public static int GetInsertionIndex <TDeclaration>(
SyntaxList <TDeclaration> declarationList,
TDeclaration declaration,
CodeGenerationOptions options,
IList <bool> availableIndices,
IComparer <TDeclaration> comparerWithoutNameCheck,
IComparer <TDeclaration> comparerWithNameCheck,
Func <SyntaxList <TDeclaration>, TDeclaration> after = null,
Func <SyntaxList <TDeclaration>, TDeclaration> before = null)
where TDeclaration : SyntaxNode
{
Contract.ThrowIfTrue(availableIndices != null && availableIndices.Count != declarationList.Count + 1);
if (options != null)
{
// Try to strictly obey the after option by inserting immediately after the member containing the location
if (options.AfterThisLocation != null)
{
var afterMember = declarationList.LastOrDefault(m => m.SpanStart <= options.AfterThisLocation.SourceSpan.Start);
if (afterMember != null)
{
var index = declarationList.IndexOf(afterMember);
index = GetPreferredIndex(index + 1, availableIndices, forward: true);
if (index != -1)
{
return(index);
}
}
}
// Try to strictly obey the before option by inserting immediately before the member containing the location
if (options.BeforeThisLocation != null)
{
var beforeMember = declarationList.FirstOrDefault(m => m.Span.End >= options.BeforeThisLocation.SourceSpan.End);
if (beforeMember != null)
{
var index = declarationList.IndexOf(beforeMember);
index = GetPreferredIndex(index, availableIndices, forward: false);
if (index != -1)
{
return(index);
}
}
}
if (options.AutoInsertionLocation)
{
if (declarationList.IsEmpty())
{
return(0);
}
var desiredIndex = TryGetDesiredIndexIfGrouped(
declarationList, declaration, availableIndices,
comparerWithoutNameCheck, comparerWithNameCheck);
if (desiredIndex.HasValue)
{
return(desiredIndex.Value);
}
if (after != null)
{
var member = after(declarationList);
if (member != null)
{
var index = declarationList.IndexOf(member);
if (index >= 0)
{
index = GetPreferredIndex(index + 1, availableIndices, forward: true);
if (index != -1)
{
return(index);
}
}
}
}
if (before != null)
{
var member = before(declarationList);
if (member != null)
{
var index = declarationList.IndexOf(member);
if (index >= 0)
{
index = GetPreferredIndex(index, availableIndices, forward: false);
if (index != -1)
{
return(index);
}
}
}
}
}
}
// Otherwise, add the declaration to the end.
{
var index = GetPreferredIndex(declarationList.Count, availableIndices, forward: false);
if (index != -1)
{
return(index);
}
}
return(declarationList.Count);
}
protected static int GetInsertionIndex <TDeclaration>(
SyntaxList <TDeclaration> declarationList,
TDeclaration declaration,
CodeGenerationOptions options,
IList <bool> availableIndices,
Func <SyntaxList <TDeclaration>, TDeclaration> after = null,
Func <SyntaxList <TDeclaration>, TDeclaration> before = null)
where TDeclaration : SyntaxNode
{
Contract.ThrowIfTrue(availableIndices != null && availableIndices.Count != declarationList.Count + 1);
if (options != null)
{
// Try to strictly obey the after option by inserting immediately after the member containing the location
if (options.AfterThisLocation != null)
{
var afterMember = declarationList.LastOrDefault(m => m.SpanStart <= options.AfterThisLocation.SourceSpan.Start);
if (afterMember != null)
{
var index = declarationList.IndexOf(afterMember);
index = GetPreferredIndex(index + 1, availableIndices, forward: true);
if (index != -1)
{
return(index);
}
}
}
// Try to strictly obey the before option by inserting immediately before the member containing the location
if (options.BeforeThisLocation != null)
{
var beforeMember = declarationList.FirstOrDefault(m => m.Span.End >= options.BeforeThisLocation.SourceSpan.End);
if (beforeMember != null)
{
var index = declarationList.IndexOf(beforeMember);
index = GetPreferredIndex(index, availableIndices, forward: false);
if (index != -1)
{
return(index);
}
}
}
if (options.AutoInsertionLocation)
{
if (declarationList.IsEmpty())
{
return(0);
}
else if (declarationList.IsSorted(CSharpDeclarationComparer.Instance))
{
var result = Array.BinarySearch(declarationList.ToArray(), declaration, CSharpDeclarationComparer.Instance);
var index = GetPreferredIndex(result < 0 ? ~result : result, availableIndices, forward: true);
if (index != -1)
{
return(index);
}
}
if (after != null)
{
var member = after(declarationList);
if (member != null)
{
var index = declarationList.IndexOf(member);
if (index >= 0)
{
index = GetPreferredIndex(index + 1, availableIndices, forward: true);
if (index != -1)
{
return(index);
}
}
}
}
if (before != null)
{
var member = before(declarationList);
if (member != null)
{
var index = declarationList.IndexOf(member);
if (index >= 0)
{
index = GetPreferredIndex(index, availableIndices, forward: false);
if (index != -1)
{
return(index);
}
}
}
}
}
}
// Otherwise, add the declaration to the end.
{
var index = GetPreferredIndex(declarationList.Count, availableIndices, forward: false);
if (index != -1)
{
return(index);
}
}
return(declarationList.Count);
}
