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7f29687a55
git-svn-id: http://core.svn.wordpress.org/branches/4.3@33847 1a063a9b-81f0-0310-95a4-ce76da25c4cd
294 lines
9.5 KiB
PHP
294 lines
9.5 KiB
PHP
<?php
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/**
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* BackPress Scripts Procedural API
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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 BackPress
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*/
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/**
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* Initialize $wp_scripts if it has not been set.
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*
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* @global WP_Scripts $wp_scripts
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*
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* @since 4.2.0
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*
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* @return WP_Scripts WP_Scripts instance.
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*/
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function wp_scripts() {
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global $wp_scripts;
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if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
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$wp_scripts = new WP_Scripts();
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}
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return $wp_scripts;
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}
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/**
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* Helper function to output a _doing_it_wrong message when applicable.
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*
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* @ignore
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* @since 4.2.0
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*
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* @param string $function Function name.
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*/
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function _wp_scripts_maybe_doing_it_wrong( $function ) {
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if ( did_action( 'init' ) ) {
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return;
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}
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_doing_it_wrong( $function, sprintf(
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__( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ),
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'<code>wp_enqueue_scripts</code>',
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'<code>admin_enqueue_scripts</code>',
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'<code>login_enqueue_scripts</code>'
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), '3.3' );
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}
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/**
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* Print scripts in document head that are in the $handles queue.
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*
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* Called by admin-header.php and wp_head hook. Since it is called by wp_head on every page load,
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* the function does not instantiate the WP_Scripts object unless script names are explicitly passed.
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* Makes use of already-instantiated $wp_scripts global if present. Use provided wp_print_scripts
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* hook to register/enqueue new scripts.
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*
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* @see WP_Scripts::do_items()
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* @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
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*
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* @since 2.6.0
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*
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* @param string|bool|array $handles Optional. Scripts to be printed. Default 'false'.
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* @return array On success, a processed array of WP_Dependencies items; otherwise, an empty array.
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*/
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function wp_print_scripts( $handles = false ) {
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/**
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* Fires before scripts in the $handles queue are printed.
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*
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* @since 2.1.0
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*/
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do_action( 'wp_print_scripts' );
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if ( '' === $handles ) { // for wp_head
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$handles = false;
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}
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_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
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global $wp_scripts;
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if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
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if ( ! $handles ) {
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return array(); // No need to instantiate if nothing is there.
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}
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}
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return wp_scripts()->do_items( $handles );
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}
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/**
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* Register a new script.
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*
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* Registers a script to be linked later using the wp_enqueue_script() function.
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*
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* @see WP_Dependencies::add(), WP_Dependencies::add_data()
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*
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* @since 2.6.0
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* @since 4.3.0 A return value was added.
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*
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* @param string $handle Name of the script. Should be unique.
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* @param string $src Path to the script from the WordPress root directory. Example: '/js/myscript.js'.
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* @param array $deps Optional. An array of registered script handles this script depends on. Set to false if there
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* are no dependencies. Default empty array.
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* @param string|bool $ver Optional. String specifying script version number, if it has one, which is concatenated
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* to end of path as a query string. If no version is specified or set to false, a version
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* number is automatically added equal to current installed WordPress version.
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* If set to null, no version is added. Default 'false'. Accepts 'false', 'null', or 'string'.
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* @param bool $in_footer Optional. Whether to enqueue the script before </head> or before </body>.
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* Default 'false'. Accepts 'false' or 'true'.
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* @return bool Whether the script has been registered. True on success, false on failure.
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*/
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function wp_register_script( $handle, $src, $deps = array(), $ver = false, $in_footer = false ) {
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$wp_scripts = wp_scripts();
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_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
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$registered = $wp_scripts->add( $handle, $src, $deps, $ver );
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if ( $in_footer ) {
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$wp_scripts->add_data( $handle, 'group', 1 );
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}
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return $registered;
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}
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/**
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* Localize a script.
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*
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* Works only if the script has already been added.
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*
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* Accepts an associative array $l10n and creates a JavaScript object:
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*
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* "$object_name" = {
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* key: value,
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* key: value,
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* ...
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* }
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*
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*
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* @see WP_Dependencies::localize()
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* @link https://core.trac.wordpress.org/ticket/11520
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* @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
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*
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* @since 2.6.0
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*
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* @todo Documentation cleanup
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*
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* @param string $handle Script handle the data will be attached to.
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* @param string $object_name Name for the JavaScript object. Passed directly, so it should be qualified JS variable.
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* Example: '/[a-zA-Z0-9_]+/'.
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* @param array $l10n The data itself. The data can be either a single or multi-dimensional array.
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* @return bool True if the script was successfully localized, false otherwise.
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*/
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function wp_localize_script( $handle, $object_name, $l10n ) {
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global $wp_scripts;
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if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
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_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
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return false;
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}
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return $wp_scripts->localize( $handle, $object_name, $l10n );
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}
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/**
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* Remove a registered script.
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*
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* Note: there are intentional safeguards in place to prevent critical admin scripts,
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* such as jQuery core, from being unregistered.
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*
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* @see WP_Dependencies::remove()
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*
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* @since 2.6.0
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*
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* @param string $handle Name of the script to be removed.
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*/
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function wp_deregister_script( $handle ) {
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_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
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/**
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* Do not allow accidental or negligent de-registering of critical scripts in the admin.
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* Show minimal remorse if the correct hook is used.
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*/
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$current_filter = current_filter();
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if ( ( is_admin() && 'admin_enqueue_scripts' !== $current_filter ) ||
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( 'wp-login.php' === $GLOBALS['pagenow'] && 'login_enqueue_scripts' !== $current_filter )
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) {
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$no = array(
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'jquery', 'jquery-core', 'jquery-migrate', 'jquery-ui-core', 'jquery-ui-accordion',
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'jquery-ui-autocomplete', 'jquery-ui-button', 'jquery-ui-datepicker', 'jquery-ui-dialog',
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'jquery-ui-draggable', 'jquery-ui-droppable', 'jquery-ui-menu', 'jquery-ui-mouse',
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'jquery-ui-position', 'jquery-ui-progressbar', 'jquery-ui-resizable', 'jquery-ui-selectable',
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'jquery-ui-slider', 'jquery-ui-sortable', 'jquery-ui-spinner', 'jquery-ui-tabs',
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'jquery-ui-tooltip', 'jquery-ui-widget', 'underscore', 'backbone',
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);
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if ( in_array( $handle, $no ) ) {
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$message = sprintf( __( 'Do not deregister the %1$s script in the administration area. To target the frontend theme, use the %2$s hook.' ),
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"<code>$handle</code>", '<code>wp_enqueue_scripts</code>' );
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_doing_it_wrong( __FUNCTION__, $message, '3.6' );
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return;
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}
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}
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wp_scripts()->remove( $handle );
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}
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/**
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* Enqueue a script.
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*
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* Registers the script if $src provided (does NOT overwrite), and enqueues it.
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*
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* @see WP_Dependencies::add(), WP_Dependencies::add_data(), WP_Dependencies::enqueue()
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*
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* @since 2.6.0
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*
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* @param string $handle Name of the script.
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* @param string|bool $src Path to the script from the root directory of WordPress. Example: '/js/myscript.js'.
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* @param array $deps An array of registered handles this script depends on. Default empty array.
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* @param string|bool $ver Optional. String specifying the script version number, if it has one. This parameter
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* is used to ensure that the correct version is sent to the client regardless of caching,
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* and so should be included if a version number is available and makes sense for the script.
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* @param bool $in_footer Optional. Whether to enqueue the script before </head> or before </body>.
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* Default 'false'. Accepts 'false' or 'true'.
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*/
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function wp_enqueue_script( $handle, $src = false, $deps = array(), $ver = false, $in_footer = false ) {
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$wp_scripts = wp_scripts();
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_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
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if ( $src || $in_footer ) {
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$_handle = explode( '?', $handle );
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if ( $src ) {
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$wp_scripts->add( $_handle[0], $src, $deps, $ver );
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}
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if ( $in_footer ) {
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$wp_scripts->add_data( $_handle[0], 'group', 1 );
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}
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}
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$wp_scripts->enqueue( $handle );
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}
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/**
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* Remove a previously enqueued script.
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*
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* @see WP_Dependencies::dequeue()
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*
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* @since 3.1.0
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*
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* @param string $handle Name of the script to be removed.
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*/
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function wp_dequeue_script( $handle ) {
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_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
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wp_scripts()->dequeue( $handle );
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}
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/**
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* Check whether a script has been added to the queue.
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*
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* @since 2.8.0
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* @since 3.5.0 'enqueued' added as an alias of the 'queue' list.
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*
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* @param string $handle Name of the script.
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* @param string $list Optional. Status of the script to check. Default 'enqueued'.
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* Accepts 'enqueued', 'registered', 'queue', 'to_do', and 'done'.
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* @return bool Whether the script script is queued.
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*/
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function wp_script_is( $handle, $list = 'enqueued' ) {
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_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
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return (bool) wp_scripts()->query( $handle, $list );
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}
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/**
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* Add metadata to a script.
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*
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* Works only if the script has already been added.
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*
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* Possible values for $key and $value:
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* 'conditional' string Comments for IE 6, lte IE 7, etc.
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*
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* @since 4.2.0
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*
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* @see WP_Dependency::add_data()
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*
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* @param string $handle Name of the script.
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* @param string $key Name of data point for which we're storing a value.
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* @param mixed $value String containing the data to be added.
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* @return bool True on success, false on failure.
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*/
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function wp_script_add_data( $handle, $key, $value ){
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return wp_scripts()->add_data( $handle, $key, $value );
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}
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