class.photon.php
| 1 | <?php |
| 2 | |
| 3 | class Jetpack_Photon { |
| 4 | /** |
| 5 | * Class variables |
| 6 | */ |
| 7 | // Oh look, a singleton |
| 8 | private static $__instance = null; |
| 9 | |
| 10 | // Allowed extensions must match http://code.trac.wordpress.org/browser/photon/index.php#L31 |
| 11 | protected static $extensions = array( |
| 12 | 'gif', |
| 13 | 'jpg', |
| 14 | 'jpeg', |
| 15 | 'png' |
| 16 | ); |
| 17 | |
| 18 | // Don't access this directly. Instead, use self::image_sizes() so it's actually populated with something. |
| 19 | protected static $image_sizes = null; |
| 20 | |
| 21 | /** |
| 22 | * Singleton implementation |
| 23 | * |
| 24 | * @return object |
| 25 | */ |
| 26 | public static function instance() { |
| 27 | if ( ! is_a( self::$__instance, 'Jetpack_Photon' ) ) { |
| 28 | self::$__instance = new Jetpack_Photon; |
| 29 | self::$__instance->setup(); |
| 30 | } |
| 31 | |
| 32 | return self::$__instance; |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * Silence is golden. |
| 37 | */ |
| 38 | private function __construct() {} |
| 39 | |
| 40 | /** |
| 41 | * Register actions and filters, but only if basic Photon functions are available. |
| 42 | * The basic functions are found in ./functions.photon.php. |
| 43 | * |
| 44 | * @uses add_action, add_filter |
| 45 | * @return null |
| 46 | */ |
| 47 | private function setup() { |
| 48 | // Display warning if site is private |
| 49 | add_action( 'jetpack_activate_module_photon', array( $this, 'action_jetpack_activate_module_photon' ) ); |
| 50 | |
| 51 | if ( ! function_exists( 'jetpack_photon_url' ) ) |
| 52 | return; |
| 53 | |
| 54 | // Images in post content and galleries |
| 55 | add_filter( 'the_content', array( __CLASS__, 'filter_the_content' ), 999999 ); |
| 56 | add_filter( 'get_post_galleries', array( __CLASS__, 'filter_the_galleries' ), 999999 ); |
| 57 | |
| 58 | // Core image retrieval |
| 59 | add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), 10, 3 ); |
| 60 | |
| 61 | // Helpers for maniuplated images |
| 62 | add_action( 'wp_enqueue_scripts', array( $this, 'action_wp_enqueue_scripts' ), 9 ); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Check if site is private and warn user if it is |
| 67 | * |
| 68 | * @uses Jetpack::check_privacy |
| 69 | * @action jetpack_activate_module_photon |
| 70 | * @return null |
| 71 | */ |
| 72 | public function action_jetpack_activate_module_photon() { |
| 73 | Jetpack::check_privacy( __FILE__ ); |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | ** IN-CONTENT IMAGE MANIPULATION FUNCTIONS |
| 78 | **/ |
| 79 | |
| 80 | /** |
| 81 | * Match all images and any relevant <a> tags in a block of HTML. |
| 82 | * |
| 83 | * @param string $content Some HTML. |
| 84 | * @return array An array of $images matches, where $images[0] is |
| 85 | * an array of full matches, and the link_url, img_tag, |
| 86 | * and img_url keys are arrays of those matches. |
| 87 | */ |
| 88 | public static function parse_images_from_html( $content ) { |
| 89 | $images = array(); |
| 90 | |
| 91 | if ( preg_match_all( '#(?:<a[^>]+?href=["|\'](?P<link_url>[^\s]+?)["|\'][^>]*?>\s*)?(?P<img_tag><img[^>]+?src=["|\'](?P<img_url>[^\s]+?)["|\'].*?>){1}(?:\s*</a>)?#is', $content, $images ) ) { |
| 92 | foreach ( $images as $key => $unused ) { |
| 93 | // Simplify the output as much as possible, mostly for confirming test results. |
| 94 | if ( is_numeric( $key ) && $key > 0 ) |
| 95 | unset( $images[$key] ); |
| 96 | } |
| 97 | |
| 98 | return $images; |
| 99 | } |
| 100 | |
| 101 | return array(); |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Try to determine height and width from strings WP appends to resized image filenames. |
| 106 | * |
| 107 | * @param string $src The image URL. |
| 108 | * @return array An array consisting of width and height. |
| 109 | */ |
| 110 | public static function parse_dimensions_from_filename( $src ) { |
| 111 | $width_height_string = array(); |
| 112 | |
| 113 | if ( preg_match( '#-(\d+)x(\d+)\.(?:' . implode('|', self::$extensions ) . '){1}$#i', $src, $width_height_string ) ) { |
| 114 | $width = (int) $width_height_string[1]; |
| 115 | $height = (int) $width_height_string[2]; |
| 116 | |
| 117 | if ( $width && $height ) |
| 118 | return array( $width, $height ); |
| 119 | } |
| 120 | |
| 121 | return array( false, false ); |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Identify images in post content, and if images are local (uploaded to the current site), pass through Photon. |
| 126 | * |
| 127 | * @param string $content |
| 128 | * @uses self::validate_image_url, apply_filters, jetpack_photon_url, esc_url |
| 129 | * @filter the_content |
| 130 | * @return string |
| 131 | */ |
| 132 | public static function filter_the_content( $content ) { |
| 133 | $images = Jetpack_Photon::parse_images_from_html( $content ); |
| 134 | |
| 135 | if ( ! empty( $images ) ) { |
| 136 | $content_width = Jetpack::get_content_width(); |
| 137 | |
| 138 | $image_sizes = self::image_sizes(); |
| 139 | $upload_dir = wp_upload_dir(); |
| 140 | |
| 141 | foreach ( $images[0] as $index => $tag ) { |
| 142 | // Default to resize, though fit may be used in certain cases where a dimension cannot be ascertained |
| 143 | $transform = 'resize'; |
| 144 | |
| 145 | // Start with a clean attachment ID each time |
| 146 | $attachment_id = false; |
| 147 | |
| 148 | // Flag if we need to munge a fullsize URL |
| 149 | $fullsize_url = false; |
| 150 | |
| 151 | // Identify image source |
| 152 | $src = $src_orig = $images['img_url'][ $index ]; |
| 153 | |
| 154 | // Allow specific images to be skipped |
| 155 | if ( apply_filters( 'jetpack_photon_skip_image', false, $src, $tag ) ) |
| 156 | continue; |
| 157 | |
| 158 | // Support Automattic's Lazy Load plugin |
| 159 | // Can't modify $tag yet as we need unadulterated version later |
| 160 | if ( preg_match( '#data-lazy-src=["|\'](.+?)["|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) { |
| 161 | $placeholder_src = $placeholder_src_orig = $src; |
| 162 | $src = $src_orig = $lazy_load_src[1]; |
| 163 | } elseif ( preg_match( '#data-lazy-original=["|\'](.+?)["|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) { |
| 164 | $placeholder_src = $placeholder_src_orig = $src; |
| 165 | $src = $src_orig = $lazy_load_src[1]; |
| 166 | } |
| 167 | |
| 168 | // Check if image URL should be used with Photon |
| 169 | if ( self::validate_image_url( $src ) ) { |
| 170 | // Find the width and height attributes |
| 171 | $width = $height = false; |
| 172 | |
| 173 | // First, check the image tag |
| 174 | if ( preg_match( '#width=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $width_string ) ) |
| 175 | $width = $width_string[1]; |
| 176 | |
| 177 | if ( preg_match( '#height=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $height_string ) ) |
| 178 | $height = $height_string[1]; |
| 179 | |
| 180 | // Can't pass both a relative width and height, so unset the height in favor of not breaking the horizontal layout. |
| 181 | if ( false !== strpos( $width, '%' ) && false !== strpos( $height, '%' ) ) |
| 182 | $width = $height = false; |
| 183 | |
| 184 | // Detect WP registered image size from HTML class |
| 185 | if ( preg_match( '#class=["|\']?[^"\']*size-([^"\'\s]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $size ) ) { |
| 186 | $size = array_pop( $size ); |
| 187 | |
| 188 | if ( false === $width && false === $height && 'full' != $size && array_key_exists( $size, $image_sizes ) ) { |
| 189 | $width = (int) $image_sizes[ $size ]['width']; |
| 190 | $height = (int) $image_sizes[ $size ]['height']; |
| 191 | $transform = $image_sizes[ $size ]['crop'] ? 'resize' : 'fit'; |
| 192 | } |
| 193 | } else { |
| 194 | unset( $size ); |
| 195 | } |
| 196 | |
| 197 | // WP Attachment ID, if uploaded to this site |
| 198 | if ( preg_match( '#class=["|\']?[^"\']*wp-image-([\d]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $attachment_id ) && ( 0 === strpos( $src, $upload_dir['baseurl'] ) || apply_filters( 'jetpack_photon_image_is_local', false, compact( 'src', 'tag', 'images', 'index' ) ) ) ) { |
| 199 | $attachment_id = intval( array_pop( $attachment_id ) ); |
| 200 | |
| 201 | if ( $attachment_id ) { |
| 202 | $attachment = get_post( $attachment_id ); |
| 203 | |
| 204 | // Basic check on returned post object |
| 205 | if ( is_object( $attachment ) && ! is_wp_error( $attachment ) && 'attachment' == $attachment->post_type ) { |
| 206 | $src_per_wp = wp_get_attachment_image_src( $attachment_id, isset( $size ) ? $size : 'full' ); |
| 207 | |
| 208 | if ( self::validate_image_url( $src_per_wp[0] ) ) { |
| 209 | $src = $src_per_wp[0]; |
| 210 | $fullsize_url = true; |
| 211 | |
| 212 | // Prevent image distortion if a detected dimension exceeds the image's natural dimensions |
| 213 | if ( ( false !== $width && $width > $src_per_wp[1] ) || ( false !== $height && $height > $src_per_wp[2] ) ) { |
| 214 | $width = false == $width ? false : min( $width, $src_per_wp[1] ); |
| 215 | $height = false == $height ? false : min( $height, $src_per_wp[2] ); |
| 216 | } |
| 217 | |
| 218 | // If no width and height are found, max out at source image's natural dimensions |
| 219 | // Otherwise, respect registered image sizes' cropping setting |
| 220 | if ( false == $width && false == $height ) { |
| 221 | $width = $src_per_wp[1]; |
| 222 | $height = $src_per_wp[2]; |
| 223 | $transform = 'fit'; |
| 224 | } elseif ( isset( $size ) && array_key_exists( $size, $image_sizes ) && isset( $image_sizes[ $size ]['crop'] ) ) { |
| 225 | $transform = (bool) $image_sizes[ $size ]['crop'] ? 'resize' : 'fit'; |
| 226 | } |
| 227 | } |
| 228 | } else { |
| 229 | unset( $attachment_id ); |
| 230 | unset( $attachment ); |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | // If image tag lacks width and height arguments, try to determine from strings WP appends to resized image filenames. |
| 236 | if ( false === $width && false === $height ) { |
| 237 | list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $src ); |
| 238 | } |
| 239 | |
| 240 | // If width is available, constrain to $content_width |
| 241 | if ( false !== $width && false === strpos( $width, '%' ) && is_numeric( $content_width ) ) { |
| 242 | if ( $width > $content_width && false !== $height && false === strpos( $height, '%' ) ) { |
| 243 | $height = round( ( $content_width * $height ) / $width ); |
| 244 | $width = $content_width; |
| 245 | } elseif ( $width > $content_width ) { |
| 246 | $width = $content_width; |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | // Set a width if none is found and $content_width is available |
| 251 | // If width is set in this manner and height is available, use `fit` instead of `resize` to prevent skewing |
| 252 | if ( false === $width && is_numeric( $content_width ) ) { |
| 253 | $width = (int) $content_width; |
| 254 | |
| 255 | if ( false !== $height ) |
| 256 | $transform = 'fit'; |
| 257 | } |
| 258 | |
| 259 | // Detect if image source is for a custom-cropped thumbnail and prevent further URL manipulation. |
| 260 | if ( ! $fullsize_url && preg_match_all( '#-e[a-z0-9]+(-\d+x\d+)?\.(' . implode('|', self::$extensions ) . '){1}$#i', basename( $src ), $filename ) ) |
| 261 | $fullsize_url = true; |
| 262 | |
| 263 | // Build URL, first maybe removing WP's resized string so we pass the original image to Photon |
| 264 | if ( ! $fullsize_url ) { |
| 265 | $src = self::strip_image_dimensions_maybe( $src ); |
| 266 | } |
| 267 | |
| 268 | // Build array of Photon args and expose to filter before passing to Photon URL function |
| 269 | $args = array(); |
| 270 | |
| 271 | if ( false !== $width && false !== $height && false === strpos( $width, '%' ) && false === strpos( $height, '%' ) ) |
| 272 | $args[ $transform ] = $width . ',' . $height; |
| 273 | elseif ( false !== $width ) |
| 274 | $args['w'] = $width; |
| 275 | elseif ( false !== $height ) |
| 276 | $args['h'] = $height; |
| 277 | |
| 278 | $args = apply_filters( 'jetpack_photon_post_image_args', $args, compact( 'tag', 'src', 'src_orig', 'width', 'height' ) ); |
| 279 | |
| 280 | $photon_url = jetpack_photon_url( $src, $args ); |
| 281 | |
| 282 | // Modify image tag if Photon function provides a URL |
| 283 | // Ensure changes are only applied to the current image by copying and modifying the matched tag, then replacing the entire tag with our modified version. |
| 284 | if ( $src != $photon_url ) { |
| 285 | $new_tag = $tag; |
| 286 | |
| 287 | // If present, replace the link href with a Photoned URL for the full-size image. |
| 288 | if ( ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) |
| 289 | $new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $new_tag, 1 ); |
| 290 | |
| 291 | // Supplant the original source value with our Photon URL |
| 292 | $photon_url = esc_url( $photon_url ); |
| 293 | $new_tag = str_replace( $src_orig, $photon_url, $new_tag ); |
| 294 | |
| 295 | // If Lazy Load is in use, pass placeholder image through Photon |
| 296 | if ( isset( $placeholder_src ) && self::validate_image_url( $placeholder_src ) ) { |
| 297 | $placeholder_src = jetpack_photon_url( $placeholder_src ); |
| 298 | |
| 299 | if ( $placeholder_src != $placeholder_src_orig ) |
| 300 | $new_tag = str_replace( $placeholder_src_orig, esc_url( $placeholder_src ), $new_tag ); |
| 301 | |
| 302 | unset( $placeholder_src ); |
| 303 | } |
| 304 | |
| 305 | // Remove the width and height arguments from the tag to prevent distortion |
| 306 | $new_tag = preg_replace( '#(?<=\s)(width|height)=["|\']?[\d%]+["|\']?\s?#i', '', $new_tag ); |
| 307 | |
| 308 | // Tag an image for dimension checking |
| 309 | $new_tag = preg_replace( '#(\s?/)?>(\s*</a>)?$#i', ' data-recalc-dims="1"\1>\2', $new_tag ); |
| 310 | |
| 311 | // Replace original tag with modified version |
| 312 | $content = str_replace( $tag, $new_tag, $content ); |
| 313 | } |
| 314 | } elseif ( preg_match( '#^http(s)?://i[\d]{1}.wp.com#', $src ) && ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) { |
| 315 | $new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $tag, 1 ); |
| 316 | |
| 317 | $content = str_replace( $tag, $new_tag, $content ); |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | return $content; |
| 323 | } |
| 324 | |
| 325 | public static function filter_the_galleries( $galleries ) { |
| 326 | if ( empty( $galleries ) || ! is_array( $galleries ) ) { |
| 327 | return $galleries; |
| 328 | } |
| 329 | |
| 330 | // Pass by reference, so we can modify them in place. |
| 331 | foreach ( $galleries as &$this_gallery ) { |
| 332 | if ( is_string( $this_gallery ) ) { |
| 333 | $this_gallery = self::filter_the_content( $this_gallery ); |
| 334 | // LEAVING COMMENTED OUT as for the moment it doesn't seem |
| 335 | // necessary and I'm not sure how it would propagate through. |
| 336 | // } elseif ( is_array( $this_gallery ) |
| 337 | // && ! empty( $this_gallery['src'] ) |
| 338 | // && ! empty( $this_gallery['type'] ) |
| 339 | // && in_array( $this_gallery['type'], array( 'rectangle', 'square', 'circle' ) ) ) { |
| 340 | // $this_gallery['src'] = array_map( 'jetpack_photon_url', $this_gallery['src'] ); |
| 341 | } |
| 342 | } |
| 343 | unset( $this_gallery ); // break the reference. |
| 344 | |
| 345 | return $galleries; |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | ** CORE IMAGE RETRIEVAL |
| 350 | **/ |
| 351 | |
| 352 | /** |
| 353 | * Filter post thumbnail image retrieval, passing images through Photon |
| 354 | * |
| 355 | * @param string|bool $image |
| 356 | * @param int $attachment_id |
| 357 | * @param string|array $size |
| 358 | * @uses is_admin, apply_filters, wp_get_attachment_url, self::validate_image_url, this::image_sizes, jetpack_photon_url |
| 359 | * @filter image_downsize |
| 360 | * @return string|bool |
| 361 | */ |
| 362 | public function filter_image_downsize( $image, $attachment_id, $size ) { |
| 363 | // Don't foul up the admin side of things, and provide plugins a way of preventing Photon from being applied to images. |
| 364 | if ( is_admin() || apply_filters( 'jetpack_photon_override_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) ) ) |
| 365 | return $image; |
| 366 | |
| 367 | // Get the image URL and proceed with Photon-ification if successful |
| 368 | $image_url = wp_get_attachment_url( $attachment_id ); |
| 369 | |
| 370 | if ( $image_url ) { |
| 371 | // Check if image URL should be used with Photon |
| 372 | if ( ! self::validate_image_url( $image_url ) ) |
| 373 | return $image; |
| 374 | |
| 375 | // If an image is requested with a size known to WordPress, use that size's settings with Photon |
| 376 | if ( ( is_string( $size ) || is_int( $size ) ) && array_key_exists( $size, self::image_sizes() ) ) { |
| 377 | $image_args = self::image_sizes(); |
| 378 | $image_args = $image_args[ $size ]; |
| 379 | |
| 380 | $photon_args = array(); |
| 381 | |
| 382 | // `full` is a special case in WP |
| 383 | // To ensure filter receives consistent data regardless of requested size, `$image_args` is overridden with dimensions of original image. |
| 384 | if ( 'full' == $size ) { |
| 385 | $image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 386 | if ( isset( $image_meta['width'], $image_meta['height'] ) ) { |
| 387 | // 'crop' is true so Photon's `resize` method is used |
| 388 | $image_args = array( |
| 389 | 'width' => $image_meta['width'], |
| 390 | 'height' => $image_meta['height'], |
| 391 | 'crop' => true |
| 392 | ); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | // Expose determined arguments to a filter before passing to Photon |
| 397 | $transform = $image_args['crop'] ? 'resize' : 'fit'; |
| 398 | |
| 399 | // Check specified image dimensions and account for possible zero values; photon fails to resize if a dimension is zero. |
| 400 | if ( 0 == $image_args['width'] || 0 == $image_args['height'] ) { |
| 401 | if ( 0 == $image_args['width'] && 0 < $image_args['height'] ) { |
| 402 | $photon_args['h'] = $image_args['height']; |
| 403 | } elseif ( 0 == $image_args['height'] && 0 < $image_args['width'] ) { |
| 404 | $photon_args['w'] = $image_args['width']; |
| 405 | } |
| 406 | } else { |
| 407 | if ( ( 'resize' === $transform ) && $image_meta = wp_get_attachment_metadata( $attachment_id ) ) { |
| 408 | // Lets make sure that we don't upscale images since wp never upscales them as well |
| 409 | $smaller_width = ( ( $image_meta['width'] < $image_args['width'] ) ? $image_meta['width'] : $image_args['width'] ); |
| 410 | $smaller_height = ( ( $image_meta['height'] < $image_args['height'] ) ? $image_meta['height'] : $image_args['height'] ); |
| 411 | |
| 412 | $photon_args[ $transform ] = $smaller_width . ',' . $smaller_height; |
| 413 | } else { |
| 414 | $photon_args[ $transform ] = $image_args['width'] . ',' . $image_args['height']; |
| 415 | } |
| 416 | |
| 417 | } |
| 418 | |
| 419 | $photon_args = apply_filters( 'jetpack_photon_image_downsize_string', $photon_args, compact( 'image_args', 'image_url', 'attachment_id', 'size', 'transform' ) ); |
| 420 | |
| 421 | // Generate Photon URL |
| 422 | $image = array( |
| 423 | jetpack_photon_url( $image_url, $photon_args ), |
| 424 | false, |
| 425 | false |
| 426 | ); |
| 427 | } elseif ( is_array( $size ) ) { |
| 428 | // Pull width and height values from the provided array, if possible |
| 429 | $width = isset( $size[0] ) ? (int) $size[0] : false; |
| 430 | $height = isset( $size[1] ) ? (int) $size[1] : false; |
| 431 | |
| 432 | // Don't bother if necessary parameters aren't passed. |
| 433 | if ( ! $width || ! $height ) |
| 434 | return $image; |
| 435 | |
| 436 | // Expose arguments to a filter before passing to Photon |
| 437 | $photon_args = array( |
| 438 | 'fit' => $width . ',' . $height |
| 439 | ); |
| 440 | |
| 441 | $photon_args = apply_filters( 'jetpack_photon_image_downsize_array', $photon_args, compact( 'width', 'height', 'image_url', 'attachment_id' ) ); |
| 442 | |
| 443 | // Generate Photon URL |
| 444 | $image = array( |
| 445 | jetpack_photon_url( $image_url, $photon_args ), |
| 446 | false, |
| 447 | false |
| 448 | ); |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | return $image; |
| 453 | } |
| 454 | |
| 455 | /** |
| 456 | ** GENERAL FUNCTIONS |
| 457 | **/ |
| 458 | |
| 459 | /** |
| 460 | * Ensure image URL is valid for Photon. |
| 461 | * Though Photon functions address some of the URL issues, we should avoid unnecessary processing if we know early on that the image isn't supported. |
| 462 | * |
| 463 | * @param string $url |
| 464 | * @uses wp_parse_args |
| 465 | * @return bool |
| 466 | */ |
| 467 | protected static function validate_image_url( $url ) { |
| 468 | $parsed_url = @parse_url( $url ); |
| 469 | |
| 470 | if ( ! $parsed_url ) |
| 471 | return false; |
| 472 | |
| 473 | // Parse URL and ensure needed keys exist, since the array returned by `parse_url` only includes the URL components it finds. |
| 474 | $url_info = wp_parse_args( $parsed_url, array( |
| 475 | 'scheme' => null, |
| 476 | 'host' => null, |
| 477 | 'port' => null, |
| 478 | 'path' => null |
| 479 | ) ); |
| 480 | |
| 481 | // Bail if scheme isn't http or port is set that isn't port 80 |
| 482 | if ( ( 'http' != $url_info['scheme'] || ! in_array( $url_info['port'], array( 80, null ) ) ) && apply_filters( 'jetpack_photon_reject_https', true ) ) |
| 483 | return false; |
| 484 | |
| 485 | // Bail if no host is found |
| 486 | if ( is_null( $url_info['host'] ) ) |
| 487 | return false; |
| 488 | |
| 489 | // Bail if the image alredy went through Photon |
| 490 | if ( preg_match( '#^i[\d]{1}.wp.com$#i', $url_info['host'] ) ) |
| 491 | return false; |
| 492 | |
| 493 | // Bail if no path is found |
| 494 | if ( is_null( $url_info['path'] ) ) |
| 495 | return false; |
| 496 | |
| 497 | // Ensure image extension is acceptable |
| 498 | if ( ! in_array( strtolower( pathinfo( $url_info['path'], PATHINFO_EXTENSION ) ), self::$extensions ) ) |
| 499 | return false; |
| 500 | |
| 501 | // If we got this far, we should have an acceptable image URL |
| 502 | // But let folks filter to decline if they prefer. |
| 503 | return apply_filters( 'photon_validate_image_url', true, $url, $parsed_url ); |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * Checks if the file exists before it passes the file to photon |
| 508 | * |
| 509 | * @param string $src The image URL |
| 510 | * @return string |
| 511 | **/ |
| 512 | protected static function strip_image_dimensions_maybe( $src ){ |
| 513 | $stripped_src = $src; |
| 514 | |
| 515 | // Build URL, first removing WP's resized string so we pass the original image to Photon |
| 516 | if ( preg_match( '#(-\d+x\d+)\.(' . implode('|', self::$extensions ) . '){1}$#i', $src, $src_parts ) ) { |
| 517 | $stripped_src = str_replace( $src_parts[1], '', $src ); |
| 518 | $upload_dir = wp_upload_dir(); |
| 519 | |
| 520 | // Extracts the file path to the image minus the base url |
| 521 | $file_path = substr( $stripped_src, strlen ( $upload_dir['baseurl'] ) ); |
| 522 | |
| 523 | if( file_exists( $upload_dir["basedir"] . $file_path ) ) |
| 524 | $src = $stripped_src; |
| 525 | } |
| 526 | |
| 527 | return $src; |
| 528 | } |
| 529 | |
| 530 | /** |
| 531 | * Provide an array of available image sizes and corresponding dimensions. |
| 532 | * Similar to get_intermediate_image_sizes() except that it includes image sizes' dimensions, not just their names. |
| 533 | * |
| 534 | * @global $wp_additional_image_sizes |
| 535 | * @uses get_option |
| 536 | * @return array |
| 537 | */ |
| 538 | protected static function image_sizes() { |
| 539 | if ( null == self::$image_sizes ) { |
| 540 | global $_wp_additional_image_sizes; |
| 541 | |
| 542 | // Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes |
| 543 | $images = array( |
| 544 | 'thumb' => array( |
| 545 | 'width' => intval( get_option( 'thumbnail_size_w' ) ), |
| 546 | 'height' => intval( get_option( 'thumbnail_size_h' ) ), |
| 547 | 'crop' => (bool) get_option( 'thumbnail_crop' ) |
| 548 | ), |
| 549 | 'medium' => array( |
| 550 | 'width' => intval( get_option( 'medium_size_w' ) ), |
| 551 | 'height' => intval( get_option( 'medium_size_h' ) ), |
| 552 | 'crop' => false |
| 553 | ), |
| 554 | 'large' => array( |
| 555 | 'width' => intval( get_option( 'large_size_w' ) ), |
| 556 | 'height' => intval( get_option( 'large_size_h' ) ), |
| 557 | 'crop' => false |
| 558 | ), |
| 559 | 'full' => array( |
| 560 | 'width' => null, |
| 561 | 'height' => null, |
| 562 | 'crop' => false |
| 563 | ) |
| 564 | ); |
| 565 | |
| 566 | // Compatibility mapping as found in wp-includes/media.php |
| 567 | $images['thumbnail'] = $images['thumb']; |
| 568 | |
| 569 | // Update class variable, merging in $_wp_additional_image_sizes if any are set |
| 570 | if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) ) |
| 571 | self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes ); |
| 572 | else |
| 573 | self::$image_sizes = $images; |
| 574 | } |
| 575 | |
| 576 | return is_array( self::$image_sizes ) ? self::$image_sizes : array(); |
| 577 | } |
| 578 | |
| 579 | /** |
| 580 | * Pass og:image URLs through Photon |
| 581 | * |
| 582 | * @param array $tags |
| 583 | * @param array $parameters |
| 584 | * @uses jetpack_photon_url |
| 585 | * @return array |
| 586 | */ |
| 587 | function filter_open_graph_tags( $tags, $parameters ) { |
| 588 | if ( empty( $tags['og:image'] ) ) { |
| 589 | return $tags; |
| 590 | } |
| 591 | |
| 592 | $photon_args = array( |
| 593 | 'fit' => sprintf( '%d,%d', 2 * $parameters['image_width'], 2 * $parameters['image_height'] ), |
| 594 | ); |
| 595 | |
| 596 | if ( is_array( $tags['og:image'] ) ) { |
| 597 | $images = array(); |
| 598 | foreach ( $tags['og:image'] as $image ) { |
| 599 | $images[] = jetpack_photon_url( $image, $photon_args ); |
| 600 | } |
| 601 | $tags['og:image'] = $images; |
| 602 | } else { |
| 603 | $tags['og:image'] = jetpack_photon_url( $tags['og:image'], $photon_args ); |
| 604 | } |
| 605 | |
| 606 | return $tags; |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * Enqueue Photon helper script |
| 611 | * |
| 612 | * @uses wp_enqueue_script, plugins_url |
| 613 | * @action wp_enqueue_script |
| 614 | * @return null |
| 615 | */ |
| 616 | public function action_wp_enqueue_scripts() { |
| 617 | wp_enqueue_script( 'jetpack-photon', plugins_url( 'modules/photon/photon.js', JETPACK__PLUGIN_FILE ), array( 'jquery' ), 20130122, true ); |
| 618 | } |
| 619 | } |
| 620 |