1: <?php
 2: 
 3: /**
 4:  * This file is part of the Nette Framework (https://nette.org)
 5:  * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 6:  */
 7: 
 8: namespace Nette\Forms\Controls;
 9: 
10: use Nette;
11: 
12: 
13: /**
14:  * Hidden form control used to store a non-displayed value.
15:  */
16: class HiddenField extends BaseControl
17: {
18:     /** @var bool */
19:     private $persistValue;
20: 
21: 
22:     public function __construct($persistentValue = NULL)
23:     {
24:         parent::__construct();
25:         $this->control->type = 'hidden';
26:         if ($persistentValue !== NULL) {
27:             $this->unmonitor('Nette\Forms\Form');
28:             $this->persistValue = TRUE;
29:             $this->value = (string) $persistentValue;
30:         }
31:     }
32: 
33: 
34:     /**
35:      * Sets control's value.
36:      * @param  string
37:      * @return static
38:      * @internal
39:      */
40:     public function setValue($value)
41:     {
42:         if (!is_scalar($value) && $value !== NULL && !method_exists($value, '__toString')) {
43:             throw new Nette\InvalidArgumentException(sprintf("Value must be scalar or NULL, %s given in field '%s'.", gettype($value), $this->name));
44:         }
45:         if (!$this->persistValue) {
46:             $this->value = (string) $value;
47:         }
48:         return $this;
49:     }
50: 
51: 
52:     /**
53:      * Generates control's HTML element.
54:      * @return Nette\Utils\Html
55:      */
56:     public function getControl()
57:     {
58:         $this->setOption('rendered', TRUE);
59:         $el = clone $this->control;
60:         return $el->addAttributes(array(
61:             'name' => $this->getHtmlName(),
62:             'disabled' => $this->isDisabled(),
63:             'value' => $this->value,
64:         ));
65:     }
66: 
67: 
68:     /**
69:      * Bypasses label generation.
70:      * @return void
71:      */
72:     public function getLabel($caption = NULL)
73:     {
74:         return NULL;
75:     }
76: 
77: 
78:     /**
79:      * Adds error message to the list.
80:      * @param  string  error message
81:      * @return void
82:      */
83:     public function addError($message)
84:     {
85:         $this->getForm()->addError($message);
86:     }
87: 
88: }
89: