matthiasblaesing commented on code in PR #8409:
URL: https://github.com/apache/netbeans/pull/8409#discussion_r2094093708


##########
ide/css.lib/src/org/netbeans/modules/css/lib/Css3.g:
##########
@@ -456,13 +456,32 @@ mediaType
 
 mediaExpression
     :
-    (LPAREN) => (LPAREN ws? mediaFeature mediaFeatureValue? ws? RPAREN)
+    (LPAREN) => (LPAREN ws? mediaFeatureType ws? RPAREN)
     | (HASH) => {isCssPreprocessorSource()}? sass_interpolation_expression_var
     ;
 
+mediaComparisonOperator
+    : 
+    OPEQ | LESS | LESS_OR_EQ | GREATER | GREATER_OR_EQ
+    ;    
+
+mediaRangeExplicitValue
+    : LENGTH | EMS | REM | RESOLUTION

Review Comment:
   I think there are potential values missing:
   
   ```suggestion
       : LENGTH | EXS | EMS | REM | DIMENSION | RESOLUTION
   ```



##########
ide/css.lib/src/org/netbeans/modules/css/lib/Css3.g:
##########
@@ -456,13 +456,32 @@ mediaType
 
 mediaExpression
     :
-    (LPAREN) => (LPAREN ws? mediaFeature mediaFeatureValue? ws? RPAREN)
+    (LPAREN) => (LPAREN ws? mediaFeatureType ws? RPAREN)
     | (HASH) => {isCssPreprocessorSource()}? sass_interpolation_expression_var
     ;
 
+mediaComparisonOperator
+    : 
+    OPEQ | LESS | LESS_OR_EQ | GREATER | GREATER_OR_EQ
+    ;    
+
+mediaRangeExplicitValue
+    : LENGTH | EMS | REM | RESOLUTION
+    ;
+
+mediaFeatureType
+    : 
+    mediaFeature (ws? (COLON | mediaComparisonOperator) ws? 
(mediaRangeExplicitValue | mediaFeatureValue))?
+    | mediaFeatureRangeContext
+;
+
+mediaFeatureRangeContext
+    :
+    (mediaRangeExplicitValue | mediaFeatureValue) ws? mediaComparisonOperator 
ws? mediaFeature (ws? mediaComparisonOperator ws? (mediaRangeExplicitValue | 
mediaFeatureValue))?

Review Comment:
   This grammar allows:
   
   ```css
   @media (30em > width < 50em) {}
   ```
   
   But that is explicitly not supported by the CSS grammar.



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