1014 lines
27 KiB
PHP
1014 lines
27 KiB
PHP
<?php
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/**
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* Dependencies API: WP_Scripts class
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*
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* @since 2.6.0
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*
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* @package WordPress
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* @subpackage Dependencies
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*/
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/**
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* Core class used to register scripts.
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*
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* @since 2.1.0
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*
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* @see WP_Dependencies
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*/
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class WP_Scripts extends WP_Dependencies {
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/**
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* Base URL for scripts.
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*
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* Full URL with trailing slash.
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*
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* @since 2.6.0
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* @var string
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*/
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public $base_url;
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/**
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* URL of the content directory.
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*
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* @since 2.8.0
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* @var string
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*/
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public $content_url;
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/**
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* Default version string for scripts.
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*
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* @since 2.6.0
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* @var string
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*/
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public $default_version;
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/**
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* Holds handles of scripts which are enqueued in footer.
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*
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* @since 2.8.0
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* @var array
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*/
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public $in_footer = array();
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/**
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* Holds a list of script handles which will be concatenated.
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*
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* @since 2.8.0
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* @var string
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*/
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public $concat = '';
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/**
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* Holds a string which contains script handles and their version.
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*
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* @since 2.8.0
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* @deprecated 3.4.0
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* @var string
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*/
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public $concat_version = '';
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/**
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* Whether to perform concatenation.
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*
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* @since 2.8.0
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* @var bool
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*/
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public $do_concat = false;
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/**
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* Holds HTML markup of scripts and additional data if concatenation
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* is enabled.
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*
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* @since 2.8.0
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* @var string
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*/
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public $print_html = '';
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/**
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* Holds inline code if concatenation is enabled.
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*
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* @since 2.8.0
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* @var string
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*/
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public $print_code = '';
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/**
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* Holds a list of script handles which are not in the default directory
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* if concatenation is enabled.
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*
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* Unused in core.
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*
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* @since 2.8.0
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* @var string
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*/
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public $ext_handles = '';
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/**
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* Holds a string which contains handles and versions of scripts which
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* are not in the default directory if concatenation is enabled.
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*
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* Unused in core.
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*
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* @since 2.8.0
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* @var string
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*/
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public $ext_version = '';
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/**
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* List of default directories.
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*
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* @since 2.8.0
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* @var array
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*/
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public $default_dirs;
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/**
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* Holds a mapping of dependents (as handles) for a given script handle.
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* Used to optimize recursive dependency tree checks.
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*
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* @since 6.3.0
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* @var array
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*/
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private $dependents_map = array();
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/**
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* Holds a reference to the delayed (non-blocking) script loading strategies.
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* Used by methods that validate loading strategies.
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*
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* @since 6.3.0
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* @var string[]
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*/
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private $delayed_strategies = array( 'defer', 'async' );
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/**
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* Constructor.
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*
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* @since 2.6.0
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*/
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public function __construct() {
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$this->init();
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add_action( 'init', array( $this, 'init' ), 0 );
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}
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/**
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* Initialize the class.
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*
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* @since 3.4.0
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*/
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public function init() {
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/**
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* Fires when the WP_Scripts instance is initialized.
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*
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* @since 2.6.0
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*
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* @param WP_Scripts $wp_scripts WP_Scripts instance (passed by reference).
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*/
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do_action_ref_array( 'wp_default_scripts', array( &$this ) );
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}
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/**
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* Prints scripts.
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*
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* Prints the scripts passed to it or the print queue. Also prints all necessary dependencies.
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*
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* @since 2.1.0
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* @since 2.8.0 Added the `$group` parameter.
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*
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* @param string|string[]|false $handles Optional. Scripts to be printed: queue (false),
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* single script (string), or multiple scripts (array of strings).
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* Default false.
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* @param int|false $group Optional. Group level: level (int), no groups (false).
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* Default false.
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* @return string[] Handles of scripts that have been printed.
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*/
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public function print_scripts( $handles = false, $group = false ) {
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return $this->do_items( $handles, $group );
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}
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/**
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* Prints extra scripts of a registered script.
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*
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* @since 2.1.0
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* @since 2.8.0 Added the `$display` parameter.
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* @deprecated 3.3.0
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*
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* @see print_extra_script()
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*
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* @param string $handle The script's registered handle.
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* @param bool $display Optional. Whether to print the extra script
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* instead of just returning it. Default true.
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* @return bool|string|void Void if no data exists, extra scripts if `$display` is true,
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* true otherwise.
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*/
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public function print_scripts_l10n( $handle, $display = true ) {
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_deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' );
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return $this->print_extra_script( $handle, $display );
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}
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/**
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* Prints extra scripts of a registered script.
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*
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* @since 3.3.0
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*
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* @param string $handle The script's registered handle.
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* @param bool $display Optional. Whether to print the extra script
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* instead of just returning it. Default true.
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* @return bool|string|void Void if no data exists, extra scripts if `$display` is true,
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* true otherwise.
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*/
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public function print_extra_script( $handle, $display = true ) {
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$output = $this->get_data( $handle, 'data' );
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if ( ! $output ) {
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return;
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}
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if ( ! $display ) {
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return $output;
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}
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wp_print_inline_script_tag( $output, array( 'id' => "{$handle}-js-extra" ) );
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return true;
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}
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/**
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* Checks whether all dependents of a given handle are in the footer.
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*
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* If there are no dependents, this is considered the same as if all dependents were in the footer.
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*
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* @since 6.4.0
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*
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* @param string $handle Script handle.
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* @return bool Whether all dependents are in the footer.
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*/
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private function are_all_dependents_in_footer( $handle ) {
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foreach ( $this->get_dependents( $handle ) as $dep ) {
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if ( isset( $this->groups[ $dep ] ) && 0 === $this->groups[ $dep ] ) {
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return false;
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}
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}
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return true;
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}
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/**
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* Processes a script dependency.
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*
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* @since 2.6.0
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* @since 2.8.0 Added the `$group` parameter.
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*
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* @see WP_Dependencies::do_item()
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*
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* @param string $handle The script's registered handle.
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* @param int|false $group Optional. Group level: level (int), no groups (false).
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* Default false.
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* @return bool True on success, false on failure.
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*/
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public function do_item( $handle, $group = false ) {
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if ( ! parent::do_item( $handle ) ) {
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return false;
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}
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if ( 0 === $group && $this->groups[ $handle ] > 0 ) {
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$this->in_footer[] = $handle;
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return false;
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}
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if ( false === $group && in_array( $handle, $this->in_footer, true ) ) {
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$this->in_footer = array_diff( $this->in_footer, (array) $handle );
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}
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$obj = $this->registered[ $handle ];
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if ( null === $obj->ver ) {
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$ver = '';
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} else {
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$ver = $obj->ver ? $obj->ver : $this->default_version;
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}
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if ( isset( $this->args[ $handle ] ) ) {
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$ver = $ver ? $ver . '&' . $this->args[ $handle ] : $this->args[ $handle ];
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}
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$src = $obj->src;
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$strategy = $this->get_eligible_loading_strategy( $handle );
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$intended_strategy = (string) $this->get_data( $handle, 'strategy' );
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$cond_before = '';
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$cond_after = '';
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$conditional = isset( $obj->extra['conditional'] ) ? $obj->extra['conditional'] : '';
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if ( ! $this->is_delayed_strategy( $intended_strategy ) ) {
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$intended_strategy = '';
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}
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/*
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* Move this script to the footer if:
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* 1. The script is in the header group.
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* 2. The current output is the header.
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* 3. The intended strategy is delayed.
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* 4. The actual strategy is not delayed.
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* 5. All dependent scripts are in the footer.
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*/
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if (
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0 === $group &&
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0 === $this->groups[ $handle ] &&
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$intended_strategy &&
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! $this->is_delayed_strategy( $strategy ) &&
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$this->are_all_dependents_in_footer( $handle )
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) {
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$this->in_footer[] = $handle;
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return false;
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}
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if ( $conditional ) {
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$cond_before = "<!--[if {$conditional}]>\n";
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$cond_after = "<![endif]-->\n";
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}
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$before_script = $this->get_inline_script_tag( $handle, 'before' );
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$after_script = $this->get_inline_script_tag( $handle, 'after' );
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if ( $before_script || $after_script ) {
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$inline_script_tag = $cond_before . $before_script . $after_script . $cond_after;
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} else {
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$inline_script_tag = '';
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}
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/*
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* Prevent concatenation of scripts if the text domain is defined
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* to ensure the dependency order is respected.
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*/
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$translations_stop_concat = ! empty( $obj->textdomain );
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$translations = $this->print_translations( $handle, false );
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if ( $translations ) {
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$translations = wp_get_inline_script_tag( $translations, array( 'id' => "{$handle}-js-translations" ) );
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}
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if ( $this->do_concat ) {
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/**
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* Filters the script loader source.
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*
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* @since 2.2.0
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*
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* @param string $src Script loader source path.
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* @param string $handle Script handle.
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*/
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$srce = apply_filters( 'script_loader_src', $src, $handle );
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if (
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$this->in_default_dir( $srce )
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&& ( $before_script || $after_script || $translations_stop_concat || $this->is_delayed_strategy( $strategy ) )
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) {
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$this->do_concat = false;
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// Have to print the so-far concatenated scripts right away to maintain the right order.
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_print_scripts();
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$this->reset();
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} elseif ( $this->in_default_dir( $srce ) && ! $conditional ) {
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$this->print_code .= $this->print_extra_script( $handle, false );
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$this->concat .= "$handle,";
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$this->concat_version .= "$handle$ver";
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return true;
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} else {
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$this->ext_handles .= "$handle,";
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$this->ext_version .= "$handle$ver";
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}
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}
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$has_conditional_data = $conditional && $this->get_data( $handle, 'data' );
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if ( $has_conditional_data ) {
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echo $cond_before;
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}
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$this->print_extra_script( $handle );
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if ( $has_conditional_data ) {
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echo $cond_after;
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}
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// A single item may alias a set of items, by having dependencies, but no source.
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if ( ! $src ) {
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if ( $inline_script_tag ) {
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if ( $this->do_concat ) {
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$this->print_html .= $inline_script_tag;
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} else {
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echo $inline_script_tag;
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}
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}
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return true;
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}
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if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && str_starts_with( $src, $this->content_url ) ) ) {
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$src = $this->base_url . $src;
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}
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if ( ! empty( $ver ) ) {
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$src = add_query_arg( 'ver', $ver, $src );
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}
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/** This filter is documented in wp-includes/class-wp-scripts.php */
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$src = esc_url_raw( apply_filters( 'script_loader_src', $src, $handle ) );
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if ( ! $src ) {
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return true;
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}
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$attr = array(
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'src' => $src,
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'id' => "{$handle}-js",
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);
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if ( $strategy ) {
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$attr[ $strategy ] = true;
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}
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if ( $intended_strategy ) {
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$attr['data-wp-strategy'] = $intended_strategy;
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}
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$tag = $translations . $cond_before . $before_script;
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$tag .= wp_get_script_tag( $attr );
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$tag .= $after_script . $cond_after;
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/**
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* Filters the HTML script tag of an enqueued script.
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*
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* @since 4.1.0
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*
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* @param string $tag The `<script>` tag for the enqueued script.
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* @param string $handle The script's registered handle.
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* @param string $src The script's source URL.
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*/
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$tag = apply_filters( 'script_loader_tag', $tag, $handle, $src );
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if ( $this->do_concat ) {
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$this->print_html .= $tag;
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} else {
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echo $tag;
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}
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return true;
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}
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/**
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* Adds extra code to a registered script.
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*
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* @since 4.5.0
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*
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* @param string $handle Name of the script to add the inline script to.
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* Must be lowercase.
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* @param string $data String containing the JavaScript to be added.
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* @param string $position Optional. Whether to add the inline script
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* before the handle or after. Default 'after'.
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* @return bool True on success, false on failure.
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*/
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public function add_inline_script( $handle, $data, $position = 'after' ) {
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if ( ! $data ) {
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return false;
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}
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if ( 'after' !== $position ) {
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$position = 'before';
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}
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$script = (array) $this->get_data( $handle, $position );
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$script[] = $data;
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return $this->add_data( $handle, $position, $script );
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}
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|
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/**
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* Prints inline scripts registered for a specific handle.
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*
|
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* @since 4.5.0
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* @deprecated 6.3.0 Use methods get_inline_script_tag() or get_inline_script_data() instead.
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*
|
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* @param string $handle Name of the script to print inline scripts for.
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* Must be lowercase.
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* @param string $position Optional. Whether to add the inline script
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* before the handle or after. Default 'after'.
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* @param bool $display Optional. Whether to print the script tag
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* instead of just returning the script data. Default true.
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* @return string|false Script data on success, false otherwise.
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*/
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public function print_inline_script( $handle, $position = 'after', $display = true ) {
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_deprecated_function( __METHOD__, '6.3.0', 'WP_Scripts::get_inline_script_data() or WP_Scripts::get_inline_script_tag()' );
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$output = $this->get_inline_script_data( $handle, $position );
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if ( empty( $output ) ) {
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return false;
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}
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if ( $display ) {
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echo $this->get_inline_script_tag( $handle, $position );
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}
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return $output;
|
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}
|
|
|
|
/**
|
|
* 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.
|
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* Must be lowercase.
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|
* @param string $position Optional. Whether to add the inline script
|
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* before the handle or after. Default 'after'.
|
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* @return string Inline script, which may be empty string.
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*/
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public function get_inline_script_data( $handle, $position = 'after' ) {
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$data = $this->get_data( $handle, $position );
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if ( empty( $data ) || ! is_array( $data ) ) {
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return '';
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}
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return trim( implode( "\n", $data ), "\n" );
|
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}
|
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|
|
/**
|
|
* 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.
|
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* Must be lowercase.
|
|
* @param string $position Optional. Whether to get tag for inline
|
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* scripts in the before or after position. Default 'after'.
|
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* @return string Inline script, which may be empty string.
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*/
|
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public function get_inline_script_tag( $handle, $position = 'after' ) {
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$js = $this->get_inline_script_data( $handle, $position );
|
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if ( empty( $js ) ) {
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return '';
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}
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$id = "{$handle}-js-{$position}";
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|
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return wp_get_inline_script_tag( $js, compact( 'id' ) );
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}
|
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|
|
/**
|
|
* 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 $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 ) . ';';
|
|
|
|
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 ) {
|
|
$grp = 1;
|
|
} else {
|
|
$grp = (int) $this->get_data( $handle, 'group' );
|
|
}
|
|
|
|
if ( false !== $group && $grp > $group ) {
|
|
$grp = $group;
|
|
}
|
|
|
|
return parent::set_group( $handle, $recursion, $grp );
|
|
}
|
|
|
|
/**
|
|
* Sets a translation textdomain.
|
|
*
|
|
* @since 5.0.0
|
|
* @since 5.1.0 The `$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 ) {
|
|
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 ) {
|
|
$r = 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 $r;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
foreach ( (array) $this->default_dirs as $test ) {
|
|
if ( str_starts_with( $src, $test ) ) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* 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 ( '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.' ),
|
|
$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).' ),
|
|
$value,
|
|
$handle
|
|
),
|
|
'6.3.0'
|
|
);
|
|
return false;
|
|
}
|
|
}
|
|
return parent::add_data( $handle, $key, $value );
|
|
}
|
|
|
|
/**
|
|
* Gets all dependents of a script.
|
|
*
|
|
* @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 $strategy The strategy to check.
|
|
* @return bool True if $strategy is one of the delayed strategies, otherwise false.
|
|
*/
|
|
private function is_delayed_strategy( $strategy ) {
|
|
return in_array(
|
|
$strategy,
|
|
$this->delayed_strategies,
|
|
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 = (string) $this->get_data( $handle, 'strategy' );
|
|
|
|
// Bail early if there is no intended strategy.
|
|
if ( ! $intended ) {
|
|
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 = ( 'defer' === $intended ) ? array( 'defer' ) : null;
|
|
|
|
$eligible = $this->filter_eligible_strategies( $handle, $initial );
|
|
|
|
// Return early once we know the eligible strategy is blocking.
|
|
if ( empty( $eligible ) ) {
|
|
return '';
|
|
}
|
|
|
|
return in_array( 'async', $eligible, 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 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.
|
|
* @return string[] A list of eligible loading strategies that could be used.
|
|
*/
|
|
private function filter_eligible_strategies( $handle, $eligible = null, $checked = array() ) {
|
|
// If no strategies are being passed, all strategies are eligible.
|
|
if ( null === $eligible ) {
|
|
$eligible = $this->delayed_strategies;
|
|
}
|
|
|
|
// If this handle was already checked, return early.
|
|
if ( isset( $checked[ $handle ] ) ) {
|
|
return $eligible;
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
// If the handle is not enqueued, don't filter anything and return.
|
|
if ( ! $this->query( $handle, 'enqueued' ) ) {
|
|
return $eligible;
|
|
}
|
|
|
|
$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 = 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 ) ) {
|
|
return array();
|
|
}
|
|
|
|
$eligible = $this->filter_eligible_strategies( $dependent, $eligible, $checked );
|
|
}
|
|
|
|
return $eligible;
|
|
}
|
|
|
|
/**
|
|
* 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 = '';
|
|
}
|
|
}
|