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<?php
/**
* Google Fonts package Global Styles fonts introspector class file.
*
* @package automattic/jetpack-google-fonts-provider
*/
namespace Automattic\Jetpack\Fonts\Introspectors;
use Automattic\Jetpack\Fonts\Utils;
/**
* Global Styles fonts introspector.
*/
class Global_Styles {
/**
* Enqueue fonts used in global styles settings.
*
* @return void
*/
public static function enqueue_global_styles_fonts() {
if ( is_admin() || ! function_exists( 'wp_enqueue_webfont' ) ) {
return;
}
$global_styles_fonts = self::collect_fonts_from_global_styles();
foreach ( $global_styles_fonts as $font ) {
$font_is_registered = Utils::is_font_family_registered( $font );
if ( $font_is_registered ) {
wp_enqueue_webfont( $font );
}
}
}
/**
* Collect fonts set in Global Styles settings.
*
* @return array Font faces from Global Styles settings.
*/
public static function collect_fonts_from_global_styles() {
if ( ! function_exists( 'gutenberg_get_global_styles' ) ) {
return array();
}
$global_styles = gutenberg_get_global_styles();
$found_webfonts = array();
// Look for fonts in block presets...
if ( isset( $global_styles['blocks'] ) ) {
foreach ( $global_styles['blocks'] as $setting ) {
$font_slug = self::extract_font_slug_from_setting( $setting );
if ( $font_slug ) {
$found_webfonts[] = $font_slug;
}
}
}
// Look for fonts in HTML element presets...
if ( isset( $global_styles['elements'] ) ) {
foreach ( $global_styles['elements'] as $setting ) {
$font_slug = self::extract_font_slug_from_setting( $setting );
if ( $font_slug ) {
$found_webfonts[] = $font_slug;
}
}
}
// Check if a global typography setting was defined.
$font_slug = self::extract_font_slug_from_setting( $global_styles );
if ( $font_slug ) {
$found_webfonts[] = $font_slug;
}
return $found_webfonts;
}
/**
* Extract the font family slug from a settings array.
*
* @param array $setting The settings object.
*
* @return string|null
*/
protected static function extract_font_slug_from_setting( $setting ) {
if ( ! isset( $setting['typography']['fontFamily'] ) ) {
return null;
}
$font_family = $setting['typography']['fontFamily'];
// Full string: var(--wp--preset--font-family--slug).
// We do not care about the origin of the font, only its slug.
preg_match( '/font-family--(?P<slug>.+)\)$/', $font_family, $matches );
if ( isset( $matches['slug'] ) ) {
return $matches['slug'];
}
// Full string: var:preset|font-family|slug
// We do not care about the origin of the font, only its slug.
preg_match( '/font-family\|(?P<slug>.+)$/', $font_family, $matches );
if ( isset( $matches['slug'] ) ) {
return $matches['slug'];
}
return $font_family;
}
}
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