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1 <?php 2 /** 3 * Style Engine: WP_Style_Engine class 4 * 5 * @package WordPress 6 * @subpackage StyleEngine 7 * @since 6.1.0 8 */ 9 10 /** 11 * The main class integrating all other WP_Style_Engine_* classes. 12 * 13 * The Style Engine aims to provide a consistent API for rendering styling for blocks 14 * across both client-side and server-side applications. 15 * 16 * This class is final and should not be extended. 17 * 18 * This class is for internal Core usage and is not supposed to be used by extenders 19 * (plugins and/or themes). This is a low-level API that may need to do breaking changes. 20 * Please, use wp_style_engine_get_styles() instead. 21 * 22 * @access private 23 * @since 6.1.0 24 * @since 6.3.0 Added support for text-columns. 25 * @since 6.4.0 Added support for background.backgroundImage. 26 * @since 6.5.0 Added support for background.backgroundPosition, 27 * background.backgroundRepeat and dimensions.aspectRatio. 28 * @since 6.7.0 Added support for typography.writingMode. 29 */ 30 #[AllowDynamicProperties] 31 final class WP_Style_Engine { 32 /** 33 * Style definitions that contain the instructions to parse/output valid Gutenberg styles from a block's attributes. 34 * 35 * For every style definition, the following properties are valid: 36 * 37 * - classnames => (array) an array of classnames to be returned for block styles. The key is a classname or pattern. 38 * A value of `true` means the classname should be applied always. Otherwise, a valid CSS property (string) 39 * to match the incoming value, e.g., "color" to match var:preset|color|somePresetSlug. 40 * - css_vars => (array) an array of key value pairs used to generate CSS var values. 41 * The key should be the CSS property name that matches the second element of the preset string value, 42 * i.e., "color" in var:preset|color|somePresetSlug. The value is a CSS var pattern (e.g. `--wp--preset--color--$slug`), 43 * whose `$slug` fragment will be replaced with the preset slug, which is the third element of the preset string value, 44 * i.e., `somePresetSlug` in var:preset|color|somePresetSlug. 45 * - property_keys => (array) array of keys whose values represent a valid CSS property, e.g., "margin" or "border". 46 * - path => (array) a path that accesses the corresponding style value in the block style object. 47 * - value_func => (string) the name of a function to generate a CSS definition array for a particular style object. The output of this function should be `array( "$property" => "$value", ... )`. 48 * 49 * @since 6.1.0 50 * @var array 51 */ 52 const BLOCK_STYLE_DEFINITIONS_METADATA = array( 53 'background' => array( 54 'backgroundImage' => array( 55 'property_keys' => array( 56 'default' => 'background-image', 57 ), 58 'value_func' => array( self::class, 'get_url_or_value_css_declaration' ), 59 'path' => array( 'background', 'backgroundImage' ), 60 ), 61 'backgroundPosition' => array( 62 'property_keys' => array( 63 'default' => 'background-position', 64 ), 65 'path' => array( 'background', 'backgroundPosition' ), 66 ), 67 'backgroundRepeat' => array( 68 'property_keys' => array( 69 'default' => 'background-repeat', 70 ), 71 'path' => array( 'background', 'backgroundRepeat' ), 72 ), 73 'backgroundSize' => array( 74 'property_keys' => array( 75 'default' => 'background-size', 76 ), 77 'path' => array( 'background', 'backgroundSize' ), 78 ), 79 'backgroundAttachment' => array( 80 'property_keys' => array( 81 'default' => 'background-attachment', 82 ), 83 'path' => array( 'background', 'backgroundAttachment' ), 84 ), 85 ), 86 'color' => array( 87 'text' => array( 88 'property_keys' => array( 89 'default' => 'color', 90 ), 91 'path' => array( 'color', 'text' ), 92 'css_vars' => array( 93 'color' => '--wp--preset--color--$slug', 94 ), 95 'classnames' => array( 96 'has-text-color' => true, 97 'has-$slug-color' => 'color', 98 ), 99 ), 100 'background' => array( 101 'property_keys' => array( 102 'default' => 'background-color', 103 ), 104 'path' => array( 'color', 'background' ), 105 'css_vars' => array( 106 'color' => '--wp--preset--color--$slug', 107 ), 108 'classnames' => array( 109 'has-background' => true, 110 'has-$slug-background-color' => 'color', 111 ), 112 ), 113 'gradient' => array( 114 'property_keys' => array( 115 'default' => 'background', 116 ), 117 'path' => array( 'color', 'gradient' ), 118 'css_vars' => array( 119 'gradient' => '--wp--preset--gradient--$slug', 120 ), 121 'classnames' => array( 122 'has-background' => true, 123 'has-$slug-gradient-background' => 'gradient', 124 ), 125 ), 126 ), 127 'border' => array( 128 'color' => array( 129 'property_keys' => array( 130 'default' => 'border-color', 131 'individual' => 'border-%s-color', 132 ), 133 'path' => array( 'border', 'color' ), 134 'classnames' => array( 135 'has-border-color' => true, 136 'has-$slug-border-color' => 'color', 137 ), 138 ), 139 'radius' => array( 140 'property_keys' => array( 141 'default' => 'border-radius', 142 'individual' => 'border-%s-radius', 143 ), 144 'path' => array( 'border', 'radius' ), 145 ), 146 'style' => array( 147 'property_keys' => array( 148 'default' => 'border-style', 149 'individual' => 'border-%s-style', 150 ), 151 'path' => array( 'border', 'style' ), 152 ), 153 'width' => array( 154 'property_keys' => array( 155 'default' => 'border-width', 156 'individual' => 'border-%s-width', 157 ), 158 'path' => array( 'border', 'width' ), 159 ), 160 'top' => array( 161 'value_func' => array( self::class, 'get_individual_property_css_declarations' ), 162 'path' => array( 'border', 'top' ), 163 'css_vars' => array( 164 'color' => '--wp--preset--color--$slug', 165 ), 166 ), 167 'right' => array( 168 'value_func' => array( self::class, 'get_individual_property_css_declarations' ), 169 'path' => array( 'border', 'right' ), 170 'css_vars' => array( 171 'color' => '--wp--preset--color--$slug', 172 ), 173 ), 174 'bottom' => array( 175 'value_func' => array( self::class, 'get_individual_property_css_declarations' ), 176 'path' => array( 'border', 'bottom' ), 177 'css_vars' => array( 178 'color' => '--wp--preset--color--$slug', 179 ), 180 ), 181 'left' => array( 182 'value_func' => array( self::class, 'get_individual_property_css_declarations' ), 183 'path' => array( 'border', 'left' ), 184 'css_vars' => array( 185 'color' => '--wp--preset--color--$slug', 186 ), 187 ), 188 ), 189 'shadow' => array( 190 'shadow' => array( 191 'property_keys' => array( 192 'default' => 'box-shadow', 193 ), 194 'path' => array( 'shadow' ), 195 'css_vars' => array( 196 'shadow' => '--wp--preset--shadow--$slug', 197 ), 198 ), 199 ), 200 'dimensions' => array( 201 'aspectRatio' => array( 202 'property_keys' => array( 203 'default' => 'aspect-ratio', 204 ), 205 'path' => array( 'dimensions', 'aspectRatio' ), 206 'classnames' => array( 207 'has-aspect-ratio' => true, 208 ), 209 ), 210 'minHeight' => array( 211 'property_keys' => array( 212 'default' => 'min-height', 213 ), 214 'path' => array( 'dimensions', 'minHeight' ), 215 'css_vars' => array( 216 'spacing' => '--wp--preset--spacing--$slug', 217 ), 218 ), 219 ), 220 'spacing' => array( 221 'padding' => array( 222 'property_keys' => array( 223 'default' => 'padding', 224 'individual' => 'padding-%s', 225 ), 226 'path' => array( 'spacing', 'padding' ), 227 'css_vars' => array( 228 'spacing' => '--wp--preset--spacing--$slug', 229 ), 230 ), 231 'margin' => array( 232 'property_keys' => array( 233 'default' => 'margin', 234 'individual' => 'margin-%s', 235 ), 236 'path' => array( 'spacing', 'margin' ), 237 'css_vars' => array( 238 'spacing' => '--wp--preset--spacing--$slug', 239 ), 240 ), 241 ), 242 'typography' => array( 243 'fontSize' => array( 244 'property_keys' => array( 245 'default' => 'font-size', 246 ), 247 'path' => array( 'typography', 'fontSize' ), 248 'css_vars' => array( 249 'font-size' => '--wp--preset--font-size--$slug', 250 ), 251 'classnames' => array( 252 'has-$slug-font-size' => 'font-size', 253 ), 254 ), 255 'fontFamily' => array( 256 'property_keys' => array( 257 'default' => 'font-family', 258 ), 259 'css_vars' => array( 260 'font-family' => '--wp--preset--font-family--$slug', 261 ), 262 'path' => array( 'typography', 'fontFamily' ), 263 'classnames' => array( 264 'has-$slug-font-family' => 'font-family', 265 ), 266 ), 267 'fontStyle' => array( 268 'property_keys' => array( 269 'default' => 'font-style', 270 ), 271 'path' => array( 'typography', 'fontStyle' ), 272 ), 273 'fontWeight' => array( 274 'property_keys' => array( 275 'default' => 'font-weight', 276 ), 277 'path' => array( 'typography', 'fontWeight' ), 278 ), 279 'lineHeight' => array( 280 'property_keys' => array( 281 'default' => 'line-height', 282 ), 283 'path' => array( 'typography', 'lineHeight' ), 284 ), 285 'textColumns' => array( 286 'property_keys' => array( 287 'default' => 'column-count', 288 ), 289 'path' => array( 'typography', 'textColumns' ), 290 ), 291 'textDecoration' => array( 292 'property_keys' => array( 293 'default' => 'text-decoration', 294 ), 295 'path' => array( 'typography', 'textDecoration' ), 296 ), 297 'textTransform' => array( 298 'property_keys' => array( 299 'default' => 'text-transform', 300 ), 301 'path' => array( 'typography', 'textTransform' ), 302 ), 303 'letterSpacing' => array( 304 'property_keys' => array( 305 'default' => 'letter-spacing', 306 ), 307 'path' => array( 'typography', 'letterSpacing' ), 308 ), 309 'writingMode' => array( 310 'property_keys' => array( 311 'default' => 'writing-mode', 312 ), 313 'path' => array( 'typography', 'writingMode' ), 314 ), 315 ), 316 ); 317 318 /** 319 * Util: Extracts the slug in kebab case from a preset string, 320 * e.g. `heavenly-blue` from `var:preset|color|heavenlyBlue`. 321 * 322 * @since 6.1.0 323 * 324 * @param string $style_value A single CSS preset value. 325 * @param string $property_key The CSS property that is the second element of the preset string. 326 * Used for matching. 327 * @return string The slug, or empty string if not found. 328 */ 329 protected static function get_slug_from_preset_value( $style_value, $property_key ) { 330 if ( is_string( $style_value ) && is_string( $property_key ) 331 && str_contains( $style_value, "var:preset|{$property_key}|" ) 332 ) { 333 $index_to_splice = strrpos( $style_value, '|' ) + 1; 334 return _wp_to_kebab_case( substr( $style_value, $index_to_splice ) ); 335 } 336 return ''; 337 } 338 339 /** 340 * Util: Generates a CSS var string, e.g. `var(--wp--preset--color--background)` 341 * from a preset string such as `var:preset|space|50`. 342 * 343 * @since 6.1.0 344 * 345 * @param string $style_value A single CSS preset value. 346 * @param string[] $css_vars An associate array of CSS var patterns 347 * used to generate the var string. 348 * @return string The CSS var, or an empty string if no match for slug found. 349 */ 350 protected static function get_css_var_value( $style_value, $css_vars ) { 351 foreach ( $css_vars as $property_key => $css_var_pattern ) { 352 $slug = static::get_slug_from_preset_value( $style_value, $property_key ); 353 if ( static::is_valid_style_value( $slug ) ) { 354 $var = strtr( 355 $css_var_pattern, 356 array( '$slug' => $slug ) 357 ); 358 return "var($var)"; 359 } 360 } 361 return ''; 362 } 363 364 /** 365 * Util: Checks whether an incoming block style value is valid. 366 * 367 * @since 6.1.0 368 * 369 * @param string $style_value A single CSS preset value. 370 * @return bool 371 */ 372 protected static function is_valid_style_value( $style_value ) { 373 return '0' === $style_value || ! empty( $style_value ); 374 } 375 376 /** 377 * Stores a CSS rule using the provided CSS selector and CSS declarations. 378 * 379 * @since 6.1.0 380 * @since 6.6.0 Added the `$rules_group` parameter. 381 * 382 * @param string $store_name A valid store key. 383 * @param string $css_selector When a selector is passed, the function will return 384 * a full CSS rule `$selector { ...rules }` 385 * otherwise a concatenated string of properties and values. 386 * @param string[] $css_declarations An associative array of CSS definitions, 387 * e.g. `array( "$property" => "$value", "$property" => "$value" )`. 388 * @param string $rules_group Optional. A parent CSS selector in the case of nested CSS, or a CSS nested @rule, 389 * such as `@media (min-width: 80rem)` or `@layer module`. 390 */ 391 public static function store_css_rule( $store_name, $css_selector, $css_declarations, $rules_group = '' ) { 392 if ( empty( $store_name ) || empty( $css_selector ) || empty( $css_declarations ) ) { 393 return; 394 } 395 static::get_store( $store_name )->add_rule( $css_selector, $rules_group )->add_declarations( $css_declarations ); 396 } 397 398 /** 399 * Returns a store by store key. 400 * 401 * @since 6.1.0 402 * 403 * @param string $store_name A store key. 404 * @return WP_Style_Engine_CSS_Rules_Store|null 405 */ 406 public static function get_store( $store_name ) { 407 return WP_Style_Engine_CSS_Rules_Store::get_store( $store_name ); 408 } 409 410 /** 411 * Returns classnames and CSS based on the values in a styles object. 412 * 413 * Return values are parsed based on the instructions in BLOCK_STYLE_DEFINITIONS_METADATA. 414 * 415 * @since 6.1.0 416 * 417 * @param array $block_styles The style object. 418 * @param array $options { 419 * Optional. An array of options. Default empty array. 420 * 421 * @type bool $convert_vars_to_classnames Whether to skip converting incoming CSS var patterns, 422 * e.g. `var:preset|<PRESET_TYPE>|<PRESET_SLUG>`, 423 * to `var( --wp--preset--* )` values. Default false. 424 * @type string $selector Optional. When a selector is passed, 425 * the value of `$css` in the return value will comprise 426 * a full CSS rule `$selector { ...$css_declarations }`, 427 * otherwise, the value will be a concatenated string 428 * of CSS declarations. 429 * } 430 * @return array { 431 * @type string[] $classnames Array of class names. 432 * @type string[] $declarations An associative array of CSS definitions, 433 * e.g. `array( "$property" => "$value", "$property" => "$value" )`. 434 * } 435 */ 436 public static function parse_block_styles( $block_styles, $options ) { 437 $parsed_styles = array( 438 'classnames' => array(), 439 'declarations' => array(), 440 ); 441 if ( empty( $block_styles ) || ! is_array( $block_styles ) ) { 442 return $parsed_styles; 443 } 444 445 // Collect CSS and classnames. 446 foreach ( static::BLOCK_STYLE_DEFINITIONS_METADATA as $definition_group_key => $definition_group_style ) { 447 if ( empty( $block_styles[ $definition_group_key ] ) ) { 448 continue; 449 } 450 foreach ( $definition_group_style as $style_definition ) { 451 $style_value = _wp_array_get( $block_styles, $style_definition['path'], null ); 452 453 if ( ! static::is_valid_style_value( $style_value ) ) { 454 continue; 455 } 456 457 $classnames = static::get_classnames( $style_value, $style_definition ); 458 if ( ! empty( $classnames ) ) { 459 $parsed_styles['classnames'] = array_merge( $parsed_styles['classnames'], $classnames ); 460 } 461 462 $css_declarations = static::get_css_declarations( $style_value, $style_definition, $options ); 463 if ( ! empty( $css_declarations ) ) { 464 $parsed_styles['declarations'] = array_merge( $parsed_styles['declarations'], $css_declarations ); 465 } 466 } 467 } 468 469 return $parsed_styles; 470 } 471 472 /** 473 * Returns classnames, and generates classname(s) from a CSS preset property pattern, 474 * e.g. `var:preset|<PRESET_TYPE>|<PRESET_SLUG>`. 475 * 476 * @since 6.1.0 477 * 478 * @param string $style_value A single raw style value or CSS preset property 479 * from the `$block_styles` array. 480 * @param array $style_definition A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA. 481 * @return string[] An array of CSS classnames, or empty array if there are none. 482 */ 483 protected static function get_classnames( $style_value, $style_definition ) { 484 if ( empty( $style_value ) ) { 485 return array(); 486 } 487 488 $classnames = array(); 489 if ( ! empty( $style_definition['classnames'] ) ) { 490 foreach ( $style_definition['classnames'] as $classname => $property_key ) { 491 if ( true === $property_key ) { 492 $classnames[] = $classname; 493 continue; 494 } 495 496 $slug = static::get_slug_from_preset_value( $style_value, $property_key ); 497 498 if ( $slug ) { 499 /* 500 * Right now we expect a classname pattern to be stored in BLOCK_STYLE_DEFINITIONS_METADATA. 501 * One day, if there are no stored schemata, we could allow custom patterns or 502 * generate classnames based on other properties 503 * such as a path or a value or a prefix passed in options. 504 */ 505 $classnames[] = strtr( $classname, array( '$slug' => $slug ) ); 506 } 507 } 508 } 509 510 return $classnames; 511 } 512 513 /** 514 * Returns an array of CSS declarations based on valid block style values. 515 * 516 * @since 6.1.0 517 * 518 * @param mixed $style_value A single raw style value from $block_styles array. 519 * @param array $style_definition A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA. 520 * @param array $options { 521 * Optional. An array of options. Default empty array. 522 * 523 * @type bool $convert_vars_to_classnames Whether to skip converting incoming CSS var patterns, 524 * e.g. `var:preset|<PRESET_TYPE>|<PRESET_SLUG>`, 525 * to `var( --wp--preset--* )` values. Default false. 526 * } 527 * @return string[] An associative array of CSS definitions, e.g. `array( "$property" => "$value", "$property" => "$value" )`. 528 */ 529 protected static function get_css_declarations( $style_value, $style_definition, $options = array() ) { 530 if ( isset( $style_definition['value_func'] ) && is_callable( $style_definition['value_func'] ) ) { 531 return call_user_func( $style_definition['value_func'], $style_value, $style_definition, $options ); 532 } 533 534 $css_declarations = array(); 535 $style_property_keys = $style_definition['property_keys']; 536 $should_skip_css_vars = isset( $options['convert_vars_to_classnames'] ) && true === $options['convert_vars_to_classnames']; 537 538 /* 539 * Build CSS var values from `var:preset|<PRESET_TYPE>|<PRESET_SLUG>` values, e.g, `var(--wp--css--rule-slug )`. 540 * Check if the value is a CSS preset and there's a corresponding css_var pattern in the style definition. 541 */ 542 if ( is_string( $style_value ) && str_contains( $style_value, 'var:' ) ) { 543 if ( ! $should_skip_css_vars && ! empty( $style_definition['css_vars'] ) ) { 544 $css_var = static::get_css_var_value( $style_value, $style_definition['css_vars'] ); 545 if ( static::is_valid_style_value( $css_var ) ) { 546 $css_declarations[ $style_property_keys['default'] ] = $css_var; 547 } 548 } 549 return $css_declarations; 550 } 551 552 /* 553 * Default rule builder. 554 * If the input contains an array, assume box model-like properties 555 * for styles such as margins and padding. 556 */ 557 if ( is_array( $style_value ) ) { 558 // Bail out early if the `'individual'` property is not defined. 559 if ( ! isset( $style_property_keys['individual'] ) ) { 560 return $css_declarations; 561 } 562 563 foreach ( $style_value as $key => $value ) { 564 if ( is_string( $value ) && str_contains( $value, 'var:' ) && ! $should_skip_css_vars && ! empty( $style_definition['css_vars'] ) ) { 565 $value = static::get_css_var_value( $value, $style_definition['css_vars'] ); 566 } 567 568 $individual_property = sprintf( $style_property_keys['individual'], _wp_to_kebab_case( $key ) ); 569 570 if ( $individual_property && static::is_valid_style_value( $value ) ) { 571 $css_declarations[ $individual_property ] = $value; 572 } 573 } 574 575 return $css_declarations; 576 } 577 578 $css_declarations[ $style_property_keys['default'] ] = $style_value; 579 return $css_declarations; 580 } 581 582 /** 583 * Style value parser that returns a CSS definition array comprising style properties 584 * that have keys representing individual style properties, otherwise known as longhand CSS properties. 585 * 586 * Example: 587 * 588 * "$style_property-$individual_feature: $value;" 589 * 590 * Which could represent the following: 591 * 592 * "border-{top|right|bottom|left}-{color|width|style}: {value};" 593 * 594 * or: 595 * 596 * "border-image-{outset|source|width|repeat|slice}: {value};" 597 * 598 * @since 6.1.0 599 * 600 * @param array $style_value A single raw style value from `$block_styles` array. 601 * @param array $individual_property_definition A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA 602 * representing an individual property of a CSS property, 603 * e.g. 'top' in 'border-top'. 604 * @param array $options { 605 * Optional. An array of options. Default empty array. 606 * 607 * @type bool $convert_vars_to_classnames Whether to skip converting incoming CSS var patterns, 608 * e.g. `var:preset|<PRESET_TYPE>|<PRESET_SLUG>`, 609 * to `var( --wp--preset--* )` values. Default false. 610 * } 611 * @return string[] An associative array of CSS definitions, e.g. `array( "$property" => "$value", "$property" => "$value" )`. 612 */ 613 protected static function get_individual_property_css_declarations( $style_value, $individual_property_definition, $options = array() ) { 614 if ( ! is_array( $style_value ) || empty( $style_value ) || empty( $individual_property_definition['path'] ) ) { 615 return array(); 616 } 617 618 /* 619 * The first item in $individual_property_definition['path'] array 620 * tells us the style property, e.g. "border". We use this to get a corresponding 621 * CSS style definition such as "color" or "width" from the same group. 622 * 623 * The second item in $individual_property_definition['path'] array 624 * refers to the individual property marker, e.g. "top". 625 */ 626 $definition_group_key = $individual_property_definition['path'][0]; 627 $individual_property_key = $individual_property_definition['path'][1]; 628 $should_skip_css_vars = isset( $options['convert_vars_to_classnames'] ) && true === $options['convert_vars_to_classnames']; 629 $css_declarations = array(); 630 631 foreach ( $style_value as $css_property => $value ) { 632 if ( empty( $value ) ) { 633 continue; 634 } 635 636 // Build a path to the individual rules in definitions. 637 $style_definition_path = array( $definition_group_key, $css_property ); 638 $style_definition = _wp_array_get( static::BLOCK_STYLE_DEFINITIONS_METADATA, $style_definition_path, null ); 639 640 if ( $style_definition && isset( $style_definition['property_keys']['individual'] ) ) { 641 // Set a CSS var if there is a valid preset value. 642 if ( is_string( $value ) && str_contains( $value, 'var:' ) 643 && ! $should_skip_css_vars && ! empty( $individual_property_definition['css_vars'] ) 644 ) { 645 $value = static::get_css_var_value( $value, $individual_property_definition['css_vars'] ); 646 } 647 648 $individual_css_property = sprintf( $style_definition['property_keys']['individual'], $individual_property_key ); 649 650 $css_declarations[ $individual_css_property ] = $value; 651 } 652 } 653 return $css_declarations; 654 } 655 656 /** 657 * Style value parser that constructs a CSS definition array comprising a single CSS property and value. 658 * If the provided value is an array containing a `url` property, the function will return a CSS definition array 659 * with a single property and value, with `url` escaped and injected into a CSS `url()` function, 660 * e.g., array( 'background-image' => "url( '...' )" ). 661 * 662 * @since 6.4.0 663 * 664 * @param array $style_value A single raw style value from $block_styles array. 665 * @param array $style_definition A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA. 666 * @return string[] An associative array of CSS definitions, e.g., array( "$property" => "$value", "$property" => "$value" ). 667 */ 668 protected static function get_url_or_value_css_declaration( $style_value, $style_definition ) { 669 if ( empty( $style_value ) ) { 670 return array(); 671 } 672 673 $css_declarations = array(); 674 675 if ( isset( $style_definition['property_keys']['default'] ) ) { 676 $value = null; 677 678 if ( ! empty( $style_value['url'] ) ) { 679 $value = "url('" . $style_value['url'] . "')"; 680 } elseif ( is_string( $style_value ) ) { 681 $value = $style_value; 682 } 683 684 if ( null !== $value ) { 685 $css_declarations[ $style_definition['property_keys']['default'] ] = $value; 686 } 687 } 688 689 return $css_declarations; 690 } 691 692 /** 693 * Returns compiled CSS from CSS declarations. 694 * 695 * @since 6.1.0 696 * 697 * @param string[] $css_declarations An associative array of CSS definitions, 698 * e.g. `array( "$property" => "$value", "$property" => "$value" )`. 699 * @param string $css_selector When a selector is passed, the function will return 700 * a full CSS rule `$selector { ...rules }`, 701 * otherwise a concatenated string of properties and values. 702 * @return string A compiled CSS string. 703 */ 704 public static function compile_css( $css_declarations, $css_selector ) { 705 if ( empty( $css_declarations ) || ! is_array( $css_declarations ) ) { 706 return ''; 707 } 708 709 // Return an entire rule if there is a selector. 710 if ( $css_selector ) { 711 $css_rule = new WP_Style_Engine_CSS_Rule( $css_selector, $css_declarations ); 712 return $css_rule->get_css(); 713 } 714 715 $css_declarations = new WP_Style_Engine_CSS_Declarations( $css_declarations ); 716 return $css_declarations->get_declarations_string(); 717 } 718 719 /** 720 * Returns a compiled stylesheet from stored CSS rules. 721 * 722 * @since 6.1.0 723 * 724 * @param WP_Style_Engine_CSS_Rule[] $css_rules An array of WP_Style_Engine_CSS_Rule objects 725 * from a store or otherwise. 726 * @param array $options { 727 * Optional. An array of options. Default empty array. 728 * 729 * @type string|null $context An identifier describing the origin of the style object, 730 * e.g. 'block-supports' or 'global-styles'. Default 'block-supports'. 731 * When set, the style engine will attempt to store the CSS rules. 732 * @type bool $optimize Whether to optimize the CSS output, e.g. combine rules. 733 * Default false. 734 * @type bool $prettify Whether to add new lines and indents to output. 735 * Defaults to whether the `SCRIPT_DEBUG` constant is defined. 736 * } 737 * @return string A compiled stylesheet from stored CSS rules. 738 */ 739 public static function compile_stylesheet_from_css_rules( $css_rules, $options = array() ) { 740 $processor = new WP_Style_Engine_Processor(); 741 $processor->add_rules( $css_rules ); 742 return $processor->get_css( $options ); 743 } 744 }
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