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// 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.
#include "config.h"
#include "modules/netinfo/NetworkInformation.h"
#include "core/dom/ExecutionContext.h"
#include "core/events/Event.h"
#include "core/page/NetworkStateNotifier.h"
#include "modules/EventTargetModules.h"
#include "wtf/text/WTFString.h"
namespace {
String connectionTypeToString(blink::WebConnectionType type)
{
switch (type) {
case blink::ConnectionTypeCellular:
return "cellular";
case blink::ConnectionTypeBluetooth:
return "bluetooth";
case blink::ConnectionTypeEthernet:
return "ethernet";
case blink::ConnectionTypeWifi:
return "wifi";
case blink::ConnectionTypeOther:
return "other";
case blink::ConnectionTypeNone:
return "none";
case blink::ConnectionTypeUnknown:
return "unknown";
}
ASSERT_NOT_REACHED();
return "none";
}
} // namespace
namespace blink {
NetworkInformation* NetworkInformation::create(ExecutionContext* context)
{
NetworkInformation* connection = new NetworkInformation(context);
connection->suspendIfNeeded();
return connection;
}
NetworkInformation::~NetworkInformation()
{
ASSERT(!m_observing);
}
String NetworkInformation::type() const
{
// m_type is only updated when listening for events, so ask networkStateNotifier
// if not listening (crbug.com/379841).
if (!m_observing)
return connectionTypeToString(networkStateNotifier().connectionType());
// If observing, return m_type which changes when the event fires, per spec.
return connectionTypeToString(m_type);
}
void NetworkInformation::connectionTypeChange(WebConnectionType type)
{
ASSERT(executionContext()->isContextThread());
// This can happen if the observer removes and then adds itself again
// during notification.
if (m_type == type)
return;
m_type = type;
dispatchEvent(Event::create(EventTypeNames::typechange));
}
const AtomicString& NetworkInformation::interfaceName() const
{
return EventTargetNames::NetworkInformation;
}
ExecutionContext* NetworkInformation::executionContext() const
{
return ActiveDOMObject::executionContext();
}
bool NetworkInformation::addEventListener(const AtomicString& eventType, PassRefPtr<EventListener> listener, bool useCapture)
{
if (!EventTargetWithInlineData::addEventListener(eventType, listener, useCapture))
return false;
startObserving();
return true;
}
bool NetworkInformation::removeEventListener(const AtomicString& eventType, PassRefPtr<EventListener> listener, bool useCapture)
{
if (!EventTargetWithInlineData::removeEventListener(eventType, listener, useCapture))
return false;
if (!hasEventListeners())
stopObserving();
return true;
}
void NetworkInformation::removeAllEventListeners()
{
EventTargetWithInlineData::removeAllEventListeners();
ASSERT(!hasEventListeners());
stopObserving();
}
bool NetworkInformation::hasPendingActivity() const
{
ASSERT(m_contextStopped || m_observing == hasEventListeners());
// Prevent collection of this object when there are active listeners.
return m_observing;
}
void NetworkInformation::stop()
{
m_contextStopped = true;
stopObserving();
}
void NetworkInformation::startObserving()
{
if (!m_observing && !m_contextStopped) {
m_type = networkStateNotifier().connectionType();
networkStateNotifier().addObserver(this, executionContext());
m_observing = true;
}
}
void NetworkInformation::stopObserving()
{
if (m_observing) {
networkStateNotifier().removeObserver(this, executionContext());
m_observing = false;
}
}
NetworkInformation::NetworkInformation(ExecutionContext* context)
: ActiveDOMObject(context)
, m_type(networkStateNotifier().connectionType())
, m_observing(false)
, m_contextStopped(false)
{
}
void NetworkInformation::trace(Visitor* visitor)
{
RefCountedGarbageCollectedEventTargetWithInlineData<NetworkInformation>::trace(visitor);
ActiveDOMObject::trace(visitor);
}
} // namespace blink
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