WordPress/wp-includes/functions.wp-scripts.php

158 lines
4.2 KiB
PHP

<?php
/**
* BackPress script procedural API.
*
* @package BackPress
* @since r16
*/
/**
* Prints script tags in document head.
*
* Called by admin-header.php and by wp_head hook. Since it is called by wp_head
* on every page load, the function does not instantiate the WP_Scripts object
* unless script names are explicitly passed. Does make use of already
* instantiated $wp_scripts if present. Use provided wp_print_scripts hook to
* register/enqueue new scripts.
*
* @since r16
* @see WP_Dependencies::print_scripts()
*/
function wp_print_scripts( $handles = false ) {
do_action( 'wp_print_scripts' );
if ( '' === $handles ) // for wp_head
$handles = false;
global $wp_scripts;
if ( !is_a($wp_scripts, 'WP_Scripts') ) {
if ( !$handles )
return array(); // No need to instantiate if nothing is there.
else
$wp_scripts = new WP_Scripts();
}
return $wp_scripts->do_items( $handles );
}
/**
* Register new Javascript file.
*
* @since r16
* @param string $handle Script name
* @param string $src Script url
* @param array $deps (optional) Array of script names on which this script depends
* @param string|bool $ver (optional) Script version (used for cache busting), set to NULL to disable
* @param bool $in_footer (optional) Whether to enqueue the script before </head> or before </body>
* @return null
*/
function wp_register_script( $handle, $src, $deps = array(), $ver = false, $in_footer = false ) {
global $wp_scripts;
if ( !is_a($wp_scripts, 'WP_Scripts') )
$wp_scripts = new WP_Scripts();
$wp_scripts->add( $handle, $src, $deps, $ver );
if ( $in_footer )
$wp_scripts->add_data( $handle, 'group', 1 );
}
/**
* Adds extra Javascript data.
*
* Works only if the script has already been added.
* Accepts an associative array $data and creates JS object:
* "$name" = {
* key: value,
* key: value,
* ...
* }
* The $name is passed directly so it should be qualified JS variable /[a-zA-Z0-9_]+/
* The $data array is JSON encoded. If called more than once for the same $handle with the same $name,
* the object would contain all values. In that case if two or more keys are the same,
* the last value overwrites the previous. The function is named "localize_script" because of historical reasons.
*
* @since r16
* @see WP_Scripts::add_script_data()
*/
function wp_localize_script( $handle, $name, $data ) {
global $wp_scripts;
if ( !is_a($wp_scripts, 'WP_Scripts') )
return false;
return $wp_scripts->add_script_data( $handle, $name, $data );
}
/**
* Remove a registered script.
*
* @since r16
* @see WP_Scripts::remove() For parameter information.
*/
function wp_deregister_script( $handle ) {
global $wp_scripts;
if ( !is_a($wp_scripts, 'WP_Scripts') )
$wp_scripts = new WP_Scripts();
$wp_scripts->remove( $handle );
}
/**
* Enqueues script.
*
* Registers the script if src provided (does NOT overwrite) and enqueues.
*
* @since r16
* @see wp_register_script() For parameter information.
*/
function wp_enqueue_script( $handle, $src = false, $deps = array(), $ver = false, $in_footer = false ) {
global $wp_scripts;
if ( !is_a($wp_scripts, 'WP_Scripts') )
$wp_scripts = new WP_Scripts();
if ( $src ) {
$_handle = explode('?', $handle);
$wp_scripts->add( $_handle[0], $src, $deps, $ver );
if ( $in_footer )
$wp_scripts->add_data( $_handle[0], 'group', 1 );
}
$wp_scripts->enqueue( $handle );
}
/**
* Remove an enqueued script.
*
* @since WP 3.1
* @see WP_Scripts::dequeue() For parameter information.
*/
function wp_dequeue_script( $handle ) {
global $wp_scripts;
if ( !is_a($wp_scripts, 'WP_Scripts') )
$wp_scripts = new WP_Scripts();
$wp_scripts->dequeue( $handle );
}
/**
* Check whether script has been added to WordPress Scripts.
*
* The values for list defaults to 'queue', which is the same as enqueue for
* scripts.
*
* @since WP unknown; BP unknown
*
* @param string $handle Handle used to add script.
* @param string $list Optional, defaults to 'queue'. Others values are 'registered', 'queue', 'done', 'to_do'
* @return bool
*/
function wp_script_is( $handle, $list = 'queue' ) {
global $wp_scripts;
if ( !is_a($wp_scripts, 'WP_Scripts') )
$wp_scripts = new WP_Scripts();
$query = $wp_scripts->query( $handle, $list );
if ( is_object( $query ) )
return true;
return $query;
}