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Widgets: Always try restoring widget assignments

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For code-historic reasons, restoring widget assignments would not be attempted if there were no sidebars to map.
Restoring previous assignments is something unrelated to sidebar mappings however, so now it will be attempted on every theme switch.

Fixes #42719.

Merges [42374] to the 4.9 branch.

Built from https://develop.svn.wordpress.org/branches/4.9@42375


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42204 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Konstantin Obenland 2017-12-07 02:23:45 +00:00
parent 030f429e78
commit 0a429ab309
1 changed files with 58 additions and 58 deletions
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10
wp-includes/widgets.php
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@ -1180,6 +1180,7 @@ function retrieve_widgets( $theme_changed = false ) {
* Compares a list of sidebars with their widgets against a whitelist.
*
* @since 4.9.0
* @since 4.9.2 Always tries to restore widget assignments from previous data, not just if sidebars needed mapping.
*
* @param array $existing_sidebars_widgets List of sidebars and their widget instance IDs.
* @return array Mapped sidebars widgets.
@ -1222,10 +1223,8 @@ function wp_map_sidebars_widgets( $existing_sidebars_widgets ) {
}
}
// If there are no old sidebars left, then we're done.
if ( empty( $existing_sidebars_widgets ) ) {
return $new_sidebars_widgets;
}
// If there are more sidebars, try to map them.
if ( ! empty( $existing_sidebars_widgets ) ) {
/*
* If old and new theme both have sidebars that contain phrases
@ -1280,6 +1279,7 @@ function wp_map_sidebars_widgets( $existing_sidebars_widgets ) {
} // endforeach foreach ( $wp_registered_sidebars as $new_sidebar => $args )
} // endforeach ( $slug_group as $slug )
} // endforeach ( $common_slug_groups as $slug_group )
}
// Move any left over widgets to inactive sidebar.
foreach ( $existing_sidebars_widgets as $widgets ) {
@ -1290,7 +1290,7 @@ function wp_map_sidebars_widgets( $existing_sidebars_widgets ) {
// Sidebars_widgets settings from when this theme was previously active.
$old_sidebars_widgets = get_theme_mod( 'sidebars_widgets' );
$old_sidebars_widgets = $old_sidebars_widgets['data'];
$old_sidebars_widgets = isset( $old_sidebars_widgets['data'] ) ? $old_sidebars_widgets['data'] : false;
if ( is_array( $old_sidebars_widgets ) ) {