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<?php |
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/** |
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* WordPress 7.0 compatibility functions for Global Styles. |
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* |
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* Overrides WordPress Core functions to enable full global styles support |
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* (including fonts) for classic themes without theme.json. |
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* |
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* @package gutenberg |
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*/ |
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|
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// Remove WordPress Core's wp_print_font_faces action. |
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remove_action( 'wp_head', 'wp_print_font_faces', 50 ); |
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|
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/** |
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* Gets font-face styles CSS for fonts from Gutenberg's global styles. |
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* |
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* WordPress Core's wp_print_font_faces() relies on wp_get_global_settings() |
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* which excludes custom origin for classic themes. This function uses |
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* Gutenberg's settings resolver to include user-customized fonts. |
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* |
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* @since Gutenberg 20.0.0 |
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* @return string Font-face CSS. |
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*/ |
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function gutenberg_get_font_face_styles() { |
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// Get settings using Gutenberg's resolver with custom origin. |
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$settings = gutenberg_get_global_settings(); |
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|
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// Bail out early if there are no font settings. |
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if ( empty( $settings['typography']['fontFamilies'] ) ) { |
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return ''; |
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} |
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|
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// Parse fonts from settings. |
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$fonts = array(); |
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foreach ( $settings['typography']['fontFamilies'] as $font_families ) { |
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foreach ( $font_families as $definition ) { |
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// Skip if "fontFace" is not defined, meaning there are no variations. |
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if ( empty( $definition['fontFace'] ) ) { |
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continue; |
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} |
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|
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// Skip if "fontFamily" is not defined. |
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if ( empty( $definition['fontFamily'] ) ) { |
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continue; |
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} |
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|
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$font_family_name = $definition['fontFamily']; |
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// Parse font-family name from comma-separated lists. |
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if ( str_contains( $font_family_name, ',' ) ) { |
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$font_family_name = explode( ',', $font_family_name )[0]; |
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} |
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$font_family_name = trim( $font_family_name, "\"'" ); |
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|
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// Skip if no font family is defined. |
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if ( empty( $font_family_name ) ) { |
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continue; |
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} |
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|
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// Convert font face properties. |
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$converted_font_faces = array(); |
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foreach ( $definition['fontFace'] as $font_face ) { |
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// Add the font-family property to the font-face. |
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$font_face['font-family'] = $font_family_name; |
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|
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// Convert relative font URLs to absolute theme URLs. |
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if ( ! empty( $font_face['src'] ) ) { |
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$src = (array) $font_face['src']; |
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$placeholder = 'file:./'; |
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|
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foreach ( $src as $src_key => $src_url ) { |
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// Skip if the src doesn't start with the placeholder |
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if ( ! str_starts_with( $src_url, $placeholder ) ) { |
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continue; |
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} |
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|
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$src_file = str_replace( $placeholder, '', $src_url ); |
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$src[ $src_key ] = get_theme_file_uri( $src_file ); |
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} |
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|
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$font_face['src'] = $src; |
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} |
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|
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// Convert camelCase to kebab-case. |
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$converted_face = array(); |
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foreach ( $font_face as $key => $value ) { |
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$kebab_case = _wp_to_kebab_case( $key ); |
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$converted_face[ $kebab_case ] = $value; |
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} |
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|
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$converted_font_faces[] = $converted_face; |
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} |
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|
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$fonts[] = $converted_font_faces; |
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} |
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} |
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|
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if ( empty( $fonts ) ) { |
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return ''; |
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} |
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|
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// Use WordPress Core's WP_Font_Face class to generate the CSS. |
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if ( ! class_exists( 'WP_Font_Face' ) ) { |
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return ''; |
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} |
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|
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// WP_Font_Face only has generate_and_print(), so use output buffering to capture. |
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ob_start(); |
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$wp_font_face = new WP_Font_Face(); |
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$wp_font_face->generate_and_print( $fonts ); |
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$css = ob_get_clean(); |
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|
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// Remove the wrapping <style> tags if present, we'll add our own. |
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$css = preg_replace( '/<\/?style[^>]*>/', '', $css ); |
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|
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return trim( $css ); |
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} |
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|
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/** |
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* Prints font-face styles for fonts on the frontend. |
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* |
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* @since Gutenberg 20.0.0 |
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*/ |
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function gutenberg_print_font_faces() { |
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$font_face_styles = gutenberg_get_font_face_styles(); |
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if ( ! empty( $font_face_styles ) ) { |
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printf( "<style id='wp-fonts-local'>\n%s\n</style>\n", $font_face_styles ); |
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} |
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} |
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add_action( 'wp_head', 'gutenberg_print_font_faces', 50 ); |
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|
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/** |
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* Adds font-face styles to block editor settings. |
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* |
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* @since Gutenberg 20.0.0 |
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* |
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* @param array $settings Block editor settings. |
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* @return array Modified settings. |
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*/ |
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function gutenberg_add_font_face_styles_to_editor( $settings ) { |
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$font_face_styles = gutenberg_get_font_face_styles(); |
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|
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if ( ! empty( $font_face_styles ) ) { |
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// Add font faces as a style entry in the editor settings. |
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if ( ! isset( $settings['styles'] ) ) { |
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$settings['styles'] = array(); |
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} |
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|
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// Insert font faces at the beginning so they load before other styles. |
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array_unshift( |
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$settings['styles'], |
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array( |
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'css' => $font_face_styles, |
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'__unstableType' => 'font-faces', |
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'isGlobalStyles' => false, |
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) |
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); |
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} |
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|
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return $settings; |
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} |
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// Run after gutenberg_get_block_editor_settings() which runs at priority 0. |
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add_filter( 'block_editor_settings_all', 'gutenberg_add_font_face_styles_to_editor', 5 ); |
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|
