Re: Web site i18n with Haunt

[Ricardo Wurmus <rekado@elephly.net>]

pelzflorian (Florian Pelz) <pelzflorian@pelzflorian.de> writes:

> I did not use SXPath.  This one still looks ugly:
>
> (div (@ (id "powered-by"))
>      ,@(__ "Powered by <link \
> url=\"https://www.gnu.org/software/guile/\">GNU Guile</link> and \
> <link url=\"https://haunt.dthompson.us/\">Haunt</link>."
>            `(link
>              . ,(lambda (tag attr text)
>                   (a-href
>                    (cadadr attr)
>                    text)))))
>
> I suppose I should have used SXPath for it to get the URL out of the
> (@ (url "…")) attribute?

Since the URL isn’t supposed to be translated I wouldn’t present it as
part of the translatable text, i.e. the string would be:

    Powered by <guile>GNU Guile</guile> and <haunt>Haunt</haunt>.

And then I’d apply the transformations:

    (foo s
     `(guile . ,(lambda (_ . contents)
                 (a-href "https://www.gnu.org/software/guile/" ,@contents)))
     `(haunt . ,(lambda (_ . contents)
                 (a-href "https://haunt.dthompson.us/" ,@contents))))

You could use sxpath to avoid cadadr, but it wouldn’t be less verbose:

    (foo s
     `(link . ,(lambda (_ attr contents)
                (a-href (car ((sxpath '(url *text*)) attr)) ,contents))))

(Correctly but annoyingly, “sxpath” always returns a list, so we still
need to unpack the URL from the result with “car”.)

sxpath takes a path as a list of symbols and returns a selector function
that takes a nodeset.  So the selector function applied to “attr” gets
us a list of all “*text*” nodes inside of a “url” node in the argument
“attr”.

--
Ricardo

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