1 files changed, 116 insertions, 0 deletions
diff --git a/dom/gamepad/ipc/GamepadEventChannelParent.cpp b/dom/gamepad/ipc/GamepadEventChannelParent.cpp
new file mode 100644
index 0000000000..910650529f
--- /dev/null
+++ b/dom/gamepad/ipc/GamepadEventChannelParent.cpp
@@ -0,0 +1,116 @@
+/* -*- 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 = GetCurrentEventTarget();
+
+  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 Tainted<uint32_t>& aPromiseID) {
+  // TODO: Bug 680289, implement for standard gamepads
+
+  // TODO: simplify tainted validation, see 1610570
+  if (SendReplyGamepadPromise(MOZ_NO_VALIDATE(
+          aPromiseID,
+          "This value is unused aside from being passed back to the child."))) {
+    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 Tainted<uint8_t>& aRed,
+    const Tainted<uint8_t>& aGreen, const Tainted<uint8_t>& aBlue,
+    const Tainted<uint32_t>& aPromiseID) {
+  SetGamepadLightIndicatorColor(aHandle, aLightColorIndex, aRed, aGreen, aBlue);
+
+  // TODO: simplify tainted validation, see 1610570
+  if (SendReplyGamepadPromise(MOZ_NO_VALIDATE(
+          aPromiseID,
+          "This value is unused aside from being passed back to the child."))) {
+    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