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