As the sun rises and the forest mist clears, and the clouds return and the caves darken, these changes of light and shadow are the morning and evening in the mountains. Wildflowers bloom with their subtle fragrance, fine trees flourish with their dense shade, the wind and frost are pure and clean, and the water recedes to reveal the rocks—these are the four seasons in the mountains. Going out in the morning and returning in the evening, the scenery of the four seasons is different, and the joy is endless.至于负者歌于途,行者休于树,前者呼,后者应,伛偻提携,往来而不绝者,滁人游也。临溪而渔,溪深而鱼肥,酿泉为酒,泉香而酒洌,山肴野蔌,杂然而前陈者,太守宴也。宴酣之乐,非丝非竹,射者中,弈者胜,觥筹交错,起坐而喧哗者,众宾欢也。苍颜白发,颓然乎其间者,太守醉也。
<?php
/**
* Dependencies API: Scripts functions
*
* @since 2.6.0
*
* @package WordPress
* @subpackage Dependencies
*/
/**
* Initializes $wp_scripts if it has not been set.
*
* @since 4.2.0
*
* @global WP_Scripts $wp_scripts
*
* @return WP_Scripts WP_Scripts instance.
*/
function wp_scripts() {
global $wp_scripts;
if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
$wp_scripts = new WP_Scripts();
}
return $wp_scripts;
}
/**
* Helper function to output a _doing_it_wrong message when applicable.
*
* @ignore
* @since 4.2.0
* @since 5.5.0 Added the `$handle` parameter.
*
* @param string $function_name Function name.
* @param string $handle Optional. Name of the script or stylesheet that was
* registered or enqueued too early. Default empty.
*/
function _wp_scripts_maybe_doing_it_wrong( $function_name, $handle = '' ) {
if ( did_action( 'init' ) || did_action( 'wp_enqueue_scripts' )
|| did_action( 'admin_enqueue_scripts' ) || did_action( 'login_enqueue_scripts' )
) {
return;
}
$message = sprintf(
/* translators: 1: wp_enqueue_scripts, 2: admin_enqueue_scripts, 3: login_enqueue_scripts */
__( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ),
'<code>wp_enqueue_scripts</code>',
'<code>admin_enqueue_scripts</code>',
'<code>login_enqueue_scripts</code>'
);
if ( $handle ) {
$message .= ' ' . sprintf(
/* translators: %s: Name of the script or stylesheet. */
__( 'This notice was triggered by the %s handle.' ),
'<code>' . $handle . '</code>'
);
}
_doing_it_wrong(
$function_name,
$message,
'3.3.0'
);
}
/**
* Prints scripts in document head that are in the $handles queue.
*
* Called by admin-header.php and {@see 'wp_head'} hook. Since it is called by wp_head on every page load,
* the function does not instantiate the WP_Scripts object unless script names are explicitly passed.
* Makes use of already-instantiated `$wp_scripts` global if present. Use provided {@see 'wp_print_scripts'}
* hook to register/enqueue new scripts.
*
* @see WP_Scripts::do_item()
* @since 2.1.0
*
* @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
*
* @param string|string[]|false $handles Optional. Scripts to be printed. Default 'false'.
* @return string[] On success, an array of handles of processed WP_Dependencies items; otherwise, an empty array.
*/
function wp_print_scripts( $handles = false ) {
global $wp_scripts;
/**
* Fires before scripts in the $handles queue are printed.
*
* @since 2.1.0
*/
do_action( 'wp_print_scripts' );
if ( '' === $handles ) { // For 'wp_head'.
$handles = false;
}
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
if ( ! $handles ) {
return array(); // No need to instantiate if nothing is there.
}
}
return wp_scripts()->do_items( $handles );
}
/**
* Adds extra code to a registered script.
*
* Code will only be added if the script is already in the queue.
* Accepts a string `$data` containing the code. If two or more code blocks
* are added to the same script `$handle`, they will be printed in the order
* they were added, i.e. the latter added code can redeclare the previous.
*
* @since 4.5.0
*
* @see WP_Scripts::add_inline_script()
*
* @param string $handle Name of the script to add the inline script to.
* @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.
*/
function wp_add_inline_script( $handle, $data, $position = 'after' ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
if ( false !== stripos( $data, '</script>' ) ) {
_doing_it_wrong(
__FUNCTION__,
sprintf(
/* translators: 1: <script>, 2: wp_add_inline_script() */
__( 'Do not pass %1$s tags to %2$s.' ),
'<code><script></code>',
'<code>wp_add_inline_script()</code>'
),
'4.5.0'
);
$data = trim( preg_replace( '#<script[^>]*>(.*)</script>#is', '$1', $data ) );
}
return wp_scripts()->add_inline_script( $handle, $data, $position );
}
/**
* Registers a new script.
*
* Registers a script to be enqueued later using the wp_enqueue_script() function.
*
* @see WP_Dependencies::add()
* @see WP_Dependencies::add_data()
*
* @since 2.1.0
* @since 4.3.0 A return value was added.
* @since 6.3.0 The $in_footer parameter of type boolean was overloaded to be an $args parameter of type array.
* @since 6.9.0 The $fetchpriority parameter of type string was added to the $args parameter of type array.
*
* @param string $handle Name of the script. Should be unique.
* @param string|false $src Full URL of the script, or path of the script relative to the WordPress root directory.
* If source is set to false, script is an alias of other scripts it depends on.
* @param string[] $deps Optional. An array of registered script handles this script depends on. Default empty array.
* @param string|bool|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
* as a query string for cache busting purposes. If version is set to false, a version
* number is automatically added equal to current installed WordPress version.
* If set to null, no version is added.
* @param array|bool $args {
* Optional. An array of additional script loading strategies. Default empty array.
* Otherwise, it may be a boolean in which case it determines whether the script is printed in the footer. Default false.
*
* @type string $strategy Optional. If provided, may be either 'defer' or 'async'.
* @type bool $in_footer Optional. Whether to print the script in the footer. Default 'false'.
* @type string $fetchpriority Optional. The fetch priority for the script. Default 'auto'.
* }
* @return bool Whether the script has been registered. True on success, false on failure.
*/
function wp_register_script( $handle, $src, $deps = array(), $ver = false, $args = array() ) {
if ( ! is_array( $args ) ) {
$args = array(
'in_footer' => (bool) $args,
);
}
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
$wp_scripts = wp_scripts();
$registered = $wp_scripts->add( $handle, $src, $deps, $ver );
if ( ! empty( $args['in_footer'] ) ) {
$wp_scripts->add_data( $handle, 'group', 1 );
}
if ( ! empty( $args['strategy'] ) ) {
$wp_scripts->add_data( $handle, 'strategy', $args['strategy'] );
}
if ( ! empty( $args['fetchpriority'] ) ) {
$wp_scripts->add_data( $handle, 'fetchpriority', $args['fetchpriority'] );
}
return $registered;
}
/**
* Localizes a script.
*
* Works only if the script has already been registered.
*
* Accepts an associative array `$l10n` and creates a JavaScript object:
*
* "$object_name": {
* key: value,
* key: value,
* ...
* }
*
* @see WP_Scripts::localize()
* @link https://core.trac.wordpress.org/ticket/11520
*
* @since 2.2.0
*
* @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 ) {
$wp_scripts = wp_scripts();
return $wp_scripts->localize( $handle, $object_name, $l10n );
}
/**
* Sets translated strings for a script.
*
* Works only if the script has already been registered.
*
* @see WP_Scripts::set_translations()
* @since 5.0.0
* @since 5.1.0 The `$domain` parameter was made optional.
*
* @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
*
* @param string $handle Script handle the textdomain will be attached 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 successfully localized, false otherwise.
*/
function wp_set_script_translations( $handle, $domain = 'default', $path = '' ) {
global $wp_scripts;
if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
return false;
}
return $wp_scripts->set_translations( $handle, $domain, $path );
}
/**
* Removes 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 2.1.0
*
* @global string $pagenow The filename of the current screen.
*
* @param string $handle Name of the script to be removed.
*/
function wp_deregister_script( $handle ) {
global $pagenow;
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
/**
* 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' === $pagenow && 'login_enqueue_scripts' !== $current_filter )
) {
$not_allowed = 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',
);
if ( in_array( $handle, $not_allowed, true ) ) {
_doing_it_wrong(
__FUNCTION__,
sprintf(
/* translators: 1: Script name, 2: wp_enqueue_scripts */
__( 'Do not deregister the %1$s script in the administration area. To target the front-end theme, use the %2$s hook.' ),
"<code>$handle</code>",
'<code>wp_enqueue_scripts</code>'
),
'3.6.0'
);
return;
}
}
wp_scripts()->remove( $handle );
}
/**
* Enqueues a script.
*
* Registers the script if `$src` provided (does NOT overwrite), and enqueues it.
*
* @see WP_Dependencies::add()
* @see WP_Dependencies::add_data()
* @see WP_Dependencies::enqueue()
*
* @since 2.1.0
* @since 6.3.0 The $in_footer parameter of type boolean was overloaded to be an $args parameter of type array.
* @since 6.9.0 The $fetchpriority parameter of type string was added to the $args parameter of type array.
*
* @param string $handle Name of the script. Should be unique.
* @param string $src Full URL of the script, or path of the script relative to the WordPress root directory.
* Default empty.
* @param string[] $deps Optional. An array of registered script handles this script depends on. Default empty array.
* @param string|bool|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
* as a query string for cache busting purposes. If version is set to false, a version
* number is automatically added equal to current installed WordPress version.
* If set to null, no version is added.
* @param array|bool $args {
* Optional. An array of additional script loading strategies. Default empty array.
* Otherwise, it may be a boolean in which case it determines whether the script is printed in the footer. Default false.
*
* @type string $strategy Optional. If provided, may be either 'defer' or 'async'.
* @type bool $in_footer Optional. Whether to print the script in the footer. Default 'false'.
* @type string $fetchpriority Optional. The fetch priority for the script. Default 'auto'.
* }
*/
function wp_enqueue_script( $handle, $src = '', $deps = array(), $ver = false, $args = array() ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
$wp_scripts = wp_scripts();
if ( $src || ! empty( $args ) ) {
$_handle = explode( '?', $handle );
if ( ! is_array( $args ) ) {
$args = array(
'in_footer' => (bool) $args,
);
}
if ( $src ) {
$wp_scripts->add( $_handle[0], $src, $deps, $ver );
}
if ( ! empty( $args['in_footer'] ) ) {
$wp_scripts->add_data( $_handle[0], 'group', 1 );
}
if ( ! empty( $args['strategy'] ) ) {
$wp_scripts->add_data( $_handle[0], 'strategy', $args['strategy'] );
}
if ( ! empty( $args['fetchpriority'] ) ) {
$wp_scripts->add_data( $_handle[0], 'fetchpriority', $args['fetchpriority'] );
}
}
$wp_scripts->enqueue( $handle );
}
/**
* Removes 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__, $handle );
wp_scripts()->dequeue( $handle );
}
/**
* Determines whether a script has been added to the queue.
*
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
*
* @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 $status Optional. Status of the script to check. Default 'enqueued'.
* Accepts 'enqueued', 'registered', 'queue', 'to_do', and 'done'.
* @return bool Whether the script is queued.
*/
function wp_script_is( $handle, $status = 'enqueued' ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
return (bool) wp_scripts()->query( $handle, $status );
}
/**
* Adds metadata to a script.
*
* Works only if the script has already been registered.
*
* Possible values for $key and $value:
* 'strategy' string 'defer' or 'async'.
*
* @since 4.2.0
* @since 6.9.0 Updated possible values to remove reference to 'conditional' and add 'strategy'.
*
* @see WP_Dependencies::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 );
}