public static bool CommentOrUncommentBlock(ITextView view, bool comment)
{
SnapshotPoint start, end;
SnapshotPoint?mappedStart, mappedEnd;
if (view.Selection.IsActive && !view.Selection.IsEmpty)
{
// comment every line in the selection
start = view.Selection.Start.Position;
end = view.Selection.End.Position;
mappedStart = MapPoint(view, start);
var endLine = end.GetContainingLine();
if (endLine.Start == end)
{
// http://pytools.codeplex.com/workitem/814
// User selected one extra line, but no text on that line. So let's
// back it up to the previous line. It's impossible that we're on the
// 1st line here because we have a selection, and we end at the start of
// a line. In normal selection this is only possible if we wrapped onto the
// 2nd line, and it's impossible to have a box selection with a single line.
end = end.Snapshot.GetLineFromLineNumber(endLine.LineNumber - 1).End;
}
mappedEnd = MapPoint(view, end);
}
else
{
// comment the current line
start = end = view.Caret.Position.BufferPosition;
mappedStart = mappedEnd = MapPoint(view, start);
}
if (mappedStart != null && mappedEnd != null &&
mappedStart.Value <= mappedEnd.Value)
{
if (comment)
{
CommentRegion(view, mappedStart.Value, mappedEnd.Value);
}
else
{
UncommentRegion(view, mappedStart.Value, mappedEnd.Value);
}
// TODO: select multiple spans?
// Select the full region we just commented, do not select if in projection buffer
// (the selection might span non-language buffer regions)
if (VSGeneroConstants.IsGenero4GLContent(view.TextBuffer))
{
UpdateSelection(view, start, end);
}
return(true);
}
return(false);
}
internal static SnapshotPoint?GetCaretPosition(this ITextView view)
{
return(view.BufferGraph.MapDownToFirstMatch(
new SnapshotPoint(view.TextBuffer.CurrentSnapshot, view.Caret.Position.BufferPosition),
PointTrackingMode.Positive,
(x) => VSGeneroConstants.IsGenero4GLContent(x) || VSGeneroConstants.IsGeneroPERContent(x),
PositionAffinity.Successor
));
}
