Astra_Minify
Description
Source
File: classes/class-astra-minify.php
class Astra_Minify {
/**
* WordPress Filesystem
*
* @since 1.0
* @access private
* @var bool $_in_customizer_preview
*/
private static $astra_addon_filesystem = null;
/**
* Directory Info
*
* @since 1.0
* @access private
* @var bool $_dir_info
*/
private static $_dir_info = null; // phpcs:ignore PSR2.Classes.PropertyDeclaration.Underscore
/**
* A flag for whether or not we're in a Customizer
* preview or not.
*
* @since 1.0
* @access private
* @var bool $_in_customizer_preview
*/
private static $_in_customizer_preview = false; // phpcs:ignore PSR2.Classes.PropertyDeclaration.Underscore
/**
* The prefix for the option that is stored in the
* database for the cached CSS file key.
*
* @since 1.0
* @access private
* @var string $_css_key
*/
private static $_css_key = 'astra_theme_css_key'; // phpcs:ignore PSR2.Classes.PropertyDeclaration.Underscore
/**
* The prefix for the option that is stored in the
* database for the cached JS file key.
*
* @since 1.0
* @access private
* @var string $_js_key
*/
private static $_js_key = 'astra_theme_js_key'; // phpcs:ignore PSR2.Classes.PropertyDeclaration.Underscore
/**
* Additional CSS to enqueue.
*
* @since 1.0
* @var array $css
*/
private static $css_files = array();
/**
* Additional JS to enqueue.
*
* @since 1.0
* @var array $js
*/
private static $js_files = array();
/**
* Additional dependent JS to enqueue.
*
* @since 1.0
* @var array $js
*/
private static $dependent_js_files = array();
/**
* Instance
*
* @since 1.6.0
*
* @access private
* @var object Class object.
*/
private static $instance;
/**
* Initiator
*
* @since 1.6.0
*
* @return object initialized object of class.
*/
public static function get_instance() {
if ( ! isset( self::$instance ) ) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Construct
*/
public function __construct() {
add_action( 'customize_preview_init', __CLASS__ . '::preview_init', 11 );
add_action( 'customize_save_after', __CLASS__ . '::refresh_assets', 11 );
add_action( 'astra_addon_activated', __CLASS__ . '::refresh_assets', 11 );
add_action( 'astra_addon_deactivated', __CLASS__ . '::refresh_assets', 11 );
add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
if ( version_compare( ASTRA_THEME_VERSION, '3.6.8', '>' ) ) {
add_action( 'astra_get_js_files', array( $this, 'add_fronted_pro_script' ) );
}
}
/**
* Enqueue Scripts
*/
public function enqueue_scripts() {
/**
* Filters to disable all the styles and scripts added from addon.
*
* @since 1.5.0
*
* @param bool true | false enable/disable all styels,scripts of astra addon.
*/
if ( apply_filters( 'astra_addon_enqueue_assets', true ) ) {
$css_url = self::get_css_url();
$js_url = self::get_js_url();
if ( false != $css_url ) {
wp_enqueue_style( 'astra-addon-css', $css_url, array(), ASTRA_EXT_VER, 'all' );
}
// Scripts - Register & Enqueue.
if ( false != $js_url ) {
wp_enqueue_script( 'astra-addon-js', $js_url, self::get_dependent_js(), ASTRA_EXT_VER, true );
}
if ( ! function_exists( 'astra_addon_filesystem' ) ) {
wp_add_inline_style( 'astra-addon-css', apply_filters( 'astra_dynamic_css', '' ) );
}
wp_localize_script( 'astra-addon-js', 'astraAddon', apply_filters( 'astra_addon_js_localize', array() ) );
}
}
/**
* Load WordPress filesystem
*
* @since 1.0
* @return void
*/
public static function load_filesystem() {
if ( null === self::$astra_addon_filesystem ) {
global $wp_filesystem;
if ( empty( $wp_filesystem ) ) {
require_once ABSPATH . '/wp-admin/includes/file.php';
WP_Filesystem();
}
self::$astra_addon_filesystem = $wp_filesystem;
}
}
/**
* Used to add enqueue frontend styles.
*
* @since 1.0
* @param string $src Source URL.
* @param boolean $handle Script handle.
* @return void
*/
public static function add_css( $src = null, $handle = false ) {
if ( false != $handle ) {
self::$css_files[ $handle ] = $src;
} else {
self::$css_files[] = $src;
}
}
/**
* Used to enqueue frontend scripts.
*
* @since 1.0
* @param string $src Source URL.
* @param boolean $handle Script handle.
* @return void
*/
public static function add_js( $src = null, $handle = false ) {
if ( false != $handle ) {
self::$js_files[ $handle ] = $src;
} else {
self::$js_files[] = $src;
}
}
/**
* Used to enqueue dependent js frontend scripts.
*
* @since 1.0
* @param boolean $handle Script handle.
* @param string $src Source URL.
* @return void
*/
public static function add_dependent_js( $handle, $src = null ) {
self::$dependent_js_files[ $handle ] = $src;
}
/**
* Get css files to HTTP/2.
*
* @since 1.0
* @return array()
*/
public static function get_http2_css_files() {
// Get the css key.
$css_slug = self::_asset_slug();
$css_files = get_option( self::$_css_key . '-files-' . $css_slug, array() );
// No css files, recompile the files.
if ( ! $css_files ) {
self::render_http2_css();
return self::get_http2_css_files();
}
// Return the url.
return $css_files;
}
/**
* Get css files to generate.
*
* @since 1.0
* @return array()
*/
public static function get_css_files() {
if ( 1 > count( self::$css_files ) ) {
do_action( 'astra_get_css_files' );
}
return apply_filters( 'astra_add_css_file', self::$css_files );
}
/**
* Get CSS files to HTTP/2.
*
* @since 1.0
* @return array()
*/
public static function get_http2_js_files() {
// Get the js key.
$js_slug = self::_asset_slug();
$js_files = get_option( self::$_js_key . '-files-' . $js_slug, array() );
self::$dependent_js_files = get_option( self::$_js_key . '-dep-' . $js_slug );
// No js files, recompile the js files.
if ( ! $js_files ) {
self::render_http2_js();
return self::get_http2_js_files();
}
// Return the files array().
return $js_files;
}
/**
* Get JS files to generate.
*
* @since 1.0
* @return array()
*/
public static function get_js_files() {
if ( 1 > count( self::$js_files ) ) {
do_action( 'astra_get_js_files' );
}
return apply_filters( 'astra_add_js_file', self::$js_files );
}
/**
* Get dependent JS files to generate.
*
* @since 1.0
* @return array()
*/
public static function get_dependent_js_files() {
return apply_filters( 'astra_add_dependent_js_file', self::$dependent_js_files );
}
/**
* Checks to see if the current site is being accessed over SSL.
*
* @since 1.0
* @return bool
*/
public static function astra_is_ssl() {
if ( is_ssl() ) {
return true;
} elseif ( 0 === stripos( get_option( 'siteurl' ), 'https://' ) ) {
return true;
} elseif ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) && 'https' == $_SERVER['HTTP_X_FORWARDED_PROTO'] ) {
return true;
}
return false;
}
/**
* Returns an array with the path and URL for the cache directory.
*
* @since 1.0
* @return array
*/
public static function get_cache_dir() {
if ( null != self::$_dir_info ) {
return self::$_dir_info;
}
$dir_name = 'astra-addon';
$wp_info = wp_upload_dir();
// SSL workaround.
if ( self::astra_is_ssl() ) {
$wp_info['baseurl'] = str_ireplace( 'http://', 'https://', $wp_info['baseurl'] );
}
// Build the paths.
$dir_info = array(
'path' => $wp_info['basedir'] . '/' . $dir_name . '/',
'url' => $wp_info['baseurl'] . '/' . $dir_name . '/',
);
// Create the cache dir if it doesn't exist.
if ( ! file_exists( $dir_info['path'] ) ) {
wp_mkdir_p( $dir_info['path'] );
}
self::$_dir_info = $dir_info;
return self::$_dir_info;
}
/**
* Checks to see if this is a Customizer preview or not.
*
* @since 1.0
* @return bool
*/
public static function is_customizer_preview() {
return self::$_in_customizer_preview;
}
/**
* Returns the prefix slug for the CSS cache file.
*
* @since 1.0
* @access private
* @return string
*/
private static function _asset_slug() { // phpcs:ignore PSR2.Methods.MethodDeclaration.Underscore
if ( self::is_customizer_preview() ) {
$slug = 'ast-customizer';
} else {
$slug = 'astra-addon';
}
return $slug;
}
/**
* Clears and rebuilds the cached CSS file.
*
* @since 1.0
* @return void
*/
public static function refresh_assets() {
self::clear_assets_cache();
self::render_assets();
do_action( 'astra_addon_assets_refreshed' );
}
/**
* Deletes cached CSS files based on the current
* context (live, preview or customizer) or all if
* $all is set to true.
*
* @since 1.0
* @return boolean Returns True if files were successfull deleted, False If files could not be deleted.
*/
public static function clear_assets_cache() {
// Make sure the filesystem is loaded.
self::load_filesystem();
$dir_name = 'astra-addon';
$cache_dir = self::get_cache_dir();
$asset_slug = self::_asset_slug();
/* Delete CSS Keys */
delete_option( self::$_css_key . '-' . $asset_slug );
delete_option( self::$_css_key . '-files-' . $asset_slug );
/* Delete JS Keys */
delete_option( self::$_js_key . '-' . $asset_slug );
delete_option( self::$_js_key . '-files-' . $asset_slug );
delete_option( self::$_js_key . '-dep-' . $asset_slug );
if ( ! empty( $cache_dir['path'] ) && stristr( $cache_dir['path'], $dir_name ) ) {
$directory = trailingslashit( $cache_dir['path'] );
$filelist = (array) self::$astra_addon_filesystem->dirlist( $directory, true );
$delete_status = true;
foreach ( $filelist as $file ) {
// don't delete dynamic css files.
// @TODO: use Astra_Cache to generate and manage CSS files.
if ( false !== strpos( $file['name'], 'dynamic-css' ) ) {
continue;
}
// Skip astra-addon css/js files if customizer preview. Whenever customizer was refreshed, astra-addon used to regenerate. If HTML cache is enabled on the frontend then just visiting the customizer regenerates the astra-addon assets and gives 404 not found error for astra-addon assets on frontend.
if ( self::is_customizer_preview() && ( false !== strpos( $file['name'], 'astra-addon-' ) ) ) {
continue;
}
$file = $directory . $file['name'];
if ( is_file( $file ) && file_exists( $file ) ) {
$delete_status = self::$astra_addon_filesystem->delete( $file );
}
}
// If the file was not correctly deleted.
if ( false == $delete_status ) {
// Set status CSS status True. This will load the CSS as inline.
update_option( 'ast-theme-css-status', true );
update_option( 'astra-addon-js-status', true );
return false;
}
}
return true;
}
/**
* Renders the CSS and JS assets.
*
* @since 1.0
* @return void
*/
public static function render_assets() {
if ( defined( 'ASTRA_THEME_HTTP2' ) && ASTRA_THEME_HTTP2 ) {
self::render_http2_css();
self::render_http2_js();
} else {
self::render_css();
self::render_js();
}
}
/**
* Returns a URL for the cached CSS file.
*
* @since 1.0
* @return string
*/
public static function get_css_url() {
if ( defined( 'ASTRA_THEME_HTTP2' ) && ASTRA_THEME_HTTP2 ) {
self::enqueue_http2_css();
return false;
} elseif ( ! get_option( 'ast-theme-css-status' ) ) {
// Get the cache dir and css key.
$cache_dir = self::get_cache_dir();
$css_slug = self::_asset_slug();
$css_key = get_option( self::$_css_key . '-' . $css_slug );
$css_path = $cache_dir['path'] . $css_slug . '-' . $css_key . '.css';
$css_url = $cache_dir['url'] . $css_slug . '-' . $css_key . '.css';
if ( ! $css_key ) {
self::render_css();
return self::get_css_url();
}
// Check to see if the file exists.
if ( ! file_exists( $css_path ) ) {
self::render_fallback_css();
return false;
}
// Return the url.
return $css_url;
} else {
self::render_fallback_css();
return false;
}
}
/**
* Returns a HTTP/2 Dynamic CSS data.
*
* @since 1.0
* @return string
*/
public static function get_http2_dynamic_css() {
// Get the css key.
$css_slug = self::_asset_slug();
// No css data, recompile the css.
if ( ! $css_data ) {
self::render_http2_css();
return self::get_http2_dynamic_css();
}
// Return the url.
return $css_data;
}
/**
* Returns a Dynamic CSS data.
*
* @since 1.0
* @return string
*/
public static function get_dynamic_css() {
// Get the cache dir and css key.
$cache_dir = self::get_cache_dir();
$css_slug = self::_asset_slug();
// No css data, recompile the css.
if ( ! $css_data ) {
self::render_css();
return self::get_dynamic_css();
}
// Return the url.
return $css_data;
}
/**
* Returns a URL for the cached JS file.
*
* @since 1.0
* @return string
*/
public static function get_js_url() {
if ( defined( 'ASTRA_THEME_HTTP2' ) && ASTRA_THEME_HTTP2 ) {
self::enqueue_http2_js();
return false;
} elseif ( ! get_option( 'astra-addon-js-status' ) ) {
// Get the cache dir and js key.
$cache_dir = self::get_cache_dir();
$js_slug = self::_asset_slug();
$js_key = get_option( self::$_js_key . '-' . $js_slug );
$js_path = $cache_dir['path'] . $js_slug . '-' . $js_key . '.js';
$js_url = $cache_dir['url'] . $js_slug . '-' . $js_key . '.js';
if ( ! $js_key ) {
self::render_js();
return self::get_js_url();
}
// Get dependent js added from addon modules.
self::$dependent_js_files = get_option( self::$_js_key . '-dep-' . $js_slug );
// Check to see if the file exists.
if ( ! file_exists( $js_path ) ) {
self::render_fallback_js();
return false;
}
// Return the url.
return $js_url;
} else {
self::render_fallback_js();
return false;
}
}
/**
* Enqueue dependent JS
*
* @since 1.0
* @return void
*/
public static function enqueue_dependent_js() {
$dependent_js_files = self::get_dependent_js_files();
if ( count( $dependent_js_files ) > 0 ) {
foreach ( $dependent_js_files as $handle => $src ) {
if ( '' != $src ) {
wp_enqueue_script( $handle, $src, array(), ASTRA_EXT_VER, true );
} else {
wp_enqueue_script( $handle );
}
}
}
}
/**
* Get dependent JS
*
* @since 1.0
* @return array()
*/
public static function get_dependent_js() {
$dependent_js_files = self::get_dependent_js_files();
$js_files_arr = array();
if ( is_array( $dependent_js_files ) && count( $dependent_js_files ) > 0 ) {
foreach ( $dependent_js_files as $handle => $src ) {
if ( '' != $src ) {
wp_register_script( $handle, $src, array(), ASTRA_EXT_VER, true );
$js_files_arr[] = $handle;
} else {
$js_files_arr[] = $handle;
}
}
}
return $js_files_arr;
}
/**
* Compiles the cached CSS file.
*
* @since 1.0
* @access private
* @return void
*/
private static function render_http2_css() {
$css_slug = self::_asset_slug();
$css_files = self::get_css_files();
/* Update Dynamic css in DB */
update_option( self::$_css_key . '-files-' . $css_slug, $css_files );
}
/**
* Compiles the cached CSS file.
*
* @since 1.0
* @access private
* @return void|false Checks early if cache directory was emptied before generating the new files
*/
private static function render_css() {
self::load_filesystem();
if ( ! defined( 'FS_CHMOD_FILE' ) ) {
define( 'FS_CHMOD_FILE', ( fileperms( ABSPATH . 'index.php' ) & 0777 | 0644 ) );
}
if ( get_option( 'ast-theme-css-status' ) ) {
$assets_status = self::clear_assets_cache();
if ( false == $assets_status ) {
return false;
}
}
$cache_dir = self::get_cache_dir();
$new_css_key = str_replace( '.', '-', uniqid( '', true ) );
$css_slug = self::_asset_slug();
$css_files = self::get_css_files();
$css = '';
$css_min = '';
$filepath = $cache_dir['path'] . $css_slug . '-' . $new_css_key . '.css';
if ( count( $css_files ) > 0 ) {
foreach ( $css_files as $k => $file ) {
if ( ! empty( $file ) && file_exists( $file ) ) {
$css .= self::$astra_addon_filesystem->get_contents(
$file,
FS_CHMOD_FILE
);
}
}
}
$css = apply_filters( 'astra_render_css', $css );
$status = self::$astra_addon_filesystem->put_contents(
$filepath,
$css,
FS_CHMOD_FILE
);
$status = ! $status;
// Save the new css key.
update_option( 'ast-theme-css-status', $status );
update_option( self::$_css_key . '-' . $css_slug, $new_css_key );
}
/**
* Render HTTP/2 CSS : enqueue individual CSS file.
*
* @since 1.0
* @access private
* @return void
*/
private static function enqueue_http2_css() {
$css_files = self::get_http2_css_files();
$files_count = count( $css_files );
if ( $files_count > 0 ) {
foreach ( $css_files as $k => $file ) {
if ( $files_count == $k + 1 ) {
$handle = 'astra-addon-css';
} else {
$handle = 'astra-addon-css-' . $k;
}
wp_enqueue_style(
$handle,
$file,
array(),
ASTRA_EXT_VER,
'all'
);
}
}
}
/**
* Fallback to enqueue individual CSS file.
*
* @since 1.0
* @access private
* @return void
*/
private static function render_fallback_css() {
$css_files = self::get_css_files();
$files_count = count( $css_files );
if ( $files_count > 0 ) {
foreach ( $css_files as $index => $file_path ) {
if ( ! file_exists( $file_path ) ) {
continue;
}
$new_file = plugins_url( str_replace( plugin_dir_path( ASTRA_EXT_FILE ), '', $file_path ), ASTRA_EXT_FILE );
if ( $files_count == $index + 1 ) {
$handle = 'astra-addon-css';
} else {
$handle = 'astra-addon-css-' . $index;
}
wp_enqueue_style(
$handle,
$new_file,
array(),
ASTRA_EXT_VER,
'all'
);
}
}
}
/**
* Renders HTTP/2 js.
*
* @since 1.0
* @return void
*/
public static function render_http2_js() {
$js_slug = self::_asset_slug();
$js_files = self::get_js_files();
$dep_js_files = self::$dependent_js_files;
update_option( self::$_js_key . '-files-' . $js_slug, $js_files );
update_option( self::$_js_key . '-dep-' . $js_slug, $dep_js_files );
}
/**
* Renders and caches the JavaScript
*
* @since 1.0
* @return void|false Checks early if cache directory was emptied before generating the new files
*/
public static function render_js() {
self::load_filesystem();
if ( ! defined( 'FS_CHMOD_FILE' ) ) {
define( 'FS_CHMOD_FILE', ( fileperms( ABSPATH . 'index.php' ) & 0777 | 0644 ) );
}
if ( get_option( 'astra-addon-js-status' ) ) {
$assets_status = self::clear_assets_cache();
if ( false == $assets_status ) {
return false;
}
}
$cache_dir = self::get_cache_dir();
$new_js_key = str_replace( '.', '-', uniqid( '', true ) );
$js_slug = self::_asset_slug();
$js_files = self::get_js_files();
$dep_js_files = self::$dependent_js_files;
$js = '';
$js_min = '';
$filepath = $cache_dir['path'] . $js_slug . '-' . $new_js_key . '.js';
if ( count( $js_files ) > 0 ) {
foreach ( $js_files as $k => $file ) {
if ( ! empty( $file ) && file_exists( $file ) ) {
$js .= self::$astra_addon_filesystem->get_contents(
$file,
FS_CHMOD_FILE
);
}
}
}
$js = apply_filters( 'astra_render_js', $js );
$status = self::$astra_addon_filesystem->put_contents(
$filepath,
$js,
FS_CHMOD_FILE
);
$status = ! $status;
// Save the new css key.
update_option( 'astra-addon-js-status', $status );
update_option( self::$_js_key . '-dep-' . $js_slug, $dep_js_files );
update_option( self::$_js_key . '-' . $js_slug, $new_js_key );
do_action( 'astra_after_render_js' );
}
/**
* HTTP/2 individual JS file.
*
* @since 1.0
* @return void
*/
public static function enqueue_http2_js() {
$js_files = self::get_http2_js_files();
$files_count = count( $js_files );
if ( 0 < $files_count ) {
$dep_files = self::get_dependent_js();
if ( ! is_array( $dep_files ) ) {
$dep_files = array();
}
foreach ( $js_files as $k => $file ) {
if ( 0 == $k ) {
$handle = 'astra-addon-js';
} else {
$handle = 'astra-addon-js-' . $k;
}
wp_enqueue_script(
$handle,
$file,
$dep_files,
ASTRA_EXT_VER,
true
);
}
}
}
/**
* Render Fallback JS
*
* @since 1.0
* @return void
*/
public static function render_fallback_js() {
$js_files = self::get_js_files();
$files_count = count( $js_files );
if ( 0 < $files_count ) {
self::enqueue_dependent_js();
foreach ( $js_files as $index => $file_path ) {
if ( ! file_exists( $file_path ) ) {
continue;
}
$new_file = plugins_url( str_replace( plugin_dir_path( ASTRA_EXT_FILE ), '', $file_path ), ASTRA_EXT_FILE );
if ( 0 == $index ) {
$handle = 'astra-addon-js';
} else {
$handle = 'astra-addon-js-' . $index;
}
wp_enqueue_script(
$handle,
$new_file,
array(),
ASTRA_EXT_VER,
true
);
}
}
}
/**
* Called by the customize_preview_init action to initialize
* a Customizer preview.
*
* @since 1.0
* @return void
*/
public static function preview_init() {
self::$_in_customizer_preview = true;
self::refresh_assets();
}
/**
* Trim CSS
*
* @since 1.0
* @param string $css CSS content to trim.
* @return string
*/
public static function trim_css( $css = '' ) {
// Trim white space for faster page loading.
if ( ! empty( $css ) ) {
$css = preg_replace( '!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $css );
$css = str_replace( array( "\r\n", "\r", "\n", "\t", ' ', ' ', ' ' ), '', $css );
$css = str_replace( ', ', ',', $css );
}
return $css;
}
/**
* Load Addon ddependent JS related to toggle navigation menu.
*
* @since 3.5.9
*/
public static function add_fronted_pro_script() {
/* Define Variables */
$uri = ASTRA_EXT_URI . 'assets/js/';
$path = ASTRA_EXT_DIR . 'assets/js/';
/* Directory and Extension */
$file_prefix = '.min';
$dir_name = 'minified';
if ( SCRIPT_DEBUG ) {
$file_prefix = '';
$dir_name = 'unminified';
}
$js_uri = $uri . $dir_name . '/';
$js_dir = $path . $dir_name . '/';
if ( defined( 'ASTRA_THEME_HTTP2' ) && ASTRA_THEME_HTTP2 ) {
$gen_path = $js_uri;
} else {
$gen_path = $js_dir;
}
/*** End Path Logic */
self::add_js( $gen_path . 'frontend-pro' . $file_prefix . '.js' );
}
}
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Methods
- __construct — Construct
- _asset_slug — Returns the prefix slug for the CSS cache file.
- add_css — Used to add enqueue frontend styles.
- add_dependent_js — Used to enqueue dependent js frontend scripts.
- add_fronted_pro_script — Load Addon ddependent JS related to toggle navigation menu.
- add_js — Used to enqueue frontend scripts.
- astra_is_ssl — Checks to see if the current site is being accessed over SSL.
- clear_assets_cache — Deletes cached CSS files based on the current context (live, preview or customizer) or all if $all is set to true.
- enqueue_dependent_js — Enqueue dependent JS
- enqueue_http2_css — Render HTTP/2 CSS : enqueue individual CSS file.
- enqueue_http2_js — HTTP/2 individual JS file.
- enqueue_scripts — Enqueue Scripts
- get_cache_dir — Returns an array with the path and URL for the cache directory.
- get_css_files — Get css files to generate.
- get_css_url — Returns a URL for the cached CSS file.
- get_dependent_js — Get dependent JS
- get_dependent_js_files — Get dependent JS files to generate.
- get_dynamic_css — Returns a Dynamic CSS data.
- get_http2_css_files — Get css files to HTTP/2.
- get_http2_dynamic_css — Returns a HTTP/2 Dynamic CSS data.
- get_http2_js_files — Get CSS files to HTTP/2.
- get_instance — Initiator
- get_js_files — Get JS files to generate.
- get_js_url — Returns a URL for the cached JS file.
- is_customizer_preview — Checks to see if this is a Customizer preview or not.
- load_filesystem — Load WordPress filesystem
- preview_init — Called by the customize_preview_init action to initialize a Customizer preview.
- refresh_assets — Clears and rebuilds the cached CSS file.
- render_assets — Renders the CSS and JS assets.
- render_css — Compiles the cached CSS file.
- render_fallback_css — Fallback to enqueue individual CSS file.
- render_fallback_js — Render Fallback JS
- render_http2_css — Compiles the cached CSS file.
- render_http2_js — Renders HTTP/2 js.
- render_js — Renders and caches the JavaScript
- trim_css — Trim CSS