content/browser/geolocation/core_location_data_provider_mac.h

   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 // This file declares a CoreLocation data provider class that allows the
   6 // CoreLocation framework to run on the UI thread, since the Geolocation API's
   7 // providers all live on the IO thread
   8
   9 #ifndef CONTENT_BROWSER_GEOLOCATION_CORE_LOCATION_DATA_PROVIDER_H_
  10 #define CONTENT_BROWSER_GEOLOCATION_CORE_LOCATION_DATA_PROVIDER_H_
  11
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/scoped_nsobject.h"
  14 #include "content/public/browser/browser_thread.h"
  15 #include "content/public/common/geoposition.h"
  16
  17 #import <Foundation/Foundation.h>
  18
  19 @class CoreLocationWrapperMac;
  20
  21 namespace content {
  22 class CoreLocationProviderMac;
  23
  24 // Data provider class that allows CoreLocation to run in Chrome's UI thread
  25 // while existing on any of Chrome's threads (in this case the IO thread)
  26 class CoreLocationDataProviderMac
  27     : public base::RefCountedThreadSafe<CoreLocationDataProviderMac> {
  28  public:
  29   CoreLocationDataProviderMac();
  30
  31   bool StartUpdating(CoreLocationProviderMac* provider);
  32   void StopUpdating();
  33
  34   void UpdatePosition(Geoposition* position);
  35
  36  protected:
  37   friend class base::RefCountedThreadSafe<CoreLocationDataProviderMac>;
  38   ~CoreLocationDataProviderMac();
  39
  40  private:
  41   // These must execute in BrowserThread::UI
  42   void StartUpdatingTask();
  43   void StopUpdatingTask();
  44   // This must execute in the origin thread (IO thread)
  45   void PositionUpdated(Geoposition position);
  46
  47   // The wrapper class that supplies this class with position data
  48   scoped_nsobject<CoreLocationWrapperMac> wrapper_;
  49   // The LocationProviderBase class that should receive position data
  50   CoreLocationProviderMac* provider_;
  51 };
  52
  53 }  // namespace content
  54
  55 #endif  // CONTENT_BROWSER_GEOLOCATION_CORE_LOCATION_DATA_PROVIDER_H_