[Zope-CMF] Re: [dev] encoding of tool settings / CMFSetup

Florent Guillaume fg at nuxeo.com
Thu Sep 15 10:42:06 EDT 2005

Hi Yuppie,

> Is there any need to support tool settings with other encodings than 
> utf-8 (and ascii as a subset of utf-8)?

I think there is. Take for instance the portal property "title". It could 
very well be a non-ascii string, and contain accents. It could be (a) an str 
encoded in some charset, or (b) unicode.

If (a), then we can assume the charset specified by the portal property 
"default_charset" (with a default of "" meaning "latin-9" maybe), and 
re-encode to unicode before passing it to the export template.

Export is thus not a problem.

When importing though, we'll have a non-ascii utf-8 string and we have to 
decide if we're going to decode it to unicode or re-encode it to the 
default_charset. This has to be done according to the property type (for 
properties). For non-properties, I guess we could punt and say tough luck.

But I agree that there's no need to pass around an "encoding" attribute, XML 
is utf-8 and that's it.


> AFAICS there's not even a need for utf-8: Most settings are not visible 
> for users and those that are (like title and description of Actions and 
> type infos) can contain an ascii i18n message id.
> But supporting utf-8 would not cost us much extra and might help people 
> who don't use translations.
> See also http://www.zope.org/Collectors/CMF/292
> For CMFSetup/GenericSetup this would mean:
> All 'encoding' parameters, attributes and methods could be removed. The 
> XML files are anyway utf-8 encoded, so there would not be any need to 
> convert strings from one encoding to an other.
> (At the moment a hardcoded ascii encoding is passed around everywhere.)
> Cheers,
>     Yuppie
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Florent Guillaume, Nuxeo (Paris, France)   CTO, Director of R&D
+33 1 40 33 71 59   http://nuxeo.com   fg at nuxeo.com

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