followup to 1eb2aed, care about 0 as an edge case for calc types

Author: ylafon

org/w3c/css/values/CssCalc.java

@@ -430,6 +430,14 @@ public CssPercentage getPercentage() throws InvalidParamException {
                 return val2.getPercentage();
             }
         }
+        if (computed_type == CssTypes.CSS_NUMBER) {
+            if (val1.getType() == CssTypes.CSS_NUMBER) {
+                return val1.getPercentage();
+            }
+            if (val2.getType() == CssTypes.CSS_NUMBER) {
+                return val2.getPercentage();
+            }
+        }
         throw new ClassCastException("unknown");
     }
 
@@ -454,6 +462,14 @@ public CssTime getTime() throws InvalidParamException {
                 return val2.getTime();
             }
         }
+        if (computed_type == CssTypes.CSS_NUMBER) {
+            if (val1.getType() == CssTypes.CSS_NUMBER) {
+                return val1.getTime();
+            }
+            if (val2.getType() == CssTypes.CSS_NUMBER) {
+                return val2.getTime();
+            }
+        }
         throw new ClassCastException("unknown");
     }
 
@@ -466,6 +482,14 @@ public CssAngle getAngle() throws InvalidParamException {
                 return val2.getAngle();
             }
         }
+        if (computed_type == CssTypes.CSS_NUMBER) {
+            if (val1.getType() == CssTypes.CSS_NUMBER) {
+                return val1.getAngle();
+            }
+            if (val2.getType() == CssTypes.CSS_NUMBER) {
+                return val2.getAngle();
+            }
+        }
         throw new ClassCastException("unknown");
     }
 
@@ -478,6 +502,14 @@ public CssFrequency getFrequency() throws InvalidParamException {
                 return val2.getFrequency();
             }
         }
+        if (computed_type == CssTypes.CSS_NUMBER) {
+            if (val1.getType() == CssTypes.CSS_NUMBER) {
+                return val1.getFrequency();
+            }
+            if (val2.getType() == CssTypes.CSS_NUMBER) {
+                return val2.getFrequency();
+            }
+        }
         throw new ClassCastException("unknown");
     }