private static List <TokenNode> GenerateTokens(IEnumerable <LineMeta> lines)
{
var capturedTokens = new Stack <TokenNode>();
foreach (LineMeta meta in lines)
{
string line = meta.Line;
// ZLog.Info($"[PASS 1] {line}, tokens: {capturedTokens.Count}");
if (!line.StartsWith(ParseTokens.CUE_CHAR, out string cueLine))
{
TokenNode node;
if (line == "")
{
node = new TokenNode
{
Type = TokenType.BREAK,
LineNumber = meta.LineNumber,
};
}
else
{
node = new TokenNode
{
Type = TokenType.MISC,
LineNumber = meta.LineNumber,
Content = line
};
}
capturedTokens.Push(node);
// TokenNode previousNode = capturedTokens.Peek();
//
// if (previousNode.Content == null)
// {
// previousNode.Content = line;
// }
// else
// {
// previousNode.Content += $"{Environment.NewLine}{line}";
// }
}
else
{
string cueToken = ScriptConstants.ParseCueToken(cueLine, out string cueData);
// ZLog.Info($"[TOKEN] {cueToken}");
if (cueToken.StartsWith(ParseTokens.CUE_END_TOKEN, out string endCueToken))
{
// ZLog.Info($"Found end token: {cueToken}");
if (capturedTokens.Count == 0)
{
throw new InvalidOperationException($"No captured items for token group: {endCueToken}, line: {meta.LineNumber}");
}
List <TokenNode> nodes = new List <TokenNode>();
TokenNode captureGroup;
while ((captureGroup = capturedTokens.Pop()) != null)
{
if (captureGroup.Keyword == endCueToken)
{
if (captureGroup.Children == null)
{
// found matching start token, has empty children
break;
}
}
// ZLog.Info($"{captureGroup.Keyword} part of capture group, remaining: {capturedTokens.Count}");
nodes.Add(captureGroup);
if (capturedTokens.Count == 0)
{
throw new InvalidOperationException(
$"No start token to capture group found: {endCueToken}, line: {meta.LineNumber}");
}
}
nodes.Reverse();
captureGroup.Children = nodes;
capturedTokens.Push(captureGroup);
continue;
}
TokenNode node = new TokenNode
{
Type = TokenType.KEYWORD,
LineNumber = meta.LineNumber,
Keyword = cueToken,
Data = cueData
};
capturedTokens.Push(node);
//
// ZLog.Info($"[NODE] {node}");
}
}
// since this is built up in reverse, we have to reverse it again to negate the effect
var result = capturedTokens.ToList();
result.Reverse();
return(result);
}
private void ParseNode(IDefParser parentParser, IDefParser defParser, TokenNode rootToken, List <ParsingError> errors)
{
if (rootToken.Data != null)
{
try
{
defParser.ParseOptions(rootToken.Options);
}
catch (Exception e)
{
errors.Add(new ParsingError
{
Node = rootToken,
Exception = e,
});
}
}
if (rootToken.Children == null)
{
throw new InvalidOperationException($"Expected keyword token to contain children: {rootToken}, parentParser: {parentParser}");
}
foreach (TokenNode childToken in rootToken.Children)
{
try
{
switch (childToken.Type)
{
case TokenType.KEYWORD:
if (childToken.IsLeaf)
{
try
{
defParser.ParseCue(childToken.Keyword, childToken.Data);
}
catch (Exception e)
{
errors.Add(new ParsingError
{
Node = childToken,
Exception = e,
});
}
}
else
{
if (!GetParser(childToken.Keyword, out IDefParser subParser))
{
throw new InvalidOperationException($"Unknown top-level token keyword: {childToken.Keyword}");
}
Type subtype = subParser.DefType;
object subdata = Activator.CreateInstance(subtype);
subParser.Def = subdata;
ParseNode(defParser, subParser, childToken, errors);
subParser.Def = null;
// object data = //n
// childToken.Keyword
try
{
defParser.ParseChildToken(subdata);
}
catch (Exception e)
{
errors.Add(new ParsingError
{
Node = childToken,
Exception = e,
});
}
}
break;
case TokenType.MISC:
if (childToken.Content != null)
{
defParser.ParseMisc(childToken.Content);
}
break;
case TokenType.BREAK:
defParser.ParseBreak();
break;
default:
ZLog.Warn($"Unhandled token type: {childToken.Type}");
break;
}
}
catch (Exception e)
{
errors.Add(new ParsingError
{
Node = childToken,
Exception = e,
});
}
}
}
