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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 active 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 $wp_scripts WP_Scripts instance (passed by reference). 166 */ 167 do_action_ref_array( 'wp_default_scripts', array( &$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, $group ); 187 } 188 189 /** 190 * Prints extra scripts of a registered script. 191 * 192 * @since 2.1.0 193 * @since 2.8.0 Added the `$display` 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 $display Optional. Whether to print the extra script 200 * instead of just returning it. Default true. 201 * @return bool|string|void Void if no data exists, extra scripts if `$display` is true, 202 * true otherwise. 203 */ 204 public function print_scripts_l10n( $handle, $display = true ) { 205 _deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' ); 206 return $this->print_extra_script( $handle, $display ); 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 $display Optional. Whether to print the extra script 216 * instead of just returning it. Default true. 217 * @return bool|string|void Void if no data exists, extra scripts if `$display` is true, 218 * true otherwise. 219 */ 220 public function print_extra_script( $handle, $display = true ) { 221 $output = $this->get_data( $handle, 'data' ); 222 if ( ! $output ) { 223 return; 224 } 225 226 if ( ! $display ) { 227 return $output; 228 } 229 230 printf( "<script%s id='%s-js-extra'>\n", $this->type_attr, esc_attr( $handle ) ); 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 id='%s-js-before'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $before_handle ); 302 } 303 304 if ( $after_handle ) { 305 $after_handle = sprintf( "<script%s id='%s-js-after'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $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 /* 315 * Prevent concatenation of scripts if the text domain is defined 316 * to ensure the dependency order is respected. 317 */ 318 $translations_stop_concat = ! empty( $obj->textdomain ); 319 320 $translations = $this->print_translations( $handle, false ); 321 if ( $translations ) { 322 $translations = sprintf( "<script%s id='%s-js-translations'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $translations ); 323 } 324 325 if ( $this->do_concat ) { 326 /** 327 * Filters the script loader source. 328 * 329 * @since 2.2.0 330 * 331 * @param string $src Script loader source path. 332 * @param string $handle Script handle. 333 */ 334 $srce = apply_filters( 'script_loader_src', $src, $handle ); 335 336 if ( $this->in_default_dir( $srce ) && ( $before_handle || $after_handle || $translations_stop_concat ) ) { 337 $this->do_concat = false; 338 339 // Have to print the so-far concatenated scripts right away to maintain the right order. 340 _print_scripts(); 341 $this->reset(); 342 } elseif ( $this->in_default_dir( $srce ) && ! $conditional ) { 343 $this->print_code .= $this->print_extra_script( $handle, false ); 344 $this->concat .= "$handle,"; 345 $this->concat_version .= "$handle$ver"; 346 return true; 347 } else { 348 $this->ext_handles .= "$handle,"; 349 $this->ext_version .= "$handle$ver"; 350 } 351 } 352 353 $has_conditional_data = $conditional && $this->get_data( $handle, 'data' ); 354 355 if ( $has_conditional_data ) { 356 echo $cond_before; 357 } 358 359 $this->print_extra_script( $handle ); 360 361 if ( $has_conditional_data ) { 362 echo $cond_after; 363 } 364 365 // A single item may alias a set of items, by having dependencies, but no source. 366 if ( ! $src ) { 367 if ( $inline_script_tag ) { 368 if ( $this->do_concat ) { 369 $this->print_html .= $inline_script_tag; 370 } else { 371 echo $inline_script_tag; 372 } 373 } 374 375 return true; 376 } 377 378 if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && 0 === strpos( $src, $this->content_url ) ) ) { 379 $src = $this->base_url . $src; 380 } 381 382 if ( ! empty( $ver ) ) { 383 $src = add_query_arg( 'ver', $ver, $src ); 384 } 385 386 /** This filter is documented in wp-includes/class.wp-scripts.php */ 387 $src = esc_url( apply_filters( 'script_loader_src', $src, $handle ) ); 388 389 if ( ! $src ) { 390 return true; 391 } 392 393 $tag = $translations . $cond_before . $before_handle; 394 $tag .= sprintf( "<script%s src='%s' id='%s-js'></script>\n", $this->type_attr, $src, esc_attr( $handle ) ); 395 $tag .= $after_handle . $cond_after; 396 397 /** 398 * Filters the HTML script tag of an enqueued script. 399 * 400 * @since 4.1.0 401 * 402 * @param string $tag The `<script>` tag for the enqueued script. 403 * @param string $handle The script's registered handle. 404 * @param string $src The script's source URL. 405 */ 406 $tag = apply_filters( 'script_loader_tag', $tag, $handle, $src ); 407 408 if ( $this->do_concat ) { 409 $this->print_html .= $tag; 410 } else { 411 echo $tag; 412 } 413 414 return true; 415 } 416 417 /** 418 * Adds extra code to a registered script. 419 * 420 * @since 4.5.0 421 * 422 * @param string $handle Name of the script to add the inline script to. 423 * Must be lowercase. 424 * @param string $data String containing the JavaScript to be added. 425 * @param string $position Optional. Whether to add the inline script 426 * before the handle or after. Default 'after'. 427 * @return bool True on success, false on failure. 428 */ 429 public function add_inline_script( $handle, $data, $position = 'after' ) { 430 if ( ! $data ) { 431 return false; 432 } 433 434 if ( 'after' !== $position ) { 435 $position = 'before'; 436 } 437 438 $script = (array) $this->get_data( $handle, $position ); 439 $script[] = $data; 440 441 return $this->add_data( $handle, $position, $script ); 442 } 443 444 /** 445 * Prints inline scripts registered for a specific handle. 446 * 447 * @since 4.5.0 448 * 449 * @param string $handle Name of the script to add the inline script to. 450 * Must be lowercase. 451 * @param string $position Optional. Whether to add the inline script 452 * before the handle or after. Default 'after'. 453 * @param bool $display Optional. Whether to print the script 454 * instead of just returning it. Default true. 455 * @return string|false Script on success, false otherwise. 456 */ 457 public function print_inline_script( $handle, $position = 'after', $display = true ) { 458 $output = $this->get_data( $handle, $position ); 459 460 if ( empty( $output ) ) { 461 return false; 462 } 463 464 $output = trim( implode( "\n", $output ), "\n" ); 465 466 if ( $display ) { 467 printf( "<script%s id='%s-js-%s'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), esc_attr( $position ), $output ); 468 } 469 470 return $output; 471 } 472 473 /** 474 * Localizes a script, only if the script has already been added. 475 * 476 * @since 2.1.0 477 * 478 * @param string $handle Name of the script to attach data to. 479 * @param string $object_name Name of the variable that will contain the data. 480 * @param array $l10n Array of data to localize. 481 * @return bool True on success, false on failure. 482 */ 483 public function localize( $handle, $object_name, $l10n ) { 484 if ( 'jquery' === $handle ) { 485 $handle = 'jquery-core'; 486 } 487 488 if ( is_array( $l10n ) && isset( $l10n['l10n_print_after'] ) ) { // back compat, preserve the code in 'l10n_print_after' if present. 489 $after = $l10n['l10n_print_after']; 490 unset( $l10n['l10n_print_after'] ); 491 } 492 493 if ( ! is_array( $l10n ) ) { 494 _doing_it_wrong( 495 __METHOD__, 496 sprintf( 497 /* translators: 1: $l10n, 2: wp_add_inline_script() */ 498 __( 'The %1$s parameter must be an array. To pass arbitrary data to scripts, use the %2$s function instead.' ), 499 '<code>$l10n</code>', 500 '<code>wp_add_inline_script()</code>' 501 ), 502 '5.7.0' 503 ); 504 } 505 506 if ( is_string( $l10n ) ) { 507 $l10n = html_entity_decode( $l10n, ENT_QUOTES, 'UTF-8' ); 508 } else { 509 foreach ( (array) $l10n as $key => $value ) { 510 if ( ! is_scalar( $value ) ) { 511 continue; 512 } 513 514 $l10n[ $key ] = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8' ); 515 } 516 } 517 518 $script = "var $object_name = " . wp_json_encode( $l10n ) . ';'; 519 520 if ( ! empty( $after ) ) { 521 $script .= "\n$after;"; 522 } 523 524 $data = $this->get_data( $handle, 'data' ); 525 526 if ( ! empty( $data ) ) { 527 $script = "$data\n$script"; 528 } 529 530 return $this->add_data( $handle, 'data', $script ); 531 } 532 533 /** 534 * Sets handle group. 535 * 536 * @since 2.8.0 537 * 538 * @see WP_Dependencies::set_group() 539 * 540 * @param string $handle Name of the item. Should be unique. 541 * @param bool $recursion Internal flag that calling function was called recursively. 542 * @param int|false $group Optional. Group level: level (int), no groups (false). 543 * Default false. 544 * @return bool Not already in the group or a lower group. 545 */ 546 public function set_group( $handle, $recursion, $group = false ) { 547 if ( isset( $this->registered[ $handle ]->args ) && 1 === $this->registered[ $handle ]->args ) { 548 $grp = 1; 549 } else { 550 $grp = (int) $this->get_data( $handle, 'group' ); 551 } 552 553 if ( false !== $group && $grp > $group ) { 554 $grp = $group; 555 } 556 557 return parent::set_group( $handle, $recursion, $grp ); 558 } 559 560 /** 561 * Sets a translation textdomain. 562 * 563 * @since 5.0.0 564 * @since 5.1.0 The `$domain` parameter was made optional. 565 * 566 * @param string $handle Name of the script to register a translation domain to. 567 * @param string $domain Optional. Text domain. Default 'default'. 568 * @param string $path Optional. The full file path to the directory containing translation files. 569 * @return bool True if the text domain was registered, false if not. 570 */ 571 public function set_translations( $handle, $domain = 'default', $path = null ) { 572 if ( ! isset( $this->registered[ $handle ] ) ) { 573 return false; 574 } 575 576 /** @var \_WP_Dependency $obj */ 577 $obj = $this->registered[ $handle ]; 578 579 if ( ! in_array( 'wp-i18n', $obj->deps, true ) ) { 580 $obj->deps[] = 'wp-i18n'; 581 } 582 583 return $obj->set_translations( $domain, $path ); 584 } 585 586 /** 587 * Prints translations set for a specific handle. 588 * 589 * @since 5.0.0 590 * 591 * @param string $handle Name of the script to add the inline script to. 592 * Must be lowercase. 593 * @param bool $display Optional. Whether to print the script 594 * instead of just returning it. Default true. 595 * @return string|false Script on success, false otherwise. 596 */ 597 public function print_translations( $handle, $display = true ) { 598 if ( ! isset( $this->registered[ $handle ] ) || empty( $this->registered[ $handle ]->textdomain ) ) { 599 return false; 600 } 601 602 $domain = $this->registered[ $handle ]->textdomain; 603 $path = $this->registered[ $handle ]->translations_path; 604 605 $json_translations = load_script_textdomain( $handle, $domain, $path ); 606 607 if ( ! $json_translations ) { 608 return false; 609 } 610 611 $output = <<<JS 612 ( function( domain, translations ) { 613 var localeData = translations.locale_data[ domain ] || translations.locale_data.messages; 614 localeData[""].domain = domain; 615 wp.i18n.setLocaleData( localeData, domain ); 616 } )( "{$domain}", {$json_translations} ); 617 JS; 618 619 if ( $display ) { 620 printf( "<script%s id='%s-js-translations'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $output ); 621 } 622 623 return $output; 624 } 625 626 /** 627 * Determines script dependencies. 628 * 629 * @since 2.1.0 630 * 631 * @see WP_Dependencies::all_deps() 632 * 633 * @param string|string[] $handles Item handle (string) or item handles (array of strings). 634 * @param bool $recursion Optional. Internal flag that function is calling itself. 635 * Default false. 636 * @param int|false $group Optional. Group level: level (int), no groups (false). 637 * Default false. 638 * @return bool True on success, false on failure. 639 */ 640 public function all_deps( $handles, $recursion = false, $group = false ) { 641 $r = parent::all_deps( $handles, $recursion, $group ); 642 if ( ! $recursion ) { 643 /** 644 * Filters the list of script dependencies left to print. 645 * 646 * @since 2.3.0 647 * 648 * @param string[] $to_do An array of script dependency handles. 649 */ 650 $this->to_do = apply_filters( 'print_scripts_array', $this->to_do ); 651 } 652 return $r; 653 } 654 655 /** 656 * Processes items and dependencies for the head group. 657 * 658 * @since 2.8.0 659 * 660 * @see WP_Dependencies::do_items() 661 * 662 * @return string[] Handles of items that have been processed. 663 */ 664 public function do_head_items() { 665 $this->do_items( false, 0 ); 666 return $this->done; 667 } 668 669 /** 670 * Processes items and dependencies for the footer group. 671 * 672 * @since 2.8.0 673 * 674 * @see WP_Dependencies::do_items() 675 * 676 * @return string[] Handles of items that have been processed. 677 */ 678 public function do_footer_items() { 679 $this->do_items( false, 1 ); 680 return $this->done; 681 } 682 683 /** 684 * Whether a handle's source is in a default directory. 685 * 686 * @since 2.8.0 687 * 688 * @param string $src The source of the enqueued script. 689 * @return bool True if found, false if not. 690 */ 691 public function in_default_dir( $src ) { 692 if ( ! $this->default_dirs ) { 693 return true; 694 } 695 696 if ( 0 === strpos( $src, '/' . WPINC . '/js/l10n' ) ) { 697 return false; 698 } 699 700 foreach ( (array) $this->default_dirs as $test ) { 701 if ( 0 === strpos( $src, $test ) ) { 702 return true; 703 } 704 } 705 return false; 706 } 707 708 /** 709 * Resets class properties. 710 * 711 * @since 2.8.0 712 */ 713 public function reset() { 714 $this->do_concat = false; 715 $this->print_code = ''; 716 $this->concat = ''; 717 $this->concat_version = ''; 718 $this->print_html = ''; 719 $this->ext_version = ''; 720 $this->ext_handles = ''; 721 } 722 }
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