/**
* {@inheritdoc}
*/
public function handle(Reader $reader, TokenStream $stream)
{
$match = $reader->findPattern($this->patterns->getNumberPattern());
if (!$match) {
return false;
}
$stream->push(new Token(Token::TYPE_NUMBER, $match[0], $reader->getPosition()));
$reader->moveForward(strlen($match[0]));
return true;
}
/**
*
* {@inheritdoc}
*
*/
public function handle(Reader $reader, TokenStream $stream)
{
$match = $reader->findPattern('~^[ \\t\\r\\n\\f]+~');
if (false === $match) {
return false;
}
$stream->push(new Token(Token::TYPE_WHITESPACE, $match[0], $reader->getPosition()));
$reader->moveForward(strlen($match[0]));
return true;
}
/**
* {@inheritdoc}
*/
public function handle(Reader $reader, TokenStream $stream)
{
$match = $reader->findPattern($this->patterns->getIdentifierPattern());
if (!$match) {
return false;
}
$value = $this->escaping->escapeUnicode($match[0]);
$stream->push(new Token(Token::TYPE_IDENTIFIER, $value, $reader->getPosition()));
$reader->moveForward(strlen($match[0]));
return true;
}
public function testSkipWhitespace()
{
$stream = new TokenStream();
$stream->push($t1 = new Token(Token::TYPE_IDENTIFIER, 'h1', 0));
$stream->push($t2 = new Token(Token::TYPE_WHITESPACE, ' ', 2));
$stream->push($t3 = new Token(Token::TYPE_IDENTIFIER, 'h1', 3));
$stream->skipWhitespace();
$this->assertSame($t1, $stream->getNext());
$stream->skipWhitespace();
$this->assertSame($t3, $stream->getNext());
}
/**
* {@inheritdoc}
*/
public function handle(Reader $reader, TokenStream $stream)
{
$quote = $reader->getSubstring(1);
if (!in_array($quote, array("'", '"'))) {
return false;
}
$reader->moveForward(1);
$match = $reader->findPattern($this->patterns->getQuotedStringPattern($quote));
if (!$match) {
throw new InternalErrorException(sprintf('Should have found at least an empty match at %s.', $reader->getPosition()));
}
// check unclosed strings
if (strlen($match[0]) === $reader->getRemainingLength()) {
throw SyntaxErrorException::unclosedString($reader->getPosition() - 1);
}
// check quotes pairs validity
if ($quote !== $reader->getSubstring(1, strlen($match[0]))) {
throw SyntaxErrorException::unclosedString($reader->getPosition() - 1);
}
$string = $this->escaping->escapeUnicodeAndNewLine($match[0]);
$stream->push(new Token(Token::TYPE_STRING, $string, $reader->getPosition()));
$reader->moveForward(strlen($match[0]) + 1);
return true;
}
/**
* Parses next attribute node.
*
* @param Node\NodeInterface $selector
* @param TokenStream $stream
*
* @throws SyntaxErrorException
*
* @return Node\AttributeNode
*/
private function parseAttributeNode(Node\NodeInterface $selector, TokenStream $stream)
{
$stream->skipWhitespace();
$attribute = $stream->getNextIdentifierOrStar();
if (null === $attribute && !$stream->getPeek()->isDelimiter(array('|'))) {
throw SyntaxErrorException::unexpectedToken('"|"', $stream->getPeek());
}
if ($stream->getPeek()->isDelimiter(array('|'))) {
$stream->getNext();
if ($stream->getPeek()->isDelimiter(array('='))) {
$namespace = null;
$stream->getNext();
$operator = '|=';
} else {
$namespace = $attribute;
$attribute = $stream->getNextIdentifier();
$operator = null;
}
} else {
$namespace = $operator = null;
}
if (null === $operator) {
$stream->skipWhitespace();
$next = $stream->getNext();
if ($next->isDelimiter(array(']'))) {
return new Node\AttributeNode($selector, $namespace, $attribute, 'exists', null);
} elseif ($next->isDelimiter(array('='))) {
$operator = '=';
} elseif ($next->isDelimiter(array('^', '$', '*', '~', '|', '!')) && $stream->getPeek()->isDelimiter(array('='))) {
$operator = $next->getValue() . '=';
$stream->getNext();
} else {
throw SyntaxErrorException::unexpectedToken('operator', $next);
}
}
$stream->skipWhitespace();
$value = $stream->getNext();
if ($value->isNumber()) {
// if the value is a number, it's casted into a string
$value = new Token(Token::TYPE_STRING, (string) $value->getValue(), $value->getPosition());
}
if (!($value->isIdentifier() || $value->isString())) {
throw SyntaxErrorException::unexpectedToken('string or identifier', $value);
}
$stream->skipWhitespace();
$next = $stream->getNext();
if (!$next->isDelimiter(array(']'))) {
throw SyntaxErrorException::unexpectedToken('"]"', $next);
}
return new Node\AttributeNode($selector, $namespace, $attribute, $operator, $value->getValue());
}
