internal void ComputeCurrentParameter()
{
//the number of commas in the string is the index of the current parameter
string sigText = ApplicableToSpan.GetText(m_textBuffer.CurrentSnapshot);
var commaCount = XSharpVsSignature.CalculateCommaPosition(sigText, sigText.Length, m_textBuffer);
//
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)
{
var sig = this.m_session.SelectedSignature as XSharpVsSignature;
sig.CurrentParameter = null;
}
else
{
this.m_session.SelectedSignature = signatures[0];
var sig = this.m_session.SelectedSignature as XSharpVsSignature;
sig.CurrentParameter = signatures[0].Parameters[commaCount];
}
}
private XSharpVsSignature CreateSignature(ITextBuffer textBuffer, IXMemberSymbol member, string methodSig, ITrackingSpan span, bool isCtor, XFile file)
{
var doc = "";
string returns;
string remarks;
if (member != null)
{
doc = XSharpXMLDocMember.GetMemberSummary(member, file.Project, out returns, out remarks);
}
Debug($"XSharpSignatureHelpSource.CreateSignature( {methodSig})");
var sig = new XSharpVsSignature(textBuffer, methodSig, doc, null);
var names = new List <string>();
var descriptions = new List <string>();
if (member != null)
{
XSharpXMLDocMember.GetMemberParameters(member, file.Project, names, descriptions);
}
// 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
var 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
while (names.Count < pars.Length)
{
names.Add("");
descriptions.Add("");
}
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));
if (!string.IsNullOrEmpty(names[i - 1]))
{
param = names[i - 1];
}
paramList.Add(new XSharpVsParameter(descriptions[i - 1], locus, param, sig));
}
}
sig.Parameters = new ReadOnlyCollection <IParameter>(paramList);
sig.ApplicableToSpan = span;
sig.ComputeCurrentParameter();
return(sig);
}