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| 1 | <?php |
| 2 | /** |
| 3 | * Jetpack_Google_Font_Face class |
| 4 | * |
| 5 | * @package automattic/jetpack |
| 6 | */ |
| 7 | |
| 8 | /** |
| 9 | * Prints used legacy catalogue faces while native font printers handle theme and user fonts. |
| 10 | * |
| 11 | * @phan-constructor-used-for-side-effects |
| 12 | */ |
| 13 | class Jetpack_Google_Font_Face { |
| 14 | /** |
| 15 | * The fonts that are used in global styles or block-level settings. |
| 16 | * |
| 17 | * @var array |
| 18 | */ |
| 19 | private $fonts_in_use = array(); |
| 20 | |
| 21 | /** |
| 22 | * The constructor. |
| 23 | */ |
| 24 | public function __construct() { |
| 25 | // Retire the legacy printer while keeping native font-face printing. |
| 26 | add_action( 'wp_loaded', array( $this, 'wp_loaded' ) ); |
| 27 | add_action( 'current_screen', array( $this, 'current_screen' ), 10 ); |
| 28 | |
| 29 | // Collect and print fonts in use |
| 30 | if ( wp_is_block_theme() ) { |
| 31 | add_action( 'wp_head', array( $this, 'print_font_faces' ), 50 ); |
| 32 | } else { |
| 33 | // In classic themes wp_head runs before the blocks are processed to collect the block fonts. |
| 34 | add_action( 'wp_footer', array( $this, 'print_font_faces' ), 50 ); |
| 35 | } |
| 36 | add_filter( 'pre_render_block', array( $this, 'collect_block_fonts' ), 10, 2 ); |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Turn off the legacy webfonts printer on the frontend. |
| 41 | */ |
| 42 | public function wp_loaded() { |
| 43 | remove_action( 'wp_head', 'wp_print_fonts', 50 ); |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * Turn off hooks to print fonts on wp-admin, except for GB editor pages. |
| 48 | */ |
| 49 | public function current_screen() { |
| 50 | remove_action( 'admin_print_styles', 'wp_print_fonts', 50 ); |
| 51 | |
| 52 | if ( ! $this->is_block_editor() ) { |
| 53 | remove_action( 'admin_print_styles', 'wp_print_font_faces', 50 ); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Print fonts that are used in global styles or block-level settings. |
| 59 | */ |
| 60 | public function print_font_faces() { |
| 61 | if ( jetpack_google_fonts_load_font_faces() ) { |
| 62 | return; |
| 63 | } |
| 64 | |
| 65 | $this->collect_global_styles_fonts(); |
| 66 | $fonts_in_use = array_fill_keys( $this->fonts_in_use, true ); |
| 67 | if ( empty( $fonts_in_use ) ) { |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | $settings = function_exists( 'gutenberg_get_global_settings' ) |
| 72 | ? gutenberg_get_global_settings() |
| 73 | : wp_get_global_settings(); |
| 74 | $native_slugs = array(); |
| 75 | $native_faces = array(); |
| 76 | foreach ( $settings['typography']['fontFamilies'] ?? array() as $origin => $families ) { |
| 77 | foreach ( $families as $family ) { |
| 78 | if ( 'default' === $origin && empty( $family['fontFace'] ) ) { |
| 79 | continue; |
| 80 | } |
| 81 | if ( empty( $family['fontFamily'] ) ) { |
| 82 | continue; |
| 83 | } |
| 84 | $key = $this->format_font( self::get_font_family_name( $family ) ); |
| 85 | if ( ! empty( $family['slug'] ) ) { |
| 86 | $native_slugs[ $this->format_font( $family['slug'] ) ] = $key; |
| 87 | } |
| 88 | if ( ! empty( $family['fontFace'] ) ) { |
| 89 | foreach ( $family['fontFace'] as $face ) { |
| 90 | $native_faces[ $key ][] = $face; |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | // Presets without their own faces can still refer to a legacy catalogue family. |
| 97 | $fonts_in_use = array_fill_keys( |
| 98 | array_map( |
| 99 | static function ( $font ) use ( $native_slugs ) { |
| 100 | return $native_slugs[ $font ] ?? $font; |
| 101 | }, |
| 102 | array_keys( $fonts_in_use ) |
| 103 | ), |
| 104 | true |
| 105 | ); |
| 106 | |
| 107 | $data = jetpack_get_google_fonts_data(); |
| 108 | if ( empty( $data['fontFamilies'] ) ) { |
| 109 | return; |
| 110 | } |
| 111 | $available_fonts = jetpack_get_available_google_fonts_map( $data ); |
| 112 | $fonts_to_print = array(); |
| 113 | foreach ( $data['fontFamilies'] as $family ) { |
| 114 | if ( empty( $available_fonts[ $family['name'] ] ) || empty( $family['fontFace'] ) ) { |
| 115 | continue; |
| 116 | } |
| 117 | |
| 118 | $name = self::get_font_family_name( $family ); |
| 119 | $key = $this->format_font( $name ); |
| 120 | $slug = $this->format_font( $family['slug'] ); |
| 121 | // A preset that reuses this slug for another family replaces it. |
| 122 | if ( isset( $native_slugs[ $slug ] ) && $native_slugs[ $slug ] !== $key ) { |
| 123 | continue; |
| 124 | } |
| 125 | if ( ! isset( $fonts_in_use[ $slug ] ) && ! isset( $fonts_in_use[ $key ] ) ) { |
| 126 | continue; |
| 127 | } |
| 128 | |
| 129 | $catalogue_faces = $family['fontFace']; |
| 130 | if ( isset( $native_faces[ $key ] ) ) { |
| 131 | // Native files win; the catalogue only fills styles and weights they lack. |
| 132 | $catalogue_faces = array_filter( |
| 133 | $catalogue_faces, |
| 134 | static function ( $face ) use ( $native_faces, $key ) { |
| 135 | return ! self::is_face_provided( $face, $native_faces[ $key ] ); |
| 136 | } |
| 137 | ); |
| 138 | if ( empty( $catalogue_faces ) ) { |
| 139 | continue; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | $faces = array(); |
| 144 | foreach ( $catalogue_faces as $face ) { |
| 145 | $face['font-family'] = $name; |
| 146 | $converted = array(); |
| 147 | foreach ( $face as $property => $value ) { |
| 148 | $converted[ _wp_to_kebab_case( $property ) ] = $value; |
| 149 | } |
| 150 | $faces[] = $converted; |
| 151 | } |
| 152 | $fonts_to_print[] = $faces; |
| 153 | } |
| 154 | |
| 155 | if ( ! empty( $fonts_to_print ) ) { |
| 156 | wp_print_font_faces( $fonts_to_print ); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Whether a native face already covers a catalogue face's style and weight. |
| 162 | * |
| 163 | * @param array $face Catalogue face. |
| 164 | * @param array[] $native_faces Native faces for the same family. |
| 165 | * @return bool |
| 166 | */ |
| 167 | private static function is_face_provided( $face, $native_faces ) { |
| 168 | $style = $face['fontStyle'] ?? 'normal'; |
| 169 | list( $min, $max ) = self::get_weight_range( $face['fontWeight'] ?? '400' ); |
| 170 | foreach ( $native_faces as $native ) { |
| 171 | if ( ( $native['fontStyle'] ?? 'normal' ) !== $style ) { |
| 172 | continue; |
| 173 | } |
| 174 | list( $native_min, $native_max ) = self::get_weight_range( $native['fontWeight'] ?? '400' ); |
| 175 | // Overlap, not containment: a later catalogue rule would win at a shared weight. |
| 176 | if ( $native_min <= $max && $min <= $native_max ) { |
| 177 | return true; |
| 178 | } |
| 179 | } |
| 180 | return false; |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * Parses a font-weight descriptor such as "400", "bold" or "100 900". |
| 185 | * |
| 186 | * @param string|int $weight Font weight. |
| 187 | * @return int[] Minimum and maximum weight. |
| 188 | */ |
| 189 | private static function get_weight_range( $weight ) { |
| 190 | $weight = str_replace( array( 'normal', 'bold' ), array( '400', '700' ), (string) $weight ); |
| 191 | $parts = preg_split( '/\s+/', trim( $weight ) ); |
| 192 | return array( (int) $parts[0], (int) ( $parts[1] ?? $parts[0] ) ); |
| 193 | } |
| 194 | |
| 195 | /** |
| 196 | * Collect fonts used for global styles settings. |
| 197 | */ |
| 198 | public function collect_global_styles_fonts() { |
| 199 | $global_styles = function_exists( 'gutenberg_get_global_styles' ) |
| 200 | ? gutenberg_get_global_styles() |
| 201 | : wp_get_global_styles(); |
| 202 | |
| 203 | $global_styles_font_slug = $this->get_font_slug_from_setting( $global_styles ); |
| 204 | if ( $global_styles_font_slug ) { |
| 205 | $this->add_font( $global_styles_font_slug ); |
| 206 | } |
| 207 | |
| 208 | if ( isset( $global_styles['blocks'] ) ) { |
| 209 | foreach ( $global_styles['blocks'] as $setting ) { |
| 210 | $font_slug = $this->get_font_slug_from_setting( $setting ); |
| 211 | |
| 212 | if ( $font_slug ) { |
| 213 | $this->add_font( $font_slug ); |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | if ( isset( $global_styles['elements'] ) ) { |
| 219 | foreach ( $global_styles['elements'] as $setting ) { |
| 220 | $font_slug = $this->get_font_slug_from_setting( $setting ); |
| 221 | |
| 222 | if ( $font_slug ) { |
| 223 | $this->add_font( $font_slug ); |
| 224 | } |
| 225 | } |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Collect fonts used for block-level settings. |
| 231 | * |
| 232 | * @filter pre_render_block |
| 233 | * |
| 234 | * @param string|null $content The pre-rendered content. Default null. |
| 235 | * @param array $parsed_block The block being rendered. |
| 236 | */ |
| 237 | public function collect_block_fonts( $content, $parsed_block ) { |
| 238 | if ( ! is_admin() && isset( $parsed_block['attrs']['fontFamily'] ) ) { |
| 239 | $block_font_family = $parsed_block['attrs']['fontFamily']; |
| 240 | $this->add_font( $block_font_family ); |
| 241 | } |
| 242 | |
| 243 | return $content; |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Add the specify font to the fonts_in_use list. |
| 248 | * |
| 249 | * @param string $font_slug The font slug. |
| 250 | */ |
| 251 | public function add_font( $font_slug ) { |
| 252 | if ( is_string( $font_slug ) ) { |
| 253 | $this->fonts_in_use[] = $this->format_font( $font_slug ); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Format the given font slug. |
| 259 | * |
| 260 | * @example "ABeeZee" formats to "abeezee" |
| 261 | * @example "ADLaM Display" formats to "adlam-display" |
| 262 | * @param string $font_slug The font slug. |
| 263 | * @return string The formatted font slug. |
| 264 | */ |
| 265 | public function format_font( $font_slug ) { |
| 266 | return _wp_to_kebab_case( strtolower( $font_slug ) ); |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * Get the font family name from a font. |
| 271 | * |
| 272 | * @param array $font The font definition object. |
| 273 | */ |
| 274 | public static function get_font_family_name( $font ) { |
| 275 | $font_family = $font['fontFamily']; |
| 276 | if ( str_contains( $font_family, ',' ) ) { |
| 277 | $font_family = explode( ',', $font_family )[0]; |
| 278 | } |
| 279 | |
| 280 | return trim( $font_family, "\"'" ); |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * Get the font family slug from a settings array. |
| 285 | * |
| 286 | * @param array $setting The settings object. |
| 287 | * |
| 288 | * @return string|null |
| 289 | */ |
| 290 | public function get_font_slug_from_setting( $setting ) { |
| 291 | if ( ! isset( $setting['typography']['fontFamily'] ) ) { |
| 292 | return null; |
| 293 | } |
| 294 | |
| 295 | $font_family = $setting['typography']['fontFamily']; |
| 296 | |
| 297 | // The font family may be a reference to a path to the value stored at that location, |
| 298 | // e.g.: { "ref": "styles.elements.heading.typography.fontFamily" }. |
| 299 | // Ignore it as we also get the value stored at that location from the setting. |
| 300 | if ( ! is_string( $font_family ) ) { |
| 301 | return null; |
| 302 | } |
| 303 | |
| 304 | // A preset reference can include a var() fallback and a trailing font stack. |
| 305 | preg_match( '/^\s*var\(\s*--wp--preset--font-family--(?P<slug>[^\s,()]+)\s*[,)]/', $font_family, $matches ); |
| 306 | |
| 307 | if ( isset( $matches['slug'] ) ) { |
| 308 | return $matches['slug']; |
| 309 | } |
| 310 | |
| 311 | // Full string: var:preset|font-family|slug |
| 312 | // We do not care about the origin of the font, only its slug. |
| 313 | preg_match( '/^\s*var:preset\|font-family\|(?P<slug>[^\s,]+)/', $font_family, $matches ); |
| 314 | |
| 315 | if ( isset( $matches['slug'] ) ) { |
| 316 | return $matches['slug']; |
| 317 | } |
| 318 | |
| 319 | return self::get_font_family_name( $setting['typography'] ); |
| 320 | } |
| 321 | |
| 322 | /** |
| 323 | * Check if the current screen is the block editor. |
| 324 | * |
| 325 | * @return bool |
| 326 | */ |
| 327 | public function is_block_editor() { |
| 328 | if ( function_exists( 'get_current_screen' ) ) { |
| 329 | $current_screen = get_current_screen(); |
| 330 | if ( ! empty( $current_screen ) && method_exists( $current_screen, 'is_block_editor' ) && $current_screen->is_block_editor() ) { |
| 331 | return true; |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | return false; |
| 336 | } |
| 337 | } |