| 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', |
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'jpg', |
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'jpeg', |
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'png' |
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); |
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|
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// Don't access this directly. Instead, use self::image_sizes() so it's actually populated with something. |
| 19 |
protected static $image_sizes = null; |
| 20 |
|
| 21 |
/** |
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* Singleton implementation |
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* |
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* @return object |
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*/ |
| 26 |
public static function instance() { |
| 27 |
if ( ! is_a( self::$__instance, 'Jetpack_Photon' ) ) { |
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self::$__instance = new Jetpack_Photon; |
| 29 |
self::$__instance->setup(); |
| 30 |
} |
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|
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return self::$__instance; |
| 33 |
} |
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|
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/** |
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* 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 |
* |
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* @uses add_action, add_filter |
| 45 |
* @return null |
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*/ |
| 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 |
|
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// Images in post content and galleries |
| 55 |
add_filter( 'the_content', array( __CLASS__, 'filter_the_content' ), 999999 ); |
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add_filter( 'get_post_gallery', array( __CLASS__, 'filter_the_content' ), 999999 ); |
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|
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// Core image retrieval |
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add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), 10, 3 ); |
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|
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// Helpers for maniuplated images |
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add_action( 'wp_enqueue_scripts', array( $this, 'action_wp_enqueue_scripts' ), 9 ); |
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} |
| 64 |
|
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/** |
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* Check if site is private and warn user if it is |
| 67 |
* |
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* @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 |
|
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/** |
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** IN-CONTENT IMAGE MANIPULATION FUNCTIONS |
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**/ |
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|
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/** |
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* Match all images and any relevant <a> tags in a block of HTML. |
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* |
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* @param string $content Some HTML. |
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* @return array An array of $images matches, where $images[0] is |
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* an array of full matches, and the link_url, img_tag, |
| 86 |
* and img_url keys are arrays of those matches. |
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*/ |
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public static function parse_images_from_html( $content ) { |
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$images = array(); |
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|
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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 ) { |
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// Simplify the output as much as possible, mostly for confirming test results. |
| 94 |
if ( is_numeric( $key ) && $key > 0 ) |
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unset( $images[$key] ); |
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} |
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|
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return $images; |
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} |
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|
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return array(); |
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} |
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|
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/** |
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* Try to determine height and width from strings WP appends to resized image filenames. |
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* |
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* @param string $src The image URL. |
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* @return array An array consisting of width and height. |
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*/ |
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public static function parse_dimensions_from_filename( $src ) { |
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$width_height_string = array(); |
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|
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if ( preg_match( '#-(\d+)x(\d+)\.(?:' . implode('|', self::$extensions ) . '){1}$#i', $src, $width_height_string ) ) { |
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$width = (int) $width_height_string[1]; |
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$height = (int) $width_height_string[2]; |
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|
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if ( $width && $height ) |
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return array( $width, $height ); |
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} |
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|
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return array( false, false ); |
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} |
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|
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/** |
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* Identify images in post content, and if images are local (uploaded to the current site), pass through Photon. |
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* |
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* @param string $content |
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* @uses self::validate_image_url, apply_filters, jetpack_photon_url, esc_url |
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* @filter the_content |
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* @return string |
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*/ |
| 132 |
public static function filter_the_content( $content ) { |
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$images = Jetpack_Photon::parse_images_from_html( $content ); |
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|
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if ( ! empty( $images ) ) { |
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$content_width = Jetpack::get_content_width(); |
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|
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$image_sizes = self::image_sizes(); |
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$upload_dir = wp_upload_dir(); |
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|
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foreach ( $images[0] as $index => $tag ) { |
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// Default to resize, though fit may be used in certain cases where a dimension cannot be ascertained |
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$transform = 'resize'; |
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|
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// Start with a clean attachment ID each time |
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$attachment_id = false; |
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|
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// Flag if we need to munge a fullsize URL |
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$fullsize_url = false; |
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|
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// Identify image source |
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$src = $src_orig = $images['img_url'][ $index ]; |
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|
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// Allow specific images to be skipped |
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if ( apply_filters( 'jetpack_photon_skip_image', false, $src, $tag ) ) |
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continue; |
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|
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// Support Automattic's Lazy Load plugin |
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// Can't modify $tag yet as we need unadulterated version later |
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if ( preg_match( '#data-lazy-src=["|\'](.+?)["|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) { |
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$placeholder_src = $placeholder_src_orig = $src; |
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$src = $src_orig = $lazy_load_src[1]; |
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} |
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|
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// Check if image URL should be used with Photon |
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if ( self::validate_image_url( $src ) ) { |
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// Find the width and height attributes |
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$width = $height = false; |
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|
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// First, check the image tag |
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if ( preg_match( '#width=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $width_string ) ) |
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$width = $width_string[1]; |
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|
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if ( preg_match( '#height=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $height_string ) ) |
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$height = $height_string[1]; |
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|
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// Can't pass both a relative width and height, so unset the height in favor of not breaking the horizontal layout. |
| 178 |
if ( false !== strpos( $width, '%' ) && false !== strpos( $height, '%' ) ) |
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$width = $height = false; |
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|
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// Detect WP registered image size from HTML class |
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if ( preg_match( '#class=["|\']?[^"\']*size-([^"\'\s]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $size ) ) { |
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$size = array_pop( $size ); |
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|
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if ( false === $width && false === $height && 'full' != $size && array_key_exists( $size, $image_sizes ) ) { |
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$width = (int) $image_sizes[ $size ]['width']; |
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$height = (int) $image_sizes[ $size ]['height']; |
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$transform = $image_sizes[ $size ]['crop'] ? 'resize' : 'fit'; |
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} |
| 190 |
} else { |
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unset( $size ); |
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} |
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|
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// WP Attachment ID, if uploaded to this site |
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if ( preg_match( '#class=["|\']?[^"\']*wp-image-([\d]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $attachment_id ) && ( 0 === strpos( $src, $upload_dir['baseurl'] ) || apply_filters( 'jetpack_photon_image_is_local', false, compact( 'src', 'tag', 'images', 'index' ) ) ) ) { |
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$attachment_id = intval( array_pop( $attachment_id ) ); |
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|
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if ( $attachment_id ) { |
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$attachment = get_post( $attachment_id ); |
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|
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// Basic check on returned post object |
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if ( is_object( $attachment ) && ! is_wp_error( $attachment ) && 'attachment' == $attachment->post_type ) { |
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$src_per_wp = wp_get_attachment_image_src( $attachment_id, isset( $size ) ? $size : 'full' ); |
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|
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if ( self::validate_image_url( $src_per_wp[0] ) ) { |
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$src = $src_per_wp[0]; |
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$fullsize_url = true; |
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|
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// Prevent image distortion if a detected dimension exceeds the image's natural dimensions |
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if ( ( false !== $width && $width > $src_per_wp[1] ) || ( false !== $height && $height > $src_per_wp[2] ) ) { |
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$width = false == $width ? false : min( $width, $src_per_wp[1] ); |
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$height = false == $height ? false : min( $height, $src_per_wp[2] ); |
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} |
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|
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// If no width and height are found, max out at source image's natural dimensions |
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// Otherwise, respect registered image sizes' cropping setting |
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if ( false == $width && false == $height ) { |
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$width = $src_per_wp[1]; |
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$height = $src_per_wp[2]; |
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$transform = 'fit'; |
| 221 |
} elseif ( isset( $size ) && array_key_exists( $size, $image_sizes ) && isset( $image_sizes[ $size ]['crop'] ) ) { |
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$transform = (bool) $image_sizes[ $size ]['crop'] ? 'resize' : 'fit'; |
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} |
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} |
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} else { |
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unset( $attachment_id ); |
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unset( $attachment ); |
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} |
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} |
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} |
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|
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// If image tag lacks width and height arguments, try to determine from strings WP appends to resized image filenames. |
| 233 |
if ( false === $width && false === $height ) { |
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list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $src ); |
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} |
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|
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// If width is available, constrain to $content_width |
| 238 |
if ( false !== $width && false === strpos( $width, '%' ) && is_numeric( $content_width ) ) { |
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if ( $width > $content_width && false !== $height && false === strpos( $height, '%' ) ) { |
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$height = round( ( $content_width * $height ) / $width ); |
| 241 |
$width = $content_width; |
| 242 |
} elseif ( $width > $content_width ) { |
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$width = $content_width; |
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} |
| 245 |
} |
| 246 |
|
| 247 |
// Set a width if none is found and $content_width is available |
| 248 |
// If width is set in this manner and height is available, use `fit` instead of `resize` to prevent skewing |
| 249 |
if ( false === $width && is_numeric( $content_width ) ) { |
| 250 |
$width = (int) $content_width; |
| 251 |
|
| 252 |
if ( false !== $height ) |
| 253 |
$transform = 'fit'; |
| 254 |
} |
| 255 |
|
| 256 |
// Detect if image source is for a custom-cropped thumbnail and prevent further URL manipulation. |
| 257 |
if ( ! $fullsize_url && preg_match_all( '#-e[a-z0-9]+(-\d+x\d+)?\.(' . implode('|', self::$extensions ) . '){1}$#i', basename( $src ), $filename ) ) |
| 258 |
$fullsize_url = true; |
| 259 |
|
| 260 |
// Build URL, first maybe removing WP's resized string so we pass the original image to Photon |
| 261 |
if ( ! $fullsize_url ) { |
| 262 |
$src = self::strip_image_dimensions_maybe( $src ); |
| 263 |
} |
| 264 |
|
| 265 |
// Build array of Photon args and expose to filter before passing to Photon URL function |
| 266 |
$args = array(); |
| 267 |
|
| 268 |
if ( false !== $width && false !== $height && false === strpos( $width, '%' ) && false === strpos( $height, '%' ) ) |
| 269 |
$args[ $transform ] = $width . ',' . $height; |
| 270 |
elseif ( false !== $width ) |
| 271 |
$args['w'] = $width; |
| 272 |
elseif ( false !== $height ) |
| 273 |
$args['h'] = $height; |
| 274 |
|
| 275 |
$args = apply_filters( 'jetpack_photon_post_image_args', $args, compact( 'tag', 'src', 'src_orig', 'width', 'height' ) ); |
| 276 |
|
| 277 |
$photon_url = jetpack_photon_url( $src, $args ); |
| 278 |
|
| 279 |
// Modify image tag if Photon function provides a URL |
| 280 |
// 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. |
| 281 |
if ( $src != $photon_url ) { |
| 282 |
$new_tag = $tag; |
| 283 |
|
| 284 |
// If present, replace the link href with a Photoned URL for the full-size image. |
| 285 |
if ( ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) |
| 286 |
$new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $new_tag, 1 ); |
| 287 |
|
| 288 |
// Supplant the original source value with our Photon URL |
| 289 |
$photon_url = esc_url( $photon_url ); |
| 290 |
$new_tag = str_replace( $src_orig, $photon_url, $new_tag ); |
| 291 |
|
| 292 |
// If Lazy Load is in use, pass placeholder image through Photon |
| 293 |
if ( isset( $placeholder_src ) && self::validate_image_url( $placeholder_src ) ) { |
| 294 |
$placeholder_src = jetpack_photon_url( $placeholder_src ); |
| 295 |
|
| 296 |
if ( $placeholder_src != $placeholder_src_orig ) |
| 297 |
$new_tag = str_replace( $placeholder_src_orig, esc_url( $placeholder_src ), $new_tag ); |
| 298 |
|
| 299 |
unset( $placeholder_src ); |
| 300 |
} |
| 301 |
|
| 302 |
// Remove the width and height arguments from the tag to prevent distortion |
| 303 |
$new_tag = preg_replace( '#(?<=\s)(width|height)=["|\']?[\d%]+["|\']?\s?#i', '', $new_tag ); |
| 304 |
|
| 305 |
// Tag an image for dimension checking |
| 306 |
$new_tag = preg_replace( '#(\s?/)?>(</a>)?$#i', ' data-recalc-dims="1"\1>\2', $new_tag ); |
| 307 |
|
| 308 |
// Replace original tag with modified version |
| 309 |
$content = str_replace( $tag, $new_tag, $content ); |
| 310 |
} |
| 311 |
} elseif ( preg_match( '#^http(s)?://i[\d]{1}.wp.com#', $src ) && ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) { |
| 312 |
$new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $tag, 1 ); |
| 313 |
|
| 314 |
$content = str_replace( $tag, $new_tag, $content ); |
| 315 |
} |
| 316 |
} |
| 317 |
} |
| 318 |
|
| 319 |
return $content; |
| 320 |
} |
| 321 |
|
| 322 |
/** |
| 323 |
** CORE IMAGE RETRIEVAL |
| 324 |
**/ |
| 325 |
|
| 326 |
/** |
| 327 |
* Filter post thumbnail image retrieval, passing images through Photon |
| 328 |
* |
| 329 |
* @param string|bool $image |
| 330 |
* @param int $attachment_id |
| 331 |
* @param string|array $size |
| 332 |
* @uses is_admin, apply_filters, wp_get_attachment_url, self::validate_image_url, this::image_sizes, jetpack_photon_url |
| 333 |
* @filter image_downsize |
| 334 |
* @return string|bool |
| 335 |
*/ |
| 336 |
public function filter_image_downsize( $image, $attachment_id, $size ) { |
| 337 |
// Don't foul up the admin side of things, and provide plugins a way of preventing Photon from being applied to images. |
| 338 |
if ( is_admin() || apply_filters( 'jetpack_photon_override_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) ) ) |
| 339 |
return $image; |
| 340 |
|
| 341 |
// Get the image URL and proceed with Photon-ification if successful |
| 342 |
$image_url = wp_get_attachment_url( $attachment_id ); |
| 343 |
|
| 344 |
if ( $image_url ) { |
| 345 |
// Check if image URL should be used with Photon |
| 346 |
if ( ! self::validate_image_url( $image_url ) ) |
| 347 |
return $image; |
| 348 |
|
| 349 |
// If an image is requested with a size known to WordPress, use that size's settings with Photon |
| 350 |
if ( ( is_string( $size ) || is_int( $size ) ) && array_key_exists( $size, self::image_sizes() ) ) { |
| 351 |
$image_args = self::image_sizes(); |
| 352 |
$image_args = $image_args[ $size ]; |
| 353 |
|
| 354 |
$photon_args = array(); |
| 355 |
|
| 356 |
// `full` is a special case in WP |
| 357 |
// To ensure filter receives consistent data regardless of requested size, `$image_args` is overridden with dimensions of original image. |
| 358 |
if ( 'full' == $size ) { |
| 359 |
$image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 360 |
if ( isset( $image_meta['width'], $image_meta['height'] ) ) { |
| 361 |
// 'crop' is true so Photon's `resize` method is used |
| 362 |
$image_args = array( |
| 363 |
'width' => $image_meta['width'], |
| 364 |
'height' => $image_meta['height'], |
| 365 |
'crop' => true |
| 366 |
); |
| 367 |
} |
| 368 |
} |
| 369 |
|
| 370 |
// Expose determined arguments to a filter before passing to Photon |
| 371 |
$transform = $image_args['crop'] ? 'resize' : 'fit'; |
| 372 |
|
| 373 |
// Check specified image dimensions and account for possible zero values; photon fails to resize if a dimension is zero. |
| 374 |
if ( 0 == $image_args['width'] || 0 == $image_args['height'] ) { |
| 375 |
if ( 0 == $image_args['width'] && 0 < $image_args['height'] ) |
| 376 |
$photon_args['h'] = $image_args['height']; |
| 377 |
elseif ( 0 == $image_args['height'] && 0 < $image_args['width'] ) |
| 378 |
$photon_args['w'] = $image_args['width']; |
| 379 |
} else { |
| 380 |
if( 'resize' == $transform ) { |
| 381 |
// Lets make sure that we don't upscale images since wp never upscales them as well |
| 382 |
$image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 383 |
|
| 384 |
$smaller_width = ( ( $image_meta['width'] < $image_args['width'] ) ? $image_meta['width'] : $image_args['width'] ); |
| 385 |
$smaller_height = ( ( $image_meta['height'] < $image_args['height'] ) ? $image_meta['height'] : $image_args['height'] ); |
| 386 |
|
| 387 |
$photon_args[ $transform ] = $smaller_width . ',' . $smaller_height; |
| 388 |
} else { |
| 389 |
$photon_args[ $transform ] = $image_args['width'] . ',' . $image_args['height']; |
| 390 |
} |
| 391 |
|
| 392 |
} |
| 393 |
|
| 394 |
$photon_args = apply_filters( 'jetpack_photon_image_downsize_string', $photon_args, compact( 'image_args', 'image_url', 'attachment_id', 'size', 'transform' ) ); |
| 395 |
|
| 396 |
// Generate Photon URL |
| 397 |
$image = array( |
| 398 |
jetpack_photon_url( $image_url, $photon_args ), |
| 399 |
false, |
| 400 |
false |
| 401 |
); |
| 402 |
} elseif ( is_array( $size ) ) { |
| 403 |
// Pull width and height values from the provided array, if possible |
| 404 |
$width = isset( $size[0] ) ? (int) $size[0] : false; |
| 405 |
$height = isset( $size[1] ) ? (int) $size[1] : false; |
| 406 |
|
| 407 |
// Don't bother if necessary parameters aren't passed. |
| 408 |
if ( ! $width || ! $height ) |
| 409 |
return $image; |
| 410 |
|
| 411 |
// Expose arguments to a filter before passing to Photon |
| 412 |
$photon_args = array( |
| 413 |
'fit' => $width . ',' . $height |
| 414 |
); |
| 415 |
|
| 416 |
$photon_args = apply_filters( 'jetpack_photon_image_downsize_array', $photon_args, compact( 'width', 'height', 'image_url', 'attachment_id' ) ); |
| 417 |
|
| 418 |
// Generate Photon URL |
| 419 |
$image = array( |
| 420 |
jetpack_photon_url( $image_url, $photon_args ), |
| 421 |
false, |
| 422 |
false |
| 423 |
); |
| 424 |
} |
| 425 |
} |
| 426 |
|
| 427 |
return $image; |
| 428 |
} |
| 429 |
|
| 430 |
/** |
| 431 |
** GENERAL FUNCTIONS |
| 432 |
**/ |
| 433 |
|
| 434 |
/** |
| 435 |
* Ensure image URL is valid for Photon. |
| 436 |
* 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. |
| 437 |
* |
| 438 |
* @param string $url |
| 439 |
* @uses wp_parse_args |
| 440 |
* @return bool |
| 441 |
*/ |
| 442 |
protected static function validate_image_url( $url ) { |
| 443 |
$parsed_url = @parse_url( $url ); |
| 444 |
|
| 445 |
if ( ! $parsed_url ) |
| 446 |
return false; |
| 447 |
|
| 448 |
// Parse URL and ensure needed keys exist, since the array returned by `parse_url` only includes the URL components it finds. |
| 449 |
$url_info = wp_parse_args( $parsed_url, array( |
| 450 |
'scheme' => null, |
| 451 |
'host' => null, |
| 452 |
'port' => null, |
| 453 |
'path' => null |
| 454 |
) ); |
| 455 |
|
| 456 |
// Bail if scheme isn't http or port is set that isn't port 80 |
| 457 |
if ( ( 'http' != $url_info['scheme'] || ! in_array( $url_info['port'], array( 80, null ) ) ) && apply_filters( 'jetpack_photon_reject_https', true ) ) |
| 458 |
return false; |
| 459 |
|
| 460 |
// Bail if no host is found |
| 461 |
if ( is_null( $url_info['host'] ) ) |
| 462 |
return false; |
| 463 |
|
| 464 |
// Bail if the image alredy went through Photon |
| 465 |
if ( preg_match( '#^i[\d]{1}.wp.com$#i', $url_info['host'] ) ) |
| 466 |
return false; |
| 467 |
|
| 468 |
// Bail if no path is found |
| 469 |
if ( is_null( $url_info['path'] ) ) |
| 470 |
return false; |
| 471 |
|
| 472 |
// Ensure image extension is acceptable |
| 473 |
if ( ! in_array( strtolower( pathinfo( $url_info['path'], PATHINFO_EXTENSION ) ), self::$extensions ) ) |
| 474 |
return false; |
| 475 |
|
| 476 |
// If we got this far, we should have an acceptable image URL |
| 477 |
// But let folks filter to decline if they prefer. |
| 478 |
return apply_filters( 'photon_validate_image_url', true, $url, $parsed_url ); |
| 479 |
} |
| 480 |
|
| 481 |
/** |
| 482 |
* Checks if the file exists before it passes the file to photon |
| 483 |
* |
| 484 |
* @param string $src The image URL |
| 485 |
* @return string |
| 486 |
**/ |
| 487 |
protected static function strip_image_dimensions_maybe( $src ){ |
| 488 |
$stripped_src = $src; |
| 489 |
|
| 490 |
// Build URL, first removing WP's resized string so we pass the original image to Photon |
| 491 |
if ( preg_match( '#(-\d+x\d+)\.(' . implode('|', self::$extensions ) . '){1}$#i', $src, $src_parts ) ) { |
| 492 |
$stripped_src = str_replace( $src_parts[1], '', $src ); |
| 493 |
$upload_dir = wp_upload_dir(); |
| 494 |
|
| 495 |
// Extracts the file path to the image minus the base url |
| 496 |
$file_path = substr( $stripped_src, strlen ( $upload_dir['baseurl'] ) ); |
| 497 |
|
| 498 |
if( file_exists( $upload_dir["basedir"] . $file_path ) ) |
| 499 |
$src = $stripped_src; |
| 500 |
} |
| 501 |
|
| 502 |
return $src; |
| 503 |
} |
| 504 |
|
| 505 |
/** |
| 506 |
* Provide an array of available image sizes and corresponding dimensions. |
| 507 |
* Similar to get_intermediate_image_sizes() except that it includes image sizes' dimensions, not just their names. |
| 508 |
* |
| 509 |
* @global $wp_additional_image_sizes |
| 510 |
* @uses get_option |
| 511 |
* @return array |
| 512 |
*/ |
| 513 |
protected static function image_sizes() { |
| 514 |
if ( null == self::$image_sizes ) { |
| 515 |
global $_wp_additional_image_sizes; |
| 516 |
|
| 517 |
// Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes |
| 518 |
$images = array( |
| 519 |
'thumb' => array( |
| 520 |
'width' => intval( get_option( 'thumbnail_size_w' ) ), |
| 521 |
'height' => intval( get_option( 'thumbnail_size_h' ) ), |
| 522 |
'crop' => (bool) get_option( 'thumbnail_crop' ) |
| 523 |
), |
| 524 |
'medium' => array( |
| 525 |
'width' => intval( get_option( 'medium_size_w' ) ), |
| 526 |
'height' => intval( get_option( 'medium_size_h' ) ), |
| 527 |
'crop' => false |
| 528 |
), |
| 529 |
'large' => array( |
| 530 |
'width' => intval( get_option( 'large_size_w' ) ), |
| 531 |
'height' => intval( get_option( 'large_size_h' ) ), |
| 532 |
'crop' => false |
| 533 |
), |
| 534 |
'full' => array( |
| 535 |
'width' => null, |
| 536 |
'height' => null, |
| 537 |
'crop' => false |
| 538 |
) |
| 539 |
); |
| 540 |
|
| 541 |
// Compatibility mapping as found in wp-includes/media.php |
| 542 |
$images['thumbnail'] = $images['thumb']; |
| 543 |
|
| 544 |
// Update class variable, merging in $_wp_additional_image_sizes if any are set |
| 545 |
if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) ) |
| 546 |
self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes ); |
| 547 |
else |
| 548 |
self::$image_sizes = $images; |
| 549 |
} |
| 550 |
|
| 551 |
return is_array( self::$image_sizes ) ? self::$image_sizes : array(); |
| 552 |
} |
| 553 |
|
| 554 |
/** |
| 555 |
* Pass og:image URLs through Photon |
| 556 |
* |
| 557 |
* @param array $tags |
| 558 |
* @param array $parameters |
| 559 |
* @uses jetpack_photon_url |
| 560 |
* @return array |
| 561 |
*/ |
| 562 |
function filter_open_graph_tags( $tags, $parameters ) { |
| 563 |
if ( empty( $tags['og:image'] ) ) { |
| 564 |
return $tags; |
| 565 |
} |
| 566 |
|
| 567 |
$photon_args = array( |
| 568 |
'fit' => sprintf( '%d,%d', 2 * $parameters['image_width'], 2 * $parameters['image_height'] ), |
| 569 |
); |
| 570 |
|
| 571 |
if ( is_array( $tags['og:image'] ) ) { |
| 572 |
$images = array(); |
| 573 |
foreach ( $tags['og:image'] as $image ) { |
| 574 |
$images[] = jetpack_photon_url( $image, $photon_args ); |
| 575 |
} |
| 576 |
$tags['og:image'] = $images; |
| 577 |
} else { |
| 578 |
$tags['og:image'] = jetpack_photon_url( $tags['og:image'], $photon_args ); |
| 579 |
} |
| 580 |
|
| 581 |
return $tags; |
| 582 |
} |
| 583 |
|
| 584 |
/** |
| 585 |
* Enqueue Photon helper script |
| 586 |
* |
| 587 |
* @uses wp_enqueue_script, plugins_url |
| 588 |
* @action wp_enqueue_script |
| 589 |
* @return null |
| 590 |
*/ |
| 591 |
public function action_wp_enqueue_scripts() { |
| 592 |
wp_enqueue_script( 'jetpack-photon', plugins_url( 'modules/photon/photon.js', __FILE__ ), array( 'jquery' ), 20130122, true ); |
| 593 |
} |
| 594 |
} |
| 595 |
|
