261 lines
6.4 KiB
PHP
261 lines
6.4 KiB
PHP
<?php
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/**
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* Google_Fonts feature class.
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*
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* @package Divi
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* @subpackage Builder
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* @since 4.10.0
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*/
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/**
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* Handles Google_Fonts feature.
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*
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* @since 4.10.0
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*/
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class ET_Builder_Google_Fonts_Feature extends ET_Builder_Global_Feature_Base {
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/**
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* `ET_Builder_Google_Fonts_Feature` instance.
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*
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* @var ET_Builder_Google_Fonts_Feature
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*/
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private static $_instance;
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const CACHE_META_KEY = '_et_builder_gf_feature_cache';
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/**
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* Returns instance of the class.
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*
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* @since 4.10.0
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*/
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public function __construct() {
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// need to set this filter up front, bc as soon as the parent __construct
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// is called then it will prime the cache so it needs
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// this cache index filter to be setup right away.
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add_filter( 'et_global_feature_cache_index_items', [ 'ET_Builder_Google_Fonts_Feature', 'cache_index_items' ], 10, 2 );
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parent::__construct();
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if ( self::enabled() ) {
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self::setup_transient();
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}
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}
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/**
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* Initialize ET_Builder_Google_Fonts_Feature class.
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*/
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public static function instance() {
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if ( ! self::$_instance ) {
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self::$_instance = new self();
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}
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return self::$_instance;
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}
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/**
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* Setup transient to purge cache once a day.
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*
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* @since 4.10.0
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*/
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public static function setup_transient() {
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if ( ! get_transient( self::CACHE_META_KEY ) ) {
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self::purge_cache();
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set_transient( self::CACHE_META_KEY, '1', DAY_IN_SECONDS );
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}
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}
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/**
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* Add to cache index items.
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*
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* @since 4.10.0
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*
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* @param array $items Assoc array of cache index items.
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* @param string $key The cache meta key that the cache index items belong to.
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*
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* @return array $items Assoc array of cache index items.
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*/
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public static function cache_index_items( $items, $key ) {
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global $shortname;
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if ( self::CACHE_META_KEY === $key ) {
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$items['enable_all_character_sets'] = (string) et_get_option( "{$shortname}_gf_enable_all_character_sets", 'false' );
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}
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return $items;
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}
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/**
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* Determines if an option is enabled.
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*
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* @since 4.10.0
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*
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* @param string $sub_option Google Fonts Sub Option.
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*
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* @return bool Whether the sub option is enabled.
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*/
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public function is_option_enabled( $sub_option = '' ) {
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global $shortname;
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if ( ! self::enabled() ) {
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return false;
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}
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if ( et_is_builder_plugin_active() ) {
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$options = get_option( 'et_pb_builder_options', array() );
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$option_state = isset( $options[ 'performance_main_' . $sub_option ] ) ? $options[ 'performance_main_' . $sub_option ] : 'on';
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} else {
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$option_state = et_get_option( $shortname . '_' . $sub_option, 'on' );
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}
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/**
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* Filters the option state before it's returned.
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* Allows other plugins to enable or disable a Google Font feature from code.
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*
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* @since 4.19.1
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*
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* @param bool $is_enabled Whether the sub option is enabled.
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* @param string $sub_option Google Fonts sub option.
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*/
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return apply_filters( 'et_builder_google_fonts_is_enabled', 'on' === $option_state, $sub_option );
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}
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/**
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* Builds the full URL to the Google Font css file to load the fonts
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* provided by the parameter.
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*
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* @since 4.19.1
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*
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* @param array $google_fonts_url_args An array containing query-parameters.
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*
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* @return string The full URL to the Google Fonts resource.
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*/
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public function get_google_fonts_url( $google_fonts_url_args ) {
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$url = add_query_arg( $google_fonts_url_args, 'https://fonts.googleapis.com/css' );
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$url = esc_url_raw( $url );
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/**
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* Filters the URL of the requested Google Font CSS file.
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* Allows swapping Google Fonts with other font sources.
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*
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* @since 4.19.1
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*
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* @param string $url The URL to the Google Fonts CSS file to fetch.
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*/
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return apply_filters( 'et_builder_google_fonts_get_url', $url );
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}
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/**
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* Get User Agents.
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*
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* @since 4.10.0
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*
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* @return array[string] List of user agents.
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*/
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protected function _get_user_agents() {
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$limit_support = $this->is_option_enabled( 'limit_google_fonts_support_for_legacy_browsers' );
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$uas = [];
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if ( ! $limit_support ) {
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/**
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* IE9 Compat Modes
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*/
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$uas['eot'] = 'Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)';
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/**
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* Legacy iOS
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*/
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$uas['svg'] = 'Mozilla/4.0 (iPad; CPU OS 4_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/4.1 Mobile/9A405 Safari/7534.48.3';
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}
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/**
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* Safari, Android, iOS
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*/
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$uas['ttf'] = 'Mozilla/5.0 (Unknown; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Safari/538.1 Daum/4.1';
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/**
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* Modern Browsers.
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* Chrome 6+, Firefox 3.6+, IE 9+, Safari 5.1+
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*/
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$uas['woff'] = 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0';
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/**
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* Super Modern Browsers.
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* hrome 26+, Opera 23+, Firefox 39+
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*/
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$uas['woff2'] = 'Mozilla/5.0 (Windows NT 6.3; rv:39.0) Gecko/20100101 Firefox/39.0';
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/**
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* Filters which user agents to use to get google fonts.
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*
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* @since 4.10.0
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*/
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return apply_filters( 'et_builder_google_fonts_user_agents', $uas );
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}
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/**
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* Fetch CSS file contents from google fonts URL.
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*
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* @since 4.10.0
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*
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* @param string $url The Google Fonts URL to fetch the contents for.
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*
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* @return string $url CSS file contents.
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*/
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public function fetch( $url ) {
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$all_contents = '/* Original: ' . esc_url( $url ) . ' */';
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foreach ( $this->_get_user_agents() as $ua ) {
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$response = wp_remote_get(
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esc_url_raw( $url ),
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[
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'user-agent' => $ua,
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]
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);
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// Return if there is no response or if there is an error.
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if ( ! is_array( $response ) || is_wp_error( $response ) ) {
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return false;
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}
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$contents = wp_remote_retrieve_body( $response );
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$contents = '/* User Agent: ' . $ua . ' */' . "\n" . $contents;
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$all_contents .= "\n\n" . $contents;
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}
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/**
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* Filter the unminified CSS file contents after loading it from Googles servers.
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*
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* @since 4.19.1
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*
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* @param string $all_contents The concatenated CSS files content that was fetched from Google.
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* @param string $url The Google Fonts URL that was fetched.
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*/
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$all_contents = apply_filters( 'et_builder_google_fonts_fetch_content', $all_contents, $url );
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$all_contents = self::minify( $all_contents );
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return $all_contents;
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}
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/**
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* Minify CSS string.
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*
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* @since 4.10.0
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*
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* @param string $data Multiline CSS data.
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*
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* @return string Minifed CSS data.
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*/
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public static function minify( $data ) {
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$data = trim( $data );
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$data = preg_replace( '/\n/smi', '', $data );
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$data = preg_replace( '/\s\s/smi', '', $data );
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return $data;
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}
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}
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