ProfilerExtension.php

<?php


/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Twig\Extension;

use Twig\Profiler\NodeVisitor\ProfilerNodeVisitor;
use Twig\Profiler\Profile;
class ProfilerExtension extends AbstractExtension {
    private $actives = [];
    public function __construct(Profile $profile) {
        $this->actives[] = $profile;
    }
    
    /**
     * @return void
     */
    public function enter(Profile $profile) {
        $this->actives[0]
            ->addProfile($profile);
        array_unshift($this->actives, $profile);
    }
    
    /**
     * @return void
     */
    public function leave(Profile $profile) {
        $profile->leave();
        array_shift($this->actives);
        if (1 === \count($this->actives)) {
            $this->actives[0]
                ->leave();
        }
    }
    public function getNodeVisitors() : array {
        return [
            new ProfilerNodeVisitor(static::class),
        ];
    }

}