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<?php

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/**

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* Administration API: WP_Site_Icon class

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* @package WordPress

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* @subpackage Administration

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* @since 4.3.0

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/**

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* Core class used to implement site icon functionality.

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* @since 4.3.0

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#[AllowDynamicProperties]

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class WP_Site_Icon {

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/**

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* The minimum size of the site icon.

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* @since 4.3.0

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* @var int

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public $min_size = 512;

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/**

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* The size to which to crop the image so that we can display it in the UI nicely.

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* @since 4.3.0

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* @var int

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public $page_crop = 512;

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/**

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* List of site icon sizes.

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* @since 4.3.0

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* @var int[]

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public $site_icon_sizes = array(

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* Square, medium sized tiles for IE11+.

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* See https://msdn.microsoft.com/library/dn455106(v=vs.85).aspx

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270,

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* App icon for Android/Chrome.

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* @link https://developers.google.com/web/updates/2014/11/Support-for-theme-color-in-Chrome-39-for-Android

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* @link https://developer.chrome.com/multidevice/android/installtohomescreen

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192,

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* App icons up to iPhone 6 Plus.

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* See https://developer.apple.com/library/prerelease/ios/documentation/UserExperience/Conceptual/MobileHIG/IconMatrix.html

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180,

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// Our regular Favicon.

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32,

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);

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/**

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* Registers actions and filters.

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* @since 4.3.0

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public function __construct() {

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add_action( 'delete_attachment', array( $this, 'delete_attachment_data' ) );

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add_filter( 'get_post_metadata', array( $this, 'get_post_metadata' ), 10, 4 );

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}

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/**

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* Creates an attachment 'object'.

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* @since 4.3.0

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* @deprecated 6.5.0

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* @param string $cropped Cropped image URL.

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* @param int $parent_attachment_id Attachment ID of parent image.

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* @return array An array with attachment object data.

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public function create_attachment_object( $cropped, $parent_attachment_id ) {

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_deprecated_function( __METHOD__, '6.5.0', 'wp_copy_parent_attachment_properties()' );

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$parent = get_post( $parent_attachment_id );

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$parent_url = wp_get_attachment_url( $parent->ID );

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$url = str_replace( wp_basename( $parent_url ), wp_basename( $cropped ), $parent_url );

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$size = wp_getimagesize( $cropped );

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$image_type = ( $size ) ? $size['mime'] : 'image/jpeg';

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$attachment = array(

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'ID' => $parent_attachment_id,

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'post_title' => wp_basename( $cropped ),

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'post_content' => $url,

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'post_mime_type' => $image_type,

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'guid' => $url,

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'context' => 'site-icon',

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);

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return $attachment;

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}

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/**

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* Inserts an attachment.

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* @since 4.3.0

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* @param array $attachment An array with attachment object data.

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* @param string $file File path of the attached image.

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* @return int Attachment ID.

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public function insert_attachment( $attachment, $file ) {

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$attachment_id = wp_insert_attachment( $attachment, $file );

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$metadata = wp_generate_attachment_metadata( $attachment_id, $file );

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/**

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* Filters the site icon attachment metadata.

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* @since 4.3.0

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* @see wp_generate_attachment_metadata()

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* @param array $metadata Attachment metadata.

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$metadata = apply_filters( 'site_icon_attachment_metadata', $metadata );

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wp_update_attachment_metadata( $attachment_id, $metadata );

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return $attachment_id;

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}

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/**

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* Adds additional sizes to be made when creating the site icon images.

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* @since 4.3.0

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* @param array[] $sizes Array of arrays containing information for additional sizes.

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* @return array[] Array of arrays containing additional image sizes.

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public function additional_sizes( $sizes = array() ) {

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$only_crop_sizes = array();

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/**

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* Filters the different dimensions that a site icon is saved in.

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* @since 4.3.0

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* @param int[] $site_icon_sizes Array of sizes available for the Site Icon.

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$this->site_icon_sizes = apply_filters( 'site_icon_image_sizes', $this->site_icon_sizes );

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// Use a natural sort of numbers.

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natsort( $this->site_icon_sizes );

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$this->site_icon_sizes = array_reverse( $this->site_icon_sizes );

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// Ensure that we only resize the image into sizes that allow cropping.

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foreach ( $sizes as $name => $size_array ) {

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if ( isset( $size_array['crop'] ) ) {

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$only_crop_sizes[ $name ] = $size_array;

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}

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}

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foreach ( $this->site_icon_sizes as $size ) {

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if ( $size < $this->min_size ) {

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$only_crop_sizes[ 'site_icon-' . $size ] = array(

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'width ' => $size,

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'height' => $size,

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'crop' => true,

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);

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}

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}

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return $only_crop_sizes;

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}

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/**

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* Adds Site Icon sizes to the array of image sizes on demand.

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* @since 4.3.0

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* @param string[] $sizes Array of image size names.

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* @return string[] Array of image size names.

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public function intermediate_image_sizes( $sizes = array() ) {

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/** This filter is documented in wp-admin/includes/class-wp-site-icon.php */

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$this->site_icon_sizes = apply_filters( 'site_icon_image_sizes', $this->site_icon_sizes );

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foreach ( $this->site_icon_sizes as $size ) {

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$sizes[] = 'site_icon-' . $size;

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}

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return $sizes;

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}

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/**

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* Deletes the Site Icon when the image file is deleted.

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* @since 4.3.0

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* @param int $post_id Attachment ID.

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public function delete_attachment_data( $post_id ) {

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$site_icon_id = (int) get_option( 'site_icon' );

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if ( $site_icon_id && $post_id === $site_icon_id ) {

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delete_option( 'site_icon' );

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}

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}

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/**

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* Adds custom image sizes when meta data for an image is requested, that happens to be used as Site Icon.

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* @since 4.3.0

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* @param null|array|string $value The value get_metadata() should return a single metadata value, or an

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* array of values.

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* @param int $post_id Post ID.

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* @param string $meta_key Meta key.

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* @param bool $single Whether to return only the first value of the specified `$meta_key`.

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* @return array|null|string The attachment metadata value, array of values, or null.

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public function get_post_metadata( $value, $post_id, $meta_key, $single ) {

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if ( $single && '_wp_attachment_backup_sizes' === $meta_key ) {

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$site_icon_id = (int) get_option( 'site_icon' );

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if ( $post_id === $site_icon_id ) {

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add_filter( 'intermediate_image_sizes', array( $this, 'intermediate_image_sizes' ) );

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}

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}

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return $value;

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}

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}

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