private void Highlighting(object sender, TextChangedEventArgs e)
{
try
{ //ANTLRReaderStream input = new ANTLRReaderStream(Code.Document)
string text = new TextRange(Code.Document.ContentStart, Code.Document.ContentEnd).Text;
//ANTLRInputStream reader = new ANTLRInputStream(text);
ANTLRStringStream input = new ANTLRStringStream(text);
GrammarLexer lexer = new GrammarLexer((Antlr4.Runtime.ICharStream)input);
ITokenStream tokens = new CommonTokenStream((Antlr.Runtime.ITokenSource)lexer);
GrammarParser parser = new GrammarParser((Antlr4.Runtime.ITokenStream)tokens);
parser.prog();
}
catch (Exception ex)
{ }
}
// Public methods
public FeatureSelection Execute(CustomRule targetCustomRule)
{
// Get the expression
string expr = targetCustomRule.Expression; // OBS: an example for syntax: ">root.TotalScore=SumOf(>root.>descendants.ScoreValue)";
if (expr == null || expr == "")
{
return(null);
}
// Parse the expression
AntlrInputStream inputToParse = new AntlrInputStream(expr);
GrammarLexer lexer = new GrammarLexer(inputToParse);
CommonTokenStream tokens = new CommonTokenStream(lexer);
GrammarParser grammarParser = new GrammarParser(tokens);
IParseTree tree = grammarParser.prog();
Visitor visitor = new Visitor(configInstance);
// Execute it and return the parent FeatureSelection of the modified AttributeValue (left side of the expression)
var result = visitor.Visit(tree);
return(result as FeatureSelection);
}
