From mint-bounce@lists.fishpool.fi  Wed Dec  9 21:43:40 2009
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Date: Wed, 09 Dec 2009 21:38:44 -0500
From: Mark Duckworth <mduckworth@atari-source.org>
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To: Jo Even Skarstein <joska@online.no>
CC: "mint@lists.fishpool.fi" <mint@lists.fishpool.fi>
Subject: Re: [MiNT] Greek keyboard table
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Jo Even Skarstein wrote:
> Helmut Karlowski skreiv:
>
>>> it will be nice to have the dead key function.
>>
>> Which one shall this be? I thought of ALT+', ALT+^, etc, but that 
>> would also not be very convenient.
>
> Deadkeys should not be linked to a specific key or key combo, but to 
> an ASCII value. It can be done something like this in the end of 
> scan2asc() (or whatever it's called - the function in keyboard.c that 
> converts scancodes to ASCII) (pseudocode):
>
> /* ascii is the resulting ascii code after looking it up in the 
> keyboard table. */
>
> if last_deadkey
> {
>   if ascii in deadkey_base_characters(last_deadkey) /* E.g. o */
>     ascii = deadkey_accented_characters(last_deadkey, ascii) /* E.g ô */
>   else
>     ascii = last_deadkey
>
>   last_deadkey = '\0'
> }
> else if ascii in deadkeys /* E.g ^ */
> {
>   last_deadkey = ascii
>   ascii = '\0'
> }
>
> return ascii
>
> So if you set the character '^' to be a deadkey, then any key or 
> key-combo that returns ^ from the ordinary keyboard table will be a 
> deadkey. If a valid "base character" for this deadkey is pressed next, 
> it's corresponding accented character will be returned. E.g. ^ + o = 
> ô. If deadkey is followed by an invalid base character, the deadkey is 
> returned.
>
> The deadkey-tables can follow the current tables, and the format can 
> be simple:
>
> deadkey character, basecharacter, accented character, base character, 
> accented character, '\0'
>
> I don't think it has to be more complicated than this.
>
> Jo Even
>
>
I had an atari tool that did this.  CKBD?

Thanks,
Mark