Re: [htmltmpl] Patch for userdefined escape subroutines in H::T

[David K. <da...@gi...>]

"Damien Clark" <d....@cq...> wrote:
> I would like to extend HTML::Template to allow the user to implement
> their own arbitrary escape functionality.   [...] I am proposing the
> following changes to the HTML::Template API and template format:
>
> . Extend the syntax for <tmpl_var escape=(JS,HTML,URL,NONE,1,0)> to
> include user provided attribute values.  Examples are probably more
> clear: <tmpl_var name=¹bla¹ escape=php>  or in my case <tmpl_var
> name=¹bla2¹ escape=sql>.
>
> . The constructor to take the option ³escape² with the value being a
> hashref.  The keys will be the escape names gives in the templates
> (e.g. php or sql) and the value a reference to a subroutine that is
> provided by the user to escape any special meanings to the syntax used
> in that context.

Very nice work, Damien!

+1 on the inclusion of this oft-requested feature!

I started to write the same patch a few years ago, thinking "this should be 
easy," but stumbled when I realized just how easy it wasn't :-)  Shortly 
thereafter Sam accepted Craig Manley's patch that added escape=JS (to the 
list of hard-coded escapes) and my immediate need for user-defined escaping 
went away.

But there have still been many times that I wished could "bolt on" a new 
escape=rot13 or something.  We can filter the template with our own 
arbitrary code, so it would be great to have the capability to also filter 
the data.

-dave

PS: kudos too, for including tests!