TextfieldViewHelper.php

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<?php
namespace TYPO3\CMS\Fluid\ViewHelpers\Form;

/*                                                                        *
 * This script is backported from the TYPO3 Flow package "TYPO3.Fluid".   *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 *  of the License, or (at your option) any later version.                *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

class TextfieldViewHelper extends \TYPO3\CMS\Fluid\ViewHelpers\Form\AbstractFormFieldViewHelper {

    protected $tagName = 'input';

    public function initializeArguments() {
        parent::initializeArguments();
        $this->registerTagAttribute('autofocus', 'string', 'Specifies that a input should automatically get focus when the page loads');
        $this->registerTagAttribute('disabled', 'string', 'Specifies that the input element should be disabled when the page loads');
        $this->registerTagAttribute('maxlength', 'int', 'The maxlength attribute of the input field (will not be validated)');
        $this->registerTagAttribute('readonly', 'string', 'The readonly attribute of the input field');
        $this->registerTagAttribute('size', 'int', 'The size of the input field');
        $this->registerTagAttribute('placeholder', 'string', 'The placeholder of the textfield');
        $this->registerArgument('errorClass', 'string', 'CSS class to set if there are errors for this view helper', FALSE, 'f3-form-error');
        $this->registerUniversalTagAttributes();
    }

    public function render($required = NULL, $type = 'text') {
        $name = $this->getName();
        $this->registerFieldNameForFormTokenGeneration($name);

        $this->tag->addAttribute('type', $type);
        $this->tag->addAttribute('name', $name);

        $value = $this->getValue();

        if ($value !== NULL) {
            $this->tag->addAttribute('value', $value);
        }

        if ($required !== NULL) {
            $this->tag->addAttribute('required', 'required');
        }

        $this->setErrorClassAttribute();

        return $this->tag->render();
    }
}