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Media: Introduce the admin_post_thumbnail_size filter, which enables manipulation of the image size used to display the post thumbnail in the 'Featured Image' meta box.

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This filter has no effect on the image size used to display post thumbnails on the front-end.

Props dboulet, DrewAPicture.
Fixes #28512.


git-svn-id: https://develop.svn.wordpress.org/trunk@35022 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Drew Jaynes 2015-10-11 16:53:35 +00:00
parent bf0fa3a570
commit 4d98b99cc3
1 changed files with 25 additions and 4 deletions
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29
src/wp-admin/includes/post.php
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@ -1396,10 +1396,31 @@ function _wp_post_thumbnail_html( $thumbnail_id = null, $post = null ) {
if ( $thumbnail_id && get_post( $thumbnail_id ) ) {
$old_content_width = $content_width;
$content_width = 266;
if ( !isset( $_wp_additional_image_sizes['post-thumbnail'] ) )
$thumbnail_html = wp_get_attachment_image( $thumbnail_id, array( $content_width, $content_width ) );
else
$thumbnail_html = wp_get_attachment_image( $thumbnail_id, 'post-thumbnail' );
$size = isset( $_wp_additional_image_sizes['post-thumbnail'] ) ? 'post-thumbnail' : array( $content_width, $content_width );
/**
* Filter the size used to display the post thumbnail image in the 'Featured Image' meta box.
*
* Note: When a theme adds 'post-thumbnail' support, a special 'post-thumbnail'
* image size is registered, which differs from the 'thumbnail' image size
* managed via the Settings > Media screen. See the `$size` parameter description
* for more information on default values.
*
* @since 4.4.0
*
* @param string|array $size Post thumbnail image size to display in the meta box. Accepts
* any valid image size, or an array of height and width values.
* If the 'post-thumbnail' size is set, default is 'post-thumbnail'.
* Otherwise, default is an array with `$content_width` as the
* height and width values.
* @param int $thumbnail_id Post thumbnail attachment ID.
* @param WP_Post $post The post object associated with the thumbnail.
*/
$size = apply_filters( 'admin_post_thumbnail_size', $size, $thumbnail_id, $post );
$thumbnail_html = wp_get_attachment_image( $thumbnail_id, $size );
if ( !empty( $thumbnail_html ) ) {
$ajax_nonce = wp_create_nonce( 'set_post_thumbnail-' . $post->ID );
$content = sprintf( $set_thumbnail_link,