summaryrefslogtreecommitdiffstats
path: root/dom/vr/VREventObserver.cpp
blob: 51c23bfab534c1ed64229f010a33b0e9ff03492e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/* -*- 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 "nsGlobalWindowInner.h"

#include "mozilla/Telemetry.h"

namespace mozilla::dom {

using namespace gfx;

/**
 * This class is used by nsGlobalWindowInner 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 nsGlobalWindowInner 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 nsGlobalWindowInner::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 mozilla::dom