public override void AfterVisit(Statement statement)
{
var childEmitter = EmitterNode.Many(LeaveScope());
var listEmitter = _expressionVisitor.LeaveTreeScope(statement.Expression, childEmitter);
Scope.Add(listEmitter);
}
public override bool BeforeVisit(Statement statement)
{
_expressionVisitor.EnterScope(statement.Expression);
EnterScope();
return true;
}
public bool BeforeVisit(Statement statement)
{
var expression = statement.Expression;
var iterationExpression = expression as IterationExpression;
if (iterationExpression != null)
{
var scope = new Scope();
_scopes.Push(scope);
var visitor = new EmitExpressionVisitor(_dataBinder, new NullHelperBinder());
iterationExpression.Expression.Accept(visitor);
var context = _dataBinder.Context();
IEvaluator<IEnumerable> evaluator;
if (!context.TryCreateEvaluation(out evaluator))
return false;
Action<TextWriter, IDataContext, IRenderingContext> ext = (writer, dataContext, renderingContext) =>
{
var items = evaluator.Evaluate(dataContext);
foreach (var item in items)
{
}
};
scope.Elements.Add(ext);
//IEvaluator<string> evaluator;
//if (result.TryCreateEvaluation(out evaluator))
//{
// scope.Elements.Add((writer, dataContext, renderingContext) =>
// {
// var value = evaluator.Evaluate(dataContext);
// writer.Write(value);
// });
//}
}
return true;
}
private static void AssertDynamic(Statement expected, Statement actual)
{
HandlebarsExpressionAssert.AssertExpression(expected.Expression, actual.Expression);
AssertNodeList(expected.ChildNodes, actual.ChildNodes);
}
public virtual void AfterVisit(Statement statement)
{
}
public virtual bool BeforeVisit(Statement statement)
{
statement.Expression.Accept(_expressionVisitor);
return false;
}
public void AfterVisit(Statement statement)
{
var scope = _scopes.Peek();
var expression = statement.Expression;
var iterationExpression = expression as IterationExpression;
if (iterationExpression != null)
{
throw new NotImplementedException();
}
var conditionalExpression = expression as ConditionalExpression;
if (conditionalExpression != null)
{
throw new NotImplementedException();
}
var callHelperExpression = expression as CallHelperExpression;
if (callHelperExpression != null)
{
throw new NotImplementedException();
}
var memberExpression = expression as MemberExpression;
if (memberExpression != null)
{
var result = _dataBinder.Property(memberExpression.Name);
IEvaluator<string> evaluator;
if (result.TryCreateEvaluation(out evaluator))
{
scope.Elements.Add((writer, dataContext, renderingContext) =>
{
var value = evaluator.Evaluate(dataContext);
writer.Write(value);
});
}
return;
}
throw new NotImplementedException();
}
