private int GetRuleSpacesOrIndentation(
LineColumn lineColumnBeforeTrivia1, SyntaxTrivia trivia1, LineColumn lineColumnAfterTrivia1, LineColumnDelta existingWhitespaceBetween, SyntaxTrivia trivia2, LineColumnRule rule)
{
var lineColumnAfterExistingWhitespace = lineColumnAfterTrivia1.With(existingWhitespaceBetween);
// next trivia is moved to next line or already on a new line, use indentation
if (rule.Lines > 0 || lineColumnAfterExistingWhitespace.WhitespaceOnly)
{
switch (rule.IndentationOperation)
{
case LineColumnRule.IndentationOperations.Absolute:
return(Math.Max(0, rule.Indentation));
case LineColumnRule.IndentationOperations.Default:
return(this.Context.GetBaseIndentation(trivia2.RawKind == 0 ? this.EndPosition : trivia2.SpanStart));
case LineColumnRule.IndentationOperations.Given:
return((trivia2.RawKind == 0) ? this.Spaces : Math.Max(0, this.indentation));
case LineColumnRule.IndentationOperations.Follow:
return(Math.Max(0, lineColumnBeforeTrivia1.Column));
case LineColumnRule.IndentationOperations.Preserve:
return(existingWhitespaceBetween.Spaces);
default:
throw Contract.Unreachable;
}
}
// okay, we are not on a its own line, use space information
switch (rule.SpaceOperation)
{
case LineColumnRule.SpaceOperations.Preserve:
return(Math.Max(rule.Spaces, existingWhitespaceBetween.Spaces));
case LineColumnRule.SpaceOperations.Force:
return(Math.Max(rule.Spaces, 0));
default:
throw Contract.Unreachable;
}
}
private LineColumn FormatFirstTriviaAndWhitespaceAfter <T>(
LineColumn lineColumnBeforeTrivia1,
SyntaxTrivia trivia1,
LineColumnDelta existingWhitespaceBetween,
SyntaxTrivia trivia2,
Formatter <T> format,
WhitespaceAppender <T> addWhitespaceTrivia,
List <T> changes,
CancellationToken cancellationToken)
{
var lineColumnAfterTrivia1 = trivia1.RawKind == 0 ?
lineColumnBeforeTrivia1 : lineColumnBeforeTrivia1.With(format(lineColumnBeforeTrivia1, trivia1, changes, cancellationToken));
var rule = GetOverallLineColumnRuleBetween(trivia1, existingWhitespaceBetween, trivia2);
var whitespaceDelta = Apply(lineColumnBeforeTrivia1, trivia1, lineColumnAfterTrivia1, existingWhitespaceBetween, trivia2, rule);
var span = GetTextSpan(trivia1, trivia2);
addWhitespaceTrivia(lineColumnAfterTrivia1, whitespaceDelta, span, changes);
return(lineColumnAfterTrivia1.With(whitespaceDelta));
}
protected LineColumn GetLineColumn(LineColumn lineColumn, SyntaxTrivia trivia)
{
var text = trivia.ToFullString();
return(lineColumn.With(GetLineColumnDelta(lineColumn.Column, text)));
}
private LineColumnDelta GetLineColumnOfWhitespace(
LineColumn lineColumn,
SyntaxTrivia previousTrivia,
SyntaxTrivia trivia1,
LineColumnDelta whitespaceBetween,
SyntaxTrivia trivia2)
{
Contract.Requires(IsWhitespaceOrEndOfLine(trivia2));
// treat elastic as new line as long as its previous trivia is not elastic or
// it has line break right before it
if (trivia2.IsElastic())
{
// eat up consecutive elastic trivia or next line
if (trivia1.IsElastic() || IsEndOfLine(trivia1))
{
return(LineColumnDelta.Default);
}
// if there was alrady new lines, ignore elastic
var lineColumnAfterPreviousTrivia = GetLineColumn(lineColumn, previousTrivia);
var newLineFromPreviousOperation = (whitespaceBetween.Lines > 0) ||
(lineColumnAfterPreviousTrivia.Line > 0 && lineColumnAfterPreviousTrivia.Column == 0);
if (newLineFromPreviousOperation && whitespaceBetween.WhitespaceOnly)
{
return(LineColumnDelta.Default);
}
return(new LineColumnDelta(lines: 1, spaces: 0, whitespaceOnly: true, forceUpdate: true));
}
if (IsEndOfLine(trivia2))
{
return(new LineColumnDelta(lines: 1, spaces: 0, whitespaceOnly: true, forceUpdate: false));
}
var text = trivia2.ToFullString();
return(new LineColumnDelta(
lines: 0,
spaces: text.ConvertTabToSpace(this.OptionSet.GetOption(FormattingOptions.TabSize, this.Language), lineColumn.With(whitespaceBetween).Column, text.Length),
whitespaceOnly: true,
forceUpdate: false));
}