CUSTOM_id ignored on blocks by ox-beamer

CUSTOM_id ignored on blocks by ox-beamer

[Rafael]

Consider the following example:

#+begin_src org
,#+title: Test

,#+options: H:2

,* Section
  :PROPERTIES:
  :CUSTOM_ID: section
  :END:

,** Frame
   :PROPERTIES:
   :CUSTOM_ID: frame
   :END:

,*** Block
    :PROPERTIES:
    :CUSTOM_ID: block
    :END:
#+end_src

If I export this to Beamer, then both section and frame get appropiate
labels, (either with org-latex-prefer-user-labels set to t or nil), but
the custom_id for block is completely ignored. I want to use theorems as
blocks in frames, so it would be very useful to me if the custom_id in
the block is exported as \label{block}. Is there a way to have this by
setting a variable, or something?

It works if I include #+beamer: \label{block} below the properties
drawer, but I would prefer not to duplicate the label, of course.

Best regards,
Rafael

Re: CUSTOM_id ignored on blocks by ox-beamer

[Nicolas Goaziou]

Hello,

Rafael <rvf0068@gmail.com> writes:

> Consider the following example:
>
> #+begin_src org
> ,#+title: Test
>
> ,#+options: H:2
>
> ,* Section
>   :PROPERTIES:
>   :CUSTOM_ID: section
>   :END:
>
> ,** Frame
>    :PROPERTIES:
>    :CUSTOM_ID: frame
>    :END:
>
> ,*** Block
>     :PROPERTIES:
>     :CUSTOM_ID: block
>     :END:
> #+end_src
>
> If I export this to Beamer, then both section and frame get appropiate
> labels, (either with org-latex-prefer-user-labels set to t or nil), but
> the custom_id for block is completely ignored. I want to use theorems as
> blocks in frames, so it would be very useful to me if the custom_id in
> the block is exported as \label{block}. Is there a way to have this by
> setting a variable, or something?
>
> It works if I include #+beamer: \label{block} below the properties
> drawer, but I would prefer not to duplicate the label, of course.

You may want to look into `org-beamer--format-block' and see if there's
an appropriate place to insert it, probably extending
`org-beamer--get-label' to handle non-frame cases along the way.

Regards,

-- 
Nicolas Goaziou

CUSTOM_id ignored on blocks by ox-beamer

[alan.schmitt]

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Hello,

I’m writing course slides in org-mode (exported currently to beamer, but
I want to also have html export in the long run), and I have trouble
linking blocks (for theorems or definitions), as the CUSTOM_ID property
is ignored by ox-beamer on blocks.

I see this issue has already been raised on the list
(https://list.orgmode.org/87lflg9ts2.fsf@nicolasgoaziou.fr/T/), and
looking at the code it seems that it still needs to be modified.
Unfortunately the code for org-beamer--format-block is quite complex and
I do not see how to change it to add a label. Could someone on the list
please give me a hand?

Best,

Alan

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