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Editing: class-wp-scripts.php
<?php /** * Dependencies API: WP_Scripts class * * @since 2.6.0 * * @package WordPress * @subpackage Dependencies */ /** * Core class used to register scripts. * * @since 2.1.0 * * @see WP_Dependencies */ class WP_Scripts extends WP_Dependencies { /** * Base URL for scripts. * * Full URL with trailing slash. * * @since 2.6.0 * @see wp_default_scripts() * @var string|null */ public $base_url; /** * URL of the content directory. * * @since 2.8.0 * @see wp_default_scripts() * @var string|null */ public $content_url; /** * Default version string for scripts. * * @since 2.6.0 * @see wp_default_scripts() * @var string|null */ public $default_version; /** * Holds handles of scripts which are enqueued in footer. * * @since 2.8.0 * @var string[] */ public $in_footer = array(); /** * Holds a list of script handles which will be concatenated. * * @since 2.8.0 * @var string */ public $concat = ''; /** * Holds a string which contains script handles and their version. * * @since 2.8.0 * @deprecated 3.4.0 * @var string */ public $concat_version = ''; /** * Whether to perform concatenation. * * @since 2.8.0 * @var bool */ public $do_concat = false; /** * Holds HTML markup of scripts and additional data if concatenation * is enabled. * * @since 2.8.0 * @var string */ public $print_html = ''; /** * Holds inline code if concatenation is enabled. * * @since 2.8.0 * @var string */ public $print_code = ''; /** * Holds a list of script handles which are not in the default directory * if concatenation is enabled. * * Unused in core. * * @since 2.8.0 * @var string */ public $ext_handles = ''; /** * Holds a string which contains handles and versions of scripts which * are not in the default directory if concatenation is enabled. * * Unused in core. * * @since 2.8.0 * @var string */ public $ext_version = ''; /** * List of default directories. * * @since 2.8.0 * @see wp_default_scripts() * @var string[]|null */ public $default_dirs; /** * Holds a mapping of dependents (as handles) for a given script handle. * Used to optimize recursive dependency tree checks. * * @since 6.3.0 * @var array<string, string[]> */ private $dependents_map = array(); /** * Holds a reference to the delayed (non-blocking) script loading strategies. * Used by methods that validate loading strategies. * * @since 6.3.0 * @var string[] */ private $delayed_strategies = array( 'defer', 'async' ); /** * Constructor. * * @since 2.6.0 */ public function __construct() { $this->init(); add_action( 'init', array( $this, 'init' ), 0 ); } /** * Initialize the class. * * @since 3.4.0 */ public function init() { /** * Fires when the WP_Scripts instance is initialized. * * @since 2.6.0 * * @param WP_Scripts $wp_scripts WP_Scripts instance (passed by reference). */ do_action_ref_array( 'wp_default_scripts', array( &$this ) ); } /** * Prints scripts. * * Prints the scripts passed to it or the print queue. Also prints all necessary dependencies. * * @since 2.1.0 * @since 2.8.0 Added the `$group` parameter. * * @param string|string[]|false $handles Optional. Scripts to be printed: queue (false), * single script (string), or multiple scripts (array of strings). * Default false. * @param int|false $group Optional. Group level: level (int), no groups (false). * Default false. * @return string[] Handles of scripts that have been printed. */ public function print_scripts( $handles = false, $group = false ) { return $this->do_items( $handles, $group ); } /** * Prints extra scripts of a registered script. * * @since 2.1.0 * @since 2.8.0 Added the `$display` parameter. * @deprecated 3.3.0 * * @see print_extra_script() * * @param string $handle The script's registered handle. * @param bool $display Optional. Whether to print the extra script * instead of just returning it. Default true. * @return bool|string|null Null if no data exists, extra scripts if `$display` is true, * true otherwise. */ public function print_scripts_l10n( $handle, $display = true ) { _deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' ); return $this->print_extra_script( $handle, $display ); } /** * Prints extra scripts of a registered script. * * @since 3.3.0 * * @param string $handle The script's registered handle. * @param bool $display Optional. Whether to print the extra script * instead of just returning it. Default true. * @return bool|string|null Null if no data exists, extra scripts if `$display` is true, * true otherwise. */ public function print_extra_script( $handle, $display = true ) { $output = $this->get_data( $handle, 'data' ); if ( ! $output ) { return null; } /* * Do not print a sourceURL comment if concatenation is enabled. * * Extra scripts may be concatenated into a single script. * The line-based sourceURL comments may break concatenated scripts * and do not make sense when multiple scripts are joined together. */ if ( ! $this->do_concat ) { $output .= sprintf( "\n//# sourceURL=%s", rawurlencode( "{$handle}-js-extra" ) ); } if ( ! $display ) { return $output; } wp_print_inline_script_tag( $output, array( 'id' => "{$handle}-js-extra" ) ); return true; } /** * Checks whether all dependents of a given handle are in the footer. * * If there are no dependents, this is considered the same as if all dependents were in the footer. * * @since 6.4.0 * * @param string $handle Script handle. * @return bool Whether all dependents are in the footer. */ private function are_all_dependents_in_footer( $handle ) { foreach ( $this->get_dependents( $handle ) as $dep ) { if ( isset( $this->groups[ $dep ] ) && 0 === $this->groups[ $dep ] ) { return false; } } return true; } /** * Processes a script dependency. * * @since 2.6.0 * @since 2.8.0 Added the `$group` parameter. * * @see WP_Dependencies::do_item() * * @param string $handle The script's registered handle. * @param int|false $group Optional. Group level: level (int), no groups (false). * Default false. * @return bool True on success, false on failure. */ public function do_item( $handle, $group = false ) { if ( ! parent::do_item( $handle ) ) { return false; } if ( 0 === $group && $this->groups[ $handle ] > 0 ) { $this->in_footer[] = $handle; return false; } if ( false === $group && in_array( $handle, $this->in_footer, true ) ) { $this->in_footer = array_diff( $this->in_footer, (array) $handle ); } $obj = $this->registered[ $handle ]; if ( $obj->extra['conditional'] ?? false ) { return false; } if ( null === $obj->ver ) { $ver = ''; } else { $ver = $obj->ver ? $obj->ver : $this->default_version; } if ( isset( $this->args[ $handle ] ) ) { $ver = $ver ? $ver . '&' . $this->args[ $handle ] : $this->args[ $handle ]; } $src = $obj->src; $strategy = $this->get_eligible_loading_strategy( $handle ); $intended_strategy = (string) $this->get_data( $handle, 'strategy' ); if ( ! $this->is_delayed_strategy( $intended_strategy ) ) { $intended_strategy = ''; } /* * Move this script to the footer if: * 1. The script is in the header group. * 2. The current output is the header. * 3. The intended strategy is delayed. * 4. The actual strategy is not delayed. * 5. All dependent scripts are in the footer. */ if ( 0 === $group && 0 === $this->groups[ $handle ] && $intended_strategy && ! $this->is_delayed_strategy( $strategy ) && $this->are_all_dependents_in_footer( $handle ) ) { $this->in_footer[] = $handle; return false; } $before_script = $this->get_inline_script_tag( $handle, 'before' ); $after_script = $this->get_inline_script_tag( $handle, 'after' ); if ( $before_script || $after_script ) { $inline_script_tag = $before_script . $after_script; } else { $inline_script_tag = ''; } /* * Prevent concatenation of scripts if the text domain is defined * to ensure the dependency order is respected. */ $translations_stop_concat = ! empty( $obj->textdomain ); $translations = $this->print_translations( $handle, false ); if ( $translations ) { /* * The sourceURL comment is not included by WP_Scripts::print_translations() * when `$display` is `false` to prevent issues where the script tag contents are used * by extenders for other purposes, for example concatenated with other script content. * * Include the sourceURL comment here as it would be when printed directly. */ $source_url = rawurlencode( "{$handle}-js-translations" ); $translations .= "\n//# sourceURL={$source_url}"; $translations = wp_get_inline_script_tag( $translations, array( 'id' => "{$handle}-js-translations" ) ); } if ( $this->do_concat ) { /** * Filters the script loader source. * * @since 2.2.0 * * @param string $src Script loader source path. * @param string $handle Script handle. */ $filtered_src = apply_filters( 'script_loader_src', $src, $handle ); if ( is_string( $filtered_src ) && $this->in_default_dir( $filtered_src ) && ( $before_script || $after_script || $translations_stop_concat || $this->is_delayed_strategy( $strategy ) ) ) { $this->do_concat = false; // Have to print the so-far concatenated scripts right away to maintain the right order. _print_scripts(); $this->reset(); } elseif ( $this->in_default_dir( $filtered_src ) ) { $this->print_code .= $this->print_extra_script( $handle, false ); $this->concat .= "$handle,"; $this->concat_version .= "$handle$ver"; return true; } else { $this->ext_handles .= "$handle,"; $this->ext_version .= "$handle$ver"; } } $this->print_extra_script( $handle ); // A single item may alias a set of items, by having dependencies, but no source. if ( ! $src ) { if ( $inline_script_tag ) { if ( $this->do_concat ) { $this->print_html .= $inline_script_tag; } else { echo $inline_script_tag; } } return true; } if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && str_starts_with( $src, $this->content_url ) ) ) { $src = $this->base_url . $src; } $ver_to_add = ''; if ( empty( $obj->ver ) && null !== $obj->ver && is_string( $this->default_version ) ) { $ver_to_add = $this->default_version; } elseif ( is_scalar( $obj->ver ) ) { $ver_to_add = (string) $obj->ver; } $added_args = (string) ( $this->args[ $handle ] ?? '' ); if ( '' !== $ver_to_add || '' !== $added_args ) { $fragment = strstr( $src, '#' ); if ( false !== $fragment ) { $src = substr( $src, 0, -strlen( $fragment ) ); } if ( '' !== $ver_to_add ) { $src .= ( str_contains( $src, '?' ) ? '&' : '?' ) . 'ver=' . rawurlencode( $ver_to_add ); } if ( '' !== $added_args ) { $src .= ( str_contains( $src, '?' ) ? '&' : '?' ) . $added_args; } if ( false !== $fragment ) { $src .= $fragment; } } /** This filter is documented in wp-includes/class-wp-scripts.php */ $src = esc_url_raw( apply_filters( 'script_loader_src', $src, $handle ) ); if ( ! $src ) { return true; } $attr = array( 'src' => $src, 'id' => "{$handle}-js", ); if ( $strategy ) { $attr[ $strategy ] = true; } if ( $intended_strategy ) { $attr['data-wp-strategy'] = $intended_strategy; } // Determine fetchpriority. $original_fetchpriority = $obj->extra['fetchpriority'] ?? null; if ( null === $original_fetchpriority || ! $this->is_valid_fetchpriority( $original_fetchpriority ) ) { $original_fetchpriority = 'auto'; } $actual_fetchpriority = $this->get_highest_fetchpriority_with_dependents( $handle ); if ( null === $actual_fetchpriority ) { // If null, it's likely this script was not explicitly enqueued, so in this case use the original priority. $actual_fetchpriority = $original_fetchpriority; } if ( is_string( $actual_fetchpriority ) && 'auto' !== $actual_fetchpriority ) { $attr['fetchpriority'] = $actual_fetchpriority; } if ( $original_fetchpriority !== $actual_fetchpriority ) { $attr['data-wp-fetchpriority'] = $original_fetchpriority; } $tag = $translations . $before_script; $tag .= wp_get_script_tag( $attr ); $tag .= $after_script; /** * Filters the HTML script tag of an enqueued script. * * @since 4.1.0 * * @param string $tag The `<script>` tag for the enqueued script. * @param string $handle The script's registered handle. * @param string $src The script's source URL. */ $tag = apply_filters( 'script_loader_tag', $tag, $handle, $src ); if ( $this->do_concat ) { $this->print_html .= $tag; } else { echo $tag; } return true; } /** * Adds extra code to a registered script. * * @since 4.5.0 * * @param string $handle Name of the script to add the inline script to. * Must be lowercase. * @param string $data String containing the JavaScript to be added. * @param string $position Optional. Whether to add the inline script * before the handle or after. Default 'after'. * @return bool True on success, false on failure. */ public function add_inline_script( $handle, $data, $position = 'after' ) { if ( ! $data ) { return false; } if ( 'after' !== $position ) { $position = 'before'; } $script = (array) $this->get_data( $handle, $position ); $script[] = $data; return $this->add_data( $handle, $position, $script ); } /** * Prints inline scripts registered for a specific handle. * * @since 4.5.0 * @deprecated 6.3.0 Use methods get_inline_script_tag() or get_inline_script_data() instead. * * @param string $handle Name of the script to print inline scripts for. * Must be lowercase. * @param string $position Optional. Whether to add the inline script * before the handle or after. Default 'after'. * @param bool $display Optional. Whether to print the script tag * instead of just returning the script data. Default true. * @return string|false Script data on success, false otherwise. */ public function print_inline_script( $handle, $position = 'after', $display = true ) { _deprecated_function( __METHOD__, '6.3.0', 'WP_Scripts::get_inline_script_data() or WP_Scripts::get_inline_script_tag()' ); $output = $this->get_inline_script_data( $handle, $position ); if ( empty( $output ) ) { return false; } if ( $display ) { echo $this->get_inline_script_tag( $handle, $position ); } return $output; } /** * Gets data for inline scripts registered for a specific handle. * * @since 6.3.0 * * @param string $handle Name of the script to get data for. * Must be lowercase. * @param string $position Optional. Whether to add the inline script * before the handle or after. Default 'after'. * @return string Inline script, which may be empty string. */ public function get_inline_script_data( $handle, $position = 'after' ) { $data = $this->get_data( $handle, $position ); if ( empty( $data ) || ! is_array( $data ) ) { return ''; } /* * Print sourceURL comment regardless of concatenation. * * Inline scripts prevent scripts from being concatenated, so * sourceURL comments are safe to print for inline scripts. */ $data[] = sprintf( '//# sourceURL=%s', rawurlencode( "{$handle}-js-{$position}" ) ); return trim( implode( "\n", $data ), "\n" ); } /** * Gets tags for inline scripts registered for a specific handle. * * @since 6.3.0 * * @param string $handle Name of the script to get associated inline script tag for. * Must be lowercase. * @param string $position Optional. Whether to get tag for inline * scripts in the before or after position. Default 'after'. * @return string Inline script, which may be empty string. */ public function get_inline_script_tag( $handle, $position = 'after' ) { $js = $this->get_inline_script_data( $handle, $position ); if ( empty( $js ) ) { return ''; } $id = "{$handle}-js-{$position}"; return wp_get_inline_script_tag( $js, compact( 'id' ) ); } /** * Localizes a script, only if the script has already been added. * * @since 2.1.0 * * @param string $handle Name of the script to attach data to. * @param string $object_name Name of the variable that will contain the data. * @param array<string, mixed> $l10n Array of data to localize. * @return bool True on success, false on failure. */ public function localize( $handle, $object_name, $l10n ) { if ( 'jquery' === $handle ) { $handle = 'jquery-core'; } if ( is_array( $l10n ) && isset( $l10n['l10n_print_after'] ) ) { // back compat, preserve the code in 'l10n_print_after' if present. $after = $l10n['l10n_print_after']; unset( $l10n['l10n_print_after'] ); } if ( ! is_array( $l10n ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: $l10n, 2: wp_add_inline_script() */ __( 'The %1$s parameter must be an array. To pass arbitrary data to scripts, use the %2$s function instead.' ), '<code>$l10n</code>', '<code>wp_add_inline_script()</code>' ), '5.7.0' ); if ( false === $l10n ) { // This should really not be needed, but is necessary for backward compatibility. $l10n = array( $l10n ); } } if ( is_string( $l10n ) ) { $l10n = html_entity_decode( $l10n, ENT_QUOTES, 'UTF-8' ); } elseif ( is_array( $l10n ) ) { foreach ( $l10n as $key => $value ) { if ( ! is_scalar( $value ) ) { continue; } $l10n[ $key ] = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8' ); } } $script = "var $object_name = " . wp_json_encode( $l10n, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES ) . ';'; if ( ! empty( $after ) ) { $script .= "\n$after;"; } $data = $this->get_data( $handle, 'data' ); if ( ! empty( $data ) ) { $script = "$data\n$script"; } return $this->add_data( $handle, 'data', $script ); } /** * Sets handle group. * * @since 2.8.0 * * @see WP_Dependencies::set_group() * * @param string $handle Name of the item. Should be unique. * @param bool $recursion Internal flag that calling function was called recursively. * @param int|false $group Optional. Group level: level (int), no groups (false). * Default false. * @return bool Not already in the group or a lower group. */ public function set_group( $handle, $recursion, $group = false ) { if ( isset( $this->registered[ $handle ]->args ) && 1 === $this->registered[ $handle ]->args ) { $calculated_group = 1; } else { $calculated_group = (int) $this->get_data( $handle, 'group' ); } if ( false !== $group && $calculated_group > $group ) { $calculated_group = $group; } return parent::set_group( $handle, $recursion, $calculated_group ); } /** * Sets a translation textdomain. * * @since 5.0.0 * @since 5.1.0 The `$domain` parameter was made optional. * * @param string $handle Name of the script to register a translation domain to. * @param string $domain Optional. Text domain. Default 'default'. * @param string $path Optional. The full file path to the directory containing translation files. * @return bool True if the text domain was registered, false if not. */ public function set_translations( $handle, $domain = 'default', $path = '' ) { if ( ! isset( $this->registered[ $handle ] ) ) { return false; } /** @var \_WP_Dependency $obj */ $obj = $this->registered[ $handle ]; if ( ! in_array( 'wp-i18n', $obj->deps, true ) ) { $obj->deps[] = 'wp-i18n'; } return $obj->set_translations( $domain, $path ); } /** * Prints translations set for a specific handle. * * @since 5.0.0 * * @param string $handle Name of the script to add the inline script to. * Must be lowercase. * @param bool $display Optional. Whether to print the script * instead of just returning it. Default true. * @return string|false Script on success, false otherwise. */ public function print_translations( $handle, $display = true ) { if ( ! isset( $this->registered[ $handle ] ) || empty( $this->registered[ $handle ]->textdomain ) ) { return false; } $domain = $this->registered[ $handle ]->textdomain; $path = ''; if ( isset( $this->registered[ $handle ]->translations_path ) ) { $path = $this->registered[ $handle ]->translations_path; } $json_translations = load_script_textdomain( $handle, $domain, $path ); if ( ! $json_translations ) { return false; } $output = <<<JS ( function( domain, translations ) { var localeData = translations.locale_data[ domain ] || translations.locale_data.messages; localeData[""].domain = domain; wp.i18n.setLocaleData( localeData, domain ); } )( "{$domain}", {$json_translations} ); JS; if ( $display ) { $source_url = rawurlencode( "{$handle}-js-translations" ); $output .= "\n//# sourceURL={$source_url}"; wp_print_inline_script_tag( $output, array( 'id' => "{$handle}-js-translations" ) ); } return $output; } /** * Determines script dependencies. * * @since 2.1.0 * * @see WP_Dependencies::all_deps() * * @param string|string[] $handles Item handle (string) or item handles (array of strings). * @param bool $recursion Optional. Internal flag that function is calling itself. * Default false. * @param int|false $group Optional. Group level: level (int), no groups (false). * Default false. * @return bool True on success, false on failure. */ public function all_deps( $handles, $recursion = false, $group = false ) { $result = parent::all_deps( $handles, $recursion, $group ); if ( ! $recursion ) { /** * Filters the list of script dependencies left to print. * * @since 2.3.0 * * @param string[] $to_do An array of script dependency handles. */ $this->to_do = apply_filters( 'print_scripts_array', $this->to_do ); } return $result; } /** * Processes items and dependencies for the head group. * * @since 2.8.0 * * @see WP_Dependencies::do_items() * * @return string[] Handles of items that have been processed. */ public function do_head_items() { $this->do_items( false, 0 ); return $this->done; } /** * Processes items and dependencies for the footer group. * * @since 2.8.0 * * @see WP_Dependencies::do_items() * * @return string[] Handles of items that have been processed. */ public function do_footer_items() { $this->do_items( false, 1 ); return $this->done; } /** * Whether a handle's source is in a default directory. * * @since 2.8.0 * * @param string $src The source of the enqueued script. * @return bool True if found, false if not. */ public function in_default_dir( $src ) { if ( ! $this->default_dirs ) { return true; } if ( str_starts_with( $src, '/' . WPINC . '/js/l10n' ) ) { return false; } return array_any( (array) $this->default_dirs, fn( $test ) => str_starts_with( $src, $test ) ); } /** * This overrides the add_data method from WP_Dependencies, to support normalizing of $args. * * @since 6.3.0 * * @param string $handle Name of the item. Should be unique. * @param string $key The data key. * @param mixed $value The data value. * @return bool True on success, false on failure. */ public function add_data( $handle, $key, $value ) { if ( ! isset( $this->registered[ $handle ] ) ) { return false; } if ( 'conditional' === $key ) { // If a dependency is declared by a conditional script, remove it. $this->registered[ $handle ]->deps = array(); } if ( 'strategy' === $key ) { if ( ! empty( $value ) && ! $this->is_delayed_strategy( $value ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: $strategy, 2: $handle */ __( 'Invalid strategy `%1$s` defined for `%2$s` during script registration.' ), is_string( $value ) ? $value : gettype( $value ), $handle ), '6.3.0' ); return false; } elseif ( ! $this->registered[ $handle ]->src && $this->is_delayed_strategy( $value ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: $strategy, 2: $handle */ __( 'Cannot supply a strategy `%1$s` for script `%2$s` because it is an alias (it lacks a `src` value).' ), is_string( $value ) ? $value : gettype( $value ), $handle ), '6.3.0' ); return false; } } elseif ( 'fetchpriority' === $key ) { if ( empty( $value ) ) { $value = 'auto'; } if ( ! $this->is_valid_fetchpriority( $value ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: $fetchpriority, 2: $handle */ __( 'Invalid fetchpriority `%1$s` defined for `%2$s` during script registration.' ), is_string( $value ) ? $value : gettype( $value ), $handle ), '6.9.0' ); return false; } elseif ( ! $this->registered[ $handle ]->src ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: $fetchpriority, 2: $handle */ __( 'Cannot supply a fetchpriority `%1$s` for script `%2$s` because it is an alias (it lacks a `src` value).' ), is_string( $value ) ? $value : gettype( $value ), $handle ), '6.9.0' ); return false; } } elseif ( 'module_dependencies' === $key ) { if ( ! is_array( $value ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: 'module_dependencies', 2: Script handle. */ __( 'The value for "%1$s" must be an array for the "%2$s" script.' ), 'module_dependencies', $handle ), '7.0.0' ); return false; } $sanitized_value = array(); $has_invalid_ids = false; foreach ( $value as $module ) { if ( is_string( $module ) || ( is_array( $module ) && isset( $module['id'] ) && is_string( $module['id'] ) ) ) { $sanitized_value[] = $module; } else { $has_invalid_ids = true; } } if ( $has_invalid_ids ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: Script handle, 2: 'module_dependencies' */ __( 'The script handle "%1$s" has one or more of its script module dependencies ("%2$s") which are invalid.' ), $handle, 'module_dependencies' ), '7.0.0' ); } $value = $sanitized_value; } return parent::add_data( $handle, $key, $value ); } /** * Gets all dependents of a script. * * This is not recursive. * * @since 6.3.0 * * @param string $handle The script handle. * @return string[] Script handles. */ private function get_dependents( $handle ) { // Check if dependents map for the handle in question is present. If so, use it. if ( isset( $this->dependents_map[ $handle ] ) ) { return $this->dependents_map[ $handle ]; } $dependents = array(); // Iterate over all registered scripts, finding dependents of the script passed to this method. foreach ( $this->registered as $registered_handle => $args ) { if ( in_array( $handle, $args->deps, true ) ) { $dependents[] = $registered_handle; } } // Add the handles dependents to the map to ease future lookups. $this->dependents_map[ $handle ] = $dependents; return $dependents; } /** * Checks if the strategy passed is a valid delayed (non-blocking) strategy. * * @since 6.3.0 * * @param string|mixed $strategy The strategy to check. * @return bool True if $strategy is one of the delayed strategies, otherwise false. */ private function is_delayed_strategy( $strategy ): bool { return in_array( $strategy, $this->delayed_strategies, true ); } /** * Checks if the provided fetchpriority is valid. * * @since 6.9.0 * * @param string|mixed $priority Fetch priority. * @return bool Whether valid fetchpriority. */ private function is_valid_fetchpriority( $priority ): bool { return in_array( $priority, array( 'auto', 'low', 'high' ), true ); } /** * Gets the best eligible loading strategy for a script. * * @since 6.3.0 * * @param string $handle The script handle. * @return string The best eligible loading strategy. */ private function get_eligible_loading_strategy( $handle ) { $intended_strategy = (string) $this->get_data( $handle, 'strategy' ); // Bail early if there is no intended strategy. if ( ! $intended_strategy ) { return ''; } /* * If the intended strategy is 'defer', limit the initial list of eligible * strategies, since 'async' can fallback to 'defer', but not vice-versa. */ $initial_strategy = ( 'defer' === $intended_strategy ) ? array( 'defer' ) : null; $eligible_strategies = $this->filter_eligible_strategies( $handle, $initial_strategy ); // Return early once we know the eligible strategy is blocking. if ( empty( $eligible_strategies ) ) { return ''; } return in_array( 'async', $eligible_strategies, true ) ? 'async' : 'defer'; } /** * Filter the list of eligible loading strategies for a script. * * @since 6.3.0 * * @param string $handle The script handle. * @param string[]|null $eligible_strategies Optional. The list of strategies to filter. Default null. * @param array<string, true> $checked Optional. An array of already checked script handles, used to avoid recursive loops. * @param array<string, string[]> $stored_results Optional. An array of already computed eligible loading strategies by handle, used to increase performance in large dependency lists. * @return string[] A list of eligible loading strategies that could be used. */ private function filter_eligible_strategies( $handle, $eligible_strategies = null, $checked = array(), array &$stored_results = array() ) { if ( isset( $stored_results[ $handle ] ) ) { return $stored_results[ $handle ]; } // If no strategies are being passed, all strategies are eligible. if ( null === $eligible_strategies ) { $eligible_strategies = $this->delayed_strategies; } // If this handle was already checked, return early. if ( isset( $checked[ $handle ] ) ) { return $eligible_strategies; } // Mark this handle as checked. $checked[ $handle ] = true; // If this handle isn't registered, don't filter anything and return. if ( ! isset( $this->registered[ $handle ] ) ) { return $eligible_strategies; } // If the handle is not enqueued, don't filter anything and return. if ( ! $this->query( $handle, 'enqueued' ) ) { return $eligible_strategies; } $is_alias = (bool) ! $this->registered[ $handle ]->src; $intended_strategy = $this->get_data( $handle, 'strategy' ); // For non-alias handles, an empty intended strategy filters all strategies. if ( ! $is_alias && empty( $intended_strategy ) ) { return array(); } // Handles with inline scripts attached in the 'after' position cannot be delayed. if ( $this->has_inline_script( $handle, 'after' ) ) { return array(); } // If the intended strategy is 'defer', filter out 'async'. if ( 'defer' === $intended_strategy ) { $eligible_strategies = array( 'defer' ); } $dependents = $this->get_dependents( $handle ); // Recursively filter eligible strategies for dependents. foreach ( $dependents as $dependent ) { // Bail early once we know the eligible strategy is blocking. if ( empty( $eligible_strategies ) ) { return array(); } $eligible_strategies = $this->filter_eligible_strategies( $dependent, $eligible_strategies, $checked, $stored_results ); } $stored_results[ $handle ] = $eligible_strategies; return $eligible_strategies; } /** * Gets the highest fetch priority for a given script and all of its dependent scripts. * * @since 6.9.0 * @see self::filter_eligible_strategies() * @see WP_Script_Modules::get_highest_fetchpriority() * * @param string $handle Script module ID. * @param array<string, true> $checked Optional. An array of already checked script handles, used to avoid recursive loops. * @param array<string, string> $stored_results Optional. An array of already computed max priority by handle, used to increase performance in large dependency lists. * @return string|null Highest fetch priority for the script and its dependents. */ private function get_highest_fetchpriority_with_dependents( string $handle, array $checked = array(), array &$stored_results = array() ): ?string { if ( isset( $stored_results[ $handle ] ) ) { return $stored_results[ $handle ]; } // If there is a recursive dependency, return early. if ( isset( $checked[ $handle ] ) ) { return null; } // Mark this handle as checked to guard against infinite recursion. $checked[ $handle ] = true; // Abort if the script is not enqueued or a dependency of an enqueued script. if ( ! $this->query( $handle, 'enqueued' ) ) { return null; } $fetchpriority = $this->get_data( $handle, 'fetchpriority' ); if ( ! $this->is_valid_fetchpriority( $fetchpriority ) ) { $fetchpriority = 'auto'; } static $priorities = array( 'low', 'auto', 'high', ); $high_priority_index = count( $priorities ) - 1; $highest_priority_index = (int) array_search( $fetchpriority, $priorities, true ); if ( $highest_priority_index !== $high_priority_index ) { foreach ( $this->get_dependents( $handle ) as $dependent_handle ) { $dependent_priority = $this->get_highest_fetchpriority_with_dependents( $dependent_handle, $checked, $stored_results ); if ( is_string( $dependent_priority ) ) { $highest_priority_index = max( $highest_priority_index, (int) array_search( $dependent_priority, $priorities, true ) ); if ( $highest_priority_index === $high_priority_index ) { break; } } } } $stored_results[ $handle ] = $priorities[ $highest_priority_index ]; return $priorities[ $highest_priority_index ]; } /** * Gets data for inline scripts registered for a specific handle. * * @since 6.3.0 * * @param string $handle Name of the script to get data for. Must be lowercase. * @param string $position The position of the inline script. * @return bool Whether the handle has an inline script (either before or after). */ private function has_inline_script( $handle, $position = null ) { if ( $position && in_array( $position, array( 'before', 'after' ), true ) ) { return (bool) $this->get_data( $handle, $position ); } return (bool) ( $this->get_data( $handle, 'before' ) || $this->get_data( $handle, 'after' ) ); } /** * Resets class properties. * * @since 2.8.0 */ public function reset() { $this->do_concat = false; $this->print_code = ''; $this->concat = ''; $this->concat_version = ''; $this->print_html = ''; $this->ext_version = ''; $this->ext_handles = ''; } /** * Gets a script-specific dependency warning message. * * @since 6.9.1 * * @param string $handle Script handle with missing dependencies. * @param string[] $missing_dependency_handles Missing dependency handles. * @return string Formatted, localized warning message. */ protected function get_dependency_warning_message( $handle, $missing_dependency_handles ) { return sprintf( /* translators: 1: Script handle, 2: List of missing dependency handles. */ __( 'The script with the handle "%1$s" was enqueued with dependencies that are not registered: %2$s.' ), $handle, implode( wp_get_list_item_separator(), $missing_dependency_handles ) ); } }
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