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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 "nsIDocument.h"
#include "nsIDOMClassInfo.h"
#include "nsIDOMEvent.h"
#include "nsIDOMEventListener.h"
#include "nsPIDOMWindow.h"
#include "nsIDocShell.h"
#include "nsIPermissionManager.h"
#include "nsIInterfaceRequestorUtils.h"
#include "AudioChannelManager.h"
#include "mozilla/dom/AudioChannelManagerBinding.h"
#include "mozilla/dom/nsBrowserElement.h"
#include "mozilla/Services.h"
namespace mozilla {
namespace dom {
namespace system {
NS_IMPL_QUERY_INTERFACE_INHERITED(AudioChannelManager, DOMEventTargetHelper,
nsIDOMEventListener)
NS_IMPL_ADDREF_INHERITED(AudioChannelManager, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(AudioChannelManager, DOMEventTargetHelper)
AudioChannelManager::AudioChannelManager()
: mVolumeChannel(-1)
{
hal::RegisterSwitchObserver(hal::SWITCH_HEADPHONES, this);
}
AudioChannelManager::~AudioChannelManager()
{
hal::UnregisterSwitchObserver(hal::SWITCH_HEADPHONES, this);
nsCOMPtr<EventTarget> target = do_QueryInterface(GetOwner());
NS_ENSURE_TRUE_VOID(target);
target->RemoveSystemEventListener(NS_LITERAL_STRING("visibilitychange"),
this,
/* useCapture = */ true);
}
void
AudioChannelManager::Init(nsPIDOMWindowInner* aWindow)
{
BindToOwner(aWindow);
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(GetOwner());
NS_ENSURE_TRUE_VOID(target);
target->AddSystemEventListener(NS_LITERAL_STRING("visibilitychange"),
this,
/* useCapture = */ true,
/* wantsUntrusted = */ false);
}
JSObject*
AudioChannelManager::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return AudioChannelManagerBinding::Wrap(aCx, this, aGivenProto);
}
void
AudioChannelManager::Notify(const hal::SwitchEvent& aEvent)
{
mState = Some(aEvent.status());
DispatchTrustedEvent(NS_LITERAL_STRING("headphoneschange"));
}
bool
AudioChannelManager::SetVolumeControlChannel(const nsAString& aChannel)
{
if (aChannel.EqualsASCII("publicnotification")) {
return false;
}
AudioChannel newChannel = AudioChannelService::GetAudioChannel(aChannel);
// Only normal channel doesn't need permission.
if (newChannel != AudioChannel::Normal) {
nsCOMPtr<nsIPermissionManager> permissionManager =
services::GetPermissionManager();
if (!permissionManager) {
return false;
}
uint32_t perm = nsIPermissionManager::UNKNOWN_ACTION;
permissionManager->TestPermissionFromWindow(GetOwner(),
nsCString(NS_LITERAL_CSTRING("audio-channel-") +
NS_ConvertUTF16toUTF8(aChannel)).get(), &perm);
if (perm != nsIPermissionManager::ALLOW_ACTION) {
return false;
}
}
if (mVolumeChannel == (int32_t)newChannel) {
return true;
}
mVolumeChannel = (int32_t)newChannel;
NotifyVolumeControlChannelChanged();
return true;
}
bool
AudioChannelManager::GetVolumeControlChannel(nsAString & aChannel)
{
if (mVolumeChannel >= 0) {
AudioChannelService::GetAudioChannelString(
static_cast<AudioChannel>(mVolumeChannel),
aChannel);
} else {
aChannel.AssignASCII("");
}
return true;
}
void
AudioChannelManager::NotifyVolumeControlChannelChanged()
{
nsCOMPtr<nsIDocShell> docshell = do_GetInterface(GetOwner());
NS_ENSURE_TRUE_VOID(docshell);
bool isActive = false;
docshell->GetIsActive(&isActive);
RefPtr<AudioChannelService> service = AudioChannelService::GetOrCreate();
if (!service) {
return;
}
if (isActive) {
service->SetDefaultVolumeControlChannel(mVolumeChannel, isActive);
} else {
service->SetDefaultVolumeControlChannel(-1, isActive);
}
}
NS_IMETHODIMP
AudioChannelManager::HandleEvent(nsIDOMEvent* aEvent)
{
nsAutoString type;
aEvent->GetType(type);
if (type.EqualsLiteral("visibilitychange")) {
NotifyVolumeControlChannelChanged();
}
return NS_OK;
}
void
AudioChannelManager::GetAllowedAudioChannels(
nsTArray<RefPtr<BrowserElementAudioChannel>>& aAudioChannels,
ErrorResult& aRv)
{
MOZ_ASSERT(aAudioChannels.IsEmpty());
// Only main process is supported.
if (XRE_GetProcessType() != GeckoProcessType_Default) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
nsCOMPtr<nsPIDOMWindowInner> window = GetOwner();
if (NS_WARN_IF(!window)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
nsBrowserElement::GenerateAllowedAudioChannels(window, nullptr, nullptr,
aAudioChannels, aRv);
NS_WARNING_ASSERTION(!aRv.Failed(), "GenerateAllowedAudioChannels failed");
}
} // namespace system
} // namespace dom
} // namespace mozilla
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