wp-async-request.php
8 years ago
wp-background-process.php
7 years ago
wptt-webfont-loader.php
2 years ago
wptt-webfont-loader.php
712 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Download webfonts locally. |
| 4 | * |
| 5 | * @package wptt/font-loader |
| 6 | * @license https://opensource.org/licenses/MIT |
| 7 | */ |
| 8 | |
| 9 | if ( ! class_exists( 'WPTT_WebFont_Loader' ) ) { |
| 10 | /** |
| 11 | * Download webfonts locally. |
| 12 | */ |
| 13 | class WPTT_WebFont_Loader { |
| 14 | |
| 15 | /** |
| 16 | * The font-format. |
| 17 | * |
| 18 | * Use "woff" or "woff2". |
| 19 | * This will change the user-agent user to make the request. |
| 20 | * |
| 21 | * @access protected |
| 22 | * @since 1.0.0 |
| 23 | * @var string |
| 24 | */ |
| 25 | protected $font_format = 'woff2'; |
| 26 | |
| 27 | /** |
| 28 | * The remote URL. |
| 29 | * |
| 30 | * @access protected |
| 31 | * @since 1.1.0 |
| 32 | * @var string |
| 33 | */ |
| 34 | protected $remote_url; |
| 35 | |
| 36 | /** |
| 37 | * Base path. |
| 38 | * |
| 39 | * @access protected |
| 40 | * @since 1.1.0 |
| 41 | * @var string |
| 42 | */ |
| 43 | protected $base_path; |
| 44 | |
| 45 | /** |
| 46 | * Base URL. |
| 47 | * |
| 48 | * @access protected |
| 49 | * @since 1.1.0 |
| 50 | * @var string |
| 51 | */ |
| 52 | protected $base_url; |
| 53 | |
| 54 | /** |
| 55 | * Subfolder name. |
| 56 | * |
| 57 | * @access protected |
| 58 | * @since 1.1.0 |
| 59 | * @var string |
| 60 | */ |
| 61 | protected $subfolder_name; |
| 62 | |
| 63 | /** |
| 64 | * The fonts folder. |
| 65 | * |
| 66 | * @access protected |
| 67 | * @since 1.1.0 |
| 68 | * @var string |
| 69 | */ |
| 70 | protected $fonts_folder; |
| 71 | |
| 72 | /** |
| 73 | * The local stylesheet's path. |
| 74 | * |
| 75 | * @access protected |
| 76 | * @since 1.1.0 |
| 77 | * @var string |
| 78 | */ |
| 79 | protected $local_stylesheet_path; |
| 80 | |
| 81 | /** |
| 82 | * The local stylesheet's URL. |
| 83 | * |
| 84 | * @access protected |
| 85 | * @since 1.1.0 |
| 86 | * @var string |
| 87 | */ |
| 88 | protected $local_stylesheet_url; |
| 89 | |
| 90 | /** |
| 91 | * The remote CSS. |
| 92 | * |
| 93 | * @access protected |
| 94 | * @since 1.1.0 |
| 95 | * @var string |
| 96 | */ |
| 97 | protected $remote_styles; |
| 98 | |
| 99 | /** |
| 100 | * The final CSS. |
| 101 | * |
| 102 | * @access protected |
| 103 | * @since 1.1.0 |
| 104 | * @var string |
| 105 | */ |
| 106 | protected $css; |
| 107 | |
| 108 | /** |
| 109 | * Cleanup routine frequency. |
| 110 | */ |
| 111 | const CLEANUP_FREQUENCY = 'monthly'; |
| 112 | |
| 113 | /** |
| 114 | * Constructor. |
| 115 | * |
| 116 | * Get a new instance of the object for a new URL. |
| 117 | * |
| 118 | * @access public |
| 119 | * @since 1.1.0 |
| 120 | * @param string $url The remote URL. |
| 121 | */ |
| 122 | public function __construct( $url = '' ) { |
| 123 | $this->remote_url = $url; |
| 124 | |
| 125 | // Add a cleanup routine. |
| 126 | $this->schedule_cleanup(); |
| 127 | add_action( 'delete_fonts_folder', array( $this, 'delete_fonts_folder' ) ); |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Get the local URL which contains the styles. |
| 132 | * |
| 133 | * Fallback to the remote URL if we were unable to write the file locally. |
| 134 | * |
| 135 | * @access public |
| 136 | * @since 1.1.0 |
| 137 | * @return string |
| 138 | */ |
| 139 | public function get_url() { |
| 140 | |
| 141 | // Check if the local stylesheet exists. |
| 142 | if ( $this->local_file_exists() ) { |
| 143 | |
| 144 | // Attempt to update the stylesheet. Return the local URL on success. |
| 145 | if ( $this->write_stylesheet() ) { |
| 146 | return $this->get_local_stylesheet_url(); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | // If the local file exists, return its URL, with a fallback to the remote URL. |
| 151 | return file_exists( $this->get_local_stylesheet_path() ) |
| 152 | ? $this->get_local_stylesheet_url() |
| 153 | : $this->remote_url; |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Get the local stylesheet URL. |
| 158 | * |
| 159 | * @access public |
| 160 | * @since 1.1.0 |
| 161 | * @return string |
| 162 | */ |
| 163 | public function get_local_stylesheet_url() { |
| 164 | if ( ! $this->local_stylesheet_url ) { |
| 165 | $this->local_stylesheet_url = str_replace( |
| 166 | $this->get_base_path(), |
| 167 | $this->get_base_url(), |
| 168 | $this->get_local_stylesheet_path() |
| 169 | ); |
| 170 | } |
| 171 | return $this->local_stylesheet_url; |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Get styles with fonts downloaded locally. |
| 176 | * |
| 177 | * @access public |
| 178 | * @since 1.0.0 |
| 179 | * @return string |
| 180 | */ |
| 181 | public function get_styles() { |
| 182 | |
| 183 | // If we already have the local file, return its contents. |
| 184 | $local_stylesheet_contents = $this->get_local_stylesheet_contents(); |
| 185 | if ( $local_stylesheet_contents ) { |
| 186 | return $local_stylesheet_contents; |
| 187 | } |
| 188 | |
| 189 | // Get the remote URL contents. |
| 190 | $this->remote_styles = $this->get_remote_url_contents(); |
| 191 | |
| 192 | // Get an array of locally-hosted files. |
| 193 | $files = $this->get_local_files_from_css(); |
| 194 | |
| 195 | // Convert paths to URLs. |
| 196 | foreach ( $files as $remote => $local ) { |
| 197 | $files[ $remote ] = str_replace( |
| 198 | $this->get_base_path(), |
| 199 | $this->get_base_url(), |
| 200 | $local |
| 201 | ); |
| 202 | } |
| 203 | |
| 204 | $this->css = str_replace( |
| 205 | array_keys( $files ), |
| 206 | array_values( $files ), |
| 207 | $this->remote_styles |
| 208 | ); |
| 209 | |
| 210 | $this->write_stylesheet(); |
| 211 | |
| 212 | return $this->css; |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Get local stylesheet contents. |
| 217 | * |
| 218 | * @access public |
| 219 | * @since 1.1.0 |
| 220 | * @return string|false Returns the remote URL contents. |
| 221 | */ |
| 222 | public function get_local_stylesheet_contents() { |
| 223 | $local_path = $this->get_local_stylesheet_path(); |
| 224 | |
| 225 | // Check if the local stylesheet exists. |
| 226 | if ( $this->local_file_exists() ) { |
| 227 | |
| 228 | // Attempt to update the stylesheet. Return false on fail. |
| 229 | if ( ! $this->write_stylesheet() ) { |
| 230 | return false; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | ob_start(); |
| 235 | include $local_path; |
| 236 | return ob_get_clean(); |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Get remote file contents. |
| 241 | * |
| 242 | * @access public |
| 243 | * @since 1.0.0 |
| 244 | * @return string Returns the remote URL contents. |
| 245 | */ |
| 246 | public function get_remote_url_contents() { |
| 247 | |
| 248 | /** |
| 249 | * The user-agent we want to use. |
| 250 | * |
| 251 | * The default user-agent is the only one compatible with woff (not woff2) |
| 252 | * which also supports unicode ranges. |
| 253 | */ |
| 254 | $user_agent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/603.3.8 (KHTML, like Gecko) Version/10.1.2 Safari/603.3.8'; |
| 255 | |
| 256 | // Switch to a user-agent supporting woff2 if we don't need to support IE. |
| 257 | if ( 'woff2' === $this->font_format ) { |
| 258 | $user_agent = 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:73.0) Gecko/20100101 Firefox/73.0'; |
| 259 | } |
| 260 | |
| 261 | // Get the response. |
| 262 | $response = wp_remote_get( $this->remote_url, array( 'user-agent' => $user_agent ) ); |
| 263 | |
| 264 | // Early exit if there was an error. |
| 265 | if ( is_wp_error( $response ) ) { |
| 266 | return ''; |
| 267 | } |
| 268 | |
| 269 | // Get the CSS from our response. |
| 270 | $contents = wp_remote_retrieve_body( $response ); |
| 271 | |
| 272 | return $contents; |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Download files mentioned in our CSS locally. |
| 277 | * |
| 278 | * @access public |
| 279 | * @since 1.0.0 |
| 280 | * @return array Returns an array of remote URLs and their local counterparts. |
| 281 | */ |
| 282 | public function get_local_files_from_css() { |
| 283 | $font_files = $this->get_remote_files_from_css(); |
| 284 | $stored = get_site_option( 'downloaded_font_files', array() ); |
| 285 | $change = false; // If in the end this is true, we need to update the cache option. |
| 286 | |
| 287 | if ( ! defined( 'FS_CHMOD_DIR' ) ) { |
| 288 | define( 'FS_CHMOD_DIR', ( 0755 & ~ umask() ) ); |
| 289 | } |
| 290 | |
| 291 | // If the fonts folder don't exist, create it. |
| 292 | if ( ! file_exists( $this->get_fonts_folder() ) ) { |
| 293 | $this->get_filesystem()->mkdir( $this->get_fonts_folder(), FS_CHMOD_DIR ); |
| 294 | } |
| 295 | |
| 296 | foreach ( $font_files as $font_family => $files ) { |
| 297 | |
| 298 | // The folder path for this font-family. |
| 299 | $folder_path = $this->get_fonts_folder() . '/' . $font_family; |
| 300 | |
| 301 | // If the folder doesn't exist, create it. |
| 302 | if ( ! file_exists( $folder_path ) ) { |
| 303 | $this->get_filesystem()->mkdir( $folder_path, FS_CHMOD_DIR ); |
| 304 | } |
| 305 | |
| 306 | foreach ( $files as $url ) { |
| 307 | |
| 308 | // Get the filename. |
| 309 | $filename = basename( wp_parse_url( $url, PHP_URL_PATH ) ); |
| 310 | $font_path = $folder_path . '/' . $filename; |
| 311 | /** |
| 312 | * In Typekit, the filename will always be the same. We also need to check for query vars in their URLs. |
| 313 | * They provide this font variation description that we can use https://github.com/typekit/fvd |
| 314 | */ |
| 315 | $queries = parse_url( $url, PHP_URL_QUERY ); |
| 316 | if ( ! empty( $queries ) ) { |
| 317 | $query_args = array(); |
| 318 | parse_str( $queries, $query_args ); |
| 319 | if ( array_key_exists( 'fvd', $query_args ) ) { |
| 320 | $font_path .= $query_args['fvd']; |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | // Check if the file already exists. |
| 325 | if ( file_exists( $font_path ) ) { |
| 326 | |
| 327 | // Skip if already cached. |
| 328 | if ( isset( $stored[ $url ] ) ) { |
| 329 | continue; |
| 330 | } |
| 331 | |
| 332 | // Add file to the cache and change the $changed var to indicate we need to update the option. |
| 333 | $stored[ $url ] = $font_path; |
| 334 | $change = true; |
| 335 | |
| 336 | // Since the file exists we don't need to proceed with downloading it. |
| 337 | continue; |
| 338 | } |
| 339 | |
| 340 | /** |
| 341 | * If we got this far, we need to download the file. |
| 342 | */ |
| 343 | |
| 344 | // require file.php if the download_url function doesn't exist. |
| 345 | if ( ! function_exists( 'download_url' ) ) { |
| 346 | require_once wp_normalize_path( ABSPATH . '/wp-admin/includes/file.php' ); |
| 347 | } |
| 348 | |
| 349 | // Download file to temporary location. |
| 350 | $tmp_path = download_url( $url ); |
| 351 | |
| 352 | // Make sure there were no errors. |
| 353 | if ( is_wp_error( $tmp_path ) ) { |
| 354 | continue; |
| 355 | } |
| 356 | |
| 357 | // Move temp file to final destination. |
| 358 | $success = $this->get_filesystem()->move( $tmp_path, $font_path, true ); |
| 359 | if ( $success ) { |
| 360 | $stored[ $url ] = $font_path; |
| 361 | $change = true; |
| 362 | } |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | // If there were changes, update the option. |
| 367 | if ( $change ) { |
| 368 | |
| 369 | // Cleanup the option and then save it. |
| 370 | foreach ( $stored as $url => $path ) { |
| 371 | if ( ! file_exists( $path ) ) { |
| 372 | unset( $stored[ $url ] ); |
| 373 | } |
| 374 | } |
| 375 | update_site_option( 'downloaded_font_files', $stored ); |
| 376 | } |
| 377 | |
| 378 | return $stored; |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * Get font files from the CSS. |
| 383 | * |
| 384 | * @access public |
| 385 | * @since 1.0.0 |
| 386 | * @return array Returns an array of font-families and the font-files used. |
| 387 | */ |
| 388 | public function get_remote_files_from_css() { |
| 389 | |
| 390 | $font_faces = explode( '@font-face', $this->remote_styles ); |
| 391 | |
| 392 | $result = array(); |
| 393 | |
| 394 | // Loop all our font-face declarations. |
| 395 | foreach ( $font_faces as $font_face ) { |
| 396 | |
| 397 | // Make sure we only process styles inside this declaration. |
| 398 | $style = explode( '}', $font_face )[0]; |
| 399 | |
| 400 | // Sanity check. |
| 401 | if ( false === strpos( $style, 'font-family' ) ) { |
| 402 | continue; |
| 403 | } |
| 404 | |
| 405 | // Get an array of our font-families. |
| 406 | preg_match_all( '/font-family.*?\;/', $style, $matched_font_families ); |
| 407 | |
| 408 | // Get an array of our font-files. |
| 409 | preg_match_all( '/url\(.*?\)/i', $style, $matched_font_files ); |
| 410 | |
| 411 | // Get the font-family name. |
| 412 | $font_family = 'unknown'; |
| 413 | if ( isset( $matched_font_families[0] ) && isset( $matched_font_families[0][0] ) ) { |
| 414 | $font_family = rtrim( ltrim( $matched_font_families[0][0], 'font-family:' ), ';' ); |
| 415 | $font_family = trim( str_replace( array( "'", ';' ), '', $font_family ) ); |
| 416 | $font_family = sanitize_key( strtolower( str_replace( ' ', '-', $font_family ) ) ); |
| 417 | } |
| 418 | |
| 419 | // Make sure the font-family is set in our array. |
| 420 | if ( ! isset( $result[ $font_family ] ) ) { |
| 421 | $result[ $font_family ] = array(); |
| 422 | } |
| 423 | |
| 424 | // Get files for this font-family and add them to the array. |
| 425 | foreach ( $matched_font_files as $match ) { |
| 426 | |
| 427 | // Sanity check. |
| 428 | if ( ! isset( $match[0] ) ) { |
| 429 | continue; |
| 430 | } |
| 431 | |
| 432 | // Add the file URL. |
| 433 | $font_family_url = rtrim( ltrim( $match[0], 'url(' ), ')' ); |
| 434 | $font_family_url = str_replace( '"', '', $font_family_url ); |
| 435 | |
| 436 | // Make sure to convert relative URLs to absolute. |
| 437 | $font_family_url = $this->get_absolute_path( $font_family_url ); |
| 438 | |
| 439 | $result[ $font_family ][] = $font_family_url; |
| 440 | } |
| 441 | |
| 442 | // Make sure we have unique items. |
| 443 | // We're using array_flip here instead of array_unique for improved performance. |
| 444 | $result[ $font_family ] = array_flip( array_flip( $result[ $font_family ] ) ); |
| 445 | } |
| 446 | |
| 447 | return $result; |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * Write the CSS to the filesystem. |
| 452 | * |
| 453 | * @access protected |
| 454 | * @since 1.1.0 |
| 455 | * @return string|false Returns the absolute path of the file on success, or false on fail. |
| 456 | */ |
| 457 | protected function write_stylesheet() { |
| 458 | $file_path = $this->get_local_stylesheet_path(); |
| 459 | $filesystem = $this->get_filesystem(); |
| 460 | |
| 461 | if ( ! defined( 'FS_CHMOD_DIR' ) ) { |
| 462 | define( 'FS_CHMOD_DIR', ( 0755 & ~ umask() ) ); |
| 463 | } |
| 464 | |
| 465 | // If the folder doesn't exist, create it. |
| 466 | if ( ! file_exists( $this->get_fonts_folder() ) ) { |
| 467 | $this->get_filesystem()->mkdir( $this->get_fonts_folder(), FS_CHMOD_DIR ); |
| 468 | } |
| 469 | |
| 470 | // If the file doesn't exist, create it. Return false if it can not be created. |
| 471 | if ( ! $filesystem->exists( $file_path ) && ! $filesystem->touch( $file_path ) ) { |
| 472 | return false; |
| 473 | } |
| 474 | |
| 475 | // If we got this far, we need to write the file. |
| 476 | // Get the CSS. |
| 477 | if ( ! $this->css ) { |
| 478 | $this->get_styles(); |
| 479 | } |
| 480 | |
| 481 | // Put the contents in the file. Return false if that fails. |
| 482 | if ( ! $filesystem->put_contents( $file_path, $this->css ) ) { |
| 483 | return false; |
| 484 | } |
| 485 | |
| 486 | return $file_path; |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * Get the stylesheet path. |
| 491 | * |
| 492 | * @access public |
| 493 | * @since 1.1.0 |
| 494 | * @return string |
| 495 | */ |
| 496 | public function get_local_stylesheet_path() { |
| 497 | if ( ! $this->local_stylesheet_path ) { |
| 498 | $this->local_stylesheet_path = $this->get_fonts_folder() . '/' . $this->get_local_stylesheet_filename() . '.css'; |
| 499 | } |
| 500 | return $this->local_stylesheet_path; |
| 501 | } |
| 502 | |
| 503 | /** |
| 504 | * Get the local stylesheet filename. |
| 505 | * |
| 506 | * This is a hash, generated from the site-URL, the wp-content path and the URL. |
| 507 | * This way we can avoid issues with sites changing their URL, or the wp-content path etc. |
| 508 | * |
| 509 | * @access public |
| 510 | * @since 1.1.0 |
| 511 | * @return string |
| 512 | */ |
| 513 | public function get_local_stylesheet_filename() { |
| 514 | return md5( $this->get_base_url() . $this->get_base_path() . $this->remote_url . $this->font_format ); |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * Set the font-format to be used. |
| 519 | * |
| 520 | * @access public |
| 521 | * @since 1.0.0 |
| 522 | * @param string $format The format to be used. Use "woff" or "woff2". |
| 523 | * @return void |
| 524 | */ |
| 525 | public function set_font_format( $format = 'woff2' ) { |
| 526 | $this->font_format = $format; |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * Check if the local stylesheet exists. |
| 531 | * |
| 532 | * @access public |
| 533 | * @since 1.1.0 |
| 534 | * @return bool |
| 535 | */ |
| 536 | public function local_file_exists() { |
| 537 | return ( ! file_exists( $this->get_local_stylesheet_path() ) ); |
| 538 | } |
| 539 | |
| 540 | /** |
| 541 | * Get the base path. |
| 542 | * |
| 543 | * @access public |
| 544 | * @since 1.1.0 |
| 545 | * @return string |
| 546 | */ |
| 547 | public function get_base_path() { |
| 548 | if ( ! $this->base_path ) { |
| 549 | $this->base_path = apply_filters( 'wptt_get_local_fonts_base_path', $this->get_filesystem()->wp_content_dir() ); |
| 550 | } |
| 551 | return $this->base_path; |
| 552 | } |
| 553 | |
| 554 | /** |
| 555 | * Get the base URL. |
| 556 | * |
| 557 | * @access public |
| 558 | * @since 1.1.0 |
| 559 | * @return string |
| 560 | */ |
| 561 | public function get_base_url() { |
| 562 | if ( ! $this->base_url ) { |
| 563 | $this->base_url = apply_filters( 'wptt_get_local_fonts_base_url', content_url() ); |
| 564 | } |
| 565 | return $this->base_url; |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * Get the subfolder name. |
| 570 | * |
| 571 | * @access public |
| 572 | * @since 1.1.0 |
| 573 | * @return string |
| 574 | */ |
| 575 | public function get_subfolder_name() { |
| 576 | if ( ! $this->subfolder_name ) { |
| 577 | $this->subfolder_name = apply_filters( 'wptt_get_local_fonts_subfolder_name', 'fonts' ); |
| 578 | } |
| 579 | return $this->subfolder_name; |
| 580 | } |
| 581 | |
| 582 | /** |
| 583 | * Get the folder for fonts. |
| 584 | * |
| 585 | * @access public |
| 586 | * @return string |
| 587 | */ |
| 588 | public function get_fonts_folder() { |
| 589 | if ( ! $this->fonts_folder ) { |
| 590 | $this->fonts_folder = $this->get_base_path(); |
| 591 | if ( $this->get_subfolder_name() ) { |
| 592 | $this->fonts_folder .= '/' . $this->get_subfolder_name(); |
| 593 | } |
| 594 | } |
| 595 | return $this->fonts_folder; |
| 596 | } |
| 597 | |
| 598 | /** |
| 599 | * Schedule a cleanup. |
| 600 | * |
| 601 | * Deletes the fonts files on a regular basis. |
| 602 | * This way font files will get updated regularly, |
| 603 | * and we avoid edge cases where unused files remain in the server. |
| 604 | * |
| 605 | * @access public |
| 606 | * @since 1.1.0 |
| 607 | * @return void |
| 608 | */ |
| 609 | public function schedule_cleanup() { |
| 610 | if ( ! is_multisite() || ( is_multisite() && is_main_site() ) ) { |
| 611 | if ( ! wp_next_scheduled( 'delete_fonts_folder' ) && ! wp_installing() ) { |
| 612 | wp_schedule_event( time(), self::CLEANUP_FREQUENCY, 'delete_fonts_folder' ); |
| 613 | } |
| 614 | } |
| 615 | } |
| 616 | |
| 617 | /** |
| 618 | * Delete the fonts folder. |
| 619 | * |
| 620 | * This runs as part of a cleanup routine. |
| 621 | * |
| 622 | * @access public |
| 623 | * @since 1.1.0 |
| 624 | * @return bool |
| 625 | */ |
| 626 | public function delete_fonts_folder() { |
| 627 | return $this->get_filesystem()->delete( $this->get_fonts_folder(), true ); |
| 628 | } |
| 629 | |
| 630 | /** |
| 631 | * Get the filesystem. |
| 632 | * |
| 633 | * @access protected |
| 634 | * @since 1.0.0 |
| 635 | * @return \WP_Filesystem_Base |
| 636 | */ |
| 637 | protected function get_filesystem() { |
| 638 | global $wp_filesystem; |
| 639 | |
| 640 | // If the filesystem has not been instantiated yet, do it here. |
| 641 | if ( ! $wp_filesystem ) { |
| 642 | if ( ! function_exists( 'WP_Filesystem' ) ) { |
| 643 | require_once wp_normalize_path( ABSPATH . '/wp-admin/includes/file.php' ); |
| 644 | } |
| 645 | WP_Filesystem(); |
| 646 | } |
| 647 | return $wp_filesystem; |
| 648 | } |
| 649 | |
| 650 | /** |
| 651 | * Get an absolute URL from a relative URL. |
| 652 | * |
| 653 | * @access protected |
| 654 | * |
| 655 | * @param string $url The URL. |
| 656 | * |
| 657 | * @return string |
| 658 | */ |
| 659 | protected function get_absolute_path( $url ) { |
| 660 | |
| 661 | // If dealing with a root-relative URL. |
| 662 | if ( 0 === stripos( $url, '/' ) ) { |
| 663 | $parsed_url = parse_url( $this->remote_url ); |
| 664 | return $parsed_url['scheme'] . '://' . $parsed_url['hostname'] . $url; |
| 665 | } |
| 666 | |
| 667 | return $url; |
| 668 | } |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | if ( ! function_exists( 'wptt_get_webfont_styles' ) ) { |
| 673 | /** |
| 674 | * Get styles for a webfont. |
| 675 | * |
| 676 | * This will get the CSS from the remote API, |
| 677 | * download any fonts it contains, |
| 678 | * replace references to remote URLs with locally-downloaded assets, |
| 679 | * and finally return the resulting CSS. |
| 680 | * |
| 681 | * @since 1.0.0 |
| 682 | * |
| 683 | * @param string $url The URL of the remote webfont. |
| 684 | * @param string $format The font-format. If you need to support IE, change this to "woff". |
| 685 | * |
| 686 | * @return string Returns the CSS. |
| 687 | */ |
| 688 | function wptt_get_webfont_styles( $url, $format = 'woff2' ) { |
| 689 | $font = new WPTT_WebFont_Loader( $url ); |
| 690 | $font->set_font_format( $format ); |
| 691 | return $font->get_styles(); |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | if ( ! function_exists( 'wptt_get_webfont_url' ) ) { |
| 696 | /** |
| 697 | * Get a stylesheet URL for a webfont. |
| 698 | * |
| 699 | * @since 1.1.0 |
| 700 | * |
| 701 | * @param string $url The URL of the remote webfont. |
| 702 | * @param string $format The font-format. If you need to support IE, change this to "woff". |
| 703 | * |
| 704 | * @return string Returns the CSS. |
| 705 | */ |
| 706 | function wptt_get_webfont_url( $url, $format = 'woff2' ) { |
| 707 | $font = new WPTT_WebFont_Loader( $url ); |
| 708 | $font->set_font_format( $format ); |
| 709 | return $font->get_url(); |
| 710 | } |
| 711 | } |
| 712 |