class-gravityview-field-hidden.php

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<?php
/**
 * @file class-gravityview-field-hidden.php
 * @package GravityView
 * @subpackage includes\fields
 */

class GravityView_Field_Hidden extends GravityView_Field {

 var $name = 'hidden';

 var $is_searchable = true;

 var $search_operators = array( 'contains', 'is', 'isnot', 'starts_with', 'ends_with' );

 var $_gf_field_class_name = 'GF_Field_Hidden';

 var $group = 'standard';

 var $icon = 'dashicons-hidden';

 public function __construct() {
 $this->label = esc_html__( 'Hidden', 'gk-gravityview' );

 $this->edit_entry_add_hooks();

 parent::__construct();
 }

 /**
 * Add Edit Entry hooks
 *
 * @since 1.17
 *
 * @return void
 */
 private function edit_entry_add_hooks() {
 add_filter( 'gravityview/edit_entry/form_fields', array( $this, 'edit_entry_fix_hidden_fields' ) );
 }

 /**
 * Convert Hidden fields to be Text fields in Edit Entry
 *
 * @since 1.9.2
 * @since 1.17 Moved to GravityView_Field_Hidden class
 *
 * @param GF_Field[] $fields Array of fields to be shown on the Edit Entry screen
 *
 * @return GF_Field[] Array of fields, with any hidden fields replaced with text fields
 */
 function edit_entry_fix_hidden_fields( $fields ) {

 /** @type GF_Field $field */
 foreach( $fields as &$field ) {

 if ( 'hidden' === $field->type ) {

 /**
 * @filter `gravityview/edit_entry/reveal_hidden_field` Convert Hidden fields into Text fields on Edit Entry
 * @since 1.22.6
 * @since 2.7 Changed default value to `false` from `true`
 * @param bool $reveal_hidden_field True: Convert the hidden field to text; False: Leave hidden
 * @param GF_Field_Hidden $field The field in question
 */
 $reveal_hidden_field = apply_filters( 'gravityview/edit_entry/reveal_hidden_field', false, $field );

 if( ! $reveal_hidden_field ) {
 continue;
 }

 // Replace GF_Field_Hidden with GF_Field_Text, copying all the data from $field
 $field = new GF_Field_Text( $field );

 // Everything is copied from $field, so we need to manually set the type
 $field->type = 'text';
 }
 }

 return $fields;
 }

}

new GravityView_Field_Hidden;