JezK

Edit File: background.php

<?php /** * 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. * @since 6.7.0 Added support for `backgroundAttachment` output. * @since 7.1.0 Added support for `background.gradient` output. * * @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 ); $has_background_gradient_support = block_has_support( $block_type, array( 'background', 'gradient' ), false ); if ( ( ! $has_background_image_support && ! $has_background_gradient_support ) || ! isset( $block_attributes['style']['background'] ) ) { return $block_content; } // Check serialization skip for each feature individually. $skip_background_image = ! $has_background_image_support || wp_should_skip_block_supports_serialization( $block_type, 'background', 'backgroundImage' ); $skip_background_gradient = ! $has_background_gradient_support || wp_should_skip_block_supports_serialization( $block_type, 'background', 'gradient' ); if ( $skip_background_image && $skip_background_gradient ) { return $block_content; } $background_styles = array(); if ( ! $skip_background_image ) { $background_styles['backgroundImage'] = $block_attributes['style']['background']['backgroundImage'] ?? null; $background_styles['backgroundSize'] = $block_attributes['style']['background']['backgroundSize'] ?? null; $background_styles['backgroundPosition'] = $block_attributes['style']['background']['backgroundPosition'] ?? null; $background_styles['backgroundRepeat'] = $block_attributes['style']['background']['backgroundRepeat'] ?? null; $background_styles['backgroundAttachment'] = $block_attributes['style']['background']['backgroundAttachment'] ?? null; if ( ! empty( $background_styles['backgroundImage'] ) ) { $background_styles['backgroundSize'] = $background_styles['backgroundSize'] ?? 'cover'; // 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'] = '50% 50%'; } } } if ( ! $skip_background_gradient ) { $background_styles['gradient'] = $block_attributes['style']['background']['gradient'] ?? null; } $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' ); if ( is_string( $existing_style ) && '' !== $existing_style ) { $separator = str_ends_with( $existing_style, ';' ) ? '' : ';'; $updated_style = "{$existing_style}{$separator}{$styles['css']}"; } else { $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 );
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