Index: content/browser/geolocation/location_api_adapter_android.h |
diff --git a/content/browser/geolocation/location_api_adapter_android.h b/content/browser/geolocation/location_api_adapter_android.h |
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+// Copyright (c) 2012 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_LOCATION_API_ADAPTER_ANDROID_H_ |
+#define CONTENT_BROWSER_GEOLOCATION_LOCATION_API_ADAPTER_ANDROID_H_ |
+ |
+#include "base/android/jni_weak_ref.h" |
+#include "base/android/scoped_java_ref.h" |
+#include "base/memory/ref_counted.h" |
+#include "base/memory/singleton.h" |
+#include "base/synchronization/lock.h" |
+ |
+namespace base { |
+class SingleThreadTaskRunner; |
+} |
+ |
+namespace content { |
+class LocationProviderAndroid; |
+struct Geoposition; |
+ |
+// Interacts with JNI and reports back to LocationProviderAndroid. This class |
+// creates a LocationProvider java object and listens for updates. |
+// The simplified flow is: |
+// - GeolocationProvider runs in a Geolocation Thread and fetches geolocation |
+// data from a LocationProvider. |
+// - LocationProviderAndroid accesses a singleton AndroidLocationApiAdapter. |
+// - AndroidLocationApiAdapter calls via JNI and uses the main thread Looper |
+// in the java side to listen for location updates. We then bounce these |
+// updates to the Geolocation thread. |
+// |
+// Note that AndroidLocationApiAdapter is a singleton and there's at most only |
+// one LocationProviderAndroid that has called Start(). |
+class AndroidLocationApiAdapter { |
+ public: |
+ // Starts the underlying location provider, returns true if successful. |
+ // Called on the Geolocation thread. |
+ bool Start(LocationProviderAndroid* location_provider, bool high_accuracy); |
+ // Stops the underlying location provider. |
+ // Called on the Geolocation thread. |
+ void Stop(); |
+ |
+ // Returns our singleton. |
+ static AndroidLocationApiAdapter* GetInstance(); |
+ |
+ // Called when initializing chrome_view to obtain a pointer to the java class. |
+ static bool RegisterGeolocationService(JNIEnv* env); |
+ |
+ // Called by JNI on main thread looper. |
+ static void OnNewLocationAvailable(double latitude, |
+ double longitude, |
+ double time_stamp, |
+ bool has_altitude, double altitude, |
+ bool has_accuracy, double accuracy, |
+ bool has_heading, double heading, |
+ bool has_speed, double speed); |
+ static void OnNewErrorAvailable(JNIEnv* env, jstring message); |
+ |
+ private: |
+ friend struct base::DefaultSingletonTraits<AndroidLocationApiAdapter>; |
+ AndroidLocationApiAdapter(); |
+ ~AndroidLocationApiAdapter(); |
+ |
+ void CreateJavaObject(JNIEnv* env); |
+ |
+ // Called on the JNI main thread looper. |
+ void OnNewGeopositionInternal(const Geoposition& geoposition); |
+ |
+ /// Called on the Geolocation thread. |
+ static void NotifyProviderNewGeoposition(const Geoposition& geoposition); |
+ |
+ base::android::ScopedJavaGlobalRef<jobject> |
+ java_location_provider_android_object_; |
+ // TODO(mvanouwerkerk): Use a callback instead of holding a pointer. |
+ LocationProviderAndroid* location_provider_; // Owned by the arbitrator. |
+ |
+ // Guards against the following member which is accessed on Geolocation |
+ // thread and the JNI main thread looper. |
+ base::Lock lock_; |
+ scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
+}; |
+ |
+} // namespace content |
+ |
+#endif // CONTENT_BROWSER_GEOLOCATION_LOCATION_API_ADAPTER_ANDROID_H_ |