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wp_render_layout_support_flag is private and should not be used in themes or plugins directly.
wp_render_layout_support_flag › WordPress Function
Since5.8.0
Deprecatedn/a
› wp_render_layout_support_flag ( $block_content, $block )
Access: |
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Parameters: (2) |
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Returns: |
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Defined at: |
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Codex: | |
Change Log: |
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Renders the layout config to the block wrapper.
Source
function wp_render_layout_support_flag( $block_content, $block ) {
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
$block_supports_layout = block_has_support( $block_type, 'layout', false ) || block_has_support( $block_type, '__experimentalLayout', false );
$child_layout = isset( $block['attrs']['style']['layout'] ) ? $block['attrs']['style']['layout'] : null;
if ( ! $block_supports_layout && ! $child_layout ) {
return $block_content;
}
$outer_class_names = array();
// Child layout specific logic.
if ( $child_layout ) {
$container_content_class = wp_unique_prefixed_id( 'wp-container-content-' );
$child_layout_declarations = array();
$child_layout_styles = array();
$self_stretch = isset( $child_layout['selfStretch'] ) ? $child_layout['selfStretch'] : null;
if ( 'fixed' === $self_stretch && isset( $child_layout['flexSize'] ) ) {
$child_layout_declarations['flex-basis'] = $child_layout['flexSize'];
$child_layout_declarations['box-sizing'] = 'border-box';
} elseif ( 'fill' === $self_stretch ) {
$child_layout_declarations['flex-grow'] = '1';
}
if ( isset( $child_layout['columnSpan'] ) ) {
$column_span = $child_layout['columnSpan'];
$child_layout_declarations['grid-column'] = "span $column_span";
}
if ( isset( $child_layout['rowSpan'] ) ) {
$row_span = $child_layout['rowSpan'];
$child_layout_declarations['grid-row'] = "span $row_span";
}
$child_layout_styles[] = array(
'selector' => ".$container_content_class",
'declarations' => $child_layout_declarations,
);
/*
* If columnSpan is set, and the parent grid is responsive, i.e. if it has a minimumColumnWidth set,
* the columnSpan should be removed on small grids. If there's a minimumColumnWidth, the grid is responsive.
* But if the minimumColumnWidth value wasn't changed, it won't be set. In that case, if columnCount doesn't
* exist, we can assume that the grid is responsive.
*/
if ( isset( $child_layout['columnSpan'] ) && ( isset( $block['parentLayout']['minimumColumnWidth'] ) || ! isset( $block['parentLayout']['columnCount'] ) ) ) {
$column_span_number = floatval( $child_layout['columnSpan'] );
$parent_column_width = isset( $block['parentLayout']['minimumColumnWidth'] ) ? $block['parentLayout']['minimumColumnWidth'] : '12rem';
$parent_column_value = floatval( $parent_column_width );
$parent_column_unit = explode( $parent_column_value, $parent_column_width );
/*
* If there is no unit, the width has somehow been mangled so we reset both unit and value
* to defaults.
* Additionally, the unit should be one of px, rem or em, so that also needs to be checked.
*/
if ( count( $parent_column_unit ) <= 1 ) {
$parent_column_unit = 'rem';
$parent_column_value = 12;
} else {
$parent_column_unit = $parent_column_unit[1];
if ( ! in_array( $parent_column_unit, array( 'px', 'rem', 'em' ), true ) ) {
$parent_column_unit = 'rem';
}
}
/*
* A default gap value is used for this computation because custom gap values may not be
* viable to use in the computation of the container query value.
*/
$default_gap_value = 'px' === $parent_column_unit ? 24 : 1.5;
$container_query_value = $column_span_number * $parent_column_value + ( $column_span_number - 1 ) * $default_gap_value;
$container_query_value = $container_query_value . $parent_column_unit;
$child_layout_styles[] = array(
'rules_group' => "@container (max-width: $container_query_value )",
'selector' => ".$container_content_class",
'declarations' => array(
'grid-column' => '1/-1',
),
);
}
/*
* Add to the style engine store to enqueue and render layout styles.
* Return styles here just to check if any exist.
*/
$child_css = wp_style_engine_get_stylesheet_from_css_rules(
$child_layout_styles,
array(
'context' => 'block-supports',
'prettify' => false,
)
);
if ( $child_css ) {
$outer_class_names[] = $container_content_class;
}
}
// Prep the processor for modifying the block output.
$processor = new WP_HTML_Tag_Processor( $block_content );
// Having no tags implies there are no tags onto which to add class names.
if ( ! $processor->next_tag() ) {
return $block_content;
}
/*
* A block may not support layout but still be affected by a parent block's layout.
*
* In these cases add the appropriate class names and then return early; there's
* no need to investigate on this block whether additional layout constraints apply.
*/
if ( ! $block_supports_layout && ! empty( $outer_class_names ) ) {
foreach ( $outer_class_names as $class_name ) {
$processor->add_class( $class_name );
}
return $processor->get_updated_html();
} elseif ( ! $block_supports_layout ) {
// Ensure layout classnames are not injected if there is no layout support.
return $block_content;
}
$global_settings = wp_get_global_settings();
$fallback_layout = isset( $block_type->supports['layout']['default'] )
? $block_type->supports['layout']['default']
: array();
if ( empty( $fallback_layout ) ) {
$fallback_layout = isset( $block_type->supports['__experimentalLayout']['default'] )
? $block_type->supports['__experimentalLayout']['default']
: array();
}
$used_layout = isset( $block['attrs']['layout'] ) ? $block['attrs']['layout'] : $fallback_layout;
$class_names = array();
$layout_definitions = wp_get_layout_definitions();
/*
* Uses an incremental ID that is independent per prefix to make sure that
* rendering different numbers of blocks doesn't affect the IDs of other
* blocks. Makes the CSS class names stable across paginations
* for features like the enhanced pagination of the Query block.
*/
$container_class = wp_unique_prefixed_id(
'wp-container-' . sanitize_title( $block['blockName'] ) . '-is-layout-'
);
// Set the correct layout type for blocks using legacy content width.
if ( isset( $used_layout['inherit'] ) && $used_layout['inherit'] || isset( $used_layout['contentSize'] ) && $used_layout['contentSize'] ) {
$used_layout['type'] = 'constrained';
}
$root_padding_aware_alignments = isset( $global_settings['useRootPaddingAwareAlignments'] )
? $global_settings['useRootPaddingAwareAlignments']
: false;
if (
$root_padding_aware_alignments &&
isset( $used_layout['type'] ) &&
'constrained' === $used_layout['type']
) {
$class_names[] = 'has-global-padding';
}
/*
* The following section was added to reintroduce a small set of layout classnames that were
* removed in the 5.9 release (https://github.com/WordPress/gutenberg/issues/38719). It is
* not intended to provide an extended set of classes to match all block layout attributes
* here.
*/
if ( ! empty( $block['attrs']['layout']['orientation'] ) ) {
$class_names[] = 'is-' . sanitize_title( $block['attrs']['layout']['orientation'] );
}
if ( ! empty( $block['attrs']['layout']['justifyContent'] ) ) {
$class_names[] = 'is-content-justification-' . sanitize_title( $block['attrs']['layout']['justifyContent'] );
}
if ( ! empty( $block['attrs']['layout']['flexWrap'] ) && 'nowrap' === $block['attrs']['layout']['flexWrap'] ) {
$class_names[] = 'is-nowrap';
}
// Get classname for layout type.
if ( isset( $used_layout['type'] ) ) {
$layout_classname = isset( $layout_definitions[ $used_layout['type'] ]['className'] )
? $layout_definitions[ $used_layout['type'] ]['className']
: '';
} else {
$layout_classname = isset( $layout_definitions['default']['className'] )
? $layout_definitions['default']['className']
: '';
}
if ( $layout_classname && is_string( $layout_classname ) ) {
$class_names[] = sanitize_title( $layout_classname );
}
/*
* Only generate Layout styles if the theme has not opted-out.
* Attribute-based Layout classnames are output in all cases.
*/
if ( ! current_theme_supports( 'disable-layout-styles' ) ) {
$gap_value = isset( $block['attrs']['style']['spacing']['blockGap'] )
? $block['attrs']['style']['spacing']['blockGap']
: null;
/*
* Skip if gap value contains unsupported characters.
* Regex for CSS value borrowed from `safecss_filter_attr`, and used here
* to only match against the value, not the CSS attribute.
*/
if ( is_array( $gap_value ) ) {
foreach ( $gap_value as $key => $value ) {
$gap_value[ $key ] = $value && preg_match( '%[\\\(&=}]|/\*%', $value ) ? null : $value;
}
} else {
$gap_value = $gap_value && preg_match( '%[\\\(&=}]|/\*%', $gap_value ) ? null : $gap_value;
}
$fallback_gap_value = isset( $block_type->supports['spacing']['blockGap']['__experimentalDefault'] )
? $block_type->supports['spacing']['blockGap']['__experimentalDefault']
: '0.5em';
$block_spacing = isset( $block['attrs']['style']['spacing'] )
? $block['attrs']['style']['spacing']
: null;
/*
* If a block's block.json skips serialization for spacing or spacing.blockGap,
* don't apply the user-defined value to the styles.
*/
$should_skip_gap_serialization = wp_should_skip_block_supports_serialization( $block_type, 'spacing', 'blockGap' );
$block_gap = isset( $global_settings['spacing']['blockGap'] )
? $global_settings['spacing']['blockGap']
: null;
$has_block_gap_support = isset( $block_gap );
$style = wp_get_layout_style(
".$container_class",
$used_layout,
$has_block_gap_support,
$gap_value,
$should_skip_gap_serialization,
$fallback_gap_value,
$block_spacing
);
// Only add container class and enqueue block support styles if unique styles were generated.
if ( ! empty( $style ) ) {
$class_names[] = $container_class;
}
}
// Add combined layout and block classname for global styles to hook onto.
$block_name = explode( '/', $block['blockName'] );
$class_names[] = 'wp-block-' . end( $block_name ) . '-' . $layout_classname;
// Add classes to the outermost HTML tag if necessary.
if ( ! empty( $outer_class_names ) ) {
foreach ( $outer_class_names as $outer_class_name ) {
$processor->add_class( $outer_class_name );
}
}
/**
* Attempts to refer to the inner-block wrapping element by its class attribute.
*
* When examining a block's inner content, if a block has inner blocks, then
* the first content item will likely be a text (HTML) chunk immediately
* preceding the inner blocks. The last HTML tag in that chunk would then be
* an opening tag for an element that wraps the inner blocks.
*
* There's no reliable way to associate this wrapper in $block_content because
* it may have changed during the rendering pipeline (as inner contents is
* provided before rendering) and through previous filters. In many cases,
* however, the `class` attribute will be a good-enough identifier, so this
* code finds the last tag in that chunk and stores the `class` attribute
* so that it can be used later when working through the rendered block output
* to identify the wrapping element and add the remaining class names to it.
*
* It's also possible that no inner block wrapper even exists. If that's the
* case this code could apply the class names to an invalid element.
*
* Example:
*
* $block['innerBlocks'] = array( $list_item );
* $block['innerContent'] = array( '<ul class="list-wrapper is-unordered">', null, '</ul>' );
*
* // After rendering, the initial contents may have been modified by other renderers or filters.
* $block_content = <<<HTML
* <figure>
* <ul class="annotated-list list-wrapper is-unordered">
* <li>Code</li>
* </ul><figcaption>It's a list!</figcaption>
* </figure>
* HTML;
*
* Although it is possible that the original block-wrapper classes are changed in $block_content
* from how they appear in $block['innerContent'], it's likely that the original class attributes
* are still present in the wrapper as they are in this example. Frequently, additional classes
* will also be present; rarely should classes be removed.
*
* @todo Find a better way to match the first inner block. If it's possible to identify where the
* first inner block starts, then it will be possible to find the last tag before it starts
* and then that tag, if an opening tag, can be solidly identified as a wrapping element.
* Can some unique value or class or ID be added to the inner blocks when they process
* so that they can be extracted here safely without guessing? Can the block rendering function
* return information about where the rendered inner blocks start?
*
* @var string|null
*/
$inner_block_wrapper_classes = null;
$first_chunk = isset( $block['innerContent'][0] ) ? $block['innerContent'][0] : null;
if ( is_string( $first_chunk ) && count( $block['innerContent'] ) > 1 ) {
$first_chunk_processor = new WP_HTML_Tag_Processor( $first_chunk );
while ( $first_chunk_processor->next_tag() ) {
$class_attribute = $first_chunk_processor->get_attribute( 'class' );
if ( is_string( $class_attribute ) && ! empty( $class_attribute ) ) {
$inner_block_wrapper_classes = $class_attribute;
}
}
}
/*
* If necessary, advance to what is likely to be an inner block wrapper tag.
*
* This advances until it finds the first tag containing the original class
* attribute from above. If none is found it will scan to the end of the block
* and fail to add any class names.
*
* If there is no block wrapper it won't advance at all, in which case the
* class names will be added to the first and outermost tag of the block.
* For cases where this outermost tag is the only tag surrounding inner
* blocks then the outer wrapper and inner wrapper are the same.
*/
do {
if ( ! $inner_block_wrapper_classes ) {
break;
}
$class_attribute = $processor->get_attribute( 'class' );
if ( is_string( $class_attribute ) && str_contains( $class_attribute, $inner_block_wrapper_classes ) ) {
break;
}
} while ( $processor->next_tag() );
// Add the remaining class names.
foreach ( $class_names as $class_name ) {
$processor->add_class( $class_name );
}
return $processor->get_updated_html();
}