WordPress 4.2.4-scripts

[autoinstalls/wordpress.git] / wp-includes / class-wp-walker.php

diff --git a/wp-includes/class-wp-walker.php b/wp-includes/class-wp-walker.php
index 25e040592cf87c170b44c65b3d5ec5c5827fa095..f1d759789244115730fab602dc7285bb02801d7f 100644 (file)
--- a/wp-includes/class-wp-walker.php
+++ b/wp-includes/class-wp-walker.php
@@ -2,14 +2,13 @@
 /**
  * A class for displaying various tree-like structures.
  *
 /**
  * A class for displaying various tree-like structures.
  *

- * Extend the Walker class to use it, see examples at the below. Child classes
+ * Extend the Walker class to use it, see examples below. Child classes

  * do not need to implement all of the abstract methods in the class. The child
  * do not need to implement all of the abstract methods in the class. The child

- * only needs to implement the methods that are needed. Also, the methods are
- * not strictly abstract in that the parameter definition needs to be followed.
- * The child classes can have additional parameters.
+ * only needs to implement the methods that are needed.

  *
  *

- * @package WordPress

  * @since 2.1.0
  * @since 2.1.0

+ *
+ * @package WordPress

  * @abstract
  */
 class Walker {
  * @abstract
  */
 class Walker {


@@ -17,83 +16,98 @@ class Walker {
         * What the class handles.
         *
         * @since 2.1.0
         * What the class handles.
         *
         * @since 2.1.0

-        * @var string

         * @access public
         * @access public

+        * @var string

         */
         */

-       var $tree_type;
+       public $tree_type;

 
        /**
         * DB fields to use.
         *
         * @since 2.1.0
         * @var array
 
        /**
         * DB fields to use.
         *
         * @since 2.1.0
         * @var array

-        * @access protected

         */
         */

-       var $db_fields;
+       public $db_fields;

 
        /**
         * Max number of pages walked by the paged walker
         *
         * @since 2.7.0
         * @var int
 
        /**
         * Max number of pages walked by the paged walker
         *
         * @since 2.7.0
         * @var int

-        * @access protected

         */
         */

-       var $max_pages = 1;
+       public $max_pages = 1;
+
+       /**
+        * Whether the current element has children or not.
+        *
+        * To be used in start_el().
+        *
+        * @since 4.0.0
+        * @var bool
+        */
+       public $has_children;

 
        /**
         * Starts the list before the elements are added.
         *
 
        /**
         * Starts the list before the elements are added.
         *

-        * Additional parameters are used in child classes. The args parameter holds
-        * additional values that may be used with the child class methods. This
-        * method is called at the start of the output list.
+        * The $args parameter holds additional values that may be used with the child
+        * class methods. This method is called at the start of the output list.

         *
         * @since 2.1.0
         * @abstract
         *
         * @param string $output Passed by reference. Used to append additional content.
         *
         * @since 2.1.0
         * @abstract
         *
         * @param string $output Passed by reference. Used to append additional content.

+        * @param int    $depth  Depth of the item.
+        * @param array  $args   An array of additional arguments.

         */
         */

-       function start_lvl(&$output) {}
+       public function start_lvl( &$output, $depth = 0, $args = array() ) {}

 
        /**
         * Ends the list of after the elements are added.
         *
 
        /**
         * Ends the list of after the elements are added.
         *

-        * Additional parameters are used in child classes. The args parameter holds
-        * additional values that may be used with the child class methods. This
-        * method finishes the list at the end of output of the elements.
+        * The $args parameter holds additional values that may be used with the child
+        * class methods. This method finishes the list at the end of output of the elements.

         *
         * @since 2.1.0
         * @abstract
         *
         * @param string $output Passed by reference. Used to append additional content.
         *
         * @since 2.1.0
         * @abstract
         *
         * @param string $output Passed by reference. Used to append additional content.

+        * @param int    $depth  Depth of the item.
+        * @param array  $args   An array of additional arguments.

         */
         */

-       function end_lvl(&$output)   {}
+       public function end_lvl( &$output, $depth = 0, $args = array() ) {}

 
        /**
         * Start the element output.
         *
 
        /**
         * Start the element output.
         *

-        * Additional parameters are used in child classes. The args parameter holds
-        * additional values that may be used with the child class methods. Includes
-        * the element output also.
+        * The $args parameter holds additional values that may be used with the child
+        * class methods. Includes the element output also.

         *
         * @since 2.1.0
         * @abstract
         *
         *
         * @since 2.1.0
         * @abstract
         *

-        * @param string $output Passed by reference. Used to append additional content.
+        * @param string $output            Passed by reference. Used to append additional content.
+        * @param object $object            The data object.
+        * @param int    $depth             Depth of the item.
+        * @param array  $args              An array of additional arguments.
+        * @param int    $current_object_id ID of the current item.

         */
         */

-       function start_el(&$output)  {}
+       public function start_el( &$output, $object, $depth = 0, $args = array(), $current_object_id = 0 ) {}

 
        /**
         * Ends the element output, if needed.
         *
 
        /**
         * Ends the element output, if needed.
         *

-        * Additional parameters are used in child classes. The args parameter holds
-        * additional values that may be used with the child class methods.
+        * The $args parameter holds additional values that may be used with the child class methods.

         *
         * @since 2.1.0
         * @abstract
         *
         * @param string $output Passed by reference. Used to append additional content.
         *
         * @since 2.1.0
         * @abstract
         *
         * @param string $output Passed by reference. Used to append additional content.

+        * @param object $object The data object.
+        * @param int    $depth  Depth of the item.
+        * @param array  $args   An array of additional arguments.

         */
         */

-       function end_el(&$output)    {}
+       public function end_el( &$output, $object, $depth = 0, $args = array() ) {}

 
        /**
         * Traverse elements to create list from elements.
 
        /**
         * Traverse elements to create list from elements.


@@ -103,32 +117,34 @@ class Walker {
         * depth and no ignore elements under that depth. It is possible to set the
         * max depth to include all depths, see walk() method.
         *
         * depth and no ignore elements under that depth. It is possible to set the
         * max depth to include all depths, see walk() method.
         *

-        * This method shouldn't be called directly, use the walk() method instead.
+        * This method should not be called directly, use the walk() method instead.

         *
         * @since 2.5.0
         *
         *
         * @since 2.5.0
         *

-        * @param object $element Data object
-        * @param array $children_elements List of elements to continue traversing.
-        * @param int $max_depth Max depth to traverse.
-        * @param int $depth Depth of current element.
-        * @param array $args
-        * @param string $output Passed by reference. Used to append additional content.
+        * @param object $element           Data object.
+        * @param array  $children_elements List of elements to continue traversing.
+        * @param int    $max_depth         Max depth to traverse.
+        * @param int    $depth             Depth of current element.
+        * @param array  $args              An array of arguments.
+        * @param string $output            Passed by reference. Used to append additional content.

         * @return null Null on failure with no changes to parameters.
         */
         * @return null Null on failure with no changes to parameters.
         */

-       function display_element( $element, &$children_elements, $max_depth, $depth=0, $args, &$output ) {
+       public function display_element( $element, &$children_elements, $max_depth, $depth, $args, &$output ) {

 
                if ( !$element )
                        return;
 
                $id_field = $this->db_fields['id'];
 
                if ( !$element )
                        return;
 
                $id_field = $this->db_fields['id'];

+               $id       = $element->$id_field;

 
                //display this element
 
                //display this element

-               if ( is_array( $args[0] ) )
-                       $args[0]['has_children'] = ! empty( $children_elements[$element->$id_field] );
-               $cb_args = array_merge( array(&$output, $element, $depth), $args);
-               call_user_func_array(array(&$this, 'start_el'), $cb_args);
+               $this->has_children = ! empty( $children_elements[ $id ] );
+               if ( isset( $args[0] ) && is_array( $args[0] ) ) {
+                       $args[0]['has_children'] = $this->has_children; // Backwards compatibility.
+               }

 
 

-               $id = $element->$id_field;
+               $cb_args = array_merge( array(&$output, $element, $depth), $args);
+               call_user_func_array(array($this, 'start_el'), $cb_args);

 
                // descend only when the depth is right and there are childrens for this element
                if ( ($max_depth == 0 || $max_depth > $depth+1 ) && isset( $children_elements[$id]) ) {
 
                // descend only when the depth is right and there are childrens for this element
                if ( ($max_depth == 0 || $max_depth > $depth+1 ) && isset( $children_elements[$id]) ) {


@@ -139,7 +155,7 @@ class Walker {
                                        $newlevel = true;
                                        //start the child delimiter
                                        $cb_args = array_merge( array(&$output, $depth), $args);
                                        $newlevel = true;
                                        //start the child delimiter
                                        $cb_args = array_merge( array(&$output, $depth), $args);

-                                       call_user_func_array(array(&$this, 'start_lvl'), $cb_args);
+                                       call_user_func_array(array($this, 'start_lvl'), $cb_args);

                                }
                                $this->display_element( $child, $children_elements, $max_depth, $depth + 1, $args, $output );
                        }
                                }
                                $this->display_element( $child, $children_elements, $max_depth, $depth + 1, $args, $output );
                        }


@@ -149,29 +165,30 @@ class Walker {
                if ( isset($newlevel) && $newlevel ){
                        //end the child delimiter
                        $cb_args = array_merge( array(&$output, $depth), $args);
                if ( isset($newlevel) && $newlevel ){
                        //end the child delimiter
                        $cb_args = array_merge( array(&$output, $depth), $args);

-                       call_user_func_array(array(&$this, 'end_lvl'), $cb_args);
+                       call_user_func_array(array($this, 'end_lvl'), $cb_args);

                }
 
                //end this element
                $cb_args = array_merge( array(&$output, $element, $depth), $args);
                }
 
                //end this element
                $cb_args = array_merge( array(&$output, $element, $depth), $args);

-               call_user_func_array(array(&$this, 'end_el'), $cb_args);
+               call_user_func_array(array($this, 'end_el'), $cb_args);

        }
 
        /**
         * Display array of elements hierarchically.
         *
        }
 
        /**
         * Display array of elements hierarchically.
         *

-        * It is a generic function which does not assume any existing order of
-        * elements. max_depth = -1 means flatly display every element. max_depth =
-        * 0 means display all levels. max_depth > 0  specifies the number of
-        * display levels.
+        * Does not assume any existing order of elements.
+        *
+        * $max_depth = -1 means flatly display every element.
+        * $max_depth = 0 means display all levels.
+        * $max_depth > 0 specifies the number of display levels.

         *
         * @since 2.1.0
         *
         *
         * @since 2.1.0
         *

-        * @param array $elements
-        * @param int $max_depth
-        * @return string
+        * @param array $elements  An array of elements.
+        * @param int   $max_depth The maximum hierarchical depth.
+        * @return string The hierarchical item output.

         */
         */

-       function walk( $elements, $max_depth) {
+       public function walk( $elements, $max_depth) {

 
                $args = array_slice(func_get_args(), 2);
                $output = '';
 
                $args = array_slice(func_get_args(), 2);
                $output = '';


@@ -182,7 +199,6 @@ class Walker {
                if (empty($elements)) //nothing to walk
                        return $output;
 
                if (empty($elements)) //nothing to walk
                        return $output;
 

-               $id_field = $this->db_fields['id'];

                $parent_field = $this->db_fields['parent'];
 
                // flat display
                $parent_field = $this->db_fields['parent'];
 
                // flat display


@@ -194,10 +210,10 @@ class Walker {
                }
 
                /*
                }
 
                /*

-                * need to display in hierarchical order
-                * separate elements into two buckets: top level and children elements
-                * children_elements is two dimensional array, eg.
-                * children_elements[10][] contains all sub-elements whose parent is 10.
+                * Need to display in hierarchical order.
+                * Separate elements into two buckets: top level and children elements.
+                * Children_elements is two dimensional array, eg.
+                * Children_elements[10][] contains all sub-elements whose parent is 10.

                 */
                $top_level_elements = array();
                $children_elements  = array();
                 */
                $top_level_elements = array();
                $children_elements  = array();


@@ -209,8 +225,8 @@ class Walker {
                }
 
                /*
                }
 
                /*

-                * when none of the elements is top level
-                * assume the first one must be root of the sub elements
+                * When none of the elements is top level.
+                * Assume the first one must be root of the sub elements.

                 */
                if ( empty($top_level_elements) ) {
 
                 */
                if ( empty($top_level_elements) ) {
 


@@ -231,8 +247,8 @@ class Walker {
                        $this->display_element( $e, $children_elements, $max_depth, 0, $args, $output );
 
                /*
                        $this->display_element( $e, $children_elements, $max_depth, 0, $args, $output );
 
                /*

-                * if we are displaying all levels, and remaining children_elements is not empty,
-                * then we got orphans, which should be displayed regardless
+                * If we are displaying all levels, and remaining children_elements is not empty,
+                * then we got orphans, which should be displayed regardless.

                 */
                if ( ( $max_depth == 0 ) && count( $children_elements ) > 0 ) {
                        $empty_array = array();
                 */
                if ( ( $max_depth == 0 ) && count( $children_elements ) > 0 ) {
                        $empty_array = array();


@@ -251,13 +267,16 @@ class Walker {
         * and number of elements per page, this function first determines all top level root elements
         * belonging to that page, then lists them and all of their children in hierarchical order.
         *
         * and number of elements per page, this function first determines all top level root elements
         * belonging to that page, then lists them and all of their children in hierarchical order.
         *

-        * @package WordPress
-        * @since 2.7
-        * @param int $max_depth = 0 means display all levels; $max_depth > 0 specifies the number of display levels.
-        * @param int $page_num the specific page number, beginning with 1.
-        * @return XHTML of the specified page of elements
+        * $max_depth = 0 means display all levels.
+        * $max_depth > 0 specifies the number of display levels.
+        *
+        * @since 2.7.0
+        *
+        * @param int $max_depth The maximum hierarchical depth.
+        * @param int $page_num  The specific page number, beginning with 1.
+        * @return string XHTML of the specified page of elements

         */
         */

-       function paged_walk( $elements, $max_depth, $page_num, $per_page ) {
+       public function paged_walk( $elements, $max_depth, $page_num, $per_page ) {

 
                /* sanity check */
                if ( empty($elements) || $max_depth < -1 )
 
                /* sanity check */
                if ( empty($elements) || $max_depth < -1 )


@@ -266,7 +285,6 @@ class Walker {
                $args = array_slice( func_get_args(), 4 );
                $output = '';
 
                $args = array_slice( func_get_args(), 4 );
                $output = '';
 

-               $id_field = $this->db_fields['id'];

                $parent_field = $this->db_fields['parent'];
 
                $count = -1;
                $parent_field = $this->db_fields['parent'];
 
                $count = -1;


@@ -309,9 +327,9 @@ class Walker {
                }
 
                /*
                }
 
                /*

-                * separate elements into two buckets: top level and children elements
-                * children_elements is two dimensional array, eg.
-                * children_elements[10][] contains all sub-elements whose parent is 10.
+                * Separate elements into two buckets: top level and children elements.
+                * Children_elements is two dimensional array, e.g.
+                * $children_elements[10][] contains all sub-elements whose parent is 10.

                 */
                $top_level_elements = array();
                $children_elements  = array();
                 */
                $top_level_elements = array();
                $children_elements  = array();


@@ -342,7 +360,7 @@ class Walker {
                foreach ( $top_level_elements as $e ) {
                        $count++;
 
                foreach ( $top_level_elements as $e ) {
                        $count++;
 

-                       //for the last page, need to unset earlier children in order to keep track of orphans
+                       // For the last page, need to unset earlier children in order to keep track of orphans.

                        if ( $end >= $total_top && $count < $start )
                                        $this->unset_children( $e, $children_elements );
 
                        if ( $end >= $total_top && $count < $start )
                                        $this->unset_children( $e, $children_elements );
 


@@ -365,7 +383,7 @@ class Walker {
                return $output;
        }
 
                return $output;
        }
 

-       function get_number_of_root_elements( $elements ){
+       public function get_number_of_root_elements( $elements ){

 
                $num = 0;
                $parent_field = $this->db_fields['parent'];
 
                $num = 0;
                $parent_field = $this->db_fields['parent'];


@@ -377,8 +395,8 @@ class Walker {
                return $num;
        }
 
                return $num;
        }
 

-       // unset all the children for a given top level element
-       function unset_children( $e, &$children_elements ){
+       // Unset all the children for a given top level element.
+       public function unset_children( $e, &$children_elements ){

 
                if ( !$e || !$children_elements )
                        return;
 
                if ( !$e || !$children_elements )
                        return;


@@ -394,6 +412,5 @@ class Walker {
                        unset( $children_elements[$id] );
 
        }
                        unset( $children_elements[$id] );
 
        }

-}

 
 

-?>
\ No newline at end of file
+} // Walker