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msd2/phpBB3/vendor/symfony/twig-bridge/TwigEngine.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Twig;
+
+use Symfony\Component\Templating\EngineInterface;
+use Symfony\Component\Templating\StreamingEngineInterface;
+use Symfony\Component\Templating\TemplateNameParserInterface;
+use Symfony\Component\Templating\TemplateReferenceInterface;
+use Twig\Environment;
+use Twig\Error\Error;
+use Twig\Error\LoaderError;
+use Twig\Loader\ExistsLoaderInterface;
+use Twig\Template;
+
+/**
+ * This engine knows how to render Twig templates.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class TwigEngine implements EngineInterface, StreamingEngineInterface
+{
+    protected $environment;
+    protected $parser;
+
+    public function __construct(Environment $environment, TemplateNameParserInterface $parser)
+    {
+        $this->environment = $environment;
+        $this->parser = $parser;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * It also supports Template as name parameter.
+     *
+     * @throws Error if something went wrong like a thrown exception while rendering the template
+     */
+    public function render($name, array $parameters = array())
+    {
+        return $this->load($name)->render($parameters);
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * It also supports Template as name parameter.
+     *
+     * @throws Error if something went wrong like a thrown exception while rendering the template
+     */
+    public function stream($name, array $parameters = array())
+    {
+        $this->load($name)->display($parameters);
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * It also supports Template as name parameter.
+     */
+    public function exists($name)
+    {
+        if ($name instanceof Template) {
+            return true;
+        }
+
+        $loader = $this->environment->getLoader();
+
+        if ($loader instanceof ExistsLoaderInterface || method_exists($loader, 'exists')) {
+            return $loader->exists((string) $name);
+        }
+
+        try {
+            // cast possible TemplateReferenceInterface to string because the
+            // EngineInterface supports them but LoaderInterface does not
+            $loader->getSourceContext((string) $name)->getCode();
+        } catch (LoaderError $e) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * It also supports Template as name parameter.
+     */
+    public function supports($name)
+    {
+        if ($name instanceof Template) {
+            return true;
+        }
+
+        $template = $this->parser->parse($name);
+
+        return 'twig' === $template->get('engine');
+    }
+
+    /**
+     * Loads the given template.
+     *
+     * @param string|TemplateReferenceInterface|Template $name A template name or an instance of
+     *                                                         TemplateReferenceInterface or Template
+     *
+     * @return Template
+     *
+     * @throws \InvalidArgumentException if the template does not exist
+     */
+    protected function load($name)
+    {
+        if ($name instanceof Template) {
+            return $name;
+        }
+
+        try {
+            return $this->environment->loadTemplate((string) $name);
+        } catch (LoaderError $e) {
+            throw new \InvalidArgumentException($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+}