[Zope3-dev] RFC: Content Providers and Viewlets

[Gary Poster]

On Oct 16, 2005, at 9:42 AM, Stephan Richter wrote:

> On Sunday 16 October 2005 09:01, Gary Poster wrote:
>
>>> Let's say the content provider package offers the concept and the
>>> viewlet package offers a implementation which depends on page
>>> templates.
>>>
>>
>> OK, that makes sense.  The contentprovider package offers up two
>> bits, then: the pattern of looking up by (context, request, view),
>> and the TALES directive.  It sounds like your division of
>> contentprovider and viewlet was directly to support your use of
>> another template language--which is not going to need the TALES
>> directive?
>>
>
> The viewlet manager is just a content provider, it thus integrates  
> nicely with
> TAL and TALES.

Absolutely; I understand the necessity of the TAL/TALES stuff for the  
viewlet package.  I was questioning the TALES directive being placed  
in the contentprovider package, since the only use case Roger  
mentioned for the contentprovider package (as separate from viewlet)   
didn't need it.  That suggests it perhaps could be pushed up into  
viewlet, since there appears to be no coherent story for use of the  
contentprovider package in TALES without the code in viewlet.  So  
just move the TALES into viewlet with the rest of it, and leave only  
the interfaces for the multiadapter lookup in contentprovider.

If my objections on this point merely lead to a compelling bit of  
elaboration in contentprovider's README as to when and why one might  
use contentprovider without viewlet (i.e., "this package is useful  
when you aren't using ZPTs but want the basic pattern used by the  
viewlet package, or when [...some other story that explains why the  
TALES code is there...]") then I will regard my time providing  
feedback on this part of the proposal as well-spent.

> BTW, I am going to respond to your longer mail later.

Excellent, thanks.

Gary