internal IInteractiveWindowCommand TryParseCommand(SnapshotSpan span, out SnapshotSpan prefixSpan, out SnapshotSpan commandSpan, out SnapshotSpan argumentsSpan)
{
string prefix = CommandPrefix;
SnapshotSpan trimmed = span.TrimStart();
if (!trimmed.StartsWith(prefix))
{
prefixSpan = commandSpan = argumentsSpan = default(SnapshotSpan);
return(null);
}
prefixSpan = trimmed.SubSpan(0, prefix.Length);
var nameAndArgs = trimmed.SubSpan(prefix.Length).TrimStart();
SnapshotPoint nameEnd = nameAndArgs.IndexOfAnyWhiteSpace() ?? span.End;
commandSpan = new SnapshotSpan(span.Snapshot, Span.FromBounds(nameAndArgs.Start.Position, nameEnd.Position));
argumentsSpan = new SnapshotSpan(span.Snapshot, Span.FromBounds(nameEnd.Position, span.End.Position)).Trim();
return(this[commandSpan.GetText()]);
}
