TextfieldViewHelper.php

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

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

class TextfieldViewHelper extends AbstractFormFieldViewHelper
{
    protected $tagName = 'input';

    public function initializeArguments()
    {
        parent::initializeArguments();
        $this->registerTagAttribute('autofocus', 'string', 'Specifies that an 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->registerTagAttribute('pattern', 'string', 'HTML5 validation pattern');
        $this->registerArgument('errorClass', 'string', 'CSS class to set if there are errors for this view helper', false, 'f3-form-error');
        $this->registerUniversalTagAttributes();
        $this->registerArgument('required', 'bool', 'If the field is required or not', false, false);
        $this->registerArgument('type', 'string', 'The field type, e.g. "text", "email", "url" etc.', false, 'text');
    }

    public function render()
    {
        $required = $this->arguments['required'];
        $type = $this->arguments['type'];

        $name = $this->getName();
        $this->registerFieldNameForFormTokenGeneration($name);
        $this->setRespectSubmittedDataValue(true);

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

        $value = $this->getValueAttribute();

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

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

        $this->addAdditionalIdentityPropertiesIfNeeded();
        $this->setErrorClassAttribute();

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