127 lines
3.4 KiB
PHP
127 lines
3.4 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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/**
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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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* Renders a template.
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*
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* @param mixed $name A template name
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* @param array $parameters An array of parameters to pass to the template
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*
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* @return string The evaluated template as a string
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*
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* @throws \InvalidArgumentException if the template does not exist
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* @throws \RuntimeException if the template cannot be rendered
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*/
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public function render($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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* Streams a template.
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*
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* @param mixed $name A template name or a TemplateReferenceInterface instance
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* @param array $parameters An array of parameters to pass to the template
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*
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* @throws \RuntimeException if the template cannot be rendered
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*/
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public function stream($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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* Returns true if the template exists.
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*
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* @param mixed $name A template name
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*
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* @return Boolean true if the template exists, false otherwise
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*/
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public function exists($name)
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{
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try {
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$this->load($name);
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} catch (\InvalidArgumentException $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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* Returns true if this class is able to render the given template.
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*
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* @param string $name A template name
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*
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* @return Boolean True if this class supports the given resource, false otherwise
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*/
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public function supports($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 mixed $name A template name or an instance of Twig_Template
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*
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* @return \Twig_TemplateInterface A \Twig_TemplateInterface instance
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*
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* @throws \InvalidArgumentException if the template does not exist
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*/
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protected function load($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 $this->environment->loadTemplate($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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