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bug#4157: Re: bug#4157: 23.1.50; faulty character characterisation for ä


From: Kenichi Handa
Subject: bug#4157: Re: bug#4157: 23.1.50; faulty character characterisation for ä
Date: Tue, 25 Aug 2009 09:46:50 +0900

In article <address@hidden>, Peter Dyballa <address@hidden> writes:

> The version from three weeks ago does not allow to  
> separate the composed character's components, i.e., the text cursor  
> cannot select this or that component, one step and it has reached the  
> previous or next character.

Even if your buffer has the char sequence "a" and "¨", "¨"
is displayed on top of "a" and cursor movement treats those
two characters atomically as if there's a single character
"ä".

> A difference I can see comes C-u C-x =: the line

>    canonical-combining-class: 0 (Spacing, split, enclosing,  
> reordrant, and Tibetan subjoined)

> is removed from the output.

That's the point.  utf-8-hfs converts the sequence "a" and
"¨" to a single character "ä" on decoding, and breaks down
"ä" to "a" and "¨" on encoding.

> The composed character still is not taken from the default font.  
> Could be one component is missing, ¨ – but it has the precomposed  
> characters I usually use.

Which font is selected for the character "ä"?  It seems to
be a bug if the font is not your default font.

---
Kenichi Handa
address@hidden





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