/// <summary>
/// Rewrites the specified trivia to include the specified number of trailing
/// line breaks and spaces, as well as any other additional trivia which are
/// deemed to be required.
/// </summary>
private static SyntaxNode RewriteTrivia(SyntaxNode trivia,
Int32 neededLineBreaks, Int32 neededSpaces, Int32 indentation)
{
var needsLineBreakAfterExistingTrivia = false;
var needsSpaceAfterExistingTrivia = false;
if (trivia != null)
{
if (trivia.IsList)
{
for (int i = 0; i < trivia.SlotCount; i++)
{
var item = trivia.GetSlot(i) as SyntaxTrivia;
var itemIsLast = (i + 1 == trivia.SlotCount);
EvaluateTriviaForRewrite(item,
ref needsLineBreakAfterExistingTrivia, ref needsSpaceAfterExistingTrivia, itemIsLast);
}
}
else
{
EvaluateTriviaForRewrite(trivia as SyntaxTrivia,
ref needsLineBreakAfterExistingTrivia, ref needsSpaceAfterExistingTrivia, true);
}
}
var triviaList = default(SyntaxList <SyntaxTrivia>);
var triviaListBuilder = default(SyntaxListBuilder <SyntaxTrivia>);
var triviaChanged =
needsLineBreakAfterExistingTrivia ||
needsSpaceAfterExistingTrivia ||
neededLineBreaks > 0 ||
neededSpaces > 0;
if (triviaChanged)
{
triviaListBuilder = SyntaxListBuilder <SyntaxTrivia> .Create();
if (trivia != null)
{
triviaList = new SyntaxList <SyntaxTrivia>(trivia);
triviaListBuilder.AddRange(triviaList);
}
if (needsLineBreakAfterExistingTrivia)
{
triviaListBuilder.Add(GetLineBreakTrivia(1, indentation));
neededLineBreaks--;
neededSpaces--;
}
else
{
if (needsSpaceAfterExistingTrivia)
{
triviaListBuilder.Add(GetSpaceTrivia(1));
neededSpaces--;
}
}
if (neededLineBreaks > 0)
{
triviaListBuilder.Add(GetLineBreakTrivia(neededLineBreaks, indentation));
}
else
{
if (neededSpaces > 0)
{
triviaListBuilder.Add(GetSpaceTrivia(neededSpaces));
}
}
}
return(triviaListBuilder.IsNull ? trivia : triviaListBuilder.ToListNode());
}
/// <summary>
/// Initializes a new instance of the <see cref="SyntaxListBuilder{TNode}"/> structure
/// from the specified <see cref="SyntaxListBuilder"/> instance.
/// </summary>
/// <param name="builder">The <see cref="SyntaxListBuilder"/> which is encapsulated by this instance.</param>
public SyntaxListBuilder(SyntaxListBuilder builder)
{
this.builder = builder;
}
/// <summary>
/// Initializes a new instance of the <see cref="SeparatedSyntaxListBuilder{TNode}"/> structure
/// from the specified <see cref="SyntaxListBuilder"/> instance.
/// </summary>
/// <param name="builder">The <see cref="SyntaxListBuilder"/> which is encapsulated by this instance.</param>
public SeparatedSyntaxListBuilder(SyntaxListBuilder builder)
{
this.builder = builder;
}
