introducing a special function type for calc

Author: rbri

src/main/java/com/gargoylesoftware/css/dom/CSSValueImpl.java

@@ -372,6 +372,7 @@ public CSSPrimitiveValueType getPrimitiveType() {
                 case UNICODERANGE:
                 case SUB_EXPRESSION:
                 case FUNCTION:
+                case FUNCTION_CALC:
                     return CSSPrimitiveValueType.CSS_STRING;
                 case DIMENSION:
                     return CSSPrimitiveValueType.CSS_DIMENSION;
@@ -445,7 +446,8 @@ public String getStringValue() throws DOMException {
             }
 
             // for rgba values we are using this type
-            if (lu.getLexicalUnitType() == LexicalUnitType.FUNCTION) {
+            if (lu.getLexicalUnitType() == LexicalUnitType.FUNCTION
+                    || lu.getLexicalUnitType() == LexicalUnitType.FUNCTION_CALC) {
                 return lu.toString();
             }
         }

src/main/java/com/gargoylesoftware/css/parser/AbstractCSSParser.java

@@ -766,6 +766,9 @@ else if ("rect(".equalsIgnoreCase(funct)) {
         else if ("rgb(".equalsIgnoreCase(funct)) {
             return LexicalUnitImpl.createRgbColor(prev, params);
         }
+        else if ("calc(".equalsIgnoreCase(funct)) {
+            return LexicalUnitImpl.createCalc(prev, params);
+        }
         return LexicalUnitImpl.createFunction(
             prev,
             funct.substring(0, funct.length() - 1),

src/main/java/com/gargoylesoftware/css/parser/LexicalUnit.java

@@ -17,7 +17,7 @@
 /**
  * Lexical unit of css values.
  *
- * @author Ronald brill
+ * @author Ronald Brill
  */
 public interface LexicalUnit {
 
@@ -73,6 +73,7 @@ enum LexicalUnitType {
         UNICODERANGE,
         SUB_EXPRESSION,
         FUNCTION,
+        FUNCTION_CALC,
         DIMENSION
     }
 

src/main/java/com/gargoylesoftware/css/parser/LexicalUnitImpl.java

@@ -434,6 +434,7 @@ public String getCssText() {
                 }
                 break;
             case FUNCTION:
+            case FUNCTION_CALC:
                 final String functName = getFunctionName();
                 if (null != functName) {
                     sb.append(functName);
@@ -698,6 +699,7 @@ public String toDebugString() {
                     .append(")");
                 break;
             case FUNCTION:
+            case FUNCTION_CALC:
                 sb.append("FUNCTION(")
                     .append(getFunctionName())
                     .append("(");
@@ -1027,6 +1029,15 @@ public static LexicalUnit createRgbColor(final LexicalUnit prev, final LexicalUn
         return new LexicalUnitImpl(prev, LexicalUnitType.RGBCOLOR, "rgb", params);
     }
 
+    /**
+     * @param prev the previous LexicalUnit
+     * @param params the params
+     * @return lexical unit with type calc
+     */
+    public static LexicalUnit createCalc(final LexicalUnit prev, final LexicalUnit params) {
+        return new LexicalUnitImpl(prev, LexicalUnitType.FUNCTION_CALC, "calc", params);
+    }
+
     /**
      * @param prev the previous LexicalUnit
      * @param name the name

src/test/java/com/gargoylesoftware/css/parser/CSS3ParserTest.java

@@ -1053,7 +1053,7 @@ public void calcPlus() throws Exception {
 
         final CSSValueImpl value = (CSSValueImpl) style.getPropertyCSSValue(name);
         LexicalUnitImpl unit  = (LexicalUnitImpl) value.getValue();
-        Assert.assertEquals(LexicalUnitType.FUNCTION, unit.getLexicalUnitType());
+        Assert.assertEquals(LexicalUnitType.FUNCTION_CALC, unit.getLexicalUnitType());
         Assert.assertEquals("calc", unit.getFunctionName());
 
         unit  = (LexicalUnitImpl) unit.getParameters();
@@ -1093,7 +1093,7 @@ public void calcSum() throws Exception {
 
         final CSSValueImpl value = (CSSValueImpl) style.getPropertyCSSValue(name);
         LexicalUnitImpl unit  = (LexicalUnitImpl) value.getValue();
-        Assert.assertEquals(LexicalUnitType.FUNCTION, unit.getLexicalUnitType());
+        Assert.assertEquals(LexicalUnitType.FUNCTION_CALC, unit.getLexicalUnitType());
         Assert.assertEquals("calc", unit.getFunctionName());
 
         unit  = (LexicalUnitImpl) unit.getParameters();
@@ -1217,7 +1217,7 @@ public void calcComplex() throws Exception {
 
         final CSSValueImpl value = (CSSValueImpl) style.getPropertyCSSValue(name);
         LexicalUnitImpl unit  = (LexicalUnitImpl) value.getValue();
-        Assert.assertEquals(LexicalUnitType.FUNCTION, unit.getLexicalUnitType());
+        Assert.assertEquals(LexicalUnitType.FUNCTION_CALC, unit.getLexicalUnitType());
         Assert.assertEquals("calc", unit.getFunctionName());
 
         unit  = (LexicalUnitImpl) unit.getParameters();
@@ -1264,7 +1264,7 @@ public void calcCalc() throws Exception {
 
         final CSSValueImpl value = (CSSValueImpl) style.getPropertyCSSValue(name);
         LexicalUnitImpl unit  = (LexicalUnitImpl) value.getValue();
-        Assert.assertEquals(LexicalUnitType.FUNCTION, unit.getLexicalUnitType());
+        Assert.assertEquals(LexicalUnitType.FUNCTION_CALC, unit.getLexicalUnitType());
         Assert.assertEquals("calc", unit.getFunctionName());
 
         unit  = (LexicalUnitImpl) unit.getParameters();