1 // Copyright (c) 2012 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 CHROME_RENDERER_EXTENSIONS_NATIVE_HANDLER_H_ 6 #define CHROME_RENDERER_EXTENSIONS_NATIVE_HANDLER_H_ 7 8 #include "base/basictypes.h" 9 #include "v8/include/v8.h" 10 11 namespace extensions { 12 13 // NativeHandlers are intended to be used with a ModuleSystem. The ModuleSystem 14 // will assume ownership of the NativeHandler, and as a ModuleSystem is tied to 15 // a single v8::Context, this implies that NativeHandlers will also be tied to 16 // a single v8::Context. 17 // TODO(koz): Rename this to NativeJavaScriptModule. 18 class NativeHandler { 19 public: 20 NativeHandler(); 21 virtual ~NativeHandler(); 22 23 // Create a new instance of the object this handler specifies. 24 virtual v8::Handle<v8::Object> NewInstance() = 0; 25 26 // Invalidate this object so it cannot be used any more. This is needed 27 // because it's possible for this to outlive its owner context. Invalidate 28 // must be called before this happens. 29 // 30 // Subclasses should override to invalidate their own V8 state. If they do 31 // they must call their superclass' Invalidate(). 32 virtual void Invalidate(); 33 34 protected: 35 // Allow subclasses to query valid state. 36 bool is_valid() { return is_valid_; } 37 38 private: 39 bool is_valid_; 40 41 DISALLOW_COPY_AND_ASSIGN(NativeHandler); 42 }; 43 44 } // extensions 45 46 #endif // CHROME_RENDERER_EXTENSIONS_NATIVE_HANDLER_H_ 47
