CropViewHelper.php

Go to the documentation of this file.

<?php

namespace TYPO3\CMS\Fluid\ViewHelpers\Format;

/*
 * 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!
 */

use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;

class CropViewHelper extends AbstractViewHelper
{
    use CompileWithRenderStatic;

    protected $escapeOutput = false;

    public function initializeArguments()
    {
        $this->registerArgument('maxCharacters', 'int', 'Place where to truncate the string', true);
        $this->registerArgument('append', 'string', 'What to append, if truncation happened', false, '...');
        $this->registerArgument('respectWordBoundaries', 'bool', 'If TRUE and division is in the middle of a word, the remains of that word is removed.', false, true);
        $this->registerArgument('respectHtml', 'bool', 'If TRUE the cropped string will respect HTML tags and entities. Technically that means, that cropHTML() is called rather than crop()', false, true);
    }

    public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext)
    {
        $maxCharacters = $arguments['maxCharacters'];
        $append = $arguments['append'];
        $respectWordBoundaries = $arguments['respectWordBoundaries'];
        $respectHtml = $arguments['respectHtml'];

        $stringToTruncate = $renderChildrenClosure();

        // Even if we are in extbase/fluid context here, we're switching to a casual class of the framework here
        // that has no dependency injection and other stuff. Therefor it is ok to use makeInstance instead of
        // the ObjectManager here directly for additional performance
        // Additionally, it would be possible to retrieve the "current" content object via ConfigurationManager->getContentObject(),
        // but both crop() and cropHTML() are "nearly" static and do not depend on current content object settings, so
        // it is safe to use a fresh instance here directly.
        $contentObject = GeneralUtility::makeInstance(ContentObjectRenderer::class);
        if ($respectHtml) {
            $content = $contentObject->cropHTML($stringToTruncate, $maxCharacters . '|' . $append . '|' . $respectWordBoundaries);
        } else {
            $content = $contentObject->crop($stringToTruncate, $maxCharacters . '|' . $append . '|' . $respectWordBoundaries);
        }

        return $content;
    }
}