| public ScanUntilWithNesting ( StringBuilder buffer, char needle, bool requireFound = true ) : void | ||
| buffer | StringBuilder | |
| needle | char | |
| requireFound | bool | |
| return | void | |
// Basically, it's realy common for background-position to be something like "0px -20px", which shouldn't be interpretted as a math value
// so detect the case where two number with unit values are separated by whitespace and treat them as a compound value instead
// otherwise, fallback to normal parsing
internal static Value ParseBackgroundPositionValue(ParserStream stream)
{
var start = stream.Position;
var valueStr = new StringBuilder();
stream.ScanUntilWithNesting(valueStr, ';');
var value = valueStr.ToString();
var parts = value.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
var pos = Position.Create(start, stream.Position, Current.CurrentFilePath);
// something's up
if (parts.Length != 2)
{
return(MoreValueParser.Parse(value, pos));
}
var p1 = parts[0];
var p2 = parts[1];
var v1 = MoreValueParser.Parse(p1, pos);
var v2 = MoreValueParser.Parse(p2, pos);
if (v1 is NumberWithUnitValue && v2 is NumberWithUnitValue)
{
return(new CompoundValue(v1, v2));
}
return(MoreValueParser.Parse(value, pos));
}
internal static Import ParseImportDirective(ParserStream stream)
{
var start = stream.Position;
var buffer = new StringBuilder();
stream.ScanUntilWithNesting(buffer, ';');
var toParse = buffer.ToString().Trim();
Value val;
MediaQuery media;
string mediaStr;
if (Regex.IsMatch(toParse, @"url\s*?\(", RegexOptions.IgnoreCase))
{
var i = toParse.IndexOf(')');
if (i == -1)
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Expected ')'");;
throw new StoppedParsingException();
}
val = Value.Parse(toParse.Substring(0, i + 1), start, start + i + 1, Current.CurrentFilePath);
mediaStr = toParse.Substring(i + 1);
}
else
{
if (!(toParse.StartsWith("\"") || toParse.StartsWith("'")))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Expected quote");
throw new StoppedParsingException();
}
var i = toParse.LastIndexOf(toParse[0]);
if (i == -1)
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Expected '" + toParse[0] + "'");
throw new StoppedParsingException();
}
val = Value.Parse(toParse.Substring(0, i + 1), start, start + i + 1, Current.CurrentFilePath);
mediaStr = toParse.Substring(i + 1);
}
mediaStr = mediaStr.Trim();
if (mediaStr.Length > 0)
{
media = MediaQueryParser.Parse(mediaStr, Position.Create(start, stream.Position, Current.CurrentFilePath));
}
else
{
media = new MediaType(Media.all, Position.Create(start, stream.Position, Current.CurrentFilePath));
}
return(new Import(val, media, start, stream.Position, Current.CurrentFilePath));
}
internal static Value ParseMoreValue(ParserStream stream)
{
var start = stream.Position;
var valueStr = new StringBuilder();
stream.ScanUntilWithNesting(valueStr, ';');
var value = valueStr.ToString();
return(Value.Parse(value, start, stream.Position, Current.CurrentFilePath));
}
internal static GroupedValue ParseGroup(ParserStream stream, IPosition forPosition)
{
var toParse = new StringBuilder();
stream.Advance(); // skip (
stream.ScanUntilWithNesting(toParse, ')');
var group = toParse.ToString().Trim();
var ret = Parse(group, forPosition);
return(new GroupedValue(ret));
}
internal static Value ParseFontLikeValue(ParserStream stream)
{
var start = stream.Position;
var valueStr = new StringBuilder();
stream.ScanUntilWithNesting(valueStr, ';');
var value = valueStr.ToString();
// The shorthand isn't in use, so we can handle this
if (value.IndexOf('/') == -1)
{
return(MoreValueParser.Parse(value, Position.Create(start, stream.Position, Current.CurrentFilePath)));
}
return(new StringValue(value));
}
internal static MoreVariable ParseMoreVariable(string name, ParserStream stream, int start)
{
name = name.Trim();
var valueStart = stream.Position;
var valueStr = new StringBuilder();
stream.ScanUntilWithNesting(valueStr, ';');
var value = Value.Parse(valueStr.ToString().Trim(), valueStart, stream.Position, Current.CurrentFilePath, allowSelectorIncludes: true);
if (name.ToLower().In(ReservedWords))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "'" + name + "' cannot be a variable name.");
}
return(new MoreVariable(name, value, start, stream.Position, Current.CurrentFilePath));
}
public static Value Parse(string value, IPosition forPosition, bool allowSelectorIncludes = false)
{
var ret = new List<Value>();
using (var stream = new ParserStream(new StringReader(value)))
{
while (stream.HasMore())
{
var buffer = new StringBuilder();
stream.ScanUntilWithNesting(buffer, ',', requireFound: false);
using (var subStream = new ParserStream(new StringReader(buffer.ToString())))
{
ret.Add(ParseImpl(subStream, forPosition, allowSelectorIncludes));
}
}
}
if (ret.Count == 1) return ret[0];
return new CommaDelimittedValue(ret);
}
public static Value Parse(string value, IPosition forPosition, bool allowSelectorIncludes = false)
{
var ret = new List <Value>();
using (var stream = new ParserStream(new StringReader(value)))
{
while (stream.HasMore())
{
var buffer = new StringBuilder();
stream.ScanUntilWithNesting(buffer, ',', requireFound: false);
using (var subStream = new ParserStream(new StringReader(buffer.ToString())))
{
ret.Add(ParseImpl(subStream, forPosition, allowSelectorIncludes));
}
}
}
if (ret.Count == 1)
{
return(ret[0]);
}
return(new CommaDelimittedValue(ret));
}
internal static Property ParseMixinOrVariableRule(ParserStream stream)
{
var start = stream.Position;
var name = new StringBuilder();
stream.Advance(); // Skip @
bool trimmingWhiteSpace = false;
while (stream.HasMore() && !stream.Peek().In('(', '='))
{
// Check for nested media block syntax
if (name.ToString().Equals("media", StringComparison.InvariantCultureIgnoreCase))
{
return ParseInnerMediaDirective(stream);
}
var c = stream.Read();
if (char.IsWhiteSpace(c))
{
trimmingWhiteSpace = true;
continue;
}
if (trimmingWhiteSpace || (!char.IsLetterOrDigit(c) && !c.In('-', '_')))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Unexpected character '" + c + "'");
throw new StoppedParsingException();
}
name.Append(c);
}
if (!stream.Peek().In('(', '='))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Expected '(' or '='");
throw new StoppedParsingException();
}
if (stream.Peek() == '=')
{
stream.Advance();
var localValue = ParseMoreValue(stream);
var varName = name.ToString().Trim();
if (varName.ToLower().In(ReservedWords))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "'" + varName + "' cannot be a variable name.");
}
return new VariableProperty(varName, localValue, start, stream.Position, Current.CurrentFilePath);
}
stream.Advance();
var startParams = stream.Position;
var paramStart = stream.Position;
var @params = new StringBuilder();
stream.ScanUntilWithNesting(@params, ')');
var paramStop = stream.Position;
var options = new StringBuilder();
var optionsStart = stream.Position;
stream.ScanUntil(options, ';');
var nameStr = name.ToString().Trim();
var paramsStr = @params.ToString().Trim();
var optionsStr = options.ToString().Trim();
var optional = optionsStr.Contains('?');
var overrides = optionsStr.Contains('!');
var unexpected = optionsStr.Where(c => !char.IsWhiteSpace(c) && c != '?' && c != '!');
if (unexpected.Count() != 0)
{
if (unexpected.Count() == 0)
{
Current.RecordError(ErrorType.Parser, Position.Create(start, optionsStart + options.Length, Current.CurrentFilePath), "Unexpected character '" + unexpected.ElementAt(0) + "'");
}
else
{
Current.RecordError(
ErrorType.Parser,
Position.Create(
start,
optionsStart + options.Length,
Current.CurrentFilePath
),
"Unexpected characters "+
string.Join(", ", unexpected.Select(c => "'"+c+"'"))
);
}
throw new StoppedParsingException();
}
if (name.Length == 0)
{
if (optional)
{
Current.RecordWarning(ErrorType.Parser, Position.Create(start, optionsStart + options.Length, Current.CurrentFilePath), "Include directives are always optional, no trailing '?' is needed.");
}
return new IncludeSelectorProperty(Selector.Parse(paramsStr, paramStart, paramStop, Current.CurrentFilePath), overrides, start, stream.Position, Current.CurrentFilePath);
}
if (name.ToString().Trim().Equals("reset", StringComparison.InvariantCultureIgnoreCase))
{
if (paramsStr.Trim().Length != 0)
{
return new ResetProperty(Selector.Parse(paramsStr, paramStart, paramStop, Current.CurrentFilePath), start, stream.Position, Current.CurrentFilePath);
}
return new ResetSelfProperty(InvalidSelector.Singleton, start, stream.Position, Current.CurrentFilePath);
}
return new MixinApplicationProperty(nameStr, ParseApplicationParameters(paramsStr, startParams), optional: optional, overrides: overrides, start: start, stop: stream.Position, filePath: Current.CurrentFilePath);
}
internal static Property ParseMixinOrVariableRule(ParserStream stream)
{
var start = stream.Position;
var name = new StringBuilder();
stream.Advance(); // Skip @
bool trimmingWhiteSpace = false;
while (stream.HasMore() && !stream.Peek().In('(', '='))
{
// Check for nested media block syntax
if (name.ToString().Equals("media", StringComparison.InvariantCultureIgnoreCase))
{
return(ParseInnerMediaDirective(stream));
}
var c = stream.Read();
if (char.IsWhiteSpace(c))
{
trimmingWhiteSpace = true;
continue;
}
if (trimmingWhiteSpace || (!char.IsLetterOrDigit(c) && !c.In('-', '_')))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Unexpected character '" + c + "'");
throw new StoppedParsingException();
}
name.Append(c);
}
if (!stream.Peek().In('(', '='))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Expected '(' or '='");
throw new StoppedParsingException();
}
if (stream.Peek() == '=')
{
stream.Advance();
var localValue = ParseMoreValue(stream);
var varName = name.ToString().Trim();
if (varName.ToLower().In(ReservedWords))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "'" + varName + "' cannot be a variable name.");
}
return(new VariableProperty(varName, localValue, start, stream.Position, Current.CurrentFilePath));
}
stream.Advance();
var startParams = stream.Position;
var paramStart = stream.Position;
var @params = new StringBuilder();
stream.ScanUntilWithNesting(@params, ')');
var paramStop = stream.Position;
var options = new StringBuilder();
var optionsStart = stream.Position;
stream.ScanUntil(options, ';');
var nameStr = name.ToString().Trim();
var paramsStr = @params.ToString().Trim();
var optionsStr = options.ToString().Trim();
var optional = optionsStr.Contains('?');
var overrides = optionsStr.Contains('!');
var unexpected = optionsStr.Where(c => !char.IsWhiteSpace(c) && c != '?' && c != '!');
if (unexpected.Count() != 0)
{
if (unexpected.Count() == 0)
{
Current.RecordError(ErrorType.Parser, Position.Create(start, optionsStart + options.Length, Current.CurrentFilePath), "Unexpected character '" + unexpected.ElementAt(0) + "'");
}
else
{
Current.RecordError(
ErrorType.Parser,
Position.Create(
start,
optionsStart + options.Length,
Current.CurrentFilePath
),
"Unexpected characters " +
string.Join(", ", unexpected.Select(c => "'" + c + "'"))
);
}
throw new StoppedParsingException();
}
if (name.Length == 0)
{
if (optional)
{
Current.RecordWarning(ErrorType.Parser, Position.Create(start, optionsStart + options.Length, Current.CurrentFilePath), "Include directives are always optional, no trailing '?' is needed.");
}
return(new IncludeSelectorProperty(Selector.Parse(paramsStr, paramStart, paramStop, Current.CurrentFilePath), overrides, start, stream.Position, Current.CurrentFilePath));
}
if (name.ToString().Trim().Equals("reset", StringComparison.InvariantCultureIgnoreCase))
{
if (paramsStr.Trim().Length != 0)
{
return(new ResetProperty(Selector.Parse(paramsStr, paramStart, paramStop, Current.CurrentFilePath), start, stream.Position, Current.CurrentFilePath));
}
return(new ResetSelfProperty(InvalidSelector.Singleton, start, stream.Position, Current.CurrentFilePath));
}
return(new MixinApplicationProperty(nameStr, ParseApplicationParameters(paramsStr, startParams), optional: optional, overrides: overrides, start: start, stop: stream.Position, filePath: Current.CurrentFilePath));
}
internal static Value ParseFuncValue(ParserStream stream, IPosition forPosition, bool allowSelectorIncludes)
{
stream.Advance(); // skip @
var buffer = new StringBuilder();
var c = stream.Peek();
while (char.IsWhiteSpace(c))
{
stream.Advance();
c = stream.Peek();
}
if (!char.IsLetter(c) && c != '(')
{
Current.RecordError(ErrorType.Parser, forPosition, "Expected letter or '(', found '" + c + "'");
throw new StoppedParsingException();
}
if (c != '(')
{
buffer.Append(stream.Read());
while (stream.HasMore() && char.IsLetterOrDigit(stream.Peek()))
{
buffer.Append(stream.Read());
}
}
var funcName = buffer.ToString();
buffer.Clear();
while (stream.HasMore() && char.IsWhiteSpace(stream.Peek()))
{
buffer.Append(stream.Read());
}
if (stream.HasMore() && stream.Peek() == '(')
{
stream.Read(); // Skip (
buffer.Clear();
stream.ScanUntilWithNesting(buffer, ')');
if (funcName.Length == 0)
{
if (allowSelectorIncludes)
{
var sel = Selector.Parse(buffer.ToString(), forPosition.Start, forPosition.Stop, forPosition.FilePath);
return(new IncludeSelectorValue(sel));
}
return(new StringValue("@(" + buffer + ")"));
}
var value = MoreValueParser.Parse(buffer.ToString().Trim(), forPosition, allowSelectorIncludes: true);
if (value is NotFoundValue)
{
throw new StoppedParsingException();
}
var @params = new List <Value>();
if (value is CommaDelimittedValue)
{
@params.AddRange(((CommaDelimittedValue)value).Values);
}
else
{
@params.Add(value);
}
return(new FuncAppliationValue(funcName, @params));
}
return(new FuncValue(funcName));
}
internal static Value ParseFuncValue(ParserStream stream, IPosition forPosition, bool allowSelectorIncludes)
{
stream.Advance(); // skip @
var buffer = new StringBuilder();
var c = stream.Peek();
while (char.IsWhiteSpace(c))
{
stream.Advance();
c = stream.Peek();
}
if (!char.IsLetter(c) && c != '(')
{
Current.RecordError(ErrorType.Parser, forPosition, "Expected letter or '(', found '" + c + "'");
throw new StoppedParsingException();
}
if (c != '(')
{
buffer.Append(stream.Read());
while (stream.HasMore() && char.IsLetterOrDigit(stream.Peek()))
{
buffer.Append(stream.Read());
}
}
var funcName = buffer.ToString();
buffer.Clear();
while (stream.HasMore() && char.IsWhiteSpace(stream.Peek()))
{
buffer.Append(stream.Read());
}
if (stream.HasMore() && stream.Peek() == '(')
{
stream.Read(); // Skip (
buffer.Clear();
stream.ScanUntilWithNesting(buffer, ')');
if (funcName.Length == 0)
{
if (allowSelectorIncludes)
{
var sel = Selector.Parse(buffer.ToString(), forPosition.Start, forPosition.Stop, forPosition.FilePath);
return new IncludeSelectorValue(sel);
}
return new StringValue("@(" + buffer + ")");
}
var value = MoreValueParser.Parse(buffer.ToString().Trim(), forPosition, allowSelectorIncludes: true);
if (value is NotFoundValue) throw new StoppedParsingException();
var @params = new List<Value>();
if (value is CommaDelimittedValue)
{
@params.AddRange(((CommaDelimittedValue)value).Values);
}
else
{
@params.Add(value);
}
return new FuncAppliationValue(funcName, @params);
}
return new FuncValue(funcName);
}
internal static GroupedValue ParseGroup(ParserStream stream, IPosition forPosition)
{
var toParse = new StringBuilder();
stream.Advance(); // skip (
stream.ScanUntilWithNesting(toParse, ')');
var group = toParse.ToString().Trim();
var ret = Parse(group, forPosition);
return new GroupedValue(ret);
}
// Basically, it's realy common for background-position to be something like "0px -20px", which shouldn't be interpretted as a math value
// so detect the case where two number with unit values are separated by whitespace and treat them as a compound value instead
// otherwise, fallback to normal parsing
internal static Value ParseBackgroundPositionValue(ParserStream stream)
{
var start = stream.Position;
var valueStr = new StringBuilder();
stream.ScanUntilWithNesting(valueStr, ';');
var value = valueStr.ToString();
var parts = value.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
var pos = Position.Create(start, stream.Position, Current.CurrentFilePath);
// something's up
if (parts.Length != 2)
{
return MoreValueParser.Parse(value, pos);
}
var p1 = parts[0];
var p2 = parts[1];
var v1 = MoreValueParser.Parse(p1, pos);
var v2 = MoreValueParser.Parse(p2, pos);
if (v1 is NumberWithUnitValue && v2 is NumberWithUnitValue)
{
return new CompoundValue(v1, v2);
}
return MoreValueParser.Parse(value, pos);
}
internal static MoreVariable ParseMoreVariable(string name, ParserStream stream, int start)
{
name = name.Trim();
var valueStart = stream.Position;
var valueStr = new StringBuilder();
stream.ScanUntilWithNesting(valueStr, ';');
var value = Value.Parse(valueStr.ToString().Trim(), valueStart, stream.Position, Current.CurrentFilePath, allowSelectorIncludes: true);
if (name.ToLower().In(ReservedWords))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "'" + name + "' cannot be a variable name.");
}
return new MoreVariable(name, value, start, stream.Position, Current.CurrentFilePath);
}
internal static Value ParseMoreValue(ParserStream stream)
{
var start = stream.Position;
var valueStr = new StringBuilder();
stream.ScanUntilWithNesting(valueStr, ';');
var value = valueStr.ToString();
return Value.Parse(value, start, stream.Position, Current.CurrentFilePath);
}
internal static Value ParseFontLikeValue(ParserStream stream)
{
var start = stream.Position;
var valueStr = new StringBuilder();
stream.ScanUntilWithNesting(valueStr, ';');
var value = valueStr.ToString();
// The shorthand isn't in use, so we can handle this
if(value.IndexOf('/') == -1)
{
return MoreValueParser.Parse(value, Position.Create(start, stream.Position, Current.CurrentFilePath));
}
return new StringValue(value);
}
internal static Import ParseImportDirective(ParserStream stream)
{
var start = stream.Position;
var buffer = new StringBuilder();
stream.ScanUntilWithNesting(buffer, ';');
var toParse = buffer.ToString().Trim();
Value val;
MediaQuery media;
string mediaStr;
if (Regex.IsMatch(toParse, @"url\s*?\(", RegexOptions.IgnoreCase))
{
var i = toParse.IndexOf(')');
if (i == -1)
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Expected ')'"); ;
throw new StoppedParsingException();
}
val = Value.Parse(toParse.Substring(0, i + 1), start, start + i + 1, Current.CurrentFilePath);
mediaStr = toParse.Substring(i + 1);
}
else
{
if (!(toParse.StartsWith("\"") || toParse.StartsWith("'")))
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Expected quote");
throw new StoppedParsingException();
}
var i = toParse.LastIndexOf(toParse[0]);
if (i == -1)
{
Current.RecordError(ErrorType.Parser, Position.Create(start, stream.Position, Current.CurrentFilePath), "Expected '" + toParse[0] + "'");
throw new StoppedParsingException();
}
val = Value.Parse(toParse.Substring(0, i + 1), start, start + i + 1, Current.CurrentFilePath);
mediaStr = toParse.Substring(i + 1);
}
mediaStr = mediaStr.Trim();
if (mediaStr.Length > 0)
{
media = MediaQueryParser.Parse(mediaStr, Position.Create(start, stream.Position, Current.CurrentFilePath));
}
else
{
media = new MediaType(Media.all, Position.Create(start, stream.Position, Current.CurrentFilePath));
}
return new Import(val, media, start, stream.Position, Current.CurrentFilePath);
}