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Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil


From: David Maus
Subject: Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil)
Date: Mon, 20 Sep 2010 20:57:00 +0200
User-agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (Gojō) APEL/10.8 Emacs/23.2 (i486-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO)

Sébastien Vauban wrote:
>Hello,

>With current git pull, and such an Org file (in UTF-8 encoding):

> ...

>I get the following error when trying to export it via PDFLaTeX:

The problem is, that the 'É' character is not in Org's default list
for link escapes but `string-match' matches for the lower case
character.  Adding more chars to `org-link-escape-chars' would solve
the problem, but this seems to be a broder issue:

Regular links (URIs) are restricted to a special set of ASCII
characters and non-ascii chars are hex-encoded.  Currently Org escapes
links to Org mode headlines using the table mentioned above.  But Org
files and hence Org headlines might be Unicode, containing multibyte
characters that cannot be hex-escaped in the normal fashion.  

Maybe something like this would be a solution:

 - Org only escapes square brackets when escaping a link to an Org
   mode headline
 - `org-link-escape' uses a shotgun-approach: Every char that is not
   allowed according to the specs (Cf. RFC3986) is percent encoded if
   the link sequence does not contain multibyte chars; If the sequence
   does contain multibyte chars, `org-link-escape' produces an IRI
   (Cf. RFC3987).

HTH,
  -- David

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