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1 <?php 2 /** 3 * APIs to interact with global settings & styles. 4 * 5 * @package WordPress 6 */ 7 8 /** 9 * Gets the settings resulting of merging core, theme, and user data. 10 * 11 * @since 5.9.0 12 * 13 * @param array $path Path to the specific setting to retrieve. Optional. 14 * If empty, will return all settings. 15 * @param array $context { 16 * Metadata to know where to retrieve the $path from. Optional. 17 * 18 * @type string $block_name Which block to retrieve the settings from. 19 * If empty, it'll return the settings for the global context. 20 * @type string $origin Which origin to take data from. 21 * Valid values are 'all' (core, theme, and user) or 'base' (core and theme). 22 * If empty or unknown, 'all' is used. 23 * } 24 * @return mixed The settings array or individual setting value to retrieve. 25 */ 26 function wp_get_global_settings( $path = array(), $context = array() ) { 27 if ( ! empty( $context['block_name'] ) ) { 28 $new_path = array( 'blocks', $context['block_name'] ); 29 foreach ( $path as $subpath ) { 30 $new_path[] = $subpath; 31 } 32 $path = $new_path; 33 } 34 35 /* 36 * This is the default value when no origin is provided or when it is 'all'. 37 * 38 * The $origin is used as part of the cache key. Changes here need to account 39 * for clearing the cache appropriately. 40 */ 41 $origin = 'custom'; 42 if ( 43 ! wp_theme_has_theme_json() || 44 ( isset( $context['origin'] ) && 'base' === $context['origin'] ) 45 ) { 46 $origin = 'theme'; 47 } 48 49 /* 50 * By using the 'theme_json' group, this data is marked to be non-persistent across requests. 51 * See `wp_cache_add_non_persistent_groups` in src/wp-includes/load.php and other places. 52 * 53 * The rationale for this is to make sure derived data from theme.json 54 * is always fresh from the potential modifications done via hooks 55 * that can use dynamic data (modify the stylesheet depending on some option, 56 * settings depending on user permissions, etc.). 57 * See some of the existing hooks to modify theme.json behavior: 58 * https://make.wordpress.org/core/2022/10/10/filters-for-theme-json-data/ 59 * 60 * A different alternative considered was to invalidate the cache upon certain 61 * events such as options add/update/delete, user meta, etc. 62 * It was judged not enough, hence this approach. 63 * See https://github.com/WordPress/gutenberg/pull/45372 64 */ 65 $cache_group = 'theme_json'; 66 $cache_key = 'wp_get_global_settings_' . $origin; 67 68 /* 69 * Ignore cache when the development mode is set to 'theme', so it doesn't interfere with the theme 70 * developer's workflow. 71 */ 72 $can_use_cached = ! wp_is_development_mode( 'theme' ); 73 74 $settings = false; 75 if ( $can_use_cached ) { 76 $settings = wp_cache_get( $cache_key, $cache_group ); 77 } 78 79 if ( false === $settings ) { 80 $settings = WP_Theme_JSON_Resolver::get_merged_data( $origin )->get_settings(); 81 if ( $can_use_cached ) { 82 wp_cache_set( $cache_key, $settings, $cache_group ); 83 } 84 } 85 86 return _wp_array_get( $settings, $path, $settings ); 87 } 88 89 /** 90 * Gets the styles resulting of merging core, theme, and user data. 91 * 92 * @since 5.9.0 93 * @since 6.3.0 the internal link format "var:preset|color|secondary" is resolved 94 * to "var(--wp--preset--font-size--small)" so consumers don't have to. 95 * @since 6.3.0 `transforms` is now usable in the `context` parameter. In case [`transforms`]['resolve_variables'] 96 * is defined, variables are resolved to their value in the styles. 97 * 98 * @param array $path Path to the specific style to retrieve. Optional. 99 * If empty, will return all styles. 100 * @param array $context { 101 * Metadata to know where to retrieve the $path from. Optional. 102 * 103 * @type string $block_name Which block to retrieve the styles from. 104 * If empty, it'll return the styles for the global context. 105 * @type string $origin Which origin to take data from. 106 * Valid values are 'all' (core, theme, and user) or 'base' (core and theme). 107 * If empty or unknown, 'all' is used. 108 * @type array $transforms Which transformation(s) to apply. 109 * Valid value is array( 'resolve-variables' ). 110 * If defined, variables are resolved to their value in the styles. 111 * } 112 * @return mixed The styles array or individual style value to retrieve. 113 */ 114 function wp_get_global_styles( $path = array(), $context = array() ) { 115 if ( ! empty( $context['block_name'] ) ) { 116 $path = array_merge( array( 'blocks', $context['block_name'] ), $path ); 117 } 118 119 $origin = 'custom'; 120 if ( isset( $context['origin'] ) && 'base' === $context['origin'] ) { 121 $origin = 'theme'; 122 } 123 124 $resolve_variables = isset( $context['transforms'] ) 125 && is_array( $context['transforms'] ) 126 && in_array( 'resolve-variables', $context['transforms'], true ); 127 128 $merged_data = WP_Theme_JSON_Resolver::get_merged_data( $origin ); 129 if ( $resolve_variables ) { 130 $merged_data = WP_Theme_JSON::resolve_variables( $merged_data ); 131 } 132 $styles = $merged_data->get_raw_data()['styles']; 133 return _wp_array_get( $styles, $path, $styles ); 134 } 135 136 137 /** 138 * Returns the stylesheet resulting of merging core, theme, and user data. 139 * 140 * @since 5.9.0 141 * @since 6.1.0 Added 'base-layout-styles' support. 142 * @since 6.6.0 Resolves relative paths in theme.json styles to theme absolute paths. 143 * 144 * @param array $types Optional. Types of styles to load. 145 * See {@see 'WP_Theme_JSON::get_stylesheet'} for all valid types. 146 * If empty, it'll load the following: 147 * - for themes without theme.json: 'variables', 'presets', 'base-layout-styles'. 148 * - for themes with theme.json: 'variables', 'presets', 'styles'. 149 * @return string Stylesheet. 150 */ 151 function wp_get_global_stylesheet( $types = array() ) { 152 /* 153 * Ignore cache when the development mode is set to 'theme', so it doesn't interfere with the theme 154 * developer's workflow. 155 */ 156 $can_use_cached = empty( $types ) && ! wp_is_development_mode( 'theme' ); 157 158 /* 159 * By using the 'theme_json' group, this data is marked to be non-persistent across requests. 160 * @see `wp_cache_add_non_persistent_groups()`. 161 * 162 * The rationale for this is to make sure derived data from theme.json 163 * is always fresh from the potential modifications done via hooks 164 * that can use dynamic data (modify the stylesheet depending on some option, 165 * settings depending on user permissions, etc.). 166 * See some of the existing hooks to modify theme.json behavior: 167 * @see https://make.wordpress.org/core/2022/10/10/filters-for-theme-json-data/ 168 * 169 * A different alternative considered was to invalidate the cache upon certain 170 * events such as options add/update/delete, user meta, etc. 171 * It was judged not enough, hence this approach. 172 * @see https://github.com/WordPress/gutenberg/pull/45372 173 */ 174 $cache_group = 'theme_json'; 175 $cache_key = 'wp_get_global_stylesheet'; 176 if ( $can_use_cached ) { 177 $cached = wp_cache_get( $cache_key, $cache_group ); 178 if ( $cached ) { 179 return $cached; 180 } 181 } 182 183 $tree = WP_Theme_JSON_Resolver::resolve_theme_file_uris( WP_Theme_JSON_Resolver::get_merged_data() ); 184 $supports_theme_json = wp_theme_has_theme_json(); 185 186 if ( empty( $types ) && ! $supports_theme_json ) { 187 $types = array( 'variables', 'presets', 'base-layout-styles' ); 188 } elseif ( empty( $types ) ) { 189 $types = array( 'variables', 'styles', 'presets' ); 190 } 191 192 /* 193 * If variables are part of the stylesheet, then add them. 194 * This is so themes without a theme.json still work as before 5.9: 195 * they can override the default presets. 196 * See https://core.trac.wordpress.org/ticket/54782 197 */ 198 $styles_variables = ''; 199 if ( in_array( 'variables', $types, true ) ) { 200 /* 201 * Only use the default, theme, and custom origins. Why? 202 * Because styles for `blocks` origin are added at a later phase 203 * (i.e. in the render cycle). Here, only the ones in use are rendered. 204 * @see wp_add_global_styles_for_blocks 205 */ 206 $origins = array( 'default', 'theme', 'custom' ); 207 $styles_variables = $tree->get_stylesheet( array( 'variables' ), $origins ); 208 $types = array_diff( $types, array( 'variables' ) ); 209 } 210 211 /* 212 * For the remaining types (presets, styles), we do consider origins: 213 * 214 * - themes without theme.json: only the classes for the presets defined by core 215 * - themes with theme.json: the presets and styles classes, both from core and the theme 216 */ 217 $styles_rest = ''; 218 if ( ! empty( $types ) ) { 219 /* 220 * Only use the default, theme, and custom origins. Why? 221 * Because styles for `blocks` origin are added at a later phase 222 * (i.e. in the render cycle). Here, only the ones in use are rendered. 223 * @see wp_add_global_styles_for_blocks 224 */ 225 $origins = array( 'default', 'theme', 'custom' ); 226 /* 227 * If the theme doesn't have theme.json but supports both appearance tools and color palette, 228 * the 'theme' origin should be included so color palette presets are also output. 229 */ 230 if ( ! $supports_theme_json && ( current_theme_supports( 'appearance-tools' ) || current_theme_supports( 'border' ) ) && current_theme_supports( 'editor-color-palette' ) ) { 231 $origins = array( 'default', 'theme' ); 232 } elseif ( ! $supports_theme_json ) { 233 $origins = array( 'default' ); 234 } 235 $styles_rest = $tree->get_stylesheet( $types, $origins ); 236 } 237 238 $stylesheet = $styles_variables . $styles_rest; 239 if ( $can_use_cached ) { 240 wp_cache_set( $cache_key, $stylesheet, $cache_group ); 241 } 242 243 return $stylesheet; 244 } 245 246 /** 247 * Adds global style rules to the inline style for each block. 248 * 249 * @since 6.1.0 250 * @since 6.7.0 Resolve relative paths in block styles. 251 * 252 * @global WP_Styles $wp_styles 253 */ 254 function wp_add_global_styles_for_blocks() { 255 global $wp_styles; 256 257 $tree = WP_Theme_JSON_Resolver::get_merged_data(); 258 $tree = WP_Theme_JSON_Resolver::resolve_theme_file_uris( $tree ); 259 $block_nodes = $tree->get_styles_block_nodes(); 260 261 $can_use_cached = ! wp_is_development_mode( 'theme' ); 262 $update_cache = false; 263 264 if ( $can_use_cached ) { 265 // Hash the merged WP_Theme_JSON data to bust cache on settings or styles change. 266 $cache_hash = md5( wp_json_encode( $tree->get_raw_data() ) ); 267 $cache_key = 'wp_styles_for_blocks'; 268 $cached = get_transient( $cache_key ); 269 270 // Reset the cached data if there is no value or if the hash has changed. 271 if ( ! is_array( $cached ) || $cached['hash'] !== $cache_hash ) { 272 $cached = array( 273 'hash' => $cache_hash, 274 'blocks' => array(), 275 ); 276 277 // Update the cache if the hash has changed. 278 $update_cache = true; 279 } 280 } 281 282 foreach ( $block_nodes as $metadata ) { 283 284 if ( $can_use_cached ) { 285 // Use the block name as the key for cached CSS data. Otherwise, use a hash of the metadata. 286 $cache_node_key = isset( $metadata['name'] ) ? $metadata['name'] : md5( wp_json_encode( $metadata ) ); 287 288 if ( isset( $cached['blocks'][ $cache_node_key ] ) ) { 289 $block_css = $cached['blocks'][ $cache_node_key ]; 290 } else { 291 $block_css = $tree->get_styles_for_block( $metadata ); 292 $cached['blocks'][ $cache_node_key ] = $block_css; 293 294 // Update the cache if the cache contents have changed. 295 $update_cache = true; 296 } 297 } else { 298 $block_css = $tree->get_styles_for_block( $metadata ); 299 } 300 301 if ( ! wp_should_load_block_assets_on_demand() ) { 302 wp_add_inline_style( 'global-styles', $block_css ); 303 continue; 304 } 305 306 $stylesheet_handle = 'global-styles'; 307 308 /* 309 * When `wp_should_load_block_assets_on_demand()` is true, block styles are 310 * enqueued for each block on the page in class WP_Block's render function. 311 * This means there will be a handle in the styles queue for each of those blocks. 312 * Block-specific global styles should be attached to the global-styles handle, but 313 * only for blocks on the page, thus we check if the block's handle is in the queue 314 * before adding the inline style. 315 * This conditional loading only applies to core blocks. 316 * TODO: Explore how this could be expanded to third-party blocks as well. 317 */ 318 if ( isset( $metadata['name'] ) ) { 319 if ( str_starts_with( $metadata['name'], 'core/' ) ) { 320 $block_name = str_replace( 'core/', '', $metadata['name'] ); 321 $block_handle = 'wp-block-' . $block_name; 322 if ( in_array( $block_handle, $wp_styles->queue, true ) ) { 323 wp_add_inline_style( $stylesheet_handle, $block_css ); 324 } 325 } else { 326 wp_add_inline_style( $stylesheet_handle, $block_css ); 327 } 328 } 329 330 // The likes of block element styles from theme.json do not have $metadata['name'] set. 331 if ( ! isset( $metadata['name'] ) && ! empty( $metadata['path'] ) ) { 332 $block_name = wp_get_block_name_from_theme_json_path( $metadata['path'] ); 333 if ( $block_name ) { 334 if ( str_starts_with( $block_name, 'core/' ) ) { 335 $block_name = str_replace( 'core/', '', $block_name ); 336 $block_handle = 'wp-block-' . $block_name; 337 if ( in_array( $block_handle, $wp_styles->queue, true ) ) { 338 wp_add_inline_style( $stylesheet_handle, $block_css ); 339 } 340 } else { 341 wp_add_inline_style( $stylesheet_handle, $block_css ); 342 } 343 } 344 } 345 } 346 347 if ( $update_cache ) { 348 set_transient( $cache_key, $cached ); 349 } 350 } 351 352 /** 353 * Gets the block name from a given theme.json path. 354 * 355 * @since 6.3.0 356 * @access private 357 * 358 * @param array $path An array of keys describing the path to a property in theme.json. 359 * @return string Identified block name, or empty string if none found. 360 */ 361 function wp_get_block_name_from_theme_json_path( $path ) { 362 // Block name is expected to be the third item after 'styles' and 'blocks'. 363 if ( 364 count( $path ) >= 3 365 && 'styles' === $path[0] 366 && 'blocks' === $path[1] 367 && str_contains( $path[2], '/' ) 368 ) { 369 return $path[2]; 370 } 371 372 /* 373 * As fallback and for backward compatibility, allow any core block to be 374 * at any position. 375 */ 376 $result = array_values( 377 array_filter( 378 $path, 379 static function ( $item ) { 380 if ( str_contains( $item, 'core/' ) ) { 381 return true; 382 } 383 return false; 384 } 385 ) 386 ); 387 if ( isset( $result[0] ) ) { 388 return $result[0]; 389 } 390 return ''; 391 } 392 393 /** 394 * Checks whether a theme or its parent has a theme.json file. 395 * 396 * @since 6.2.0 397 * 398 * @return bool Returns true if theme or its parent has a theme.json file, false otherwise. 399 */ 400 function wp_theme_has_theme_json() { 401 static $theme_has_support = array(); 402 403 $stylesheet = get_stylesheet(); 404 405 if ( 406 isset( $theme_has_support[ $stylesheet ] ) && 407 /* 408 * Ignore static cache when the development mode is set to 'theme', to avoid interfering with 409 * the theme developer's workflow. 410 */ 411 ! wp_is_development_mode( 'theme' ) 412 ) { 413 return $theme_has_support[ $stylesheet ]; 414 } 415 416 $stylesheet_directory = get_stylesheet_directory(); 417 $template_directory = get_template_directory(); 418 419 // This is the same as get_theme_file_path(), which isn't available in load-styles.php context 420 if ( $stylesheet_directory !== $template_directory && file_exists( $stylesheet_directory . '/theme.json' ) ) { 421 $path = $stylesheet_directory . '/theme.json'; 422 } else { 423 $path = $template_directory . '/theme.json'; 424 } 425 426 /** This filter is documented in wp-includes/link-template.php */ 427 $path = apply_filters( 'theme_file_path', $path, 'theme.json' ); 428 429 $theme_has_support[ $stylesheet ] = file_exists( $path ); 430 431 return $theme_has_support[ $stylesheet ]; 432 } 433 434 /** 435 * Cleans the caches under the theme_json group. 436 * 437 * @since 6.2.0 438 */ 439 function wp_clean_theme_json_cache() { 440 wp_cache_delete( 'wp_get_global_stylesheet', 'theme_json' ); 441 wp_cache_delete( 'wp_get_global_styles_svg_filters', 'theme_json' ); 442 wp_cache_delete( 'wp_get_global_settings_custom', 'theme_json' ); 443 wp_cache_delete( 'wp_get_global_settings_theme', 'theme_json' ); 444 wp_cache_delete( 'wp_get_global_styles_custom_css', 'theme_json' ); 445 wp_cache_delete( 'wp_get_theme_data_template_parts', 'theme_json' ); 446 WP_Theme_JSON_Resolver::clean_cached_data(); 447 } 448 449 /** 450 * Returns the current theme's wanted patterns (slugs) to be 451 * registered from Pattern Directory. 452 * 453 * @since 6.3.0 454 * 455 * @return string[] 456 */ 457 function wp_get_theme_directory_pattern_slugs() { 458 return WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) )->get_patterns(); 459 } 460 461 /** 462 * Returns the metadata for the custom templates defined by the theme via theme.json. 463 * 464 * @since 6.4.0 465 * 466 * @return array Associative array of `$template_name => $template_data` pairs, 467 * with `$template_data` having "title" and "postTypes" fields. 468 */ 469 function wp_get_theme_data_custom_templates() { 470 return WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) )->get_custom_templates(); 471 } 472 473 /** 474 * Returns the metadata for the template parts defined by the theme. 475 * 476 * @since 6.4.0 477 * 478 * @return array Associative array of `$part_name => $part_data` pairs, 479 * with `$part_data` having "title" and "area" fields. 480 */ 481 function wp_get_theme_data_template_parts() { 482 $cache_group = 'theme_json'; 483 $cache_key = 'wp_get_theme_data_template_parts'; 484 $can_use_cached = ! wp_is_development_mode( 'theme' ); 485 486 $metadata = false; 487 if ( $can_use_cached ) { 488 $metadata = wp_cache_get( $cache_key, $cache_group ); 489 if ( false !== $metadata ) { 490 return $metadata; 491 } 492 } 493 494 if ( false === $metadata ) { 495 $metadata = WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) )->get_template_parts(); 496 if ( $can_use_cached ) { 497 wp_cache_set( $cache_key, $metadata, $cache_group ); 498 } 499 } 500 501 return $metadata; 502 } 503 504 /** 505 * Determines the CSS selector for the block type and property provided, 506 * returning it if available. 507 * 508 * @since 6.3.0 509 * 510 * @param WP_Block_Type $block_type The block's type. 511 * @param string|array $target The desired selector's target, `root` or array path. 512 * @param boolean $fallback Whether to fall back to broader selector. 513 * 514 * @return string|null CSS selector or `null` if no selector available. 515 */ 516 function wp_get_block_css_selector( $block_type, $target = 'root', $fallback = false ) { 517 if ( empty( $target ) ) { 518 return null; 519 } 520 521 $has_selectors = ! empty( $block_type->selectors ); 522 523 // Root Selector. 524 525 // Calculated before returning as it can be used as fallback for 526 // feature selectors later on. 527 $root_selector = null; 528 529 if ( $has_selectors && isset( $block_type->selectors['root'] ) ) { 530 // Use the selectors API if available. 531 $root_selector = $block_type->selectors['root']; 532 } elseif ( isset( $block_type->supports['__experimentalSelector'] ) && is_string( $block_type->supports['__experimentalSelector'] ) ) { 533 // Use the old experimental selector supports property if set. 534 $root_selector = $block_type->supports['__experimentalSelector']; 535 } else { 536 // If no root selector found, generate default block class selector. 537 $block_name = str_replace( '/', '-', str_replace( 'core/', '', $block_type->name ) ); 538 $root_selector = ".wp-block-{$block_name}"; 539 } 540 541 // Return selector if it's the root target we are looking for. 542 if ( 'root' === $target ) { 543 return $root_selector; 544 } 545 546 // If target is not `root` we have a feature or subfeature as the target. 547 // If the target is a string convert to an array. 548 if ( is_string( $target ) ) { 549 $target = explode( '.', $target ); 550 } 551 552 // Feature Selectors ( May fallback to root selector ). 553 if ( 1 === count( $target ) ) { 554 $fallback_selector = $fallback ? $root_selector : null; 555 556 // Prefer the selectors API if available. 557 if ( $has_selectors ) { 558 // Look for selector under `feature.root`. 559 $path = array( current( $target ), 'root' ); 560 $feature_selector = _wp_array_get( $block_type->selectors, $path, null ); 561 562 if ( $feature_selector ) { 563 return $feature_selector; 564 } 565 566 // Check if feature selector is set via shorthand. 567 $feature_selector = _wp_array_get( $block_type->selectors, $target, null ); 568 569 return is_string( $feature_selector ) ? $feature_selector : $fallback_selector; 570 } 571 572 // Try getting old experimental supports selector value. 573 $path = array( current( $target ), '__experimentalSelector' ); 574 $feature_selector = _wp_array_get( $block_type->supports, $path, null ); 575 576 // Nothing to work with, provide fallback or null. 577 if ( null === $feature_selector ) { 578 return $fallback_selector; 579 } 580 581 // Scope the feature selector by the block's root selector. 582 return WP_Theme_JSON::scope_selector( $root_selector, $feature_selector ); 583 } 584 585 // Subfeature selector 586 // This may fallback either to parent feature or root selector. 587 $subfeature_selector = null; 588 589 // Use selectors API if available. 590 if ( $has_selectors ) { 591 $subfeature_selector = _wp_array_get( $block_type->selectors, $target, null ); 592 } 593 594 // Only return if we have a subfeature selector. 595 if ( $subfeature_selector ) { 596 return $subfeature_selector; 597 } 598 599 // To this point we don't have a subfeature selector. If a fallback 600 // has been requested, remove subfeature from target path and return 601 // results of a call for the parent feature's selector. 602 if ( $fallback ) { 603 return wp_get_block_css_selector( $block_type, $target[0], $fallback ); 604 } 605 606 return null; 607 }
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