[css-text-4] white-space shorthand values cannot be fully expressed using its longhands

[nt1m]

https://drafts.csswg.org/css-text-4/#white-space-property

See issues 3 & 4.

WebKit assumes that shorthands don't have other side effects than just setting their longhands. So every single of the shorthand values should be expressible in some form by their longhands.

[Loirooriol]

It's not ideal (see #8055), but there are the precedents like system fonts, which set longhands to an internal value that serializes to empty string. This could be a temporary solution if you want to implement the longhands.

[nt1m]

there are the precedents like system fonts, which set longhands to an internal value that serializes to empty string.

This means the spec cannot be implemented without implementing the full set of longhands at least, even though text-space-collapse & text-space-trim are not stable.

[fantasai]

@nt1m Is there some particular feature that you want from L4? Sorting this out is on the to-do list, but there hasn't been a lot of interest in the extended white space values...

[nt1m]

@fantasai I'm interested in implementing text-wrap and text-group-align more specifically.

[fantasai]

Fixed in #8274 @nt1m Please file follow-up issues if you notice anything wrong!