[wp-trac] [WordPress Trac] #53175: Block Editor: Include the theme.json infrastructure code and support

[WordPress Trac]

#53175: Block Editor: Include the theme.json infrastructure code and support
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 Reporter:  youknowriad     |      Owner:  (none)
     Type:  task (blessed)  |     Status:  new
 Priority:  normal          |  Milestone:  5.8
Component:  Editor          |    Version:
 Severity:  normal          |   Keywords:
  Focuses:                  |
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 Now that Gutenberg has been updated with the final format for theme.json
 that is supposed to land in WordPress 5.8, we can start back porting the
 php changes and infrastructure code needed to support theme.json features
 in Core.

 Also, doing this will allow us to do three things that were postponed
 during the precent package update in Core due to the lack of theme.json
 support.

  - Fully backport the layout block support.
  - Add a conditional check about the "classic.css" dependency in the style
 loader (only load it for themes without theme.json file).
  - Add the supportsLayout editor setting.

 This ticket might potentially be blocked by the update to the Gutenberg
 10.6 packages.

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Ticket URL: <https://core.trac.wordpress.org/ticket/53175>
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