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419 lines
12 KiB
419 lines
12 KiB
7 years ago
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<?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 <fabien@symfony.com>
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*
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* @internal
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*/
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abstract class Twig_Template
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{
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const ANY_CALL = 'any';
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const ARRAY_CALL = 'array';
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const METHOD_CALL = 'method';
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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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/**
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* @internal
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*/
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protected $extensions = array();
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public function __construct(Twig_Environment $env)
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{
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$this->env = $env;
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$this->extensions = $env->getExtensions();
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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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abstract public function getDebugInfo();
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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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* 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_Template|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 $blocks = array())
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{
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if (isset($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(), $useBlocks = true)
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{
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if ($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, $blocks), false);
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} elseif (isset($blocks[$name])) {
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throw new Twig_Error_Runtime(sprintf('Block "%s" should not call parent() in "%s" as the block does not exist in the parent template "%s".', $name, $blocks[$name][0]->getTemplateName(), $this->getTemplateName()), -1, $blocks[$name][0]->getTemplateName());
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} else {
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throw new Twig_Error_Runtime(sprintf('Block "%s" on template "%s" does not exist.', $name, $this->getTemplateName()), -1, $this->getTemplateName());
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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, array $blocks = array())
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{
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if (isset($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, array $blocks = array())
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{
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$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 $e) {
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|
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if (!$e->getSourceContext()) {
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|
|
$e->setSourceContext($templateName ? new Twig_Source('', $templateName) : $this->getSourceContext());
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|
|
}
|
||
|
|
|
||
|
|
if ($e->getTemplateLine()) {
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|
|
throw $e;
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|
|
}
|
||
|
|
|
||
|
|
if (!$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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||
|
|
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||
|
|
throw $e;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns all blocks.
|
||
|
|
*
|
||
|
|
* This method is for internal use only and should never be called
|
||
|
|
* directly.
|
||
|
|
*
|
||
|
|
* @return array An array of blocks
|
||
|
|
*
|
||
|
|
* @internal
|
||
|
|
*/
|
||
|
|
public function getBlocks()
|
||
|
|
{
|
||
|
|
return $this->blocks;
|
||
|
|
}
|
||
|
|
|
||
|
|
public function display(array $context, array $blocks = array())
|
||
|
|
{
|
||
|
|
$this->displayWithErrorHandling($this->env->mergeGlobals($context), array_merge($this->blocks, $blocks));
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||
|
|
}
|
||
|
|
|
||
|
|
public function render(array $context)
|
||
|
|
{
|
||
|
|
$level = ob_get_level();
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||
|
|
ob_start();
|
||
|
|
try {
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|
|
$this->display($context);
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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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|
throw $e;
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}
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||
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return ob_get_clean();
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}
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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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||
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|
} catch (Twig_Error $e) {
|
||
|
|
if (!$e->getSourceContext()) {
|
||
|
|
$e->setSourceContext($this->getSourceContext());
|
||
|
|
}
|
||
|
|
|
||
|
|
// this is mostly useful for Twig_Error_Loader exceptions
|
||
|
|
// see Twig_Error_Loader
|
||
|
|
if (false === $e->getTemplateLine()) {
|
||
|
|
$e->setTemplateLine(-1);
|
||
|
|
$e->guess();
|
||
|
|
}
|
||
|
|
|
||
|
|
throw $e;
|
||
|
|
} catch (Exception $e) {
|
||
|
|
throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $this->getSourceContext(), $e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Auto-generated method to display the template with the given context.
|
||
|
|
*
|
||
|
|
* @param array $context An array of parameters to pass to the template
|
||
|
|
* @param array $blocks An array of blocks to pass to the template
|
||
|
|
*/
|
||
|
|
abstract protected function doDisplay(array $context, array $blocks = array());
|
||
|
|
}
|
||
|
|
|
||
|
|
class_alias('Twig_Template', 'Twig\Template', false);
|