[WIP] Add support for CSSValue-> CSSLengthValue and CSSTranslation

third_party/WebKit/Source/core/css/cssom/CSSLengthValue.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/cssom/CSSLengthValue.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/css/CSSPrimitiveValueUnitTrie.h"
 #include "core/css/cssom/CSSCalcLength.h"
 #include "core/css/cssom/CSSSimpleLength.h"
 #include "core/css/cssom/CalcDictionary.h"
 #include "wtf/HashMap.h"
 
 namespace blink {
 
+CSSLengthValue* CSSLengthValue::fromCSSValue(const CSSValue& value)
+{
+    if (!value.isPrimitiveValue())
+        return nullptr;
+
+    const CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(value);
+    if (!primitiveValue.isLength())
+        return nullptr;
+
+    if (!primitiveValue.isCalculated())
+        return CSSSimpleLength::create(primitiveValue.getDoubleValue(), primitiveValue.typeWithCalcResolved());
+
+    return CSSCalcLength::fromCSSValue(value);
+}
+
 CSSPrimitiveValue::UnitType CSSLengthValue::unitFromName(const String& name)
 {
     if (equalIgnoringASCIICase(name, "percent") || name == "%") {
         return CSSPrimitiveValue::UnitType::Percentage;
     }
     if (name.is8Bit())
         return lookupCSSPrimitiveValueUnit(name.characters8(), name.length());
     return lookupCSSPrimitiveValueUnit(name.characters16(), name.length());
 }
 
@@ skipping 24 matching lines @@
 
 CSSLengthValue* CSSLengthValue::subtract(const CSSLengthValue* other, ExceptionState& exceptionState)
 {
     if (type() == other->type() || type() == CalcLengthType)
         return subtractInternal(other, exceptionState);
 
     CSSCalcLength* result = CSSCalcLength::create(this, exceptionState);
     return result->subtract(other, exceptionState);
 }
 
-CSSLengthValue* CSSLengthValue::multiply(double x, ExceptionState& exceptionState)
+CSSLengthValue* CSSLengthValue::multiply(double x, ExceptionState&)
 {
-    return multiplyInternal(x, exceptionState);
+    return multiplyInternal(x);
 }
 
-CSSLengthValue* CSSLengthValue::divide(double x, ExceptionState& exceptionState)
+CSSLengthValue* CSSLengthValue::divide(double x, ExceptionState&)
 {
-    return divideInternal(x, exceptionState);
+    return divideInternal(x);
 }
 
 CSSLengthValue* CSSLengthValue::addInternal(const CSSLengthValue*, ExceptionState&)
 {
     NOTREACHED();
     return nullptr;
 }
 
 CSSLengthValue* CSSLengthValue::subtractInternal(const CSSLengthValue*, ExceptionState&)
 {
     NOTREACHED();
     return nullptr;
 }
 
-CSSLengthValue* CSSLengthValue::multiplyInternal(double, ExceptionState&)
+CSSLengthValue* CSSLengthValue::multiplyInternal(double)
 {
     NOTREACHED();
     return nullptr;
 }
 
-CSSLengthValue* CSSLengthValue::divideInternal(double, ExceptionState&)
+CSSLengthValue* CSSLengthValue::divideInternal(double)
 {
     NOTREACHED();
     return nullptr;
 }
 
 } // namespace blink