Wow, thanks for the guidance, Enlive is improving at a rapid clip! ;)
On Friday, April 17, 2009, Christophe Grand <christo...@cgrand.net> wrote:
>
> Updating to reflect last changes:
>
> (def snipgets
> (let [divs (select (html-resource "widget.html")
> [[:div (attr? :tiptree:widget)]])]
> (into {}
> (for [div divs]
> [(-> div :attrs :tiptree:widget)
> (snippet div [root]
> [widget]
> [:div.value] (content (if widget
> (:value widget)
> "foo")))))))
>
>
>
> Christophe Grand a écrit :
>> select, snippet, at and template are macro sugar. If you _really_ want
>> to use first-class selectors then you'll have to deal directly with
>> states machines and use at*, select* and snippet* (I'm going to improve
>> their usability).
>>
>> While selectors aren't first class, they can be parametrized (as you did
>> in [[:div (attr= :tiptree:widget (str widgetType))]]). You can play with
>> compile-selector to see how selectors are expanded.
>>
>> Regarding your code, I'd like to warn you against using snippet like
>> that for performance reason (and it won't get any better when I make
>> templates rendering faster).
>> It's better to extract snippets once for all:
>>
>> (def snipgets
>> (let [divs (mapcat #(select % [[:div (attr? :tiptree:widget)]])
>> (html-resource "widget.html"))]
>> (into {}
>> (for [div divs]
>> [(-> div :attrs :tiptree:widget)
>> (snippet div [root]
>> [widget]
>> [:div.value] (content (if widget
>> (:value widget)
>> "foo")))))))
>>
>> (deftemplate my-app6 "app2.html"
>> [widgets]
>> [[:div (attr? :tiptree:replace)]]
>> (fn [node]
>> (let [widgetType (:tiptree:replace (:attrs node))]
>> ((snipgets widgetType) ((keyword widgetType) widgets)))))
>>
>>
>> David Nolen a écrit :
>>
>>> On second thought, this is actually not that critical for what I'm
>>> trying to accomplish, and I'm not sure yet if I'll ever use such a
>>> feature. Macros that define snippets will probably suffice.
>>>
>>> (deftemplate my-app6 "app2.html"
>>> [widgets]
>>> [[:div (attr? :tiptree:replace)]]
>>> (fn [node]
>>> (let [widgetType (:tiptree:replace (:attrs node))]
>>> ((snippet "widget.html" [[:div (attr= :tiptree:widget (str widgetType))]]
>>> [widget]
>>> [:div.value] (content (if widget
>>> (:value widget)
>>> "foo")))
>>> ((keyword widgetType) widgets)))))
>>>
>>> (apply str
>>> (my-app6 {:widgetA {:value "0"},
>>> :widgetB {:value "1"}}))
>>>
>>> Works for me, and this was in general the use case I was thinking of.
>>>
>>>
>>> On Thu, Apr 16, 2009 at 4:24 PM, David Nolen <dnolen.li...@gmail.com
>>> <mailto:dnolen.li...@gmail.com>> wrote:
>>>
>>> Because predicates in selectors no longer need to be quoted it
>>> seems you can't use Enlive selectors in a first class way with
>>> snippets:
>>>
>>> (let [aselector [[:div (attr= :tiptree:widget "widgetA")]]]
>>> ((snippet "widget.html" aselector
>>> [some-map]
>>> [:div.value] (content "foo")) {}))
>>>
>>> I believe this might be one of my final big requests :) I
>>> personally don't mind the quoted predicate forms, especially if
>>> this would simplify making selectors first class. This would
>>> allow templates to dynamically generate snippets based on the
>>> properties of a particular node.
>>>
>>> There's been a wild flurry of updates to Enlive recently and I am
>>> extremely excited about the possibilities. Enlive is an idea
>>> which should be ripped off by every web framework worth talking
>>> about! ;) Thanks again for creating and maintaining it.
>>>
>>> On Thu, Apr 16, 2009 at 7:15 AM, Christophe Grand
>>> <christo...@cgrand.net <mailto:christophe@
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