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<?php |
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|
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namespace Sabberworm\CSS\Value; |
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|
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use Sabberworm\CSS\CSSElement; |
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use Sabberworm\CSS\Parsing\ParserState; |
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use Sabberworm\CSS\Parsing\SourceException; |
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use Sabberworm\CSS\Parsing\UnexpectedEOFException; |
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use Sabberworm\CSS\Parsing\UnexpectedTokenException; |
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use Sabberworm\CSS\Position\Position; |
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use Sabberworm\CSS\Position\Positionable; |
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|
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/** |
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* Abstract base class for specific classes of CSS values: `Size`, `Color`, `CSSString` and `URL`, and another |
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* abstract subclass `ValueList`. |
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*/ |
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abstract class Value implements CSSElement, Positionable |
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{ |
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use Position; |
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|
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/** |
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* @param int $iLineNo |
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*/ |
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public function __construct($iLineNo = 0) |
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{ |
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$this->setPosition($iLineNo); |
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} |
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|
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/** |
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* @param array<array-key, string> $aListDelimiters |
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* |
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* @return RuleValueList|CSSFunction|CSSString|LineName|Size|URL|string |
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* |
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* @throws UnexpectedTokenException |
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* @throws UnexpectedEOFException |
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* |
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* @internal since V8.8.0 |
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*/ |
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public static function parseValue(ParserState $oParserState, array $aListDelimiters = []) |
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{ |
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/** @var array<int, RuleValueList|CSSFunction|CSSString|LineName|Size|URL|string> $aStack */ |
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$aStack = []; |
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$oParserState->consumeWhiteSpace(); |
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//Build a list of delimiters and parsed values |
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while ( |
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!($oParserState->comes('}') || $oParserState->comes(';') || $oParserState->comes('!') |
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|| $oParserState->comes(')') |
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|| $oParserState->comes('\\') |
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|| $oParserState->isEnd()) |
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) { |
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if (count($aStack) > 0) { |
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$bFoundDelimiter = false; |
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foreach ($aListDelimiters as $sDelimiter) { |
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if ($oParserState->comes($sDelimiter)) { |
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array_push($aStack, $oParserState->consume($sDelimiter)); |
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$oParserState->consumeWhiteSpace(); |
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$bFoundDelimiter = true; |
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break; |
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} |
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} |
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if (!$bFoundDelimiter) { |
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//Whitespace was the list delimiter |
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array_push($aStack, ' '); |
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} |
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} |
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array_push($aStack, self::parsePrimitiveValue($oParserState)); |
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$oParserState->consumeWhiteSpace(); |
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} |
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// Convert the list to list objects |
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foreach ($aListDelimiters as $sDelimiter) { |
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$iStackLength = count($aStack); |
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if ($iStackLength === 1) { |
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return $aStack[0]; |
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} |
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$aNewStack = []; |
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for ($iStartPosition = 0; $iStartPosition < $iStackLength; ++$iStartPosition) { |
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if ($iStartPosition === ($iStackLength - 1) || $sDelimiter !== $aStack[$iStartPosition + 1]) { |
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$aNewStack[] = $aStack[$iStartPosition]; |
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continue; |
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} |
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$iLength = 2; //Number of elements to be joined |
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for ($i = $iStartPosition + 3; $i < $iStackLength; $i += 2, ++$iLength) { |
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if ($sDelimiter !== $aStack[$i]) { |
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break; |
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} |
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} |
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$oList = new RuleValueList($sDelimiter, $oParserState->currentLine()); |
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for ($i = $iStartPosition; $i - $iStartPosition < $iLength * 2; $i += 2) { |
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$oList->addListComponent($aStack[$i]); |
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} |
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$aNewStack[] = $oList; |
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$iStartPosition += $iLength * 2 - 2; |
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} |
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$aStack = $aNewStack; |
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} |
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if (!isset($aStack[0])) { |
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throw new UnexpectedTokenException( |
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" {$oParserState->peek()} ", |
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$oParserState->peek(1, -1) . $oParserState->peek(2), |
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'literal', |
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$oParserState->currentLine() |
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); |
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} |
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return $aStack[0]; |
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} |
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|
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/** |
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* @param bool $bIgnoreCase |
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* |
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* @return CSSFunction|string |
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* |
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* @throws UnexpectedEOFException |
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* @throws UnexpectedTokenException |
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* |
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* @internal since V8.8.0 |
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*/ |
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public static function parseIdentifierOrFunction(ParserState $oParserState, $bIgnoreCase = false) |
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{ |
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$oAnchor = $oParserState->anchor(); |
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$mResult = $oParserState->parseIdentifier($bIgnoreCase); |
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|
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if ($oParserState->comes('(')) { |
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$oAnchor->backtrack(); |
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if ($oParserState->streql('url', $mResult)) { |
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$mResult = URL::parse($oParserState); |
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} elseif ( |
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$oParserState->streql('calc', $mResult) |
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|| $oParserState->streql('-webkit-calc', $mResult) |
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|| $oParserState->streql('-moz-calc', $mResult) |
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) { |
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$mResult = CalcFunction::parse($oParserState); |
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} else { |
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$mResult = CSSFunction::parse($oParserState, $bIgnoreCase); |
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} |
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} |
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|
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return $mResult; |
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} |
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|
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/** |
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* @return CSSFunction|CSSString|LineName|Size|URL|string |
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* |
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* @throws UnexpectedEOFException |
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* @throws UnexpectedTokenException |
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* @throws SourceException |
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* |
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* @internal since V8.8.0 |
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*/ |
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public static function parsePrimitiveValue(ParserState $oParserState) |
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{ |
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$oValue = null; |
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$oParserState->consumeWhiteSpace(); |
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if ( |
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is_numeric($oParserState->peek()) |
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|| ($oParserState->comes('-.') |
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&& is_numeric($oParserState->peek(1, 2))) |
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|| (($oParserState->comes('-') || $oParserState->comes('.')) && is_numeric($oParserState->peek(1, 1))) |
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) { |
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$oValue = Size::parse($oParserState); |
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} elseif ($oParserState->comes('#') || $oParserState->comes('rgb', true) || $oParserState->comes('hsl', true)) { |
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$oValue = Color::parse($oParserState); |
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} elseif ($oParserState->comes("'") || $oParserState->comes('"')) { |
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$oValue = CSSString::parse($oParserState); |
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} elseif ($oParserState->comes("progid:") && $oParserState->getSettings()->bLenientParsing) { |
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$oValue = self::parseMicrosoftFilter($oParserState); |
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} elseif ($oParserState->comes("[")) { |
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$oValue = LineName::parse($oParserState); |
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} elseif ($oParserState->comes("U+")) { |
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$oValue = self::parseUnicodeRangeValue($oParserState); |
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} else { |
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$sNextChar = $oParserState->peek(1); |
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try { |
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$oValue = self::parseIdentifierOrFunction($oParserState); |
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} catch (UnexpectedTokenException $e) { |
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if (\in_array($sNextChar, ['+', '-', '*', '/'], true)) { |
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$oValue = $oParserState->consume(1); |
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} else { |
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throw $e; |
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} |
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} |
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} |
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$oParserState->consumeWhiteSpace(); |
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return $oValue; |
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} |
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|
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/** |
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* @return CSSFunction |
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* |
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* @throws UnexpectedEOFException |
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* @throws UnexpectedTokenException |
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*/ |
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private static function parseMicrosoftFilter(ParserState $oParserState) |
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{ |
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$sFunction = $oParserState->consumeUntil('(', false, true); |
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$aArguments = Value::parseValue($oParserState, [',', '=']); |
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return new CSSFunction($sFunction, $aArguments, ',', $oParserState->currentLine()); |
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} |
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|
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/** |
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* @return string |
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* |
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* @throws UnexpectedEOFException |
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* @throws UnexpectedTokenException |
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*/ |
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private static function parseUnicodeRangeValue(ParserState $oParserState) |
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{ |
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$iCodepointMaxLength = 6; // Code points outside BMP can use up to six digits |
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$sRange = ""; |
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$oParserState->consume("U+"); |
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do { |
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if ($oParserState->comes('-')) { |
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$iCodepointMaxLength = 13; // Max length is 2 six digit code points + the dash(-) between them |
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} |
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$sRange .= $oParserState->consume(1); |
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} while (strlen($sRange) < $iCodepointMaxLength && preg_match("/[A-Fa-f0-9\?-]/", $oParserState->peek())); |
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return "U+{$sRange}"; |
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} |
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} |
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|
