939 lines
25 KiB
PHP
939 lines
25 KiB
PHP
<?php
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/*
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* This file is part of Twig.
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*
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* (c) 2009 Fabien Potencier
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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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/**
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* Stores the Twig configuration.
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*
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* @package twig
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Twig_Environment
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{
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const VERSION = '1.2.0';
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protected $charset;
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protected $loader;
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protected $debug;
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protected $autoReload;
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protected $cache;
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protected $lexer;
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protected $parser;
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protected $compiler;
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protected $baseTemplateClass;
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protected $extensions;
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protected $parsers;
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protected $visitors;
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protected $filters;
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protected $tests;
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protected $functions;
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protected $globals;
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protected $runtimeInitialized;
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protected $loadedTemplates;
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protected $strictVariables;
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protected $unaryOperators;
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protected $binaryOperators;
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protected $templateClassPrefix = '__TwigTemplate_';
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protected $functionCallbacks;
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protected $filterCallbacks;
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/**
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* Constructor.
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*
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* Available options:
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*
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* * debug: When set to `true`, the generated templates have a __toString()
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* method that you can use to display the generated nodes (default to
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* false).
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*
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* * charset: The charset used by the templates (default to utf-8).
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*
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* * base_template_class: The base template class to use for generated
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* templates (default to Twig_Template).
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*
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* * cache: An absolute path where to store the compiled templates, or
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* false to disable compilation cache (default)
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*
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* * auto_reload: Whether to reload the template is the original source changed.
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* If you don't provide the auto_reload option, it will be
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* determined automatically base on the debug value.
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*
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* * strict_variables: Whether to ignore invalid variables in templates
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* (default to false).
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*
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* * autoescape: Whether to enable auto-escaping (default to true);
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*
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* * optimizations: A flag that indicates which optimizations to apply
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* (default to -1 which means that all optimizations are enabled;
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* set it to 0 to disable)
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*
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* @param Twig_LoaderInterface $loader A Twig_LoaderInterface instance
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* @param array $options An array of options
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*/
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public function __construct(Twig_LoaderInterface $loader = null, $options = array())
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{
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if (null !== $loader) {
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$this->setLoader($loader);
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}
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$options = array_merge(array(
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'debug' => false,
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'charset' => 'UTF-8',
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'base_template_class' => 'Twig_Template',
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'strict_variables' => false,
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'autoescape' => true,
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'cache' => false,
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'auto_reload' => null,
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'optimizations' => -1,
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), $options);
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$this->debug = (bool) $options['debug'];
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$this->charset = $options['charset'];
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$this->baseTemplateClass = $options['base_template_class'];
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$this->autoReload = null === $options['auto_reload'] ? $this->debug : (bool) $options['auto_reload'];
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$this->extensions = array(
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'core' => new Twig_Extension_Core(),
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'escaper' => new Twig_Extension_Escaper((bool) $options['autoescape']),
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'optimizer' => new Twig_Extension_Optimizer($options['optimizations']),
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);
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$this->strictVariables = (bool) $options['strict_variables'];
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$this->runtimeInitialized = false;
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$this->setCache($options['cache']);
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$this->functionCallbacks = array();
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$this->filterCallbacks = array();
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}
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/**
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* Gets the base template class for compiled templates.
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*
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* @return string The base template class name
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*/
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public function getBaseTemplateClass()
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{
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return $this->baseTemplateClass;
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}
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/**
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* Sets the base template class for compiled templates.
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*
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* @param string $class The base template class name
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*/
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public function setBaseTemplateClass($class)
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{
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$this->baseTemplateClass = $class;
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}
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/**
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* Enables debugging mode.
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*/
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public function enableDebug()
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{
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$this->debug = true;
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}
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/**
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* Disables debugging mode.
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*/
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public function disableDebug()
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{
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$this->debug = false;
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}
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/**
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* Checks if debug mode is enabled.
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*
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* @return Boolean true if debug mode is enabled, false otherwise
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*/
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public function isDebug()
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{
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return $this->debug;
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}
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/**
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* Enables the auto_reload option.
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*/
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public function enableAutoReload()
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{
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$this->autoReload = true;
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}
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/**
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* Disables the auto_reload option.
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*/
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public function disableAutoReload()
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{
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$this->autoReload = false;
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}
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/**
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* Checks if the auto_reload option is enabled.
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*
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* @return Boolean true if auto_reload is enabled, false otherwise
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*/
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public function isAutoReload()
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{
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return $this->autoReload;
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}
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/**
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* Enables the strict_variables option.
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*/
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public function enableStrictVariables()
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{
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$this->strictVariables = true;
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}
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/**
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* Disables the strict_variables option.
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*/
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public function disableStrictVariables()
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{
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$this->strictVariables = false;
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}
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/**
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* Checks if the strict_variables option is enabled.
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*
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* @return Boolean true if strict_variables is enabled, false otherwise
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*/
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public function isStrictVariables()
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{
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return $this->strictVariables;
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}
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/**
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* Gets the cache directory or false if cache is disabled.
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*
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* @return string|false
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*/
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public function getCache()
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{
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return $this->cache;
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}
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/**
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* Sets the cache directory or false if cache is disabled.
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*
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* @param string|false $cache The absolute path to the compiled templates,
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* or false to disable cache
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*/
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public function setCache($cache)
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{
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$this->cache = $cache ? $cache : false;
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}
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/**
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* Gets the cache filename for a given template.
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*
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* @param string $name The template name
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*
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* @return string The cache file name
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*/
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public function getCacheFilename($name)
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{
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if (false === $this->cache) {
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return false;
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}
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$class = substr($this->getTemplateClass($name), strlen($this->templateClassPrefix));
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return $this->getCache().'/'.substr($class, 0, 2).'/'.substr($class, 2, 2).'/'.substr($class, 4).'.php';
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}
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/**
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* Gets the template class associated with the given string.
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*
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* @param string $name The name for which to calculate the template class name
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*
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* @return string The template class name
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*/
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public function getTemplateClass($name)
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{
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return $this->templateClassPrefix.md5($this->loader->getCacheKey($name));
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}
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/**
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* Gets the template class prefix.
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*
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* @return string The template class prefix
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*/
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public function getTemplateClassPrefix()
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{
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return $this->templateClassPrefix;
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}
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/**
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* Renders a template.
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*
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* @param string $name The template name
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* @param array $context An array of parameters to pass to the template
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*
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* @return string The rendered template
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*/
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public function render($name, array $context = array())
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{
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return $this->loadTemplate($name)->render($context);
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}
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/**
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* Loads a template by name.
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*
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* @param string $name The template name
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*
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* @return Twig_TemplateInterface A template instance representing the given template name
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*/
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public function loadTemplate($name)
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{
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$cls = $this->getTemplateClass($name);
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if (isset($this->loadedTemplates[$cls])) {
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return $this->loadedTemplates[$cls];
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}
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if (!class_exists($cls, false)) {
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if (false === $cache = $this->getCacheFilename($name)) {
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eval('?>'.$this->compileSource($this->loader->getSource($name), $name));
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} else {
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if (!is_file($cache) || ($this->isAutoReload() && !$this->loader->isFresh($name, filemtime($cache)))) {
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$this->writeCacheFile($cache, $this->compileSource($this->loader->getSource($name), $name));
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}
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require_once $cache;
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}
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}
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if (!$this->runtimeInitialized) {
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$this->initRuntime();
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}
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return $this->loadedTemplates[$cls] = new $cls($this);
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}
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public function resolveTemplate($names)
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{
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if (!is_array($names)) {
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$names = array($names);
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}
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foreach ($names as $name) {
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if ($name instanceof Twig_Template) {
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return $name;
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}
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try {
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return $this->loadTemplate($name);
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} catch (Twig_Error_Loader $e) {
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}
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}
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if (1 === count($names)) {
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throw $e;
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}
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throw new Twig_Error_Loader(sprintf('Unable to find one of the following templates: "%s".', implode('", "', $names)));
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}
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/**
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* Clears the internal template cache.
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*/
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public function clearTemplateCache()
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{
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$this->loadedTemplates = array();
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}
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/**
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* Clears the template cache files on the filesystem.
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*/
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public function clearCacheFiles()
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{
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if (false === $this->cache) {
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return;
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}
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foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($this->cache), RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
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if ($file->isFile()) {
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@unlink($file->getPathname());
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}
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}
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}
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/**
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* Gets the Lexer instance.
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*
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* @return Twig_LexerInterface A Twig_LexerInterface instance
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*/
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public function getLexer()
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{
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if (null === $this->lexer) {
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$this->lexer = new Twig_Lexer($this);
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}
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return $this->lexer;
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}
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/**
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* Sets the Lexer instance.
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*
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* @param Twig_LexerInterface A Twig_LexerInterface instance
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*/
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public function setLexer(Twig_LexerInterface $lexer)
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{
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$this->lexer = $lexer;
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}
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/**
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* Tokenizes a source code.
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*
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* @param string $source The template source code
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* @param string $name The template name
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*
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* @return Twig_TokenStream A Twig_TokenStream instance
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*/
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public function tokenize($source, $name = null)
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{
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return $this->getLexer()->tokenize($source, $name);
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}
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/**
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* Gets the Parser instance.
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*
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* @return Twig_ParserInterface A Twig_ParserInterface instance
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*/
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public function getParser()
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{
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if (null === $this->parser) {
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$this->parser = new Twig_Parser($this);
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}
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return $this->parser;
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}
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/**
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* Sets the Parser instance.
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*
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* @param Twig_ParserInterface A Twig_ParserInterface instance
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*/
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public function setParser(Twig_ParserInterface $parser)
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{
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$this->parser = $parser;
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}
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/**
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* Parses a token stream.
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*
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* @param Twig_TokenStream $tokens A Twig_TokenStream instance
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*
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* @return Twig_Node_Module A Node tree
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*/
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public function parse(Twig_TokenStream $tokens)
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{
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return $this->getParser()->parse($tokens);
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}
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/**
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* Gets the Compiler instance.
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*
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* @return Twig_CompilerInterface A Twig_CompilerInterface instance
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*/
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public function getCompiler()
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{
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if (null === $this->compiler) {
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$this->compiler = new Twig_Compiler($this);
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}
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return $this->compiler;
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}
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/**
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* Sets the Compiler instance.
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*
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* @param Twig_CompilerInterface $compiler A Twig_CompilerInterface instance
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*/
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public function setCompiler(Twig_CompilerInterface $compiler)
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{
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$this->compiler = $compiler;
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}
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/**
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* Compiles a Node.
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*
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* @param Twig_NodeInterface $node A Twig_NodeInterface instance
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*
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* @return string The compiled PHP source code
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*/
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public function compile(Twig_NodeInterface $node)
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{
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return $this->getCompiler()->compile($node)->getSource();
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}
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/**
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* Compiles a template source code.
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*
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* @param string $source The template source code
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* @param string $name The template name
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*
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* @return string The compiled PHP source code
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*/
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public function compileSource($source, $name = null)
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{
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try {
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return $this->compile($this->parse($this->tokenize($source, $name)));
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} catch (Twig_Error $e) {
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$e->setTemplateFile($name);
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throw $e;
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} catch (Exception $e) {
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throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the compilation of a template ("%s").', $e->getMessage()), -1, $name, $e);
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}
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}
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/**
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* Sets the Loader instance.
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*
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* @param Twig_LoaderInterface $loader A Twig_LoaderInterface instance
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*/
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public function setLoader(Twig_LoaderInterface $loader)
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{
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$this->loader = $loader;
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}
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/**
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* Gets the Loader instance.
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*
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* @return Twig_LoaderInterface A Twig_LoaderInterface instance
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*/
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public function getLoader()
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{
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return $this->loader;
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}
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/**
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* Sets the default template charset.
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*
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* @param string $charset The default charset
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*/
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public function setCharset($charset)
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{
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$this->charset = $charset;
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}
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/**
|
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* Gets the default template charset.
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*
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* @return string The default charset
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*/
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public function getCharset()
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{
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return $this->charset;
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}
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/**
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* Initializes the runtime environment.
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*/
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public function initRuntime()
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{
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$this->runtimeInitialized = true;
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foreach ($this->getExtensions() as $extension) {
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$extension->initRuntime($this);
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}
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}
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|
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/**
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* Returns true if the given extension is registered.
|
|
*
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* @param string $name The extension name
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*
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* @return Boolean Whether the extension is registered or not
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*/
|
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public function hasExtension($name)
|
|
{
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return isset($this->extensions[$name]);
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}
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|
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/**
|
|
* Gets an extension by name.
|
|
*
|
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* @param string $name The extension name
|
|
*
|
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* @return Twig_ExtensionInterface A Twig_ExtensionInterface instance
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*/
|
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public function getExtension($name)
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{
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if (!isset($this->extensions[$name])) {
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throw new Twig_Error_Runtime(sprintf('The "%s" extension is not enabled.', $name));
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}
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return $this->extensions[$name];
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}
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|
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/**
|
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* Registers an extension.
|
|
*
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* @param Twig_ExtensionInterface $extension A Twig_ExtensionInterface instance
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*/
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public function addExtension(Twig_ExtensionInterface $extension)
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{
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$this->extensions[$extension->getName()] = $extension;
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}
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/**
|
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* Removes an extension by name.
|
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*
|
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* @param string $name The extension name
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*/
|
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public function removeExtension($name)
|
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{
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unset($this->extensions[$name]);
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}
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|
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/**
|
|
* Registers an array of extensions.
|
|
*
|
|
* @param array $extensions An array of extensions
|
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*/
|
|
public function setExtensions(array $extensions)
|
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{
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foreach ($extensions as $extension) {
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$this->addExtension($extension);
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}
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}
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|
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/**
|
|
* Returns all registered extensions.
|
|
*
|
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* @return array An array of extensions
|
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*/
|
|
public function getExtensions()
|
|
{
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return $this->extensions;
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}
|
|
|
|
/**
|
|
* Registers a Token Parser.
|
|
*
|
|
* @param Twig_TokenParserInterface $parser A Twig_TokenParserInterface instance
|
|
*/
|
|
public function addTokenParser(Twig_TokenParserInterface $parser)
|
|
{
|
|
if (null === $this->parsers) {
|
|
$this->getTokenParsers();
|
|
}
|
|
|
|
$this->parsers->addTokenParser($parser);
|
|
}
|
|
|
|
/**
|
|
* Gets the registered Token Parsers.
|
|
*
|
|
* @return Twig_TokenParserInterface[] An array of Twig_TokenParserInterface instances
|
|
*/
|
|
public function getTokenParsers()
|
|
{
|
|
if (null === $this->parsers) {
|
|
$this->parsers = new Twig_TokenParserBroker;
|
|
foreach ($this->getExtensions() as $extension) {
|
|
$parsers = $extension->getTokenParsers();
|
|
foreach($parsers as $parser) {
|
|
if ($parser instanceof Twig_TokenParserInterface) {
|
|
$this->parsers->addTokenParser($parser);
|
|
} else if ($parser instanceof Twig_TokenParserBrokerInterface) {
|
|
$this->parsers->addTokenParserBroker($parser);
|
|
} else {
|
|
throw new Twig_Error_Runtime('getTokenParsers() must return an array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances');
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return $this->parsers;
|
|
}
|
|
|
|
/**
|
|
* Registers a Node Visitor.
|
|
*
|
|
* @param Twig_NodeVisitorInterface $visitor A Twig_NodeVisitorInterface instance
|
|
*/
|
|
public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
|
|
{
|
|
if (null === $this->visitors) {
|
|
$this->getNodeVisitors();
|
|
}
|
|
|
|
$this->visitors[] = $visitor;
|
|
}
|
|
|
|
/**
|
|
* Gets the registered Node Visitors.
|
|
*
|
|
* @return Twig_NodeVisitorInterface[] An array of Twig_NodeVisitorInterface instances
|
|
*/
|
|
public function getNodeVisitors()
|
|
{
|
|
if (null === $this->visitors) {
|
|
$this->visitors = array();
|
|
foreach ($this->getExtensions() as $extension) {
|
|
$this->visitors = array_merge($this->visitors, $extension->getNodeVisitors());
|
|
}
|
|
}
|
|
|
|
return $this->visitors;
|
|
}
|
|
|
|
/**
|
|
* Registers a Filter.
|
|
*
|
|
* @param string $name The filter name
|
|
* @param Twig_FilterInterface $visitor A Twig_FilterInterface instance
|
|
*/
|
|
public function addFilter($name, Twig_FilterInterface $filter)
|
|
{
|
|
if (null === $this->filters) {
|
|
$this->loadFilters();
|
|
}
|
|
|
|
$this->filters[$name] = $filter;
|
|
}
|
|
|
|
/**
|
|
* Get a filter by name.
|
|
*
|
|
* Subclasses may override this method and load filters differently;
|
|
* so no list of filters is available.
|
|
*
|
|
* @param string $name The filter name
|
|
*
|
|
* @return Twig_Filter|false A Twig_Filter instance or false if the filter does not exists
|
|
*/
|
|
public function getFilter($name)
|
|
{
|
|
if (null === $this->filters) {
|
|
$this->loadFilters();
|
|
}
|
|
|
|
if (isset($this->filters[$name])) {
|
|
return $this->filters[$name];
|
|
}
|
|
|
|
foreach ($this->filterCallbacks as $callback) {
|
|
if (false !== $filter = call_user_func($callback, $name)) {
|
|
return $filter;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public function registerUndefinedFilterCallback($callable)
|
|
{
|
|
$this->filterCallbacks[] = $callable;
|
|
}
|
|
|
|
/**
|
|
* Gets the registered Filters.
|
|
*
|
|
* @return Twig_FilterInterface[] An array of Twig_FilterInterface instances
|
|
*/
|
|
protected function loadFilters()
|
|
{
|
|
$this->filters = array();
|
|
foreach ($this->getExtensions() as $extension) {
|
|
$this->filters = array_merge($this->filters, $extension->getFilters());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Registers a Test.
|
|
*
|
|
* @param string $name The test name
|
|
* @param Twig_TestInterface $visitor A Twig_TestInterface instance
|
|
*/
|
|
public function addTest($name, Twig_TestInterface $test)
|
|
{
|
|
if (null === $this->tests) {
|
|
$this->getTests();
|
|
}
|
|
|
|
$this->tests[$name] = $test;
|
|
}
|
|
|
|
/**
|
|
* Gets the registered Tests.
|
|
*
|
|
* @return Twig_TestInterface[] An array of Twig_TestInterface instances
|
|
*/
|
|
public function getTests()
|
|
{
|
|
if (null === $this->tests) {
|
|
$this->tests = array();
|
|
foreach ($this->getExtensions() as $extension) {
|
|
$this->tests = array_merge($this->tests, $extension->getTests());
|
|
}
|
|
}
|
|
|
|
return $this->tests;
|
|
}
|
|
|
|
/**
|
|
* Registers a Function.
|
|
*
|
|
* @param string $name The function name
|
|
* @param Twig_FunctionInterface $function A Twig_FunctionInterface instance
|
|
*/
|
|
public function addFunction($name, Twig_FunctionInterface $function)
|
|
{
|
|
if (null === $this->functions) {
|
|
$this->loadFunctions();
|
|
}
|
|
|
|
$this->functions[$name] = $function;
|
|
}
|
|
|
|
/**
|
|
* Get a function by name.
|
|
*
|
|
* Subclasses may override this method and load functions differently;
|
|
* so no list of functions is available.
|
|
*
|
|
* @param string $name function name
|
|
*
|
|
* @return Twig_Function|false A Twig_Function instance or false if the function does not exists
|
|
*/
|
|
public function getFunction($name)
|
|
{
|
|
if (null === $this->functions) {
|
|
$this->loadFunctions();
|
|
}
|
|
|
|
if (isset($this->functions[$name])) {
|
|
return $this->functions[$name];
|
|
}
|
|
|
|
foreach ($this->functionCallbacks as $callback) {
|
|
if (false !== $function = call_user_func($callback, $name)) {
|
|
return $function;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public function registerUndefinedFunctionCallback($callable)
|
|
{
|
|
$this->functionCallbacks[] = $callable;
|
|
}
|
|
|
|
protected function loadFunctions()
|
|
{
|
|
$this->functions = array();
|
|
foreach ($this->getExtensions() as $extension) {
|
|
$this->functions = array_merge($this->functions, $extension->getFunctions());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Registers a Global.
|
|
*
|
|
* @param string $name The global name
|
|
* @param mixed $value The global value
|
|
*/
|
|
public function addGlobal($name, $value)
|
|
{
|
|
if (null === $this->globals) {
|
|
$this->getGlobals();
|
|
}
|
|
|
|
$this->globals[$name] = $value;
|
|
}
|
|
|
|
/**
|
|
* Gets the registered Globals.
|
|
*
|
|
* @return array An array of globals
|
|
*/
|
|
public function getGlobals()
|
|
{
|
|
if (null === $this->globals) {
|
|
$this->globals = array();
|
|
foreach ($this->getExtensions() as $extension) {
|
|
$this->globals = array_merge($this->globals, $extension->getGlobals());
|
|
}
|
|
}
|
|
|
|
return $this->globals;
|
|
}
|
|
|
|
/**
|
|
* Gets the registered unary Operators.
|
|
*
|
|
* @return array An array of unary operators
|
|
*/
|
|
public function getUnaryOperators()
|
|
{
|
|
if (null === $this->unaryOperators) {
|
|
$this->initOperators();
|
|
}
|
|
|
|
return $this->unaryOperators;
|
|
}
|
|
|
|
/**
|
|
* Gets the registered binary Operators.
|
|
*
|
|
* @return array An array of binary operators
|
|
*/
|
|
public function getBinaryOperators()
|
|
{
|
|
if (null === $this->binaryOperators) {
|
|
$this->initOperators();
|
|
}
|
|
|
|
return $this->binaryOperators;
|
|
}
|
|
|
|
protected function initOperators()
|
|
{
|
|
$this->unaryOperators = array();
|
|
$this->binaryOperators = array();
|
|
foreach ($this->getExtensions() as $extension) {
|
|
$operators = $extension->getOperators();
|
|
|
|
if (!$operators) {
|
|
continue;
|
|
}
|
|
|
|
if (2 !== count($operators)) {
|
|
throw new InvalidArgumentException(sprintf('"%s::getOperators()" does not return a valid operators array.', get_class($extension)));
|
|
}
|
|
|
|
$this->unaryOperators = array_merge($this->unaryOperators, $operators[0]);
|
|
$this->binaryOperators = array_merge($this->binaryOperators, $operators[1]);
|
|
}
|
|
}
|
|
|
|
protected function writeCacheFile($file, $content)
|
|
{
|
|
if (!is_dir(dirname($file))) {
|
|
mkdir(dirname($file), 0777, true);
|
|
}
|
|
|
|
$tmpFile = tempnam(dirname($file), basename($file));
|
|
if (false !== @file_put_contents($tmpFile, $content)) {
|
|
// rename does not work on Win32 before 5.2.6
|
|
if (@rename($tmpFile, $file) || (@copy($tmpFile, $file) && unlink($tmpFile))) {
|
|
chmod($file, 0644);
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
throw new Twig_Error_Runtime(sprintf('Failed to write cache file "%s".', $file));
|
|
}
|
|
}
|