/// <summary>
/// Tries to parse a vector attribute on an XML node.
/// </summary>
/// <param name="lexer">The lexer.</param>
/// <param name="diagnostics">The diagnostics handler.</param>
/// <param name="result">The result.</param>
/// <returns>Returns <c>true</c> if the coordinate was parsed; otherwise, <c>false</c>.</returns>
public static bool TryParseVector(this SvgPathDataLexer lexer, IDiagnosticHandler diagnostics, Vector2 defaultValue, out Vector2 result)
{
bool success = true;
success &= TryParseCoordinate(lexer, diagnostics, defaultValue.X, out double x);
success &= TryParseCoordinate(lexer, diagnostics, defaultValue.Y, out double y);
result = new(x, y);
return(success);
}
/// <summary>
/// Tries to parse an optional coordinate.
/// </summary>
/// <param name="lexer">The lexer.</param>
/// <param name="diagnostics">The diagnostics.</param>
/// <param name="defaultValue">The default value.</param>
/// <param name="result">The result.</param>
/// <returns>Returns <c>true</c> if the coordinate was parsed; otherwise, <c>false</c>.</returns>
public static bool TryParseCoordinate(this SvgPathDataLexer lexer, IDiagnosticHandler diagnostics, double defaultValue, out double result)
{
if (lexer.Branch(TokenType.Number, out var value))
{
if (!double.TryParse(value.Content.ToString(), NumberStyles.Float, Culture, out result))
{
diagnostics?.Post(new DiagnosticMessage(SeverityLevel.Warning, "DRAW001", $"Expected coordinate"));
return(false);
}
return(true);
}
else
{
result = defaultValue;
return(false);
}
}
