Fix an issue in parsing calc functions with whitespace after the operands/operators

Author: raxbg

lib/Sabberworm/CSS/Value/CalcFunction.php

@@ -21,10 +21,12 @@ public static function parse(ParserState $oParserState) {
 			if ($oParserState->comes('(')) {
 				$iNestingLevel++;
 				$oCalcList->addListComponent($oParserState->consume(1));
+				$oParserState->consumeWhiteSpace();
 				continue;
 			} else if ($oParserState->comes(')')) {
 				$iNestingLevel--;
 				$oCalcList->addListComponent($oParserState->consume(1));
+				$oParserState->consumeWhiteSpace();
 				continue;
 			}
 			if ($iLastComponentType != CalcFunction::T_OPERAND) {
@@ -53,6 +55,7 @@ public static function parse(ParserState $oParserState) {
 					);
 				}
 			}
+			$oParserState->consumeWhiteSpace();
 		}
 		$oList->addListComponent($oCalcList);
 		$oParserState->consume(')');

tests/Sabberworm/CSS/ParserTest.php

@@ -404,7 +404,8 @@ function testCalcInFile() {
 		$oDoc = $this->parsedStructureForFile('calc', Settings::create()->withMultibyteSupport(true));
 		$sExpected = 'div {width: calc(100% / 4);}
 div {margin-top: calc(-120% - 4px);}
-div {height: -webkit-calc(9 / 16 * 100%) !important;width: -moz-calc(( 50px - 50% ) * 2);}';
+div {height: -webkit-calc(9 / 16 * 100%) !important;width: -moz-calc(( 50px - 50% ) * 2);}
+div {width: calc(50% - ( ( 4% ) * .5 ));}';
 		$this->assertSame($sExpected, $oDoc->render());
 	}
 

tests/files/calc.css

@@ -4,3 +4,4 @@ div {
 	height: -webkit-calc(9/16 * 100%)!important;
 	width: -moz-calc((50px - 50%)*2);
 }
+div { width: calc(50% - ( ( 4% ) * 0.5 ) ); }