//TODO int/no decimal option?
private NumberToken scanNumericLiteral()
{
var text = "";
var hasDecimal = false;
char c;
while (_tokenizer.TryRead(out c))
{
if (c == '.')
{
if (hasDecimal)
{
throw new FormatException("Numeric literal cannot contain two decimals.");
}
hasDecimal = true;
text += c;
}
else if (char.IsDigit(c))
{
text += c;
}
else if (char.IsWhiteSpace(c) || c == '\0')
{
break;
}
else
{
break;
//throw new FormatException("Invalid character in numeric literal.");
}
}
return(new NumberToken(text));
}
private IdentiferToken scanIdentifer()
{
var text = "";
var isFirst = true;
char c;
while (_tokenizer.TryRead(out c))
{
if (isFirst)
{
isFirst = false;
if (char.IsDigit(c))
{
throw new FormatException(
$"The character {c.SQuote()} is not valid. An identifier must start with a letter.");
}
if (char.IsLetter(c))
{
text += c;
}
else
{
throw new FormatException(
$"The character {c.SQuote()} is not valid. An identifier must start with a letter.");
}
}
else
{
if (char.IsLetterOrDigit(c) || c == '-')
{
text += c;
}
else
{
break;
}
}
}
if (string.IsNullOrWhiteSpace(text))
{
throw new FormatException(
$"The text \"{text}\" is not a valid identifier because it is null or whitespace.");
}
_tokenizer.Step(-1);
return(new IdentiferToken(text));
}
public TextualStyle Parse()
{
var textualStyle = new TextualStyle
{
//ForegroundDescriptor = new LiteralMaterialDescriptor(Palette.Blue.P600)
};
var selectorExpressionParts = _expression.Split(' ');
foreach (var selectorExpressionPart in selectorExpressionParts)
{
_tokenizer = new TokenizerOld(selectorExpressionPart);
_tokenizer.SkipWhiteSpace();
var beginFrame = _tokenizer.GetFrame();
char c;
if (!_tokenizer.TryRead(out c))
{
throw new FormatException("Could not read from tokenizer.");
}
var cl = char.ToLower(c);
if (cl == 't')
{
var frame = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Unexpected character(s) after \'t\' fontweight flag");
}
textualStyle.SetValue(TextualStyle.FontWeightProperty, FontWeights.Thin);
}
else if (cl == 'l')
{
var frame = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Unexpected character(s) after \'l\' fontweight flag");
}
textualStyle.SetValue(TextualStyle.FontWeightProperty, FontWeights.Light);
}
else if (cl == 'm')
{
var frame = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Unexpected character(s) after \'m\' fontweight flag");
}
textualStyle.SetValue(TextualStyle.FontWeightProperty, FontWeights.Medium);
}
else if (cl == 'b')
{
var frame = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Unexpected character(s) after \'b\' fontweight flag");
}
textualStyle.SetValue(TextualStyle.FontWeightProperty, FontWeights.Bold);
}
else if (cl == 'h')
{
var frame = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Unexpected character(s) after \'h\' fontweight flag");
}
textualStyle.SetValue(TextualStyle.FontWeightProperty, FontWeights.Heavy);
}
else if (cl == 'o')
{
var frame = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Unexpected character(s) after \'o\' fontstyle flag");
}
textualStyle.SetValue(TextualStyle.FontStyleProperty, FontStyles.Oblique);
}
else if (cl == 'i')
{
var frame = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Unexpected character(s) after \'i\' fontstyle flag");
}
textualStyle.SetValue(TextualStyle.FontStyleProperty, FontStyles.Italic);
}
else if (c == '-' || cl == 'p' || cl == 'a')
{
//TODO use new method .GetInsance for all code behind uses of Singleton xamlconverters
var descriptorConverter = new MaterialDescriptorConverter();
_tokenizer.Step(-1);
var frame = _tokenizer.GetFrame();
var strValue = scanUntil('#', false);
var value = descriptorConverter.ConvertFrom(strValue) as AbstractMaterialDescriptor;
textualStyle.SetValue(TextualStyle.ForegroundDescriptorProperty, value);
}
// SET TEXTROTATION PROPERTY
else if (cl == 'r')
{
TextRotation textRotation;
var frame = _tokenizer.GetFrame();
char c3;
if (!_tokenizer.TryRead(out c3))
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Expected rotation direction after \'r\' character. (\'r\' or \'l\').");
}
var c3l = char.ToLower(c3);
if (c3l == 'r')
{
_tokenizer.SkipWhiteSpace();
var frame2 = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame2) +
$"Unexpected character(s) after rotation direction.");
}
textRotation = TextRotation.Right;
}
else if (c3l == 'l')
{
_tokenizer.SkipWhiteSpace();
var frame2 = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame2) +
$"Unexpected character(s) after rotation direction.");
}
textRotation = TextRotation.Left;
}
else if (c3l == 'r')
{
_tokenizer.SkipWhiteSpace();
var frame2 = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame2) +
$"Unexpected character(s) after rotation direction.");
}
textRotation = TextRotation.None;
}
else
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Unexpected rotation direction. Must be either \'l\', \'n\', or \'r\'.");
}
textualStyle.SetValue(TextualStyle.TextRotationProperty, textRotation);
}
else if (char.IsDigit(c) || c == '.')
{
_tokenizer.Step(-1);
var numericLiteral = scanNumericLiteral();
_tokenizer.Step(-1);
_tokenizer.SkipWhiteSpace();
var frame3 = _tokenizer.GetFrame();
char c2;
if (!_tokenizer.TryRead(out c2))
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame3) +
$"Expected font size unit type (\'em\' or \'%\') after relative font size numeric literal");
}
var c2l = char.ToLower(c2);
if (c2l == '%')
{
_tokenizer.SkipWhiteSpace();
var frame2 = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame2) +
$"Unexpected character(s) after font size unit type");
}
var numericValue = double.Parse(numericLiteral.LiteralValue) / 100;
textualStyle.SetValue(TextualStyle.RelativeFontSizeProperty, numericValue);
}
else if (c2l == 'e')
{
char c3;
if (!_tokenizer.TryRead(out c3))
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame3) +
$"Expected font size unit type (\'em\' or \'%\') after relative font size numeric literal");
}
var c3l = char.ToLower(c3);
if (c3l == 'm')
{
_tokenizer.SkipWhiteSpace();
var frame2 = _tokenizer.GetFrame();
if (_tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame2) +
$"Unexpected character(s) after font size unit type");
}
var numericValue = double.Parse(numericLiteral.LiteralValue);
textualStyle.SetValue(TextualStyle.RelativeFontSizeProperty, numericValue);
}
else
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame3) +
$"Unexpected font size unit type. Must be either \'em\' or \'%\'");
}
}
else
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame3) +
$"Unexpected unit type. Must be either \'em\' or \'%\'");
}
_tokenizer.SkipWhiteSpace();
var frame = _tokenizer.GetFrame();
if (_tokenizer.Step(1) && _tokenizer.HasMore())
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(frame) +
$"Unexpected character(s).");
}
}
else
{
throw new FormatException(
_tokenizer.GetExceptionRangeText(beginFrame) +
$"Invalid character(s) in textualstyle expression.");
}
}
return(textualStyle);
}