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1 <?php 2 /** 3 * Dependencies API: WP_Scripts class 4 * 5 * @since 2.6.0 6 * 7 * @package WordPress 8 * @subpackage Dependencies 9 */ 10 11 /** 12 * Core class used to register scripts. 13 * 14 * @since 2.1.0 15 * 16 * @see WP_Dependencies 17 */ 18 class WP_Scripts extends WP_Dependencies { 19 /** 20 * Base URL for scripts. 21 * 22 * Full URL with trailing slash. 23 * 24 * @since 2.6.0 25 * @var string 26 */ 27 public $base_url; 28 29 /** 30 * URL of the content directory. 31 * 32 * @since 2.8.0 33 * @var string 34 */ 35 public $content_url; 36 37 /** 38 * Default version string for scripts. 39 * 40 * @since 2.6.0 41 * @var string 42 */ 43 public $default_version; 44 45 /** 46 * Holds handles of scripts which are enqueued in footer. 47 * 48 * @since 2.8.0 49 * @var array 50 */ 51 public $in_footer = array(); 52 53 /** 54 * Holds a list of script handles which will be concatenated. 55 * 56 * @since 2.8.0 57 * @var string 58 */ 59 public $concat = ''; 60 61 /** 62 * Holds a string which contains script handles and their version. 63 * 64 * @since 2.8.0 65 * @deprecated 3.4.0 66 * @var string 67 */ 68 public $concat_version = ''; 69 70 /** 71 * Whether to perform concatenation. 72 * 73 * @since 2.8.0 74 * @var bool 75 */ 76 public $do_concat = false; 77 78 /** 79 * Holds HTML markup of scripts and additional data if concatenation 80 * is enabled. 81 * 82 * @since 2.8.0 83 * @var string 84 */ 85 public $print_html = ''; 86 87 /** 88 * Holds inline code if concatenation is enabled. 89 * 90 * @since 2.8.0 91 * @var string 92 */ 93 public $print_code = ''; 94 95 /** 96 * Holds a list of script handles which are not in the default directory 97 * if concatenation is enabled. 98 * 99 * Unused in core. 100 * 101 * @since 2.8.0 102 * @var string 103 */ 104 public $ext_handles = ''; 105 106 /** 107 * Holds a string which contains handles and versions of scripts which 108 * are not in the default directory if concatenation is enabled. 109 * 110 * Unused in core. 111 * 112 * @since 2.8.0 113 * @var string 114 */ 115 public $ext_version = ''; 116 117 /** 118 * List of default directories. 119 * 120 * @since 2.8.0 121 * @var array 122 */ 123 public $default_dirs; 124 125 /** 126 * Holds a string which contains the type attribute for script tag. 127 * 128 * If the current theme does not declare HTML5 support for 'script', 129 * then it initializes as `type='text/javascript'`. 130 * 131 * @since 5.3.0 132 * @var string 133 */ 134 private $type_attr = ''; 135 136 /** 137 * Constructor. 138 * 139 * @since 2.6.0 140 */ 141 public function __construct() { 142 $this->init(); 143 add_action( 'init', array( $this, 'init' ), 0 ); 144 } 145 146 /** 147 * Initialize the class. 148 * 149 * @since 3.4.0 150 */ 151 public function init() { 152 if ( 153 function_exists( 'is_admin' ) && ! is_admin() 154 && 155 function_exists( 'current_theme_supports' ) && ! current_theme_supports( 'html5', 'script' ) 156 ) { 157 $this->type_attr = " type='text/javascript'"; 158 } 159 160 /** 161 * Fires when the WP_Scripts instance is initialized. 162 * 163 * @since 2.6.0 164 * 165 * @param WP_Scripts $this WP_Scripts instance (passed by reference). 166 */ 167 do_action_ref_array( 'wp_default_scripts', array( &$this ) ); 168 } 169 170 /** 171 * Prints scripts. 172 * 173 * Prints the scripts passed to it or the print queue. Also prints all necessary dependencies. 174 * 175 * @since 2.1.0 176 * @since 2.8.0 Added the `$group` parameter. 177 * 178 * @param string|string[]|false $handles Optional. Scripts to be printed: queue (false), 179 * single script (string), or multiple scripts (array of strings). 180 * Default false. 181 * @param int|false $group Optional. Group level: level (int), no groups (false). 182 * Default false. 183 * @return string[] Handles of scripts that have been printed. 184 */ 185 public function print_scripts( $handles = false, $group = false ) { 186 return $this->do_items( $handles, $group ); 187 } 188 189 /** 190 * Prints extra scripts of a registered script. 191 * 192 * @since 2.1.0 193 * @since 2.8.0 Added the `$echo` parameter. 194 * @deprecated 3.3.0 195 * 196 * @see print_extra_script() 197 * 198 * @param string $handle The script's registered handle. 199 * @param bool $echo Optional. Whether to echo the extra script 200 * instead of just returning it. Default true. 201 * @return bool|string|void Void if no data exists, extra scripts if `$echo` is true, 202 * true otherwise. 203 */ 204 public function print_scripts_l10n( $handle, $echo = true ) { 205 _deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' ); 206 return $this->print_extra_script( $handle, $echo ); 207 } 208 209 /** 210 * Prints extra scripts of a registered script. 211 * 212 * @since 3.3.0 213 * 214 * @param string $handle The script's registered handle. 215 * @param bool $echo Optional. Whether to echo the extra script 216 * instead of just returning it. Default true. 217 * @return bool|string|void Void if no data exists, extra scripts if `$echo` is true, 218 * true otherwise. 219 */ 220 public function print_extra_script( $handle, $echo = true ) { 221 $output = $this->get_data( $handle, 'data' ); 222 if ( ! $output ) { 223 return; 224 } 225 226 if ( ! $echo ) { 227 return $output; 228 } 229 230 echo "<script{$this->type_attr}>\n"; 231 232 // CDATA is not needed for HTML 5. 233 if ( $this->type_attr ) { 234 echo "/* <![CDATA[ */\n"; 235 } 236 237 echo "$output\n"; 238 239 if ( $this->type_attr ) { 240 echo "/* ]]> */\n"; 241 } 242 243 echo "</script>\n"; 244 245 return true; 246 } 247 248 /** 249 * Processes a script dependency. 250 * 251 * @since 2.6.0 252 * @since 2.8.0 Added the `$group` parameter. 253 * 254 * @see WP_Dependencies::do_item() 255 * 256 * @param string $handle The script's registered handle. 257 * @param int|false $group Optional. Group level: level (int), no groups (false). 258 * Default false. 259 * @return bool True on success, false on failure. 260 */ 261 public function do_item( $handle, $group = false ) { 262 if ( ! parent::do_item( $handle ) ) { 263 return false; 264 } 265 266 if ( 0 === $group && $this->groups[ $handle ] > 0 ) { 267 $this->in_footer[] = $handle; 268 return false; 269 } 270 271 if ( false === $group && in_array( $handle, $this->in_footer, true ) ) { 272 $this->in_footer = array_diff( $this->in_footer, (array) $handle ); 273 } 274 275 $obj = $this->registered[ $handle ]; 276 277 if ( null === $obj->ver ) { 278 $ver = ''; 279 } else { 280 $ver = $obj->ver ? $obj->ver : $this->default_version; 281 } 282 283 if ( isset( $this->args[ $handle ] ) ) { 284 $ver = $ver ? $ver . '&' . $this->args[ $handle ] : $this->args[ $handle ]; 285 } 286 287 $src = $obj->src; 288 $cond_before = ''; 289 $cond_after = ''; 290 $conditional = isset( $obj->extra['conditional'] ) ? $obj->extra['conditional'] : ''; 291 292 if ( $conditional ) { 293 $cond_before = "<!--[if {$conditional}]>\n"; 294 $cond_after = "<![endif]-->\n"; 295 } 296 297 $before_handle = $this->print_inline_script( $handle, 'before', false ); 298 $after_handle = $this->print_inline_script( $handle, 'after', false ); 299 300 if ( $before_handle ) { 301 $before_handle = sprintf( "<script%s>\n%s\n</script>\n", $this->type_attr, $before_handle ); 302 } 303 304 if ( $after_handle ) { 305 $after_handle = sprintf( "<script%s>\n%s\n</script>\n", $this->type_attr, $after_handle ); 306 } 307 308 if ( $before_handle || $after_handle ) { 309 $inline_script_tag = $cond_before . $before_handle . $after_handle . $cond_after; 310 } else { 311 $inline_script_tag = ''; 312 } 313 314 if ( $this->do_concat ) { 315 /** 316 * Filters the script loader source. 317 * 318 * @since 2.2.0 319 * 320 * @param string $src Script loader source path. 321 * @param string $handle Script handle. 322 */ 323 $srce = apply_filters( 'script_loader_src', $src, $handle ); 324 325 if ( $this->in_default_dir( $srce ) && ( $before_handle || $after_handle ) ) { 326 $this->do_concat = false; 327 328 // Have to print the so-far concatenated scripts right away to maintain the right order. 329 _print_scripts(); 330 $this->reset(); 331 } elseif ( $this->in_default_dir( $srce ) && ! $conditional ) { 332 $this->print_code .= $this->print_extra_script( $handle, false ); 333 $this->concat .= "$handle,"; 334 $this->concat_version .= "$handle$ver"; 335 return true; 336 } else { 337 $this->ext_handles .= "$handle,"; 338 $this->ext_version .= "$handle$ver"; 339 } 340 } 341 342 $has_conditional_data = $conditional && $this->get_data( $handle, 'data' ); 343 344 if ( $has_conditional_data ) { 345 echo $cond_before; 346 } 347 348 $this->print_extra_script( $handle ); 349 350 if ( $has_conditional_data ) { 351 echo $cond_after; 352 } 353 354 // A single item may alias a set of items, by having dependencies, but no source. 355 if ( ! $src ) { 356 if ( $inline_script_tag ) { 357 if ( $this->do_concat ) { 358 $this->print_html .= $inline_script_tag; 359 } else { 360 echo $inline_script_tag; 361 } 362 } 363 364 return true; 365 } 366 367 $translations = $this->print_translations( $handle, false ); 368 if ( $translations ) { 369 $translations = sprintf( "<script%s>\n%s\n</script>\n", $this->type_attr, $translations ); 370 } 371 372 if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && 0 === strpos( $src, $this->content_url ) ) ) { 373 $src = $this->base_url . $src; 374 } 375 376 if ( ! empty( $ver ) ) { 377 $src = add_query_arg( 'ver', $ver, $src ); 378 } 379 380 /** This filter is documented in wp-includes/class.wp-scripts.php */ 381 $src = esc_url( apply_filters( 'script_loader_src', $src, $handle ) ); 382 383 if ( ! $src ) { 384 return true; 385 } 386 387 $tag = $translations . $cond_before . $before_handle; 388 $tag .= sprintf( "<script%s src='%s'></script>\n", $this->type_attr, $src ); 389 $tag .= $after_handle . $cond_after; 390 391 /** 392 * Filters the HTML script tag of an enqueued script. 393 * 394 * @since 4.1.0 395 * 396 * @param string $tag The `<script>` tag for the enqueued script. 397 * @param string $handle The script's registered handle. 398 * @param string $src The script's source URL. 399 */ 400 $tag = apply_filters( 'script_loader_tag', $tag, $handle, $src ); 401 402 if ( $this->do_concat ) { 403 $this->print_html .= $tag; 404 } else { 405 echo $tag; 406 } 407 408 return true; 409 } 410 411 /** 412 * Adds extra code to a registered script. 413 * 414 * @since 4.5.0 415 * 416 * @param string $handle Name of the script to add the inline script to. 417 * Must be lowercase. 418 * @param string $data String containing the javascript to be added. 419 * @param string $position Optional. Whether to add the inline script 420 * before the handle or after. Default 'after'. 421 * @return bool True on success, false on failure. 422 */ 423 public function add_inline_script( $handle, $data, $position = 'after' ) { 424 if ( ! $data ) { 425 return false; 426 } 427 428 if ( 'after' !== $position ) { 429 $position = 'before'; 430 } 431 432 $script = (array) $this->get_data( $handle, $position ); 433 $script[] = $data; 434 435 return $this->add_data( $handle, $position, $script ); 436 } 437 438 /** 439 * Prints inline scripts registered for a specific handle. 440 * 441 * @since 4.5.0 442 * 443 * @param string $handle Name of the script to add the inline script to. 444 * Must be lowercase. 445 * @param string $position Optional. Whether to add the inline script 446 * before the handle or after. Default 'after'. 447 * @param bool $echo Optional. Whether to echo the script 448 * instead of just returning it. Default true. 449 * @return string|false Script on success, false otherwise. 450 */ 451 public function print_inline_script( $handle, $position = 'after', $echo = true ) { 452 $output = $this->get_data( $handle, $position ); 453 454 if ( empty( $output ) ) { 455 return false; 456 } 457 458 $output = trim( implode( "\n", $output ), "\n" ); 459 460 if ( $echo ) { 461 printf( "<script%s>\n%s\n</script>\n", $this->type_attr, $output ); 462 } 463 464 return $output; 465 } 466 467 /** 468 * Localizes a script, only if the script has already been added. 469 * 470 * @since 2.1.0 471 * 472 * @param string $handle Name of the script to attach data to. 473 * @param string $object_name Name of the variable that will contain the data. 474 * @param array $l10n Array of data to localize. 475 * @return bool True on success, false on failure. 476 */ 477 public function localize( $handle, $object_name, $l10n ) { 478 if ( 'jquery' === $handle ) { 479 $handle = 'jquery-core'; 480 } 481 482 if ( is_array( $l10n ) && isset( $l10n['l10n_print_after'] ) ) { // back compat, preserve the code in 'l10n_print_after' if present. 483 $after = $l10n['l10n_print_after']; 484 unset( $l10n['l10n_print_after'] ); 485 } 486 487 foreach ( (array) $l10n as $key => $value ) { 488 if ( ! is_scalar( $value ) ) { 489 continue; 490 } 491 492 $l10n[ $key ] = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8' ); 493 } 494 495 $script = "var $object_name = " . wp_json_encode( $l10n ) . ';'; 496 497 if ( ! empty( $after ) ) { 498 $script .= "\n$after;"; 499 } 500 501 $data = $this->get_data( $handle, 'data' ); 502 503 if ( ! empty( $data ) ) { 504 $script = "$data\n$script"; 505 } 506 507 return $this->add_data( $handle, 'data', $script ); 508 } 509 510 /** 511 * Sets handle group. 512 * 513 * @since 2.8.0 514 * 515 * @see WP_Dependencies::set_group() 516 * 517 * @param string $handle Name of the item. Should be unique. 518 * @param bool $recursion Internal flag that calling function was called recursively. 519 * @param int|false $group Optional. Group level: level (int), no groups (false). 520 * Default false. 521 * @return bool Not already in the group or a lower group. 522 */ 523 public function set_group( $handle, $recursion, $group = false ) { 524 if ( isset( $this->registered[ $handle ]->args ) && 1 === $this->registered[ $handle ]->args ) { 525 $grp = 1; 526 } else { 527 $grp = (int) $this->get_data( $handle, 'group' ); 528 } 529 530 if ( false !== $group && $grp > $group ) { 531 $grp = $group; 532 } 533 534 return parent::set_group( $handle, $recursion, $grp ); 535 } 536 537 /** 538 * Sets a translation textdomain. 539 * 540 * @since 5.0.0 541 * @since 5.1.0 The `$domain` parameter was made optional. 542 * 543 * @param string $handle Name of the script to register a translation domain to. 544 * @param string $domain Optional. Text domain. Default 'default'. 545 * @param string $path Optional. The full file path to the directory containing translation files. 546 * @return bool True if the text domain was registered, false if not. 547 */ 548 public function set_translations( $handle, $domain = 'default', $path = null ) { 549 if ( ! isset( $this->registered[ $handle ] ) ) { 550 return false; 551 } 552 553 /** @var \_WP_Dependency $obj */ 554 $obj = $this->registered[ $handle ]; 555 556 if ( ! in_array( 'wp-i18n', $obj->deps, true ) ) { 557 $obj->deps[] = 'wp-i18n'; 558 } 559 560 return $obj->set_translations( $domain, $path ); 561 } 562 563 /** 564 * Prints translations set for a specific handle. 565 * 566 * @since 5.0.0 567 * 568 * @param string $handle Name of the script to add the inline script to. 569 * Must be lowercase. 570 * @param bool $echo Optional. Whether to echo the script 571 * instead of just returning it. Default true. 572 * @return string|false Script on success, false otherwise. 573 */ 574 public function print_translations( $handle, $echo = true ) { 575 if ( ! isset( $this->registered[ $handle ] ) || empty( $this->registered[ $handle ]->textdomain ) ) { 576 return false; 577 } 578 579 $domain = $this->registered[ $handle ]->textdomain; 580 $path = $this->registered[ $handle ]->translations_path; 581 582 $json_translations = load_script_textdomain( $handle, $domain, $path ); 583 584 if ( ! $json_translations ) { 585 // Register empty locale data object to ensure the domain still exists. 586 $json_translations = '{ "locale_data": { "messages": { "": {} } } }'; 587 } 588 589 $output = <<<JS 590 ( function( domain, translations ) { 591 var localeData = translations.locale_data[ domain ] || translations.locale_data.messages; 592 localeData[""].domain = domain; 593 wp.i18n.setLocaleData( localeData, domain ); 594 } )( "{$domain}", {$json_translations} ); 595 JS; 596 597 if ( $echo ) { 598 printf( "<script%s>\n%s\n</script>\n", $this->type_attr, $output ); 599 } 600 601 return $output; 602 } 603 604 /** 605 * Determines script dependencies. 606 * 607 * @since 2.1.0 608 * 609 * @see WP_Dependencies::all_deps() 610 * 611 * @param string|string[] $handles Item handle (string) or item handles (array of strings). 612 * @param bool $recursion Optional. Internal flag that function is calling itself. 613 * Default false. 614 * @param int|false $group Optional. Group level: level (int), no groups (false). 615 * Default false. 616 * @return bool True on success, false on failure. 617 */ 618 public function all_deps( $handles, $recursion = false, $group = false ) { 619 $r = parent::all_deps( $handles, $recursion, $group ); 620 if ( ! $recursion ) { 621 /** 622 * Filters the list of script dependencies left to print. 623 * 624 * @since 2.3.0 625 * 626 * @param string[] $to_do An array of script dependency handles. 627 */ 628 $this->to_do = apply_filters( 'print_scripts_array', $this->to_do ); 629 } 630 return $r; 631 } 632 633 /** 634 * Processes items and dependencies for the head group. 635 * 636 * @since 2.8.0 637 * 638 * @see WP_Dependencies::do_items() 639 * 640 * @return string[] Handles of items that have been processed. 641 */ 642 public function do_head_items() { 643 $this->do_items( false, 0 ); 644 return $this->done; 645 } 646 647 /** 648 * Processes items and dependencies for the footer group. 649 * 650 * @since 2.8.0 651 * 652 * @see WP_Dependencies::do_items() 653 * 654 * @return string[] Handles of items that have been processed. 655 */ 656 public function do_footer_items() { 657 $this->do_items( false, 1 ); 658 return $this->done; 659 } 660 661 /** 662 * Whether a handle's source is in a default directory. 663 * 664 * @since 2.8.0 665 * 666 * @param string $src The source of the enqueued script. 667 * @return bool True if found, false if not. 668 */ 669 public function in_default_dir( $src ) { 670 if ( ! $this->default_dirs ) { 671 return true; 672 } 673 674 if ( 0 === strpos( $src, '/' . WPINC . '/js/l10n' ) ) { 675 return false; 676 } 677 678 foreach ( (array) $this->default_dirs as $test ) { 679 if ( 0 === strpos( $src, $test ) ) { 680 return true; 681 } 682 } 683 return false; 684 } 685 686 /** 687 * Resets class properties. 688 * 689 * @since 2.8.0 690 */ 691 public function reset() { 692 $this->do_concat = false; 693 $this->print_code = ''; 694 $this->concat = ''; 695 $this->concat_version = ''; 696 $this->print_html = ''; 697 $this->ext_version = ''; 698 $this->ext_handles = ''; 699 } 700 }
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