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| /** | |
| * Background block support flag. | |
| * | |
| * @package WordPress | |
| * @since 6.4.0 | |
| */ | |
| /** | |
| * Registers the style block attribute for block types that support it. | |
| * | |
| * @since 6.4.0 | |
| * @access private | |
| * | |
| * @param WP_Block_Type $block_type Block Type. | |
| */ | |
| function wp_register_background_support( $block_type ) { | |
| // Setup attributes and styles within that if needed. | |
| if ( ! $block_type->attributes ) { | |
| $block_type->attributes = array(); | |
| } | |
| // Check for existing style attribute definition e.g. from block.json. | |
| if ( array_key_exists( 'style', $block_type->attributes ) ) { | |
| return; | |
| } | |
| $has_background_support = block_has_support( $block_type, array( 'background' ), false ); | |
| if ( $has_background_support ) { | |
| $block_type->attributes['style'] = array( | |
| 'type' => 'object', | |
| ); | |
| } | |
| } | |
| /** | |
| * Renders the background styles to the block wrapper. | |
| * This block support uses the `render_block` hook to ensure that | |
| * it is also applied to non-server-rendered blocks. | |
| * | |
| * @since 6.4.0 | |
| * @since 6.5.0 Added support for `backgroundPosition` and `backgroundRepeat` output. | |
| * @since 6.6.0 Removed requirement for `backgroundImage.source`. A file/url is the default. | |
| * | |
| * @access private | |
| * | |
| * @param string $block_content Rendered block content. | |
| * @param array $block Block object. | |
| * @return string Filtered block content. | |
| */ | |
| function wp_render_background_support( $block_content, $block ) { | |
| $block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] ); | |
| $block_attributes = ( isset( $block['attrs'] ) && is_array( $block['attrs'] ) ) ? $block['attrs'] : array(); | |
| $has_background_image_support = block_has_support( $block_type, array( 'background', 'backgroundImage' ), false ); | |
| if ( | |
| ! $has_background_image_support || | |
| wp_should_skip_block_supports_serialization( $block_type, 'background', 'backgroundImage' ) || | |
| ! isset( $block_attributes['style']['background'] ) | |
| ) { | |
| return $block_content; | |
| } | |
| $background_styles = array(); | |
| $background_styles['backgroundImage'] = isset( $block_attributes['style']['background']['backgroundImage'] ) ? $block_attributes['style']['background']['backgroundImage'] : array(); | |
| if ( ! empty( $background_styles['backgroundImage'] ) ) { | |
| $background_styles['backgroundSize'] = isset( $block_attributes['style']['background']['backgroundSize'] ) ? $block_attributes['style']['background']['backgroundSize'] : 'cover'; | |
| $background_styles['backgroundPosition'] = isset( $block_attributes['style']['background']['backgroundPosition'] ) ? $block_attributes['style']['background']['backgroundPosition'] : null; | |
| $background_styles['backgroundRepeat'] = isset( $block_attributes['style']['background']['backgroundRepeat'] ) ? $block_attributes['style']['background']['backgroundRepeat'] : null; | |
| // If the background size is set to `contain` and no position is set, set the position to `center`. | |
| if ( 'contain' === $background_styles['backgroundSize'] && ! $background_styles['backgroundPosition'] ) { | |
| $background_styles['backgroundPosition'] = 'center'; | |
| } | |
| } | |
| $styles = wp_style_engine_get_styles( array( 'background' => $background_styles ) ); | |
| if ( ! empty( $styles['css'] ) ) { | |
| // Inject background styles to the first element, presuming it's the wrapper, if it exists. | |
| $tags = new WP_HTML_Tag_Processor( $block_content ); | |
| if ( $tags->next_tag() ) { | |
| $existing_style = $tags->get_attribute( 'style' ); | |
| $updated_style = ''; | |
| if ( ! empty( $existing_style ) ) { | |
| $updated_style = $existing_style; | |
| if ( ! str_ends_with( $existing_style, ';' ) ) { | |
| $updated_style .= ';'; | |
| } | |
| } | |
| $updated_style .= $styles['css']; | |
| $tags->set_attribute( 'style', $updated_style ); | |
| $tags->add_class( 'has-background' ); | |
| } | |
| return $tags->get_updated_html(); | |
| } | |
| return $block_content; | |
| } | |
| // Register the block support. | |
| WP_Block_Supports::get_instance()->register( | |
| 'background', | |
| array( | |
| 'register_attribute' => 'wp_register_background_support', | |
| ) | |
| ); | |
| add_filter( 'render_block', 'wp_render_background_support', 10, 2 ); | |