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Editor: Add should_load_block_editor_scripts_and_styles

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Adds a new should_load_block_editor_scripts_and_styles filter which can be used
by plugins including Gutenberg to more precisely customise when block editor
scripts and styles should be loaded by script-loader.php. Previously, plugins
had to fiddle with $current_screen->is_block_editor(). 

Props zieladam.
See #51330.


git-svn-id: https://develop.svn.wordpress.org/trunk@49080 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Robert Anderson 2020-10-01 00:37:54 +00:00
parent 550bcd4f31
commit 443ed5bf18
1 changed files with 28 additions and 6 deletions
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34
src/wp-includes/script-loader.php
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@ -2160,9 +2160,7 @@ function script_concat_settings() {
* @global WP_Screen $current_screen WordPress current screen object.
*/
function wp_common_block_scripts_and_styles() {
global $current_screen;
if ( is_admin() && ( $current_screen instanceof WP_Screen ) && ! $current_screen->is_block_editor() ) {
if ( is_admin() && ! _should_load_block_editor_scripts_and_styles() ) {
return;
}
@ -2185,6 +2183,30 @@ function wp_common_block_scripts_and_styles() {
do_action( 'enqueue_block_assets' );
}
/**
* Checks if the editor scripts and styles for all registered block types
* should be enqueued on the current screen.
*
* @access private
*
* @return boolean
*/
function _should_load_block_editor_scripts_and_styles() {
global $current_screen;
$is_block_editor_screen = ( $current_screen instanceof WP_Screen ) && $current_screen->is_block_editor();
/**
* Filters the flag that decides whether or not block editor scripts and
* styles are going to be enqueued on the current screen.
*
* @since 5.6.0
*
* @param boolean $is_block_editor_screen Current value of the flag
*/
return apply_filters( 'should_load_block_editor_scripts_and_styles', $is_block_editor_screen );
}
/**
* Enqueues registered block scripts and styles, depending on current rendered
* context (only enqueuing editor scripts while in context of the editor).
@ -2196,7 +2218,7 @@ function wp_common_block_scripts_and_styles() {
function wp_enqueue_registered_block_scripts_and_styles() {
global $current_screen;
$is_editor = ( ( $current_screen instanceof WP_Screen ) && $current_screen->is_block_editor() );
$load_editor_scripts = _should_load_block_editor_scripts_and_styles();
$block_registry = WP_Block_Type_Registry::get_instance();
foreach ( $block_registry->get_all_registered() as $block_name => $block_type ) {
@ -2211,12 +2233,12 @@ function wp_enqueue_registered_block_scripts_and_styles() {
}
// Editor styles.
if ( $is_editor && ! empty( $block_type->editor_style ) ) {
if ( $load_editor_scripts && ! empty( $block_type->editor_style ) ) {
wp_enqueue_style( $block_type->editor_style );
}
// Editor script.
if ( $is_editor && ! empty( $block_type->editor_script ) ) {
if ( $load_editor_scripts && ! empty( $block_type->editor_script ) ) {
wp_enqueue_script( $block_type->editor_script );
}
}