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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 <set> | 8 #include <set> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
| 11 #include "base/id_map.h" |
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 base { | 22 namespace base { |
22 class Thread; | 23 class Thread; |
23 } | 24 } |
24 | 25 |
25 namespace device_orientation { | 26 namespace device_orientation { |
26 | 27 |
27 class ProviderImpl : public Provider { | 28 class ProviderImpl : public Provider { |
28 public: | 29 public: |
29 typedef DataFetcher* (*DataFetcherFactory)(); | 30 typedef DataFetcher* (*DataFetcherFactory)(); |
30 | 31 |
31 // Create a ProviderImpl that uses the NULL-terminated factories array to find | 32 // Create a ProviderImpl that uses the NULL-terminated factories array to find |
32 // a DataFetcher that can provide orientation data. | 33 // a DataFetcher that can provide data. |
33 CONTENT_EXPORT ProviderImpl(const DataFetcherFactory factories[]); | 34 CONTENT_EXPORT ProviderImpl(const DataFetcherFactory factories[]); |
34 | 35 |
35 // From Provider. | 36 // From Provider. |
36 virtual void AddObserver(Observer* observer) OVERRIDE; | 37 virtual void AddObserver(Observer* observer) OVERRIDE; |
37 virtual void RemoveObserver(Observer* observer) OVERRIDE; | 38 virtual void RemoveObserver(Observer* observer) OVERRIDE; |
38 | 39 |
39 private: | 40 private: |
40 virtual ~ProviderImpl(); | 41 virtual ~ProviderImpl(); |
41 | 42 |
42 // Starts or Stops the provider. Called from creator_loop_. | 43 // Starts or Stops the provider. Called from creator_loop_. |
43 void Start(); | 44 void Start(); |
44 void Stop(); | 45 void Stop(); |
45 | 46 |
| 47 // Method for adding a type of observer to poll. Runs on the polling_thread_. |
| 48 void DoAddObserverType(DeviceData::DeviceDataType device_data_type); |
| 49 void ScheduleDoAddObserverType(DeviceData::DeviceDataType device_data_type); |
| 50 |
46 // Method for finding a suitable DataFetcher and starting the polling. | 51 // Method for finding a suitable DataFetcher and starting the polling. |
47 // Runs on the polling_thread_. | 52 // Runs on the polling_thread_. |
48 void DoInitializePollingThread( | 53 void DoInitializePollingThread( |
49 const std::vector<DataFetcherFactory>& factories); | 54 const std::vector<DataFetcherFactory>& factories, |
50 void ScheduleInitializePollingThread(); | 55 DeviceData::DeviceDataType device_data_type); |
| 56 void ScheduleInitializePollingThread( |
| 57 DeviceData::DeviceDataType device_data_type); |
51 | 58 |
52 // Method for polling a DataFetcher. Runs on the polling_thread_. | 59 // Method for polling a DataFetcher. Runs on the polling_thread_. |
53 void DoPoll(); | 60 void DoPoll(); |
54 void ScheduleDoPoll(); | 61 void ScheduleDoPoll(); |
55 | 62 |
56 // Method for notifying observers of an orientation update. | 63 // Method for notifying observers of a data update. |
57 // Runs on the creator_thread_. | 64 // Runs on the creator_thread_. |
58 void DoNotify(const Orientation& orientation); | 65 void DoNotify(const DeviceData* device_data, |
59 void ScheduleDoNotify(const Orientation& orientation); | 66 DeviceData::DeviceDataType device_data_type); |
60 | 67 void ScheduleDoNotify(const DeviceData* device_data, |
61 static bool SignificantlyDifferent(const Orientation& orientation1, | 68 DeviceData::DeviceDataType device_data_type); |
62 const Orientation& orientation2); | |
63 | 69 |
64 enum { kDesiredSamplingIntervalMs = 100 }; | 70 enum { kDesiredSamplingIntervalMs = 100 }; |
65 base::TimeDelta SamplingInterval() const; | 71 base::TimeDelta SamplingInterval() const; |
66 | 72 |
67 // The Message Loop on which this object was created. | 73 // The Message Loop on which this object was created. |
68 // Typically the I/O loop, but may be something else during testing. | 74 // Typically the I/O loop, but may be something else during testing. |
69 MessageLoop* creator_loop_; | 75 MessageLoop* creator_loop_; |
70 | 76 |
71 // Members below are only to be used from the creator_loop_. | 77 // Members below are only to be used from the creator_loop_. |
72 std::vector<DataFetcherFactory> factories_; | 78 std::vector<DataFetcherFactory> factories_; |
73 std::set<Observer*> observers_; | 79 std::set<Observer*> observers_; |
74 Orientation last_notification_; | 80 IDMap<DeviceData, IDMapOwnPointer> last_notifications_map_; |
75 | 81 |
76 // When polling_thread_ is running, members below are only to be used | 82 // When polling_thread_ is running, members below are only to be used |
77 // from that thread. | 83 // from that thread. |
78 scoped_ptr<DataFetcher> data_fetcher_; | 84 scoped_ptr<DataFetcher> data_fetcher_; |
79 Orientation last_orientation_; | 85 scoped_ptr<IDMap<DeviceData, IDMapOwnPointer> > last_device_data_map_; |
80 base::WeakPtrFactory<ProviderImpl> weak_factory_; | 86 base::WeakPtrFactory<ProviderImpl> weak_factory_; |
| 87 std::set<DeviceData::DeviceDataType> observer_types_; |
81 | 88 |
82 // Polling is done on this background thread. | 89 // Polling is done on this background thread. |
83 scoped_ptr<base::Thread> polling_thread_; | 90 scoped_ptr<base::Thread> polling_thread_; |
84 }; | 91 }; |
85 | 92 |
86 } // namespace device_orientation | 93 } // namespace device_orientation |
87 | 94 |
88 #endif // CONTENT_BROWSER_DEVICE_ORIENTATION_PROVIDER_IMPL_H_ | 95 #endif // CONTENT_BROWSER_DEVICE_ORIENTATION_PROVIDER_IMPL_H_ |
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