Expose mock geofencing service via testRunner.

content/browser/geofencing/mock_geofencing_service.cc

+// Copyright 2014 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.
+
+// MSVC++ requires this to be set before any other includes to get M_PI.
+#define _USE_MATH_DEFINES
+
+#include "content/browser/geofencing/mock_geofencing_service.h"
+
+#include <cmath>
+
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "content/browser/geofencing/geofencing_registration_delegate.h"
+#include "third_party/WebKit/public/platform/WebCircularGeofencingRegion.h"
+
+namespace content {
+
+namespace {
+
+void RegisterRegionResult(GeofencingRegistrationDelegate* delegate,
+                          int64 geofencing_registration_id,
+                          GeofencingStatus status) {
+  base::MessageLoop::current()->PostTask(
+      FROM_HERE,
+      base::Bind(&GeofencingRegistrationDelegate::RegistrationFinished,
+                 base::Unretained(delegate), geofencing_registration_id,
+                 status));
+}
+
+double DegreesToRadians(float degrees) {
+  return (M_PI * degrees) / 180.f;
+}
+
+double Haversin(double theta) {
+  double temp = sin(theta / 2);
+  return temp * temp;
+}
+
+// Calculates the distance in meters between two points with coordinates in
+// degrees.
+double Distance(double lat1, double long1, double lat2, double long2) {
+  double R = 6371000;  // radius of earth in meters
+  double phi1 = DegreesToRadians(lat1);
+  double phi2 = DegreesToRadians(lat2);
+  double dphi = DegreesToRadians(lat2 - lat1);
+  double dlambda = DegreesToRadians(long2 - long1);
+  double haversine = Haversin(dphi) + cos(phi1) * cos(phi2) * Haversin(dlambda);
+  return 2 * R * asin(sqrt(haversine));
+}
+
+// Returns true iff the provided coordinate is inside the region.
+bool PositionInRegion(double latitude,
+                      double longitude,
+                      const blink::WebCircularGeofencingRegion& region) {
+  return Distance(latitude, longitude, region.latitude, region.longitude) <=
+         region.radius;
+}
+}
+
+struct MockGeofencingService::Registration {
+  blink::WebCircularGeofencingRegion region;
+  GeofencingRegistrationDelegate* delegate;
+  // True iff the last event emitted for this region was a RegionEntered event.
+  bool is_inside;
+};
+
+MockGeofencingService::MockGeofencingService(bool service_available)
+    : available_(service_available),
+      next_id_(0),
+      has_position_(false),
+      last_latitude_(0),
+      last_longitude_(0) {
+}
+
+MockGeofencingService::~MockGeofencingService() {
+}
+
+void MockGeofencingService::SetMockPosition(double latitude, double longitude) {
+  has_position_ = true;
+  last_latitude_ = latitude;
+  last_longitude_ = longitude;
+  for (auto& registration : registrations_) {
+    bool is_inside =
+        PositionInRegion(latitude, longitude, registration.second.region);
+    if (is_inside != registration.second.is_inside) {
+      if (is_inside)
+        registration.second.delegate->RegionEntered(registration.first);
+      else
+        registration.second.delegate->RegionExited(registration.first);
+    }
+    registration.second.is_inside = is_inside;
+  }
+}
+
+bool MockGeofencingService::IsServiceAvailable() {
+  return available_;
+}
+
+int64 MockGeofencingService::RegisterRegion(
+    const blink::WebCircularGeofencingRegion& region,
+    GeofencingRegistrationDelegate* delegate) {
+  int64 id = next_id_++;
+  Registration& registration = registrations_[id];
+  registration.region = region;
+  registration.delegate = delegate;
+  registration.is_inside =
+      has_position_ &&
+      PositionInRegion(last_latitude_, last_longitude_, region);
+  RegisterRegionResult(delegate, id, GEOFENCING_STATUS_OK);
+  if (registration.is_inside) {
+    base::MessageLoop::current()->PostTask(
+        FROM_HERE, base::Bind(&GeofencingRegistrationDelegate::RegionEntered,
+                              base::Unretained(delegate), id));
+  }
+  return id;
+}
+
+void MockGeofencingService::UnregisterRegion(int64 geofencing_registration_id) {
+  registrations_.erase(geofencing_registration_id);
+}
+
+}  // namespace content