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/*
* Copyright 2012, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "GeolocationClientImpl.h"
#include <Frame.h>
#include <Page.h>
#include <GeolocationController.h>
#include <GeolocationError.h>
#include <GeolocationPosition.h>
#include <WebViewCore.h>
#if PLATFORM(ANDROID)
// Required for sim-eng build
#include <math.h>
#endif
#include <wtf/CurrentTime.h>
using WebCore::Geolocation;
using WebCore::GeolocationError;
using WebCore::GeolocationPosition;
using WebCore::Timer;
using namespace std;
namespace {
bool isPositionMovement(GeolocationPosition* position1, GeolocationPosition* position2)
{
// For the small distances in which we are likely concerned, it's reasonable
// to approximate the distance between the two positions as the sum of the
// differences in latitude and longitude.
double delta = fabs(position1->latitude() - position2->latitude()) + fabs(position1->longitude() - position2->longitude());
// Approximate conversion from degrees of arc to metres.
delta *= 60 * 1852;
// The threshold is when the distance between the two positions exceeds the
// worse (larger) of the two accuracies.
int maxAccuracy = max(position1->accuracy(), position2->accuracy());
return delta > maxAccuracy;
}
bool isPositionMoreAccurate(GeolocationPosition* position1, GeolocationPosition* position2)
{
return position2->accuracy() < position1->accuracy();
}
bool isPositionMoreTimely(GeolocationPosition* position1)
{
double currentTime = WTF::currentTime();
double maximumAge = 10 * 60; // 10 minutes
return currentTime - position1->timestamp() > maximumAge;
}
} // anonymous namespace
namespace android {
GeolocationClientImpl::GeolocationClientImpl(WebViewCore* webViewCore)
: m_webViewCore(webViewCore)
, m_timer(this, &GeolocationClientImpl::timerFired)
, m_isSuspended(false)
, m_useGps(false)
{
}
GeolocationClientImpl::~GeolocationClientImpl()
{
}
void GeolocationClientImpl::geolocationDestroyed()
{
// Lifetime is managed by GeolocationManager.
}
void GeolocationClientImpl::startUpdating()
{
// This method is called every time a new watch or one-shot position request
// is started. If we already have a position or an error, call back
// immediately.
if (m_lastPosition || m_lastError) {
m_timer.startOneShot(0);
}
// Lazilly create the Java object.
bool haveJavaBridge = m_javaBridge;
if (!haveJavaBridge)
m_javaBridge.set(new GeolocationServiceBridge(this, m_webViewCore));
ASSERT(m_javaBridge);
// Set whether to use GPS before we start the implementation.
m_javaBridge->setEnableGps(m_useGps);
// If we're suspended, don't start the service. It will be started when we
// get the call to resume().
if (!haveJavaBridge && !m_isSuspended)
m_javaBridge->start();
}
void GeolocationClientImpl::stopUpdating()
{
// TODO: It would be good to re-use the Java bridge object.
m_javaBridge.clear();
m_useGps = false;
// Reset last position and error to make sure that we always try to get a
// new position from the client when a request is first made.
m_lastPosition = 0;
m_lastError = 0;
if (m_timer.isActive())
m_timer.stop();
}
void GeolocationClientImpl::setEnableHighAccuracy(bool enableHighAccuracy)
{
// On Android, high power == GPS.
m_useGps = enableHighAccuracy;
if (m_javaBridge)
m_javaBridge->setEnableGps(m_useGps);
}
GeolocationPosition* GeolocationClientImpl::lastPosition()
{
return m_lastPosition.get();
}
void GeolocationClientImpl::requestPermission(Geolocation* geolocation)
{
permissions()->queryPermissionState(geolocation->frame());
}
void GeolocationClientImpl::cancelPermissionRequest(Geolocation* geolocation)
{
permissions()->cancelPermissionStateQuery(geolocation->frame());
}
// Note that there is no guarantee that subsequent calls to this method offer a
// more accurate or updated position.
void GeolocationClientImpl::newPositionAvailable(PassRefPtr<GeolocationPosition> position)
{
ASSERT(position);
if (!m_lastPosition
|| isPositionMovement(m_lastPosition.get(), position.get())
|| isPositionMoreAccurate(m_lastPosition.get(), position.get())
|| isPositionMoreTimely(m_lastPosition.get())) {
m_lastPosition = position;
// Remove the last error.
m_lastError = 0;
m_webViewCore->mainFrame()->page()->geolocationController()->positionChanged(m_lastPosition.get());
}
}
void GeolocationClientImpl::newErrorAvailable(PassRefPtr<WebCore::GeolocationError> error)
{
ASSERT(error);
// We leave the last position
m_lastError = error;
m_webViewCore->mainFrame()->page()->geolocationController()->errorOccurred(m_lastError.get());
}
void GeolocationClientImpl::suspend()
{
m_isSuspended = true;
if (m_javaBridge)
m_javaBridge->stop();
}
void GeolocationClientImpl::resume()
{
m_isSuspended = false;
if (m_javaBridge)
m_javaBridge->start();
}
void GeolocationClientImpl::resetTemporaryPermissionStates()
{
permissions()->resetTemporaryPermissionStates();
}
void GeolocationClientImpl::providePermissionState(String origin, bool allow, bool remember)
{
permissions()->providePermissionState(origin, allow, remember);
}
GeolocationPermissions* GeolocationClientImpl::permissions() const
{
if (!m_permissions)
m_permissions = new GeolocationPermissions(m_webViewCore);
return m_permissions.get();
}
void GeolocationClientImpl::timerFired(Timer<GeolocationClientImpl>* timer)
{
ASSERT(&m_timer == timer);
ASSERT(m_lastPosition || m_lastError);
if (m_lastPosition)
m_webViewCore->mainFrame()->page()->geolocationController()->positionChanged(m_lastPosition.get());
else
m_webViewCore->mainFrame()->page()->geolocationController()->errorOccurred(m_lastError.get());
}
} // namespace android
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