Viewing file:  CalcFunction.php (2.11 KB) -rwxrwxrwx
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<?php
namespace Sabberworm\CSS\Value;
use Sabberworm\CSS\Parsing\ParserState;
use Sabberworm\CSS\Parsing\UnexpectedTokenException;
class CalcFunction extends CSSFunction {
const T_OPERAND = 1;
const T_OPERATOR = 2;
public static function parse(ParserState $oParserState) {
$aOperators = array('+', '-', '*', '/');
$sFunction = trim($oParserState->consumeUntil('(', false, true));
$oCalcList = new CalcRuleValueList($oParserState->currentLine());
$oList = new RuleValueList(',', $oParserState->currentLine());
$iNestingLevel = 0;
$iLastComponentType = NULL;
while(!$oParserState->comes(')') || $iNestingLevel > 0) {
$oParserState->consumeWhiteSpace();
if ($oParserState->comes('(')) {
$iNestingLevel++;
$oCalcList->addListComponent($oParserState->consume(1));
continue;
} else if ($oParserState->comes(')')) {
$iNestingLevel--;
$oCalcList->addListComponent($oParserState->consume(1));
continue;
}
if ($iLastComponentType != CalcFunction::T_OPERAND) {
$oVal = Value::parsePrimitiveValue($oParserState);
$oCalcList->addListComponent($oVal);
$iLastComponentType = CalcFunction::T_OPERAND;
} else {
if (in_array($oParserState->peek(), $aOperators)) {
if (($oParserState->comes('-') || $oParserState->comes('+'))) {
if ($oParserState->peek(1, -1) != ' ' || !($oParserState->comes('- ') || $oParserState->comes('+ '))) {
throw new UnexpectedTokenException(" {$oParserState->peek()} ", $oParserState->peek(1, -1) . $oParserState->peek(2), 'literal', $oParserState->currentLine());
}
}
$oCalcList->addListComponent($oParserState->consume(1));
$iLastComponentType = CalcFunction::T_OPERATOR;
} else {
throw new UnexpectedTokenException(
sprintf(
'Next token was expected to be an operand of type %s. Instead "%s" was found.',
implode(', ', $aOperators),
$oVal
),
'',
'custom',
$oParserState->currentLine()
);
}
}
}
$oList->addListComponent($oCalcList);
$oParserState->consume(')');
return new CalcFunction($sFunction, $oList, ',', $oParserState->currentLine());
}
}
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