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@t-hamano t-hamano commented Apr 8, 2025

What?

Core ticket: https://core.trac.wordpress.org/ticket/63253

See: #68036 (comment)

Why?

Currently, we are exposing Stylebook for the classic theme by checking the value of supportsLayout as one of the conditions. However, there is no guarantee that this setting will remain equivalent to wp_theme_has_theme_json() in the future.

We should expose the new has_theme_json field via the theme REST API.

How?

Add a new has_theme_json field to the WP_REST_Themes_Controller class.

Testing Instructions

  • Run wp.data.select('core').getCurrentTheme() in the browser console.
  • Confirm that the response includes the has_theme_json field.

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github-actions bot commented Apr 8, 2025

Size Change: -17 B (0%)

Total Size: 1.84 MB

Filename Size Change
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ℹ️ View Unchanged
Filename Size
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@t-hamano t-hamano self-assigned this Apr 8, 2025
@t-hamano t-hamano added REST API Interaction Related to REST API [Type] New API New API to be used by plugin developers or package users. [Feature] Style Book labels Apr 8, 2025
@t-hamano t-hamano marked this pull request as ready for review April 8, 2025 14:02
@t-hamano t-hamano requested a review from spacedmonkey as a code owner April 8, 2025 14:02
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github-actions bot commented Apr 8, 2025

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Co-authored-by: carolinan <[email protected]>

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@t-hamano t-hamano closed this Apr 8, 2025
@t-hamano t-hamano reopened this Apr 8, 2025
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Mamaduka commented Apr 8, 2025

The current code will register the field for every theme item, not just the active one. What's the reason for the active theme limitation?

The is_block_theme property doesn't have a similar condition - https://github.com/WordPress/wordpress-develop/blob/6511cc02f764a3d9c0dd105e5366fdfe63a564cc/src/wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php#L331-L333.

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t-hamano commented Apr 9, 2025

I'm not familiar with REST API, but do you mean that we should expose both has_theme_json and is_block_theme only in the active theme?

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I guess we should expose this in a similar manner to is_block_theme. I mostly asked because the gutenberg_register_rest_theme_has_theme_json_fields functions docblock suggests that the field will be available only for active themes, which currently is incorrect.

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I believe this is also needed for #69873

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Maybe I don't fully understand the problem with this PR.

  • The is_block_theme field can be referenced via the WP_REST_Themes_Controller. This endpoint can reference all themes, not just the active theme. Is this correct?
  • Maybe the approach using register_rest_field is not the right one?

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The problem here is that wp_theme_has_theme_json returns results relative to the active theme. So, if you fetch the theme collection when the active theme has a theme.json file, the has_theme_json property will be true for every theme, and it will be the opposite when the active theme has no theme.json file.

We either have to limit has_theme_json to the active theme or find a different method for fetching its value.

Fetch collection:

wp.data.select( 'core' ).getEntityRecords( 'root', 'theme', { per_page: -1, _fields: [ 'stylesheet', 'has_theme_json', 'is_block_theme' ] } );

Screenshots

TT5 is active
CleanShot 2025-04-14 at 17 53 46

2015 theme is active
CleanShot 2025-04-14 at 17 54 32

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The problem here is that wp_theme_has_theme_json returns results relative to the active theme.

Thank you, I was able to understand what the problem was in this PR! I'd like to explore another approach.

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After thinking about this problem, I decided that the WP_Theme class needed a new has_theme_json() method so that the has_theme_json property would have the correct value no matter what the active theme is.

See https://core.trac.wordpress.org/ticket/63299

@t-hamano t-hamano requested a review from Copilot April 17, 2025 11:14
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Pull Request Overview

This PR updates the theme API integration in the site editor by replacing the temporary use of the settings.supportsLayout field with the new currentTheme.has_theme_json field. Key changes include replacing the legacy field in the SiteHub component, updating utility functions in the theme route, and cleaning up unused editorSettings in the App component.

Reviewed Changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated 1 comment.

File Description
packages/edit-site/src/components/site-hub/index.js Updated to use currentTheme.has_theme_json instead of settings.supportsLayout
packages/edit-site/src/components/site-editor-routes/utils.js Replaced the temporary editorSettings field with currentTheme.has_theme_json
packages/edit-site/src/components/app/index.js Removed the unused editorSettings field and updated derived data
backport-changelog/6.9/8665.md Added changelog entries referencing related PRs and tickets
Files not reviewed (2)
  • lib/compat/wordpress-6.9/rest-api.php: Language not supported
  • lib/load.php: Language not supported

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Flaky tests detected in f72b668.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/14335728615
📝 Reported issues:

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[Feature] Style Book REST API Interaction Related to REST API [Type] New API New API to be used by plugin developers or package users.

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4 participants