Adding upstream version 6.4.3+dfsg1.upstream/6.4.3+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 232 insertions, 0 deletions

diff --git a/wp-includes/block-supports/elements.php b/wp-includes/block-supports/elements.php
new file mode 100644
index 0000000..4f3de8c
--- /dev/null
+++ b/wp-includes/block-supports/elements.php
@@ -0,0 +1,232 @@
+<?php
+/**
+ * Elements styles block support.
+ *
+ * @package WordPress
+ * @since 5.8.0
+ */
+
+/**
+ * Gets the elements class names.
+ *
+ * @since 6.0.0
+ * @access private
+ *
+ * @param array $block Block object.
+ * @return string The unique class name.
+ */
+function wp_get_elements_class_name( $block ) {
+	return 'wp-elements-' . md5( serialize( $block ) );
+}
+
+/**
+ * Updates the block content with elements class names.
+ *
+ * @since 5.8.0
+ * @since 6.4.0 Added support for button and heading element styling.
+ * @access private
+ *
+ * @param string $block_content Rendered block content.
+ * @param array  $block         Block object.
+ * @return string Filtered block content.
+ */
+function wp_render_elements_support( $block_content, $block ) {
+	if ( ! $block_content || ! isset( $block['attrs']['style']['elements'] ) ) {
+		return $block_content;
+	}
+
+	$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
+	if ( ! $block_type ) {
+		return $block_content;
+	}
+
+	$element_color_properties = array(
+		'button'  => array(
+			'skip'  => wp_should_skip_block_supports_serialization( $block_type, 'color', 'button' ),
+			'paths' => array(
+				array( 'button', 'color', 'text' ),
+				array( 'button', 'color', 'background' ),
+				array( 'button', 'color', 'gradient' ),
+			),
+		),
+		'link'    => array(
+			'skip'  => wp_should_skip_block_supports_serialization( $block_type, 'color', 'link' ),
+			'paths' => array(
+				array( 'link', 'color', 'text' ),
+				array( 'link', ':hover', 'color', 'text' ),
+			),
+		),
+		'heading' => array(
+			'skip'  => wp_should_skip_block_supports_serialization( $block_type, 'color', 'heading' ),
+			'paths' => array(
+				array( 'heading', 'color', 'text' ),
+				array( 'heading', 'color', 'background' ),
+				array( 'heading', 'color', 'gradient' ),
+				array( 'h1', 'color', 'text' ),
+				array( 'h1', 'color', 'background' ),
+				array( 'h1', 'color', 'gradient' ),
+				array( 'h2', 'color', 'text' ),
+				array( 'h2', 'color', 'background' ),
+				array( 'h2', 'color', 'gradient' ),
+				array( 'h3', 'color', 'text' ),
+				array( 'h3', 'color', 'background' ),
+				array( 'h3', 'color', 'gradient' ),
+				array( 'h4', 'color', 'text' ),
+				array( 'h4', 'color', 'background' ),
+				array( 'h4', 'color', 'gradient' ),
+				array( 'h5', 'color', 'text' ),
+				array( 'h5', 'color', 'background' ),
+				array( 'h5', 'color', 'gradient' ),
+				array( 'h6', 'color', 'text' ),
+				array( 'h6', 'color', 'background' ),
+				array( 'h6', 'color', 'gradient' ),
+			),
+		),
+	);
+
+	$skip_all_element_color_serialization = $element_color_properties['button']['skip'] &&
+		$element_color_properties['link']['skip'] &&
+		$element_color_properties['heading']['skip'];
+
+	if ( $skip_all_element_color_serialization ) {
+		return $block_content;
+	}
+
+	$elements_style_attributes = $block['attrs']['style']['elements'];
+
+	foreach ( $element_color_properties as $element_config ) {
+		if ( $element_config['skip'] ) {
+			continue;
+		}
+
+		foreach ( $element_config['paths'] as $path ) {
+			if ( null !== _wp_array_get( $elements_style_attributes, $path, null ) ) {
+				/*
+				 * It only takes a single custom attribute to require that the custom
+				 * class name be added to the block, so once one is found there's no
+				 * need to continue looking for others.
+				 *
+				 * As is done with the layout hook, this code assumes that the block
+				 * contains a single wrapper and that it's the first element in the
+				 * rendered output. That first element, if it exists, gets the class.
+				 */
+				$tags = new WP_HTML_Tag_Processor( $block_content );
+				if ( $tags->next_tag() ) {
+					$tags->add_class( wp_get_elements_class_name( $block ) );
+				}
+
+				return $tags->get_updated_html();
+			}
+		}
+	}
+
+	// If no custom attributes were found then there's nothing to modify.
+	return $block_content;
+}
+
+/**
+ * Renders the elements stylesheet.
+ *
+ * In the case of nested blocks we want the parent element styles to be rendered before their descendants.
+ * This solves the issue of an element (e.g.: link color) being styled in both the parent and a descendant:
+ * we want the descendant style to take priority, and this is done by loading it after, in DOM order.
+ *
+ * @since 6.0.0
+ * @since 6.1.0 Implemented the style engine to generate CSS and classnames.
+ * @access private
+ *
+ * @param string|null $pre_render The pre-rendered content. Default null.
+ * @param array       $block      The block being rendered.
+ * @return null
+ */
+function wp_render_elements_support_styles( $pre_render, $block ) {
+	$block_type           = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
+	$element_block_styles = isset( $block['attrs']['style']['elements'] ) ? $block['attrs']['style']['elements'] : null;
+
+	if ( ! $element_block_styles ) {
+		return null;
+	}
+
+	$skip_link_color_serialization         = wp_should_skip_block_supports_serialization( $block_type, 'color', 'link' );
+	$skip_heading_color_serialization      = wp_should_skip_block_supports_serialization( $block_type, 'color', 'heading' );
+	$skip_button_color_serialization       = wp_should_skip_block_supports_serialization( $block_type, 'color', 'button' );
+	$skips_all_element_color_serialization = $skip_link_color_serialization &&
+		$skip_heading_color_serialization &&
+		$skip_button_color_serialization;
+
+	if ( $skips_all_element_color_serialization ) {
+		return null;
+	}
+
+	$class_name = wp_get_elements_class_name( $block );
+
+	$element_types = array(
+		'button'  => array(
+			'selector' => ".$class_name .wp-element-button, .$class_name .wp-block-button__link",
+			'skip'     => $skip_button_color_serialization,
+		),
+		'link'    => array(
+			'selector'       => ".$class_name a",
+			'hover_selector' => ".$class_name a:hover",
+			'skip'           => $skip_link_color_serialization,
+		),
+		'heading' => array(
+			'selector' => ".$class_name h1, .$class_name h2, .$class_name h3, .$class_name h4, .$class_name h5, .$class_name h6",
+			'skip'     => $skip_heading_color_serialization,
+			'elements' => array( 'h1', 'h2', 'h3', 'h4', 'h5', 'h6' ),
+		),
+	);
+
+	foreach ( $element_types as $element_type => $element_config ) {
+		if ( $element_config['skip'] ) {
+			continue;
+		}
+
+		$element_style_object = isset( $element_block_styles[ $element_type ] ) ? $element_block_styles[ $element_type ] : null;
+
+		// Process primary element type styles.
+		if ( $element_style_object ) {
+			wp_style_engine_get_styles(
+				$element_style_object,
+				array(
+					'selector' => $element_config['selector'],
+					'context'  => 'block-supports',
+				)
+			);
+
+			if ( isset( $element_style_object[':hover'] ) ) {
+				wp_style_engine_get_styles(
+					$element_style_object[':hover'],
+					array(
+						'selector' => $element_config['hover_selector'],
+						'context'  => 'block-supports',
+					)
+				);
+			}
+		}
+
+		// Process related elements e.g. h1-h6 for headings.
+		if ( isset( $element_config['elements'] ) ) {
+			foreach ( $element_config['elements'] as $element ) {
+				$element_style_object = isset( $element_block_styles[ $element ] )
+					? $element_block_styles[ $element ]
+					: null;
+
+				if ( $element_style_object ) {
+					wp_style_engine_get_styles(
+						$element_style_object,
+						array(
+							'selector' => ".$class_name $element",
+							'context'  => 'block-supports',
+						)
+					);
+				}
+			}
+		}
+	}
+
+	return null;
+}
+
+add_filter( 'render_block', 'wp_render_elements_support', 10, 2 );
+add_filter( 'pre_render_block', 'wp_render_elements_support_styles', 10, 2 );