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WhitespaceMatcher.php
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WhitespaceMatcher.php
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<?php
/**
* @file
* @license https://opensource.org/licenses/Apache-2.0 Apache-2.0
*/
namespace Wikimedia\CSS\Grammar;
use Wikimedia\CSS\Objects\ComponentValueList;
use Wikimedia\CSS\Objects\Token;
/**
* Matcher that matches runs of whitespace.
*/
class WhitespaceMatcher extends Matcher {
/** @var bool */
protected $significant;
/**
* @param array $options
* - significant: (bool) Whether the whitespace being matched is significant.
* This also controls whether it behaves as `<ws>*` (false) or `<ws>+` (true).
*/
public function __construct( array $options = [] ) {
$this->significant = !empty( $options['significant'] );
}
/** @inheritDoc */
protected function generateMatches( ComponentValueList $values, $start, array $options ) {
$end = $start;
while ( isset( $values[$end] ) &&
// @phan-suppress-next-line PhanNonClassMethodCall False positive
$values[$end] instanceof Token && $values[$end]->type() === Token::T_WHITESPACE
) {
$end++;
}
// If it's not significant, return whatever we found.
if ( !$this->significant ) {
yield $this->makeMatch( $values, $start, $end );
return;
}
// If we found zero whitespace, $options says we're skipping
// whitespace, and whitespace was actually skipped, rewind one token.
// Otherwise, return no match.
if ( $end === $start ) {
$start--;
if ( !$options['skip-whitespace'] || !isset( $values[$start] ) ||
// @phan-suppress-next-line PhanNonClassMethodCall False positive
!$values[$start] instanceof Token || $values[$start]->type() !== Token::T_WHITESPACE
) {
return;
}
}
// Return the match. Include a 'significantWhitespace' capture.
yield $this->makeMatch( $values, $start, $end,
new GrammarMatch( $values, $start, 1, 'significantWhitespace' )
);
}
}

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text/x-php
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Sat, May 16, 18:39 (5 h, 6 m)
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WhitespaceMatcher.php (1 KB)

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