private boolean appendFunctionExpression(FunctionExpression node) {
cssOnly.append(node.getName());
cssOnly.append('(');
append(node.getParameter());
cssOnly.append(')');
return true;
}
@Override
public Expression evaluate(
List<Expression> parameters,
ProblemsHandler problemsHandler,
FunctionExpression call,
Expression evaluatedParameter) {
if (parameters.size() > 1)
problemsHandler.wrongNumberOfArgumentsToFunction(call.getParameter(), call.getName(), 1);
Expression parameter = parameters.get(0);
if (checkType(parameter)) {
return new IdentifierExpression(parameter.getUnderlyingStructure(), "true");
} else {
return new IdentifierExpression(parameter.getUnderlyingStructure(), "false");
}
}
public String extractFilename(
Expression urlInput, ProblemsHandler problemsHandler, Configuration configuration) {
ExpressionEvaluator expressionEvaluator =
new ExpressionEvaluator(problemsHandler, configuration);
Expression urlExpression = expressionEvaluator.evaluate(urlInput);
if (urlExpression.getType() != ASTCssNodeType.FUNCTION)
return toJavaFileSeparator(contentToString(urlExpression));
// this is the only place in the compiler that can interpret the url function
FunctionExpression function = (FunctionExpression) urlExpression;
if (!"url".equals(function.getName().toLowerCase())) return null;
List<Expression> parameters =
expressionEvaluator.evaluate(function.getParameter()).splitByComma();
if (parameters.isEmpty()) return null;
return toJavaFileSeparator(contentToString(parameters.get(0)));
}