gecko-dev/dom/tv/TVManager.cpp

124 lines
3.1 KiB
C++

/* -*- 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/Promise.h"
#include "mozilla/dom/TVManagerBinding.h"
#include "mozilla/dom/TVServiceCallbacks.h"
#include "mozilla/dom/TVServiceFactory.h"
#include "mozilla/dom/TVTuner.h"
#include "nsITVService.h"
#include "nsServiceManagerUtils.h"
#include "TVManager.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_INHERITED(TVManager, DOMEventTargetHelper, mTVService,
mTuners, mPendingGetTunersPromises)
NS_IMPL_ADDREF_INHERITED(TVManager, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(TVManager, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TVManager)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
TVManager::TVManager(nsPIDOMWindow* aWindow)
: DOMEventTargetHelper(aWindow)
, mIsReady(false)
{
}
TVManager::~TVManager()
{
}
/* static */ already_AddRefed<TVManager>
TVManager::Create(nsPIDOMWindow* aWindow)
{
nsRefPtr<TVManager> manager = new TVManager(aWindow);
return (manager->Init()) ? manager.forget() : nullptr;
}
bool
TVManager::Init()
{
mTVService = TVServiceFactory::AutoCreateTVService();
NS_ENSURE_TRUE(mTVService, false);
nsCOMPtr<nsITVServiceCallback> callback = new TVServiceTunerGetterCallback(this);
nsresult rv = mTVService->GetTuners(callback);
NS_ENSURE_SUCCESS(rv, false);
return true;
}
/* virtual */ JSObject*
TVManager::WrapObject(JSContext* aCx)
{
return TVManagerBinding::Wrap(aCx, this);
}
nsresult
TVManager::SetTuners(const nsTArray<nsRefPtr<TVTuner>>& aTuners)
{
// Should be called only when TV Manager hasn't been ready yet.
if (mIsReady) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mTuners = aTuners;
mIsReady = true;
// Resolve pending promises.
uint32_t length = mPendingGetTunersPromises.Length();
for(uint32_t i = 0; i < length; i++) {
mPendingGetTunersPromises[i]->MaybeResolve(mTuners);
}
mPendingGetTunersPromises.Clear();
return NS_OK;
}
void
TVManager::RejectPendingGetTunersPromises(nsresult aRv)
{
// Reject pending promises.
uint32_t length = mPendingGetTunersPromises.Length();
for(uint32_t i = 0; i < length; i++) {
mPendingGetTunersPromises[i]->MaybeReject(aRv);
}
mPendingGetTunersPromises.Clear();
}
nsresult
TVManager::DispatchTVEvent(nsIDOMEvent* aEvent)
{
return DispatchTrustedEvent(aEvent);
}
already_AddRefed<Promise>
TVManager::GetTuners(ErrorResult& aRv)
{
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(GetOwner());
MOZ_ASSERT(global);
nsRefPtr<Promise> promise = Promise::Create(global, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
// Keep track of the promise when the manager hasn't been ready yet.
if (mIsReady) {
promise->MaybeResolve(mTuners);
} else {
mPendingGetTunersPromises.AppendElement(promise);
}
return promise.forget();
}
} // namespace dom
} // namespace mozilla