IconViewHelper.php

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<?php
namespace TYPO3\CMS\Fluid\ViewHelpers\Be\Buttons;

/*                                                                        *
 * 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.                *
 *                                                                        *
 *                                                                        *
 * This script is distributed in the hope that it will be useful, but     *
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN-    *
 * TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser       *
 * General Public License for more details.                               *
 *                                                                        *
 * You should have received a copy of the GNU Lesser General Public       *
 * License along with the script.                                         *
 * If not, see http://www.gnu.org/licenses/lgpl.html                      *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

use TYPO3\CMS\Core\Imaging\Icon;
use TYPO3\CMS\Core\Imaging\IconFactory;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3\CMS\Fluid\Core\ViewHelper\Facets\CompilableInterface;
use TYPO3\CMS\Fluid\ViewHelpers\Be\AbstractBackendViewHelper;

class IconViewHelper extends AbstractBackendViewHelper implements CompilableInterface
{
    public function render($uri = '', $icon = 'actions-document-close', $title = '', $additionalAttributes = [])
    {
        return static::renderStatic(
            [
                'uri' => $uri,
                'icon' => $icon,
                'title' => $title,
                'additionalAttributes' => $additionalAttributes
            ],
            $this->buildRenderChildrenClosure(),
            $this->renderingContext
        );
    }

    public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext)
    {
        GeneralUtility::logDeprecatedFunction();
        $uri = $arguments['uri'];
        $icon = $arguments['icon'];
        $title = $arguments['title'];
        $additionalAttributes = $arguments['additionalAttributes'];
        $additionalTagAttributes = '';
        $iconFactory = GeneralUtility::makeInstance(IconFactory::class);
        $icon = '<span title="' . htmlspecialchars($title) . '">' . $iconFactory->getIcon($icon, Icon::SIZE_SMALL)->render() . '</span>';
        if (empty($uri)) {
            return $icon;
        }

        if ($additionalAttributes) {
            foreach ($additionalAttributes as $argumentKey => $argumentValue) {
                $additionalTagAttributes .= ' ' . $argumentKey . '="' . htmlspecialchars($argumentValue) . '"';
            }
        }
        return '<a href="' . $uri . '"' . $additionalTagAttributes . '>' . $icon . '</a>';
    }
}