Handle arithmetic operators in Value

Author: raxbg

src/Value/CSSFunction.php

@@ -59,7 +59,7 @@ public static function parseName(ParserState $oParserState, $bIgnoreCase = false
      */
     public static function parseArgs(ParserState $oParserState)
     {
-        return Value::parseValue($oParserState, ['=', ' ', ',', '/', '*', '+', '-']);
+        return Value::parseValue($oParserState, ['=', ' ', ',']);
     }
 
     /**

src/Value/Value.php

@@ -156,7 +156,16 @@ public static function parsePrimitiveValue(ParserState $oParserState)
         } elseif ($oParserState->comes("U+")) {
             $oValue = self::parseUnicodeRangeValue($oParserState);
         } else {
-            $oValue = self::parseIdentifierOrFunction($oParserState);
+            $sNextChar = $oParserState->peek(1);
+            try {
+                $oValue = self::parseIdentifierOrFunction($oParserState);
+            } catch (UnexpectedTokenException $e) {
+                if (in_array($sNextChar, ['+', '-', '*', '/'])) {
+                    $oValue = $oParserState->consume(1);
+                } else {
+                    throw $e;
+                }
+            }
         }
         $oParserState->consumeWhiteSpace();
         return $oValue;

tests/ParserTest.php

@@ -1231,10 +1231,10 @@ public function lonelyImport()
     public function functionArithmeticInFile()
     {
         $oDoc = self::parsedStructureForFile('function-arithmetic', Settings::create()->withMultibyteSupport(true));
-        $sExpected = 'div {height: max(300,vh+10);}
-div {height: max(300,vh-10);}
-div {height: max(300,vh*10);}
-div {height: max(300,vh/10);}';
+        $sExpected = 'div {height: max(300,vh + 10);}
+div {height: max(300,vh - 10);}
+div {height: max(300,vh * 10);}
+div {height: max(300,vh / 10);}';
         self::assertSame($sExpected, $oDoc->render());
     }