<?php
namespace Automattic\WooCommerce\EmailEditorVendor\Sabberworm\CSS\Parsing;
if (!defined('ABSPATH')) exit;
use Automattic\WooCommerce\EmailEditorVendor\Sabberworm\CSS\Comment\Comment;
use Automattic\WooCommerce\EmailEditorVendor\Sabberworm\CSS\Settings;
class ParserState
{
 const EOF = null;
 private $oParserSettings;
 private $sText;
 private $aText;
 private $iCurrentPosition;
 private $sCharset;
 private $iLength;
 private $iLineNo;
 public function __construct($sText, Settings $oParserSettings, $iLineNo = 1)
 {
 $this->oParserSettings = $oParserSettings;
 $this->sText = $sText;
 $this->iCurrentPosition = 0;
 $this->iLineNo = $iLineNo;
 $this->setCharset($this->oParserSettings->sDefaultCharset);
 }
 public function setCharset($sCharset)
 {
 $this->sCharset = $sCharset;
 $this->aText = $this->strsplit($this->sText);
 if (is_array($this->aText)) {
 $this->iLength = count($this->aText);
 }
 }
 public function getCharset()
 {
 return $this->sCharset;
 }
 public function currentLine()
 {
 return $this->iLineNo;
 }
 public function currentColumn()
 {
 return $this->iCurrentPosition;
 }
 public function getSettings()
 {
 return $this->oParserSettings;
 }
 public function anchor()
 {
 return new Anchor($this->iCurrentPosition, $this);
 }
 public function setPosition($iPosition)
 {
 $this->iCurrentPosition = $iPosition;
 }
 public function parseIdentifier($bIgnoreCase = true)
 {
 if ($this->isEnd()) {
 throw new UnexpectedEOFException('', '', 'identifier', $this->iLineNo);
 }
 $sResult = $this->parseCharacter(true);
 if ($sResult === null) {
 throw new UnexpectedTokenException($sResult, $this->peek(5), 'identifier', $this->iLineNo);
 }
 $sCharacter = null;
 while (!$this->isEnd() && ($sCharacter = $this->parseCharacter(true)) !== null) {
 if (preg_match('/[a-zA-Z0-9\x{00A0}-\x{FFFF}_-]/Sux', $sCharacter)) {
 $sResult .= $sCharacter;
 } else {
 $sResult .= '\\' . $sCharacter;
 }
 }
 if ($bIgnoreCase) {
 $sResult = $this->strtolower($sResult);
 }
 return $sResult;
 }
 public function parseCharacter($bIsForIdentifier)
 {
 if ($this->peek() === '\\') {
 if (
 $bIsForIdentifier && $this->oParserSettings->bLenientParsing
 && ($this->comes('\0') || $this->comes('\9'))
 ) {
 // Non-strings can contain \0 or \9 which is an IE hack supported in lenient parsing.
 return null;
 }
 $this->consume('\\');
 if ($this->comes('\n') || $this->comes('\r')) {
 return '';
 }
 if (preg_match('/[0-9a-fA-F]/Su', $this->peek()) === 0) {
 return $this->consume(1);
 }
 $sUnicode = $this->consumeExpression('/^[0-9a-fA-F]{1,6}/u', 6);
 if ($this->strlen($sUnicode) < 6) {
 // Consume whitespace after incomplete unicode escape
 if (preg_match('/\\s/isSu', $this->peek())) {
 if ($this->comes('\r\n')) {
 $this->consume(2);
 } else {
 $this->consume(1);
 }
 }
 }
 $iUnicode = intval($sUnicode, 16);
 $sUtf32 = "";
 for ($i = 0; $i < 4; ++$i) {
 $sUtf32 .= chr($iUnicode & 0xff);
 $iUnicode = $iUnicode >> 8;
 }
 return iconv('utf-32le', $this->sCharset, $sUtf32);
 }
 if ($bIsForIdentifier) {
 $peek = ord($this->peek());
 // Ranges: a-z A-Z 0-9 - _
 if (
 ($peek >= 97 && $peek <= 122)
 || ($peek >= 65 && $peek <= 90)
 || ($peek >= 48 && $peek <= 57)
 || ($peek === 45)
 || ($peek === 95)
 || ($peek > 0xa1)
 ) {
 return $this->consume(1);
 }
 } else {
 return $this->consume(1);
 }
 return null;
 }
 public function consumeWhiteSpace()
 {
 $aComments = [];
 do {
 while (preg_match('/\\s/isSu', $this->peek()) === 1) {
 $this->consume(1);
 }
 if ($this->oParserSettings->bLenientParsing) {
 try {
 $oComment = $this->consumeComment();
 } catch (UnexpectedEOFException $e) {
 $this->iCurrentPosition = $this->iLength;
 return $aComments;
 }
 } else {
 $oComment = $this->consumeComment();
 }
 if ($oComment !== false) {
 $aComments[] = $oComment;
 }
 } while ($oComment !== false);
 return $aComments;
 }
 public function comes($sString, $bCaseInsensitive = false)
 {
 $sPeek = $this->peek(strlen($sString));
 return ($sPeek == '')
 ? false
 : $this->streql($sPeek, $sString, $bCaseInsensitive);
 }
 public function peek($iLength = 1, $iOffset = 0)
 {
 $iOffset += $this->iCurrentPosition;
 if ($iOffset >= $this->iLength) {
 return '';
 }
 return $this->substr($iOffset, $iLength);
 }
 public function consume($mValue = 1)
 {
 if (is_string($mValue)) {
 $iLineCount = substr_count($mValue, "\n");
 $iLength = $this->strlen($mValue);
 if (!$this->streql($this->substr($this->iCurrentPosition, $iLength), $mValue)) {
 throw new UnexpectedTokenException($mValue, $this->peek(max($iLength, 5)), $this->iLineNo);
 }
 $this->iLineNo += $iLineCount;
 $this->iCurrentPosition += $this->strlen($mValue);
 return $mValue;
 } else {
 if ($this->iCurrentPosition + $mValue > $this->iLength) {
 throw new UnexpectedEOFException($mValue, $this->peek(5), 'count', $this->iLineNo);
 }
 $sResult = $this->substr($this->iCurrentPosition, $mValue);
 $iLineCount = substr_count($sResult, "\n");
 $this->iLineNo += $iLineCount;
 $this->iCurrentPosition += $mValue;
 return $sResult;
 }
 }
 public function consumeExpression($mExpression, $iMaxLength = null)
 {
 $aMatches = null;
 $sInput = $iMaxLength !== null ? $this->peek($iMaxLength) : $this->inputLeft();
 if (preg_match($mExpression, $sInput, $aMatches, PREG_OFFSET_CAPTURE) === 1) {
 return $this->consume($aMatches[0][0]);
 }
 throw new UnexpectedTokenException($mExpression, $this->peek(5), 'expression', $this->iLineNo);
 }
 public function consumeComment()
 {
 $mComment = false;
 if ($this->comes('/*')) {
 $iLineNo = $this->iLineNo;
 $this->consume(1);
 $mComment = '';
 while (($char = $this->consume(1)) !== '') {
 $mComment .= $char;
 if ($this->comes('*/')) {
 $this->consume(2);
 break;
 }
 }
 }
 if ($mComment !== false) {
 // We skip the * which was included in the comment.
 return new Comment(substr($mComment, 1), $iLineNo);
 }
 return $mComment;
 }
 public function isEnd()
 {
 return $this->iCurrentPosition >= $this->iLength;
 }
 public function consumeUntil($aEnd, $bIncludeEnd = false, $consumeEnd = false, array &$comments = [])
 {
 $aEnd = is_array($aEnd) ? $aEnd : [$aEnd];
 $out = '';
 $start = $this->iCurrentPosition;
 while (!$this->isEnd()) {
 $char = $this->consume(1);
 if (in_array($char, $aEnd)) {
 if ($bIncludeEnd) {
 $out .= $char;
 } elseif (!$consumeEnd) {
 $this->iCurrentPosition -= $this->strlen($char);
 }
 return $out;
 }
 $out .= $char;
 if ($comment = $this->consumeComment()) {
 $comments[] = $comment;
 }
 }
 if (in_array(self::EOF, $aEnd)) {
 return $out;
 }
 $this->iCurrentPosition = $start;
 throw new UnexpectedEOFException(
 'One of ("' . implode('","', $aEnd) . '")',
 $this->peek(5),
 'search',
 $this->iLineNo
 );
 }
 private function inputLeft()
 {
 return $this->substr($this->iCurrentPosition, -1);
 }
 public function streql($sString1, $sString2, $bCaseInsensitive = true)
 {
 if ($bCaseInsensitive) {
 return $this->strtolower($sString1) === $this->strtolower($sString2);
 } else {
 return $sString1 === $sString2;
 }
 }
 public function backtrack($iAmount)
 {
 $this->iCurrentPosition -= $iAmount;
 }
 public function strlen($sString)
 {
 if ($this->oParserSettings->bMultibyteSupport) {
 return mb_strlen($sString, $this->sCharset);
 } else {
 return strlen($sString);
 }
 }
 private function substr($iStart, $iLength)
 {
 if ($iLength < 0) {
 $iLength = $this->iLength - $iStart + $iLength;
 }
 if ($iStart + $iLength > $this->iLength) {
 $iLength = $this->iLength - $iStart;
 }
 $sResult = '';
 while ($iLength > 0) {
 $sResult .= $this->aText[$iStart];
 $iStart++;
 $iLength--;
 }
 return $sResult;
 }
 private function strtolower($sString)
 {
 if ($this->oParserSettings->bMultibyteSupport) {
 return mb_strtolower($sString, $this->sCharset);
 } else {
 return strtolower($sString);
 }
 }
 private function strsplit($sString)
 {
 if ($this->oParserSettings->bMultibyteSupport) {
 if ($this->streql($this->sCharset, 'utf-8')) {
 return preg_split('//u', $sString, -1, PREG_SPLIT_NO_EMPTY);
 } else {
 $iLength = mb_strlen($sString, $this->sCharset);
 $aResult = [];
 for ($i = 0; $i < $iLength; ++$i) {
 $aResult[] = mb_substr($sString, $i, 1, $this->sCharset);
 }
 return $aResult;
 }
 } else {
 if ($sString === '') {
 return [];
 } else {
 return str_split($sString);
 }
 }
 }
 private function strpos($sString, $sNeedle, $iOffset)
 {
 if ($this->oParserSettings->bMultibyteSupport) {
 return mb_strpos($sString, $sNeedle, $iOffset, $this->sCharset);
 } else {
 return strpos($sString, $sNeedle, $iOffset);
 }
 }
}
