Viewing File: /home/fshjisk/zrparis/wp-content/themes/Avada/includes/lib/inc/class-fusion-fa-font-downloader.php
<?php
/**
* Downloads Font Awesome font locally and generates the @font-face CSS for them.
* The main reasons for this is the GDPR & performance.
*
* @package Fusion Library
* @since 1.8
*/
/**
* Downloads Font Awesome font locally and generates the @font-face CSS for them.
*
* @since 1.8
*/
class Fusion_FA_Font_Downloader {
/**
* The subset.
*
* @access protected
* @since 1.8
* @var string
*/
protected $subset;
/**
* The name of the folder where files for this font are stored.
*
* @access protected
* @since 1.8
* @var string
*/
protected $folder_name = 'fusion-fa-font';
/**
* The URL where files for this font are stored.
*
* @access protected
* @since 1.8
* @var string
*/
protected $folder_url;
/**
* Constructor.
*
* @access public
* @since 1.8
* @param string $subset The Font Awesome subset we're dealing with.
*/
public function __construct( $subset ) {
$this->subset = $subset;
$this->folder_url = Fusion_Downloader::get_root_url( $this->folder_name );
$this->font = $this->get_font_family();
}
/**
* Gets the @font-face CSS for all variants this font-family contains.
*
* @access public
* @since 1.8
* @param array $variants The variants we want to get.
* @return string
*/
public function get_fontface_css( $variants = [] ) {
if ( ! $this->font ) {
return;
}
$font_face = '';
// If $variants is empty then use all variants available.
if ( empty( $variants ) ) {
$variants = $this->font['variants'];
}
// Download files.
$this->download_font_family( $variants );
// Create the @font-face CSS.
foreach ( $variants as $variant ) {
$font_face .= $this->get_variant_fontface_css( $variant );
}
return $font_face;
}
/**
* Gets the preload tags for all variants this font-family contains.
*
* @access public
* @since 3.2
* @param array $variants The variants we want to get.
* @return string
*/
public function get_preload_tags( $variants = [] ) {
if ( ! $this->font ) {
return;
}
$tags = '';
// If $variants is empty then use all variants available.
if ( empty( $variants ) ) {
$variants = $this->font['variants'];
}
// Download files.
$this->download_font_family( $variants );
// Create the tag.
foreach ( $variants as $variant ) {
$tags .= $this->get_variant_preload_tag( $variant );
}
return $tags;
}
/**
* Get the @font-face CSS for a specific variant in this font-family.
*
* @access public
* @since 1.8
* @param string $variant The variant.
* @return string
*/
public function get_variant_fontface_css( $variant ) {
$font_face = "@font-face{font-family:'" . $this->font['family'] . "';";
// Set font style.
$font_face .= 'font-style:normal;';
// Get the font-weight.
$font_face .= "font-weight:{$variant};";
// Get the font-url.
$font_url = str_replace( [ 'http://', 'https://' ], '//', $this->get_variant_local_url( $variant ) );
// Get the font-format.
$font_face .= "src: url('{$font_url}') format('woff');}";
if ( 'fas' === $this->subset ) {
$font_face .= '.fa,';
}
$font_face .= '.' . $this->subset . "{font-family:'" . $this->font['family'] . "';font-weight:" . $variant . '}';
return $font_face;
}
/**
* Get the preload tag for a specific variant in this font-family.
*
* @access public
* @since 3.2
* @param string $variant The variant.
* @return string
*/
public function get_variant_preload_tag( $variant ) {
$font_url = str_replace( [ 'http://', 'https://' ], '//', $this->get_variant_local_url( $variant ) );
$tag = '<link rel="preload" href="' . $font_url . '" as="font" type="font/woff2" crossorigin>';
return $tag;
}
/**
* Gets the local URL for a variant.
*
* @access public
* @since 1.8
* @param string $variant The variant.
* @return string The URL.
*/
public function get_variant_local_url( $variant ) {
$local_urls = $this->get_font_files_urls_local();
if ( empty( $local_urls ) ) {
return;
}
// Return the specific variant if we can find it.
if ( isset( $local_urls[ $variant ] ) ) {
return $local_urls[ $variant ];
}
// Return regular if the one we want could not be found.
if ( isset( $local_urls['regular'] ) ) {
return $local_urls['regular'];
}
// Return the first available if all else failed.
$vals = array_values( $local_urls );
return $vals[0];
}
/**
* Get an array of font-files.
* Only contains the filenames.
*
* @access public
* @since 1.8
* @return array
*/
public function get_font_files() {
$files = [];
$remote_urls = $this->get_font_files_urls_remote();
foreach ( $remote_urls as $key => $url ) {
$files[ $key ] = Fusion_Downloader::get_filename_from_url( $url );
}
return $files;
}
/**
* Get the remote URLs for the font-files.
*
* @access public
* @since 1.8
* @return array
*/
public function get_font_files_urls_remote() {
if ( isset( $this->font['files'] ) ) {
return $this->font['files'];
}
return [];
}
/**
* Get an array of local file URLs.
*
* @access public
* @since 1.8
* @return array
*/
public function get_font_files_urls_local() {
$urls = [];
$files = $this->get_font_files();
foreach ( $files as $key => $file ) {
$urls[ $key ] = $this->folder_url . '/' . $file;
}
return $urls;
}
/**
* Returns the $wp_filesystem global.
*
* @access private
* @since 1.8
* @return WP_Filesystem
*/
private function filesystem() {
return Fusion_Helper::init_filesystem();
}
/**
* Get a font-family from the array of google-fonts.
*
* @access public
* @since 1.8
* @return array
*/
public function get_font_family() {
$fonts = [
'fab' => [
'family' => 'Font Awesome 5 Brands',
'variants' => [ 'normal' ],
'files' => [
'normal' => 'https://pro.fontawesome.com/releases/v' . Fusion_Font_Awesome::$fa_version . '/webfonts/fa-brands-400.woff',
],
],
'fal' => [
'family' => 'Font Awesome 5 Pro',
'variants' => [ '300' ],
'files' => [
'300' => 'https://pro.fontawesome.com/releases/v' . Fusion_Font_Awesome::$fa_version . '/webfonts/fa-light-300.woff',
],
],
'fas' => [
'family' => 'Font Awesome 5 Pro',
'variants' => [ '900' ],
'files' => [
'900' => 'https://pro.fontawesome.com/releases/v' . Fusion_Font_Awesome::$fa_version . '/webfonts/fa-solid-900.woff',
],
],
'far' => [
'family' => 'Font Awesome 5 Pro',
'variants' => [ '400' ],
'files' => [
'400' => 'https://pro.fontawesome.com/releases/v' . Fusion_Font_Awesome::$fa_version . '/webfonts/fa-regular-400.woff',
],
],
];
return isset( $fonts[ $this->subset ] ) ? $fonts[ $this->subset ] : [];
}
/**
* Download font-family files.
*
* @access public
* @since 1.8
* @param array $variants An array of variants to download. Leave empty to download all.
* @return void
*/
public function download_font_family( $variants = [] ) {
if ( isset( $this->font['files'] ) ) {
if ( empty( $variants ) ) {
$variants = $this->font['variants'];
}
foreach ( $this->font['files'] as $variant => $file ) {
if ( in_array( $variant, $variants ) ) { // phpcs:ignore WordPress.PHP.StrictInArray.MissingTrueStrict
$downloader = new Fusion_Downloader( $file, $this->folder_name );
$downloader->download_file();
}
}
}
}
}
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