public override bool InsertNewLine()
{
string lineBreak = null;
if (_editorOptions.GetReplicateNewLineCharacter())
{
ITextSnapshot snapshot = _textBuffer.AdvancedTextBuffer.CurrentSnapshot;
int position = _trackingPoint.GetPosition(snapshot);
ITextSnapshotLine currentSnapshotLine = snapshot.GetLineFromPosition(position);
if (currentSnapshotLine.LineBreakLength > 0)
{
// use the same line ending as the current line
lineBreak = currentSnapshotLine.GetLineBreakText();
}
else
{
// we are on the last line of the buffer
if (snapshot.LineCount > 1)
{
// use the same line ending as the penultimate line in the buffer
lineBreak = snapshot.GetLineFromLineNumber(snapshot.LineCount - 2).GetLineBreakText();
}
}
}
return(InsertText(lineBreak ?? _editorOptions.GetNewLineCharacter()));
}
/// <summary>
/// For a given <see cref="ITextSnapshotLine"/> gets the new line character to be inserted to the line based on
/// either the given line, or the second last line or the default new line charcter provided by <see cref="IEditorOptions"/>
/// </summary>
/// <param name="line">The <see cref="ITextSnapshotLine"/> for whcih the new line character is to be decied for</param>
/// <param name="editorOptions">The current set of <see cref="IEditorOptions"/> applicable for the given <see cref="ITextSnapshotLine"/></param>
/// <returns>The new line character to be inserted</returns>
public static string GetNewLineCharacterToInsert(ITextSnapshotLine line, IEditorOptions editorOptions)
{
string lineBreak = null;
var snapshot = line.Snapshot;
if (editorOptions.GetReplicateNewLineCharacter())
{
if (line.LineBreakLength > 0)
{
// use the same line ending as the current line
lineBreak = line.GetLineBreakText();
}
else
{
if (snapshot.LineCount > 1)
{
// use the same line ending as the penultimate line in the buffer
lineBreak = snapshot.GetLineFromLineNumber(snapshot.LineCount - 2).GetLineBreakText();
}
}
}
string textToInsert = lineBreak ?? editorOptions.GetNewLineCharacter();
return(textToInsert);
}
public static string GetLineBreak(this IEditorOptions editorOptions, SnapshotPoint pos)
{
if (editorOptions.GetReplicateNewLineCharacter())
{
var line = pos.GetContainingLine();
if (line.LineBreakLength != 0)
{
return(pos.Snapshot.GetText(line.Extent.End.Position, line.LineBreakLength));
}
if (line.LineNumber != 0)
{
line = pos.Snapshot.GetLineFromLineNumber(line.LineNumber - 1);
return(pos.Snapshot.GetText(line.Extent.End.Position, line.LineBreakLength));
}
}
var linebreak = editorOptions.GetNewLineCharacter();
return(linebreak.Length != 0 ? linebreak : Environment.NewLine);
}