/// <summary>
/// Implementation of default indentation.
/// </summary>
/// <param name="line">The current line after Enter.</param>
/// <param name="tabSize">The TAB size.</param>
/// <returns>Desired indentation size.</returns>
private int?GetDefaultIndentationImp(ITextSnapshotLine line, int tabSize)
{
int lineNumber = line.LineNumber;
if (lineNumber < 1)
{
return(0);
}
string baselineText = null;
ITextSnapshotLine baseline = null;
IndentUtilities.SkipPrecedingBlankLines(line, out baselineText, out baseline);
return(IndentUtilities.GetCurrentLineIndentation(baselineText, tabSize));
}
/// <summary>
/// Implementation of smart indentation.
/// </summary>
/// <param name="line">The current line after Enter.</param>
/// <param name="tabSize">The TAB size.</param>
/// <returns>Desired indentation size.</returns>
private int?GetSmartIndentationImp(ITextSnapshotLine line, int tabSize)
{
int lineNumber = line.LineNumber;
if (lineNumber < 0)
{
return(null);
}
string baselineText;
ITextSnapshotLine baseline;
char groupStartChar;
string groupStartLineText;
IndentUtilities.SkipPrecedingBlankLines(line, out baselineText, out baseline);
int indentation = IndentUtilities.GetCurrentLineIndentation(baselineText, tabSize);
// If no group start can be found, follow the default indentation
if (!FindFirstGroupStart(baseline, out groupStartChar, out groupStartLineText))
{
return(indentation);
}
indentation = IndentUtilities.GetCurrentLineIndentation(groupStartLineText, tabSize);
// If there is no group end in the current line, or there is one but there are other non-whitespace chars preceding it
// then add a TAB compared with the indentation of the line of group start.
SnapshotPoint lastGroupEnd;
if (!FindFirstGroupEnd(line, groupStartChar, out lastGroupEnd))
{
return(indentation += tabSize);
}
// Approach here as the group end was found and there are only white spaces between line start and the group end.
// We need to delete all the white spaces and then indent it the size as same as group start line.
var textBuffer = line.Snapshot.TextBuffer;
int precedingWhiteSpaces = lastGroupEnd - line.Start;
if (precedingWhiteSpaces > 0 &&
!textBuffer.EditInProgress &&
textBuffer.CurrentSnapshot.Length >= precedingWhiteSpaces)
{
textBuffer.Delete(new Span(line.Start, precedingWhiteSpaces));
}
return(indentation);
}