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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_NETINFO_NETWORK_INFORMATION_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_NETINFO_NETWORK_INFORMATION_H_
#include <optional>
#include "third_party/blink/public/platform/web_connection_type.h"
#include "third_party/blink/public/platform/web_effective_connection_type.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/core/dom/events/event_target.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/platform/network/network_state_notifier.h"
#include "third_party/blink/renderer/platform/supplementable.h"
namespace blink {
class NavigatorBase;
class V8ConnectionType;
class V8EffectiveConnectionType;
class NetworkInformation final
: public EventTarget,
public ActiveScriptWrappable<NetworkInformation>,
public Supplement<NavigatorBase>,
public ExecutionContextLifecycleObserver,
public NetworkStateNotifier::NetworkStateObserver {
DEFINE_WRAPPERTYPEINFO();
public:
static const char kSupplementName[];
// Web-exposed as navigator.connection.
static NetworkInformation* connection(NavigatorBase&);
explicit NetworkInformation(NavigatorBase&);
~NetworkInformation() override;
V8ConnectionType type() const;
double downlinkMax() const;
V8EffectiveConnectionType effectiveType();
uint32_t rtt();
double downlink();
bool saveData() const;
// NetworkStateObserver overrides.
void ConnectionChange(WebConnectionType,
double downlink_max_mbps,
WebEffectiveConnectionType effective_type,
const std::optional<base::TimeDelta>& http_rtt,
const std::optional<base::TimeDelta>& transport_rtt,
const std::optional<double>& downlink_mbps,
bool save_data) override;
// EventTarget overrides.
const AtomicString& InterfaceName() const override;
ExecutionContext* GetExecutionContext() const override;
void RemoveAllEventListeners() override;
// ScriptWrappable
bool HasPendingActivity() const final;
// ExecutionContextLifecycleObserver overrides.
void ContextDestroyed() override;
void Trace(Visitor*) const override;
DEFINE_ATTRIBUTE_EVENT_LISTENER(change, kChange)
DEFINE_ATTRIBUTE_EVENT_LISTENER(typechange, kTypechange) // Deprecated
protected:
// EventTarget overrides.
void AddedEventListener(const AtomicString& event_type,
RegisteredEventListener&) final;
void RemovedEventListener(const AtomicString& event_type,
const RegisteredEventListener&) final;
private:
void StartObserving();
void StopObserving();
// Whether this object is listening for events from NetworkStateNotifier.
bool IsObserving() const;
const String Host() const;
void MaybeShowWebHoldbackConsoleMsg();
// Touched only on context thread.
WebConnectionType type_;
// Touched only on context thread.
double downlink_max_mbps_;
// Current effective connection type, which is the connection type whose
// typical performance is most similar to the measured performance of the
// network in use.
WebEffectiveConnectionType effective_type_;
// HTTP RTT estimate. Rounded off to the nearest 25 msec. Touched only on
// context thread.
uint32_t http_rtt_msec_;
// Downlink throughput estimate. Rounded off to the nearest 25 kbps. Touched
// only on context thread.
double downlink_mbps_;
// Whether the data saving mode is enabled.
bool save_data_;
// True if the console message indicating that network quality is overridden
// using a holdback experiment has been shown. Set to true if the console
// message has been shown, or if the holdback experiment is not enabled.
bool web_holdback_console_message_shown_;
// Whether ExecutionContextLifecycleObserver::contextDestroyed has been
// called.
bool context_stopped_;
std::unique_ptr<NetworkStateNotifier::NetworkStateObserverHandle>
connection_observer_handle_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_NETINFO_NETWORK_INFORMATION_H_
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