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Differences Between: [Versions 311 and 401] [Versions 311 and 402] [Versions 311 and 403]

   1  <?php
   2  namespace Sabberworm\CSS\Parsing;
   3  
   4  use Sabberworm\CSS\Comment\Comment;
   5  use Sabberworm\CSS\Parsing\UnexpectedTokenException;
   6  use Sabberworm\CSS\Settings;
   7  
   8  class ParserState {
   9  	 private $oParserSettings;
  10  
  11  	 private $sText;
  12  
  13  	 private $aText;
  14  	 private $iCurrentPosition;
  15  	 private $sCharset;
  16  	 private $iLength;
  17  	 private $iLineNo;
  18  
  19  	public function __construct($sText, Settings $oParserSettings, $iLineNo = 1) {
  20  	 	 $this->oParserSettings = $oParserSettings;
  21  	 	 $this->sText = $sText;
  22  	 	 $this->iCurrentPosition = 0;
  23  	 	 $this->iLineNo = $iLineNo;
  24  	 	 $this->setCharset($this->oParserSettings->sDefaultCharset);
  25  	 }
  26  
  27  	public function setCharset($sCharset) {
  28  	 	 $this->sCharset = $sCharset;
  29  	 	 $this->aText = $this->strsplit($this->sText);
  30  	 	 $this->iLength = count($this->aText);
  31  	 }
  32  
  33  	public function getCharset() {
  34  	 	 $this->oParserHelper->getCharset();
  35  	 	 return $this->sCharset;
  36  	 }
  37  
  38  	public function currentLine() {
  39  	 	 return $this->iLineNo;
  40  	 }
  41  
  42  	public function getSettings() {
  43  	 	 return $this->oParserSettings;
  44  	 }
  45  
  46  	public function parseIdentifier($bIgnoreCase = true) {
  47  	 	 $sResult = $this->parseCharacter(true);
  48  	 	 if ($sResult === null) {
  49  	 	 	 throw new UnexpectedTokenException($sResult, $this->peek(5), 'identifier', $this->iLineNo);
  50  	 	 }
  51  	 	 $sCharacter = null;
  52  	 	 while (($sCharacter = $this->parseCharacter(true)) !== null) {
  53  	 	 	 $sResult .= $sCharacter;
  54  	 	 }
  55  	 	 if ($bIgnoreCase) {
  56  	 	 	 $sResult = $this->strtolower($sResult);
  57  	 	 }
  58  	 	 return $sResult;
  59  	 }
  60  
  61  	public function parseCharacter($bIsForIdentifier) {
  62  	 	 if ($this->peek() === '\\') {
  63  	 	 	 if ($bIsForIdentifier && $this->oParserSettings->bLenientParsing && ($this->comes('\0') || $this->comes('\9'))) {
  64  	 	 	 	 // Non-strings can contain \0 or \9 which is an IE hack supported in lenient parsing.
  65  	 	 	 	 return null;
  66  	 	 	 }
  67  	 	 	 $this->consume('\\');
  68  	 	 	 if ($this->comes('\n') || $this->comes('\r')) {
  69  	 	 	 	 return '';
  70  	 	 	 }
  71  	 	 	 if (preg_match('/[0-9a-fA-F]/Su', $this->peek()) === 0) {
  72  	 	 	 	 return $this->consume(1);
  73  	 	 	 }
  74  	 	 	 $sUnicode = $this->consumeExpression('/^[0-9a-fA-F]{1,6}/u', 6);
  75  	 	 	 if ($this->strlen($sUnicode) < 6) {
  76  	 	 	 	 //Consume whitespace after incomplete unicode escape
  77  	 	 	 	 if (preg_match('/\\s/isSu', $this->peek())) {
  78  	 	 	 	 	 if ($this->comes('\r\n')) {
  79  	 	 	 	 	 	 $this->consume(2);
  80  	 	 	 	 	 } else {
  81  	 	 	 	 	 	 $this->consume(1);
  82  	 	 	 	 	 }
  83  	 	 	 	 }
  84  	 	 	 }
  85  	 	 	 $iUnicode = intval($sUnicode, 16);
  86  	 	 	 $sUtf32 = "";
  87  	 	 	 for ($i = 0; $i < 4; ++$i) {
  88  	 	 	 	 $sUtf32 .= chr($iUnicode & 0xff);
  89  	 	 	 	 $iUnicode = $iUnicode >> 8;
  90  	 	 	 }
  91  	 	 	 return iconv('utf-32le', $this->sCharset, $sUtf32);
  92  	 	 }
  93  	 	 if ($bIsForIdentifier) {
  94  	 	 	 $peek = ord($this->peek());
  95  	 	 	 // Ranges: a-z A-Z 0-9 - _
  96  	 	 	 if (($peek >= 97 && $peek <= 122) ||
  97  	 	 	 	 ($peek >= 65 && $peek <= 90) ||
  98  	 	 	 	 ($peek >= 48 && $peek <= 57) ||
  99  	 	 	 	 ($peek === 45) ||
 100  	 	 	 	 ($peek === 95) ||
 101  	 	 	 	 ($peek > 0xa1)) {
 102  	 	 	 	 return $this->consume(1);
 103  	 	 	 }
 104  	 	 } else {
 105  	 	 	 return $this->consume(1);
 106  	 	 }
 107  	 	 return null;
 108  	 }
 109  
 110  	public function consumeWhiteSpace() {
 111  	 	 $comments = array();
 112  	 	 do {
 113  	 	 	 while (preg_match('/\\s/isSu', $this->peek()) === 1) {
 114  	 	 	 	 $this->consume(1);
 115  	 	 	 }
 116  	 	 	 if($this->oParserSettings->bLenientParsing) {
 117  	 	 	 	 try {
 118  	 	 	 	 	 $oComment = $this->consumeComment();
 119  	 	 	 	 } catch(UnexpectedTokenException $e) {
 120  	 	 	 	 	 // When we can’t find the end of a comment, we assume the document is finished.
 121  	 	 	 	 	 $this->iCurrentPosition = $this->iLength;
 122  	 	 	 	 	 return;
 123  	 	 	 	 }
 124  	 	 	 } else {
 125  	 	 	 	 $oComment = $this->consumeComment();
 126  	 	 	 }
 127  	 	 	 if ($oComment !== false) {
 128  	 	 	 	 $comments[] = $oComment;
 129  	 	 	 }
 130  	 	 } while($oComment !== false);
 131  	 	 return $comments;
 132  	 }
 133  
 134  	public function comes($sString, $bCaseInsensitive = false) {
 135  	 	 $sPeek = $this->peek(strlen($sString));
 136  	 	 return ($sPeek == '')
 137  	 	 	 ? false
 138  	 	 	 : $this->streql($sPeek, $sString, $bCaseInsensitive);
 139  	 }
 140  
 141  	public function peek($iLength = 1, $iOffset = 0) {
 142  	 	 $iOffset += $this->iCurrentPosition;
 143  	 	 if ($iOffset >= $this->iLength) {
 144  	 	 	 return '';
 145  	 	 }
 146  	 	 return $this->substr($iOffset, $iLength);
 147  	 }
 148  
 149  	public function consume($mValue = 1) {
 150  	 	 if (is_string($mValue)) {
 151  	 	 	 $iLineCount = substr_count($mValue, "\n");
 152  	 	 	 $iLength = $this->strlen($mValue);
 153  	 	 	 if (!$this->streql($this->substr($this->iCurrentPosition, $iLength), $mValue)) {
 154  	 	 	 	 throw new UnexpectedTokenException($mValue, $this->peek(max($iLength, 5)), $this->iLineNo);
 155  	 	 	 }
 156  	 	 	 $this->iLineNo += $iLineCount;
 157  	 	 	 $this->iCurrentPosition += $this->strlen($mValue);
 158  	 	 	 return $mValue;
 159  	 	 } else {
 160  	 	 	 if ($this->iCurrentPosition + $mValue > $this->iLength) {
 161  	 	 	 	 throw new UnexpectedTokenException($mValue, $this->peek(5), 'count', $this->iLineNo);
 162  	 	 	 }
 163  	 	 	 $sResult = $this->substr($this->iCurrentPosition, $mValue);
 164  	 	 	 $iLineCount = substr_count($sResult, "\n");
 165  	 	 	 $this->iLineNo += $iLineCount;
 166  	 	 	 $this->iCurrentPosition += $mValue;
 167  	 	 	 return $sResult;
 168  	 	 }
 169  	 }
 170  
 171  	public function consumeExpression($mExpression, $iMaxLength = null) {
 172  	 	 $aMatches = null;
 173  	 	 $sInput = $iMaxLength !== null ? $this->peek($iMaxLength) : $this->inputLeft();
 174  	 	 if (preg_match($mExpression, $sInput, $aMatches, PREG_OFFSET_CAPTURE) === 1) {
 175  	 	 	 return $this->consume($aMatches[0][0]);
 176  	 	 }
 177  	 	 throw new UnexpectedTokenException($mExpression, $this->peek(5), 'expression', $this->iLineNo);
 178  	 }
 179  
 180  	 /**
 181  	  * @return false|Comment
 182  	  */
 183  	public function consumeComment() {
 184  	 	 $mComment = false;
 185  	 	 if ($this->comes('/*')) {
 186  	 	 	 $iLineNo = $this->iLineNo;
 187  	 	 	 $this->consume(1);
 188  	 	 	 $mComment = '';
 189  	 	 	 while (($char = $this->consume(1)) !== '') {
 190  	 	 	 	 $mComment .= $char;
 191  	 	 	 	 if ($this->comes('*/')) {
 192  	 	 	 	 	 $this->consume(2);
 193  	 	 	 	 	 break;
 194  	 	 	 	 }
 195  	 	 	 }
 196  	 	 }
 197  
 198  	 	 if ($mComment !== false) {
 199  	 	 	 // We skip the * which was included in the comment.
 200  	 	 	 return new Comment(substr($mComment, 1), $iLineNo);
 201  	 	 }
 202  
 203  	 	 return $mComment;
 204  	 }
 205  
 206  	public function isEnd() {
 207  	 	 return $this->iCurrentPosition >= $this->iLength;
 208  	 }
 209  
 210  	public function consumeUntil($aEnd, $bIncludeEnd = false, $consumeEnd = false, array &$comments = array()) {
 211  	 	 $aEnd = is_array($aEnd) ? $aEnd : array($aEnd);
 212  	 	 $out = '';
 213  	 	 $start = $this->iCurrentPosition;
 214  
 215  	 	 while (($char = $this->consume(1)) !== '') {
 216  	 	 	 if (in_array($char, $aEnd)) {
 217  	 	 	 	 if ($bIncludeEnd) {
 218  	 	 	 	 	 $out .= $char;
 219  	 	 	 	 } elseif (!$consumeEnd) {
 220  	 	 	 	 	 $this->iCurrentPosition -= $this->strlen($char);
 221  	 	 	 	 }
 222  	 	 	 	 return $out;
 223  	 	 	 }
 224  	 	 	 $out .= $char;
 225  	 	 	 if ($comment = $this->consumeComment()) {
 226  	 	 	 	 $comments[] = $comment;
 227  	 	 	 }
 228  	 	 }
 229  
 230  	 	 $this->iCurrentPosition = $start;
 231  	 	 throw new UnexpectedTokenException('One of ("'.implode('","', $aEnd).'")', $this->peek(5), 'search', $this->iLineNo);
 232  	 }
 233  
 234  	private function inputLeft() {
 235  	 	 return $this->substr($this->iCurrentPosition, -1);
 236  	 }
 237  
 238  	public function streql($sString1, $sString2, $bCaseInsensitive = true) {
 239  	 	 if($bCaseInsensitive) {
 240  	 	 	 return $this->strtolower($sString1) === $this->strtolower($sString2);
 241  	 	 } else {
 242  	 	 	 return $sString1 === $sString2;
 243  	 	 }
 244  	 }
 245  
 246  	public function backtrack($iAmount) {
 247  	 	 $this->iCurrentPosition -= $iAmount;
 248  	 }
 249  
 250  	public function strlen($sString) {
 251  	 	 if ($this->oParserSettings->bMultibyteSupport) {
 252  	 	 	 return mb_strlen($sString, $this->sCharset);
 253  	 	 } else {
 254  	 	 	 return strlen($sString);
 255  	 	 }	 
 256  	 }	 
 257  
 258  	private function substr($iStart, $iLength) {
 259  	 	 if ($iLength < 0) {
 260  	 	 	 $iLength = $this->iLength - $iStart + $iLength;
 261  	 	 }	 
 262  	 	 if ($iStart + $iLength > $this->iLength) {
 263  	 	 	 $iLength = $this->iLength - $iStart;
 264  	 	 }	 
 265  	 	 $sResult = '';
 266  	 	 while ($iLength > 0) {
 267  	 	 	 $sResult .= $this->aText[$iStart];
 268  	 	 	 $iStart++;
 269  	 	 	 $iLength--;
 270  	 	 }	 
 271  	 	 return $sResult;
 272  	 }
 273  
 274  	private function strtolower($sString) {
 275  	 	 if ($this->oParserSettings->bMultibyteSupport) {
 276  	 	 	 return mb_strtolower($sString, $this->sCharset);
 277  	 	 } else {
 278  	 	 	 return strtolower($sString);
 279  	 	 }
 280  	 }
 281  
 282  	private function strsplit($sString) {
 283  	 	 if ($this->oParserSettings->bMultibyteSupport) {
 284  	 	 	 if ($this->streql($this->sCharset, 'utf-8')) {
 285  	 	 	 	 return preg_split('//u', $sString, null, PREG_SPLIT_NO_EMPTY);
 286  	 	 	 } else {
 287  	 	 	 	 $iLength = mb_strlen($sString, $this->sCharset);
 288  	 	 	 	 $aResult = array();
 289  	 	 	 	 for ($i = 0; $i < $iLength; ++$i) {
 290  	 	 	 	 	 $aResult[] = mb_substr($sString, $i, 1, $this->sCharset);
 291  	 	 	 	 }
 292  	 	 	 	 return $aResult;
 293  	 	 	 }
 294  	 	 } else {
 295  	 	 	 if($sString === '') {
 296  	 	 	 	 return array();
 297  	 	 	 } else {
 298  	 	 	 	 return str_split($sString);
 299  	 	 	 }
 300  	 	 }
 301  	 }
 302  
 303  	private function strpos($sString, $sNeedle, $iOffset) {
 304  	 	 if ($this->oParserSettings->bMultibyteSupport) {
 305  	 	 	 return mb_strpos($sString, $sNeedle, $iOffset, $this->sCharset);
 306  	 	 } else {
 307  	 	 	 return strpos($sString, $sNeedle, $iOffset);
 308  	 	 }
 309  	 }
 310  }