[org-beamer] \alert

[org-beamer] \alert

[Sven Bretfeld]

Hi

Is there any Symbol in org-beamer for \alert{Text}? In presentations
\alert is recommended instead of italics. We could even think of
translating text enclosed in slashes / ... / to \alert{} by default in
the beamer class.

Anyway, thanks to all developers for this very useful new addon.

Greetings

Sven

Re: [org-beamer] \alert

[Eric S Fraga]

(mistakenly sent this only to the OP... resending to list as well)

At 24 Jan 2010 20:10:03 +0100,
Sven Bretfeld wrote:
> 
> Hi
> 
> Is there any Symbol in org-beamer for \alert{Text}? In presentations
> \alert is recommended instead of italics. We could even think of
> translating text enclosed in slashes / ... / to \alert{} by default in
> the beamer class.

There was a long discussion about this back in November on this
mailing list.  Essentially, you can add this functionality yourself:

--8<---------------cut here---------------start------------->8---
(setq org-emphasis-alist (quote (("*" bold "<b>" "</b>") 
      				 ("/" italic "<i>" "</i>")
      				 ("_" underline "<span style=\"text-decoration:underline;\">" "</span>")
      				 ("=" org-code "<code>" "</code>" verbatim)
      				 ("~" org-verbatim "<code>" "</code>" verbatim)
      				 ("+" (:strike-through t) "<del>" "</del>")
      				 ("@" org-warning "<b>" "</b>")))
      org-export-latex-emphasis-alist (quote 
      				       (("*" "\\textbf{%s}" nil)
      					("/" "\\emph{%s}" nil) 
      					("_" "\\underline{%s}" nil)
      					("+" "\\texttt{%s}" nil)
      					("=" "\\verb=%s=" nil)
      					("~" "\\verb~%s~" t)
      					("@" "\\alert{%s}" nil)))
      )
--8<---------------cut here---------------end--------------->8---

Note the last entry in each of these variables; the other elements in
each are their default values.

HTH,
eric

Re: [org-beamer] \alert

[Sven Bretfeld]

Hello Eric

Eric S Fraga <ucecesf@ucl.ac.uk> writes:

> There was a long discussion about this back in November on this
> mailing list.  

Oh sorry, I have missed that.

> Essentially, you can add this functionality yourself:

Thank you,

Sven

Re: [org-beamer] \alert

[Sébastien Vauban]

Hi Eric and Sven,

Eric S Fraga wrote:
> (mistakenly sent this only to the OP... resending to list as well)
>
> At 24 Jan 2010 20:10:03 +0100,
> Sven Bretfeld wrote:
>> 
>> Is there any Symbol in org-beamer for \alert{Text}? In presentations \alert
>> is recommended instead of italics. We could even think of translating text
>> enclosed in slashes / ... / to \alert{} by default in the beamer class.
>
> Essentially, you can add this functionality yourself:
>
> (setq org-emphasis-alist (quote (("*" bold "<b>" "</b>") 
>       				 ("/" italic "<i>" "</i>")
>       				 ("_" underline "<span style=\"text-decoration:underline;\">" "</span>")
>       				 ("=" org-code "<code>" "</code>" verbatim)
>       				 ("~" org-verbatim "<code>" "</code>" verbatim)
>       				 ("+" (:strike-through t) "<del>" "</del>")
>       				 ("@" org-warning "<b>" "</b>")))
>       org-export-latex-emphasis-alist (quote 
>       				       (("*" "\\textbf{%s}" nil)
>       					("/" "\\emph{%s}" nil) 
>       					("_" "\\underline{%s}" nil)
>       					("+" "\\texttt{%s}" nil)
>       					("=" "\\verb=%s=" nil)
>       					("~" "\\verb~%s~" t)
>       					("@" "\\alert{%s}" nil))))
>

That's what I'm using as well, but the problem is that it's not compatible
anymore with non-beamer LaTeX, the alert macro being unknown.

Would there be a way to conditionally translate @...@ to alert (if beamer) or
to emph (if not-beamer), so that we can still easily compile a document to one
or the other LaTeX "back-end", without having to customize variables in Emacs,
prior to a compilation to the other "back-end"?

I must admit I do not have clear specifications on how to tell Org about such
a config...

Best regards,
  Seb

-- 
Sébastien Vauban



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Re: Re: [org-beamer] \alert

[Eric S Fraga]

At Tue, 26 Jan 2010 16:06:27 +0100,
Sébastien Vauban wrote:
> Eric S Fraga wrote:
> > At 24 Jan 2010 20:10:03 +0100,
> > Sven Bretfeld wrote:
> >> 
> >> Is there any Symbol in org-beamer for \alert{Text}? In presentations \alert

[...]

> >       org-export-latex-emphasis-alist (quote 
> >       				       (("*" "\\textbf{%s}" nil)
> >       					("/" "\\emph{%s}" nil) 
> >       					("_" "\\underline{%s}" nil)
> >       					("+" "\\texttt{%s}" nil)
> >       					("=" "\\verb=%s=" nil)
> >       					("~" "\\verb~%s~" t)
> >       					("@" "\\alert{%s}" nil))))
> >
> 
> That's what I'm using as well, but the problem is that it's not compatible
> anymore with non-beamer LaTeX, the alert macro being unknown.

Very true.  I've never thought about this as my presentations are for
presentation only etc.  However, it would definitely be nice to have a
more general solution.

> Would there be a way to conditionally translate @...@ to alert (if beamer) or
> to emph (if not-beamer), so that we can still easily compile a document to one
> or the other LaTeX "back-end", without having to customize variables in Emacs,
> prior to a compilation to the other "back-end"?

The alist structure doesn't allow for embedded lisp code, as far as I
can tell.  It would obviously be easier if this structure could be
evaluated on the fly.

> I must admit I do not have clear specifications on how to tell Org about such
> a config...

The only suggestion I can come up with would be to modify this
variable using, for instance, the org-export-later-after-initial-vars-hook?

eric

Re: Re: [org-beamer] \alert

[Carsten Dominik]

On Jan 26, 2010, at 5:22 PM, Eric S Fraga wrote:

> At Tue, 26 Jan 2010 16:06:27 +0100,
> Sébastien Vauban wrote:
>> Eric S Fraga wrote:
>>> At 24 Jan 2010 20:10:03 +0100,
>>> Sven Bretfeld wrote:
>>>>
>>>> Is there any Symbol in org-beamer for \alert{Text}? In  
>>>> presentations \alert
>
> [...]
>
>>>      org-export-latex-emphasis-alist (quote
>>>      				       (("*" "\\textbf{%s}" nil)
>>>      					("/" "\\emph{%s}" nil)
>>>      					("_" "\\underline{%s}" nil)
>>>      					("+" "\\texttt{%s}" nil)
>>>      					("=" "\\verb=%s=" nil)
>>>      					("~" "\\verb~%s~" t)
>>>      					("@" "\\alert{%s}" nil))))
>>>
>>
>> That's what I'm using as well, but the problem is that it's not  
>> compatible
>> anymore with non-beamer LaTeX, the alert macro being unknown.
>
> Very true.  I've never thought about this as my presentations are for
> presentation only etc.  However, it would definitely be nice to have a
> more general solution.
>
>> Would there be a way to conditionally translate @...@ to alert (if  
>> beamer) or
>> to emph (if not-beamer), so that we can still easily compile a  
>> document to one
>> or the other LaTeX "back-end", without having to customize  
>> variables in Emacs,
>> prior to a compilation to the other "back-end"?
>
> The alist structure doesn't allow for embedded lisp code, as far as I
> can tell.  It would obviously be easier if this structure could be
> evaluated on the fly.
>
>> I must admit I do not have clear specifications on how to tell Org  
>> about such
>> a config...
>
> The only suggestion I can come up with would be to modify this
> variable using, for instance, the org-export-later-after-initial- 
> vars-hook?

Is there a LaTeX command that can figure out if it is running a beamer  
class?
If yes, a possible solution would be to redefine \alert in LaTeX when  
not doing BEAMER.

- Carsten

Re: Re: [org-beamer] \alert

[Eric S Fraga]

At Thu, 28 Jan 2010 18:58:38 +0100,
Carsten Dominik wrote:

[...]

> 
> Is there a LaTeX command that can figure out if it is running a beamer
> class?
> If yes, a possible solution would be to redefine \alert in LaTeX when
> not doing BEAMER.
> 
> - Carsten
> 

This must be possible but my latex (and tex) programming capabilities
are even worse than my elisp... :(

For any LaTeX expert out there, is there an easy way to determine
whether a particular macro has been defined?  If so, we wouldn't even
need to check for beamer, simply for \alert.

Re: Re: [org-beamer] \alert

[Tim Burt]

Eric S Fraga writes:
 > At Thu, 28 Jan 2010 18:58:38 +0100,
 > Carsten Dominik wrote:
 > 
 > [...]
 > 
 > > 
 > > Is there a LaTeX command that can figure out if it is running a beamer
 > > class?
 > > If yes, a possible solution would be to redefine \alert in LaTeX when
 > > not doing BEAMER.
 > > 
 > > - Carsten
 > > 
 > 
 > This must be possible but my latex (and tex) programming capabilities
 > are even worse than my elisp... :(
 > 
 > For any LaTeX expert out there, is there an easy way to determine
 > whether a particular macro has been defined?  If so, we wouldn't even
 > need to check for beamer, simply for \alert.

Use the 
  \ifx<command>\undefined ... \else ... \fi 
construct to determine if a command already exists, and then to take
action in the appropriate case.  Test the example below both as-is and
with the first ~\newcommand*{\thisalert}~ commented out to see the
different results.

: \documentclass{article}
: \newcommand*{\thisalert}{Do this.}
: % Test for existence of \thisalert.
: % Create or modify the command accordingly.
: \ifx\thisalert\undefined%
: \newcommand*{\thisalert}{Do that.}%
: \else%
: \renewcommand*{\thisalert}{Do this differently.}
: \fi
: \begin{document}
: 
: \thisalert
: 
: \end{document}

I hope this is of use,
Tim

 > 
 > 
 > _______________________________________________
 > Emacs-orgmode mailing list
 > Please use `Reply All' to send replies to the list.
 > Emacs-orgmode@gnu.org
 > http://lists.gnu.org/mailman/listinfo/emacs-orgmode

Re: Re: [org-beamer] \alert

[Eric S Fraga]

At Fri, 29 Jan 2010 06:26:21 -0500,
Tim Burt wrote:
> Eric S Fraga writes:
>  > For any LaTeX expert out there, is there an easy way to determine
>  > whether a particular macro has been defined?  If so, we wouldn't even
>  > need to check for beamer, simply for \alert.
> 
> Use the 
>   \ifx<command>\undefined ... \else ... \fi 
> construct to determine if a command already exists, and then to take
> action in the appropriate case.  Test the example below both as-is and
> with the first ~\newcommand*{\thisalert}~ commented out to see the
> different results.

[...]

> I hope this is of use,
> Tim

Thanks Tim.  Very helpful indeed!  

The following org-mode line does the job for me:

#+latex_header: \ifx\alert\undefined\let\alert\textbf\fi

If \alert is not defined, I have =alert= behave as =textbf=.
Alternatively, something like this also works:

#+latex_header: \ifx\alert\undefined\newcommand*{\alert}[1]{\textbf{#1}}\fi

in case one wants more control (e.g. could also change the colour to red).

eric

Re: [org-beamer] \alert

[Sébastien Vauban]

Hi Eric, Tim, Carsten and all,

Eric S Fraga wrote:
> At Fri, 29 Jan 2010 06:26:21 -0500, Tim Burt wrote:
>> Eric S Fraga writes:
>>> For any LaTeX expert out there, is there an easy way to determine whether
>>> a particular macro has been defined? If so, we wouldn't even need to check
>>> for beamer, simply for \alert.
>> 
>> Use the 
>>   \ifx<command>\undefined ... \else ... \fi 
>> construct to determine if a command already exists, and then to take action
>> in the appropriate case. Test the example below both as-is and with the
>> first ~\newcommand*{\thisalert}~ commented out to see the different
>> results.

Thanks to all. This is great stuff...


> The following org-mode line does the job for me:
>
> #+latex_header: \ifx\alert\undefined\let\alert\textbf\fi
>
> If \alert is not defined, I have =alert= behave as =textbf=.

Could this somehow made part of Org-mode, so that one does not need to repeat
this one-liner in every file that could be exported to pure LaTeX and/or
Beamer?

Best regards,
  Seb

-- 
Sébastien Vauban



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Re: Re: [org-beamer] \alert

[Carsten Dominik]

On Jan 29, 2010, at 4:36 PM, Sébastien Vauban wrote:

> Hi Eric, Tim, Carsten and all,
>
> Eric S Fraga wrote:
>> At Fri, 29 Jan 2010 06:26:21 -0500, Tim Burt wrote:
>>> Eric S Fraga writes:
>>>> For any LaTeX expert out there, is there an easy way to determine  
>>>> whether
>>>> a particular macro has been defined? If so, we wouldn't even need  
>>>> to check
>>>> for beamer, simply for \alert.
>>>
>>> Use the
>>>  \ifx<command>\undefined ... \else ... \fi
>>> construct to determine if a command already exists, and then to  
>>> take action
>>> in the appropriate case. Test the example below both as-is and  
>>> with the
>>> first ~\newcommand*{\thisalert}~ commented out to see the different
>>> results.
>
> Thanks to all. This is great stuff...
>
>
>> The following org-mode line does the job for me:
>>
>> #+latex_header: \ifx\alert\undefined\let\alert\textbf\fi
>>
>> If \alert is not defined, I have =alert= behave as =textbf=.
>
> Could this somehow made part of Org-mode, so that one does not need  
> to repeat
> this one-liner in every file that could be exported to pure LaTeX  
> and/or
> Beamer?

Yes - this is in there now.  Let's see if someone complains.

- Carsten

Re: Re: [org-beamer] \alert

[Karsten Heymann]

Hi,

i just catched up reading the org list, and I think I can contribute to
this:

Carsten Dominik <carsten.dominik@gmail.com> writes:
> Is there a LaTeX command that can figure out if it is running a beamer
> class?
> If yes, a possible solution would be to redefine \alert in LaTeX when
> not doing BEAMER.

The LaTeX Command \providecommand behaves exactly like \newcommand iff
the command does not already exist, so one (untested) solution would be

\providecommand{\alert}[1]{\emph{#1}}

I think this would be the cleanest way, but keep in mind that the
special <> beamer parameters are not supported by standard latex
command creation commands.

Yours
Karsten

Re: Re: [org-beamer] \alert

[Carsten Dominik]

This is also a very nice solution, thank you, I will be using it.

- Carsten

On Feb 3, 2010, at 9:31 AM, Karsten Heymann wrote:

> Hi,
>
> i just catched up reading the org list, and I think I can contribute  
> to
> this:
>
> Carsten Dominik <carsten.dominik@gmail.com> writes:
>> Is there a LaTeX command that can figure out if it is running a  
>> beamer
>> class?
>> If yes, a possible solution would be to redefine \alert in LaTeX when
>> not doing BEAMER.
>
> The LaTeX Command \providecommand behaves exactly like \newcommand iff
> the command does not already exist, so one (untested) solution would  
> be
>
> \providecommand{\alert}[1]{\emph{#1}}
>
> I think this would be the cleanest way, but keep in mind that the
> special <> beamer parameters are not supported by standard latex
> command creation commands.
>
> Yours
> Karsten
>
>
> _______________________________________________
> Emacs-orgmode mailing list
> Please use `Reply All' to send replies to the list.
> Emacs-orgmode@gnu.org
> http://lists.gnu.org/mailman/listinfo/emacs-orgmode

- Carsten

Re: Re: [org-beamer] \alert

[Sven Bretfeld]

Hi all

I have been away for a week. Thanks for implementing this. Haven't tried
it yet.

Greetings

Sven

Carsten Dominik <carsten.dominik@gmail.com> writes:

> This is also a very nice solution, thank you, I will be using it.
>
> - Carsten
>
> On Feb 3, 2010, at 9:31 AM, Karsten Heymann wrote:
>
>> Hi,
>>
>> i just catched up reading the org list, and I think I can contribute
>> to
>> this:
>>
>> Carsten Dominik <carsten.dominik@gmail.com> writes:
>>> Is there a LaTeX command that can figure out if it is running a
>>> beamer
>>> class?
>>> If yes, a possible solution would be to redefine \alert in LaTeX when
>>> not doing BEAMER.
>>
>> The LaTeX Command \providecommand behaves exactly like \newcommand iff
>> the command does not already exist, so one (untested) solution would
>> be
>>
>> \providecommand{\alert}[1]{\emph{#1}}
>>
>> I think this would be the cleanest way, but keep in mind that the
>> special <> beamer parameters are not supported by standard latex
>> command creation commands.
>>
>> Yours
>> Karsten
>>
>>
>> _______________________________________________
>> Emacs-orgmode mailing list
>> Please use `Reply All' to send replies to the list.
>> Emacs-orgmode@gnu.org
>> http://lists.gnu.org/mailman/listinfo/emacs-orgmode
>
> - Carsten
>
>
>
>
>
> _______________________________________________
> Emacs-orgmode mailing list
> Please use `Reply All' to send replies to the list.
> Emacs-orgmode@gnu.org
> http://lists.gnu.org/mailman/listinfo/emacs-orgmode
>



-- 
Mit freundlichen Grüßen

Sven Bretfeld

___________________________________
Prof. Dr. Sven Bretfeld
      \ CEntrum für
CERES  \ REligionswissenschaftliche
________\_Studien__________________
Ruhr-Universität Bochum
Universitätsstraße 150
D-44780 Bochum
http://www.ruhr-uni-bochum.de/ceres/de/organisation/beteiligte/sven_bretfeld.html