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<?php
/**
* Layout block support flag.
*
* @package WordPress
* @since 5.8.0
*/
/**
* Registers the layout block attribute for block types that support it.
*
* @since 5.8.0
* @access private
*
* @param WP_Block_Type $block_type Block Type.
*/
function wp_register_layout_support( $block_type ) {
$support_layout = block_has_support( $block_type, array( '__experimentalLayout' ), false );
if ( $support_layout ) {
if ( ! $block_type->attributes ) {
$block_type->attributes = array();
}
if ( ! array_key_exists( 'layout', $block_type->attributes ) ) {
$block_type->attributes['layout'] = array(
'type' => 'object',
);
}
}
}
/**
* Generates the CSS corresponding to the provided layout.
*
* @since 5.9.0
* @access private
*
* @param string $selector CSS selector.
* @param array $layout Layout object. The one that is passed has already checked
* the existence of default block layout.
* @param bool $has_block_gap_support Whether the theme has support for the block gap.
* @param string $gap_value The block gap value to apply.
* @return string CSS style.
*/
function wp_get_layout_style( $selector, $layout, $has_block_gap_support = false, $gap_value = null ) {
$layout_type = isset( $layout['type'] ) ? $layout['type'] : 'default';
$style = '';
if ( 'default' === $layout_type ) {
$content_size = isset( $layout['contentSize'] ) ? $layout['contentSize'] : '';
$wide_size = isset( $layout['wideSize'] ) ? $layout['wideSize'] : '';
$all_max_width_value = $content_size ? $content_size : $wide_size;
$wide_max_width_value = $wide_size ? $wide_size : $content_size;
// Make sure there is a single CSS rule, and all tags are stripped for security.
// TODO: Use `safecss_filter_attr` instead - once https://core.trac.wordpress.org/ticket/46197 is patched.
$all_max_width_value = wp_strip_all_tags( explode( ';', $all_max_width_value )[0] );
$wide_max_width_value = wp_strip_all_tags( explode( ';', $wide_max_width_value )[0] );
$style = '';
if ( $content_size || $wide_size ) {
$style = "$selector > * {";
$style .= 'max-width: ' . esc_html( $all_max_width_value ) . ';';
$style .= 'margin-left: auto !important;';
$style .= 'margin-right: auto !important;';
$style .= '}';
$style .= "$selector > .alignwide { max-width: " . esc_html( $wide_max_width_value ) . ';}';
$style .= "$selector .alignfull { max-width: none; }";
}
$style .= "$selector .alignleft { float: left; margin-right: 2em; }";
$style .= "$selector .alignright { float: right; margin-left: 2em; }";
if ( $has_block_gap_support ) {
$gap_style = $gap_value ? $gap_value : 'var( --wp--style--block-gap )';
$style .= "$selector > * { margin-top: 0; margin-bottom: 0; }";
$style .= "$selector > * + * { margin-top: $gap_style; margin-bottom: 0; }";
}
} elseif ( 'flex' === $layout_type ) {
$layout_orientation = isset( $layout['orientation'] ) ? $layout['orientation'] : 'horizontal';
$justify_content_options = array(
'left' => 'flex-start',
'right' => 'flex-end',
'center' => 'center',
);
if ( 'horizontal' === $layout_orientation ) {
$justify_content_options += array( 'space-between' => 'space-between' );
}
$flex_wrap_options = array( 'wrap', 'nowrap' );
$flex_wrap = ! empty( $layout['flexWrap'] ) && in_array( $layout['flexWrap'], $flex_wrap_options, true ) ?
$layout['flexWrap'] :
'wrap';
$style = "$selector {";
$style .= 'display: flex;';
if ( $has_block_gap_support ) {
$gap_style = $gap_value ? $gap_value : 'var( --wp--style--block-gap, 0.5em )';
$style .= "gap: $gap_style;";
} else {
$style .= 'gap: 0.5em;';
}
$style .= "flex-wrap: $flex_wrap;";
$style .= 'align-items: center;';
if ( 'horizontal' === $layout_orientation ) {
$style .= 'align-items: center;';
/**
* Add this style only if is not empty for backwards compatibility,
* since we intend to convert blocks that had flex layout implemented
* by custom css.
*/
if ( ! empty( $layout['justifyContent'] ) && array_key_exists( $layout['justifyContent'], $justify_content_options ) ) {
$style .= "justify-content: {$justify_content_options[ $layout['justifyContent'] ]};";
}
} else {
$style .= 'flex-direction: column;';
if ( ! empty( $layout['justifyContent'] ) && array_key_exists( $layout['justifyContent'], $justify_content_options ) ) {
$style .= "align-items: {$justify_content_options[ $layout['justifyContent'] ]};";
}
}
$style .= '}';
$style .= "$selector > * { margin: 0; }";
}
return $style;
}
/**
* Renders the layout config to the block wrapper.
*
* @since 5.8.0
* @access private
*
* @param string $block_content Rendered block content.
* @param array $block Block object.
* @return string Filtered block content.
*/
function wp_render_layout_support_flag( $block_content, $block ) {
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
$support_layout = block_has_support( $block_type, array( '__experimentalLayout' ), false );
if ( ! $support_layout ) {
return $block_content;
}
$block_gap = wp_get_global_settings( array( 'spacing', 'blockGap' ) );
$default_layout = wp_get_global_settings( array( 'layout' ) );
$has_block_gap_support = isset( $block_gap ) ? null !== $block_gap : false;
$default_block_layout = _wp_array_get( $block_type->supports, array( '__experimentalLayout', 'default' ), array() );
$used_layout = isset( $block['attrs']['layout'] ) ? $block['attrs']['layout'] : $default_block_layout;
if ( isset( $used_layout['inherit'] ) && $used_layout['inherit'] ) {
if ( ! $default_layout ) {
return $block_content;
}
$used_layout = $default_layout;
}
$class_name = wp_unique_id( 'wp-container-' );
$gap_value = _wp_array_get( $block, array( 'attrs', 'style', 'spacing', 'blockGap' ) );
// Skip if gap value contains unsupported characters.
// Regex for CSS value borrowed from `safecss_filter_attr`, and used here
// because we only want to match against the value, not the CSS attribute.
$gap_value = preg_match( '%[\\\(&=}]|/\*%', $gap_value ) ? null : $gap_value;
$style = wp_get_layout_style( ".$class_name", $used_layout, $has_block_gap_support, $gap_value );
// This assumes the hook only applies to blocks with a single wrapper.
// I think this is a reasonable limitation for that particular hook.
$content = preg_replace(
'/' . preg_quote( 'class="', '/' ) . '/',
'class="' . esc_attr( $class_name ) . ' ',
$block_content,
1
);
wp_enqueue_block_support_styles( $style );
return $content;
}
// Register the block support.
WP_Block_Supports::get_instance()->register(
'layout',
array(
'register_attribute' => 'wp_register_layout_support',
)
);
add_filter( 'render_block', 'wp_render_layout_support_flag', 10, 2 );
/**
* For themes without theme.json file, make sure
* to restore the inner div for the group block
* to avoid breaking styles relying on that div.
*
* @since 5.8.0
* @access private
*
* @param string $block_content Rendered block content.
* @param array $block Block object.
* @return string Filtered block content.
*/
function wp_restore_group_inner_container( $block_content, $block ) {
$tag_name = isset( $block['attrs']['tagName'] ) ? $block['attrs']['tagName'] : 'div';
$group_with_inner_container_regex = sprintf(
'/(^\s*<%1$s\b[^>]*wp-block-group(\s|")[^>]*>)(\s*<div\b[^>]*wp-block-group__inner-container(\s|")[^>]*>)((.|\S|\s)*)/U',
preg_quote( $tag_name, '/' )
);
if (
'core/group' !== $block['blockName'] ||
WP_Theme_JSON_Resolver::theme_has_support() ||
1 === preg_match( $group_with_inner_container_regex, $block_content ) ||
( isset( $block['attrs']['layout']['type'] ) && 'default' !== $block['attrs']['layout']['type'] )
) {
return $block_content;
}
$replace_regex = sprintf(
'/(^\s*<%1$s\b[^>]*wp-block-group[^>]*>)(.*)(<\/%1$s>\s*$)/ms',
preg_quote( $tag_name, '/' )
);
$updated_content = preg_replace_callback(
$replace_regex,
static function( $matches ) {
return $matches[1] . '<div class="wp-block-group__inner-container">' . $matches[2] . '</div>' . $matches[3];
},
$block_content
);
return $updated_content;
}
add_filter( 'render_block', 'wp_restore_group_inner_container', 10, 2 );