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// Copyright 2014 The Chromium Authors
// 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 "v8/include/v8-forward.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();
NativeHandler(const NativeHandler&) = delete;
NativeHandler& operator=(const NativeHandler&) = delete;
virtual ~NativeHandler();
// Initializes the native handler.
virtual void Initialize() = 0;
// Returns true if the handler has been initialized.
virtual bool IsInitialized() = 0;
// 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_;
};
} // namespace extensions
#endif // EXTENSIONS_RENDERER_NATIVE_HANDLER_H_
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