<?php

/**

 * WordPress Administration Screen API.

 *

 * @package WordPress

 * @subpackage Administration

 */

/**

 * Get the column headers for a screen

 *

 * @since 2.7.0

 *

 * @staticvar array $column_headers

 *

 * @param string|WP_Screen $screen The screen you want the headers for

 * @return array Containing the headers in the format id => UI String

 */

function get_column_headers( $screen ) {

	if ( is_string( $screen ) ) {

		$screen = convert_to_screen( $screen );

	}

	static $column_headers = array();

	if ( ! isset( $column_headers[ $screen->id ] ) ) {

		/**

		 * Filters the column headers for a list table on a specific screen.

		 *

		 * The dynamic portion of the hook name, `$screen->id`, refers to the

		 * ID of a specific screen. For example, the screen ID for the Posts

		 * list table is edit-post, so the filter for that screen would be

		 * manage_edit-post_columns.

		 *

		 * @since 3.0.0

		 *

		 * @param array $columns An array of column headers. Default empty.

		 */

		$column_headers[ $screen->id ] = apply_filters( "manage_{$screen->id}_columns", array() );

	}

	return $column_headers[ $screen->id ];

}

/**

 * Get a list of hidden columns.

 *

 * @since 2.7.0

 *

 * @param string|WP_Screen $screen The screen you want the hidden columns for

 * @return array

 */

function get_hidden_columns( $screen ) {

	if ( is_string( $screen ) ) {

		$screen = convert_to_screen( $screen );

	}

	$hidden = get_user_option( 'manage' . $screen->id . 'columnshidden' );

	$use_defaults = ! is_array( $hidden );

	if ( $use_defaults ) {

		$hidden = array();

		/**

		 * Filters the default list of hidden columns.

		 *

		 * @since 4.4.0

		 *

		 * @param array     $hidden An array of columns hidden by default.

		 * @param WP_Screen $screen WP_Screen object of the current screen.

		 */

		$hidden = apply_filters( 'default_hidden_columns', $hidden, $screen );

	}

	/**

	 * Filters the list of hidden columns.

	 *

	 * @since 4.4.0

	 * @since 4.4.1 Added the `use_defaults` parameter.

	 *

	 * @param array     $hidden An array of hidden columns.

	 * @param WP_Screen $screen WP_Screen object of the current screen.

	 * @param bool      $use_defaults Whether to show the default columns.

	 */

	return apply_filters( 'hidden_columns', $hidden, $screen, $use_defaults );

}

/**

 * Prints the meta box preferences for screen meta.

 *

 * @since 2.7.0

 *

 * @global array $wp_meta_boxes

 *

 * @param WP_Screen $screen

 */

function meta_box_prefs( $screen ) {

	global $wp_meta_boxes;

	if ( is_string( $screen ) ) {

		$screen = convert_to_screen( $screen );

	}

	if ( empty( $wp_meta_boxes[ $screen->id ] ) ) {

		return;

	}

	$hidden = get_hidden_meta_boxes( $screen );

	foreach ( array_keys( $wp_meta_boxes[ $screen->id ] ) as $context ) {

		foreach ( array( 'high', 'core', 'default', 'low' ) as $priority ) {

			if ( ! isset( $wp_meta_boxes[ $screen->id ][ $context ][ $priority ] ) ) {

				continue;

			}

			foreach ( $wp_meta_boxes[ $screen->id ][ $context ][ $priority ] as $box ) {

				if ( false == $box || ! $box['title'] ) {

					continue;

				}

				// Submit box cannot be hidden

				if ( 'submitdiv' == $box['id'] || 'linksubmitdiv' == $box['id'] ) {

					continue;

				}

				$widget_title = $box['title'];

				if ( is_array( $box['args'] ) && isset( $box['args']['__widget_basename'] ) ) {

					$widget_title = $box['args']['__widget_basename'];

				}

				printf(

					'<label for="%1$s-hide"><input class="hide-postbox-tog" name="%1$s-hide" type="checkbox" id="%1$s-hide" value="%1$s" %2$s />%3$s</label>',

					esc_attr( $box['id'] ),

					checked( in_array( $box['id'], $hidden ), false, false ),

					$widget_title

				);

			}

		}

	}

}

/**

 * Get Hidden Meta Boxes

 *

 * @since 2.7.0

 *

 * @param string|WP_Screen $screen Screen identifier

 * @return array Hidden Meta Boxes

 */

function get_hidden_meta_boxes( $screen ) {

	if ( is_string( $screen ) ) {

		$screen = convert_to_screen( $screen );

	}

	$hidden = get_user_option( "metaboxhidden_{$screen->id}" );

	$use_defaults = ! is_array( $hidden );

	// Hide slug boxes by default

	if ( $use_defaults ) {

		$hidden = array();

		if ( 'post' == $screen->base ) {

			if ( 'post' == $screen->post_type || 'page' == $screen->post_type || 'attachment' == $screen->post_type ) {

				$hidden = array( 'slugdiv', 'trackbacksdiv', 'postcustom', 'postexcerpt', 'commentstatusdiv', 'commentsdiv', 'authordiv', 'revisionsdiv' );

			} else {

				$hidden = array( 'slugdiv' );

			}

		}

		/**

		 * Filters the default list of hidden meta boxes.

		 *

		 * @since 3.1.0

		 *

		 * @param array     $hidden An array of meta boxes hidden by default.

		 * @param WP_Screen $screen WP_Screen object of the current screen.

		 */

		$hidden = apply_filters( 'default_hidden_meta_boxes', $hidden, $screen );

	}

	/**

	 * Filters the list of hidden meta boxes.

	 *

	 * @since 3.3.0

	 *

	 * @param array     $hidden       An array of hidden meta boxes.

	 * @param WP_Screen $screen       WP_Screen object of the current screen.

	 * @param bool      $use_defaults Whether to show the default meta boxes.

	 *                                Default true.

	 */

	return apply_filters( 'hidden_meta_boxes', $hidden, $screen, $use_defaults );

}

/**

 * Register and configure an admin screen option

 *

 * @since 3.1.0

 *

 * @param string $option An option name.

 * @param mixed $args Option-dependent arguments.

 */

function add_screen_option( $option, $args = array() ) {

	$current_screen = get_current_screen();

	if ( ! $current_screen ) {

		return;

	}

	$current_screen->add_option( $option, $args );

}

/**

 * Get the current screen object

 *

 * @since 3.1.0

 *

 * @global WP_Screen $current_screen

 *

 * @return WP_Screen|null Current screen object or null when screen not defined.

 */

function get_current_screen() {

	global $current_screen;

	if ( ! isset( $current_screen ) ) {

		return null;

	}

	return $current_screen;

}

/**

 * Set the current screen object

 *

 * @since 3.0.0

 *

 * @param mixed $hook_name Optional. The hook name (also known as the hook suffix) used to determine the screen,

 *                         or an existing screen object.

 */

function set_current_screen( $hook_name = '' ) {

	WP_Screen::get( $hook_name )->set_current_screen();

}