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<?php |
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/* |
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* This file is part of the ILess |
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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 ILess\Visitor; |
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use ILess\Context; |
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use ILess\Exception\Exception; |
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use ILess\Exception\ImportException; |
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use ILess\ImportedFile; |
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use ILess\Importer; |
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use ILess\ImportSequencer; |
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use ILess\Node\DetachedRulesetNode; |
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use ILess\Node\DirectiveNode; |
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use ILess\Node\ImportNode; |
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use ILess\Node\MediaNode; |
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use ILess\Node\MixinDefinitionNode; |
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use ILess\Node\RuleNode; |
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use ILess\Node\RulesetNode; |
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/** |
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* Import visitor. |
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*/ |
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class ImportVisitor extends Visitor |
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{ |
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/** |
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* The importer. |
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* |
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* @var Importer |
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*/ |
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protected $importer; |
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/** |
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* Finished flag. |
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* |
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* @var bool |
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*/ |
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protected $isFinished = false; |
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/** |
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* The context. |
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* |
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* @var Context |
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*/ |
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protected $context; |
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/** |
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* @var Exception |
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*/ |
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protected $error; |
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/** |
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* @var int |
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*/ |
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private $importCount = 0; |
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/** |
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* @var string |
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*/ |
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protected $type = VisitorInterface::TYPE_PRE_COMPILE; |
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/** |
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* Constructor. |
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* |
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* @param Context $context The context |
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* @param Importer $importer The importer |
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*/ |
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public function __construct(Context $context, Importer $importer) |
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{ |
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parent::__construct(); |
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$this->context = Context::createCopyForCompilation($context); |
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$this->importer = $importer; |
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$this->sequencer = new ImportSequencer( |
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function () { |
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if (!$this->isFinished) { |
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return; |
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} |
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if ($this->error) { |
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throw $this->error; |
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} |
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} |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function run($root) |
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{ |
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$this->visit($root); |
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$this->isFinished = true; |
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$this->sequencer->tryRun(); |
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} |
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/** |
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* Visits a import node. |
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* |
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* @param ImportNode $node The node |
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* @param VisitorArguments $arguments The arguments |
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* |
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* @return ImportNode |
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*/ |
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public function visitImport(ImportNode $node, VisitorArguments $arguments) |
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{ |
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if (!$node->css || $node->getOption('inline')) { |
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$context = Context::createCopyForCompilation($this->context, $this->context->frames); |
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$importParent = $context->frames[0]; |
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++$this->importCount; |
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if ($node->isVariableImport()) { |
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$this->sequencer->addVariableImport( |
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function () use ($node, $context, $importParent) { |
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$this->processImportNode($node, $context, $importParent); |
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} |
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); |
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} else { |
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$this->sequencer->addImport( |
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function () use ($node, $context, $importParent) { |
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$this->processImportNode($node, $context, $importParent); |
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} |
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); |
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} |
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} |
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$arguments->visitDeeper = false; |
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return $node; |
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} |
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private function processImportNode(ImportNode $node, Context $context, $importParent) |
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{ |
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$e = null; |
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try { |
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$compiledNode = $node->compileForImport($context); |
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} catch (Exception $e) { |
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$compiledNode = false; |
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if (!$e->getCurrentFile()) { |
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if ($node->currentFileInfo) { |
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$e->setCurrentFile($node->currentFileInfo, $node->index); |
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} else { |
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$e->setIndex($node->index); |
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} |
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} |
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$node->css = true; |
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$node->error = $e; |
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} |
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$inlineCSS = $node->getOption('inline'); |
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$isPlugin = $node->getOption('plugin'); |
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if ($compiledNode && (!$compiledNode->css || $inlineCSS)) { |
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if ($node->getOption('multiple')) { |
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$context->importMultiple = true; |
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} |
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for ($i = 0; $i < count($importParent->rules); ++$i) { |
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if ($importParent->rules[$i] === $node) { |
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$importParent->rules[$i] = $compiledNode; |
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break; |
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} |
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} |
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$tryAppendLessExtension = !$compiledNode->css; |
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try { |
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// import the file |
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list($alreadyImported, $file) = $this->importer->import( |
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$compiledNode->getPath(), |
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$tryAppendLessExtension, |
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$compiledNode->currentFileInfo, |
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$compiledNode->options, |
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$compiledNode->index |
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); |
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/* @var $file ImportedFile */ |
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if (!$context->importMultiple) { |
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if ($alreadyImported) { |
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$compiledNode->skip = true; |
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} |
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} |
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if ($root = $file->getRuleset()) { |
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/* @var $root RulesetNode */ |
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$compiledNode->root = $root; |
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$compiledNode->importedFilename = $file->getPath(); |
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if (!$inlineCSS && !$isPlugin && ($context->importMultiple || !$alreadyImported)) { |
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$oldEnv = $this->context; |
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$this->context = $context; |
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try { |
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$this->visit($root); |
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} catch (Exception $e) { |
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$this->error = $e; |
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} |
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$this->end = $oldEnv; |
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} |
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} |
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} catch (ImportException $e) { |
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// optional import |
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if (isset($compiledNode->options['optional']) && $compiledNode->options['optional']) { |
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// optional import |
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} else { |
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$this->error = $e; |
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} |
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} catch (Exception $e) { |
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$this->error = $e; |
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} |
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} |
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--$this->importCount; |
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if ($this->isFinished) { |
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$this->sequencer->tryRun(); |
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} |
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} |
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/** |
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* Visits a rule node. |
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* |
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* @param RuleNode $node The node |
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* @param VisitorArguments $arguments The arguments |
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* |
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* @return RuleNode |
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*/ |
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public function visitRule(RuleNode $node, VisitorArguments $arguments) |
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{ |
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if ($node->value instanceof DetachedRulesetNode) { |
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array_unshift($this->context->frames, $node); |
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} else { |
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$arguments->visitDeeper = false; |
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} |
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return $node; |
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} |
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/** |
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* Visits a rule node (!again). |
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* |
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* @param RuleNode $node The node |
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* @param VisitorArguments $arguments The arguments |
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* |
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* @return RuleNode |
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*/ |
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public function visitRuleOut(RuleNode $node, VisitorArguments $arguments) |
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{ |
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if ($node->value instanceof DetachedRulesetNode) { |
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array_shift($this->context->frames); |
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} |
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return $node; |
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} |
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/** |
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* Visits a directive node. |
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* |
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* @param DirectiveNode $node The node |
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* @param VisitorArguments $arguments The arguments |
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* |
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* @return DirectiveNode |
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*/ |
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public function visitDirective(DirectiveNode $node, VisitorArguments $arguments) |
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{ |
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array_unshift($this->context->frames, $node); |
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return $node; |
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} |
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/** |
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* Visits a directive node (!again). |
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* |
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* @param DirectiveNode $node The node |
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* @param VisitorArguments $arguments The arguments |
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* |
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* @return DirectiveNode |
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*/ |
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public function visitDirectiveOut(DirectiveNode $node, VisitorArguments $arguments) |
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{ |
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array_shift($this->context->frames); |
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return $node; |
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} |
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/** |
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* Visits a mixin definition node. |
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* |
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* @param MixinDefinitionNode $node The node |
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* @param VisitorArguments $arguments The arguments |
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* |
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* @return MixinDefinitionNode |
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*/ |
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public function visitMixinDefinition(MixinDefinitionNode $node, VisitorArguments $arguments) |
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{ |
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array_unshift($this->context->frames, $node); |
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return $node; |
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} |
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/** |
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* Visits a mixin definition node (!again). |
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* |
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* @param MixinDefinitionNode $node The node |
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* @param VisitorArguments $arguments The arguments |
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* |
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* @return MixinDefinitionNode |
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*/ |
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public function visitMixinDefinitionOut(MixinDefinitionNode $node, VisitorArguments $arguments) |
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{ |
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array_shift($this->context->frames); |
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return $node; |
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} |
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/** |
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* Visits a ruleset node. |
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* |
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* @param RulesetNode $node The node |
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* @param VisitorArguments $arguments The arguments |
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* |
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* @return RulesetNode |
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*/ |
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public function visitRuleset(RulesetNode $node, VisitorArguments $arguments) |
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{ |
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array_unshift($this->context->frames, $node); |
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return $node; |
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} |
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/** |
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* Visits a ruleset node (!again). |
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* |
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* @param RulesetNode $node The node |
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* @param VisitorArguments $arguments The arguments |
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* |
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* @return RulesetNode |
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*/ |
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public function visitRulesetOut(RulesetNode $node, VisitorArguments $arguments) |
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{ |
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array_shift($this->context->frames); |
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return $node; |
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} |
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349
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/** |
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* Visits a media node. |
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* |
|
352
|
|
|
* @param MediaNode $node The node |
|
353
|
|
|
* @param VisitorArguments $arguments The arguments |
|
354
|
|
|
* |
|
355
|
|
|
* @return MediaNode |
|
356
|
|
|
*/ |
|
357
|
|
|
public function visitMedia(MediaNode $node, VisitorArguments $arguments) |
|
358
|
|
|
{ |
|
359
|
|
|
array_unshift($this->context->frames, $node->rules[0]); |
|
360
|
|
|
|
|
361
|
|
|
return $node; |
|
362
|
|
|
} |
|
363
|
|
|
|
|
364
|
|
|
/** |
|
365
|
|
|
* Visits a media node (!again). |
|
366
|
|
|
* |
|
367
|
|
|
* @param MediaNode $node The node |
|
368
|
|
|
* @param VisitorArguments $arguments The arguments |
|
369
|
|
|
* |
|
370
|
|
|
* @return MediaNode |
|
371
|
|
|
*/ |
|
372
|
|
|
public function visitMediaOut(MediaNode $node, VisitorArguments $arguments) |
|
373
|
|
|
{ |
|
374
|
|
|
array_shift($this->context->frames); |
|
375
|
|
|
|
|
376
|
|
|
return $node; |
|
377
|
|
|
} |
|
378
|
|
|
} |
|
379
|
|
|
|
If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: