Make JsEngine::Evaluate() return a wrapper for v8::Value to accessdifferent variable types easily

include/AdblockPlus/JsValue.h

Index: include/AdblockPlus/JsValue.h
===================================================================
new file mode 100644
--- /dev/null
+++ b/include/AdblockPlus/JsValue.h
@@ -0,0 +1,63 @@
+#ifndef ADBLOCKPLUS_JS_VALUE_H
+#define ADBLOCKPLUS_JS_VALUE_H
+
+#include <vector>
+#include <v8.h>
+#ifdef _MSC_VER
+#include <memory>
+#else
+#include <tr1/memory>
+#endif
+
+namespace AdblockPlus
+{
+  class JsEngine;
+  class JsValue;
+
+  typedef std::tr1::shared_ptr<JsValue> JsValuePtr;
+  typedef std::vector<AdblockPlus::JsValuePtr> JsValueList;
+
+  class JsValue
+  {
+    friend class JsEngine;
+    friend class JsObject;
+  public:
+    virtual ~JsValue();
+
+    bool IsUndefined() const;
+    bool IsNull() const;
+    bool IsString() const;
+    bool IsNumber() const;
+    bool IsBool() const;
+    bool IsObject() const;
+    bool IsArray() const;
+    bool IsFunction() const;
+    std::string AsString() const;
+    int64_t AsInt() const;
+    bool AsBool() const;
+    JsValueList AsList() const;
+    JsValuePtr GetProperty(const std::string& name) const;
+    void SetProperty(const std::string& name, const std::string& val);
+    void SetProperty(const std::string& name, int64_t val);
+    void SetProperty(const std::string& name, bool val);
+    inline void SetProperty(const std::string& name, const char* val)
+    {
+      SetProperty(name, std::string(val));
+    }
+    inline void SetProperty(const std::string& name, int val)
+    {
+      SetProperty(name, static_cast<int64_t>(val));
+    }
+    std::string GetClassName() const;
+    JsValuePtr Call(const JsValueList& params = JsValueList(),
+        AdblockPlus::JsValuePtr thisPtr = AdblockPlus::JsValuePtr()) const;
+  protected:
+    JsValue(JsEngine& jsEngine, v8::Handle<v8::Value> value);
+    void SetProperty(const std::string& name, v8::Handle<v8::Value> val);
+
+    JsEngine& jsEngine;
+    v8::Persistent<v8::Value> value;
+  };
+}
+
+#endif