Re: org-add-link-type

["Thomas S. Dye" <tsd@tsdye.com>]

Aloha Bastien,

Thanks for looking at this.  The problem isn't that the description is  
being protected from conversion, it is that it is there at all.  The  
link in the example lacks a description and the documentation says  
that in this case desc will be nil, so it was a surprise to find a  
value being passed instead.

In the example code (and desc) is supposed to evaluate false if the  
link lacks a description.  However, it never evaluates to false.

I'm using the following code now, which tests for both the documented  
and actual behavior when a description is absent from the link.

#+source: define-citet-link
#+begin_src emacs-lisp :results silent
   (org-add-link-type
    "citet" 'ebib
    (lambda (path desc format)
      (cond
       ((eq format 'latex)
        (if (or (not desc) (equal 0 (search "citet:" desc)))
              (format "\\citet{%s}" path)
              (format "\\citet[%s]{%s}" desc path)
)))))
#+end_src

All the best,
Tom


On Jan 17, 2011, at 8:35 AM, Bastien wrote:

> Hi Thomas,
>
> "Thomas S. Dye" <tsd@tsdye.com> writes:
>
>>  (org-add-link-type
>>   "citet" 'ebib
>>   (lambda (path desc format)
>>     (cond
>>      ((eq format 'latex)
>>       (if (and desc)
>>             (format "\\citet[%s]{%s}" desc path)
>>             (format "\\citet{%s}" path))))))
>>
>> [[citet:green84:_settl_patter_studies_ocean]]
>>
>> yields this:
>>
>> \citet[citet:green84:_settl\_patter\_studies\_ocean]
>> {green84:_settl_patter_studies_ocean}
>
> This is because "_" chars are usually protected from conversion in
> links, but the LaTeX exporter might be confused by links it doesn't
> know.
>
> What about this :
>
> (org-add-link-type
>   "citet" 'ebib
>   (lambda (path desc format)
>     (cond
>      ((eq format 'latex)
>       (if (and desc)
>             (org-export-latex-protect-string
> 	      (format "\\citet[%s]{%s}" desc path))
> 	 (org-export-latex-protect-string
> 	  (format "\\citet{%s}" path)))))))
>
> Check for other uses of `org-export-latex-protect-string' in
> org-latex.el to better understand in what contexts this function
> is useful.
>
> HTH,
>
> -- 
> Bastien