X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/76aea3697c6043c1613370f172395b4f65ee71f0..53f4633144ed68c8b8fb5861f992b5489894a940:/wp-includes/functions.wp-scripts.php

diff --git a/wp-includes/functions.wp-scripts.php b/wp-includes/functions.wp-scripts.php
index 87995a4b..01ad19b1 100644
--- a/wp-includes/functions.wp-scripts.php
+++ b/wp-includes/functions.wp-scripts.php
@@ -1,77 +1,293 @@
 <?php
+/**
+ * BackPress Scripts Procedural API
+ *
+ * @since 2.6.0
+ *
+ * @package WordPress
+ * @subpackage BackPress
+ */
+
+/**
+ * Initialize $wp_scripts if it has not been set.
+ *
+ * @global WP_Scripts $wp_scripts
+ *
+ * @since 4.2.0
+ *
+ * @return WP_Scripts WP_Scripts instance.
+ */
+function wp_scripts() {
+	global $wp_scripts;
+	if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
+		$wp_scripts = new WP_Scripts();
+	}
+	return $wp_scripts;
+}
+
+/**
+ * Helper function to output a _doing_it_wrong message when applicable.
+ *
+ * @ignore
+ * @since 4.2.0
+ *
+ * @param string $function Function name.
+ */
+function _wp_scripts_maybe_doing_it_wrong( $function ) {
+	if ( did_action( 'init' ) ) {
+		return;
+	}
+
+	_doing_it_wrong( $function, sprintf(
+		__( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ),
+		'<code>wp_enqueue_scripts</code>',
+		'<code>admin_enqueue_scripts</code>',
+		'<code>login_enqueue_scripts</code>'
+	), '3.3' );
+}
 
 /**
- * Prints script tags in document head
+ * Print scripts in document head that are in the $handles queue.
  *
- * Called by admin-header.php and by wp_head hook. Since it is called by wp_head on every page load,
+ * Called by admin-header.php and 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.
+ * Makes use of already-instantiated $wp_scripts global if present. Use provided wp_print_scripts
+ * hook to register/enqueue new scripts.
  *
- * @see WP_Scripts::print_scripts()
+ * @see WP_Scripts::do_items()
+ * @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
+ *
+ * @since 2.6.0
+ *
+ * @param string|bool|array $handles Optional. Scripts to be printed. Default 'false'.
+ * @return array On success, a processed array of WP_Dependencies items; otherwise, an empty array.
  */
 function wp_print_scripts( $handles = false ) {
+	/**
+	 * Fires before scripts in the $handles queue are printed.
+	 *
+	 * @since 2.1.0
+	 */
 	do_action( 'wp_print_scripts' );
-	if ( '' === $handles ) // for wp_head
+	if ( '' === $handles ) { // for wp_head
 		$handles = false;
+	}
+
+	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
 
 	global $wp_scripts;
-	if ( !is_a($wp_scripts, 'WP_Scripts') ) {
-		if ( !$handles )
-			return array(); // No need to instantiate if nothing's there.
-		else
-			$wp_scripts = new WP_Scripts();
+	if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
+		if ( ! $handles ) {
+			return array(); // No need to instantiate if nothing is there.
+		}
 	}
 
-	return $wp_scripts->do_items( $handles );
+	return wp_scripts()->do_items( $handles );
 }
 
-function wp_register_script( $handle, $src, $deps = array(), $ver = false ) {
-	global $wp_scripts;
-	if ( !is_a($wp_scripts, 'WP_Scripts') )
-		$wp_scripts = new WP_Scripts();
+/**
+ * Register a new script.
+ *
+ * Registers a script to be linked later using the wp_enqueue_script() function.
+ *
+ * @see WP_Dependencies::add(), WP_Dependencies::add_data()
+ *
+ * @since 2.6.0
+ * @since 4.3.0 A return value was added.
+ *
+ * @param string      $handle    Name of the script. Should be unique.
+ * @param string      $src       Path to the script from the WordPress root directory. Example: '/js/myscript.js'.
+ * @param array       $deps      Optional. An array of registered script handles this script depends on. Set to false if there
+ *                               are no dependencies. Default empty array.
+ * @param string|bool $ver       Optional. String specifying script version number, if it has one, which is concatenated
+ *                               to end of path as a query string. If no version is specified or set to false, a version
+ *                               number is automatically added equal to current installed WordPress version.
+ *                               If set to null, no version is added. Default 'false'. Accepts 'false', 'null', or 'string'.
+ * @param bool        $in_footer Optional. Whether to enqueue the script before </head> or before </body>.
+ *                               Default 'false'. Accepts 'false' or 'true'.
+ * @return bool Whether the script has been registered. True on success, false on failure.
+ */
+function wp_register_script( $handle, $src, $deps = array(), $ver = false, $in_footer = false ) {
+	$wp_scripts = wp_scripts();
+	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
+
+	$registered = $wp_scripts->add( $handle, $src, $deps, $ver );
+	if ( $in_footer ) {
+		$wp_scripts->add_data( $handle, 'group', 1 );
+	}
 
-	$wp_scripts->add( $handle, $src, $deps, $ver );
+	return $registered;
 }
 
 /**
- * Localizes a script
+ * Localize a script.
+ *
+ * Works only if the script has already been added.
+ *
+ * Accepts an associative array $l10n and creates a JavaScript object:
+ *
+ *     "$object_name" = {
+ *         key: value,
+ *         key: value,
+ *         ...
+ *     }
  *
- * Localizes only if script has already been added
  *
- * @see WP_Script::localize()
+ * @see WP_Dependencies::localize()
+ * @link https://core.trac.wordpress.org/ticket/11520
+ * @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
+ *
+ * @since 2.6.0
+ *
+ * @todo Documentation cleanup
+ *
+ * @param string $handle      Script handle the data will be attached to.
+ * @param string $object_name Name for the JavaScript object. Passed directly, so it should be qualified JS variable.
+ *                            Example: '/[a-zA-Z0-9_]+/'.
+ * @param array $l10n         The data itself. The data can be either a single or multi-dimensional array.
+ * @return bool True if the script was successfully localized, false otherwise.
  */
 function wp_localize_script( $handle, $object_name, $l10n ) {
 	global $wp_scripts;
-	if ( !is_a($wp_scripts, 'WP_Scripts') )
+	if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
+		_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
 		return false;
+	}
 
 	return $wp_scripts->localize( $handle, $object_name, $l10n );
 }
 
+/**
+ * Remove a registered script.
+ *
+ * Note: there are intentional safeguards in place to prevent critical admin scripts,
+ * such as jQuery core, from being unregistered.
+ *
+ * @see WP_Dependencies::remove()
+ *
+ * @since 2.6.0
+ *
+ * @param string $handle Name of the script to be removed.
+ */
 function wp_deregister_script( $handle ) {
-	global $wp_scripts;
-	if ( !is_a($wp_scripts, 'WP_Scripts') )
-		$wp_scripts = new WP_Scripts();
+	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
+
+	/**
+	 * Do not allow accidental or negligent de-registering of critical scripts in the admin.
+	 * Show minimal remorse if the correct hook is used.
+	 */
+	$current_filter = current_filter();
+	if ( ( is_admin() && 'admin_enqueue_scripts' !== $current_filter ) ||
+		( 'wp-login.php' === $GLOBALS['pagenow'] && 'login_enqueue_scripts' !== $current_filter )
+	) {
+		$no = array(
+			'jquery', 'jquery-core', 'jquery-migrate', 'jquery-ui-core', 'jquery-ui-accordion',
+			'jquery-ui-autocomplete', 'jquery-ui-button', 'jquery-ui-datepicker', 'jquery-ui-dialog',
+			'jquery-ui-draggable', 'jquery-ui-droppable', 'jquery-ui-menu', 'jquery-ui-mouse',
+			'jquery-ui-position', 'jquery-ui-progressbar', 'jquery-ui-resizable', 'jquery-ui-selectable',
+			'jquery-ui-slider', 'jquery-ui-sortable', 'jquery-ui-spinner', 'jquery-ui-tabs',
+			'jquery-ui-tooltip', 'jquery-ui-widget', 'underscore', 'backbone',
+		);
 
-	$wp_scripts->remove( $handle );
+		if ( in_array( $handle, $no ) ) {
+			$message = sprintf( __( 'Do not deregister the %1$s script in the administration area. To target the frontend theme, use the %2$s hook.' ),
+				"<code>$handle</code>", '<code>wp_enqueue_scripts</code>' );
+			_doing_it_wrong( __FUNCTION__, $message, '3.6' );
+			return;
+		}
+	}
+
+	wp_scripts()->remove( $handle );
 }
 
 /**
- * Equeues script
+ * Enqueue a script.
  *
- * Registers the script if src provided (does NOT overwrite) and enqueues.
+ * Registers the script if $src provided (does NOT overwrite), and enqueues it.
  *
- * @see WP_Script::add(), WP_Script::enqueue()
-*/
-function wp_enqueue_script( $handle, $src = false, $deps = array(), $ver = false ) {
-	global $wp_scripts;
-	if ( !is_a($wp_scripts, 'WP_Scripts') )
-		$wp_scripts = new WP_Scripts();
+ * @see WP_Dependencies::add(), WP_Dependencies::add_data(), WP_Dependencies::enqueue()
+ *
+ * @since 2.6.0
+ *
+ * @param string      $handle    Name of the script.
+ * @param string|bool $src       Path to the script from the root directory of WordPress. Example: '/js/myscript.js'.
+ * @param array       $deps      An array of registered handles this script depends on. Default empty array.
+ * @param string|bool $ver       Optional. String specifying the script version number, if it has one. This parameter
+ *                               is used to ensure that the correct version is sent to the client regardless of caching,
+ *                               and so should be included if a version number is available and makes sense for the script.
+ * @param bool        $in_footer Optional. Whether to enqueue the script before </head> or before </body>.
+ *                               Default 'false'. Accepts 'false' or 'true'.
+ */
+function wp_enqueue_script( $handle, $src = false, $deps = array(), $ver = false, $in_footer = false ) {
+	$wp_scripts = wp_scripts();
+
+	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
+
 
-	if ( $src ) {
-		$_handle = explode('?', $handle);
-		$wp_scripts->add( $_handle[0], $src, $deps, $ver );
+	if ( $src || $in_footer ) {
+		$_handle = explode( '?', $handle );
+
+		if ( $src ) {
+			$wp_scripts->add( $_handle[0], $src, $deps, $ver );
+		}
+
+		if ( $in_footer ) {
+			$wp_scripts->add_data( $_handle[0], 'group', 1 );
+		}
 	}
+
 	$wp_scripts->enqueue( $handle );
 }
+
+/**
+ * Remove a previously enqueued script.
+ *
+ * @see WP_Dependencies::dequeue()
+ *
+ * @since 3.1.0
+ *
+ * @param string $handle Name of the script to be removed.
+ */
+function wp_dequeue_script( $handle ) {
+	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
+
+	wp_scripts()->dequeue( $handle );
+}
+
+/**
+ * Check whether a script has been added to the queue.
+ *
+ * @since 2.8.0
+ * @since 3.5.0 'enqueued' added as an alias of the 'queue' list.
+ *
+ * @param string $handle Name of the script.
+ * @param string $list   Optional. Status of the script to check. Default 'enqueued'.
+ *                       Accepts 'enqueued', 'registered', 'queue', 'to_do', and 'done'.
+ * @return bool Whether the script script is queued.
+ */
+function wp_script_is( $handle, $list = 'enqueued' ) {
+	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
+
+	return (bool) wp_scripts()->query( $handle, $list );
+}
+
+/**
+ * Add metadata to a script.
+ *
+ * Works only if the script has already been added.
+ *
+ * Possible values for $key and $value:
+ * 'conditional' string Comments for IE 6, lte IE 7, etc.
+ *
+ * @since 4.2.0
+ *
+ * @see WP_Dependency::add_data()
+ *
+ * @param string $handle Name of the script.
+ * @param string $key    Name of data point for which we're storing a value.
+ * @param mixed  $value  String containing the data to be added.
+ * @return bool True on success, false on failure.
+ */
+function wp_script_add_data( $handle, $key, $value ){
+	return wp_scripts()->add_data( $handle, $key, $value );
+}