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<?php |
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/* |
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* This file is part of the puli/twig-puli-extension package. |
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* |
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* (c) Bernhard Schussek <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Puli\TwigExtension\NodeVisitor; |
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use Puli\TwigExtension\Node\LoadedByPuliNode; |
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use Twig_BaseNodeVisitor; |
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use Twig_Environment; |
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use Twig_Node; |
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use Twig_Node_Body; |
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use Twig_Node_Module; |
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use Webmozart\PathUtil\Path; |
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/** |
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* Adds the "puli-dir" attribute to all {@link Twig_Module} nodes that were |
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* loaded through the Puli loader. |
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* |
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* This attribute can be used to convert relative paths in the template to |
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* absolute paths. |
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* |
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* @since 1.0 |
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* |
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* @author Bernhard Schussek <[email protected]> |
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*/ |
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class PuliDirTagger extends Twig_BaseNodeVisitor |
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{ |
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/** |
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* @var Twig_Node_Module|null |
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*/ |
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private $moduleNode; |
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/** |
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* Called before child nodes are visited. |
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* |
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* @param Twig_Node $node The node to visit |
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* @param Twig_Environment $env The Twig environment instance |
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* |
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* @return Twig_Node The modified node |
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*/ |
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protected function doEnterNode(Twig_Node $node, Twig_Environment $env) |
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{ |
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if ($node instanceof Twig_Node_Module) { |
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$this->moduleNode = $node; |
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} |
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return $node; |
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} |
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/** |
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* Called after child nodes are visited. |
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* |
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* @param Twig_Node $node The node to visit |
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* @param Twig_Environment $env The Twig environment instance |
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* |
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* @return Twig_Node|false The modified node or false if the node must be removed |
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*/ |
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protected function doLeaveNode(Twig_Node $node, Twig_Environment $env) |
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{ |
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// Tag the node if it contains a LoadedByPuliNode |
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// This cannot be done in enterNode(), because only leaveNode() may |
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// return false in order to remove a node |
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if ($node instanceof LoadedByPuliNode) { |
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if (null !== $this->moduleNode) { |
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$this->moduleNode->setAttribute( |
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'puli-dir', |
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Path::getDirectory($this->moduleNode->getAttribute('filename')) |
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); |
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} |
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// Remove that node from the final tree |
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return false; |
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} |
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// Special case: Empty files that contained only the LoadedByPuliNode |
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// now contain no nodes anymore. Twig, however, expects Twig_Node_Body |
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// instances to have at least one (even if empty) node with name 0. |
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if ($node instanceof Twig_Node_Body) { |
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if (0 === $node->count()) { |
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$node->setNode(0, new Twig_Node(array(), array(), 1)); |
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} |
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} |
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return $node; |
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} |
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/** |
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* Returns the priority for this visitor. |
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* |
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* Priority should be between -10 and 10 (0 is the default). |
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* |
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* @return int The priority level |
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*/ |
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public function getPriority() |
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{ |
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// Should be launched very early on so that other visitors don't have |
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// to deal with the LoadedByPuliNode |
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return -10; |
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} |
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} |
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puli /
twig-extension
