[Zope3-dev] Re: ZPT Macros

[Tonico Strasser]

 >>Ok, I don't really understand what this all means. I have trivial use
 >>cases and don't understand why everything has to be so complicated.

Roger Ineichen schrieb:
 > It's only because the macros registration via ZCML and the TALES
 > expression isn't the right concept for what you where shoing at the
 > sprint.
 >
 > For your idea, you need to implement a custom page template where
 > provides a macros namspace. Then you can call macros in TAL like:
 >
 > <metal:block use-macro="macros/myMacro" />
 >
 > If we like to use the standard page template we don't have this
 > "macro" namespace and need a TALES expression for the macro
 > lookup like:
 >
 > <metal:block use-macro="macros:myMacro" />
 >
 > Right now without a macros ZCML directive we use macros via a
 > additional page (view) hook like:
 >
 > <metal:block use-macro="context/@@macros/myMacro" />
 >
 > In this case the "@@macros" is a view registred with a own python
 > class inherited from the class Macros. Most the time called
 > StandardMacros (see Rotterdam skin).
 >
 > I only propose to get rid of this additional python class
 > implementation and view registration and like to offer a
 > ZCML directive and a TALES namespace explicit for macros.

Ok, got it :)

You want to support browser:page's template="some.pt" which is a 
ViewPageTemplateFile and has an immutable namespace when used as view 
from a browser:page directive.

Interesting, I have been believing that it is straighter to pass a dict 
to a page template than creating a new expression type. Thanks for the 
explanation.

Tonico