Skip to content

Instantly share code, notes, and snippets.

@vertexvaar

vertexvaar/Test.html

Last active January 9, 2024 12:45
Show Gist options
  • Save vertexvaar/2ec9096a99a9e022a85442a311351c14 to your computer and use it in GitHub Desktop.
Save vertexvaar/2ec9096a99a9e022a85442a311351c14 to your computer and use it in GitHub Desktop.
Download ZIP
Backtracing ViewHelper
Raw
Test.html
<html data-namespace-typo3-fluid="true"
xmlns:f="http://typo3.org/ns/TYPO3/CMS/Fluid/ViewHelpers"
xmlns:n="http://typo3.org/ns/CoStack/NextConf/ViewHelpers"
>
<n:touched>
<h1>Here it goes</h1>
<n:touch/>
<n:touched>
<h2>Not rendered</h2>
</n:touched>
<n:touched>
<h2>Rendered</h2>
<n:touch/>
</n:touched>
<n:touched>
<h2>Not rendered again</h2>
</n:touched>
</n:touched>
</html>
Raw
TouchedViewHelper.php
<?php
declare(strict_types=1);
namespace CoStack\Backtracing\ViewHelpers;
use Closure;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;
use function hash;
use function random_bytes;
class TouchedViewHelper extends AbstractViewHelper
{
use CompileWithRenderStatic;
protected $escapeOutput = false;
protected $escapeChildren = false;
public static function renderStatic(
array $arguments,
Closure $renderChildrenClosure,
RenderingContextInterface $renderingContext
) {
$vhc = $renderingContext->getViewHelperVariableContainer();
$parentIdentity = $vhc->get(self::class, 'identity');
$identity = hash('sha1', random_bytes(16));
$vhc->add(self::class, 'identity', $identity);
$vhc->add(self::class, 'touched-' . $identity, false);
$content = $renderChildrenClosure();
$touched = $vhc->get(self::class, 'touched-' . $identity);
if (!$touched) {
$content = '';
}
$vhc->add(self::class, 'identity', $parentIdentity);
return $content;
}
}
Raw
TouchViewHelper.php
<?php
declare(strict_types=1);
namespace CoStack\Backtracing\ViewHelpers;
use Closure;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;
class TouchViewHelper extends AbstractViewHelper
{
use CompileWithRenderStatic;
public static function renderStatic(
array $arguments,
Closure $renderChildrenClosure,
RenderingContextInterface $renderingContext
): void {
$vhc = $renderingContext->getViewHelperVariableContainer();
$identity = $vhc->get(TouchedViewHelper::class, 'identity');
$vhc->add(TouchedViewHelper::class, 'touched-' . $identity, true);
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment