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 int GetRuleLines(LineColumnRule rule, LineColumn lineColumnAfterTrivia1, LineColumnDelta existingWhitespaceBetween)
{
var adjustedRuleLines = Math.Max(0, rule.Lines - GetTrailingLinesAtEndOfTrivia1(lineColumnAfterTrivia1));
return((rule.LineOperation == LineColumnRule.LineOperations.Preserve) ? Math.Max(adjustedRuleLines, existingWhitespaceBetween.Lines) : adjustedRuleLines);
}
private LineColumnDelta Apply(
LineColumn lineColumnBeforeTrivia1, SyntaxTrivia trivia1, LineColumn lineColumnAfterTrivia1, LineColumnDelta existingWhitespaceBetween, SyntaxTrivia trivia2, LineColumnRule rule)
{
// we do not touch spaces adjacent to missing token
// [missing token] [whitespace] [trivia] or [trivia] [whitepsace] [missing token] case
if ((this.Token1.IsMissing && trivia1.RawKind == 0) ||
(trivia2.RawKind == 0 && this.Token2.IsMissing))
{
// leave things as it is
return(existingWhitespaceBetween);
}
var lines = GetRuleLines(rule, lineColumnAfterTrivia1, existingWhitespaceBetween);
var spaceOrIndentations = GetRuleSpacesOrIndentation(lineColumnBeforeTrivia1, trivia1, lineColumnAfterTrivia1, existingWhitespaceBetween, trivia2, rule);
return(new LineColumnDelta(
lines,
spaceOrIndentations,
whitespaceOnly: true,
forceUpdate: existingWhitespaceBetween.ForceUpdate));
}