Table Block: Fix margin to include caption in spacing

[Infinite-Null]

Fixes: #68217

What?

The PR modifies the margin application in table blocks to ensure theme.json margin settings are applied to the figure wrapper instead of the inner table element.

Why?

When margins are set via theme.json, they are applied to the inner table element, causing undesirable spacing between the table and its caption. This PR fixes these spacing inconsistencies by applying margins to the correct element.

Testing Instructions

1. Create a new post
2. Insert a table block
3. Add a caption to the table
4. In theme.json, set a margin for the core/table block (e.g., 128px)
5. Check the caption and table block

Screenshots or screencast

Before	After

[github-actions]

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Co-authored-by: Infinite-Null <[email protected]>
Co-authored-by: t-hamano <[email protected]>
Co-authored-by: yogeshbhutkar <[email protected]>
Co-authored-by: andersnoren <[email protected]>

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[yogeshbhutkar]

Hi @Infinite-Null, thanks for the PR ✨

I've tested out the PR and it seems to work as expected. The bug has been resolved.

[t-hamano]

Thanks for the PR!

One thing to be aware of is that the __experimentalSelector field affects all global styles. Other styles, except padding/margin, etc. are expected to apply to the table element, but in this PR they are applied to the figure element, which is not the intention.

Below is a screenshot of the border, color, and font styles applied to the Table block via the global styles:

trunk

This PR

Therefore, we cannot modify the __experimentalSelector field directly.

Instead, there is now a new Block Selectors API. Can we use this to target spacing support to figure elements and other elements to table elements as before?

[Infinite-Null]

Hi @t-hamano,

Thank you for the suggestion. I’ve reverted the __experimentalSelector and applied the following to address the issue:

"selectors": {
    "spacing": {
	"margin": ".wp-block-table"
   }
},

Please review it at your convenience.
Thank You!