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// Copyright 2015 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_BROWSER_API_USB_USB_EVENT_ROUTER_H_
#define EXTENSIONS_BROWSER_API_USB_USB_EVENT_ROUTER_H_
#include "base/macros.h"
#include "content/public/browser/browser_thread.h"
#include "device/usb/usb_service.h"
#include "extensions/browser/browser_context_keyed_api_factory.h"
#include "extensions/browser/event_router.h"
namespace device {
class UsbDevice;
}
namespace extensions {
// A BrowserContext-scoped object which is registered as an observer of the
// EventRouter and UsbService in order to generate device add/remove events.
class UsbEventRouter : public BrowserContextKeyedAPI,
public EventRouter::Observer,
public device::UsbService::Observer {
public:
// BrowserContextKeyedAPI implementation.
static BrowserContextKeyedAPIFactory<UsbEventRouter>* GetFactoryInstance();
private:
friend class BrowserContextKeyedAPIFactory<UsbEventRouter>;
explicit UsbEventRouter(content::BrowserContext* context);
~UsbEventRouter() override;
// BrowserContextKeyedAPI implementation.
static const char* service_name() { return "UsbEventRouter"; }
static const bool kServiceIsNULLWhileTesting = true;
// KeyedService implementation.
void Shutdown() override;
// EventRouter::Observer implementation.
void OnListenerAdded(const EventListenerInfo& details) override;
// UsbService::Observer implementation.
void OnDeviceAdded(scoped_refptr<device::UsbDevice> device) override;
void OnDeviceRemoved(scoped_refptr<device::UsbDevice> device) override;
// Broadcasts a device add or remove event for the given device.
void DispatchEvent(const std::string& event_name,
scoped_refptr<device::UsbDevice> device);
content::BrowserContext* const browser_context_;
ScopedObserver<device::UsbService, device::UsbService::Observer> observer_;
DISALLOW_COPY_AND_ASSIGN(UsbEventRouter);
};
template <>
void BrowserContextKeyedAPIFactory<
UsbEventRouter>::DeclareFactoryDependencies();
} // namespace extensions
#endif // EXTENSIONS_BROWSER_API_USB_USB_EVENT_ROUTER_H_
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