TokenListTokenizer.php
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TokenListTokenizer.php
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	<?php
	/**
	* @file
	* @license https://opensource.org/licenses/Apache-2.0 Apache-2.0
	*/

	namespace Wikimedia\CSS\Parser;

	use InvalidArgumentException;
	use Wikimedia\CSS\Objects\Token;
	use Wikimedia\CSS\Objects\TokenList;
	use Wikimedia\CSS\Util;

	/**
	* Tokenizer that just returns a predefined list of tokens
	*/
	class TokenListTokenizer implements Tokenizer {

	/** @var Token[] */
	protected $tokens;

	/** @var Token */
	protected $eof;

	/**
	* @param Token[]\|TokenList $tokens Tokens to return
	* @param Token\|null $eof Token to copy as EOF
	*/
	public function __construct( $tokens, ?Token $eof = null ) {
	if ( $tokens instanceof TokenList ) {
	$this->tokens = $tokens->toTokenArray();
	} elseif ( is_array( $tokens ) ) {
	Util::assertAllInstanceOf( $tokens, Token::class, '$tokens' );
	$this->tokens = $tokens;
	} else {
	throw new InvalidArgumentException( '$tokens must be a TokenList or an array of tokens' );
	}

	if ( $eof && $eof->type() === Token::T_EOF ) {
	$this->eof = $eof;
	} else {
	$data = [];
	if ( $eof ) {
	$data['position'] = $eof->getPosition();
	}
	$this->eof = new Token( Token::T_EOF, $data );
	}
	}

	/** @inheritDoc */
	public function getParseErrors() {
	return [];
	}

	/** @inheritDoc */
	public function clearParseErrors() {
	}

	/** @inheritDoc */
	public function consumeToken() {
	return array_shift( $this->tokens ) ?: $this->eof;
	}

	}