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<?php
/**
* Administration API: WP_Site_Icon class
*
* @package WordPress
* @subpackage Administration
* @since 4.3.0
*/
/**
* Core class used to implement site icon functionality.
*
* @since 4.3.0
*/
class WP_Site_Icon {
/**
* The minimum size of the site icon.
*
* @since 4.3.0
* @var int
*/
public $min_size = 512;
/**
* The size to which to crop the image so that we can display it in the UI nicely.
*
* @since 4.3.0
* @var int
*/
public $page_crop = 512;
/**
* List of site icon sizes.
*
* @since 4.3.0
* @var array
*/
public $site_icon_sizes = array(
/*
* Square, medium sized tiles for IE11+.
*
* See https://msdn.microsoft.com/library/dn455106(v=vs.85).aspx
*/
270,
/*
* App icon for Android/Chrome.
*
* @link https://developers.google.com/web/updates/2014/11/Support-for-theme-color-in-Chrome-39-for-Android
* @link https://developer.chrome.com/multidevice/android/installtohomescreen
*/
192,
/*
* App icons up to iPhone 6 Plus.
*
* See https://developer.apple.com/library/prerelease/ios/documentation/UserExperience/Conceptual/MobileHIG/IconMatrix.html
*/
180,
// Our regular Favicon.
32,
);
/**
* Registers actions and filters.
*
* @since 4.3.0
*/
public function __construct() {
add_action( 'delete_attachment', array( $this, 'delete_attachment_data' ) );
add_filter( 'get_post_metadata', array( $this, 'get_post_metadata' ), 10, 4 );
}
/**
* Creates an attachment 'object'.
*
* @since 4.3.0
*
* @param string $cropped Cropped image URL.
* @param int $parent_attachment_id Attachment ID of parent image.
* @return array Attachment object.
*/
public function create_attachment_object( $cropped, $parent_attachment_id ) {
$parent = get_post( $parent_attachment_id );
$parent_url = wp_get_attachment_url( $parent->ID );
$url = str_replace( basename( $parent_url ), basename( $cropped ), $parent_url );
$size = @getimagesize( $cropped );
$image_type = ( $size ) ? $size['mime'] : 'image/jpeg';
$object = array(
'ID' => $parent_attachment_id,
'post_title' => basename( $cropped ),
'post_content' => $url,
'post_mime_type' => $image_type,
'guid' => $url,
'context' => 'site-icon'
);
return $object;
}
/**
* Inserts an attachment.
*
* @since 4.3.0
*
* @param array $object Attachment object.
* @param string $file File path of the attached image.
* @return int Attachment ID
*/
public function insert_attachment( $object, $file ) {
$attachment_id = wp_insert_attachment( $object, $file );
$metadata = wp_generate_attachment_metadata( $attachment_id, $file );
/**
* Filters the site icon attachment metadata.
*
* @since 4.3.0
*
* @see wp_generate_attachment_metadata()
*
* @param array $metadata Attachment metadata.
*/
$metadata = apply_filters( 'site_icon_attachment_metadata', $metadata );
wp_update_attachment_metadata( $attachment_id, $metadata );
return $attachment_id;
}
/**
* Adds additional sizes to be made when creating the site_icon images.
*
* @since 4.3.0
*
* @param array $sizes List of additional sizes.
* @return array Additional image sizes.
*/
public function additional_sizes( $sizes = array() ) {
$only_crop_sizes = array();
/**
* Filters the different dimensions that a site icon is saved in.
*
* @since 4.3.0
*
* @param array $site_icon_sizes Sizes available for the Site Icon.
*/
$this->site_icon_sizes = apply_filters( 'site_icon_image_sizes', $this->site_icon_sizes );
// Use a natural sort of numbers.
natsort( $this->site_icon_sizes );
$this->site_icon_sizes = array_reverse( $this->site_icon_sizes );
// ensure that we only resize the image into
foreach ( $sizes as $name => $size_array ) {
if ( isset( $size_array['crop'] ) ) {
$only_crop_sizes[ $name ] = $size_array;
}
}
foreach ( $this->site_icon_sizes as $size ) {
if ( $size < $this->min_size ) {
$only_crop_sizes[ 'site_icon-' . $size ] = array(
'width ' => $size,
'height' => $size,
'crop' => true,
);
}
}
return $only_crop_sizes;
}
/**
* Adds Site Icon sizes to the array of image sizes on demand.
*
* @since 4.3.0
*
* @param array $sizes List of image sizes.
* @return array List of intermediate image sizes.
*/
public function intermediate_image_sizes( $sizes = array() ) {
/** This filter is documented in wp-admin/includes/class-wp-site-icon.php */
$this->site_icon_sizes = apply_filters( 'site_icon_image_sizes', $this->site_icon_sizes );
foreach ( $this->site_icon_sizes as $size ) {
$sizes[] = 'site_icon-' . $size;
}
return $sizes;
}
/**
* Deletes the Site Icon when the image file is deleted.
*
* @since 4.3.0
*
* @param int $post_id Attachment ID.
*/
public function delete_attachment_data( $post_id ) {
$site_icon_id = get_option( 'site_icon' );
if ( $site_icon_id && $post_id == $site_icon_id ) {
delete_option( 'site_icon' );
}
}
/**
* Adds custom image sizes when meta data for an image is requested, that happens to be used as Site Icon.
*
* @since 4.3.0
*
* @param null|array|string $value The value get_metadata() should return a single metadata value, or an
* array of values.
* @param int $post_id Post ID.
* @param string $meta_key Meta key.
* @param string|array $single Meta value, or an array of values.
* @return array|null|string The attachment metadata value, array of values, or null.
*/
public function get_post_metadata( $value, $post_id, $meta_key, $single ) {
if ( $single && '_wp_attachment_backup_sizes' === $meta_key ) {
$site_icon_id = get_option( 'site_icon' );
if ( $post_id == $site_icon_id ) {
add_filter( 'intermediate_image_sizes', array( $this, 'intermediate_image_sizes' ) );
}
}
return $value;
}
}