gecko/dom/geolocation/nsGeolocationSettings.h
2015-05-03 15:32:37 -04:00

167 lines
5.5 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsGeolocationSettings_h
#define nsGeolocationSettings_h
#include "mozilla/Attributes.h"
#include "mozilla/StaticPtr.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsClassHashtable.h"
#include "nsString.h"
#include "nsIObserver.h"
#include "nsJSUtils.h"
#include "nsTArray.h"
#if (defined(MOZ_GPS_DEBUG) && defined(ANDROID))
#include <android/log.h>
#define GPSLOG(fmt, ...) __android_log_print(ANDROID_LOG_WARN, "GPS", "%12s:%-5d " fmt, __FILE__, __LINE__, ##__VA_ARGS__)
#else
#define GPSLOG(...) {;}
#endif // MOZ_GPS_DEBUG && ANDROID
// The settings key.
#define GEO_ENABLED "geolocation.enabled"
#define GEO_ALA_ENABLED "ala.settings.enabled"
#define GEO_ALA_TYPE "geolocation.type"
#define GEO_ALA_FIXED_COORDS "geolocation.fixed_coords"
#define GEO_ALA_APP_SETTINGS "geolocation.app_settings"
#define GEO_ALA_ALWAYS_PRECISE "geolocation.always_precise"
#ifdef MOZ_APPROX_LOCATION
#define GEO_ALA_APPROX_DISTANCE "geolocation.approx_distance"
#endif
enum GeolocationFuzzMethod {
GEO_ALA_TYPE_PRECISE, // default, GPS/AGPS location
GEO_ALA_TYPE_FIXED, // user supplied lat/long
GEO_ALA_TYPE_NONE, // no location given
#ifdef MOZ_APPROX_LOCATION
GEO_ALA_TYPE_APPROX // approximate, grid-based location
#endif
};
#define GEO_ALA_TYPE_DEFAULT (GEO_ALA_TYPE_PRECISE)
#define GEO_ALA_TYPE_FIRST (GEO_ALA_TYPE_PRECISE)
#ifdef MOZ_APPROX_LOCATION
#define GEO_ALA_TYPE_LAST (GEO_ALA_TYPE_APPROX)
#else
#define GEO_ALA_TYPE_LAST (GEO_ALA_TYPE_NONE)
#endif
/**
* Simple class for holding the geolocation settings values.
*/
class GeolocationSetting final {
public:
explicit GeolocationSetting(const nsString& aOrigin) :
mFuzzMethod(GEO_ALA_TYPE_DEFAULT),
#ifdef MOZ_APPROX_LOCATION
mDistance(0),
#endif
mLatitude(0.0),
mLongitude(0.0),
mOrigin(aOrigin) {}
GeolocationSetting(const GeolocationSetting& rhs) :
mFuzzMethod(rhs.mFuzzMethod),
#ifdef MOZ_APPROX_LOCATION
mDistance(rhs.mDistance),
#endif
mLatitude(rhs.mLatitude),
mLongitude(rhs.mLongitude),
mOrigin(rhs.mOrigin) {}
~GeolocationSetting() {}
GeolocationSetting& operator=(const GeolocationSetting& rhs) {
mFuzzMethod = rhs.mFuzzMethod;
#ifdef MOZ_APPROX_LOCATION
mDistance = rhs.mDistance;
#endif
mLatitude = rhs.mLatitude;
mLongitude = rhs.mLongitude;
mOrigin = rhs.mOrigin;
return *this;
}
void HandleTypeChange(const JS::Value& aVal);
void HandleApproxDistanceChange(const JS::Value& aVal);
void HandleFixedCoordsChange(const JS::Value& aVal);
inline GeolocationFuzzMethod GetType() const { return mFuzzMethod; }
#ifdef MOZ_APPROX_LOCATION
inline int32_t GetApproxDistance() const { return mDistance; }
#endif
inline double GetFixedLatitude() const { return mLatitude; }
inline double GetFixedLongitude() const { return mLongitude; }
inline const nsString& GetOrigin() const { return mOrigin; }
private:
GeolocationSetting() {} // can't default construct
GeolocationFuzzMethod mFuzzMethod;
#ifdef MOZ_APPROX_LOCATION
int32_t mDistance;
#endif
double mLatitude,
mLongitude;
nsString mOrigin;
};
/**
* Singleton that holds the global and per-origin geolocation settings.
*/
class nsGeolocationSettings final : public nsIObserver
{
public:
static already_AddRefed<nsGeolocationSettings> GetGeolocationSettings();
static mozilla::StaticRefPtr<nsGeolocationSettings> sSettings;
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOBSERVER
nsGeolocationSettings() : mAlaEnabled(false), mGlobalSetting(NullString()) {}
nsresult Init();
void HandleGeolocationSettingsChange(const nsAString& aKey, const JS::Value& aVal);
void HandleGeolocationSettingsError(const nsAString& aName);
void PutWatchOrigin(int32_t aWatchID, const nsCString& aOrigin);
void RemoveWatchOrigin(int32_t aWatchID);
void GetWatchOrigin(int32_t aWatchID, nsCString& aOrigin);
inline bool IsAlaEnabled() const { return mAlaEnabled; }
// given a watch ID, retrieve the geolocation settings. the watch ID is
// mapped to the origin of the listener/request which is then used to
// retreive the geolocation settings for the origin.
// if the origin is in the always-precise list, the settings will always be
// 'precise'. if the origin has origin-specific settings, that will be returned
// otherwise the global geolocation settings will be returned.
// NOTE: this returns a copy of the settings to enforce read-only client access
GeolocationSetting LookupGeolocationSetting(int32_t aWatchID);
private:
~nsGeolocationSettings() {}
nsGeolocationSettings(const nsGeolocationSettings&) :
mGlobalSetting(NullString()) {} // can't copy obj
void HandleMozsettingsChanged(nsISupports* aSubject);
void HandleGeolocationAlaEnabledChange(const JS::Value& aVal);
void HandleGeolocationPerOriginSettingsChange(const JS::Value& aVal);
void HandleGeolocationAlwaysPreciseChange(const JS::Value& aVal);
private:
bool mAlaEnabled;
GeolocationSetting mGlobalSetting;
nsClassHashtable<nsStringHashKey, GeolocationSetting> mPerOriginSettings;
nsTArray<nsString> mAlwaysPreciseApps;
nsClassHashtable<nsUint32HashKey, nsCString> mCurrentWatches;
};
#endif /* nsGeolocationSettings_h */