - ...
return;
}
//Enumerate the signatures and append our custom content
for (int i = 0; i < signatures.Count; i++) {
var sig = signatures[i];
if (contractContents != null && !String.IsNullOrEmpty(contractContents[i]))
{
signatures[i] = new SignatureWithContracts(sig, contractContents[i]);
}
}
//Print our elapsed time for preformance considerations
var elapseTime = DateTime.Now - startTime;
VSServiceProvider.Current.Logger.WriteToLog("Time to compute quickinfo: " + elapseTime.Milliseconds + "ms");
}, "AugmentSignatureHelpSession");
}
public void AugmentSignatureHelpSession(ISignatureHelpSession session, IList <ISignature> signatures)
{
ContractsPackageAccessor.Current.Logger.PublicEntry(() => {
//Record our start time for preformance considerations
var startTime = DateTime.Now;
//Do we have signatures?
if (signatures == null || signatures.Count < 1)
{
return;
}
//Do we have a well-formed session?
if (session == null || session.TextView == null || session.TextView.TextBuffer == null)
{
return;
}
//Can we get our trigger point?
var triggerPoint = session.GetTriggerPoint(_textBuffer);
if (triggerPoint == null)
{
return;
}
//Can we get our snapshot?
var workingSnapshot = _textBuffer.CurrentSnapshot;
if (workingSnapshot == null)
{
return;
}
//Can we get our SourceFile?
var sourceFile = _textViewTracker.LatestSourceFile;
if (sourceFile == null)
{
return;
}
//Can we get our ParseTree?
var parseTree = sourceFile.GetParseTree();
if (parseTree == null)
{
return;
}
//Can we get our compilation?
var comp = _textViewTracker.LatestCompilation;
if (comp == null)
{
return;
}
//Is the model ready?
if (!parseTree.IsModelReady() || _textViewTracker.IsLatestCompilationStale || _textViewTracker.IsLatestSourceFileStale)
{
//Ask for a new model
ContractsPackageAccessor.Current.AskForNewVSModel(_textBuffer);
//Return a message saying we aren't ready yet
ContractsPackageAccessor.Current.Logger.WriteToLog("The VS model is out of date! Aborting contract lookup.");
return;//"(VS isn't ready for possible contract lookup yet. Please try again in a few seconds.)";
}
string[] contractContents = null;
//Proceed cautiously
try
{
//Can we get a call node?
var callNode = IntellisenseContractsHelper.GetAnyCallNodeAboveTriggerPoint(triggerPoint, workingSnapshot, parseTree);
if (callNode == null || comp == null || sourceFile == null)
{
return;
}
//Can we get our semantic member?
var semanticMember = IntellisenseContractsHelper.GetSemanticMember(callNode, comp, sourceFile);
if (semanticMember == null)
{
return;
}
var declType = semanticMember.ContainingType;
// find all members of the same name (virt/non-virt)
var overloads = GetSignatureOverloads(declType, signatures, semanticMember);
contractContents = GetContractsForOverloads(overloads);
//Give up on our contracts if we get an exception
}
catch (IllFormedSemanticModelException)
{
return;
}
catch (InvalidOperationException e)
{
if (!e.Message.Contains(ContractsPackageAccessor.InvalidOperationExceptionMessage_TheSnapshotIsOutOfDate))
{
throw e;
}
else
{
this._textViewTracker.IsLatestCompilationStale = true;
return;
}
}
catch (System.Runtime.InteropServices.COMException)
{
// various reasons for COMException
// - binding failed
// - project unavailable
// - ...
return;
}
//Enumerate the signatures and append our custom content
for (int i = 0; i < signatures.Count; i++)
{
var sig = signatures[i];
if (contractContents != null && !String.IsNullOrEmpty(contractContents[i]))
{
signatures[i] = new SignatureWithContracts(sig, contractContents[i]);
}
}
//Print our elapsed time for preformance considerations
var elapseTime = DateTime.Now - startTime;
ContractsPackageAccessor.Current.Logger.WriteToLog("Time to compute quickinfo: " + elapseTime.Milliseconds + "ms");
}, "AugmentSignatureHelpSession");
}