1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_RENDERER_PEPPER_V8OBJECT_VAR_H_ 6 #define CONTENT_RENDERER_PEPPER_V8OBJECT_VAR_H_ 7 8 #include <string> 9 10 #include "base/compiler_specific.h" 11 #include "content/common/content_export.h" 12 #include "ppapi/c/pp_instance.h" 13 #include "ppapi/shared_impl/var.h" 14 #include "v8/include/v8.h" 15 16 namespace content { 17 class PepperPluginInstanceImpl; 18 } // namespace content 19 20 namespace ppapi { 21 22 // V8ObjectVar ----------------------------------------------------------------- 23 24 // Represents a JavaScript object Var. By itself, this represents random 25 // v8 objects that a given plugin (identified by the resource's module) wants to 26 // reference. If two different modules reference the same v8 object (like the 27 // "window" object), then there will be different V8ObjectVar's (and hence 28 // PP_Var IDs) for each module. This allows us to track all references owned by 29 // a given module and free them when the plugin exits independently of other 30 // plugins that may be running at the same time. 31 class CONTENT_EXPORT V8ObjectVar : public Var { 32 public: 33 V8ObjectVar(PP_Instance instance, v8::Handle<v8::Object> v8_object); 34 35 // Var overrides. 36 virtual V8ObjectVar* AsV8ObjectVar() OVERRIDE; 37 virtual PP_VarType GetType() const OVERRIDE; 38 39 // Returns the underlying v8 object corresponding to this V8ObjectVar. This 40 // should only be used on the stack. 41 v8::Local<v8::Object> GetHandle() const; 42 43 // Notification that the instance was deleted, the internal reference will be 44 // zeroed out. 45 void InstanceDeleted(); 46 47 // Possibly NULL if the object has outlived its instance. instance()48 content::PepperPluginInstanceImpl* instance() const { return instance_; } 49 50 // Helper function that converts a PP_Var to an object. This will return NULL 51 // if the PP_Var is not of object type or the object is invalid. 52 static scoped_refptr<V8ObjectVar> FromPPVar(PP_Var var); 53 54 private: 55 virtual ~V8ObjectVar(); 56 57 content::PepperPluginInstanceImpl* instance_; 58 59 v8::Persistent<v8::Object> v8_object_; 60 61 DISALLOW_COPY_AND_ASSIGN(V8ObjectVar); 62 }; 63 64 } // ppapi 65 66 #endif // CONTENT_RENDERER_PEPPER_V8OBJECT_VAR_H_ 67