From: David Maus <dmaus@ictsoc.de>
To: Sebastian Rose <sebastian_rose@gmx.de>
Cc: "David Maus" <dmaus@ictsoc.de>,
emacs-orgmode@gnu.org,
"Sébastien Vauban" <wxhgmqzgwmuf@spammotel.com>
Subject: Re: [bug] org-link-escape and (wrong-type-argument stringp nil)
Date: Sun, 26 Sep 2010 20:22:46 +0200 [thread overview]
Message-ID: <87bp7kicuh.wl%dmaus@ictsoc.de> (raw)
In-Reply-To: <87d3s48c8c.fsf@gmx.de>
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Sebastian Rose wrote:
>David Maus <dmaus@ictsoc.de> writes:
>>> sh$ man utf-8
>>
>> Thanks! I finally get a grip on one of my personal nightmares.
>It's not that bad, is it? :D
Even better: It makes sense ;)
>> The attached patch is the first step in this direction: It modifies
>> the algorithm of `org-link-escape', now iterating over the input
>> string with `mapconcat' and escaping all characters in the escape
>> table or are between 127 and 255.
>Between 128 (1000 0000) and 255 ??
>The binary representation of 127 is 0111 1111 and valid ascii char. DEL
>actually (sh$ man ascii)
Right, and that's why it is encoded: No control characters in a URI.
The final algorithm for the shiny new unicode aware percent encoding
function would be:
- percent encode all characters in TABLE
- percent encode all characters below 32 and above 126
- encode the char in utf-8
- percent escape all bytes of the encoded char
The remaining problem is keeping backward compatibility. There are Org
files out there where "á" is encoded as "%E1" and not "%C3A1". The
percent decoding function should be able to recognize these old
escapes and return the right value.
I looks like this could be done by changing the behavior of
`org-protocol-unhex-string'. Currently it returns the empty string
for "%E1" because it does not represent a valid utf-8 encoded unicode
char. Maybe we could say: If the percent encoded sequence does not
form a valid char, use the old method (extended ASCII?) to decode the
sequences.
Sadly (or luckily?) chances are good that I will be somewhat offline
for the next two weeks -- I think implementing this unicode aware
escaping function should be the way to go but requires some careful
checking for it's consequences for old Org files.
Best,
-- David
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Email..... dmaus@ictsoc.de
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next prev parent reply other threads:[~2010-09-26 18:22 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-20 12:42 [bug] org-link-escape and (wrong-type-argument stringp nil) Sébastien Vauban
2010-09-20 18:57 ` David Maus
2010-09-20 19:31 ` Sebastian Rose
2010-09-22 7:19 ` David Maus
2010-09-22 14:25 ` Sebastian Rose
2010-09-23 18:40 ` David Maus
2010-09-23 19:57 ` Sebastian Rose
2010-09-26 18:22 ` David Maus [this message]
2010-09-26 21:23 ` Sebastian Rose
2010-09-26 22:43 ` Sebastian Rose
2010-09-26 22:47 ` Sebastian Rose
2010-09-26 22:51 ` Sebastian Rose
2010-09-27 5:36 ` [PATCH] " David Maus
2010-09-27 12:43 ` Sebastian Rose
2010-09-29 15:48 ` Carsten Dominik
2010-09-27 5:36 ` [PATCH] Decode single byte sequence if decoding unicode failed David Maus
2010-11-04 20:35 ` [bug] org-link-escape and (wrong-type-argument stringp nil) David Maus
2010-09-20 19:49 ` Sébastien Vauban
2010-09-22 7:20 ` David Maus
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