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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: |
Thu, 23 Sep 2010 20:40:33 +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) |
Sebastian Rose wrote:
>David Maus <address@hidden> writes:
>> Sebastian Rose wrote:
>>>Is there a reason for this distinction between multibyte and unibyte?
>>>I favour the "shotgun-approach" if not. It's bullet-proof.
>>
>>>The JavaScript function `encodeURIComponent()' encodes the German Umlaut
>>>`ü' as `%C3%B6' regardless of the sources encoding actually. That's why
>>>I wrote the two functions `org-protocol-unhex-string' and
>>>`org-protocol-unhex-compound' (s. org-protocol.el).
>>
>> Ah, yes. From my understandig of the RFC %C3%BC is a valid
>> representation of the "ü" character.
>>
>> I do not yet fully understand
>> how to unescape such a representation. E.g. Is %C3%BC a hexencoded
>> multibyte char or a succession of two singlebyte chars?
>It's a hexencoded multibyte char.
>JavaScript implementations seem to turn non-ascii singlebyte chars
>into multibyte chars first, then encode the result.
>This means if a page is iso-8859-1 encoded (singlebyte `ü'),
>JavaScript will recode the `ü'. It's funny, but that's what I found
>when writing org-protocol.el
>`org-protocol-unhex-string' and `org-protocol-unhex-compound' decode
>such a representation.
>The trick is in the utf-8 encoding itself. If a byte starts with a 1,
>another byte will follow. The number of leading `1's denotes the amount
>of bytes used for one character. On a GNU/Linux system try
> sh$ man utf-8
Thanks! I finally get a grip on one of my personal nightmares. 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.
I'll try to figure out the escaping/unescaping of multibyte characters
next.
Sent as a patch because of it's possible side-effects: The new
algorithm ignores the cdr of the escape table cons -- Thus things will
break if they use this function for anything else then percent
escaping.
Best,
-- David
--
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0001-New-algorithm-for-percent-escaping.patch
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- [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Sébastien Vauban, 2010/09/20
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), David Maus, 2010/09/20
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Sebastian Rose, 2010/09/20
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), David Maus, 2010/09/22
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Sebastian Rose, 2010/09/22
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil),
David Maus <=
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Sebastian Rose, 2010/09/23
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), David Maus, 2010/09/26
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Sebastian Rose, 2010/09/26
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Sebastian Rose, 2010/09/26
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Sebastian Rose, 2010/09/26
- Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Sebastian Rose, 2010/09/26
- [PATCH] Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), David Maus, 2010/09/27
- Re: [PATCH] Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Sebastian Rose, 2010/09/27
- Re: [PATCH] Re: [Orgmode] [bug] org-link-escape and (wrong-type-argument stringp nil), Carsten Dominik, 2010/09/29
- [Orgmode] [PATCH] Decode single byte sequence if decoding unicode failed., David Maus, 2010/09/27