Re: How do you deal with inappropriate ligatures?

[Hans Hagen <j.hagen@xs4all.nl>]

On 10/12/2020 11:09 PM, Denis Maier wrote:
> Am 12.10.2020 um 22:35 schrieb Hans Hagen:
>> On 10/12/2020 4:55 PM, Denis Maier wrote:
>>> Hi,
>>>
>>> with LuaLaTeX I used to use the selnolig package to disable 
>>> inappropriate ligatures. With ConTeXt I have just inputted the list 
>>> prepared by Hraban (based on a wordlist originating from selnolig), 
>>> but then ran into a curious bug (?) with disappearing characters (see 
>>> my posts from a couple of days ago). I'm now converting this list to 
>>> the \blockligatures mechanism (instead of using \replaceword), which 
>>> also has better kerning support due to Hans. When done, I'll of 
>>> course share this on the Wiki if there's any need for this.
>>>
>>> Now I'm wondering how others deal with inappropriate ligatures. Do 
>>> you just ignore them? Do there just so many.
>>>
>>> What do you think?
>> I played a bit with what we have and in a next upload you can do this:
>>
>> \startexceptions[de]
>> au{f-}{f}{ff}(f\zwnj f)asseyou block them on an ad-hoc basis, like 

>>> whenever they occur? Do you use scripts to pre-process your files 

>>> before typesetting? Do you just disable ligatures globally?

>>>

>>> I tend to think there must be an automatic way to deal with the most 

>>> awkward cases. The problem is that 
>> \stopexceptions
>>
>> \showglyphs
>>
>> \starttext
>>
>> auffasse
>>
>> then is like:
>>
>> au\discretionary{f-}{-f}{f\zwnj f}asse
>>
>> \stoptext
> Oh, that looks interesting. So that would essentially be implemented 
> like hyphenation exceptions? Any drawbacks? Performance hit with large 
> exception lists? Kerning?
in a next release a

\zwj   block ligature, permit kern
\zwnj  block ligature, also inhibit kern

for now, lmtx only

Hans

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