/of-taxonomy-walker.php

<?php



class Taxonomy_Walker extends Walker_Category {



	

	private $type = '';

	private $defaults = array();

	private $multidepth = 0; //manually calculate depth on multiselects

	private $multilastid = 0; //manually calculate depth on multiselects

	private $multilastdepthchange = 0; //manually calculate depth on multiselects



	function __construct($type = 'checkbox', $defaults = array())  {

		// fetch the list of term ids for the given post

		//$this->term_ids = wp_get_post_terms( $post_id, $taxonomy, 'fields=ids' );

		

		$this->type = $type;

		$this->defaults = $defaults;

	}



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

		/*$display = false;

		

		$id = $element->term_id;



		$display = true;

		if ( isset( $children_elements[ $id ] ) ) {

			// the current term has children

			foreach ( $children_elements[ $id ] as $child ) {

				if ( in_array( $child->term_id, $this->term_ids ) ) {

					// one of the term's children is in the list

					$display = true;

					// can stop searching now

					break;

				}

			}

		}



		if ( $display )*/

			parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output );

	}

	

	

	function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 )

	{

	

		if($this->type=="list")

		{

			extract($args);

			

			$cat_name = esc_attr( $sf_name );

			$cat_name = apply_filters( 'list_cats', $cat_name, $category );

			$link = '<a href="' . esc_url( get_term_link($category) ) . '" ';

			if ( $use_desc_for_title == 0 || empty($category->description) )

				$link .= 'title="' . esc_attr( sprintf(__( 'View all posts filed under %s' ), $cat_name) ) . '"';

			else

				$link .= 'title="' . esc_attr( strip_tags( apply_filters( 'category_description', $category->description, $category ) ) ) . '"';

			$link .= '>';

			$link .= $cat_name . '</a>';



			if ( !empty($feed_image) || !empty($feed) ) {

				$link .= ' ';



				if ( empty($feed_image) )

					$link .= '(';



				$link .= '<a href="' . esc_url( get_term_feed_link( $category->term_id, $category->taxonomy, $feed_type ) ) . '"';



				if ( empty($feed) ) {

					$alt = ' alt="' . sprintf(__( 'Feed for all posts filed under %s' ), $cat_name ) . '"';

				} else {

					$title = ' title="' . $feed . '"';

					$alt = ' alt="' . $feed . '"';

					$name = $feed;

					$link .= $title;

				}



				$link .= '>';



				if ( empty($feed_image) )

					$link .= $name;

				else

					$link .= "<img src='$feed_image'$alt$title" . ' />';



				$link .= '</a>';



				if ( empty($feed_image) )

					$link .= ')';

			}



			if ( !empty($show_count) )

				$link .= ' (' . intval($category->count) . ')';



			if ( 'list' == $args['style'] ) {

				$output .= "\t<li";

				$class = 'cat-item cat-item-' . $category->term_id;

				if ( !empty($current_category) ) {

					$_current_category = get_term( $current_category, $category->taxonomy );

					if ( $category->term_id == $current_category )

						$class .=  ' current-cat';

					elseif ( $category->term_id == $_current_category->parent )

						$class .=  ' current-cat-parent';

				}

				$output .=  ' class="' . $class . '"';

				$output .= ">$link\n";

			} else {

				$output .= "\t$link<br />\n";

			}

		}

		else if(($this->type=="checkbox")||($this->type=="radio"))

		{

			extract($args);

			

			$cat_name = esc_attr( $category->name );

			$cat_id = esc_attr( $category->term_id );

			$cat_name = apply_filters( 'list_cats', $cat_name, $category );

			

			//check a default has been set

			$checked = "";

			

			if($defaults)

			{

				$noselected = count($this->defaults);



				if(($noselected>0)&&(is_array($defaults)))

				{

					foreach($defaults as $defaultid)

					{

						if($defaultid==$cat_id)

						{

							$checked = ' checked="checked"';

						}

					}

				}

			}

			

			$link = "<label><input type='".$this->type."' name='".$sf_name."[]' value='".$cat_id."'".$checked." /> ".$cat_name;



			

			if ( !empty($show_count) )

				$link .= ' (' . intval($category->count) . ')';

				

			

			$link .= "</label>";

			

			if ( 'list' == $args['style'] ) {

				$output .= "\t<li";

				$class = 'cat-item cat-item-' . $category->term_id;

				if ( !empty($current_category) ) {

					$_current_category = get_term( $current_category, $category->taxonomy );

					if ( $category->term_id == $current_category )

						$class .=  ' current-cat';

					elseif ( $category->term_id == $_current_category->parent )

						$class .=  ' current-cat-parent';

				}

				$output .=  ' class="' . $class . '"';

				$output .= ">$link\n";

			} else {

				$output .= "\t$link<br />\n";

			}

		}

		else if($this->type=="multiselect")

		{

			extract($args);

			

			$cat_name = esc_attr( $category->name );

			$cat_id = esc_attr( $category->term_id );

			$cat_name = apply_filters( 'list_cats', $cat_name, $category );

			

			//check a default has been set

			$checked = "";

			if($defaults)

			{

				$noselected = count($this->defaults);



				if(($noselected>0)&&(is_array($defaults)))

				{

					foreach($defaults as $defaultid)

					{

						if($defaultid==$cat_id)

						{

							$checked = ' selected="selected"';

						}

					}

				}

			}

			

			

			/* Custom  depth calculations! :/ */

			if($category->parent == 0)

			{//then this has no parent so reset depth

				$this->multidepth = 0;

			}

			else if($category->parent == $this->multilastid)

			{

				$this->multidepth++;

				$this->multilastdepthchange = $this->multilastid;

			}

			else if($category->parent == $this->multilastdepthchange)

			{//then this is also a child with the same parent so don't change depth

				

			}

			else

			{//then this has a different parent so must be lower depth

				if($this->multidepth>0)

				{

					$this->multidepth--;

				}

			}

			

			$pad = str_repeat('&nbsp;', $this->multidepth * 3);

			$link = "<option class=\"level-".$this->multidepth."\" value='".$cat_id."'$checked />".$pad.$cat_name;



			if ( !empty($show_count) )

				$link .= '&nbsp;&nbsp;(' . intval($category->count) . ')';

				

			

			$link .= "</option>";

			$output .= "\t$link\n";

			

			

			$this->multilastid = $cat_id;

			

			

			/*

			$pad = str_repeat('&nbsp;', $depth * 3);



			$output .= "\t<option class=\"level-$depth\" value=\"".$category->term_id."\"";

			$cat_name = apply_filters('list_cats', $category->sf_name, $category);

			if ( $category->term_id == $args['selected'] )

				$output .= ' selected="selected"';

			$output .= '>';

			$output .= $pad.$cat_name;

			if ( $args['show_count'] )

				$output .= '&nbsp;&nbsp;('. $category->count .')';

			$output .= "</option>\n";*/

		}

		

		

	}

	

	function end_el( &$output, $page, $depth = 0, $args = array() )

	{

		if($this->type=="list")

		{

			if ( 'list' != $args['style'] )

				return;



			$output .= "</li>\n";

		}

		else if(($this->type=="checkbox")||($this->type=="radio"))

		{

			if ( 'list' != $args['style'] )

				return;



			$output .= "</li>\n";

		}

		else if($this->type=="multiselect")

		{

			if ( 'list' != $args['style'] )

				return;



			$output .= "</option>\n";

		}

	}

	

	function start_lvl( &$output, $depth = 0, $args = array() )

	{

	

		if($this->type=="list")

		{

			if ( 'list' != $args['style'] )

				return;



			$indent = str_repeat("\t", $depth);

			$output .= "$indent<ul class='children'>\n";

		}

		else if(($this->type=="checkbox")||($this->type=="radio"))

		{

			if ( 'list' != $args['style'] )

				return;



			$indent = str_repeat("\t", $depth);

			$output .= "$indent<ul class='children'>\n";

		}

		else if($this->type=="multiselect")

		{

			/*if ( 'list' != $args['style'] )

				return;



			$indent = str_repeat("\t", $depth);

			$output .= "$indent<ul class='children'>\n";*/

		}

	}

	

	function end_lvl( &$output, $depth = 0, $args = array() ) {

		if($this->type=="list")

		{

			if ( 'list' != $args['style'] )

				return;



			$indent = str_repeat("\t", $depth);

			$output .= "$indent</ul>\n";

		}

		else if(($this->type=="checkbox")||($this->type=="radio"))

		{

			if ( 'list' != $args['style'] )

				return;



			$indent = str_repeat("\t", $depth);

			$output .= "$indent</ul>\n";

		}

		else if($this->type=="multiselect")

		{

			

		}

	}

}



?>