/// <summary>
/// Returns the first non-whitespace position on the given line, or null if
/// the line is empty or contains only whitespace.
/// </summary>
public static int?GetFirstNonWhitespacePosition(this TextLine line)
{
var firstNonWhitespaceOffset = line.GetFirstNonWhitespaceOffset();
return(firstNonWhitespaceOffset.HasValue
? firstNonWhitespaceOffset + line.Start
: null);
}
private int GetIndentationOffsetFromLine(FormattingContext context, TextLine line)
{
var offset = line.GetFirstNonWhitespaceOffset() ?? 0;
if (!context.Options.InsertSpaces)
{
// Normalize to spaces because the rest of the formatting pipeline operates based on the assumption.
offset *= (int)context.Options.TabSize;
}
return(offset);
}
private void InsertExteriorTrivia(ITextView view, ITextBuffer subjectBuffer, DocumentOptionSet options, TextLine currentLine, TextLine previousLine)
{
var insertionText = CreateInsertionTextFromPreviousLine(previousLine, options);
var firstNonWhitespaceOffset = currentLine.GetFirstNonWhitespaceOffset();
var replaceSpan = firstNonWhitespaceOffset != null
? TextSpan.FromBounds(currentLine.Start, currentLine.Start + firstNonWhitespaceOffset.Value)
: currentLine.Span;
subjectBuffer.Replace(replaceSpan.ToSpan(), insertionText);
view.TryMoveCaretToAndEnsureVisible(subjectBuffer.CurrentSnapshot.GetPoint(replaceSpan.Start + insertionText.Length));
}