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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 stylesheets.
*
* @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;
/**
* 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 $this WP_Scripts instance (passed by reference).
*/
do_action_ref_array( 'wp_default_scripts', array(&$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 mixed $handles Optional. Scripts to be printed. (void) prints queue, (string) prints
* that script, (array of strings) prints those scripts. Default false.
* @param int $group Optional. If scripts were queued in groups prints this group number.
* Default false.
* @return array 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, $echo = true ) {
if ( !$output = $this->get_data( $handle, 'data' ) )
return;
if ( !$echo )
return $output;
echo "<script type='text/javascript'>\n"; // CDATA and type='text/javascript' is not needed for HTML 5
echo "/* <![CDATA[ */\n";
echo "$output\n";
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: (int) level, (false) no groups. 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 type='text/javascript'>\n%s\n</script>\n", $before_handle );
}
if ( $after_handle ) {
$after_handle = sprintf( "<script type='text/javascript'>\n%s\n</script>\n", $after_handle );
}
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 ( ! $obj->src ) {
return true;
}
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;
$tag = "{$cond_before}{$before_handle}<script type='text/javascript' src='$src'></script>\n{$after_handle}{$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 type='text/javascript'>\n%s\n</script>\n", $output );
}
return $output;
}
/**
* Localizes a script, only if the script has already been added.
*
* @since 2.1.0
*
* @param string $handle
* @param string $object_name
* @param array $l10n
* @return bool
*/
public function localize( $handle, $object_name, $l10n ) {
if ( $handle === 'jquery' )
$handle = 'jquery-core';
if ( is_array($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: (int) level, (false) no groups. 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 ) && $this->registered[$handle]->args === 1 )
$grp = 1;
else
$grp = (int) $this->get_data( $handle, 'group' );
if ( false !== $group && $grp > $group )
$grp = $group;
return parent::set_group( $handle, $recursion, $grp );
}
/**
* Determines script dependencies.
*
* @since 2.1.0
*
* @see WP_Dependencies::all_deps()
*
* @param mixed $handles Item handle and argument (string) or item handles and arguments (array of strings).
* @param bool $recursion Internal flag that function is calling itself.
* @param int|false $group Optional. Group level: (int) level, (false) no groups. 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 array $to_do An array of script dependencies.
*/
$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 array 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 array 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 = '';
}
}