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// Copyright (c) 2011 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_BROWSER_GEOLOCATION_WIN7_LOCATION_API_WIN_H_
#define CONTENT_BROWSER_GEOLOCATION_WIN7_LOCATION_API_WIN_H_
#include <windows.h>
#include <atlbase.h>
#include <atlcom.h>
#include <locationapi.h>
#include <sensors.h>
#include "base/time.h"
#include "base/win/scoped_com_initializer.h"
#include "content/common/content_export.h"
struct Geoposition;
// PropVariantToDouble
typedef HRESULT (WINAPI* PropVariantToDoubleFunction)
(REFPROPVARIANT propvarIn, DOUBLE *pdblRet);
class CONTENT_EXPORT Win7LocationApi {
public:
virtual ~Win7LocationApi();
// Attempts to load propsys.dll, initialise |location_| and requests the user
// for access to location information. Creates and returns ownership of an
// instance of Win7LocationApi if all succeed.
static Win7LocationApi* Create();
static Win7LocationApi* CreateForTesting(
PropVariantToDoubleFunction PropVariantToDouble_function,
ILocation* locator);
// Gives the best available position.
// Returns false if no valid position is available.
virtual void GetPosition(Geoposition* position);
// Changes the "accuracy" needed. Affects power levels of devices.
virtual bool SetHighAccuracy(bool acc);
protected:
Win7LocationApi();
private:
void Init(HINSTANCE prop_library,
PropVariantToDoubleFunction PropVariantToDouble_function,
ILocation* locator);
// Provides the best position fix if one is available.
// Does this by requesting a location report and querying it to obtain
// location information.
virtual bool GetPositionIfFixed(Geoposition* position);
// Ensure that COM has been initialized for this thread.
base::win::ScopedCOMInitializer com_initializer_;
// ILocation object that lets us communicate with the Location and
// Sensors platform.
CComPtr<ILocation> locator_;
// Holds the opened propsys.dll library that is passed on construction.
// This class is responsible for closing it.
HINSTANCE prop_lib_;
PropVariantToDoubleFunction PropVariantToDouble_function_;
DISALLOW_COPY_AND_ASSIGN(Win7LocationApi);
};
#endif // CONTENT_BROWSER_GEOLOCATION_WIN7_LOCATION_API_WIN_H_
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