76 lines
1.9 KiB
PHP
76 lines
1.9 KiB
PHP
<?php
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/**
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* Select Tree Walker for cascading select fields.
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* @uses MASHSB_RWMB_Select_Walker
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*/
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class MASHSB_RWMB_Select_Tree_Walker
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{
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/**
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* Field data.
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* @var string
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*/
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public $field;
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/**
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* Field meta value.
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* @var array
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*/
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public $meta = array();
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function __construct( $db_fields, $field, $meta )
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{
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$this->db_fields = wp_parse_args( (array) $db_fields, array(
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'parent' => '',
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'id' => '',
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'label' => '',
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) );
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$this->field = $field;
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$this->meta = (array) $meta;
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}
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function walk( $options )
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{
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$parent = $this->db_fields['parent'];
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$children = array();
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foreach ( $options as $o )
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{
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$children[$o->$parent][] = $o;
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}
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$top_level = isset( $children[0] ) ? 0 : $options[0]->$parent;
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return $this->display_level( $children, $top_level, true );
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}
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function display_level( $options, $parent_id = 0, $active = false )
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{
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$id = $this->db_fields['id'];
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$field = $this->field;
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$meta = $this->meta;
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$walker = new MASHSB_RWMB_Select_Walker( $this->db_fields, $this->field, $this->meta );
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$field_class = MASHSB_RW_Meta_Box::get_class_name( $field );
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$attributes = call_user_func( array( $field_class, 'get_attributes' ), $field, $meta );
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$children = $options[$parent_id];
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$output = sprintf(
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'<div class="mashsb-rwmb-select-tree %s" data-parent-id="%s"><select %s>',
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$active ? '' : 'hidden',
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$parent_id,
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MASHSB_RWMB_Field::render_attributes( $attributes )
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);
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$output .= isset( $field['placeholder'] ) ? "<option value=''>{$field['placeholder']}</option>" : '<option></option>';
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$output .= $walker->walk( $children, - 1 );
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$output .= '</select>';
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foreach ( $children as $c )
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{
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if ( isset( $options[$c->$id] ) )
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{
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$output .= $this->display_level( $options, $c->$id, in_array( $c->$id, $meta ) && $active );
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}
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}
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$output .= '</div>';
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return $output;
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}
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}
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