[wp-trac] [WordPress Trac] #50706: Block Editor: Apply allowed_block_types filter to registered blocks

[WordPress Trac]

#50706: Block Editor: Apply allowed_block_types filter to registered blocks
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 Reporter:  Bernhard Reiter  |      Owner:  (none)
     Type:  defect (bug)     |     Status:  new
 Priority:  normal           |  Milestone:  Awaiting Review
Component:  General          |    Version:
 Severity:  normal           |   Keywords:
  Focuses:                   |
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 The [https://developer.wordpress.org/reference/hooks/allowed_block_types/
 `allowed_block_types` hook] filters a list of blocks. Alternatively, it's
 possible to pass a bool to indicate that either all blocks are allowed
 (`true`), or none of them are (`false`).

 It's currently [https://github.com/WordPress/wordpress-
 develop/blob/83e78d8cdd0282883d1b61d0b4d2820a9cadcebf/src/wp-admin/edit-
 form-blocks.php#L150 applied] in `lib/edit-form-blocks.php` to a default
 value of `true` -- meaning all blocks are allowed.

 However, this means that the filter can only really be used for an
 allowlist, but not for a denylist: Since we don't really have access to
 the full list of available blocks from the filter (but just that `true`
 bool), we cannot choose to remove a set of blocks from  that list.

 I'm thus suggesting to pass the full list of registered blocks to the
 filter as the default value instead.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/50706>
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