public void Parse(CompileContext context, System.Xml.XmlNode node)
{
if (node.Attributes["Value"] != null)
{
ASTScalar scalar = new ASTScalar();
scalar.Parse(context, Token.StackForm(Token.Tokenize(node.Attributes["Value"].InnerText)));
data = scalar.Scalar;
}
else
{
throw new ParseException("Value of scalar not present in 'Value' attribute.");
}
}
public void Parse(CompileContext context, Stack <Token> stream)
{
float pixel = 0.0f, parent = 0.0f, canvas = 0.0f;
// We now parse until unknown token is found.
Token token;
while (true)
{
token = stream.Pop();
bool?sign = true;
// May be '+' or '-'.
if (token.TokenId == TokenId.Plus)
{
sign = true;
token = stream.Pop();
}
else if (token.TokenId == TokenId.Minus)
{
sign = false;
token = stream.Pop();
}
// We parse number.
if (token.TokenId != TokenId.Number)
{
stream.Push(token);
if (sign.HasValue)
{
throw new ParseException("Number expected after +/-");
}
break;
}
float number = float.Parse(token.Identifier);
string specifier = "p";
// We parse specifier
token = stream.Pop();
// We also allow '%' elements, id specifier is empty.
if (token.TokenId == TokenId.Percent)
{
if (token.TokenId == TokenId.Percent)
{
number *= 0.01f;
}
token = stream.Pop();
}
else if (token.TokenId == TokenId.Identifier)
{
specifier = token.Identifier;
token = stream.Pop();
}
if (sign.HasValue)
{
number *= sign.Value ? 1.0f : -1.0f;
}
// We apply values.
specifier = specifier.ToLower();
if (specifier == "p")
{
parent += number;
}
else if (specifier == "px")
{
pixel += number;
}
else if (specifier == "c")
{
canvas += number;
}
else
{
throw new ParseException("Scalar parsing failed: expected '', 'p', 'px' or 'c' specifier");
}
stream.Push(token);
// We now need '+', or we break it.
if (token.TokenId != TokenId.Plus && token.TokenId != TokenId.Minus)
{
break;
}
// We do not pop it, part of stream.
}
data = new GuiScalar(pixel, canvas, parent);
}
