CalcFunction.php
| 1 | <?php |
| 2 | |
| 3 | namespace IAWP\Sabberworm\CSS\Value; |
| 4 | |
| 5 | use IAWP\Sabberworm\CSS\Parsing\ParserState; |
| 6 | use IAWP\Sabberworm\CSS\Parsing\UnexpectedEOFException; |
| 7 | use IAWP\Sabberworm\CSS\Parsing\UnexpectedTokenException; |
| 8 | class CalcFunction extends CSSFunction |
| 9 | { |
| 10 | /** |
| 11 | * @var int |
| 12 | */ |
| 13 | const T_OPERAND = 1; |
| 14 | /** |
| 15 | * @var int |
| 16 | */ |
| 17 | const T_OPERATOR = 2; |
| 18 | /** |
| 19 | * @return CalcFunction |
| 20 | * |
| 21 | * @throws UnexpectedTokenException |
| 22 | * @throws UnexpectedEOFException |
| 23 | */ |
| 24 | public static function parse(ParserState $oParserState) |
| 25 | { |
| 26 | $aOperators = ['+', '-', '*', '/']; |
| 27 | $sFunction = \trim($oParserState->consumeUntil('(', \false, \true)); |
| 28 | $oCalcList = new CalcRuleValueList($oParserState->currentLine()); |
| 29 | $oList = new RuleValueList(',', $oParserState->currentLine()); |
| 30 | $iNestingLevel = 0; |
| 31 | $iLastComponentType = null; |
| 32 | while (!$oParserState->comes(')') || $iNestingLevel > 0) { |
| 33 | $oParserState->consumeWhiteSpace(); |
| 34 | if ($oParserState->comes('(')) { |
| 35 | $iNestingLevel++; |
| 36 | $oCalcList->addListComponent($oParserState->consume(1)); |
| 37 | $oParserState->consumeWhiteSpace(); |
| 38 | continue; |
| 39 | } elseif ($oParserState->comes(')')) { |
| 40 | $iNestingLevel--; |
| 41 | $oCalcList->addListComponent($oParserState->consume(1)); |
| 42 | $oParserState->consumeWhiteSpace(); |
| 43 | continue; |
| 44 | } |
| 45 | if ($iLastComponentType != CalcFunction::T_OPERAND) { |
| 46 | $oVal = Value::parsePrimitiveValue($oParserState); |
| 47 | $oCalcList->addListComponent($oVal); |
| 48 | $iLastComponentType = CalcFunction::T_OPERAND; |
| 49 | } else { |
| 50 | if (\in_array($oParserState->peek(), $aOperators)) { |
| 51 | if ($oParserState->comes('-') || $oParserState->comes('+')) { |
| 52 | if ($oParserState->peek(1, -1) != ' ' || !($oParserState->comes('- ') || $oParserState->comes('+ '))) { |
| 53 | throw new UnexpectedTokenException(" {$oParserState->peek()} ", $oParserState->peek(1, -1) . $oParserState->peek(2), 'literal', $oParserState->currentLine()); |
| 54 | } |
| 55 | } |
| 56 | $oCalcList->addListComponent($oParserState->consume(1)); |
| 57 | $iLastComponentType = CalcFunction::T_OPERATOR; |
| 58 | } else { |
| 59 | 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()); |
| 60 | } |
| 61 | } |
| 62 | $oParserState->consumeWhiteSpace(); |
| 63 | } |
| 64 | $oList->addListComponent($oCalcList); |
| 65 | $oParserState->consume(')'); |
| 66 | return new CalcFunction($sFunction, $oList, ',', $oParserState->currentLine()); |
| 67 | } |
| 68 | } |
| 69 |