Re: bug in \definefontfamily?

[Hans Hagen <pragma@wxs.nl>]

On 3/19/2017 10:08 PM, Pablo Rodriguez wrote:
> On 03/19/2017 09:58 PM, Wolfgang Schuster wrote:
>>> Pablo Rodriguez 19. März 2017 schrieb:
>>> But [features={none, quality}] disables everything and I canot enable
>>> protrusion plus expansion only.
>>>
>>> At least, it doesn’t work with \definefontfamily. I haven’t tested this
>>> with \setupfontfamily.
>>
>> \definefontfamily[mainface][mono][Latin Modern Mono Prop][features=quality]
>
> Yes, this might work, but I’m afraid I need to disable other default
> features such as ligatures (not only liga, but TeX ligatures).
>
> I had this problem typesetting XML sources and I didn’t know how to
> disable the other features.
>
> My main interest in having mono with quality are standard paragraphs
> with Roman text. Expansion and protrusion enable better line breaking.

not true

expansion can make excessive spacing less excessive
protrusion is an esthetic feature

esp protrusion also adds constraints (i.e. one cannot selectively 
protrude a hyphen in one line and not in the next one for instance) so 
the solutionspace doesn't become much better

(fwiw, personally i never use expansion but occasionally i use protrusion)

> And if mono doesn’t get protrusion, you may find wrong optical margins
> (protrusion), because the lack of it only on the mono face.
>
> Many thanks for your help,
>
> Pablo
>


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