Renderer.php

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<?php

declare(strict_types=1);

namespace ILIAS\UI\Implementation\Component\Layout\Alignment;

use ILIAS\UI\Implementation\Render\AbstractComponentRenderer;
use ILIAS\UI\Renderer as RendererInterface;
use ILIAS\UI\Component;
use ILIAS\UI\Implementation\Render\ResourceRegistry;
use ILIAS\UI\Implementation\Render\Template;
use ILIAS\UI\Component\Layout\Alignment as I;

class Renderer extends AbstractComponentRenderer
{
    public function render(Component\Component $component, RendererInterface $default_renderer): string
    {
        switch(true) {
            case ($component instanceof Component\Layout\Alignment\Vertical):
                return $this->renderAlignment($component, $default_renderer);

            default:
                $this->cannotHandleComponent($component);
        }
    }

    protected function renderAlignment(
        I\Vertical $component,
        RendererInterface $default_renderer
    ): string {
        $tpl = $this->getTemplate('tpl.alignment.html', true, true);
        foreach ($component->getBlocks() as $idx => $block) {
            $tpl->setCurrentBlock('block');
            $tpl->setVariable('CONTENT', $default_renderer->render($block));
            $tpl->parseCurrentBlock();
        }
        $tpl->touchBlock('alignment_vertical');
        return $tpl->get();
    }
}