private XSharpSignature CreateSignature(ITextBuffer textBuffer, string methodSig, string methodDoc, ITrackingSpan span, bool comma, bool isCtor)
{
XSharpProjectPackage.Instance.DisplayOutPutMessage("XSharpSignatureHelpSource.CreateSignature()");
XSharpSignature sig = new XSharpSignature(textBuffer, methodSig, methodDoc, null);
// Moved : Done in the XSharpSignature constructor
// textBuffer.Changed += new EventHandler<TextContentChangedEventArgs>(sig.OnSubjectBufferChanged);
// find the parameters in the method signature :
// MyMethod( param1 AS TYPE1, param2 AS TYPE2 ) AS TYPE3 will turn to
// 0 : MyMethod
// 1 : param1 AS TYPE1
// 2 : param2 AS TYPE2
// 3 : AS TYPE3
string[] pars;
if (isCtor)
{
pars = methodSig.Split(new char[] { '{', ',', '}' });
}
else
{
pars = methodSig.Split(new char[] { '(', ',', ')' });
}
List <IParameter> paramList = new List <IParameter>();
int locusSearchStart = 0;
// i = 1 to skip the MethodName; Length-1 to Skip the ReturnType
for (int i = 1; i < pars.Length - 1; i++)
{
string param = pars[i].Trim();
if (string.IsNullOrEmpty(param))
{
continue;
}
//find where this parameter is located in the method signature
int locusStart = methodSig.IndexOf(param, locusSearchStart);
if (locusStart >= 0)
{
Span locus = new Span(locusStart, param.Length);
locusSearchStart = locusStart + param.Length;
// paramList.Add(new XSharpParameter("Documentation for the parameter.", locus, param, sig));
paramList.Add(new XSharpParameter("", locus, param, sig));
}
}
sig.Parameters = new ReadOnlyCollection <IParameter>(paramList);
sig.ApplicableToSpan = span;
sig.ComputeCurrentParameter();
return(sig);
}
internal void ComputeCurrentParameter()
{
//the number of commas in the string is the index of the current parameter
string sigText = ApplicableToSpan.GetText(m_textBuffer.CurrentSnapshot);
int currentIndex = 0;
int commaCount = 0;
while (currentIndex < sigText.Length)
{
int commaIndex = sigText.IndexOf(',', currentIndex);
if (commaIndex == -1)
{
break;
}
commaCount++;
currentIndex = commaIndex + 1;
}
//
List <ISignature> signatures = new List <ISignature>();
foreach (ISignature sig in this.m_session.Signatures)
{
if (sig.Parameters.Count > commaCount)
{
signatures.Add(sig);
}
}
//
if (signatures.Count == 0)
{
XSharpSignature sig = this.m_session.SelectedSignature as XSharpSignature;
sig.CurrentParameter = null;
}
else
{
this.m_session.SelectedSignature = signatures[0];
XSharpSignature sig = this.m_session.SelectedSignature as XSharpSignature;
sig.CurrentParameter = signatures[0].Parameters[commaCount];
}
}