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<?php
/**
* @link https://craftcms.com/
* @copyright Copyright (c) Pixel & Tonic, Inc.
* @license https://craftcms.github.io/license/
*/
namespace craft\web\twig\tokenparsers;
use craft\web\twig\nodes\NavNode;
use Twig\Node\Expression\AssignNameExpression;
use Twig\Node\Node;
use Twig\Parser;
use Twig\Token;
use Twig\TokenParser\AbstractTokenParser;
/**
* Recursively outputs a hierarchical navigation.
*
* @author Pixel & Tonic, Inc. <support@pixelandtonic.com>
* @since 3.0
*/
class NavTokenParser extends AbstractTokenParser
{
// Public Methods
// =========================================================================
/**
* @inheritdoc
*/
public function getTag()
{
return 'nav';
}
/**
* @inheritdoc
*/
public function parse(Token $token)
{
$lineno = $token->getLine();
/** @var Parser $parser */
$parser = $this->parser;
$stream = $parser->getStream();
$targets = $parser->getExpressionParser()->parseAssignmentExpression();
$stream->expect(Token::OPERATOR_TYPE, 'in');
$seq = $parser->getExpressionParser()->parseExpression();
$stream->expect(Token::BLOCK_END_TYPE);
$upperBody = $parser->subparse([$this, 'decideNavFork']);
$lowerBody = new Node();
$indent = new Node();
$outdent = new Node();
$nextValue = $stream->next()->getValue();
if ($nextValue !== 'endnav') {
$stream->expect(Token::BLOCK_END_TYPE);
if ($nextValue === 'ifchildren') {
$indent = $parser->subparse([
$this,
'decideChildrenFork'
], true);
$stream->expect(Token::BLOCK_END_TYPE);
$outdent = $parser->subparse([
$this,
'decideChildrenEnd'
], true);
$stream->expect(Token::BLOCK_END_TYPE);
}
$lowerBody = $parser->subparse([$this, 'decideNavEnd'], true);
}
$stream->expect(Token::BLOCK_END_TYPE);
if (count($targets) > 1) {
$keyTarget = $targets->getNode(0);
$keyTarget = new AssignNameExpression($keyTarget->getAttribute('name'), $keyTarget->getTemplateLine());
$valueTarget = $targets->getNode(1);
$valueTarget = new AssignNameExpression($valueTarget->getAttribute('name'), $valueTarget->getTemplateLine());
} else {
$keyTarget = new AssignNameExpression('_key', $lineno);
$valueTarget = $targets->getNode(0);
$valueTarget = new AssignNameExpression($valueTarget->getAttribute('name'), $valueTarget->getTemplateLine());
}
return new NavNode($keyTarget, $valueTarget, $seq, $upperBody, $lowerBody, $indent, $outdent, $lineno, $this->getTag());
}
/**
* @param Token $token
* @return bool
*/
public function decideNavFork(Token $token): bool
{
return $token->test(['ifchildren', 'children', 'endnav']);
}
/**
* @param Token $token
* @return bool
*/
public function decideChildrenFork(Token $token): bool
{
return $token->test('children');
}
/**
* @param Token $token
* @return bool
*/
public function decideChildrenEnd(Token $token): bool
{
return $token->test('endifchildren');
}
/**
* @param Token $token
* @return bool
*/
public function decideNavEnd(Token $token): bool
{
return $token->test('endnav');
}
}
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