[web-devel] missing web component needed: server-side page control

[Michael Snoyman]

Sounds interesting. I just released Yesod 0.3.0, and had in mind that 0.4.0
will focus on a concept I was calling widgets. It sounds very similar to
what you're talking about here, so I would definitely be interested in
collaborating with you.

I'm not sure if writing DOM manipulation code ourselves is necessarily the
right approach. It might make more sense to simply leverage an existing
Javascript library (my personal preference being jQuery).

I have to get back to "real work" for the rest of the day, but I'd like to
hear any other thoughts you have on the subject.

Michael

On Tue, Jun 22, 2010 at 2:23 PM, Alberto G. Corona <agocorona at gmail.com>wrote:

> Hi web haskellers.
> A few days ago I mention the need to have  server-side page control
> available in Haskell. ASP.NET and JavaServer Faces have it.
> I would like to collaborate with anyone of you interested. I have not
> much time now but this can change in the coming weeks so I want to
> know the interest on the subject in advance. I also want to receive
> comments to the development plan.
>
> The main advantages are:
>   -No Javascript, no Ajax needed when developing dynamic HTML pages
> (All code becomes pure haskell in the server!!)
>
>  -No errors in advanced dynamic HTML code: all is statically typed
> haskell (someone bets more?)
>
>   -Clear separation of HTML presentation from page control code
>
>   -Extensibility: makes possible to create custom controls, like HTML
> tables automatically generated from haskell containers etc
>
> All this will unleash the full power of haskell in the Web!!!
>
> It is compatible and orthogonal with page templating and all other web
> stuff. I think that it is a  two month work.
>
> basically what we have to do is the following:
>
>   0 develop a Haskell HTML DOM library. Just 31 objects to manage HTML
> trees
>      See the HTML DOM Objects Reference at
> http://www.w3schools.com/jsref/default.asp
>       I suppose that this is not yet done
>      Can make use of the XML structure defined in HXT
> http://hackage.haskell.org/package/hxt-8.5.2. HXT has namespace
>      support. This is needed for defining custom attributes and tags (4 and
> 5).
>
>     each HTML DOM method will do two basic things:
>           a) update a copy of the HTML page tree in the SERVER
>
>           b) send trough an Ajax channel the equivalent javascript
> method, that will be executed in the web browser
>
>    3 create a minimum javascript module that:
>         read Ajax responses and execute them in the web browser, for
> the above functionality
>         listen for events and forward them to the server trough Ajax.
>
>    4 define additional XML attributes to be interspersed in the HTML tree
> for
>        specifying url' s in the server where the server events will be
> forwarded  (for 3)
>           <button server:onclick="http://server/path...">
>
>    5 a mechanism for defining custom XML tags for extensibility: with
> the name, the parameters and the library code that handle it
>      example of custom tag inserted in the HTML: <t:table
> t:source="#{hasjkelldata} param1=......>
>
>   6 some templating that read 5 and produces a HTML tree and Haskell code.
>
>
> So, people, feel free to question anything. This is just the starting
> point to put ideas in the table and discuss all of this
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>
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