Comments Content: Add missing typography support

[aaronrobertshaw]

Related:

• Tracking: Addressing Design Tooling Consistency #43241
• Tracking: Typography Design Tools Consistency #43242

What?

Adds missing text-decoration support to the Comments Content block.

Why?

While there might not be a lot of value in text-decoration styles for the comments content block, adding this helps us ensure consistent design tools across blocks.

How?

• Opts into text decoration support.

Testing Instructions

1. Load the block editor with a post containing comments
2. Add a comments block to the post and select the comment's content
3. Confirm the text decoration control is now available within the Typography panel's ellipsis menu
4. Experiment with typography settings
5. Save and confirm the styles appear on the frontend
6. Test the new support works for the block via theme.json and global styles.

Screenshots or screencast

Screen.Recording.2022-08-16.at.7.51.25.pm.mp4

[andrewserong]

This works nicely for me, and while there might not be many use cases for text decoration in this block, I think it's a good addition for consistency 👍

✅ Works well in the post editor at the individual block level, styles are applied and inherited in the content of the comment, across multiple kinds of HTML elements that can be included in comment content
✅ Works well in theme.json when adding a block level textDecoration value

I noticed that we don't have a text decoration control in the block level Typography panel in global styles. Given that this typography control is one that is less likely to be used, and the purpose is to create consistency in the Typography controls themselves, I don't think this is at all a blocker for landing this PR.

Thanks for putting all these PRs up!

[aaronrobertshaw]

Thanks for the review @andrewserong 👍

I noticed that we don't have a text decoration control in the block level Typography panel in global styles.

As you hinted at. There was a decision when the text decoration and text transform supports were added that they shouldn't be available at the Global Styles level. I don't think that reasoning has really changed in light of our consistency efforts as you can argue the controls are still the same in Global Styles across blocks.