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<?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
* @var string
*/
public $base_url;
/**
* URL of the content directory.
*
* @since 2.8.0
* @var string
*/
public $content_url;
/**
* Default version string for scripts.
*
* @since 2.6.0
* @var string
*/
public $default_version;
/**
* Holds handles of scripts which are enqueued in footer.
*
* @since 2.8.0
* @var array
*/
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
* @var array
*/
public $default_dirs;
/**
* Holds a string which contains the type attribute for script tag.
*
* If the current theme does not declare HTML5 support for 'script',
* then it initializes as `type='text/javascript'`.
*
* @since 5.3.0
* @var string
*/
private $type_attr = '';
/**
* 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() {
if (
function_exists( 'is_admin' ) && ! is_admin()
&&
function_exists( 'current_theme_supports' ) && ! current_theme_supports( 'html5', 'script' )
) {
$this->type_attr = " type='text/javascript'";
}
/**
* Fires when the WP_Scripts instance is initialized.
*
* @since 2.6.0
*
* @param WP_Scripts $this WP_Scripts instance (passed by reference).
*/
do_action_ref_array( 'wp_default_scripts', array( &$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, $group );
}
/**
* Prints extra scripts of a registered script.
*
* @since 2.1.0
* @since 2.8.0 Added the `$echo` parameter.
* @deprecated 3.3.0
*
* @see print_extra_script()
*
* @param string $handle The script's registered handle.
* @param bool $echo Optional. Whether to echo the extra script
* instead of just returning it. Default true.
* @return bool|string|void Void if no data exists, extra scripts if `$echo` is true,
* true otherwise.
*/
public function print_scripts_l10n( $handle, $echo = true ) {
_deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' );
return $this->print_extra_script( $handle, $echo );
}
/**
* Prints extra scripts of a registered script.
*
* @since 3.3.0
*
* @param string $handle The script's registered handle.
* @param bool $echo Optional. Whether to echo the extra script
* instead of just returning it. Default true.
* @return bool|string|void Void if no data exists, extra scripts if `$echo` is true,
* true otherwise.
*/
public function print_extra_script( $handle, $echo = true ) {
$output = $this->get_data( $handle, 'data' );
if ( ! $output ) {
return;
}
if ( ! $echo ) {
return $output;
}
echo "<script{$this->type_attr}>\n";
// CDATA is not needed for HTML 5.
if ( $this->type_attr ) {
echo "/* <![CDATA[ */\n";
}
echo "$output\n";
if ( $this->type_attr ) {
echo "/* ]]> */\n";
}
echo "</script>\n";
return true;
}
/**
* Processes a script dependency.
*
* @since 2.6.0
* @since 2.8.0 Added the `$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 ( 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;
$cond_before = '';
$cond_after = '';
$conditional = isset( $obj->extra['conditional'] ) ? $obj->extra['conditional'] : '';
if ( $conditional ) {
$cond_before = "<!--[if {$conditional}]>\n";
$cond_after = "<![endif]-->\n";
}
$before_handle = $this->print_inline_script( $handle, 'before', false );
$after_handle = $this->print_inline_script( $handle, 'after', false );
if ( $before_handle ) {
$before_handle = sprintf( "<script%s>\n%s\n</script>\n", $this->type_attr, $before_handle );
}
if ( $after_handle ) {
$after_handle = sprintf( "<script%s>\n%s\n</script>\n", $this->type_attr, $after_handle );
}
if ( $before_handle || $after_handle ) {
$inline_script_tag = $cond_before . $before_handle . $after_handle . $cond_after;
} else {
$inline_script_tag = '';
}
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.
*/
$srce = apply_filters( 'script_loader_src', $src, $handle );
if ( $this->in_default_dir( $srce ) && ( $before_handle || $after_handle ) ) {
$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( $srce ) && ! $conditional ) {
$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";
}
}
$has_conditional_data = $conditional && $this->get_data( $handle, 'data' );
if ( $has_conditional_data ) {
echo $cond_before;
}
$this->print_extra_script( $handle );
if ( $has_conditional_data ) {
echo $cond_after;
}
// 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;
}
$translations = $this->print_translations( $handle, false );
if ( $translations ) {
$translations = sprintf( "<script%s>\n%s\n</script>\n", $this->type_attr, $translations );
}
if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && 0 === strpos( $src, $this->content_url ) ) ) {
$src = $this->base_url . $src;
}
if ( ! empty( $ver ) ) {
$src = add_query_arg( 'ver', $ver, $src );
}
/** This filter is documented in wp-includes/class.wp-scripts.php */
$src = esc_url( apply_filters( 'script_loader_src', $src, $handle ) );
if ( ! $src ) {
return true;
}
$tag = $translations . $cond_before . $before_handle;
$tag .= sprintf( "<script%s src='%s'></script>\n", $this->type_attr, $src );
$tag .= $after_handle . $cond_after;
/**
* 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
*
* @param string $handle Name of the script to add the inline script to.
* Must be lowercase.
* @param string $position Optional. Whether to add the inline script
* before the handle or after. Default 'after'.
* @param bool $echo Optional. Whether to echo the script
* instead of just returning it. Default true.
* @return string|false Script on success, false otherwise.
*/
public function print_inline_script( $handle, $position = 'after', $echo = true ) {
$output = $this->get_data( $handle, $position );
if ( empty( $output ) ) {
return false;
}
$output = trim( implode( "\n", $output ), "\n" );
if ( $echo ) {
printf( "<script%s>\n%s\n</script>\n", $this->type_attr, $output );
}
return $output;
}
/**
* 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'] );
}
foreach ( (array) $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 = null ) {
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 $echo Optional. Whether to echo the script
* instead of just returning it. Default true.
* @return string|false Script on success, false otherwise.
*/
public function print_translations( $handle, $echo = true ) {
if ( ! isset( $this->registered[ $handle ] ) || empty( $this->registered[ $handle ]->textdomain ) ) {
return false;
}
$domain = $this->registered[ $handle ]->textdomain;
$path = $this->registered[ $handle ]->translations_path;
$json_translations = load_script_textdomain( $handle, $domain, $path );
if ( ! $json_translations ) {
// Register empty locale data object to ensure the domain still exists.
$json_translations = '{ "locale_data": { "messages": { "": {} } } }';
}
$output = <<<JS
( function( domain, translations ) {
var localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
localeData[""].domain = domain;
wp.i18n.setLocaleData( localeData, domain );
} )( "{$domain}", {$json_translations} );
JS;
if ( $echo ) {
printf( "<script%s>\n%s\n</script>\n", $this->type_attr, $output );
}
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 ( 0 === strpos( $src, '/' . WPINC . '/js/l10n' ) ) {
return false;
}
foreach ( (array) $this->default_dirs as $test ) {
if ( 0 === strpos( $src, $test ) ) {
return true;
}
}
return false;
}
/**
* 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 = '';
}
}