[Nitro] [PATCH] Nitro Transformer

[Dimitri Aivaliotis]

Hi All,

I've made a new type of in-Controller compiler.  It will take an XHTML
template, and "transform" any element within it.  So, you can take any
standard XHTML file (layout), apply the transformation (code), and get
a true separation of layout and code within Nitro.  An example usage
is given in the in-file documentation.  I've used it to place content
(from a separate text file) into a certain "div", while changing the
"class" of an "a"-tag.

Some possible improvements:
- tie it into the Nitro compiler pipeline
- bind it into Nitro's caching mechanism
- get the "base" and "action" variables automatically

Currently, a just-transformed template will not be displayed to the
browser.  A walk of all transform-enabled URIs needs to be done first,
and then either all templates recompiled, or Nitro restarted in order
to serve up the transformed templates.  Let me know if you have a
solution to this.

Hope this helps someone else to solve the same kinds of problems I've
tried to solve.  Comments welcome!

- Dimitri
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