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!                         *
 *                                                                        */
class IconViewHelper extends \TYPO3\CMS\Fluid\ViewHelpers\Be\AbstractBackendViewHelper {

    public function initializeArguments() {
        $this->registerArgument('additionalAttributes', 'array', 'Additional tag attributes. They will be added directly to the resulting HTML tag.', FALSE);
    }

    public function render($uri = '', $icon = 'actions-document-close', $title = '') {
        $additionalAttributes = '';
        if ($this->hasArgument('additionalAttributes') && is_array($this->arguments['additionalAttributes'])) {
            foreach ($this->arguments['additionalAttributes'] as $argumentKey => $argumentValue) {
                $additionalAttributes .= ' ' . $argumentKey . '="' . htmlspecialchars($argumentValue) . '"';
            }
        }
        $icon = \TYPO3\CMS\Backend\Utility\IconUtility::getSpriteIcon($icon, array('title' => $title));
        if (empty($uri)) {
            return $icon;
        } else {
            return '<a href="' . $uri . '"' . $additionalAttributes . '>' . $icon . '</a>';
        }
    }
}