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WP_Posts_List_Table::prepare_items()

Source

File: wp-admin/includes/class-wp-posts-list-table.php 

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() == $_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,
			)
		);
	}

Uses

Uses Description
wp-admin/includes/class-wp-posts-list-table.php: WP_Posts_List_Table::set_hierarchical_display()

Sets whether the table layout should be hierarchical or not.
wp-admin/includes/post.php: wp_edit_posts_query()

Run the wp query to fetch the posts for listing on the edit posts page
wp-admin/includes/post.php: edit_posts_per_page

Filters the number of posts displayed per page when specifically listing “posts”.
wp-includes/plugin.php: apply_filters()

Calls the callback functions that have been added to a filter hook.
wp-includes/option.php: set_user_setting()

Adds or updates user interface setting.
wp-includes/option.php: get_user_setting()

Retrieves user interface setting value based on setting name.
wp-includes/user.php: get_current_user_id()

Get the current user’s ID
wp-includes/post.php: wp_count_posts()

Count number of posts of a post type and if user has permissions to view.
wp-includes/post.php: is_post_type_hierarchical()

Whether the post type is hierarchical.
wp-includes/post.php: get_post_stati()

Get a list of post statuses.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/wp_posts_list_table/prepare_items