741 lines
21 KiB
PHP
741 lines
21 KiB
PHP
<?php
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/**
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* Block state support for frontend CSS generation.
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*
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* Generates scoped CSS for per-instance state styles declared in block attributes,
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* including pseudo-states (e.g., `style[':hover']`) and responsive states
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* (e.g., `style['@mobile']` and `style['@mobile'][':hover']`).
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*
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* @package WordPress
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* @since 7.1.0
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*/
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/**
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* Converts internal preset references to CSS custom property references.
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*
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* State styles are emitted as CSS rules and cannot rely on preset classnames.
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* Converting `var:preset|color|contrast` to
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* `var(--wp--preset--color--contrast)` ensures preset values are emitted as
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* declarations by the style engine.
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*
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* @since 7.1.0
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*
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* @param mixed $value Style value to normalize.
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* @return mixed Normalized style value.
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*/
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function wp_normalize_state_preset_vars( $value ) {
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if ( is_array( $value ) ) {
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foreach ( $value as $key => $nested_value ) {
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$value[ $key ] = wp_normalize_state_preset_vars( $nested_value );
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}
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return $value;
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}
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if ( ! is_string( $value ) || ! str_starts_with( $value, 'var:preset|' ) ) {
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return $value;
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}
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$unwrapped_name = str_replace( '|', '--', substr( $value, strlen( 'var:' ) ) );
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return "var(--wp--$unwrapped_name)";
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}
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/**
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* Normalizes a state style object before generating CSS declarations.
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*
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* @since 7.1.0
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*
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* @param array $style State style object.
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* @return array Normalized state style object.
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*/
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function wp_normalize_state_style_for_css_output( $style ) {
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// Layout is processed separately by wp_render_layout_support_flag(), so we remove it before declaration generation.
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unset( $style['layout'] );
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$style = wp_normalize_state_preset_vars( $style );
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return $style;
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}
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/**
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* Adds fallback border-style declarations for visible border declarations.
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*
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* CSS does not render border color or width unless a border style is also set.
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* State styles are emitted as stylesheet rules rather than inline styles, so
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* they cannot rely on the block-library inline-style attribute fallback rules.
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*
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* @since 7.1.0
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*
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* @param array $declarations CSS declarations generated by the style engine.
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* @return array CSS declarations with fallback border styles applied where needed.
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*/
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function wp_get_state_declarations_with_fallback_border_styles( $declarations ) {
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if ( ! is_array( $declarations ) ) {
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return $declarations;
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}
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$has_border_style = isset( $declarations['border-style'] ) && '' !== $declarations['border-style'];
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$has_border_color = isset( $declarations['border-color'] ) && '' !== $declarations['border-color'];
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$has_border_width = isset( $declarations['border-width'] ) && '' !== $declarations['border-width'];
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if ( ! $has_border_style && ( $has_border_color || $has_border_width ) ) {
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$declarations['border-style'] = 'solid';
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}
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$sides = array( 'top', 'right', 'bottom', 'left' );
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foreach ( $sides as $side ) {
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$side_style_property = "border-$side-style";
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$side_color_property = "border-$side-color";
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$side_width_property = "border-$side-width";
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$has_side_style = isset( $declarations[ $side_style_property ] ) && '' !== $declarations[ $side_style_property ];
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$has_side_color = isset( $declarations[ $side_color_property ] ) && '' !== $declarations[ $side_color_property ];
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$has_side_width = isset( $declarations[ $side_width_property ] ) && '' !== $declarations[ $side_width_property ];
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if ( ! $has_border_style && ! $has_side_style && ( $has_side_color || $has_side_width ) ) {
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$declarations[ $side_style_property ] = 'solid';
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}
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}
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return $declarations;
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}
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/**
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* Adds background reset declarations to prevent gradient/solid color conflicts.
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*
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* When a state sets a solid background-color, any gradient applied to the
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* default state (via `background` shorthand or `background-image`) must be
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* explicitly cleared. Without this, the gradient image layer remains visible
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* on top of the solid hover color even when `!important` is used, because
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* `background-color` and `background-image` are separate CSS properties.
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*
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* @since 7.1.0
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*
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* @param array $declarations CSS declarations generated by the style engine.
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* @return array CSS declarations with background resets applied where needed.
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*/
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function wp_get_state_declarations_with_background_resets( $declarations ) {
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if ( ! is_array( $declarations ) ) {
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return $declarations;
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}
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$has_background_color = isset( $declarations['background-color'] ) && '' !== $declarations['background-color'];
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$has_background = isset( $declarations['background'] ) && '' !== $declarations['background'];
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$has_background_image = isset( $declarations['background-image'] ) && '' !== $declarations['background-image'];
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/*
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* When the state sets a solid background-color but no gradient of its own,
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* emit `background-image: unset` to clear any gradient (whether stored as
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* the `background` shorthand or as `background-image`) that was applied to
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* the default / normal state via an inline style attribute. The declaration
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* is marked important when the state rule is registered with the style engine.
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*/
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if ( $has_background_color && ! $has_background && ! $has_background_image ) {
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$declarations['background-image'] = 'unset';
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}
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return $declarations;
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}
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/**
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* Adds fallback dimension styles for aspectRatio and height block-support values.
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*
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* @since 7.1.0
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*
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* @param array $state_style State style object.
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* @return array State style object with fallback dimension styles applied where needed.
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*/
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function wp_get_state_style_with_fallback_dimension_styles( $state_style ) {
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if ( ! is_array( $state_style ) ) {
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return $state_style;
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}
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$dimensions = isset( $state_style['dimensions'] ) && is_array( $state_style['dimensions'] )
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? $state_style['dimensions']
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: array();
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if ( empty( $dimensions ) ) {
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return $state_style;
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}
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if ( wp_is_explicit_aspect_ratio_value( $dimensions['aspectRatio'] ?? null ) ) {
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return array_replace_recursive(
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$state_style,
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array(
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'dimensions' => array(
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'minHeight' => 'unset',
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'height' => 'unset',
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),
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)
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);
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}
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$has_min_height = isset( $dimensions['minHeight'] ) && ( is_string( $dimensions['minHeight'] ) || is_numeric( $dimensions['minHeight'] ) ) && '' !== trim( (string) $dimensions['minHeight'] );
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$has_height = isset( $dimensions['height'] ) && ( is_string( $dimensions['height'] ) || is_numeric( $dimensions['height'] ) ) && '' !== trim( (string) $dimensions['height'] );
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if ( $has_min_height || $has_height ) {
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return array_replace_recursive(
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$state_style,
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array(
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'dimensions' => array(
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'aspectRatio' => 'unset',
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),
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)
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);
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}
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return $state_style;
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}
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/**
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* Adds a style fragment to a selector-keyed state style group.
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*
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* @since 7.1.0
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*
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* @param array $groups Selector-keyed style groups.
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* @param string|null $selector Block or feature selector.
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* @param array $style Style fragment.
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*/
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function wp_add_state_style_group( &$groups, $selector, $style ) {
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$key = is_string( $selector ) ? $selector : '';
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if ( ! isset( $groups[ $key ] ) ) {
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$groups[ $key ] = array(
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'selector' => $selector,
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'style' => array(),
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);
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}
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$groups[ $key ]['style'] = array_replace_recursive( $groups[ $key ]['style'], $style );
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}
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/**
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* Splits a state style object into groups based on block feature selectors.
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*
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* @since 7.1.0
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*
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* @param array $state_style State style object.
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* @param array $block_selectors Block selectors metadata.
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* @return array[] Selector/style groups.
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*/
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function wp_get_state_style_groups( $state_style, $block_selectors ) {
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$groups = array();
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foreach ( $state_style as $feature => $feature_styles ) {
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$feature_selectors = $block_selectors[ $feature ] ?? null;
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if ( is_string( $feature_selectors ) ) {
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wp_add_state_style_group(
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$groups,
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$feature_selectors,
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array( $feature => $feature_styles )
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);
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continue;
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}
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if ( is_array( $feature_selectors ) && is_array( $feature_styles ) ) {
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$remaining_styles = $feature_styles;
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foreach ( $feature_selectors as $subfeature => $subfeature_selector ) {
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if (
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'root' === $subfeature ||
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! is_string( $subfeature_selector ) ||
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! array_key_exists( $subfeature, $feature_styles )
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) {
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continue;
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}
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wp_add_state_style_group(
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$groups,
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$subfeature_selector,
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array(
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$feature => array(
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$subfeature => $feature_styles[ $subfeature ],
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),
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)
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);
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unset( $remaining_styles[ $subfeature ] );
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}
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if ( array() !== $remaining_styles ) {
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wp_add_state_style_group(
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$groups,
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$feature_selectors['root'] ?? ( $block_selectors['root'] ?? null ),
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array( $feature => $remaining_styles )
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);
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}
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continue;
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}
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wp_add_state_style_group(
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$groups,
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$block_selectors['root'] ?? null,
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array( $feature => $feature_styles )
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);
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}
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return array_values( $groups );
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}
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/**
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* Returns a style object with nested state keys removed.
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*
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* @since 7.1.0
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*
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* @param array $state_style State style object.
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* @param array $nested_keys Keys to remove from the root style object.
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* @return array Root-only style object.
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*/
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function wp_get_root_state_style( $state_style, $nested_keys ) {
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if ( ! is_array( $state_style ) ) {
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return $state_style;
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}
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$root_style = $state_style;
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foreach ( $nested_keys as $key ) {
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unset( $root_style[ $key ] );
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}
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return $root_style;
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}
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/**
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* Generates all element selectors for a block root selector.
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*
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* @since 7.1.0
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*
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* @param string $root_selector The block root CSS selector.
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* @return string[] Element selectors keyed by element name.
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*/
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function wp_get_block_state_element_selectors( $root_selector ) {
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if ( ! is_string( $root_selector ) || '' === trim( $root_selector ) ) {
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return array();
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}
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$block_selectors = wp_split_selector_list( $root_selector );
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$element_selectors = array();
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foreach ( WP_Theme_JSON::ELEMENTS as $element_name => $element_selector ) {
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$selectors = array();
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foreach ( $block_selectors as $block_selector ) {
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$block_selector = trim( $block_selector );
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if ( '' === $block_selector ) {
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continue;
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}
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if ( $block_selector === $element_selector ) {
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$selectors = array( $element_selector );
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break;
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}
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$selector_prefix = "$block_selector ";
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if ( ! str_contains( $element_selector, ',' ) ) {
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$selectors[] = $selector_prefix . $element_selector;
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continue;
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}
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$prepended_selectors = array();
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foreach ( wp_split_selector_list( $element_selector ) as $selector ) {
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$prepended_selectors[] = $selector_prefix . $selector;
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}
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$selectors[] = implode( ',', $prepended_selectors );
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}
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if ( ! empty( $selectors ) ) {
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$element_selectors[ $element_name ] = implode( ',', $selectors );
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}
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}
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return $element_selectors;
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}
|
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|
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/**
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* Adds a compiled state style rule to a rule list.
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*
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* @since 7.1.0
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*
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* @param array $css_rules Style rules.
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* @param string $state Pseudo-state selector.
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* @param string|null $selector Block, feature, or element selector.
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* @param array $style Style object.
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* @param string|null $rules_group Optional CSS grouping rule, e.g. a media query.
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*/
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function wp_add_block_state_style_rule( &$css_rules, $state, $selector, $style, $rules_group = null ) {
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if ( empty( $style ) || ! is_array( $style ) ) {
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return;
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}
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$compiled = wp_style_engine_get_styles(
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wp_normalize_state_style_for_css_output( $style )
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);
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$declarations = $compiled['declarations'] ?? array();
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$text_align = $style['typography']['textAlign'] ?? null;
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// Base text alignment is class-based, so state styles need a declaration.
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if ( is_string( $text_align ) && '' !== trim( $text_align ) ) {
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$declarations['text-align'] = $text_align;
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}
|
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|
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if ( empty( $declarations ) ) {
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return;
|
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}
|
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|
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$css_rules[] = array(
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'state' => $state,
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'selector' => $selector,
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'declarations' => $declarations,
|
|
);
|
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if ( ! empty( $rules_group ) ) {
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$css_rules[ count( $css_rules ) - 1 ]['rules_group'] = $rules_group;
|
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}
|
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}
|
|
|
|
/**
|
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* Builds compiled state style rules, preserving the selector each rule targets.
|
|
*
|
|
* @since 7.1.0
|
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*
|
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* @param array $state_styles Map of state to style array.
|
|
* @param WP_Block_Type $block_type Block type.
|
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* @param string|null $rules_group Optional CSS grouping rule, e.g. a media query.
|
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* @return array[] State style rules.
|
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*/
|
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function wp_get_block_state_style_rules( $state_styles, $block_type, $rules_group = null ) {
|
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$css_rules = array();
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$block_selectors = isset( $block_type->selectors ) && is_array( $block_type->selectors )
|
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? $block_type->selectors
|
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: array();
|
|
|
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foreach ( $state_styles as $state => $state_style ) {
|
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if ( empty( $state_style ) || ! is_array( $state_style ) ) {
|
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continue;
|
|
}
|
|
|
|
foreach ( wp_get_state_style_groups( $state_style, $block_selectors ) as $group ) {
|
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wp_add_block_state_style_rule(
|
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$css_rules,
|
|
$state,
|
|
$group['selector'],
|
|
$group['style'],
|
|
$rules_group
|
|
);
|
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}
|
|
}
|
|
|
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return $css_rules;
|
|
}
|
|
|
|
/**
|
|
* Returns a unique class for a set of state style rules.
|
|
*
|
|
* @since 7.1.0
|
|
*
|
|
* @param string $block_name Block name.
|
|
* @param array $css_rules State style rules.
|
|
* @return string Unique class name.
|
|
*/
|
|
function wp_get_block_state_unique_class( $block_name, $css_rules ) {
|
|
return 'wp-states-' . substr(
|
|
md5(
|
|
wp_json_encode(
|
|
array(
|
|
'blockName' => $block_name,
|
|
'rules' => $css_rules,
|
|
)
|
|
)
|
|
),
|
|
0,
|
|
8
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Splits a selector list by top-level commas.
|
|
*
|
|
* @since 7.1.0
|
|
*
|
|
* @param string $selector CSS selector list.
|
|
* @return string[] Selectors.
|
|
*/
|
|
function wp_split_selector_list( $selector ) {
|
|
if ( ! str_contains( $selector, ',' ) ) {
|
|
return array( $selector );
|
|
}
|
|
|
|
$selectors = array();
|
|
$current_selector = '';
|
|
$parentheses_depth = 0;
|
|
$selector_length = strlen( $selector );
|
|
|
|
for ( $i = 0; $i < $selector_length; $i++ ) {
|
|
$char = $selector[ $i ];
|
|
|
|
if ( '(' === $char ) {
|
|
++$parentheses_depth;
|
|
} elseif ( ')' === $char && $parentheses_depth > 0 ) {
|
|
--$parentheses_depth;
|
|
} elseif ( ',' === $char && 0 === $parentheses_depth ) {
|
|
$selectors[] = $current_selector;
|
|
$current_selector = '';
|
|
continue;
|
|
}
|
|
|
|
$current_selector .= $char;
|
|
}
|
|
|
|
$selectors[] = $current_selector;
|
|
|
|
return $selectors;
|
|
}
|
|
|
|
/**
|
|
* Builds a scoped selector from a block selector and optional pseudo-state.
|
|
*
|
|
* @since 7.1.0
|
|
*
|
|
* @param string $base_selector Block-instance scoping selector.
|
|
* @param string|null $block_selector Block or feature selector from metadata.
|
|
* @param string $state Pseudo-state selector.
|
|
* @return string Scoped selector.
|
|
*/
|
|
function wp_build_state_selector( $base_selector, $block_selector, $state ) {
|
|
if ( ! is_string( $block_selector ) || '' === trim( $block_selector ) ) {
|
|
return $base_selector . $state;
|
|
}
|
|
|
|
$selectors = wp_split_selector_list( $block_selector );
|
|
$scoped_selectors = array();
|
|
|
|
foreach ( $selectors as $selector ) {
|
|
$selector = trim( $selector );
|
|
if ( '' === $selector ) {
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Replace only the leading block selector part (e.g. class name,
|
|
* attribute selector, ID, or tag name) with the block instance selector.
|
|
* Preserve anything after that prefix, including modifier classes on the
|
|
* same element and combinators without spaces.
|
|
*/
|
|
if ( preg_match( '/^([.#]?[-_a-zA-Z0-9]+|\[[^\]]+\])/', $selector, $matches ) ) {
|
|
$scoped_selectors[] = $base_selector . substr( $selector, strlen( $matches[0] ) ) . $state;
|
|
continue;
|
|
}
|
|
|
|
$scoped_selectors[] = $base_selector . $state;
|
|
}
|
|
|
|
return empty( $scoped_selectors )
|
|
? $base_selector . $state
|
|
: implode( ', ', $scoped_selectors );
|
|
}
|
|
|
|
/**
|
|
* Renders per-instance state styles on the frontend.
|
|
*
|
|
* @since 7.1.0
|
|
*
|
|
* @param string $block_content The block's rendered HTML.
|
|
* @param array $block The block data including blockName and attrs.
|
|
* @return string Modified block content with injected state styles.
|
|
*/
|
|
function wp_render_block_states_support( $block_content, $block ) {
|
|
if ( empty( $block['blockName'] ) || empty( $block_content ) ) {
|
|
return $block_content;
|
|
}
|
|
|
|
$block_name = $block['blockName'];
|
|
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block_name );
|
|
if ( ! $block_type ) {
|
|
return $block_content;
|
|
}
|
|
|
|
$supported_pseudo_states = WP_Theme_JSON::VALID_BLOCK_PSEUDO_SELECTORS[ $block_name ] ?? array();
|
|
$style = $block['attrs']['style'] ?? array();
|
|
$css_rules = array();
|
|
$viewport_settings = wp_get_global_settings( array( 'viewport' ) );
|
|
$responsive_media_queries = WP_Theme_JSON::get_viewport_media_queries( $viewport_settings );
|
|
|
|
foreach ( $supported_pseudo_states as $pseudo_state ) {
|
|
if ( empty( $style[ $pseudo_state ] ) || ! is_array( $style[ $pseudo_state ] ) ) {
|
|
continue;
|
|
}
|
|
|
|
$css_rules = array_merge(
|
|
$css_rules,
|
|
wp_get_block_state_style_rules(
|
|
array( $pseudo_state => $style[ $pseudo_state ] ),
|
|
$block_type
|
|
)
|
|
);
|
|
}
|
|
|
|
foreach ( $responsive_media_queries as $breakpoint => $media_query ) {
|
|
if ( empty( $style[ $breakpoint ] ) || ! is_array( $style[ $breakpoint ] ) ) {
|
|
continue;
|
|
}
|
|
|
|
$root_state_style = wp_get_root_state_style(
|
|
$style[ $breakpoint ],
|
|
array_merge( array( 'elements' ), $supported_pseudo_states )
|
|
);
|
|
|
|
if ( ! empty( $root_state_style ) ) {
|
|
$css_rules = array_merge(
|
|
$css_rules,
|
|
wp_get_block_state_style_rules(
|
|
array( '' => $root_state_style ),
|
|
$block_type,
|
|
$media_query
|
|
)
|
|
);
|
|
}
|
|
|
|
if (
|
|
! empty( $style[ $breakpoint ]['elements'] ) &&
|
|
is_array( $style[ $breakpoint ]['elements'] )
|
|
) {
|
|
$element_selectors = wp_get_block_state_element_selectors(
|
|
wp_get_block_css_selector( $block_type )
|
|
);
|
|
|
|
foreach ( $style[ $breakpoint ]['elements'] as $element_name => $element_style ) {
|
|
if (
|
|
empty( $element_style ) ||
|
|
! is_array( $element_style ) ||
|
|
empty( $element_selectors[ $element_name ] )
|
|
) {
|
|
continue;
|
|
}
|
|
|
|
$element_pseudo_states = WP_Theme_JSON::VALID_ELEMENT_PSEUDO_SELECTORS[ $element_name ]
|
|
?? array();
|
|
$root_element_style = wp_get_root_state_style(
|
|
$element_style,
|
|
$element_pseudo_states
|
|
);
|
|
|
|
wp_add_block_state_style_rule(
|
|
$css_rules,
|
|
'',
|
|
$element_selectors[ $element_name ],
|
|
$root_element_style,
|
|
$media_query
|
|
);
|
|
|
|
foreach ( $element_pseudo_states as $pseudo_state ) {
|
|
if (
|
|
empty( $element_style[ $pseudo_state ] ) ||
|
|
! is_array( $element_style[ $pseudo_state ] )
|
|
) {
|
|
continue;
|
|
}
|
|
|
|
wp_add_block_state_style_rule(
|
|
$css_rules,
|
|
$pseudo_state,
|
|
$element_selectors[ $element_name ],
|
|
$element_style[ $pseudo_state ],
|
|
$media_query
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
foreach ( $supported_pseudo_states as $pseudo_state ) {
|
|
if ( empty( $style[ $breakpoint ][ $pseudo_state ] ) || ! is_array( $style[ $breakpoint ][ $pseudo_state ] ) ) {
|
|
continue;
|
|
}
|
|
|
|
$css_rules = array_merge(
|
|
$css_rules,
|
|
wp_get_block_state_style_rules(
|
|
array( $pseudo_state => $style[ $breakpoint ][ $pseudo_state ] ),
|
|
$block_type,
|
|
$media_query
|
|
)
|
|
);
|
|
}
|
|
}
|
|
|
|
if ( empty( $css_rules ) ) {
|
|
return $block_content;
|
|
}
|
|
|
|
$unique_class = wp_get_block_state_unique_class( $block_name, $css_rules );
|
|
|
|
/*
|
|
* Register each state's CSS rules with the block-supports style engine store.
|
|
* The store deduplicates rules by selector — two block instances with identical
|
|
* state styles share the same hash class and therefore the same selector,
|
|
* so only one CSS rule is emitted. The store is flushed to the page by
|
|
* wp_enqueue_stored_styles() rather than injected inline here.
|
|
*
|
|
* State declarations need !important to apply reliably over inline styles and
|
|
* preset utility classes such as .has-accent-3-background-color.
|
|
*
|
|
* Layout-driven state styles (responsive layout, blockGap, child layout) are
|
|
* handled by wp_render_layout_support_flag() so they share a selector with
|
|
* the base layout and target the correct (inner) wrapper element.
|
|
*/
|
|
$style_rules = array();
|
|
foreach ( $css_rules as $rule ) {
|
|
$declarations = $rule['declarations'];
|
|
$important_declaration_values = wp_get_state_declarations_with_background_resets( $declarations );
|
|
$important_declarations = new WP_Style_Engine_CSS_Declarations();
|
|
foreach ( $important_declaration_values as $property => $value ) {
|
|
$important_declarations->add_declaration(
|
|
$property,
|
|
$value,
|
|
array(
|
|
'important' => true,
|
|
)
|
|
);
|
|
}
|
|
$selector = wp_build_state_selector(
|
|
".$unique_class",
|
|
$rule['selector'],
|
|
$rule['state']
|
|
);
|
|
$important_style_rule = array(
|
|
'selector' => $selector,
|
|
'declarations' => $important_declarations,
|
|
);
|
|
if ( ! empty( $rule['rules_group'] ) ) {
|
|
$important_style_rule['rules_group'] = $rule['rules_group'];
|
|
}
|
|
$style_rules[] = $important_style_rule;
|
|
|
|
$fallback_declarations = wp_get_state_declarations_with_fallback_border_styles( $declarations );
|
|
foreach ( array_keys( $declarations ) as $property ) {
|
|
unset( $fallback_declarations[ $property ] );
|
|
}
|
|
|
|
if ( empty( $fallback_declarations ) ) {
|
|
continue;
|
|
}
|
|
|
|
$fallback_style_rule = array(
|
|
'selector' => $selector,
|
|
'declarations' => $fallback_declarations,
|
|
);
|
|
if ( ! empty( $rule['rules_group'] ) ) {
|
|
$fallback_style_rule['rules_group'] = $rule['rules_group'];
|
|
}
|
|
$style_rules[] = $fallback_style_rule;
|
|
}
|
|
|
|
wp_style_engine_get_stylesheet_from_css_rules(
|
|
$style_rules,
|
|
array(
|
|
'context' => 'block-supports',
|
|
'prettify' => false,
|
|
)
|
|
);
|
|
|
|
$processor = new WP_HTML_Tag_Processor( $block_content );
|
|
if ( $processor->next_tag() ) {
|
|
$processor->add_class( $unique_class );
|
|
}
|
|
return $processor->get_updated_html();
|
|
}
|
|
add_filter( 'render_block', 'wp_render_block_states_support', 10, 2 );
|