private static void IterateEnumerable(BindingContext context,
BlockParamsValueProvider blockParamsValueProvider,
IEnumerable target,
Action <BindingContext, TextWriter, object> template,
Action <BindingContext, TextWriter, object> ifEmpty)
{
using (var iterator = IteratorValueProvider.Create())
{
blockParamsValueProvider?.Configure(BlockParamsEnumerableConfiguration, iterator);
iterator.Index = 0;
var enumerable = new ExtendedEnumerable <object>(target);
bool enumerated = false;
foreach (var enumerableValue in enumerable)
{
enumerated = true;
iterator.Value = enumerableValue.Value;
iterator.First = enumerableValue.IsFirst;
iterator.Last = enumerableValue.IsLast;
using (var innerContext = context.CreateChildContext(iterator.Value))
{
innerContext.RegisterValueProvider(iterator);
template(context, context.TextWriter, innerContext);
innerContext.UnregisterValueProvider(iterator);
}
}
if (iterator.Index == 0 && !enumerated)
{
ifEmpty(context, context.TextWriter, context.Value);
}
}
}
private static void IterateObject(BindingContext context,
ObjectDescriptor descriptor,
BlockParamsValueProvider blockParamsValueProvider,
object target,
IEnumerable <object> properties,
Type targetType,
Action <BindingContext, TextWriter, object> template,
Action <BindingContext, TextWriter, object> ifEmpty)
{
using (var iterator = ObjectEnumeratorValueProvider.Create(context.Configuration))
{
blockParamsValueProvider?.Configure(BlockParamsObjectEnumeratorConfiguration, iterator);
iterator.Index = 0;
var accessor = descriptor.MemberAccessor;
var enumerable = new ExtendedEnumerable <object>(properties);
bool enumerated = false;
foreach (var enumerableValue in enumerable)
{
enumerated = true;
iterator.Key = enumerableValue.Value.ToString();
var key = iterator.Key.Intern();
iterator.Value = accessor.TryGetValue(target, targetType, key, out var value) ? value : null;
iterator.First = enumerableValue.IsFirst;
iterator.Last = enumerableValue.IsLast;
iterator.Index = enumerableValue.Index;
using (var innerContext = context.CreateChildContext(iterator.Value))
{
innerContext.RegisterValueProvider(iterator);
template(context, context.TextWriter, innerContext);
innerContext.UnregisterValueProvider(iterator);
}
}
if (iterator.Index == 0 && !enumerated)
{
ifEmpty(context, context.TextWriter, context.Value);
}
}
}
