On Jan 6, 7:15 pm, "David Pollak" <[email protected]>
wrote:
> I also added
> BindHelpers.attr("tag"): Option[NodeSeq]
> so you can do something like:
>
> <span class={BindHelpers.attr("class")>...</span>
>
> and:
> BindHelpers.attr("prefix", "tag")
I think it is committed to curAttr which personally I'm not a fan ...
Doyou mind if I change it to attr or nodeAttr ?
>
> Thanks,
>
> David
>
> On Tue, Jan 6, 2009 at 9:13 AM, Marius <[email protected]> wrote:
>
> > Very cool Dave !
>
> > thx,
> > Marius
>
> > On Jan 6, 4:36 pm, "David Pollak" <[email protected]>
> > wrote:
> > > Folks,
>
> > > I'm about to commit up a non-breaking solution.
>
> > > In bind, you can call:
> > > BindHelpers.bindNodes.value: List[NodeSeq]
> > > BindHelpers.currentNode.value: Elem
>
> > > bindNodes is a list of the nodes that were passed into bind with the more
> > > current node at the head of the list. If you're doing hierarchical
> > binding,
> > > you can see all the nodes that were passed into bind this was.
>
> > > currentNode is available to the BindParam and it contains the parent Elem
> > to
> > > the NodeSeq that was passed into your BindParam. You can inspect
> > attributes
> > > to your heart's content.
>
> > > Give it an hour or two for these changes to make their way through
> > Hudson.
>
> > > Thanks,
>
> > > David
>
> > > On Tue, Jan 6, 2009 at 4:50 AM, Marc Boschma
> > > <[email protected] <marc%[email protected]><
> > marc%[email protected] <marc%[email protected]>>
>
> > > > wrote:
>
> > > > I've just had a thought as to how to make it not a breaking change.
>
> > > > Leave your change "calcValue(s.child) I just call calcValue(s)"
>
> > > > change:
> > > > case class FuncBindParam(name: String, value: NodeSeq => NodeSeq)
> > > > extends Tuple2(name, value) with BindParam {
> > > > def calcValue(in: NodeSeq): NodeSeq = value(in)
> > > > }
>
> > > > to:
> > > > case class FuncBindParam(name: String, value: NodeSeq => NodeSeq)
> > > > extends Tuple2(name, value) with BindParam {
> > > > def calcValue(in: NodeSeq): NodeSeq = value(in.child)
> > > > }
>
> > > > That should prevent old code breaking... which would be a good
> > > > thing(tm) given the amount of code that uses bind(...)
>
> > > > then create something like:
>
> > > > case class FuncMetaDataBindParam(name: String, value: (MetaData,
> > > > NodeSeq) => NodeSeq) extends Tuple2(name, value) with BindParam {
> > > > def calcValue(in: NodeSeq): NodeSeq = value(in.attributes,
> > > > in.child)
> > > > }
>
> > > > along with adding to class SuperArrowAssoc...
> > > > def ->(in: (MetaData, NodeSeq) => NodeSeq) =
> > > > FuncMetaDataBindParam(name, in)
>
> > > > That would be fairly clean...
>
> > > > -----
>
> > > > Maybe for those that actually want the full node add:
>
> > > > case class FuncBoxBindParam(name: String, value: Box(NodeSeq) =>
> > > > NodeSeq) extends Tuple2(name, value) with BindParam {
> > > > def calcValue(in: NodeSeq): NodeSeq = value(Full(in))
> > > > }
>
> > > > and you could go nuts and:
>
> > > > case class FuncPrefixAndLabelBindParam(name: String, value:
> > > > (String, String, NodeSeq) => NodeSeq) extends Tuple2(name, value) with
> > > > BindParam {
> > > > def calcValue(in: NodeSeq): NodeSeq = value(in.prefix, in.label,
> > > > in.child)
> > > > }
>
> > > > etc...
>
> > > > On 06/01/2009, at 10:51 PM, Marc Boschma wrote:
>
> > > > > (you can tel I'm sleeping well :/ - too hot)
>
> > > > > The toList function is one of David's (todo example app). I do love
> > > > > the ability to curry :)
>
> > > > > Marc
> > > > > On 06/01/2009, at 9:51 PM, Marius wrote:
>
> > > > >> On Jan 6, 12:47 pm, Marc Boschma
> > > > >> <[email protected]<marc%[email protected]>
> > <marc%[email protected] <marc%[email protected]>>>
> > > > wrote:
> > > > >>> A quick just before going to bed reaction is that your change would
> > > > >>> solve the issue.
>
> > > > >> Yeah it would ... (I mean it worked fine in my tests)
>
> > > > >>> It is interesting you focused on the "exclude" and not the
> > > > >>> "list" (which is what I have been playing with). I actually missed
> > > > >>> it
> > > > >>> was a similar case...
>
> > > > >> I just picked it randomly :) ... I've seen that you're using a
> > > > >> partially applied function doList ... (which I assume it is a
> > curried
> > > > >> function):)
>
> > > > >>> Regards,
>
> > > > >>> Marc
>
> > > > >>> On 06/01/2009, at 9:24 PM, Marius wrote:
>
> > > > >>>> I just did a minor modification to the lift code so the actual
> > > > >>>> node it
> > > > >>>> is passed to the BindParam and not its child. Now having:
>
> > > > >>>> bind("todo", html,
> > > > >>>> "exclude" -> {node:NodeSeq =>ajaxCheckbox
> > > > >>>> (QueryNotDone, v => {QueryNotDone(v); reDraw})}
> > > > >>>> ... )
>
> > > > >>>> and the markup <todo:exclude param="Dumb"/>
>
> > > > >>>> The node parameter to the anonymous function will be the
> > > > >>>> <todo:exclude> node and not its children. So now you can access
> > the
> > > > >>>> "param" attribute from node. The change was in in_bind function so
> > > > >>>> instead of calling calcValue(s.child) I just call calcValue(s)
>
> > > > >>>> Looking at the existent BindParams this change does not seem to
> > > > >>>> cause
> > > > >>>> side effects since the calcValue 'in' parameter is used only for
> > > > >>>> FuncXXXBindParam-s. The impact is that the user's function would
> > > > >>>> now
> > > > >>>> get the actual node (from which now he can extract attributes) and
> > > > >>>> not
> > > > >>>> the child nodes. But child nodes from the actual node are trivial
> > > > >>>> to
> > > > >>>> obtain.
>
> > > > >>>> I did not commit this change as I'd like to see other opinions to
> > > > >>>> see
> > > > >>>> if there is something that I missed somehow. If we get general
> > > > >>>> consensus of this change I can commit it right away and announce
> > > > >>>> it as
> > > > >>>> a "breaking change".
>
> > > > >>>> Thoughts?
>
> > > > >>>> Br's,
> > > > >>>> Marius
>
> > > > >>>> On Jan 6, 12:02 pm, Marius <[email protected]> wrote:
> > > > >>>>> A nice alternative would have been :
>
> > > > >>>>> bind("todo", html,
> > > > >>>>> "exclude" -> {node:NodeSeq =>ajaxCheckbox
> > > > >>>>> (QueryNotDone, v => {QueryNotDone(v); reDraw})}
> > > > >>>>> ... )
>
> > > > >>>>> But here the node impersonates the childNodes not the original
> > > > >>>>> node.
> > > > >>>>> So you still can not access the param attribute below
>
> > > > >>>>> <todo:exclude param="Dumb"/>
>
> > > > >>>>> but you can do it like:
>
> > > > >>>>> <todo:exclude ><meta param="dumb"/></todo:exclude>
>
> > > > >>>>> and you have full access to the meta node as it is a child of
> > > > >>>>> todo:exclude. Hence you can pass state.
>
> > > > >>>>> I know, it is not ideal but should be workable until snippet
> > > > >>>>> child-
> > > > >>>>> node attributes are exposed in one way or another.
>
> > > > >>>>> Br's,
> > > > >>>>> Marius
>
> > > > >>>>> Marc Boschma wrote:
> > > > >>>>>> 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
>
> > > --
> > > Lift, the simply functional web frameworkhttp://liftweb.net
> > > Collaborative Task Managementhttp://much4.us
> > > Follow
>
> ...
>
> read more »
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