Re: CSS layout and line breaking

David Carlisle writes:

> On 04/03/2013 06:37, Karl Tomlinson wrote:
>>> <mpadded width="height">...</mpadded>
>>>>
>>>> can make width depends on height is a problem with our curent
>>>> approach but that could probably be removed from the MathML spec
>>>> (I don't think computing horizontal metrics from vertical metrics
>>>> is used in practice).
>> Yes, this adds considerable complexity to the algorithm.
>>
>
> In some layout systems (TeX for example) this is no complexity at all
> and is exactly the same as accessing the width, similarly in the spec it
> just fell out naturally by giving all "length" based attributes the same
> syntax.
>
> That said, it is I would guess, never used in real documents other
> than test files.

If it is used somewhere, I guess Ojan's algorithm could work if we
just did no automatic line breaking of descendants of mpadded.

I haven't studied the layout algorithm of TeX.  When I used TeX, I
think I only noticed automatic line-breaking for text paragraphs,
and used manual line breaks for equations.