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Widgets: Preserve classic sidebars when switching to a block theme.

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When switching to a block theme, classic sidebars were orphaned and their widgets remapping to the `'wp_inactive_widgets'` sidebar . This changeset preserves the sidebars and their widgets, providing a migration path to a block theme without losing the widgets.

Classic sidebars are now:

* Stored in a new theme mod called `'wp_classic_sidebars'`;
* Restored to the `$wp_registered_sidebars` global variable when the `'widgets_init'` action fires (via a new internal function called `_wp_block_theme_register_classic_sidebars()`);
* And marked as `'inactive'` when interacting with sidebars REST API endpoint.

References:
* [https://github.com/WordPress/gutenberg/pull/45509 Gutenberg PR 45509] which adds an option for importing widgets from sidebars into template parts.

Follow-up to [50995], [6334].

Props mamaduka, audrasjb, hellofromTonya, ironprogrammer, jameskoster, joen, matveb, mukesh27, noisysocks, poena, youknowriad.
Fixes #57531.

git-svn-id: https://develop.svn.wordpress.org/trunk@55200 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Tonya Mork
2023-02-03 00:13:52 +00:00
parent a501f4f40d
commit 8ff5899348
6 changed files with 194 additions and 1 deletions
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8
src/wp-includes/theme.php
View File

@@ -733,11 +733,12 @@ function locale_stylesheet() {
* @global array $wp_theme_directories
* @global WP_Customize_Manager $wp_customize
* @global array $sidebars_widgets
* @global array $wp_registered_sidebars
*
* @param string $stylesheet Stylesheet name.
*/
function switch_theme( $stylesheet ) {
global $wp_theme_directories, $wp_customize, $sidebars_widgets;
global $wp_theme_directories, $wp_customize, $sidebars_widgets, $wp_registered_sidebars;
$requirements = validate_theme_requirements( $stylesheet );
if ( is_wp_error( $requirements ) ) {
@@ -814,6 +815,11 @@ function switch_theme( $stylesheet ) {
}
}
// Stores classic sidebars for later use by block themes.
if ( $new_theme->is_block_theme() ) {
set_theme_mod( 'wp_classic_sidebars', $wp_registered_sidebars );
}
update_option( 'theme_switched', $old_theme->get_stylesheet() );
/**