Enhancement: Added individual column and row gap controls.

[patil-vipul]

What?

Fixes #61298

Why?

Limitations in the current Post Template block, inability to independently adjust column gaps without affecting row gaps, thus proposing an enhancement for more precise customization.

How?

Implemented 'sides' property in block.json to enable independent adjustment of column gaps within 'blockGap' spacing support for Post Template block.

Testing Instructions

1. Next create a new post and add the Query Loop block.
2. Select Start Blank pattern, then choose Title & Date template.
3. Select the Post Template block from Document Overview to toggle the block controls.
4. Choose the Grid View from the block controls.
5. Goto styles tab in the block controls sidebar.
6. You'll see separate controls for Row and Column gap.

Testing Instructions for Keyboard

N/A

Screenshots or screencast

[github-actions]

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Co-authored-by: patil-vipul <vipulpatil@git.wordpress.org>
Co-authored-by: creativecoder <grantmkin@git.wordpress.org>
Co-authored-by: andrewserong <andrewserong@git.wordpress.org>

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[github-actions]

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[creativecoder]

Thanks for this PR!

Testing this with the Post Template block, I see that the Block Spacing controls now have both horizontal and vertical gap controls. However the behavior depends upon which view the block is set to use

• Grid view: horizontal and vertical block spacing can be set independently ✅
• List view: block spacing controls behave unexpectedly ❌

Screen.Recording.2024-05-31.at.13.05.58.mov

It seems that we need to dynamically change which block gap controls are available based on layout.

cc @andrewserong (who updated blockGap documentation not too long ago), in case I'm missing an easy solution here.

[andrewserong]

Thanks for working on this @patil-vipul and for the ping @creativecoder.

List view: block spacing controls behave unexpectedly ❌

Yes, this issue appears to be similar to the request for separate vertical and horizontal spacing in the Group (Row) block over in: #60643

Until there's a layout-aware way for us to control which sides are visible (and the output of the gap rules), I don't believe we can enable this feature, unfortunately.