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/* 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/Unused.h"
#include "mozilla/dom/GamepadMonitoring.h"
#include "mozilla/ipc/BackgroundParent.h"
#include "nsThreadUtils.h"
namespace mozilla {
namespace dom {
using namespace mozilla::ipc;
namespace {
class SendGamepadUpdateRunnable final : public Runnable
{
private:
~SendGamepadUpdateRunnable() {}
RefPtr<GamepadEventChannelParent> mParent;
GamepadChangeEvent mEvent;
public:
SendGamepadUpdateRunnable(GamepadEventChannelParent* aParent,
GamepadChangeEvent aEvent)
: mEvent(aEvent)
{
MOZ_ASSERT(aParent);
mParent = aParent;
}
NS_IMETHOD Run() override
{
AssertIsOnBackgroundThread();
if(mParent->HasGamepadListener()) {
Unused << mParent->SendGamepadUpdate(mEvent);
}
return NS_OK;
}
};
} // namespace
GamepadEventChannelParent::GamepadEventChannelParent()
: mHasGamepadListener(false)
{
RefPtr<GamepadPlatformService> service =
GamepadPlatformService::GetParentService();
MOZ_ASSERT(service);
service->AddChannelParent(this);
mBackgroundThread = NS_GetCurrentThread();
}
bool
GamepadEventChannelParent::RecvGamepadListenerAdded()
{
AssertIsOnBackgroundThread();
MOZ_ASSERT(!mHasGamepadListener);
mHasGamepadListener = true;
StartGamepadMonitoring();
return true;
}
bool
GamepadEventChannelParent::RecvGamepadListenerRemoved()
{
AssertIsOnBackgroundThread();
MOZ_ASSERT(mHasGamepadListener);
mHasGamepadListener = false;
RefPtr<GamepadPlatformService> service =
GamepadPlatformService::GetParentService();
MOZ_ASSERT(service);
service->RemoveChannelParent(this);
Unused << Send__delete__(this);
return true;
}
void
GamepadEventChannelParent::ActorDestroy(ActorDestroyReason aWhy)
{
AssertIsOnBackgroundThread();
// It may be called because IPDL child side crashed, we'll
// not receive RecvGamepadListenerRemoved in that case
if (mHasGamepadListener) {
mHasGamepadListener = false;
RefPtr<GamepadPlatformService> service =
GamepadPlatformService::GetParentService();
MOZ_ASSERT(service);
service->RemoveChannelParent(this);
}
MaybeStopGamepadMonitoring();
}
void
GamepadEventChannelParent::DispatchUpdateEvent(const GamepadChangeEvent& aEvent)
{
mBackgroundThread->Dispatch(new SendGamepadUpdateRunnable(this, aEvent),
NS_DISPATCH_NORMAL);
}
} // namespace dom
} // namespace mozilla
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