WP_Posts_List_Table::prepare_items()

Source

public function prepare_items() {
	global $mode, $avail_post_stati, $wp_query, $per_page;

	if ( ! empty( $_REQUEST['mode'] ) ) {
		$mode = 'excerpt' === $_REQUEST['mode'] ? 'excerpt' : 'list';
		set_user_setting( 'posts_list_mode', $mode );
	} else {
		$mode = get_user_setting( 'posts_list_mode', 'list' );
	}

	// Is going to call wp().
	$avail_post_stati = wp_edit_posts_query();

	$this->set_hierarchical_display(
		is_post_type_hierarchical( $this->screen->post_type )
		&& 'menu_order title' === $wp_query->query['orderby']
	);

	$post_type = $this->screen->post_type;
	$per_page  = $this->get_items_per_page( 'edit_' . $post_type . '_per_page' );

	/** This filter is documented in wp-admin/includes/post.php */
	$per_page = apply_filters( 'edit_posts_per_page', $per_page, $post_type );

	if ( $this->hierarchical_display ) {
		$total_items = $wp_query->post_count;
	} elseif ( $wp_query->found_posts || $this->get_pagenum() === 1 ) {
		$total_items = $wp_query->found_posts;
	} else {
		$post_counts = (array) wp_count_posts( $post_type, 'readable' );

		if ( isset( $_REQUEST['post_status'] ) && in_array( $_REQUEST['post_status'], $avail_post_stati, true ) ) {
			$total_items = $post_counts[ $_REQUEST['post_status'] ];
		} elseif ( isset( $_REQUEST['show_sticky'] ) && $_REQUEST['show_sticky'] ) {
			$total_items = $this->sticky_posts_count;
		} elseif ( isset( $_GET['author'] ) && get_current_user_id() === (int) $_GET['author'] ) {
			$total_items = $this->user_posts_count;
		} else {
			$total_items = array_sum( $post_counts );

			// Subtract post types that are not included in the admin all list.
			foreach ( get_post_stati( array( 'show_in_admin_all_list' => false ) ) as $state ) {
				$total_items -= $post_counts[ $state ];
			}
		}
	}

	$this->is_trash = isset( $_REQUEST['post_status'] ) && 'trash' === $_REQUEST['post_status'];

	$this->set_pagination_args(
		array(
			'total_items' => $total_items,
			'per_page'    => $per_page,
		)
	);
}

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