Draft of the typo3 fluid viewhelper to layout photos like in google plus gallery. Based on the for viewhelper

LayoutGalleryViewHelper.php

<?php

/* *
 * This script is backported from the FLOW3 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 Tx_Lister_ViewHelpers_LayoutGalleryViewHelper extends Tx_Fluid_Core_ViewHelper_AbstractViewHelper implements Tx_Fluid_Core_ViewHelper_Facets_CompilableInterface {

    /**
     * Iterates through elements of $each and renders child nodes
     *
     * @param array $each The array or Tx_Extbase_Persistence_ObjectStorage to iterated over
     * @param string $as The name of the iteration variable
     * @param string $key The name of the variable to store the current array key
     * @param boolean $reverse If enabled, the iterator will start with the last element and proceed reversely
     * @param string $iteration The name of the variable to store iteration information (index, cycle, isFirst, isLast, isEven, isOdd)
     * @param integer $containerWidth
     * @param integer $height
     * @param integer $gutter
     * @return string Rendered string
     * @api
     */
    public function render($each, $as, $key = '', $reverse = FALSE, $iteration = NULL, $containerWidth = 1165, $height = 233, $gutter = 6) {
        return self::renderStatic($this->arguments, $this->buildRenderChildrenClosure(), $this->renderingContext);
    }

    /**
     * @param array $arguments
     * @param Closure $renderChildrenClosure
     * @param Tx_Fluid_Core_Rendering_RenderingContextInterface $renderingContext
     * @return string
     */
    static public function renderStatic(array $arguments, Closure $renderChildrenClosure, Tx_Fluid_Core_Rendering_RenderingContextInterface $renderingContext) {
        $templateVariableContainer = $renderingContext->getTemplateVariableContainer();
        if ($arguments['each'] === NULL) {
            return '';
        }
        if (is_object($arguments['each']) && !$arguments['each'] instanceof Traversable) {
            throw new Tx_Fluid_Core_ViewHelper_Exception('ForViewHelper only supports arrays and objects implementing Traversable interface', 1248728393);
        }

        if ($arguments['reverse'] === TRUE) {
            // array_reverse only supports arrays
            if (is_object($arguments['each'])) {
                $arguments['each'] = iterator_to_array($arguments['each']);
            }
            $arguments['each'] = array_reverse($arguments['each']);
        }
        $iterationData = array(
            'index' => 0,
            'cycle' => 1,
            'total' => count($arguments['each'])
        );

        $output = '';
        
        $containerWidth = $arguments['containerWidth'];
        $height = 233;
        $gutter_width = 6;

        $width_so_far = 0;
        $index_begin = 0;
        $index_end = 0;
        foreach ($arguments['each'] as $keyValue => $singleElement) {
            $img_array = getimagesize("uploads/pics/$singleElement");
            $img_ration = $img_array[0] / $img_array[1];
            $width_arr_pre[$keyValue] = $img_ration * $height;

            $width_so_far += $img_ration * $height + $gutter_width;
            $index_end++;
            if ($width_so_far > $containerWidth) {
                $scale_factor =(  $containerWidth - $row_counter * $gutter_width) / ($width_so_far - $row_counter * $gutter_width);
                for ($i = $index_begin; $i < $index_end; $i++) {
                    $width_arr[$i] = floor($width_arr_pre[$i] * $scale_factor);
                }
                $index_begin = $index_end;
                $width_so_far = 0;
            }
        }
        foreach ($arguments['each'] as $keyValue => $singleElement) {
            $templateVariableContainer->add($arguments['as'], $singleElement);
            $templateVariableContainer->add('width_crop', $width_arr[$keyValue]);
            if ($arguments['key'] !== '') {
                $templateVariableContainer->add($arguments['key'], $keyValue);
            }
            if ($arguments['iteration'] !== NULL) {
                $iterationData['isFirst'] = $iterationData['cycle'] === 1;
                $iterationData['isLast'] = $iterationData['cycle'] === $iterationData['total'];
                $iterationData['isEven'] = $iterationData['cycle'] % 2 === 0;
                $iterationData['isOdd'] = !$iterationData['isEven'];
                $templateVariableContainer->add($arguments['iteration'], $iterationData);
                $iterationData['index']++;
                $iterationData['cycle']++;
            }
            $output .= $renderChildrenClosure();
            $templateVariableContainer->remove($arguments['as']);
            $templateVariableContainer->remove('width_crop');
            if ($arguments['key'] !== '') {
                $templateVariableContainer->remove($arguments['key']);
            }
            if ($arguments['iteration'] !== NULL) {
                $templateVariableContainer->remove($arguments['iteration']);
            }
        }
        return $output;
    }

}

?>