1 files changed, 193 insertions, 0 deletions
diff --git a/core/java/android/webkit/GeolocationService.java b/core/java/android/webkit/GeolocationService.java
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+++ b/core/java/android/webkit/GeolocationService.java
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+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.webkit;
+
+import android.app.ActivityThread;
+import android.content.Context;
+import android.location.Location;
+import android.location.LocationListener;
+import android.location.LocationManager;
+import android.location.LocationProvider;
+import android.os.Bundle;
+import android.util.Log;
+import android.webkit.WebView;
+import android.webkit.WebViewCore;
+
+
+/**
+ * Implements the Java side of GeolocationServiceAndroid.
+ */
+final class GeolocationService implements LocationListener {
+
+    // Log tag
+    private static final String TAG = "geolocationService";
+
+    private long mNativeObject;
+    private LocationManager mLocationManager;
+    private boolean mIsGpsEnabled;
+    private boolean mIsRunning;
+    private boolean mIsNetworkProviderAvailable;
+    private boolean mIsGpsProviderAvailable;
+
+    /**
+     * Constructor
+     * @param nativeObject The native object to which this object will report position updates and
+     *     errors.
+     */
+    public GeolocationService(long nativeObject) {
+        mNativeObject = nativeObject;
+        // Register newLocationAvailable with platform service.
+        ActivityThread thread = ActivityThread.systemMain();
+        Context context = thread.getApplication();
+        mLocationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
+        if (mLocationManager == null) {
+            Log.e(TAG, "Could not get location manager.");
+        }
+     }
+
+    /**
+     * Start listening for location updates.
+     */
+    public void start() {
+        registerForLocationUpdates();
+        mIsRunning = true;
+    }
+
+    /**
+     * Stop listening for location updates.
+     */
+    public void stop() {
+        unregisterFromLocationUpdates();
+        mIsRunning = false;
+    }
+
+    /**
+     * Sets whether to use the GPS.
+     * @param enable Whether to use the GPS.
+     */
+    public void setEnableGps(boolean enable) {
+        if (mIsGpsEnabled != enable) {
+            mIsGpsEnabled = enable;
+            if (mIsRunning) {
+                // There's no way to unregister from a single provider, so we can
+                // only unregister from all, then reregister with all but the GPS.
+                unregisterFromLocationUpdates();
+                registerForLocationUpdates();
+            }
+        }
+    }
+
+    /**
+     * LocationListener implementation.
+     * Called when the location has changed.
+     * @param location The new location, as a Location object.
+     */
+    public void onLocationChanged(Location location) {
+        // Callbacks from the system location sevice are queued to this thread, so it's possible
+        // that we receive callbacks after unregistering. At this point, the native object will no
+        // longer exist.
+        if (mIsRunning) {
+            nativeNewLocationAvailable(mNativeObject, location);
+        }
+    }
+
+    /**
+     * LocationListener implementation.
+     * Called when the provider status changes.
+     * @param provider The name of the provider.
+     * @param status The new status of the provider.
+     * @param extras an optional Bundle with provider specific data.
+     */
+    public void onStatusChanged(String providerName, int status, Bundle extras) {
+        boolean isAvailable = (status == LocationProvider.AVAILABLE);
+        if (LocationManager.NETWORK_PROVIDER.equals(providerName)) {
+            mIsNetworkProviderAvailable = isAvailable;
+        } else if (LocationManager.GPS_PROVIDER.equals(providerName)) {
+            mIsGpsProviderAvailable = isAvailable;
+        }
+        maybeReportError("The last location provider is no longer available");
+    }
+
+    /**
+     * LocationListener implementation.
+     * Called when the provider is enabled.
+     * @param provider The name of the location provider that is now enabled.
+     */
+    public void onProviderEnabled(String providerName) {
+        // No need to notify the native side. It's enough to start sending
+        // valid position fixes again.
+        if (LocationManager.NETWORK_PROVIDER.equals(providerName)) {
+            mIsNetworkProviderAvailable = true;
+        } else if (LocationManager.GPS_PROVIDER.equals(providerName)) {
+            mIsGpsProviderAvailable = true;
+        }
+    }
+
+    /**
+     * LocationListener implementation.
+     * Called when the provider is disabled.
+     * @param provider The name of the location provider that is now disabled.
+     */
+    public void onProviderDisabled(String providerName) {
+        if (LocationManager.NETWORK_PROVIDER.equals(providerName)) {
+            mIsNetworkProviderAvailable = false;
+        } else if (LocationManager.GPS_PROVIDER.equals(providerName)) {
+            mIsGpsProviderAvailable = false;
+        }
+        maybeReportError("The last location provider was disabled");
+    }
+
+    /**
+     * Registers this object with the location service.
+     */
+    private void registerForLocationUpdates() {
+        try {
+            mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
+            mIsNetworkProviderAvailable = true;
+            if (mIsGpsEnabled) {
+                mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
+                mIsGpsProviderAvailable = true;
+            }
+        } catch(SecurityException e) {
+            Log.e(TAG, "Caught security exception registering for location updates from system. " +
+                "This should only happen in DumpRenderTree.");
+        }
+    }
+
+    /**
+     * Unregisters this object from the location service.
+     */
+    private void unregisterFromLocationUpdates() {
+        mLocationManager.removeUpdates(this);
+    }
+
+    /**
+     * Reports an error if neither the network nor the GPS provider is available.
+     */
+    private void maybeReportError(String message) {
+        // Callbacks from the system location sevice are queued to this thread, so it's possible
+        // that we receive callbacks after unregistering. At this point, the native object will no
+        // longer exist.
+        if (mIsRunning && !mIsNetworkProviderAvailable && !mIsGpsProviderAvailable) {
+            nativeNewErrorAvailable(mNativeObject, message);
+        }
+    }
+
+    // Native functions
+    private static native void nativeNewLocationAvailable(long nativeObject, Location location);
+    private static native void nativeNewErrorAvailable(long nativeObject, String message);
+}