Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

12 files changed, 802 insertions, 0 deletions

diff --git a/dom/gamepad/ipc/GamepadEventChannelChild.cpp b/dom/gamepad/ipc/GamepadEventChannelChild.cpp
new file mode 100644
index 0000000000..ef8528f565
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadEventChannelChild.cpp
@@ -0,0 +1,63 @@
+/* -*- 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 "GamepadEventChannelChild.h"
+#include "mozilla/dom/GamepadManager.h"
+#include "mozilla/dom/Promise.h"
+
+namespace mozilla::dom {
+
+namespace {
+
+class GamepadUpdateRunnable final : public Runnable {
+ public:
+  explicit GamepadUpdateRunnable(const GamepadChangeEvent& aGamepadEvent)
+      : Runnable("dom::GamepadUpdateRunnable"), mEvent(aGamepadEvent) {}
+  NS_IMETHOD Run() override {
+    RefPtr<GamepadManager> svc(GamepadManager::GetService());
+    if (svc) {
+      svc->Update(mEvent);
+    }
+    return NS_OK;
+  }
+
+ protected:
+  GamepadChangeEvent mEvent;
+};
+
+}  // namespace
+
+already_AddRefed<GamepadEventChannelChild> GamepadEventChannelChild::Create() {
+  return RefPtr<GamepadEventChannelChild>(new GamepadEventChannelChild())
+      .forget();
+}
+
+mozilla::ipc::IPCResult GamepadEventChannelChild::RecvGamepadUpdate(
+    const GamepadChangeEvent& aGamepadEvent) {
+  DebugOnly<nsresult> rv =
+      NS_DispatchToMainThread(new GamepadUpdateRunnable(aGamepadEvent));
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "NS_DispatchToMainThread failed");
+  return IPC_OK();
+}
+
+void GamepadEventChannelChild::AddPromise(const uint32_t& aID,
+                                          dom::Promise* aPromise) {
+  MOZ_ASSERT(!mPromiseList.Contains(aID));
+  mPromiseList.InsertOrUpdate(aID, RefPtr{aPromise});
+}
+
+mozilla::ipc::IPCResult GamepadEventChannelChild::RecvReplyGamepadPromise(
+    const uint32_t& aPromiseID) {
+  RefPtr<dom::Promise> p;
+  if (!mPromiseList.Get(aPromiseID, getter_AddRefs(p))) {
+    MOZ_CRASH("We should always have a promise.");
+  }
+
+  p->MaybeResolve(true);
+  mPromiseList.Remove(aPromiseID);
+  return IPC_OK();
+}
+
+}  // namespace mozilla::dom
diff --git a/dom/gamepad/ipc/GamepadEventChannelChild.h b/dom/gamepad/ipc/GamepadEventChannelChild.h
new file mode 100644
index 0000000000..97fd0576a4
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadEventChannelChild.h
@@ -0,0 +1,39 @@
+/* -*- 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 "mozilla/dom/PGamepadEventChannelChild.h"
+#include "nsRefPtrHashtable.h"
+
+#ifndef mozilla_dom_GamepadEventChannelChild_h_
+#  define mozilla_dom_GamepadEventChannelChild_h_
+
+namespace mozilla::dom {
+
+class GamepadEventChannelChild final : public PGamepadEventChannelChild {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GamepadEventChannelChild, override)
+
+  static already_AddRefed<GamepadEventChannelChild> Create();
+
+  mozilla::ipc::IPCResult RecvGamepadUpdate(
+      const GamepadChangeEvent& aGamepadEvent);
+  mozilla::ipc::IPCResult RecvReplyGamepadPromise(const uint32_t& aPromiseID);
+  void AddPromise(const uint32_t& aID, dom::Promise* aPromise);
+
+  GamepadEventChannelChild(const GamepadEventChannelChild&) = delete;
+  GamepadEventChannelChild(GamepadEventChannelChild&&) = delete;
+  GamepadEventChannelChild& operator=(const GamepadEventChannelChild&) = delete;
+  GamepadEventChannelChild& operator=(GamepadEventChannelChild&&) = delete;
+
+ private:
+  GamepadEventChannelChild() = default;
+  ~GamepadEventChannelChild() = default;
+
+  nsRefPtrHashtable<nsUint32HashKey, dom::Promise> mPromiseList;
+};
+
+}  // namespace mozilla::dom
+
+#endif
diff --git a/dom/gamepad/ipc/GamepadEventChannelParent.cpp b/dom/gamepad/ipc/GamepadEventChannelParent.cpp
new file mode 100644
index 0000000000..4a21948c06
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadEventChannelParent.cpp
@@ -0,0 +1,109 @@
+/* -*- 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 "GamepadEventChannelParent.h"
+#include "GamepadPlatformService.h"
+#include "mozilla/dom/GamepadMonitoring.h"
+#include "mozilla/ipc/BackgroundParent.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla::dom {
+
+using namespace mozilla::ipc;
+
+namespace {
+
+class SendGamepadUpdateRunnable final : public Runnable {
+ private:
+  ~SendGamepadUpdateRunnable() = default;
+  RefPtr<GamepadEventChannelParent> mParent;
+  GamepadChangeEvent mEvent;
+
+ public:
+  SendGamepadUpdateRunnable(GamepadEventChannelParent* aParent,
+                            GamepadChangeEvent aEvent)
+      : Runnable("dom::SendGamepadUpdateRunnable"),
+        mParent(aParent),
+        mEvent(aEvent) {
+    MOZ_ASSERT(mParent);
+  }
+  NS_IMETHOD Run() override {
+    AssertIsOnBackgroundThread();
+    Unused << mParent->SendGamepadUpdate(mEvent);
+    return NS_OK;
+  }
+};
+
+}  // namespace
+
+already_AddRefed<GamepadEventChannelParent>
+GamepadEventChannelParent::Create() {
+  return RefPtr<GamepadEventChannelParent>(new GamepadEventChannelParent())
+      .forget();
+}
+
+GamepadEventChannelParent::GamepadEventChannelParent() : mIsShutdown{false} {
+  MOZ_DIAGNOSTIC_ASSERT(IsOnBackgroundThread());
+
+  mBackgroundEventTarget = GetCurrentSerialEventTarget();
+
+  RefPtr<GamepadPlatformService> service =
+      GamepadPlatformService::GetParentService();
+  MOZ_ASSERT(service);
+
+  service->AddChannelParent(this);
+}
+
+void GamepadEventChannelParent::ActorDestroy(ActorDestroyReason aWhy) {
+  MOZ_DIAGNOSTIC_ASSERT(IsOnBackgroundThread());
+  MOZ_DIAGNOSTIC_ASSERT(!mIsShutdown);
+
+  mIsShutdown = true;
+
+  RefPtr<GamepadPlatformService> service =
+      GamepadPlatformService::GetParentService();
+  MOZ_ASSERT(service);
+  service->RemoveChannelParent(this);
+}
+
+mozilla::ipc::IPCResult GamepadEventChannelParent::RecvVibrateHaptic(
+    const Tainted<GamepadHandle>& aHandle,
+    const Tainted<uint32_t>& aHapticIndex, const Tainted<double>& aIntensity,
+    const Tainted<double>& aDuration, const uint32_t& aPromiseID) {
+  // TODO: Bug 680289, implement for standard gamepads
+
+  if (SendReplyGamepadPromise(aPromiseID)) {
+    return IPC_OK();
+  }
+
+  return IPC_FAIL(this, "SendReplyGamepadPromise fail.");
+}
+
+mozilla::ipc::IPCResult GamepadEventChannelParent::RecvStopVibrateHaptic(
+    const Tainted<GamepadHandle>& aHandle) {
+  // TODO: Bug 680289, implement for standard gamepads
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GamepadEventChannelParent::RecvLightIndicatorColor(
+    const Tainted<GamepadHandle>& aHandle,
+    const Tainted<uint32_t>& aLightColorIndex, const uint8_t& aRed,
+    const uint8_t& aGreen, const uint8_t& aBlue, const uint32_t& aPromiseID) {
+  SetGamepadLightIndicatorColor(aHandle, aLightColorIndex, aRed, aGreen, aBlue);
+
+  if (SendReplyGamepadPromise(aPromiseID)) {
+    return IPC_OK();
+  }
+
+  return IPC_FAIL(this, "SendReplyGamepadPromise fail.");
+}
+
+void GamepadEventChannelParent::DispatchUpdateEvent(
+    const GamepadChangeEvent& aEvent) {
+  mBackgroundEventTarget->Dispatch(new SendGamepadUpdateRunnable(this, aEvent),
+                                   NS_DISPATCH_NORMAL);
+}
+
+}  // namespace mozilla::dom
diff --git a/dom/gamepad/ipc/GamepadEventChannelParent.h b/dom/gamepad/ipc/GamepadEventChannelParent.h
new file mode 100644
index 0000000000..90bb7e7f4d
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadEventChannelParent.h
@@ -0,0 +1,48 @@
+/* -*- 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 "mozilla/dom/PGamepadEventChannelParent.h"
+
+#ifndef mozilla_dom_GamepadEventChannelParent_h_
+#  define mozilla_dom_GamepadEventChannelParent_h_
+
+namespace mozilla::dom {
+
+class GamepadEventChannelParent final : public PGamepadEventChannelParent {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GamepadEventChannelParent, override)
+
+  static already_AddRefed<GamepadEventChannelParent> Create();
+  void ActorDestroy(ActorDestroyReason aWhy) override;
+
+  mozilla::ipc::IPCResult RecvVibrateHaptic(
+      const Tainted<GamepadHandle>& aHandle,
+      const Tainted<uint32_t>& aHapticIndex, const Tainted<double>& aIntensity,
+      const Tainted<double>& aDuration, const uint32_t& aPromiseID);
+  mozilla::ipc::IPCResult RecvStopVibrateHaptic(
+      const Tainted<GamepadHandle>& aHandle);
+  mozilla::ipc::IPCResult RecvLightIndicatorColor(
+      const Tainted<GamepadHandle>& aHandle,
+      const Tainted<uint32_t>& aLightColorIndex, const uint8_t& aRed,
+      const uint8_t& aGreen, const uint8_t& aBlue, const uint32_t& aPromiseID);
+  void DispatchUpdateEvent(const GamepadChangeEvent& aEvent);
+
+  GamepadEventChannelParent(const GamepadEventChannelParent&) = delete;
+  GamepadEventChannelParent(GamepadEventChannelParent&&) = delete;
+  GamepadEventChannelParent& operator=(const GamepadEventChannelParent&) =
+      delete;
+  GamepadEventChannelParent& operator=(GamepadEventChannelParent&&) = delete;
+
+ private:
+  GamepadEventChannelParent();
+  ~GamepadEventChannelParent() = default;
+
+  bool mIsShutdown;
+  nsCOMPtr<nsIEventTarget> mBackgroundEventTarget;
+};
+
+}  // namespace mozilla::dom
+
+#endif
diff --git a/dom/gamepad/ipc/GamepadEventTypes.ipdlh b/dom/gamepad/ipc/GamepadEventTypes.ipdlh
new file mode 100644
index 0000000000..4ac1d7dc93
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadEventTypes.ipdlh
@@ -0,0 +1,78 @@
+/* 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 "mozilla/dom/GamepadMessageUtils.h";
+
+using mozilla::dom::GamepadPoseState from "mozilla/dom/GamepadPoseState.h";
+using mozilla::dom::GamepadTouchState from "mozilla/dom/GamepadTouchState.h";
+using mozilla::dom::GamepadLightIndicatorType from "mozilla/dom/GamepadLightIndicatorBinding.h";
+using mozilla::dom::GamepadMappingType from "mozilla/dom/GamepadBinding.h";
+using mozilla::dom::GamepadHand from "mozilla/dom/GamepadBinding.h";
+using mozilla::dom::GamepadHandle from "mozilla/dom/GamepadHandle.h";
+
+namespace mozilla {
+namespace dom {
+
+struct GamepadAdded {
+  nsString id;
+  GamepadMappingType mapping;
+  GamepadHand hand;
+  uint32_t display_id;
+  uint32_t num_buttons;
+  uint32_t num_axes;
+  uint32_t num_haptics;
+  uint32_t num_lights;
+  uint32_t num_touches;
+};
+
+struct GamepadRemoved {};
+
+struct GamepadAxisInformation {
+  uint32_t axis;
+  double value;
+};
+
+struct GamepadButtonInformation {
+  uint32_t button;
+  double value;
+  bool pressed;
+  bool touched;
+};
+
+struct GamepadPoseInformation {
+  GamepadPoseState pose_state;
+};
+
+struct GamepadLightIndicatorTypeInformation {
+  uint32_t light;
+  GamepadLightIndicatorType type;
+};
+
+struct GamepadHandInformation {
+  GamepadHand hand;
+};
+
+struct GamepadTouchInformation {
+  uint32_t index;
+  GamepadTouchState touch_state;
+};
+
+union GamepadChangeEventBody {
+  GamepadAdded;
+  GamepadRemoved;
+  GamepadAxisInformation;
+  GamepadButtonInformation;
+  GamepadHandInformation;
+  GamepadLightIndicatorTypeInformation;
+  GamepadPoseInformation;
+  GamepadTouchInformation;
+};
+
+struct GamepadChangeEvent {
+  GamepadHandle handle;
+  GamepadChangeEventBody body;
+};
+
+} // namespace dom
+} // namespace mozilla
\ No newline at end of file
diff --git a/dom/gamepad/ipc/GamepadMessageUtils.h b/dom/gamepad/ipc/GamepadMessageUtils.h
new file mode 100644
index 0000000000..c29293d3a5
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadMessageUtils.h
@@ -0,0 +1,154 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_gamepad_GamepadMessageUtils_h
+#define mozilla_dom_gamepad_GamepadMessageUtils_h
+
+#include "ipc/EnumSerializer.h"
+#include "mozilla/dom/GamepadBinding.h"
+#include "mozilla/dom/GamepadHandle.h"
+#include "mozilla/dom/GamepadLightIndicatorBinding.h"
+#include "mozilla/dom/GamepadPoseState.h"
+#include "mozilla/dom/GamepadTouchState.h"
+
+namespace IPC {
+
+template <>
+struct ParamTraits<mozilla::dom::GamepadLightIndicatorType>
+    : public ContiguousEnumSerializer<
+          mozilla::dom::GamepadLightIndicatorType,
+          mozilla::dom::GamepadLightIndicatorType(0),
+          mozilla::dom::GamepadLightIndicatorType(
+              mozilla::dom::GamepadLightIndicatorType::EndGuard_)> {};
+
+template <>
+struct ParamTraits<mozilla::dom::GamepadMappingType>
+    : public ContiguousEnumSerializer<
+          mozilla::dom::GamepadMappingType, mozilla::dom::GamepadMappingType(0),
+          mozilla::dom::GamepadMappingType(
+              mozilla::dom::GamepadMappingType::EndGuard_)> {};
+
+template <>
+struct ParamTraits<mozilla::dom::GamepadHand>
+    : public ContiguousEnumSerializer<
+          mozilla::dom::GamepadHand, mozilla::dom::GamepadHand(0),
+          mozilla::dom::GamepadHand(mozilla::dom::GamepadHand::EndGuard_)> {};
+
+template <>
+struct ParamTraits<mozilla::dom::GamepadCapabilityFlags>
+    : public BitFlagsEnumSerializer<
+          mozilla::dom::GamepadCapabilityFlags,
+          mozilla::dom::GamepadCapabilityFlags::Cap_All> {};
+
+template <>
+struct ParamTraits<mozilla::dom::GamepadPoseState> {
+  typedef mozilla::dom::GamepadPoseState paramType;
+
+  static void Write(MessageWriter* aWriter, const paramType& aParam) {
+    WriteParam(aWriter, aParam.flags);
+    WriteParam(aWriter, aParam.orientation[0]);
+    WriteParam(aWriter, aParam.orientation[1]);
+    WriteParam(aWriter, aParam.orientation[2]);
+    WriteParam(aWriter, aParam.orientation[3]);
+    WriteParam(aWriter, aParam.position[0]);
+    WriteParam(aWriter, aParam.position[1]);
+    WriteParam(aWriter, aParam.position[2]);
+    WriteParam(aWriter, aParam.angularVelocity[0]);
+    WriteParam(aWriter, aParam.angularVelocity[1]);
+    WriteParam(aWriter, aParam.angularVelocity[2]);
+    WriteParam(aWriter, aParam.angularAcceleration[0]);
+    WriteParam(aWriter, aParam.angularAcceleration[1]);
+    WriteParam(aWriter, aParam.angularAcceleration[2]);
+    WriteParam(aWriter, aParam.linearVelocity[0]);
+    WriteParam(aWriter, aParam.linearVelocity[1]);
+    WriteParam(aWriter, aParam.linearVelocity[2]);
+    WriteParam(aWriter, aParam.linearAcceleration[0]);
+    WriteParam(aWriter, aParam.linearAcceleration[1]);
+    WriteParam(aWriter, aParam.linearAcceleration[2]);
+    WriteParam(aWriter, aParam.isPositionValid);
+    WriteParam(aWriter, aParam.isOrientationValid);
+  }
+
+  static bool Read(MessageReader* aReader, paramType* aResult) {
+    if (!ReadParam(aReader, &(aResult->flags)) ||
+        !ReadParam(aReader, &(aResult->orientation[0])) ||
+        !ReadParam(aReader, &(aResult->orientation[1])) ||
+        !ReadParam(aReader, &(aResult->orientation[2])) ||
+        !ReadParam(aReader, &(aResult->orientation[3])) ||
+        !ReadParam(aReader, &(aResult->position[0])) ||
+        !ReadParam(aReader, &(aResult->position[1])) ||
+        !ReadParam(aReader, &(aResult->position[2])) ||
+        !ReadParam(aReader, &(aResult->angularVelocity[0])) ||
+        !ReadParam(aReader, &(aResult->angularVelocity[1])) ||
+        !ReadParam(aReader, &(aResult->angularVelocity[2])) ||
+        !ReadParam(aReader, &(aResult->angularAcceleration[0])) ||
+        !ReadParam(aReader, &(aResult->angularAcceleration[1])) ||
+        !ReadParam(aReader, &(aResult->angularAcceleration[2])) ||
+        !ReadParam(aReader, &(aResult->linearVelocity[0])) ||
+        !ReadParam(aReader, &(aResult->linearVelocity[1])) ||
+        !ReadParam(aReader, &(aResult->linearVelocity[2])) ||
+        !ReadParam(aReader, &(aResult->linearAcceleration[0])) ||
+        !ReadParam(aReader, &(aResult->linearAcceleration[1])) ||
+        !ReadParam(aReader, &(aResult->linearAcceleration[2])) ||
+        !ReadParam(aReader, &(aResult->isPositionValid)) ||
+        !ReadParam(aReader, &(aResult->isOrientationValid))) {
+      return false;
+    }
+    return true;
+  }
+};
+
+template <>
+struct ParamTraits<mozilla::dom::GamepadTouchState> {
+  typedef mozilla::dom::GamepadTouchState paramType;
+
+  static void Write(MessageWriter* aWriter, const paramType& aParam) {
+    WriteParam(aWriter, aParam.touchId);
+    WriteParam(aWriter, aParam.surfaceId);
+    WriteParam(aWriter, aParam.position[0]);
+    WriteParam(aWriter, aParam.position[1]);
+    WriteParam(aWriter, aParam.surfaceDimensions[0]);
+    WriteParam(aWriter, aParam.surfaceDimensions[1]);
+    WriteParam(aWriter, aParam.isSurfaceDimensionsValid);
+  }
+
+  static bool Read(MessageReader* aReader, paramType* aResult) {
+    if (!ReadParam(aReader, &(aResult->touchId)) ||
+        !ReadParam(aReader, &(aResult->surfaceId)) ||
+        !ReadParam(aReader, &(aResult->position[0])) ||
+        !ReadParam(aReader, &(aResult->position[1])) ||
+        !ReadParam(aReader, &(aResult->surfaceDimensions[0])) ||
+        !ReadParam(aReader, &(aResult->surfaceDimensions[1])) ||
+        !ReadParam(aReader, &(aResult->isSurfaceDimensionsValid))) {
+      return false;
+    }
+    return true;
+  }
+};
+
+template <>
+struct ParamTraits<mozilla::dom::GamepadHandleKind>
+    : public ContiguousEnumSerializerInclusive<
+          mozilla::dom::GamepadHandleKind,
+          mozilla::dom::GamepadHandleKind::GamepadPlatformManager,
+          mozilla::dom::GamepadHandleKind::VR> {};
+
+template <>
+struct ParamTraits<mozilla::dom::GamepadHandle> {
+  typedef mozilla::dom::GamepadHandle paramType;
+  static void Write(MessageWriter* aWriter, const paramType& aParam) {
+    WriteParam(aWriter, aParam.mValue);
+    WriteParam(aWriter, aParam.mKind);
+  }
+  static bool Read(MessageReader* aReader, paramType* aParam) {
+    return ReadParam(aReader, &aParam->mValue) &&
+           ReadParam(aReader, &aParam->mKind);
+  }
+};
+
+}  // namespace IPC
+
+#endif  // mozilla_dom_gamepad_GamepadMessageUtils_h
diff --git a/dom/gamepad/ipc/GamepadTestChannelChild.cpp b/dom/gamepad/ipc/GamepadTestChannelChild.cpp
new file mode 100644
index 0000000000..d74e0736ce
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadTestChannelChild.cpp
@@ -0,0 +1,34 @@
+/* -*- 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 "GamepadTestChannelChild.h"
+
+#include "mozilla/dom/GamepadServiceTest.h"
+
+namespace mozilla::dom {
+
+already_AddRefed<GamepadTestChannelChild> GamepadTestChannelChild::Create(
+    GamepadServiceTest* aGamepadServiceTest) {
+  return RefPtr<GamepadTestChannelChild>(
+             new GamepadTestChannelChild(aGamepadServiceTest))
+      .forget();
+}
+
+GamepadTestChannelChild::GamepadTestChannelChild(
+    GamepadServiceTest* aGamepadServiceTest)
+    : mGamepadServiceTest(aGamepadServiceTest) {}
+
+mozilla::ipc::IPCResult GamepadTestChannelChild::RecvReplyGamepadHandle(
+    const uint32_t& aID, const GamepadHandle& aHandle) {
+  MOZ_RELEASE_ASSERT(
+      mGamepadServiceTest,
+      "Test channel should never outlive the owning GamepadServiceTest");
+
+  mGamepadServiceTest->ReplyGamepadHandle(aID, aHandle);
+  return IPC_OK();
+}
+
+}  // namespace mozilla::dom
diff --git a/dom/gamepad/ipc/GamepadTestChannelChild.h b/dom/gamepad/ipc/GamepadTestChannelChild.h
new file mode 100644
index 0000000000..26d499ff8a
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadTestChannelChild.h
@@ -0,0 +1,45 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_GamepadTestChannelChild_h_
+#define mozilla_dom_GamepadTestChannelChild_h_
+
+#include "mozilla/dom/PGamepadTestChannelChild.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/WeakPtr.h"
+#include "nsRefPtrHashtable.h"
+
+namespace mozilla::dom {
+
+class GamepadServiceTest;
+
+class GamepadTestChannelChild final : public PGamepadTestChannelChild {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GamepadTestChannelChild)
+
+  static already_AddRefed<GamepadTestChannelChild> Create(
+      GamepadServiceTest* aGamepadServiceTest);
+
+  GamepadTestChannelChild(const GamepadTestChannelChild&) = delete;
+  GamepadTestChannelChild(GamepadTestChannelChild&&) = delete;
+  GamepadTestChannelChild& operator=(const GamepadTestChannelChild&) = delete;
+  GamepadTestChannelChild& operator=(GamepadTestChannelChild&&) = delete;
+
+ private:
+  explicit GamepadTestChannelChild(GamepadServiceTest* aGamepadServiceTest);
+  ~GamepadTestChannelChild() = default;
+
+  mozilla::ipc::IPCResult RecvReplyGamepadHandle(const uint32_t& aID,
+                                                 const GamepadHandle& aHandle);
+
+  WeakPtr<GamepadServiceTest> mGamepadServiceTest;
+
+  friend class PGamepadTestChannelChild;
+};
+
+}  // namespace mozilla::dom
+
+#endif
diff --git a/dom/gamepad/ipc/GamepadTestChannelParent.cpp b/dom/gamepad/ipc/GamepadTestChannelParent.cpp
new file mode 100644
index 0000000000..1c8d67491e
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadTestChannelParent.cpp
@@ -0,0 +1,129 @@
+/* -*- 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 "GamepadTestChannelParent.h"
+
+#include "mozilla/dom/GamepadPlatformService.h"
+#include "mozilla/ipc/BackgroundParent.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "mozilla/Unused.h"
+
+namespace mozilla::dom {
+
+already_AddRefed<GamepadTestChannelParent> GamepadTestChannelParent::Create() {
+  // Refuse to create the parent actor if this pref is disabled
+  if (!StaticPrefs::dom_gamepad_test_enabled()) {
+    return nullptr;
+  }
+
+  return RefPtr<GamepadTestChannelParent>(new GamepadTestChannelParent())
+      .forget();
+}
+
+GamepadTestChannelParent::GamepadTestChannelParent() {
+  ::mozilla::ipc::AssertIsOnBackgroundThread();
+  GamepadMonitoringState::GetSingleton().AddObserver(this);
+}
+
+GamepadTestChannelParent::~GamepadTestChannelParent() {
+  ::mozilla::ipc::AssertIsOnBackgroundThread();
+  GamepadMonitoringState::GetSingleton().RemoveObserver(this);
+}
+
+void GamepadTestChannelParent::AddGamepadToPlatformService(
+    uint32_t aPromiseId, const GamepadAdded& aGamepadAdded) {
+  mozilla::ipc::AssertIsOnBackgroundThread();
+
+  RefPtr<GamepadPlatformService> service =
+      GamepadPlatformService::GetParentService();
+  MOZ_ASSERT(service);
+
+  const GamepadAdded& a = aGamepadAdded;
+  nsCString gamepadID;
+  LossyCopyUTF16toASCII(a.id(), gamepadID);
+  GamepadHandle handle = service->AddGamepad(
+      gamepadID.get(), static_cast<GamepadMappingType>(a.mapping()), a.hand(),
+      a.num_buttons(), a.num_axes(), a.num_haptics(), a.num_lights(),
+      a.num_touches());
+
+  Unused << SendReplyGamepadHandle(aPromiseId, handle);
+}
+
+void GamepadTestChannelParent::OnMonitoringStateChanged(bool aNewState) {
+  mozilla::ipc::AssertIsOnBackgroundThread();
+
+  if (aNewState) {
+    for (auto& deferredGamepadAdd : mDeferredGamepadAdded) {
+      AddGamepadToPlatformService(deferredGamepadAdd.promiseId,
+                                  deferredGamepadAdd.gamepadAdded);
+    }
+    mDeferredGamepadAdded.Clear();
+  }
+}
+
+mozilla::ipc::IPCResult GamepadTestChannelParent::RecvGamepadTestEvent(
+    const uint32_t& aID, const GamepadChangeEvent& aEvent) {
+  mozilla::ipc::AssertIsOnBackgroundThread();
+
+  RefPtr<GamepadPlatformService> service =
+      GamepadPlatformService::GetParentService();
+  MOZ_ASSERT(service);
+
+  const GamepadChangeEventBody& body = aEvent.body();
+
+  // GamepadAdded is special because it will be deferred if monitoring hasn't
+  // started. Everything else won't be deferred and will fail if monitoring
+  // isn't running
+  if (body.type() == GamepadChangeEventBody::TGamepadAdded) {
+    if (GamepadMonitoringState::GetSingleton().IsMonitoring()) {
+      AddGamepadToPlatformService(aID, body.get_GamepadAdded());
+    } else {
+      mDeferredGamepadAdded.AppendElement(
+          DeferredGamepadAdded{aID, body.get_GamepadAdded()});
+    }
+    return IPC_OK();
+  }
+
+  if (!GamepadMonitoringState::GetSingleton().IsMonitoring()) {
+    return IPC_FAIL(this, "Simulated message received while not monitoring");
+  }
+
+  GamepadHandle handle = aEvent.handle();
+
+  switch (body.type()) {
+    case GamepadChangeEventBody::TGamepadRemoved:
+      service->RemoveGamepad(handle);
+      break;
+    case GamepadChangeEventBody::TGamepadButtonInformation: {
+      const GamepadButtonInformation& a = body.get_GamepadButtonInformation();
+      service->NewButtonEvent(handle, a.button(), a.pressed(), a.touched(),
+                              a.value());
+      break;
+    }
+    case GamepadChangeEventBody::TGamepadAxisInformation: {
+      const GamepadAxisInformation& a = body.get_GamepadAxisInformation();
+      service->NewAxisMoveEvent(handle, a.axis(), a.value());
+      break;
+    }
+    case GamepadChangeEventBody::TGamepadPoseInformation: {
+      const GamepadPoseInformation& a = body.get_GamepadPoseInformation();
+      service->NewPoseEvent(handle, a.pose_state());
+      break;
+    }
+    case GamepadChangeEventBody::TGamepadTouchInformation: {
+      const GamepadTouchInformation& a = body.get_GamepadTouchInformation();
+      service->NewMultiTouchEvent(handle, a.index(), a.touch_state());
+      break;
+    }
+    default:
+      NS_WARNING("Unknown event type.");
+      return IPC_FAIL_NO_REASON(this);
+  }
+  Unused << SendReplyGamepadHandle(aID, handle);
+  return IPC_OK();
+}
+
+}  // namespace mozilla::dom
diff --git a/dom/gamepad/ipc/GamepadTestChannelParent.h b/dom/gamepad/ipc/GamepadTestChannelParent.h
new file mode 100644
index 0000000000..03567727e2
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadTestChannelParent.h
@@ -0,0 +1,49 @@
+/* -*- 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 "mozilla/dom/PGamepadTestChannelParent.h"
+#include "mozilla/WeakPtr.h"
+
+#ifndef mozilla_dom_GamepadTestChannelParent_h_
+#  define mozilla_dom_GamepadTestChannelParent_h_
+
+namespace mozilla::dom {
+
+class GamepadTestChannelParent final : public PGamepadTestChannelParent,
+                                       public SupportsWeakPtr {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GamepadTestChannelParent)
+
+  static already_AddRefed<GamepadTestChannelParent> Create();
+
+  mozilla::ipc::IPCResult RecvGamepadTestEvent(
+      const uint32_t& aID, const GamepadChangeEvent& aGamepadEvent);
+
+  void OnMonitoringStateChanged(bool aNewState);
+
+  GamepadTestChannelParent(const GamepadTestChannelParent&) = delete;
+  GamepadTestChannelParent(GamepadTestChannelParent&&) = delete;
+  GamepadTestChannelParent& operator=(const GamepadTestChannelParent&) = delete;
+  GamepadTestChannelParent& operator=(GamepadTestChannelParent&&) = delete;
+
+ private:
+  struct DeferredGamepadAdded {
+    uint32_t promiseId;
+    GamepadAdded gamepadAdded;
+  };
+
+  GamepadTestChannelParent();
+  ~GamepadTestChannelParent();
+
+  void AddGamepadToPlatformService(uint32_t aPromiseId,
+                                   const GamepadAdded& aGamepadAdded);
+
+  nsTArray<DeferredGamepadAdded> mDeferredGamepadAdded;
+};
+
+}  // namespace mozilla::dom
+
+#endif
diff --git a/dom/gamepad/ipc/PGamepadEventChannel.ipdl b/dom/gamepad/ipc/PGamepadEventChannel.ipdl
new file mode 100644
index 0000000000..dba6725bd4
--- /dev/null
+++ b/dom/gamepad/ipc/PGamepadEventChannel.ipdl
@@ -0,0 +1,31 @@
+/* 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 protocol PBackground;
+include "mozilla/dom/GamepadMessageUtils.h";
+include GamepadEventTypes;
+
+using mozilla::dom::GamepadHandle from "mozilla/dom/GamepadHandle.h";
+
+namespace mozilla {
+namespace dom {
+
+protocol PGamepadEventChannel {
+  manager PBackground;
+  parent:
+    async __delete__();
+
+    [Tainted] async VibrateHaptic(GamepadHandle aHandle, uint32_t aHapticIndex,
+                                  double aIntensity, double aDuration, [NoTaint=passback] uint32_t aPromiseID);
+    [Tainted] async StopVibrateHaptic(GamepadHandle aHandle);
+    [Tainted] async LightIndicatorColor(GamepadHandle aHandle, uint32_t aLightColorIndex,
+                                        [NoTaint=allvalid] uint8_t aRed, [NoTaint=allvalid] uint8_t aGreen,
+                                        [NoTaint=allvalid] uint8_t aBlue, [NoTaint=passback] uint32_t aPromiseID);
+
+  child:
+    async GamepadUpdate(GamepadChangeEvent aGamepadEvent);
+    async ReplyGamepadPromise(uint32_t aPromiseID);
+};
+
+}
+}
diff --git a/dom/gamepad/ipc/PGamepadTestChannel.ipdl b/dom/gamepad/ipc/PGamepadTestChannel.ipdl
new file mode 100644
index 0000000000..2be0819491
--- /dev/null
+++ b/dom/gamepad/ipc/PGamepadTestChannel.ipdl
@@ -0,0 +1,23 @@
+/* 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 protocol PBackground;
+include "mozilla/dom/GamepadMessageUtils.h";
+include GamepadEventTypes;
+
+using mozilla::dom::GamepadHandle from "mozilla/dom/GamepadHandle.h";
+
+namespace mozilla {
+namespace dom {
+
+protocol PGamepadTestChannel {
+  manager PBackground;
+  parent:
+    async GamepadTestEvent(uint32_t aID, GamepadChangeEvent aGamepadEvent);
+    async __delete__();
+  child:
+    async ReplyGamepadHandle(uint32_t aID, GamepadHandle aHandle);
+};
+
+}
+}