// private utils related to extracting file content
/// <summary>
/// Checks that the given range is a valid range in file, and returns the text in the given range in concatenated form
/// stripping (only) end of line comments (and not removing excess brackets).
/// Note: the End position of the given range is *not* part of the returned string.
/// </summary>
private static string GetCodeSnippet(this FileContentManager file, Range range)
{
if (!file.ContainsRange(range))
{
throw new ArgumentException($"cannot extract code snippet for the given range \n range: {range.DiagnosticString()}");
}
string CodeLine(CodeLine line) => line.WithoutEnding + line.LineEnding;
var start = range.Start.Line;
var count = range.End.Line - start + 1;
var firstLine = CodeLine(file.GetLine(start));
if (count == 1)
{
return(firstLine.Substring(range.Start.Column, range.End.Column - range.Start.Column));
}
var lastLine = CodeLine(file.GetLine(range.End.Line));
var prepend = firstLine.Substring(range.Start.Column);
var append = lastLine.Substring(0, range.End.Column);
var middle = file.GetLines(start + 1, count - 2).Select(CodeLine).ToArray();
if (middle.Length == 0)
{
return(Utils.JoinLines(new string[] { prepend, append }));
}
else
{
return(Utils.JoinLines(new string[] { prepend, Utils.JoinLines(middle), append })); // Note: use JoinLines here to get accurate position infos for errors
}
}
/// <summary>
/// Returns all code fragments in the specified file that overlap with the given range.
/// Returns an empty sequence if any of the given arguments is null.
/// </summary>
private static IEnumerable <CodeFragment> FragmentsOverlappingWithRange(this FileContentManager file, Range range)
{
if (file is null || range is null)
{
return(Enumerable.Empty <CodeFragment>());
}
var(start, end) = (range.Start.Line, range.End.Line);
var fragAtStart = file.TryGetFragmentAt(range.Start, out _, includeEnd: true);
var inRange = file.GetTokenizedLine(start).Select(t => t.WithLineNumOffset(start)).Where(ContextBuilder.TokensAfter(range.Start)); // does not include fragAtStart
inRange = start == end
? inRange.Where(ContextBuilder.TokensStartingBefore(range.End))
: inRange.Concat(file.GetTokenizedLines(start + 1, end - start - 1).SelectMany((x, i) => x.Select(t => t.WithLineNumOffset(start + 1 + i))))
.Concat(file.GetTokenizedLine(end).Select(t => t.WithLineNumOffset(end)).Where(ContextBuilder.TokensStartingBefore(range.End)));
var fragments = ImmutableArray.CreateBuilder <CodeFragment>();
if (fragAtStart != null)
{
fragments.Add(fragAtStart);
}
fragments.AddRange(inRange);
return(fragments.ToImmutableArray());
}
// utils for getting the necessary information for editor commands
internal static Location AsLocation(string source, Position offset, Range relRange) =>
