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Themes: Introduce wp_theme_has_theme_json() for public consumption.

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Adds `wp_theme_has_theme_json()` for public consumption, to replace the private internal Core-only `WP_Theme_JSON_Resolver::theme_has_support()` method. This new global function checks if a theme or its parent has a `theme.json` file.

For performance, results are cached as an integer `1` or `0` in the `'theme_json'` group with `'wp_theme_has_theme_json'` key. This is a non-persistent cache. Why? To make the derived data from `theme.json` is always fresh from the potential modifications done via hooks that can use dynamic data (modify the stylesheet depending on some option, settings depending on user permissions, etc.).

Also adds a new public function `wp_clean_theme_json_cache()` to clear the cache on `'switch_theme'` and `start_previewing_theme'`.

References:
* [https://github.com/WordPress/gutenberg/pull/45168 Gutenberg PR 45168] Add `wp_theme_has_theme_json` as a public API to know whether a theme has a `theme.json`.
* [https://github.com/WordPress/gutenberg/pull/45380 Gutenberg PR 45380] Deprecate `WP_Theme_JSON_Resolver:theme_has_support()`.
* [https://github.com/WordPress/gutenberg/pull/46150 Gutenberg PR 46150] Make `theme.json` object caches non-persistent.
* [https://github.com/WordPress/gutenberg/pull/45979 Gutenberg PR 45979] Don't check if constants set by `wp_initial_constants()` are defined.
* [https://github.com/WordPress/gutenberg/pull/45950 Gutenberg PR 45950] Cleaner logic in `wp_theme_has_theme_json`.

Follow-up to [54493], [53282], [52744], [52049], [50959].

Props oandregal, afragen, alexstine, aristath, azaozz, costdev, flixos90, hellofromTonya, mamaduka, mcsf, ocean90, spacedmonkey.
Fixes #56975.
Built from https://develop.svn.wordpress.org/trunk@55086


git-svn-id: http://core.svn.wordpress.org/trunk@54619 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
hellofromTonya
2023-01-18 11:40:10 +00:00
parent 645d6359b3
commit 8ddb28368a
14 changed files with 95 additions and 39 deletions
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2
wp-admin/edit-form-blocks.php
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@@ -203,7 +203,7 @@ $editor_settings = array(
'unlockNonce' => wp_create_nonce( 'update-post_' . $post->ID ),
'ajaxUrl' => admin_url( 'admin-ajax.php' ),
),
'supportsLayout' => WP_Theme_JSON_Resolver::theme_has_support(),
'supportsLayout' => wp_theme_has_theme_json(),
'supportsTemplateMode' => current_theme_supports( 'block-templates' ),
// Whether or not to load the 'postcustom' meta box is stored as a user meta