public static ParserAction Parse(ExpressionWalker ew, string code, LineBuilder output)
{
// multiline:
// %foreach expr%
// code #1
// %
// singleline:
// %foreach expr
// code #1
ew.IsCurrentOrThrow(ExpressionToken.Foreach);
ew.NextOrThrow();
//parse the arguments for the foreach
var args = ArgumentsExpression.Parse(ew, token => token.Token == ExpressionToken.NewLine || token.Token == ExpressionToken.Mod, false, typeof(ForeachExpression));
//ew.Back(); //agrumentsExpression skips the closer token and we need it to identify if this is a singleline or multiline
if (output == null)
{
output = new LineBuilder(code);
}
string content;
var relatedLines = new List <Line>();
relatedLines.AddRange(output.GetLinesRelated(args.Matches()));
if (ew.PeakBack.Token == ExpressionToken.Mod)
{
//the content is % to % block
var leftBorder = ew.Current.Match;
var nextMod = ForeachExpression.FindCloser(leftBorder.Index, code);
//handle implicit end block (when % is not existing)
if (nextMod == -1)
{
nextMod = code.Length - 1;
}
ew.SkipForwardWhile(token => token.Match.Index < nextMod);
ew.Next(); //skip % itself
var l1 = output.GetLineAt(leftBorder.Index) ?? output.Lines.First();
relatedLines.AddRange(new Range(l1.LineNumber, output.GetLineAt(nextMod).LineNumber).EnumerateIndexes().Select(output.GetLineByLineNumber));
content = null;
}
else
{
//the content is only next line
var leftMod = ew.Current.Match;
var nextMod = code.IndexOf('\n', leftMod.Index);
relatedLines.Add(output.GetLineByLineNumber(relatedLines.Last().LineNumber + 1)); //next line.
content = code.Substring(leftMod.Index, nextMod == -1 ? (code.Length - leftMod.Index) : nextMod - leftMod.Index);
}
relatedLines = relatedLines.Distinct().OrderBy(l => l.StartIndex).ToList();
if (relatedLines.Count(l => l.Content.Contains("%foreach")) <= relatedLines.Count(l => l.CleanContent() == "%") && relatedLines.Last().CleanContent() == "%")
{
relatedLines[relatedLines.Count - 1].MarkedForDeletion = true;
relatedLines.RemoveAt(relatedLines.Count - 1);
}
//make sure to clean out % at the end
if (content == null)
{
content = relatedLines.Select(l => l.Content).StringJoin();
}
//all lines of the foreach are destined to deletion
foreach (var line in relatedLines)
{
line.MarkedForDeletion = true;
}
return(new ParserAction(ParserToken.ForeachLoop, relatedLines, new ForeachExpression()
{
Content = content, Arguments = args
}));
}