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blocks.php
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blocks.php
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<?php
/**
* Functions related to editor blocks for the Gutenberg editor plugin.
*
* @package gutenberg
*/
if ( ! defined( 'ABSPATH' ) ) {
die( 'Silence is golden.' );
}
if ( ! function_exists( 'register_block_type' ) ) {
/**
* Registers a block type.
*
* @since 0.1.0
* @since 0.6.0 Now also accepts a WP_Block_Type instance as first parameter.
*
* @param string|WP_Block_Type $name Block type name including namespace, or alternatively a
* complete WP_Block_Type instance. In case a WP_Block_Type
* is provided, the $args parameter will be ignored.
* @param array $args {
* Optional. Array of block type arguments. Any arguments may be defined, however the
* ones described below are supported by default. Default empty array.
*
* @type callable $render_callback Callback used to render blocks of this block type.
* }
* @return WP_Block_Type|false The registered block type on success, or false on failure.
*/
function register_block_type( $name, $args = array() ) {
return WP_Block_Type_Registry::get_instance()->register( $name, $args );
}
}
if ( ! function_exists( 'unregister_block_type' ) ) {
/**
* Unregisters a block type.
*
* @since 0.1.0
* @since 0.6.0 Now also accepts a WP_Block_Type instance as first parameter.
*
* @param string|WP_Block_Type $name Block type name including namespace, or alternatively a
* complete WP_Block_Type instance.
* @return WP_Block_Type|false The unregistered block type on success, or false on failure.
*/
function unregister_block_type( $name ) {
return WP_Block_Type_Registry::get_instance()->unregister( $name );
}
}
if ( ! function_exists( 'gutenberg_parse_blocks' ) ) {
/**
* Parses blocks out of a content string.
*
* @since 0.5.0
*
* @param string $content Post content.
* @return array Array of parsed block objects.
*/
function gutenberg_parse_blocks( $content ) {
/**
* Filter to allow plugins to replace the server-side block parser
*
* @since 3.8.0
*
* @param string $parser_class Name of block parser class
*/
$parser_class = apply_filters( 'block_parser_class', 'WP_Block_Parser' );
// Load default block parser for server-side parsing if the default parser class is being used.
if ( 'WP_Block_Parser' === $parser_class ) {
require_once dirname( __FILE__ ) . '/../packages/block-serialization-default-parser/parser.php';
}
$parser = new $parser_class();
return $parser->parse( $content );
}
}
if ( ! function_exists( 'get_dynamic_block_names' ) ) {
/**
* Returns an array of the names of all registered dynamic block types.
*
* @return array Array of dynamic block names.
*/
function get_dynamic_block_names() {
$dynamic_block_names = array();
$block_types = WP_Block_Type_Registry::get_instance()->get_all_registered();
foreach ( $block_types as $block_type ) {
if ( $block_type->is_dynamic() ) {
$dynamic_block_names[] = $block_type->name;
}
}
return $dynamic_block_names;
}
}
if ( ! function_exists( 'get_dynamic_blocks_regex' ) ) {
/**
* Retrieve the dynamic blocks regular expression for searching.
*
* @since 3.6.0
*
* @return string
*/
function get_dynamic_blocks_regex() {
$dynamic_block_names = get_dynamic_block_names();
$dynamic_block_pattern = (
'/<!--\s+wp:(' .
str_replace(
'/',
'\/', // Escape namespace, not handled by preg_quote.
str_replace(
'core/',
'(?:core/)?', // Allow implicit core namespace, but don't capture.
implode(
'|', // Join block names into capture group alternation.
array_map(
'preg_quote', // Escape block name for regular expression.
$dynamic_block_names
)
)
)
) .
')(\s+(\{.*?\}))?\s+(\/)?-->/'
);
return $dynamic_block_pattern;
}
}
/**
* Renders a single block into a HTML string.
*
* @since 1.9.0
* @since 4.4.0 renders full nested tree of blocks before reassembling into HTML string
* @global WP_Post $post The post to edit.
*
* @param array $block A single parsed block object.
* @return string String of rendered HTML.
*/
function gutenberg_render_block( $block ) {
global $post;
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
$is_dynamic = $block['blockName'] && null !== $block_type && $block_type->is_dynamic();
$inner_content = '';
$index = 0;
foreach ( $block['innerContent'] as $chunk ) {
$inner_content .= is_string( $chunk ) ? $chunk : gutenberg_render_block( $block['innerBlocks'][ $index++ ] );
}
if ( $is_dynamic ) {
$attributes = is_array( $block['attrs'] ) ? (array) $block['attrs'] : array();
$global_post = $post;
$output = $block_type->render( $attributes, $inner_content );
$post = $global_post;
return $output;
}
return $inner_content;
}
if ( ! function_exists( 'do_blocks' ) ) {
/**
* Parses dynamic blocks out of `post_content` and re-renders them.
*
* @since 0.1.0
* @since 4.4.0 performs full parse on input post content
*
* @param string $content Post content.
* @return string Updated post content.
*/
function do_blocks( $content ) {
$blocks = gutenberg_parse_blocks( $content );
$output = '';
foreach ( $blocks as $block ) {
$output .= gutenberg_render_block( $block );
}
return $output;
}
add_filter( 'the_content', 'do_blocks', 7 ); // BEFORE do_shortcode() and oembed.
}
if ( ! function_exists( 'strip_dynamic_blocks' ) ) {
/**
* Remove all dynamic blocks from the given content.
*
* @since 3.6.0
*
* @param string $content Content of the current post.
* @return string
*/
function strip_dynamic_blocks( $content ) {
return preg_replace( get_dynamic_blocks_regex(), '', $content );
}
}
if ( ! function_exists( 'strip_dynamic_blocks_add_filter' ) ) {
/**
* Adds the content filter to strip dynamic blocks from excerpts.
*
* It's a bit hacky for now, but once this gets merged into core the function
* can just be called in `wp_trim_excerpt()`.
*
* @since 3.6.0
*
* @param string $text Excerpt.
* @return string
*/
function strip_dynamic_blocks_add_filter( $text ) {
add_filter( 'the_content', 'strip_dynamic_blocks', 6 );
return $text;
}
add_filter( 'get_the_excerpt', 'strip_dynamic_blocks_add_filter', 9 ); // Before wp_trim_excerpt().
}
if ( ! function_exists( 'strip_dynamic_blocks_remove_filter' ) ) {
/**
* Removes the content filter to strip dynamic blocks from excerpts.
*
* It's a bit hacky for now, but once this gets merged into core the function
* can just be called in `wp_trim_excerpt()`.
*
* @since 3.6.0
*
* @param string $text Excerpt.
* @return string
*/
function strip_dynamic_blocks_remove_filter( $text ) {
remove_filter( 'the_content', 'strip_dynamic_blocks', 6 );
return $text;
}
add_filter( 'wp_trim_excerpt', 'strip_dynamic_blocks_remove_filter', 0 ); // Before all other.
}