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708 lines
24 KiB
708 lines
24 KiB
<?php
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/*
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* This file is part of Twig.
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*
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* (c) Fabien Potencier
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* (c) Armin Ronacher
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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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* Default base class for compiled templates.
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*
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* This class is an implementation detail of how template compilation currently
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* works, which might change. It should never be used directly. Use $twig->load()
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* instead, which returns an instance of Twig_TemplateWrapper.
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*
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* @author Fabien Potencier <[email protected]>
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*
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* @internal
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*/
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abstract class Twig_Template implements Twig_TemplateInterface
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{
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/**
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* @internal
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*/
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protected static $cache = array();
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protected $parent;
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protected $parents = array();
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protected $env;
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protected $blocks = array();
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protected $traits = array();
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public function __construct(Twig_Environment $env)
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{
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$this->env = $env;
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}
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/**
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* @internal this method will be removed in 2.0 and is only used internally to provide an upgrade path from 1.x to 2.0
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*/
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public function __toString()
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{
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return $this->getTemplateName();
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}
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/**
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* Returns the template name.
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*
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* @return string The template name
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*/
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abstract public function getTemplateName();
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/**
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* Returns debug information about the template.
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*
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* @return array Debug information
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*
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* @internal
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*/
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public function getDebugInfo()
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{
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return array();
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}
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/**
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* Returns the template source code.
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*
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* @return string The template source code
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*
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* @deprecated since 1.27 (to be removed in 2.0). Use getSourceContext() instead
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*/
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public function getSource()
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{
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@trigger_error('The '.__METHOD__.' method is deprecated since version 1.27 and will be removed in 2.0. Use getSourceContext() instead.', E_USER_DEPRECATED);
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return '';
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}
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/**
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* Returns information about the original template source code.
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*
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* @return Twig_Source
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*/
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public function getSourceContext()
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{
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return new Twig_Source('', $this->getTemplateName());
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}
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/**
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* @deprecated since 1.20 (to be removed in 2.0)
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*/
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public function getEnvironment()
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{
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@trigger_error('The '.__METHOD__.' method is deprecated since version 1.20 and will be removed in 2.0.', E_USER_DEPRECATED);
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return $this->env;
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}
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/**
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* Returns the parent template.
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*
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* This method is for internal use only and should never be called
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* directly.
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*
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* @param array $context
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*
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* @return Twig_TemplateInterface|false The parent template or false if there is no parent
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*
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* @internal
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*/
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public function getParent(array $context)
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{
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if (null !== $this->parent) {
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return $this->parent;
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}
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try {
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$parent = $this->doGetParent($context);
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if (false === $parent) {
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return false;
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}
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if ($parent instanceof self) {
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return $this->parents[$parent->getTemplateName()] = $parent;
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}
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if (!isset($this->parents[$parent])) {
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$this->parents[$parent] = $this->loadTemplate($parent);
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}
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} catch (Twig_Error_Loader $e) {
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$e->setSourceContext(null);
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$e->guess();
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throw $e;
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}
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return $this->parents[$parent];
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}
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protected function doGetParent(array $context)
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{
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return false;
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}
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public function isTraitable()
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{
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return true;
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}
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/**
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* Displays a parent block.
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*
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* This method is for internal use only and should never be called
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* directly.
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*
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* @param string $name The block name to display from the parent
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* @param array $context The context
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* @param array $blocks The current set of blocks
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*
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* @internal
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*/
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public function displayParentBlock($name, array $context, array $blocks = array())
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{
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$name = (string) $name;
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if (isset($this->traits[$name])) {
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$this->traits[$name][0]->displayBlock($name, $context, $blocks, false);
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} elseif (false !== $parent = $this->getParent($context)) {
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$parent->displayBlock($name, $context, $blocks, false);
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} else {
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throw new Twig_Error_Runtime(sprintf('The template has no parent and no traits defining the "%s" block.', $name), -1, $this->getSourceContext());
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}
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}
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/**
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* Displays a block.
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*
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* This method is for internal use only and should never be called
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* directly.
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*
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* @param string $name The block name to display
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* @param array $context The context
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* @param array $blocks The current set of blocks
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* @param bool $useBlocks Whether to use the current set of blocks
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*
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* @internal
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*/
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public function displayBlock($name, array $context, array $blocks = array(), $useBlocks = true)
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{
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$name = (string) $name;
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if ($useBlocks && isset($blocks[$name])) {
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$template = $blocks[$name][0];
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$block = $blocks[$name][1];
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} elseif (isset($this->blocks[$name])) {
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$template = $this->blocks[$name][0];
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$block = $this->blocks[$name][1];
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} else {
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$template = null;
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$block = null;
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}
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// avoid RCEs when sandbox is enabled
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if (null !== $template && !$template instanceof self) {
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throw new LogicException('A block must be a method on a Twig_Template instance.');
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}
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if (null !== $template) {
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try {
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$template->$block($context, $blocks);
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} catch (Twig_Error $e) {
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if (!$e->getSourceContext()) {
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$e->setSourceContext($template->getSourceContext());
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}
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// this is mostly useful for Twig_Error_Loader exceptions
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// see Twig_Error_Loader
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if (false === $e->getTemplateLine()) {
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$e->setTemplateLine(-1);
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$e->guess();
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}
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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 rendering of a template ("%s").', $e->getMessage()), -1, $template->getSourceContext(), $e);
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}
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} elseif (false !== $parent = $this->getParent($context)) {
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$parent->displayBlock($name, $context, array_merge($this->blocks, $blocks), false);
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} else {
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@trigger_error(sprintf('Silent display of undefined block "%s" in template "%s" is deprecated since version 1.29 and will throw an exception in 2.0. Use the "block(\'%s\') is defined" expression to test for block existence.', $name, $this->getTemplateName(), $name), E_USER_DEPRECATED);
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}
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}
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/**
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* Renders a parent block.
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*
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* This method is for internal use only and should never be called
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* directly.
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*
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* @param string $name The block name to render from the parent
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* @param array $context The context
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* @param array $blocks The current set of blocks
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*
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* @return string The rendered block
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*
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* @internal
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*/
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public function renderParentBlock($name, array $context, array $blocks = array())
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{
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ob_start();
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$this->displayParentBlock($name, $context, $blocks);
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return ob_get_clean();
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}
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/**
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* Renders a block.
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*
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* This method is for internal use only and should never be called
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* directly.
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*
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* @param string $name The block name to render
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* @param array $context The context
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* @param array $blocks The current set of blocks
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* @param bool $useBlocks Whether to use the current set of blocks
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*
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* @return string The rendered block
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*
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* @internal
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*/
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public function renderBlock($name, array $context, array $blocks = array(), $useBlocks = true)
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{
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ob_start();
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$this->displayBlock($name, $context, $blocks, $useBlocks);
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return ob_get_clean();
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}
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/**
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* Returns whether a block exists or not in the current context of the template.
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*
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* This method checks blocks defined in the current template
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* or defined in "used" traits or defined in parent templates.
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*
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* @param string $name The block name
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* @param array $context The context
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* @param array $blocks The current set of blocks
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*
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* @return bool true if the block exists, false otherwise
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*
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* @internal
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*/
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public function hasBlock($name, array $context = null, array $blocks = array())
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{
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if (null === $context) {
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@trigger_error('The '.__METHOD__.' method is internal and should never be called; calling it directly is deprecated since version 1.28 and won\'t be possible anymore in 2.0.', E_USER_DEPRECATED);
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return isset($this->blocks[(string) $name]);
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}
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if (isset($blocks[$name])) {
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return $blocks[$name][0] instanceof self;
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}
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if (isset($this->blocks[$name])) {
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return true;
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}
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if (false !== $parent = $this->getParent($context)) {
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return $parent->hasBlock($name, $context);
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}
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return false;
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}
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/**
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* Returns all block names in the current context of the template.
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*
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* This method checks blocks defined in the current template
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* or defined in "used" traits or defined in parent templates.
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*
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* @param array $context The context
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* @param array $blocks The current set of blocks
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*
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* @return array An array of block names
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*
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* @internal
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*/
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public function getBlockNames(array $context = null, array $blocks = array())
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{
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if (null === $context) {
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@trigger_error('The '.__METHOD__.' method is internal and should never be called; calling it directly is deprecated since version 1.28 and won\'t be possible anymore in 2.0.', E_USER_DEPRECATED);
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return array_keys($this->blocks);
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}
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$names = array_merge(array_keys($blocks), array_keys($this->blocks));
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if (false !== $parent = $this->getParent($context)) {
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$names = array_merge($names, $parent->getBlockNames($context));
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}
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return array_unique($names);
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}
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protected function loadTemplate($template, $templateName = null, $line = null, $index = null)
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{
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try {
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if (is_array($template)) {
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return $this->env->resolveTemplate($template);
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}
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if ($template instanceof self) {
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return $template;
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}
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if ($template instanceof Twig_TemplateWrapper) {
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return $template;
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}
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return $this->env->loadTemplate($template, $index);
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} catch (Twig_Error $e) {
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if (!$e->getSourceContext()) {
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$e->setSourceContext($templateName ? new Twig_Source('', $templateName) : $this->getSourceContext());
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}
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if ($e->getTemplateLine()) {
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throw $e;
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}
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if (!$line) {
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$e->guess();
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} else {
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$e->setTemplateLine($line);
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}
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throw $e;
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}
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}
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/**
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* Returns all blocks.
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*
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* This method is for internal use only and should never be called
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* directly.
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*
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* @return array An array of blocks
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*
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* @internal
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*/
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public function getBlocks()
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{
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return $this->blocks;
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}
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public function display(array $context, array $blocks = array())
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{
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$this->displayWithErrorHandling($this->env->mergeGlobals($context), array_merge($this->blocks, $blocks));
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}
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public function render(array $context)
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{
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$level = ob_get_level();
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ob_start();
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try {
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$this->display($context);
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} catch (Exception $e) {
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while (ob_get_level() > $level) {
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ob_end_clean();
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}
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throw $e;
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} catch (Throwable $e) {
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while (ob_get_level() > $level) {
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ob_end_clean();
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}
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throw $e;
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}
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return ob_get_clean();
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}
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protected function displayWithErrorHandling(array $context, array $blocks = array())
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{
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try {
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$this->doDisplay($context, $blocks);
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} catch (Twig_Error $e) {
|
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if (!$e->getSourceContext()) {
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$e->setSourceContext($this->getSourceContext());
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}
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// this is mostly useful for Twig_Error_Loader exceptions
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// see Twig_Error_Loader
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if (false === $e->getTemplateLine()) {
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$e->setTemplateLine(-1);
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$e->guess();
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}
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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 rendering of a template ("%s").', $e->getMessage()), -1, $this->getSourceContext(), $e);
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}
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}
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|
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/**
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* Auto-generated method to display the template with the given context.
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*
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* @param array $context An array of parameters to pass to the template
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* @param array $blocks An array of blocks to pass to the template
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*/
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abstract protected function doDisplay(array $context, array $blocks = array());
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/**
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* Returns a variable from the context.
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*
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* This method is for internal use only and should never be called
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* directly.
|
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*
|
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* This method should not be overridden in a sub-class as this is an
|
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* implementation detail that has been introduced to optimize variable
|
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* access for versions of PHP before 5.4. This is not a way to override
|
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* the way to get a variable value.
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*
|
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* @param array $context The context
|
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* @param string $item The variable to return from the context
|
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* @param bool $ignoreStrictCheck Whether to ignore the strict variable check or not
|
|
*
|
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* @return mixed The content of the context variable
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*
|
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* @throws Twig_Error_Runtime if the variable does not exist and Twig is running in strict mode
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*
|
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* @internal
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|
*/
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final protected function getContext($context, $item, $ignoreStrictCheck = false)
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|
{
|
|
if (!array_key_exists($item, $context)) {
|
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if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
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return;
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}
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throw new Twig_Error_Runtime(sprintf('Variable "%s" does not exist.', $item), -1, $this->getSourceContext());
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}
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return $context[$item];
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}
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|
|
/**
|
|
* Returns the attribute value for a given array/object.
|
|
*
|
|
* @param mixed $object The object or array from where to get the item
|
|
* @param mixed $item The item to get from the array or object
|
|
* @param array $arguments An array of arguments to pass if the item is an object method
|
|
* @param string $type The type of attribute (@see Twig_Template constants)
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|
* @param bool $isDefinedTest Whether this is only a defined check
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|
* @param bool $ignoreStrictCheck Whether to ignore the strict attribute check or not
|
|
*
|
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* @return mixed The attribute value, or a Boolean when $isDefinedTest is true, or null when the attribute is not set and $ignoreStrictCheck is true
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|
*
|
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* @throws Twig_Error_Runtime if the attribute does not exist and Twig is running in strict mode and $isDefinedTest is false
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|
*
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|
* @internal
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|
*/
|
|
protected function getAttribute($object, $item, array $arguments = array(), $type = self::ANY_CALL, $isDefinedTest = false, $ignoreStrictCheck = false)
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|
{
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|
// array
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|
if (self::METHOD_CALL !== $type) {
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|
$arrayItem = is_bool($item) || is_float($item) ? (int) $item : $item;
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|
|
if ((is_array($object) && (isset($object[$arrayItem]) || array_key_exists($arrayItem, $object)))
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|| ($object instanceof ArrayAccess && isset($object[$arrayItem]))
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) {
|
|
if ($isDefinedTest) {
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return true;
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}
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|
|
return $object[$arrayItem];
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}
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|
|
|
if (self::ARRAY_CALL === $type || !is_object($object)) {
|
|
if ($isDefinedTest) {
|
|
return false;
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}
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|
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if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
|
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return;
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}
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|
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if ($object instanceof ArrayAccess) {
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$message = sprintf('Key "%s" in object with ArrayAccess of class "%s" does not exist.', $arrayItem, get_class($object));
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} elseif (is_object($object)) {
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$message = sprintf('Impossible to access a key "%s" on an object of class "%s" that does not implement ArrayAccess interface.', $item, get_class($object));
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} elseif (is_array($object)) {
|
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if (empty($object)) {
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|
$message = sprintf('Key "%s" does not exist as the array is empty.', $arrayItem);
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} else {
|
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$message = sprintf('Key "%s" for array with keys "%s" does not exist.', $arrayItem, implode(', ', array_keys($object)));
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}
|
|
} elseif (self::ARRAY_CALL === $type) {
|
|
if (null === $object) {
|
|
$message = sprintf('Impossible to access a key ("%s") on a null variable.', $item);
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|
} else {
|
|
$message = sprintf('Impossible to access a key ("%s") on a %s variable ("%s").', $item, gettype($object), $object);
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}
|
|
} elseif (null === $object) {
|
|
$message = sprintf('Impossible to access an attribute ("%s") on a null variable.', $item);
|
|
} else {
|
|
$message = sprintf('Impossible to access an attribute ("%s") on a %s variable ("%s").', $item, gettype($object), $object);
|
|
}
|
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|
|
throw new Twig_Error_Runtime($message, -1, $this->getSourceContext());
|
|
}
|
|
}
|
|
|
|
if (!is_object($object)) {
|
|
if ($isDefinedTest) {
|
|
return false;
|
|
}
|
|
|
|
if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
|
|
return;
|
|
}
|
|
|
|
if (null === $object) {
|
|
$message = sprintf('Impossible to invoke a method ("%s") on a null variable.', $item);
|
|
} elseif (is_array($object)) {
|
|
$message = sprintf('Impossible to invoke a method ("%s") on an array.', $item);
|
|
} else {
|
|
$message = sprintf('Impossible to invoke a method ("%s") on a %s variable ("%s").', $item, gettype($object), $object);
|
|
}
|
|
|
|
throw new Twig_Error_Runtime($message, -1, $this->getSourceContext());
|
|
}
|
|
|
|
// object property
|
|
if (self::METHOD_CALL !== $type && !$object instanceof self) { // Twig_Template does not have public properties, and we don't want to allow access to internal ones
|
|
if (isset($object->$item) || array_key_exists((string) $item, $object)) {
|
|
if ($isDefinedTest) {
|
|
return true;
|
|
}
|
|
|
|
if ($this->env->hasExtension('Twig_Extension_Sandbox')) {
|
|
$this->env->getExtension('Twig_Extension_Sandbox')->checkPropertyAllowed($object, $item);
|
|
}
|
|
|
|
return $object->$item;
|
|
}
|
|
}
|
|
|
|
$class = get_class($object);
|
|
|
|
// object method
|
|
if (!isset(self::$cache[$class])) {
|
|
// get_class_methods returns all methods accessible in the scope, but we only want public ones to be accessible in templates
|
|
if ($object instanceof self) {
|
|
$ref = new ReflectionClass($class);
|
|
$methods = array();
|
|
|
|
foreach ($ref->getMethods(ReflectionMethod::IS_PUBLIC) as $refMethod) {
|
|
// Accessing the environment from templates is forbidden to prevent untrusted changes to the environment
|
|
if ('getenvironment' !== strtolower($refMethod->name)) {
|
|
$methods[] = $refMethod->name;
|
|
}
|
|
}
|
|
} else {
|
|
$methods = get_class_methods($object);
|
|
}
|
|
// sort values to have consistent behavior, so that "get" methods win precedence over "is" methods
|
|
sort($methods);
|
|
|
|
$cache = array();
|
|
|
|
foreach ($methods as $method) {
|
|
$cache[$method] = $method;
|
|
$cache[$lcName = strtolower($method)] = $method;
|
|
|
|
if ('g' === $lcName[0] && 0 === strpos($lcName, 'get')) {
|
|
$name = substr($method, 3);
|
|
$lcName = substr($lcName, 3);
|
|
} elseif ('i' === $lcName[0] && 0 === strpos($lcName, 'is')) {
|
|
$name = substr($method, 2);
|
|
$lcName = substr($lcName, 2);
|
|
} else {
|
|
continue;
|
|
}
|
|
|
|
// skip get() and is() methods (in which case, $name is empty)
|
|
if ($name) {
|
|
if (!isset($cache[$name])) {
|
|
$cache[$name] = $method;
|
|
}
|
|
if (!isset($cache[$lcName])) {
|
|
$cache[$lcName] = $method;
|
|
}
|
|
}
|
|
}
|
|
self::$cache[$class] = $cache;
|
|
}
|
|
|
|
$call = false;
|
|
if (isset(self::$cache[$class][$item])) {
|
|
$method = self::$cache[$class][$item];
|
|
} elseif (isset(self::$cache[$class][$lcItem = strtolower($item)])) {
|
|
$method = self::$cache[$class][$lcItem];
|
|
} elseif (isset(self::$cache[$class]['__call'])) {
|
|
$method = $item;
|
|
$call = true;
|
|
} else {
|
|
if ($isDefinedTest) {
|
|
return false;
|
|
}
|
|
|
|
if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
|
|
return;
|
|
}
|
|
|
|
throw new Twig_Error_Runtime(sprintf('Neither the property "%1$s" nor one of the methods "%1$s()", "get%1$s()"/"is%1$s()" or "__call()" exist and have public access in class "%2$s".', $item, $class), -1, $this->getSourceContext());
|
|
}
|
|
|
|
if ($isDefinedTest) {
|
|
return true;
|
|
}
|
|
|
|
if ($this->env->hasExtension('Twig_Extension_Sandbox')) {
|
|
$this->env->getExtension('Twig_Extension_Sandbox')->checkMethodAllowed($object, $method);
|
|
}
|
|
|
|
// Some objects throw exceptions when they have __call, and the method we try
|
|
// to call is not supported. If ignoreStrictCheck is true, we should return null.
|
|
try {
|
|
if (!$arguments) {
|
|
$ret = $object->$method();
|
|
} else {
|
|
$ret = call_user_func_array(array($object, $method), $arguments);
|
|
}
|
|
} catch (BadMethodCallException $e) {
|
|
if ($call && ($ignoreStrictCheck || !$this->env->isStrictVariables())) {
|
|
return;
|
|
}
|
|
throw $e;
|
|
}
|
|
|
|
// @deprecated in 1.28
|
|
if ($object instanceof Twig_TemplateInterface) {
|
|
$self = $object->getTemplateName() === $this->getTemplateName();
|
|
$message = sprintf('Calling "%s" on template "%s" from template "%s" is deprecated since version 1.28 and won\'t be supported anymore in 2.0.', $item, $object->getTemplateName(), $this->getTemplateName());
|
|
if ('renderBlock' === $method || 'displayBlock' === $method) {
|
|
$message .= sprintf(' Use block("%s"%s) instead).', $arguments[0], $self ? '' : ', template');
|
|
} elseif ('hasBlock' === $method) {
|
|
$message .= sprintf(' Use "block("%s"%s) is defined" instead).', $arguments[0], $self ? '' : ', template');
|
|
} elseif ('render' === $method || 'display' === $method) {
|
|
$message .= sprintf(' Use include("%s") instead).', $object->getTemplateName());
|
|
}
|
|
@trigger_error($message, E_USER_DEPRECATED);
|
|
|
|
return '' === $ret ? '' : new Twig_Markup($ret, $this->env->getCharset());
|
|
}
|
|
|
|
return $ret;
|
|
}
|
|
}
|
|
|
|
class_alias('Twig_Template', 'Twig\Template', false);
|
|
|