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<?php
/**
* The Image Sizes library.
*
* @package jetpack
*/
jetpack_require_lib( 'class.jetpack-photon-image' );
/**
* Class Jetpack_Photon_ImageSizes
*
* Manages image resizing via Jetpack CDN Service.
*/
class Jetpack_Photon_ImageSizes {
/**
* @var array $data Attachment metadata.
*/
public $data;
/**
* @var Image Image to be resized.
*/
public $image;
/**
* @var null|array $sizes Intermediate sizes.
*/
public static $sizes = null;
/**
* Construct new sizes meta
*
* @param int $attachment_id Attachment ID.
* @param array $data Attachment metadata.
*/
public function __construct( $attachment_id, $data ) {
$this->data = $data;
$this->image = new Jetpack_Photon_Image( $data, get_post_mime_type( $attachment_id ) );
$this->generate_sizes();
}
/**
* Generate sizes for attachment.
*
* @return array Array of sizes; empty array as failure fallback.
*/
protected function generate_sizes() {
// There is no need to generate the sizes a new for every single image.
if ( null !== self::$sizes ) {
return self::$sizes;
}
/*
* The following logic is copied over from wp_generate_attachment_metadata
*/
$_wp_additional_image_sizes = wp_get_additional_image_sizes();
$sizes = array();
$intermediate_image_sizes = get_intermediate_image_sizes();
foreach ( $intermediate_image_sizes as $s ) {
$sizes[ $s ] = array(
'width' => '',
'height' => '',
'crop' => false,
);
if ( isset( $_wp_additional_image_sizes[ $s ]['width'] ) ) {
// For theme-added sizes.
$sizes[ $s ]['width'] = intval( $_wp_additional_image_sizes[ $s ]['width'] );
} else {
// For default sizes set in options.
$sizes[ $s ]['width'] = get_option( "{$s}_size_w" );
}
if ( isset( $_wp_additional_image_sizes[ $s ]['height'] ) ) {
// For theme-added sizes.
$sizes[ $s ]['height'] = intval( $_wp_additional_image_sizes[ $s ]['height'] );
} else {
// For default sizes set in options.
$sizes[ $s ]['height'] = get_option( "{$s}_size_h" );
}
if ( isset( $_wp_additional_image_sizes[ $s ]['crop'] ) ) {
// For theme-added sizes.
$sizes[ $s ]['crop'] = $_wp_additional_image_sizes[ $s ]['crop'];
} else {
// For default sizes set in options.
$sizes[ $s ]['crop'] = get_option( "{$s}_crop" );
}
}
self::$sizes = $sizes;
return $sizes;
}
/**
* @return array
*/
public function filtered_sizes() {
// Remove filter preventing the creation of advanced sizes.
remove_filter(
'intermediate_image_sizes_advanced',
array( 'Jetpack_Photon', 'filter_photon_noresize_intermediate_sizes' )
);
/** This filter is documented in wp-admin/includes/image.php */
$sizes = apply_filters( 'intermediate_image_sizes_advanced', self::$sizes, $this->data );
// Re-add the filter removed above.
add_filter(
'intermediate_image_sizes_advanced',
array( 'Jetpack_Photon', 'filter_photon_noresize_intermediate_sizes' )
);
return (array) $sizes;
}
/**
* Standardises and validates the size_data array.
*
* @param array $size_data Size data array - at least containing height or width key. Can contain crop as well.
*
* @return array Array with populated width, height and crop keys; empty array if no width and height are provided.
*/
public function standardize_size_data( $size_data ) {
$has_at_least_width_or_height = ( isset( $size_data['width'] ) || isset( $size_data['height'] ) );
if ( ! $has_at_least_width_or_height ) {
return array();
}
$defaults = array(
'width' => null,
'height' => null,
'crop' => false,
);
return array_merge( $defaults, $size_data );
}
/**
* Get sizes for attachment post meta.
*
* @return array ImageSizes for attachment postmeta.
*/
public function generate_sizes_meta() {
$metadata = array();
foreach ( $this->filtered_sizes() as $size => $size_data ) {
$size_data = $this->standardize_size_data( $size_data );
if ( true === empty( $size_data ) ) {
continue;
}
$resized_image = $this->resize( $size_data );
if ( true === is_array( $resized_image ) ) {
$metadata[ $size ] = $resized_image;
}
}
return $metadata;
}
/**
* @param array $size_data
*
* @return array|\WP_Error Array for usage in $metadata['sizes']; WP_Error on failure.
*/
protected function resize( $size_data ) {
return $this->image->get_size( $size_data );
}
}
|
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