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/* -*- 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/. */
#include "VREventObserver.h"
#include "nsContentUtils.h"
#include "nsGlobalWindow.h"
#include "mozilla/Telemetry.h"
namespace mozilla {
namespace dom {
using namespace gfx;
/**
* This class is used by nsGlobalWindow to implement window.onvrdisplayactivate,
* window.onvrdisplaydeactivate, window.onvrdisplayconnected,
* window.onvrdisplaydisconnected, and window.onvrdisplaypresentchange.
*/
VREventObserver::VREventObserver(nsGlobalWindowInner* aGlobalWindow)
: mWindow(aGlobalWindow),
mIs2DView(true),
mHasReset(false),
mStopActivity(false) {
MOZ_ASSERT(aGlobalWindow);
UpdateSpentTimeIn2DTelemetry(false);
VRManagerChild* vmc = VRManagerChild::Get();
if (vmc) {
vmc->AddListener(this);
}
}
VREventObserver::~VREventObserver() { DisconnectFromOwner(); }
void VREventObserver::DisconnectFromOwner() {
// In the event that nsGlobalWindow is deallocated, VREventObserver may
// still be AddRef'ed elsewhere. Ensure that we don't UAF by
// dereferencing mWindow.
UpdateSpentTimeIn2DTelemetry(true);
mWindow = nullptr;
// Unregister from VRManagerChild
if (VRManagerChild::IsCreated()) {
VRManagerChild* vmc = VRManagerChild::Get();
vmc->RemoveListener(this);
}
mStopActivity = true;
}
void VREventObserver::UpdateSpentTimeIn2DTelemetry(bool aUpdate) {
// mHasReset for avoiding setting the telemetry continuously
// for the telemetry is already been set when it is at the background.
// then, it would be set again when the process is exit and calling
// VREventObserver::DisconnectFromOwner().
if (mWindow && mIs2DView && aUpdate && mHasReset) {
// The WebVR content is closed, and we will collect the telemetry info
// for the users who view it in 2D view only.
Telemetry::Accumulate(Telemetry::WEBVR_USERS_VIEW_IN, 0);
Telemetry::AccumulateTimeDelta(Telemetry::WEBVR_TIME_SPENT_VIEWING_IN_2D,
mSpendTimeIn2DView);
mHasReset = false;
} else if (!aUpdate) {
mSpendTimeIn2DView = TimeStamp::Now();
mHasReset = true;
}
}
void VREventObserver::StartActivity() {
mStopActivity = false;
VRManagerChild* vmc = VRManagerChild::Get();
vmc->StartActivity();
}
void VREventObserver::StopActivity() {
mStopActivity = true;
VRManagerChild* vmc = VRManagerChild::Get();
vmc->StopActivity();
}
bool VREventObserver::GetStopActivityStatus() const { return mStopActivity; }
void VREventObserver::NotifyAfterLoad() {
if (VRManagerChild::IsCreated()) {
VRManagerChild* vmc = VRManagerChild::Get();
vmc->FireDOMVRDisplayConnectEventsForLoad(this);
}
}
void VREventObserver::NotifyVRDisplayMounted(uint32_t aDisplayID) {
if (mWindow && mWindow->IsCurrentInnerWindow() && IsWebVR(aDisplayID)) {
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
mWindow->DispatchVRDisplayActivate(aDisplayID,
VRDisplayEventReason::Mounted);
}
}
void VREventObserver::NotifyVRDisplayNavigation(uint32_t aDisplayID) {
if (mWindow && mWindow->IsCurrentInnerWindow() && IsWebVR(aDisplayID)) {
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
mWindow->DispatchVRDisplayActivate(aDisplayID,
VRDisplayEventReason::Navigation);
}
}
void VREventObserver::NotifyVRDisplayRequested(uint32_t aDisplayID) {
if (mWindow && mWindow->IsCurrentInnerWindow() && IsWebVR(aDisplayID)) {
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
mWindow->DispatchVRDisplayActivate(aDisplayID,
VRDisplayEventReason::Requested);
}
}
void VREventObserver::NotifyVRDisplayUnmounted(uint32_t aDisplayID) {
if (mWindow && mWindow->IsCurrentInnerWindow() && IsWebVR(aDisplayID)) {
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
mWindow->DispatchVRDisplayDeactivate(aDisplayID,
VRDisplayEventReason::Unmounted);
}
}
void VREventObserver::NotifyVRDisplayConnect(uint32_t aDisplayID) {
/**
* We do not call nsGlobalWindow::NotifyActiveVRDisplaysChanged here, as we
* can assume that a newly enumerated display is not presenting WebVR
* content.
*/
if (mWindow && mWindow->IsCurrentInnerWindow() && IsWebVR(aDisplayID)) {
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
mWindow->DispatchVRDisplayConnect(aDisplayID);
}
}
void VREventObserver::NotifyVRDisplayDisconnect(uint32_t aDisplayID) {
if (mWindow && mWindow->IsCurrentInnerWindow() && IsWebVR(aDisplayID)) {
mWindow->NotifyActiveVRDisplaysChanged();
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
mWindow->DispatchVRDisplayDisconnect(aDisplayID);
}
}
void VREventObserver::NotifyVRDisplayPresentChange(uint32_t aDisplayID) {
// When switching to HMD present mode, it is no longer
// to be a 2D view.
mIs2DView = false;
if (mWindow && mWindow->IsCurrentInnerWindow() && IsWebVR(aDisplayID)) {
mWindow->NotifyActiveVRDisplaysChanged();
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
mWindow->DispatchVRDisplayPresentChange(aDisplayID);
}
}
void VREventObserver::NotifyPresentationGenerationChanged(uint32_t aDisplayID) {
if (mWindow && mWindow->IsCurrentInnerWindow() && IsWebVR(aDisplayID)) {
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
mWindow->NotifyPresentationGenerationChanged(aDisplayID);
}
}
void VREventObserver::NotifyEnumerationCompleted() {}
void VREventObserver::NotifyDetectRuntimesCompleted() {
if (mWindow && mWindow->IsCurrentInnerWindow()) {
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
mWindow->NotifyDetectXRRuntimesCompleted();
}
}
bool VREventObserver::IsWebVR(uint32_t aDisplayID) const {
VRManagerChild* vmc = VRManagerChild::Get();
if (vmc) {
return vmc->GetVRAPIMode(aDisplayID) == gfx::VRAPIMode::WebVR;
}
return true;
}
} // namespace dom
} // namespace mozilla
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