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<?php
namespace Sabberworm\CSS\Parsing;
use Sabberworm\CSS\Comment\Comment;
use Sabberworm\CSS\Parsing\UnexpectedTokenException;
use Sabberworm\CSS\Settings;
class ParserState {
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);
$this->iLength = count($this->aText);
}
public function getCharset() {
$this->oParserHelper->getCharset();
return $this->sCharset;
}
public function currentLine() {
return $this->iLineNo;
}
public function getSettings() {
return $this->oParserSettings;
}
public function parseIdentifier($bIgnoreCase = true) {
$sResult = $this->parseCharacter(true);
if ($sResult === null) {
throw new UnexpectedTokenException($sResult, $this->peek(5), 'identifier', $this->iLineNo);
}
$sCharacter = null;
while (($sCharacter = $this->parseCharacter(true)) !== null) {
$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() {
$comments = array();
do {
while (preg_match('/\\s/isSu', $this->peek()) === 1) {
$this->consume(1);
}
if($this->oParserSettings->bLenientParsing) {
try {
$oComment = $this->consumeComment();
} catch(UnexpectedTokenException $e) {
// When we can’t find the end of a comment, we assume the document is finished.
$this->iCurrentPosition = $this->iLength;
return;
}
} else {
$oComment = $this->consumeComment();
}
if ($oComment !== false) {
$comments[] = $oComment;
}
} while($oComment !== false);
return $comments;
}
public function comes($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 > $this->iLength) {
throw new UnexpectedTokenException($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);
}
/**
* @return false|Comment
*/
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 = array()) {
$aEnd = is_array($aEnd) ? $aEnd : array($aEnd);
$out = '';
$start = $this->iCurrentPosition;
while (($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;
}
}
$this->iCurrentPosition = $start;
throw new UnexpectedTokenException('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, null, PREG_SPLIT_NO_EMPTY);
} else {
$iLength = mb_strlen($sString, $this->sCharset);
$aResult = array();
for ($i = 0; $i < $iLength; ++$i) {
$aResult[] = mb_substr($sString, $i, 1, $this->sCharset);
}
return $aResult;
}
} else {
if($sString === '') {
return array();
} 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);
}
}
}