private IPropertyExpression AttachedDependencyProperty(Lexemes <ˍ> lexemes)
{
if (lexemes.AcceptToken("("))
{
var xamlType = this.XamlType(lexemes);
lexemes.AcceptToken(".");
lexemes.AcceptTokenType(ˍ._, out var propertyName);
if (lexemes.AcceptToken(")"))
{
return(new AttachedDependencyProperty(xamlType, propertyName));
}
}
return(null);
}
private Expression MagnitudeExpression(Lexemes lexemes, Expression lhs, ParseSettings parseSettings)
{
if (lexemes.AcceptToken(Constants.Power))
{
var constantExpression = this.ConstantExpression(lexemes, parseSettings);
return(this.MagnitudeExpression(
lexemes,
new MagnitudeExpression(lhs, constantExpression),
parseSettings));
}
string exponent;
if (lexemes.AcceptTokenType(TokenType.Exponent, out exponent))
{
var constantExpression =
new ConstantExpression(
double.Parse(CharacterConverter.FromExponentNotation(exponent), parseSettings.CultureInfo));
return(this.MagnitudeExpression(
lexemes,
new MagnitudeExpression(lhs, constantExpression),
parseSettings));
}
return(lhs);
}
private Expression MultiplicativeExpression(Lexemes lexemes, Expression lhs, ParseSettings parseSettings)
{
if (lexemes.AcceptToken(Constants.Multiply) || lexemes.AcceptToken(Constants.MultiplyDot) ||
lexemes.AcceptToken(Constants.MultiplyCross))
{
var rhs = this.TryMagnitudeExpression(lexemes, parseSettings);
return(this.MultiplicativeExpression(lexemes, new MultiplicationExpression(lhs, rhs), parseSettings));
}
if (lexemes.AcceptToken(Constants.Divide))
{
var rhs = this.TryMagnitudeExpression(lexemes, parseSettings);
return(this.MultiplicativeExpression(lexemes, new DivisionExpression(lhs, rhs), parseSettings));
}
return(lhs);
}
private IIndexerExpression Indexer(Lexemes <ˍ> lexemes)
{
if (lexemes.AcceptToken("["))
{
var literalList = new List <Literal>();
this.LiteralList(lexemes, literalList);
if (lexemes.AcceptToken("]"))
{
if (lexemes.AcceptTokenType(TokenInfo.End))
{
lexemes.MoveToPrevious();
return(new Indexer(literalList));
}
return(new IndexerPart(literalList));
}
throw CreateParseException(BindingPathError.RightAngleBracketMissing, lexemes.Current);
}
return(null);
}
private XamlType XamlType(Lexemes <ˍ> lexemes)
{
var namespacePrefix = string.Empty;
lexemes.AcceptTokenType(ˍ._, out var identifier);
if (lexemes.AcceptToken(":"))
{
namespacePrefix = identifier;
lexemes.AcceptTokenType(ˍ._, out identifier);
}
return(new XamlType(namespacePrefix, identifier));
}
private Expression PrimaryExpression(Lexemes lexemes, ParseSettings parseSettings)
{
if (lexemes.AcceptToken(Constants.LeftParenthesis))
{
var expression = this.Expression(lexemes, parseSettings);
if (lexemes.AcceptToken(Constants.RightParenthesis))
{
return(new ParenthesisExpression(expression));
}
throw CreateParseException(ExpressionError.RightParenthesisNotFound, lexemes.Current);
}
if (lexemes.AcceptToken(Constants.LeftWeakParenthesis))
{
var expression = this.Expression(lexemes, parseSettings);
if (lexemes.AcceptToken(Constants.RightWeakParenthesis))
{
return(expression);
}
throw CreateParseException(ExpressionError.RightWeakParenthesisNotFound, lexemes.Current);
}
string identifier;
if (lexemes.AcceptTokenType(TokenType.Identifier, true, out identifier))
{
var result = this.unitExpressionParser.Parse(identifier, false);
if (result)
{
return(result.Value);
}
throw CreateParseException(ExpressionError.IdentifierNotFound, lexemes.MoveToPrevious(), result.Error);
}
return(this.ConstantExpression(lexemes, parseSettings));
}
private IBindingPathExpression PropertyAccessor(Lexemes <ˍ> lexemes, IBindingPathExpression lhs)
{
if (lexemes.AcceptToken("."))
{
var result = this.AttachedDependencyProperty(lexemes);
if (result == null)
{
result = this.Property(lexemes, true);
}
return(this.BindingPath(lexemes, new PropertyAccessor(lhs, result)));
}
return(lhs);
}
private void LiteralList(Lexemes <ˍ> lexemes, List <Literal> literalList)
{
XamlType castXamlType = default;
if (lexemes.AcceptToken("("))
{
castXamlType = this.XamlType(lexemes);
if (!lexemes.AcceptToken(")"))
{
throw CreateParseException(BindingPathError.RightParenthesisMissing, lexemes.Current);
}
}
if (!lexemes.AcceptTokenType(ˍ._, true, out var value))
{
throw CreateParseException(BindingPathError.ValueMissing, lexemes.Current);
}
literalList.Add(new Literal(castXamlType, value.Trim()));
if (lexemes.AcceptToken(","))
{
this.LiteralList(lexemes, literalList);
}
}
private IBindingPathExpression PrimaryExpression(Lexemes <ˍ> lexemes)
{
if (lexemes.AcceptToken("."))
{
return(new DataContextSource());
}
var indexerResult = this.Indexer(lexemes);
if (indexerResult != null)
{
return(indexerResult);
}
var dependencyPropertyResult = this.AttachedDependencyProperty(lexemes);
if (dependencyPropertyResult != null)
{
return(dependencyPropertyResult);
}
return(this.Property(lexemes, false));
}
private Expression MultiplicativeExpression(Lexemes lexemes, Expression lhs, ParseSettings parseSettings)
{
if (lexemes.AcceptToken(Constants.Multiply) || lexemes.AcceptToken(Constants.MultiplyDot)
|| lexemes.AcceptToken(Constants.MultiplyCross))
{
var rhs = this.TryMagnitudeExpression(lexemes, parseSettings);
return this.MultiplicativeExpression(lexemes, new MultiplicationExpression(lhs, rhs), parseSettings);
}
if (lexemes.AcceptToken(Constants.Divide))
{
var rhs = this.TryMagnitudeExpression(lexemes, parseSettings);
return this.MultiplicativeExpression(lexemes, new DivisionExpression(lhs, rhs), parseSettings);
}
return lhs;
}
private Expression PrimaryExpression(Lexemes lexemes, ParseSettings parseSettings)
{
if (lexemes.AcceptToken(Constants.LeftParenthesis))
{
var expression = this.Expression(lexemes, parseSettings);
if (lexemes.AcceptToken(Constants.RightParenthesis))
{
return new ParenthesisExpression(expression);
}
throw CreateParseException(ExpressionError.RightParenthesisNotFound, lexemes.Current);
}
if (lexemes.AcceptToken(Constants.LeftWeakParenthesis))
{
var expression = this.Expression(lexemes, parseSettings);
if (lexemes.AcceptToken(Constants.RightWeakParenthesis))
{
return expression;
}
throw CreateParseException(ExpressionError.RightWeakParenthesisNotFound, lexemes.Current);
}
string identifier;
if (lexemes.AcceptTokenType(TokenType.Identifier, true, out identifier))
{
var result = this.unitExpressionParser.Parse(identifier, false);
if (result)
{
return result.Value;
}
throw CreateParseException(ExpressionError.IdentifierNotFound, lexemes.MoveToPrevious(), result.Error);
}
return this.ConstantExpression(lexemes, parseSettings);
}
private Expression MagnitudeExpression(Lexemes lexemes, Expression lhs, ParseSettings parseSettings)
{
if (lexemes.AcceptToken(Constants.Power))
{
var constantExpression = this.ConstantExpression(lexemes, parseSettings);
return this.MagnitudeExpression(
lexemes,
new MagnitudeExpression(lhs, constantExpression),
parseSettings);
}
string exponent;
if (lexemes.AcceptTokenType(TokenType.Exponent, out exponent))
{
var constantExpression =
new ConstantExpression(
double.Parse(CharacterConverter.FromExponentNotation(exponent), parseSettings.CultureInfo));
return this.MagnitudeExpression(
lexemes,
new MagnitudeExpression(lhs, constantExpression),
parseSettings);
}
return lhs;
}
