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compat.php
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compat.php
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<?php
/**
* Temporary compatibility shims for features present in Gutenberg, pending
* upstream commit to the WordPress core source repository. Functions here
* exist only as long as necessary for corresponding WordPress support, and
* each should be associated with a Trac ticket.
*
* @package gutenberg
*/
/**
* Filters allowed CSS attributes to include `flex-basis`, included in saved
* markup of the Column block.
*
* This can be removed when plugin support requires WordPress 5.3.0+.
*
* @see https://core.trac.wordpress.org/ticket/47281
* @see https://core.trac.wordpress.org/changeset/45363
*
* @since 5.7.0
*
* @param string[] $attr Array of allowed CSS attributes.
*
* @return string[] Filtered array of allowed CSS attributes.
*/
function gutenberg_safe_style_css_column_flex_basis( $attr ) {
$attr[] = 'flex-basis';
return $attr;
}
add_filter( 'safe_style_css', 'gutenberg_safe_style_css_column_flex_basis' );
/**
* Shim that hooks into `pre_render_block` so as to override `render_block`
* with a function that passes `render_callback` the block object as the
* argument.
*
* @see https://core.trac.wordpress.org/ticket/48104
*
* @param string $pre_render The pre-rendered content. Default null.
* @param array $block The block being rendered.
*
* @return string String of rendered HTML.
*/
function gutenberg_provide_render_callback_with_block_object( $pre_render, $block ) {
global $post;
if ( 'core/navigation' !== $block['blockName'] ) {
return $pre_render;
}
$source_block = $block;
/** This filter is documented in src/wp-includes/blocks.php */
$block = apply_filters( 'render_block_data', $block, $source_block );
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
$is_dynamic = $block['blockName'] && null !== $block_type && $block_type->is_dynamic();
$block_content = '';
$index = 0;
foreach ( $block['innerContent'] as $chunk ) {
$block_content .= is_string( $chunk ) ? $chunk : render_block( $block['innerBlocks'][ $index++ ] );
}
if ( ! is_array( $block['attrs'] ) ) {
$block['attrs'] = array();
}
if ( $is_dynamic ) {
$global_post = $post;
$prepared_attributes = $block_type->prepare_attributes_for_render( $block['attrs'] );
$block_content = (string) call_user_func( $block_type->render_callback, $prepared_attributes, $block_content, $block );
$post = $global_post;
}
/** This filter is documented in src/wp-includes/blocks.php */
return apply_filters( 'render_block', $block_content, $block );
}
add_filter( 'pre_render_block', 'gutenberg_provide_render_callback_with_block_object', 10, 2 );
/**
* Sets the current post for usage in template blocks.
*
* @return WP_Post|null The post if any, or null otherwise.
*/
function gutenberg_get_post_from_context() {
// TODO: Without this temporary fix, an infinite loop can occur where
// posts with post content blocks render themselves recursively.
if ( is_admin() || defined( 'REST_REQUEST' ) ) {
return null;
}
if ( ! in_the_loop() ) {
rewind_posts();
the_post();
}
return get_post();
}