Re: Request for better script size and line height handling

Il 11/10/22 08:51, Frédéric WANG ha scritto:
> On 10/10/2022 23:30, Lorenzo Bertini wrote:
>> Hello,
>>
>> please forgive me if this is the wrong place to ask.
>>
>> I've been authoring with MathML for a while, and one thing that always 
>> bothered me is that <math> components break line height on all my 
>> paragraphs that have them.
>>
>> For example, a symbol with many subscripts, as in
>>
>> <math>
>> <mrow>
>>  <msub>
>>   <mi>ψ</mi>
>>   <msub>
>>    <mi>f</mi>
>>    <mi>f</mi>
>>   </msub>
>>  </msub>
>> </mrow>
>> </math>
>>
>> will cause lines following the one containing it to be distanced in 
>> the Firefox renderer.
>>
>> This happens all the time and makes the document look a bit rough and 
>> unpolished. I would like it to mimic Latex's behavior, that is, simply 
>> overflow in the next line. No way I tried (reducing line-height, 
>> height, etc) has overcome this effect.
>>
>> Now, I don't know if this is MathML's or Firefox's fault, or if this 
>> was intended all along; hence my worry for asking in the wrong place. 
>> Let me know in case.
>>
>> A solution that works is to wrap the <math> element inside a <div> 
>> element with for example "height: 1px" CSS property. Is there a way 
>> this could be implemented "natively"?
>>
>> One a side note, why was "scriptminsize" deprecated? Is there a 
>> substitute?
>>
>> Thank you lots for your time,
>>
>> Lorenzo
>>
>>
> Hello,
> 
> Is this a duplicate of 
> https://bugzilla.mozilla.org/show_bug.cgi?id=947650 ?
> 
> Have you followed instructions at 
> https://developer.mozilla.org/en-US/docs/Web/MathML/Fonts ?
> 

Yes, MathML fonts are all correctly installed and i can switch between 
them; they all render as they should. They also all show this kind of 
behavior though, so I don't think I have the same problem as that bug.

My problem is that the engine calculates new line vertical position 
based on the lowest element of the previous line: the infamous 
\psi_{f_{f}} pushes that new line very far. I'll attach a picture worth 
a thousand words.

Is there a way to tell the renderer not to reserve space for <math> 
elements? It will do it if I wrap <math> in a <div< and then ask for that.

Best regards