init

wp-content/themes/flatsome/inc/admin/kirki/modules/webfonts/class-kirki-modules-webfonts-embed.php

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+<?php
+/**
+ * Adds the Webfont Loader to load fonts asyncronously.
+ *
+ * @package     Kirki
+ * @category    Core
+ * @author      Ari Stathopoulos (@aristath)
+ * @copyright   Copyright (c) 2020, David Vongries
+ * @license     https://opensource.org/licenses/MIT
+ * @since       3.0
+ */
+
+/**
+ * Manages the way Google Fonts are enqueued.
+ */
+final class Kirki_Modules_Webfonts_Embed {
+
+	/**
+	 * The config ID.
+	 *
+	 * @access protected
+	 * @since 3.0.0
+	 * @var string
+	 */
+	protected $config_id;
+
+	/**
+	 * The Kirki_Modules_Webfonts object.
+	 *
+	 * @access protected
+	 * @since 3.0.0
+	 * @var object
+	 */
+	protected $webfonts;
+
+	/**
+	 * The Kirki_Fonts_Google object.
+	 *
+	 * @access protected
+	 * @since 3.0.0
+	 * @var object
+	 */
+	protected $googlefonts;
+
+	/**
+	 * Fonts to load.
+	 *
+	 * @access protected
+	 * @since 3.0.26
+	 * @var array
+	 */
+	protected $fonts_to_load = array();
+
+	/**
+	 * Constructor.
+	 *
+	 * @access public
+	 * @since 3.0
+	 * @param string $config_id   The config-ID.
+	 * @param object $webfonts    The Kirki_Modules_Webfonts object.
+	 * @param object $googlefonts The Kirki_Fonts_Google object.
+	 * @param array  $args        Extra args we want to pass.
+	 */
+	public function __construct( $config_id, $webfonts, $googlefonts, $args = array() ) {
+		$this->config_id   = $config_id;
+		$this->webfonts    = $webfonts;
+		$this->googlefonts = $googlefonts;
+
+		add_action( 'wp', array( $this, 'init' ), 9 );
+		add_filter( 'wp_resource_hints', array( $this, 'resource_hints' ), 10, 2 );
+	}
+
+	/**
+	 * Init.
+	 *
+	 * @access public
+	 * @since 3.0.36
+	 * @return void
+	 */
+	public function init() {
+		$this->populate_fonts();
+		add_action( 'kirki_dynamic_css', array( $this, 'the_css' ) );
+	}
+
+	/**
+	 * Add preconnect for Google Fonts.
+	 *
+	 * @access public
+	 * @param array  $urls           URLs to print for resource hints.
+	 * @param string $relation_type  The relation type the URLs are printed.
+	 * @return array $urls           URLs to print for resource hints.
+	 */
+	public function resource_hints( $urls, $relation_type ) {
+		$fonts_to_load = $this->googlefonts->fonts;
+
+		if ( ! empty( $fonts_to_load ) && 'preconnect' === $relation_type ) {
+			$urls[] = array(
+				'href' => 'https://fonts.gstatic.com',
+				'crossorigin',
+			);
+		}
+		return $urls;
+	}
+
+	/**
+	 * Webfont Loader for Google Fonts.
+	 *
+	 * @access public
+	 * @since 3.0.0
+	 */
+	public function populate_fonts() {
+
+		// Go through our fields and populate $this->fonts.
+		$this->webfonts->loop_fields( $this->config_id );
+
+		$this->googlefonts->fonts = apply_filters( 'kirki_enqueue_google_fonts', $this->googlefonts->fonts );
+
+		// Goes through $this->fonts and adds or removes things as needed.
+		$this->googlefonts->process_fonts();
+
+		foreach ( $this->googlefonts->fonts as $font => $weights ) {
+			foreach ( $weights as $key => $value ) {
+				if ( 'italic' === $value ) {
+					$weights[ $key ] = '400i';
+				} else {
+					$weights[ $key ] = str_replace( array( 'regular', 'bold', 'italic' ), array( '400', '', 'i' ), $value );
+				}
+			}
+			$this->fonts_to_load[] = array(
+				'family'  => $font,
+				'weights' => $weights,
+			);
+		}
+	}
+
+	/**
+	 * Webfont Loader script for Google Fonts.
+	 *
+	 * @access public
+	 * @since 3.0.0
+	 */
+	public function the_css() {
+		foreach ( $this->fonts_to_load as $font ) {
+			$family  = str_replace( ' ', '+', trim( $font['family'] ) );
+			$weights = join( ',', $font['weights'] );
+			$url     = "https://fonts.googleapis.com/css?family={$family}:{$weights}&subset=cyrillic,cyrillic-ext,devanagari,greek,greek-ext,khmer,latin,latin-ext,vietnamese,hebrew,arabic,bengali,gujarati,tamil,telugu,thai&display=swap";
+
+			$transient_id = 'kirki_gfonts_' . md5( $url );
+			$contents     = get_transient( $transient_id );
+
+			if ( ! class_exists( 'Kirki_Fonts_Downloader' ) ) {
+				include_once wp_normalize_path( dirname( __FILE__ ) . '/class-kirki-fonts-downloader.php' ); // phpcs:ignore WPThemeReview.CoreFunctionality.FileInclude
+			}
+			$downloader = new Kirki_Fonts_Downloader();
+			$contents   = $downloader->get_styles( $url );
+
+			if ( $contents ) {
+				/**
+				 * Note to code reviewers:
+				 *
+				 * Though all output should be run through an escaping function, this is pure CSS
+				 * and it is added on a call that has a PHP `header( 'Content-type: text/css' );`.
+				 * No code, script or anything else can be executed from inside a stylesheet.
+				 * For extra security we're using the wp_strip_all_tags() function here
+				 * just to make sure there's no <script> tags in there or anything else.
+				 */
+				echo wp_strip_all_tags( $contents ); // phpcs:ignore WordPress.Security.EscapeOutput
+			}
+		}
+	}
+}