[wp-trac] [WordPress Trac] #49615: Editor: Support filtering arguments in block type registration

[WordPress Trac]

#49615: Editor: Support filtering arguments in block type registration
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 Reporter:  aduth        |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  Awaiting Review
Component:  Editor       |    Version:
 Severity:  normal       |   Keywords:
  Focuses:               |
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 Related: https://github.com/WordPress/gutenberg/pull/18414

 It is currently not possible to filter the settings of a block type during
 its registration. I would propose that this support be added for on the
 following basis.

 - To enable extensibility. See
 [https://github.com/WordPress/gutenberg/pull/18414 Gutenberg#18414] for
 one such example, where default block attributes are added automatically
 on the basis of [https://developer.wordpress.org/block-editor/developers
 /block-api/block-registration/#supports-optional block "supports"].
 - For consistency with other `register_` functions.

 See prior art:

 - https://developer.wordpress.org/reference/hooks/register_post_type_args/
 - https://developer.wordpress.org/reference/hooks/register_taxonomy_args/
 - https://developer.wordpress.org/reference/hooks/register_meta_args/

 The attached patch seeks to follow this pattern:

 - Named `register_block_type_args` for consistency with prior art
 - Implemented in `WP_Block_Type::set_props`, after `wp_parse_args`, for
 consistency with [https://github.com/WordPress/wordpress-
 develop/blob/150a49a0b1e1d4e88f6d5d6a94c3c97baac93aac/src/wp-includes
 /class-wp-post-type.php#L378-L386 `WP_Post_Type::set_props`]

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Ticket URL: <https://core.trac.wordpress.org/ticket/49615>
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