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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;
	}
}

Nama File / Folder	Size	Action
admin-filters.php	6.676KB	Edit File Delete File Rename
admin.php	2.879KB	Edit File Delete File Rename
ajax-actions.php	125.452KB	Edit File Delete File Rename
class-automatic-upgrader-skin.php	3.027KB	Edit File Delete File Rename
class-bulk-theme-upgrader-skin.php	1.895KB	Edit File Delete File Rename
class-bulk-upgrader-skin.php	5.078KB	Edit File Delete File Rename
class-file-upload-upgrader.php	3.181KB	Edit File Delete File Rename
class-ftp-pure.php	5.272KB	Edit File Delete File Rename
class-language-pack-upgrader-skin.php	2.133KB	Edit File Delete File Rename
class-language-pack-upgrader.php	10.806KB	Edit File Delete File Rename
class-pclzip.php	191.206KB	Edit File Delete File Rename
class-plugin-installer-skin.php	4.205KB	Edit File Delete File Rename
class-plugin-upgrader-skin.php	2.496KB	Edit File Delete File Rename
class-plugin-upgrader.php	14.319KB	Edit File Delete File Rename
class-theme-installer-skin.php	3.985KB	Edit File Delete File Rename
class-theme-upgrader-skin.php	3.344KB	Edit File Delete File Rename
class-walker-category-checklist.php	4.115KB	Edit File Delete File Rename
class-walker-nav-menu-checklist.php	4.813KB	Edit File Delete File Rename
class-wp-comments-list-table.php	25.037KB	Edit File Delete File Rename
class-wp-filesystem-base.php	21.664KB	Edit File Delete File Rename
class-wp-filesystem-direct.php	10.959KB	Edit File Delete File Rename
class-wp-filesystem-ftpext.php	13.149KB	Edit File Delete File Rename
class-wp-filesystem-ftpsockets.php	10.338KB	Edit File Delete File Rename
class-wp-filesystem-ssh2.php	14.612KB	Edit File Delete File Rename
class-wp-importer.php	7.17KB	Edit File Delete File Rename
class-wp-internal-pointers.php	5.392KB	Edit File Delete File Rename
class-wp-links-list-table.php	7.424KB	Edit File Delete File Rename
class-wp-list-table-compat.php	1.043KB	Edit File Delete File Rename
class-wp-media-list-table.php	22.11KB	Edit File Delete File Rename
class-wp-ms-sites-list-table.php	15.191KB	Edit File Delete File Rename
class-wp-ms-themes-list-table.php	19.758KB	Edit File Delete File Rename
class-wp-ms-users-list-table.php	12.541KB	Edit File Delete File Rename
class-wp-plugin-install-list-table.php	18.895KB	Edit File Delete File Rename
class-wp-plugins-list-table.php	32.049KB	Edit File Delete File Rename
class-wp-post-comments-list-table.php	1.438KB	Edit File Delete File Rename
class-wp-posts-list-table.php	51.479KB	Edit File Delete File Rename
class-wp-screen.php	33.513KB	Edit File Delete File Rename
class-wp-site-icon.php	5.901KB	Edit File Delete File Rename
class-wp-terms-list-table.php	17.536KB	Edit File Delete File Rename
class-wp-theme-install-list-table.php	14.184KB	Edit File Delete File Rename
class-wp-themes-list-table.php	9.05KB	Edit File Delete File Rename
class-wp-upgrader-stat.php	0.367KB	Edit File Delete File Rename
class-wp-upgrader.php	33.118KB	Edit File Delete File Rename
class-wp-users-list-table.php	16.877KB	Edit File Delete File Rename
comment.php	5.592KB	Edit File Delete File Rename
continents-cities.php	19.042KB	Edit File Delete File Rename
edit-tag-messages.php	1.378KB	Edit File Delete File Rename
file.php	80.229KB	Edit File Delete File Rename
image-edit.php	32.767KB	Edit File Delete File Rename
image.php	21.579KB	Edit File Delete File Rename
import-queue.php	0.978KB	Edit File Delete File Rename
import.php	6.1KB	Edit File Delete File Rename
list-table.php	2.586KB	Edit File Delete File Rename
media.php	103.831KB	Edit File Delete File Rename
menu.php	8.511KB	Edit File Delete File Rename
misc.php	61.826KB	Edit File Delete File Rename
ms-admin-filters.php	1.354KB	Edit File Delete File Rename
ms-deprecated.php	2.793KB	Edit File Delete File Rename
ms.php	34.576KB	Edit File Delete File Rename
nav-menu.php	41.474KB	Edit File Delete File Rename
network.php	23.319KB	Edit File Delete File Rename
noop.php	1.193KB	Edit File Delete File Rename
options.php	3.742KB	Edit File Delete File Rename
plugin-install.php	30.957KB	Edit File Delete File Rename
revision.php	14.597KB	Edit File Delete File Rename
screen.php	6.004KB	Edit File Delete File Rename
taxonomy.php	7.546KB	Edit File Delete File Rename
template.php	78.074KB	Edit File Delete File Rename
theme-install.php	6.139KB	Edit File Delete File Rename
theme.php	27.67KB	Edit File Delete File Rename
translation-install.php	8.351KB	Edit File Delete File Rename
update.php	25.267KB	Edit File Delete File Rename
upgrade.php	93.633KB	Edit File Delete File Rename
user.php	48.255KB	Edit File Delete File Rename
widgets.php	9.767KB	Edit File Delete File Rename