Spacing presets: add utility classes to block to indicate current spacing preset settings

[glendaviesnz]

What problem does this address?

Currently, the spacing presets are added to blocks via inline styles only. It would be useful to have utility classnames as well/instead in the same way that font-sizes do in order to allow further styling by themes based on presets applied.

What is your proposed solution?

Use the existing style engine infrastructure to apply utility classnames to the block wrappers where spacing presets have been applied.

Because of the large number of variations for spacing presets, eg. has-bottom-padding-10 times 7+ preset slugs, x four sides = a minimum of 28 new utility classes with associated CSS vars being output, so it would be good if only the classes needed for the current page were output.

[cbirdsong]

Has there been any work on this? The lack of these makes using add_theme_support( 'disable-layout-styles' ); a real tradeoff.

[glendaviesnz]

@cbirdsong as far as I am aware there hasn't. As soon as some of the 6.2 release priority work is covered off I will see if we can take a look at what will be involved in implementing this.