Replace NPObject usage in ppapi with gin

content/renderer/pepper/plugin_object.h

 // Copyright (c) 2010 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.
 
 #ifndef CONTENT_RENDERER_PEPPER_PLUGIN_OBJECT_H_
 #define CONTENT_RENDERER_PEPPER_PLUGIN_OBJECT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/memory/weak_ptr.h"
+#include "gin/interceptor.h"
+#include "gin/wrappable.h"
+#include "ppapi/c/pp_var.h"
 
-struct PP_Var;
 struct PPP_Class_Deprecated;
-typedef struct NPObject NPObject;
-typedef struct _NPVariant NPVariant;
+
+namespace gin {
+  class Arguments;
+}  // namespace gin
 
 namespace content {
 
 class PepperPluginInstanceImpl;
 
 // A PluginObject is a JS-accessible object implemented by the plugin.
 //
 // In contrast, a var of type PP_VARTYPE_OBJECT is a reference to a JS object,
 // which might be implemented by the plugin (here) or by the JS engine.
-class PluginObject {
+class PluginObject : public gin::Wrappable<PluginObject>,
+                     public gin::NamedPropertyInterceptor {
  public:
+  static gin::WrapperInfo kWrapperInfo;
+
   virtual ~PluginObject();
 
+  // Returns the PluginObject which is contained in the given v8 object, or NULL
+  // if the object isn't backed by a PluginObject.
+  static PluginObject* FromV8Object(v8::Isolate* isolate,
+                                    v8::Handle<v8::Object> v8_object);
+
   // Allocates a new PluginObject and returns it as a PP_Var with a
   // refcount of 1.
   static PP_Var Create(PepperPluginInstanceImpl* instance,
                        const PPP_Class_Deprecated* ppp_class,
                        void* ppp_class_data);
 
-  PepperPluginInstanceImpl* instance() const { return instance_; }
+  // gin::NamedPropertyInterceptor
+  virtual v8::Local<v8::Value> GetNamedProperty(
+      v8::Isolate* isolate,
+      const std::string& property) OVERRIDE;
+  virtual std::vector<std::string> EnumerateNamedProperties(
+      v8::Isolate* isolate) OVERRIDE;
 
   const PPP_Class_Deprecated* ppp_class() { return ppp_class_; }
-  void* ppp_class_data() {
-    return ppp_class_data_;
-  };
+  void* ppp_class_data() { return ppp_class_data_; }
 
-  NPObject* GetNPObject() const;
-
-  // Returns true if the given var is an object implemented by the same plugin
-  // that owns the var object, and that the class matches. If it matches,
-  // returns true and places the class data into |*ppp_class_data| (which can
-  // optionally be NULL if no class data is desired).
-  static bool IsInstanceOf(NPObject* np_object,
-                           const PPP_Class_Deprecated* ppp_class,
-                           void** ppp_class_data);
-
-  // Converts the given NPObject to the corresponding ObjectVar.
-  //
-  // The given NPObject must be one corresponding to a PluginObject or this
-  // will crash. If the object is a PluginObject but the plugin has gone
-  // away (the object could still be alive because of a reference from JS),
-  // then the return value will be NULL.
-  static PluginObject* FromNPObject(NPObject* object);
-
-  // Allocates a plugin wrapper object and returns it as an NPObject. This is
-  // used internally only.
-  static NPObject* AllocateObjectWrapper();
+  // Called when the instance is destroyed.
+  void InstanceDeleted();
 
  private:
-  struct NPObjectWrapper;
-
-  // This object must be created using the CreateObject function of the which
-  // will set up the correct NPObject.
-  //
-  // The NPObjectWrapper (an NPObject) should already have the reference
-  // incremented on it, and this class will take ownership of that reference.
   PluginObject(PepperPluginInstanceImpl* instance,
-               NPObjectWrapper* object_wrapper,
                const PPP_Class_Deprecated* ppp_class,
                void* ppp_class_data);
 
+  // gin::Wrappable
+  virtual gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
+      v8::Isolate* isolate) OVERRIDE;
+
+  // Helper method to get named properties.
+  v8::Local<v8::Value> GetPropertyOrMethod(v8::Isolate* isolate,
+                                           PP_Var identifier_var);
+
+  void Call(const std::string& identifier, gin::Arguments* args);
+
   PepperPluginInstanceImpl* instance_;
 
-  // Holds a pointer to the NPObject wrapper backing the var. This class
-  // derives from NPObject and we hold a reference to it, so it must be
-  // refcounted. When the type is not an object, this value will be NULL.
-  //
-  // We don't actually own this pointer, it's the NPObject that actually
-  // owns us.
-  NPObjectWrapper* object_wrapper_;
-
   const PPP_Class_Deprecated* ppp_class_;
   void* ppp_class_data_;
 
+  base::WeakPtrFactory<PluginObject> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(PluginObject);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PLUGIN_OBJECT_H_