| // 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 EXTENSIONS_RENDERER_NATIVE_HANDLER_H_ |
| #define EXTENSIONS_RENDERER_NATIVE_HANDLER_H_ |
| |
| #include "base/macros.h" |
| #include "v8/include/v8.h" |
| |
| namespace extensions { |
| |
| // NativeHandlers are intended to be used with a ModuleSystem. The ModuleSystem |
| // will assume ownership of the NativeHandler, and as a ModuleSystem is tied to |
| // a single v8::Context, this implies that NativeHandlers will also be tied to |
| // a single v8::Context. |
| // TODO(koz): Rename this to NativeJavaScriptModule. |
| class NativeHandler { |
| public: |
| NativeHandler(); |
| virtual ~NativeHandler(); |
| |
| // Create a new instance of the object this handler specifies. |
| virtual v8::Local<v8::Object> NewInstance() = 0; |
| |
| // Invalidate this object so it cannot be used any more. This is needed |
| // because it's possible for this to outlive its owner context. Invalidate |
| // must be called before this happens. |
| // |
| // Subclasses should override to invalidate their own V8 state. If they do |
| // they must call their superclass' Invalidate(). |
| // |
| // Invalidate() will be called on destruction, if it hasn't already been. |
| // Subclasses don't need to do it themselves. |
| virtual void Invalidate(); |
| |
| protected: |
| // Allow subclasses to query valid state. |
| bool is_valid() { return is_valid_; } |
| |
| private: |
| bool is_valid_; |
| |
| DISALLOW_COPY_AND_ASSIGN(NativeHandler); |
| }; |
| |
| } // namespace extensions |
| |
| #endif // EXTENSIONS_RENDERER_NATIVE_HANDLER_H_ |