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:  * @author     David Grudl
17:  */
18: class HiddenField extends BaseControl
19: {
20:     /** @var bool */
21:     private $persistValue;
22: 
23: 
24:     public function __construct($persistentValue = NULL)
25:     {
26:         parent::__construct();
27:         $this->control->type = 'hidden';
28:         if ($persistentValue !== NULL) {
29:             $this->unmonitor('Nette\Forms\Form');
30:             $this->persistValue = TRUE;
31:             $this->value = (string) $persistentValue;
32:         }
33:     }
34: 
35: 
36:     /**
37:      * Sets control's value.
38:      * @param  string
39:      * @return self
40:      */
41:     public function setValue($value)
42:     {
43:         if (!is_scalar($value) && $value !== NULL && !method_exists($value, '__toString')) {
44:             throw new Nette\InvalidArgumentException(sprintf("Value must be scalar or NULL, %s given in field '%s'.", gettype($value), $this->name));
45:         }
46:         if (!$this->persistValue) {
47:             $this->value = (string) $value;
48:         }
49:         return $this;
50:     }
51: 
52: 
53:     /**
54:      * Generates control's HTML element.
55:      * @return Nette\Utils\Html
56:      */
57:     public function getControl()
58:     {
59:         $this->setOption('rendered', TRUE);
60:         $el = clone $this->control;
61:         return $el->addAttributes(array(
62:             'name' => $this->getHtmlName(),
63:             'id' => $this->getHtmlId(),
64:             'disabled' => $this->isDisabled(),
65:             'value' => $this->value,
66:         ));
67:     }
68: 
69: 
70:     /**
71:      * Bypasses label generation.
72:      * @return void
73:      */
74:     public function getLabel($caption = NULL)
75:     {
76:         return NULL;
77:     }
78: 
79: 
80:     /**
81:      * Adds error message to the list.
82:      * @param  string  error message
83:      * @return void
84:      */
85:     public function addError($message)
86:     {
87:         $this->getForm()->addError($message);
88:     }
89: 
90: }
91: