Sync plugins from current page

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/advanced-custom-fields/includes/locations/class-acf-location-page-parent.php

@@ -0,0 +1,100 @@
+<?php 
+
+if( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
+
+if( ! class_exists('acf_location_page_parent') ) :
+
+class acf_location_page_parent extends acf_location {
+	
+	
+	/*
+	*  __construct
+	*
+	*  This function will setup the class functionality
+	*
+	*  @type	function
+	*  @date	5/03/2014
+	*  @since	5.0.0
+	*
+	*  @param	n/a
+	*  @return	n/a
+	*/
+	
+	function initialize() {
+		
+		// vars
+		$this->name = 'page_parent';
+		$this->label = __("Page Parent",'acf');
+		$this->category = 'page';
+    	
+	}
+	
+	
+	/*
+	*  rule_match
+	*
+	*  This function is used to match this location $rule to the current $screen
+	*
+	*  @type	function
+	*  @date	3/01/13
+	*  @since	3.5.7
+	*
+	*  @param	$match (boolean) 
+	*  @param	$rule (array)
+	*  @return	$options (array)
+	*/
+	
+	function rule_match( $result, $rule, $screen ) {
+		
+		// vars
+		$post_id = acf_maybe_get( $screen, 'post_id' );
+		$page_parent = acf_maybe_get( $screen, 'page_parent' );
+		
+		
+		// no page parent
+		if( $page_parent === null ) {
+			
+			// bail early if no post id
+			if( !$post_id ) return false;
+			
+			
+			// get post parent
+			$post = get_post( $post_id );
+			$page_parent = $post->post_parent;
+			
+		}
+		
+		
+		// compare
+		return $this->compare( $page_parent, $rule );
+        
+	}
+	
+	
+	/*
+	*  rule_operators
+	*
+	*  This function returns the available values for this rule type
+	*
+	*  @type	function
+	*  @date	30/5/17
+	*  @since	5.6.0
+	*
+	*  @param	n/a
+	*  @return	(array)
+	*/
+	
+	function rule_values( $choices, $rule ) {
+		
+		return acf_get_location_rule('page')->rule_values( $choices, $rule );
+		
+	}
+	
+}
+
+// initialize
+acf_register_location_rule( 'acf_location_page_parent' );
+
+endif; // class_exists check
+
+?>