I have been playing with the ToDo example application and having fun
in manipulating XML.
With the <todo:list/> node I thought it would be good if the XHTML
designer could pass in some guidance to the doList(...) method used in
bind(..). ie. <todo:list singular="true">...</todo:list>
Looking over the bind code I noticed that the attributes are not
accessible without ending up changing the calcValue method's
signature. I did initially try to knock up a
case class FuncWithAttrBindParam(name: String, value: (NodeSeq,
MetaData) => NodeSeq) extends Tuple2(name, value) with BindParam
and a corresponding
case Some(ns : FuncWithAttrBindParam) =>
in in_bind(...), but it all looks like a huge kludge.
It strikes me as a little deficient to be able to utilise attributes
within the context of a snippet and yet not within a bind. I know bind
is quite embedded in lift now, but I think that this difference might
prove a little frustrating. I know one solution is to just create a
bind("todo", html,
"exclude" ->
ajaxCheckbox(QueryNotDone, v => {QueryNotDone(v); reDraw}),
"list" -> doList(reDraw, false) _,
"list_singular" -> doList(reDraw, true) _)
But I think from the XHtml designer's perspective that is counter
intuitive...
Thoughts?
------
It should be noted that this is different to the case class
FuncAttrBindParam(name: String, value: NodeSeq => NodeSeq, newAttr:
String) extends BindParam with BindWithAttr. Which interesting enough
has no corresponding SuperArrowAssoc -> method match. Maybe
def ->(t: Tuple2[String, NodeSeq]) = AttrBindParam(name, t._2, t._1)
def ->(t: Tuple2[String, NodeSeq => NodeSeq]) =
FuncAttrBindParam(name, t._2, t._1)
And maybe even...
def ->[T](t: Tuple2[String, T]) = FuncAttrBindParam(name, (name ->
t._2).calcValue _, t._1)
or
def ->[T](t: Tuple2[String, T]) = FuncAttrBindParam(name, (t._1 ->
t._2).calcValue _, t._1)
I'm not sure which is better on the last two... Just a thought.
Marc
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