is there a macro to have backend-specific behavior?

is there a macro to have backend-specific behavior?

[Alan Schmitt]

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Hello,

Is there a way to define a macro that has different behaviors depending
on export backend? I have macros that use the @@latex:foo@@ syntax, but
in that case I "foo" is supposed to be literal latex.

My use case is this one: I have a link to a custom id, and I want to
export it as [[#id]] in latex and [[file:file.org::#id]] for html
*before* link resolution happens (so that the custom id in the latex
export is substituted with the correct label).

Is this possible?

Thanks,

Alan

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Re: is there a macro to have backend-specific behavior?

[Nicolas Goaziou]

Hello,

Alan Schmitt <alan.schmitt@polytechnique.org> writes:

> Is there a way to define a macro that has different behaviors depending
> on export backend? I have macros that use the @@latex:foo@@ syntax, but
> in that case I "foo" is supposed to be literal latex.
>
> My use case is this one: I have a link to a custom id, and I want to
> export it as [[#id]] in latex and [[file:file.org::#id]] for html
> *before* link resolution happens (so that the custom id in the latex
> export is substituted with the correct label).
>
> Is this possible?

Could you simply preprocess the document to export with a function doing
the change above? Functions in `org-export-before-parsing-hook' are
called with the back-end as the sole argument.

Regards,

-- 
Nicolas Goaziou

Re: is there a macro to have backend-specific behavior?

[Alan Schmitt]

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On 2018-02-01 13:02, Nicolas Goaziou <mail@nicolasgoaziou.fr> writes:

>> My use case is this one: I have a link to a custom id, and I want to
>> export it as [[#id]] in latex and [[file:file.org::#id]] for html
>> *before* link resolution happens (so that the custom id in the latex
>> export is substituted with the correct label).
>>
>> Is this possible?
>
> Could you simply preprocess the document to export with a function doing
> the change above? Functions in `org-export-before-parsing-hook' are
> called with the back-end as the sole argument.

Thank you for the suggestion, I think this is the simplest solution.

Best,

Alan

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Re: is there a macro to have backend-specific behavior?

[Adonay Felipe Nogueira]

> Is there a way to define a macro that has different behaviors depending
> on export backend? I have macros that use the @@latex:foo@@ syntax, but
> in that case I "foo" is supposed to be literal latex.

Perhaps this might do something similar  to what you expect:

--8<---------------cut here---------------start------------->8---
#+macro: make-hyperlink-to-custom-id (eval (cond ((org-export-derived-backend-p org-export-current-backend 'html) (concat "[[file:" (buffer-file-name) ":$1]]")) ((org-export-derived-backend-p org-export-current-backend 'latex) "[[$1]]") (t "[[$1]]")))
--8<---------------cut here---------------end--------------->8---

It could have been shorter, some other people might be able to help out.

There is a flaw though, since the branch from the 'html conditional
returns an absolute path, and I don't know if this is what you want, and
it of course refers to the Org mode original document as you asked ---
that is: it won't link to the object in the HTML that actually has that
custom identity.

I hope this helps.

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