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<?php |
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/** |
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* Thumbnail enhancements for the "Posts" screens on WordPress.com sites. |
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* |
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* @package automattic/jetpack-wpcom-posts |
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*/ |
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namespace Automattic\Jetpack\WPcom\Posts; |
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/** |
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* Class Thumbnail. |
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*/ |
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class Thumbnail { |
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/** |
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* Thumbnail constructor. |
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*/ |
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public function __construct() { |
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add_filter( 'manage_posts_columns', array( $this, 'add_posts_column_header' ) ); |
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add_filter( 'manage_pages_columns', array( $this, 'add_posts_column_header' ) ); |
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add_action( 'manage_posts_custom_column', array( $this, 'display_posts_column_content' ), 10, 2 ); |
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add_action( 'manage_pages_custom_column', array( $this, 'display_posts_column_content' ), 10, 2 ); |
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add_action( 'admin_print_styles-edit.php', array( $this, 'load_columns_css' ) ); |
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} |
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/** |
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* Adds a new column header for displaying the thumbnail of a post. |
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* |
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* @param array $columns An array of column names. |
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* @return array An array of column names. |
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*/ |
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public function add_posts_column_header( $columns ) { |
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// Place if before author. |
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$pos = array_search( 'author', array_keys( $columns ), true ); |
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if ( ! is_int( $pos ) ) { |
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return $columns; |
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} |
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$chunks = array_chunk( $columns, $pos, true ); |
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$chunks[0]['thumbnail'] = ''; // Deliberately empty. |
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return call_user_func_array( 'array_merge', $chunks ); |
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} |
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/** |
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* Displays the thumbnail content. |
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* |
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* @param string $column The name of the column to display. |
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* @param int $post_id The current post ID. |
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*/ |
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public function display_posts_column_content( $column, $post_id ) { |
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if ( 'thumbnail' !== $column ) { |
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return; |
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} |
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echo get_the_post_thumbnail( $post_id, array( 50, 50 ), array( 'style' => 'height: auto;' ) ); |
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} |
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/** |
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* Load CSS needed for the thumbnail column. |
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*/ |
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public function load_columns_css() { |
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?> |
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<style type="text/css"> |
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.fixed .column-thumbnail { |
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width: 5em; |
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} |
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</style> |
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<?php |
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} |
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} |
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Automattic /
jetpack
