Viewing file:  Value.php (5.04 KB) -rwxrwxrwx
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<?php
namespace Sabberworm\CSS\Value;
use Sabberworm\CSS\Parsing\ParserState;
use Sabberworm\CSS\Parsing\UnexpectedTokenException;
use Sabberworm\CSS\Renderable;
abstract class Value implements Renderable {
protected $iLineNo;
public function __construct($iLineNo = 0) {
$this->iLineNo = $iLineNo;
}
public static function parseValue(ParserState $oParserState, $aListDelimiters = array()) {
$aStack = array();
$oParserState->consumeWhiteSpace();
//Build a list of delimiters and parsed values
while (!($oParserState->comes('}') || $oParserState->comes(';') || $oParserState->comes('!') || $oParserState->comes(')') || $oParserState->comes('\\'))) {
if (count($aStack) > 0) {
$bFoundDelimiter = false;
foreach ($aListDelimiters as $sDelimiter) {
if ($oParserState->comes($sDelimiter)) {
array_push($aStack, $oParserState->consume($sDelimiter));
$oParserState->consumeWhiteSpace();
$bFoundDelimiter = true;
break;
}
}
if (!$bFoundDelimiter) {
//Whitespace was the list delimiter
array_push($aStack, ' ');
}
}
array_push($aStack, self::parsePrimitiveValue($oParserState));
$oParserState->consumeWhiteSpace();
}
//Convert the list to list objects
foreach ($aListDelimiters as $sDelimiter) {
if (count($aStack) === 1) {
return $aStack[0];
}
$iStartPosition = null;
while (($iStartPosition = array_search($sDelimiter, $aStack, true)) !== false) {
$iLength = 2; //Number of elements to be joined
for ($i = $iStartPosition + 2; $i < count($aStack); $i+=2, ++$iLength) {
if ($sDelimiter !== $aStack[$i]) {
break;
}
}
$oList = new RuleValueList($sDelimiter, $oParserState->currentLine());
for ($i = $iStartPosition - 1; $i - $iStartPosition + 1 < $iLength * 2; $i+=2) {
$oList->addListComponent($aStack[$i]);
}
array_splice($aStack, $iStartPosition - 1, $iLength * 2 - 1, array($oList));
}
}
if (!isset($aStack[0])) {
throw new UnexpectedTokenException(" {$oParserState->peek()} ", $oParserState->peek(1, -1) . $oParserState->peek(2), 'literal', $oParserState->currentLine());
}
return $aStack[0];
}
public static function parseIdentifierOrFunction(ParserState $oParserState, $bIgnoreCase = false) {
$sResult = $oParserState->parseIdentifier($bIgnoreCase);
if ($oParserState->comes('(')) {
$oParserState->consume('(');
$aArguments = Value::parseValue($oParserState, array('=', ' ', ','));
$sResult = new CSSFunction($sResult, $aArguments, ',', $oParserState->currentLine());
$oParserState->consume(')');
}
return $sResult;
}
public static function parsePrimitiveValue(ParserState $oParserState) {
$oValue = null;
$oParserState->consumeWhiteSpace();
if (is_numeric($oParserState->peek()) || ($oParserState->comes('-.') && is_numeric($oParserState->peek(1, 2))) || (($oParserState->comes('-') || $oParserState->comes('.')) && is_numeric($oParserState->peek(1, 1)))) {
$oValue = Size::parse($oParserState);
} else if ($oParserState->comes('#') || $oParserState->comes('rgb', true) || $oParserState->comes('hsl', true)) {
$oValue = Color::parse($oParserState);
} else if ($oParserState->comes('url', true)) {
$oValue = URL::parse($oParserState);
} else if ($oParserState->comes('calc', true) || $oParserState->comes('-webkit-calc', true) || $oParserState->comes('-moz-calc', true)) {
$oValue = CalcFunction::parse($oParserState);
} else if ($oParserState->comes("'") || $oParserState->comes('"')) {
$oValue = CSSString::parse($oParserState);
} else if ($oParserState->comes("progid:") && $oParserState->getSettings()->bLenientParsing) {
$oValue = self::parseMicrosoftFilter($oParserState);
} else if ($oParserState->comes("[")) {
$oValue = LineName::parse($oParserState);
} else if ($oParserState->comes("U+")) {
$oValue = self::parseUnicodeRangeValue($oParserState);
} else {
$oValue = self::parseIdentifierOrFunction($oParserState);
}
$oParserState->consumeWhiteSpace();
return $oValue;
}
private static function parseMicrosoftFilter(ParserState $oParserState) {
$sFunction = $oParserState->consumeUntil('(', false, true);
$aArguments = Value::parseValue($oParserState, array(',', '='));
return new CSSFunction($sFunction, $aArguments, ',', $oParserState->currentLine());
}
private static function parseUnicodeRangeValue(ParserState $oParserState) {
$iCodepointMaxLenth = 6; // Code points outside BMP can use up to six digits
$sRange = "";
$oParserState->consume("U+");
do {
if ($oParserState->comes('-')) $iCodepointMaxLenth = 13; // Max length is 2 six digit code points + the dash(-) between them
$sRange .= $oParserState->consume(1);
} while (strlen($sRange) < $iCodepointMaxLenth && preg_match("/[A-Fa-f0-9\?-]/", $oParserState->peek()));
return "U+{$sRange}";
}
/**
* @return int
*/
public function getLineNo() {
return $this->iLineNo;
}
//Methods are commented out because re-declaring them here is a fatal error in PHP < 5.3.9
//public abstract function __toString();
//public abstract function render(\Sabberworm\CSS\OutputFormat $oOutputFormat);
}
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