[dartium] Dart half of ScriptValue refactoring.

Source/bindings/dart/DartScriptValue.h

Index: Source/bindings/dart/DartScriptValue.h
diff --git a/Source/bindings/dart/DartScriptValue.h b/Source/bindings/dart/DartScriptValue.h
index 4da4128a7c05f3d9e3e7cf26db55b611b1456440..e4da7d7d5a0fa0feaefe6ad0a9ccc8ad75b3ff82 100644
--- a/Source/bindings/dart/DartScriptValue.h
+++ b/Source/bindings/dart/DartScriptValue.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 Google Inc. All rights reserved.
+ * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -31,26 +31,110 @@
 #ifndef DartScriptValue_h
 #define DartScriptValue_h
 
-#include "bindings/dart/DartIsolateDestructionObserver.h"
-
+#include "bindings/common/AbstractScriptValue.h"
+#include "bindings/dart/V8Converter.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefPtr.h"
+#include "wtf/text/WTFString.h"
 #include <dart_api.h>
-#include <wtf/Noncopyable.h>
-#include <wtf/RefPtr.h>
 
 namespace WebCore {
 
-class DartScriptValue : public DartIsolateDestructionObserver {
+class JSONValue;
+class ScriptState;
+
+class DartScriptValue : public AbstractScriptValue {
     WTF_MAKE_NONCOPYABLE(DartScriptValue);
 public:
-    explicit DartScriptValue(Dart_Handle value);
-    ~DartScriptValue();
+    virtual ~DartScriptValue();
+
+    static PassRefPtr<DartScriptValue> create(Dart_Handle value)
+    {
+        return adoptRef(new DartScriptValue(value));
+    }
+
+    static PassRefPtr<DartScriptValue> create()
+    {
+        return adoptRef(new DartScriptValue());
+    }
+
+    bool isDart() const { return true; }
+
+    Dart_Handle dartValue() const { return m_value; }
+
+    v8::Handle<v8::Value> v8Value() const
+    {
+        // FIXMEMUTLIVM: Should not be converting v8 values. Major culprit is IDB. 
+        Dart_Handle exception = 0;
+        return V8Converter::toV8(m_value, exception);
+    }
+
+    bool equals(AbstractScriptValue* other) const 
+    {
+        if (!other->isDart())
+            return false;
+
+        DartScriptValue* dartOther = static_cast<DartScriptValue*>(other);
+        if (hasNoValue())
+            return dartOther->hasNoValue();
+        if (dartOther->hasNoValue())
+            return false;
+        return Dart_IdentityEquals(m_value, dartOther->m_value);
+    }  
 
-    Dart_PersistentHandle value() { return m_value; }
+    bool isFunction() const
+    {
+        ASSERT(!hasNoValue());
+        return Dart_IsClosure(m_value);
+    }
+
+    bool isNull() const
+    {
+        ASSERT(!hasNoValue());
+        return Dart_IsNull(m_value);
+    }
+
+    bool isUndefined() const
+    {
+        ASSERT(!hasNoValue());
+        return false;
+    }
+
+    bool isObject() const
+    {
+        ASSERT(!hasNoValue());
+        return true;
+    }
+
+    bool hasNoValue() const
+    {
+        return !m_value;
+    }
+
+    void clear()
+    {
+        m_value = 0;
+    }
+
+    bool getString(String& result) const;
+    String toString() const;
+
+    PassRefPtr<JSONValue> toJSONValue(ScriptState*) const;
 
 private:
-    Dart_PersistentHandle m_value;
+    Dart_Handle m_value;
+
+    explicit DartScriptValue()
+        : m_value(0)
+    {
+    }
+
+    explicit DartScriptValue(Dart_Handle value)
+        : m_value(value)
+    {
+    }
 };
 
-}
+} // namespace WebCore
 
 #endif // DartScriptValue_h