FM / NodeVisitor

/var/www/vhosts/ihelp.ro/httpdocs/vendor/twig/twig/src/NodeVisitor/

/var/www/vhosts/ihelp.ro/httpdocs/vendor/twig/twig/src/NodeVisitor

Name	Size	Mode	Actions
AbstractNodeVisitor.php	1174	0644	edit dl rm
EscaperNodeVisitor.php	7243	0644	edit dl rm
MacroAutoImportNodeVisitor.php	2228	0644	edit dl rm
NodeVisitorInterface.php	1013	0644	edit dl rm
OptimizerNodeVisitor.php	6598	0644	edit dl rm
SafeAnalysisNodeVisitor.php	4931	0644	edit dl rm
SandboxNodeVisitor.php	4384	0644	edit dl rm

Edit: /var/www/vhosts/ihelp.ro/httpdocs/vendor/twig/twig/src/NodeVisitor/OptimizerNodeVisitor.php (6598B)

<?php

/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Twig\NodeVisitor;

use Twig\Environment;
use Twig\Node\BlockReferenceNode;
use Twig\Node\Expression\BlockReferenceExpression;
use Twig\Node\Expression\ConstantExpression;
use Twig\Node\Expression\FilterExpression;
use Twig\Node\Expression\FunctionExpression;
use Twig\Node\Expression\GetAttrExpression;
use Twig\Node\Expression\NameExpression;
use Twig\Node\Expression\ParentExpression;
use Twig\Node\ForNode;
use Twig\Node\IncludeNode;
use Twig\Node\Node;
use Twig\Node\PrintNode;

/**
 * Tries to optimize the AST.
 *
 * This visitor is always the last registered one.
 *
 * You can configure which optimizations you want to activate via the
 * optimizer mode.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 *
 * @internal
 */
final class OptimizerNodeVisitor implements NodeVisitorInterface
{
    public const OPTIMIZE_ALL = -1;
    public const OPTIMIZE_NONE = 0;
    public const OPTIMIZE_FOR = 2;
    public const OPTIMIZE_RAW_FILTER = 4;

private $loops = [];
    private $loopsTargets = [];
    private $optimizers;

/**
     * @param int $optimizers The optimizer mode
     */
    public function __construct(int $optimizers = -1)
    {
        if ($optimizers > (self::OPTIMIZE_FOR | self::OPTIMIZE_RAW_FILTER)) {
            throw new \InvalidArgumentException(sprintf('Optimizer mode "%s" is not valid.', $optimizers));
        }

$this->optimizers = $optimizers;
    }

public function enterNode(Node $node, Environment $env): Node
    {
        if (self::OPTIMIZE_FOR === (self::OPTIMIZE_FOR & $this->optimizers)) {
            $this->enterOptimizeFor($node, $env);
        }

return $node;
    }

public function leaveNode(Node $node, Environment $env): ?Node
    {
        if (self::OPTIMIZE_FOR === (self::OPTIMIZE_FOR & $this->optimizers)) {
            $this->leaveOptimizeFor($node, $env);
        }

if (self::OPTIMIZE_RAW_FILTER === (self::OPTIMIZE_RAW_FILTER & $this->optimizers)) {
            $node = $this->optimizeRawFilter($node, $env);
        }

$node = $this->optimizePrintNode($node, $env);

return $node;
    }

/**
     * Optimizes print nodes.
     *
     * It replaces:
     *
     *   * "echo $this->render(Parent)Block()" with "$this->display(Parent)Block()"
     */
    private function optimizePrintNode(Node $node, Environment $env): Node
    {
        if (!$node instanceof PrintNode) {
            return $node;
        }

$exprNode = $node->getNode('expr');
        if (
            $exprNode instanceof BlockReferenceExpression ||
            $exprNode instanceof ParentExpression
        ) {
            $exprNode->setAttribute('output', true);

return $exprNode;
        }

return $node;
    }

/**
     * Removes "raw" filters.
     */
    private function optimizeRawFilter(Node $node, Environment $env): Node
    {
        if ($node instanceof FilterExpression && 'raw' == $node->getNode('filter')->getAttribute('value')) {
            return $node->getNode('node');
        }

return $node;
    }

/**
     * Optimizes "for" tag by removing the "loop" variable creation whenever possible.
     */
    private function enterOptimizeFor(Node $node, Environment $env): void
    {
        if ($node instanceof ForNode) {
            // disable the loop variable by default
            $node->setAttribute('with_loop', false);
            array_unshift($this->loops, $node);
            array_unshift($this->loopsTargets, $node->getNode('value_target')->getAttribute('name'));
            array_unshift($this->loopsTargets, $node->getNode('key_target')->getAttribute('name'));
        } elseif (!$this->loops) {
            // we are outside a loop
            return;
        }

// when do we need to add the loop variable back?

// the loop variable is referenced for the current loop
        elseif ($node instanceof NameExpression && 'loop' === $node->getAttribute('name')) {
            $node->setAttribute('always_defined', true);
            $this->addLoopToCurrent();
        }

// optimize access to loop targets
        elseif ($node instanceof NameExpression && \in_array($node->getAttribute('name'), $this->loopsTargets)) {
            $node->setAttribute('always_defined', true);
        }

// block reference
        elseif ($node instanceof BlockReferenceNode || $node instanceof BlockReferenceExpression) {
            $this->addLoopToCurrent();
        }

// include without the only attribute
        elseif ($node instanceof IncludeNode && !$node->getAttribute('only')) {
            $this->addLoopToAll();
        }

// include function without the with_context=false parameter
        elseif ($node instanceof FunctionExpression
            && 'include' === $node->getAttribute('name')
            && (!$node->getNode('arguments')->hasNode('with_context')
                 || false !== $node->getNode('arguments')->getNode('with_context')->getAttribute('value')
               )
        ) {
            $this->addLoopToAll();
        }

// the loop variable is referenced via an attribute
        elseif ($node instanceof GetAttrExpression
            && (!$node->getNode('attribute') instanceof ConstantExpression
                || 'parent' === $node->getNode('attribute')->getAttribute('value')
               )
            && (true === $this->loops[0]->getAttribute('with_loop')
                || ($node->getNode('node') instanceof NameExpression
                    && 'loop' === $node->getNode('node')->getAttribute('name')
                   )
               )
        ) {
            $this->addLoopToAll();
        }
    }

/**
     * Optimizes "for" tag by removing the "loop" variable creation whenever possible.
     */
    private function leaveOptimizeFor(Node $node, Environment $env): void
    {
        if ($node instanceof ForNode) {
            array_shift($this->loops);
            array_shift($this->loopsTargets);
            array_shift($this->loopsTargets);
        }
    }

private function addLoopToCurrent(): void
    {
        $this->loops[0]->setAttribute('with_loop', true);
    }

private function addLoopToAll(): void
    {
        foreach ($this->loops as $loop) {
            $loop->setAttribute('with_loop', true);
        }
    }

public function getPriority(): int
    {
        return 255;
    }
}

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