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// Copyright 2014 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_V8OBJECT_VAR_H_
#define CONTENT_RENDERER_PEPPER_V8OBJECT_VAR_H_
#include <string>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "content/common/content_export.h"
#include "ppapi/c/pp_instance.h"
#include "ppapi/shared_impl/var.h"
#include "v8/include/v8.h"
namespace content {
class PepperPluginInstanceImpl;
} // namespace content
namespace ppapi {
// V8ObjectVar -----------------------------------------------------------------
// Represents a JavaScript object Var. By itself, this represents random
// v8 objects that a given plugin (identified by the resource's module) wants to
// reference. If two different modules reference the same v8 object (like the
// "window" object), then there will be different V8ObjectVar's (and hence
// PP_Var IDs) for each module. This allows us to track all references owned by
// a given module and free them when the plugin exits independently of other
// plugins that may be running at the same time.
class CONTENT_EXPORT V8ObjectVar : public Var {
public:
V8ObjectVar(PP_Instance instance, v8::Local<v8::Object> v8_object);
// Var overrides.
V8ObjectVar* AsV8ObjectVar() override;
PP_VarType GetType() const override;
// Returns the underlying v8 object corresponding to this V8ObjectVar. This
// should only be used on the stack.
v8::Local<v8::Object> GetHandle() const;
// Notification that the instance was deleted, the internal reference will be
// zeroed out.
void InstanceDeleted();
// Possibly NULL if the object has outlived its instance.
content::PepperPluginInstanceImpl* instance() const { return instance_; }
// Helper function that converts a PP_Var to an object. This will return NULL
// if the PP_Var is not of object type or the object is invalid.
static scoped_refptr<V8ObjectVar> FromPPVar(PP_Var var);
private:
~V8ObjectVar() override;
content::PepperPluginInstanceImpl* instance_;
v8::Persistent<v8::Object> v8_object_;
DISALLOW_COPY_AND_ASSIGN(V8ObjectVar);
};
} // ppapi
#endif // CONTENT_RENDERER_PEPPER_V8OBJECT_VAR_H_
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