Re: [BRLTTY] Braille coding in Gnopernicus

[Bill Haneman <Bill Haneman Sun COM>]

remus draica wrote:...

> > The other problem is that currently, unless I am mistaken, gnopernicus' 
> > braille tables are 8 bit tables, and gnopernicus always assumes Latin-1.
> >
> >    
> That's right.
>
>  
>
> > Latin-2 is also 8-bit, so in theory the current gnopernicus architecture 
> > could handle this, but it would need to know when to convert from UTF-8 
> > to Latin-2 instead of UTF-8 to Latin-1.  I am not even totally sure that 
> > gnopernicus is converting from UTF-8 to Latin-8 now, before it does a 
> > braille table lookup, but it probably should be.
> >    
>
> Gnpernicus calls g_utf8_get_char () for every char to display. If the
> result is bigger than a value (256), the undefined code is dispalyed,
> otherwise the entry in a table.
>  
I think instead of checking to see if the utf-8 character is more than 
one byte, you could use g_convert_with_fallback to convert the character 
to either Latin-1 or Latin-2, etc.
based on the current braille table.   So if the user were using a 
braille table that required Latin-2, you would use g_convert to convert 
the UTF-8 characters to Latin-2 before doing the braille table lookup.

http://developer.gnome.org/doc/API/2.0/glib/glib-Character-Set-Conversion.html#g-convert-with-fallback


regards

Bill

>  
>
> > If gnopernicus had a Latin-2 table that worked for your locale, then I 
> > think we could solve the problem by including the "character set" in the 
> > braille table, at the top, and making sure gnopernicus did the correct 
> > UTF-8 to 8-bit conversion for the given table before doing a character 
> > lookup.  From there on, the correct dots should be sent to BrlAPI.  
> > Remus, please correct me if I have this wrong.
> >
> >    
> If the new "latin-2" table replaces the current table, it will be used
> by gnopernicus. Ther is no way to use both latin-1 and latin2 tables at
> the same time. 
>
>  
>
> > A better solution long-term would not be limited to an 8-bit braille 
> > table lookup, but this is the sort of thing 'gnome-braille' attempts to 
> > handle.
> >
> >    
>
>
> Regards,
> Remus
>
>
>