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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CONTENT_BROWSER_DEVICE_ORIENTATION_PROVIDER_IMPL_H_ | 5 #ifndef CONTENT_BROWSER_DEVICE_ORIENTATION_PROVIDER_IMPL_H_ |
6 #define CONTENT_BROWSER_DEVICE_ORIENTATION_PROVIDER_IMPL_H_ | 6 #define CONTENT_BROWSER_DEVICE_ORIENTATION_PROVIDER_IMPL_H_ |
7 | 7 |
| 8 #include <map> |
8 #include <set> | 9 #include <set> |
9 #include <vector> | 10 #include <vector> |
10 | 11 |
11 #include "base/memory/scoped_ptr.h" | 12 #include "base/memory/scoped_ptr.h" |
12 #include "base/memory/weak_ptr.h" | 13 #include "base/memory/weak_ptr.h" |
13 #include "base/time.h" | 14 #include "base/time.h" |
14 #include "content/browser/device_orientation/data_fetcher.h" | 15 #include "content/browser/device_orientation/data_fetcher.h" |
15 #include "content/browser/device_orientation/orientation.h" | 16 #include "content/browser/device_orientation/device_data.h" |
16 #include "content/browser/device_orientation/provider.h" | 17 #include "content/browser/device_orientation/provider.h" |
17 #include "content/common/content_export.h" | 18 #include "content/common/content_export.h" |
18 | 19 |
19 class MessageLoop; | 20 class MessageLoop; |
20 | 21 |
21 namespace device_orientation { | 22 namespace device_orientation { |
22 | 23 |
23 class ProviderImpl : public Provider { | 24 class ProviderImpl : public Provider { |
24 public: | 25 public: |
25 typedef DataFetcher* (*DataFetcherFactory)(); | 26 typedef DataFetcher* (*DataFetcherFactory)(); |
26 | 27 |
27 // Create a ProviderImpl that uses the factory to create a DataFetcher that | 28 // Create a ProviderImpl that uses the factory to create a DataFetcher that |
28 // can provide orientation data. A NULL DataFetcherFactory indicates that | 29 // can provide data. A NULL DataFetcherFactory indicates that there are no |
29 // there are no DataFetchers for this OS. | 30 // DataFetchers for this OS. |
30 CONTENT_EXPORT ProviderImpl(DataFetcherFactory factory); | 31 CONTENT_EXPORT ProviderImpl(DataFetcherFactory factory); |
31 | 32 |
32 // From Provider. | 33 // From Provider. |
33 virtual void AddObserver(Observer* observer) OVERRIDE; | 34 virtual void AddObserver(Observer* observer) OVERRIDE; |
34 virtual void RemoveObserver(Observer* observer) OVERRIDE; | 35 virtual void RemoveObserver(Observer* observer) OVERRIDE; |
35 | 36 |
36 private: | 37 private: |
37 class PollingThread; | 38 class PollingThread; |
38 | 39 |
39 virtual ~ProviderImpl(); | 40 virtual ~ProviderImpl(); |
40 | 41 |
41 // Starts or Stops the provider. Called from creator_loop_. | 42 // Starts or Stops the provider. Called from creator_loop_. |
42 void Start(); | 43 void Start(DeviceData::Type type); |
43 void Stop(); | 44 void Stop(); |
44 | 45 |
45 void ScheduleInitializePollingThread(); | 46 void ScheduleInitializePollingThread(DeviceData::Type device_data_type); |
| 47 void ScheduleDoAddPollingDataType(DeviceData::Type type); |
46 | 48 |
47 // Method for notifying observers of an orientation update. | 49 // Method for notifying observers of a data update. |
48 // Runs on the creator_thread_. | 50 // Runs on the creator_thread_. |
49 void DoNotify(const Orientation& orientation); | 51 void DoNotify(const DeviceData* device_data, |
| 52 DeviceData::Type device_data_type); |
| 53 |
| 54 static bool ShouldFireEvent(const DeviceData* old_data, |
| 55 const DeviceData* new_data, DeviceData::Type device_data_type); |
50 | 56 |
51 // The Message Loop on which this object was created. | 57 // The Message Loop on which this object was created. |
52 // Typically the I/O loop, but may be something else during testing. | 58 // Typically the I/O loop, but may be something else during testing. |
53 MessageLoop* creator_loop_; | 59 MessageLoop* creator_loop_; |
54 | 60 |
55 // Members below are only to be used from the creator_loop_. | 61 // Members below are only to be used from the creator_loop_. |
56 DataFetcherFactory factory_; | 62 DataFetcherFactory factory_; |
57 std::set<Observer*> observers_; | 63 std::set<Observer*> observers_; |
58 Orientation last_notification_; | 64 std::map<DeviceData::Type, scoped_refptr<const DeviceData> > |
| 65 last_notifications_map_; |
59 | 66 |
| 67 // When polling_thread_ is running, members below are only to be used |
| 68 // from that thread. |
60 base::WeakPtrFactory<ProviderImpl> weak_factory_; | 69 base::WeakPtrFactory<ProviderImpl> weak_factory_; |
61 | 70 |
62 // Polling is done on this background thread. PollingThread is owned by | 71 // Polling is done on this background thread. PollingThread is owned by |
63 // the ProviderImpl object. But its deletion doesn't happen synchronously | 72 // the ProviderImpl object. But its deletion doesn't happen synchronously |
64 // along with deletion of the ProviderImpl. Thus this should be a raw | 73 // along with deletion of the ProviderImpl. Thus this should be a raw |
65 // pointer instead of scoped_ptr. | 74 // pointer instead of scoped_ptr. |
66 PollingThread* polling_thread_; | 75 PollingThread* polling_thread_; |
67 }; | 76 }; |
68 | 77 |
69 } // namespace device_orientation | 78 } // namespace device_orientation |
70 | 79 |
71 #endif // CONTENT_BROWSER_DEVICE_ORIENTATION_PROVIDER_IMPL_H_ | 80 #endif // CONTENT_BROWSER_DEVICE_ORIENTATION_PROVIDER_IMPL_H_ |
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