mirror of
https://github.com/mozilla/gecko-dev.git
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157 lines
4.2 KiB
C++
157 lines
4.2 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsIDOMClassInfo.h"
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#include "nsIDOMEvent.h"
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#include "nsIDOMEventListener.h"
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#include "nsPIDOMWindow.h"
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#include "nsIDocShell.h"
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#include "nsIPermissionManager.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "AudioChannelManager.h"
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#include "mozilla/dom/AudioChannelManagerBinding.h"
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#include "mozilla/Services.h"
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using namespace mozilla::hal;
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namespace mozilla {
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namespace dom {
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namespace system {
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NS_IMPL_QUERY_INTERFACE_INHERITED(AudioChannelManager, DOMEventTargetHelper,
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nsIDOMEventListener)
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NS_IMPL_ADDREF_INHERITED(AudioChannelManager, DOMEventTargetHelper)
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NS_IMPL_RELEASE_INHERITED(AudioChannelManager, DOMEventTargetHelper)
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AudioChannelManager::AudioChannelManager()
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: mState(SWITCH_STATE_UNKNOWN)
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, mVolumeChannel(-1)
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{
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RegisterSwitchObserver(SWITCH_HEADPHONES, this);
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mState = GetCurrentSwitchState(SWITCH_HEADPHONES);
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}
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AudioChannelManager::~AudioChannelManager()
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{
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UnregisterSwitchObserver(SWITCH_HEADPHONES, this);
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nsCOMPtr<EventTarget> target = do_QueryInterface(GetOwner());
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NS_ENSURE_TRUE_VOID(target);
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target->RemoveSystemEventListener(NS_LITERAL_STRING("visibilitychange"),
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this,
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/* useCapture = */ true);
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}
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void
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AudioChannelManager::Init(nsPIDOMWindow* aWindow)
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{
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BindToOwner(aWindow->IsOuterWindow() ?
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aWindow->GetCurrentInnerWindow() : aWindow);
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nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(GetOwner());
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NS_ENSURE_TRUE_VOID(target);
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target->AddSystemEventListener(NS_LITERAL_STRING("visibilitychange"),
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this,
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/* useCapture = */ true,
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/* wantsUntrusted = */ false);
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}
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JSObject*
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AudioChannelManager::WrapObject(JSContext* aCx)
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{
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return AudioChannelManagerBinding::Wrap(aCx, this);
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}
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void
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AudioChannelManager::Notify(const SwitchEvent& aEvent)
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{
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mState = aEvent.status();
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DispatchTrustedEvent(NS_LITERAL_STRING("headphoneschange"));
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}
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bool
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AudioChannelManager::SetVolumeControlChannel(const nsAString& aChannel)
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{
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if (aChannel.EqualsASCII("publicnotification")) {
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return false;
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}
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AudioChannel newChannel = AudioChannelService::GetAudioChannel(aChannel);
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// Only normal channel doesn't need permission.
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if (newChannel != AudioChannel::Normal) {
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nsCOMPtr<nsIPermissionManager> permissionManager =
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services::GetPermissionManager();
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if (!permissionManager) {
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return false;
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}
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uint32_t perm = nsIPermissionManager::UNKNOWN_ACTION;
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permissionManager->TestPermissionFromWindow(GetOwner(),
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nsCString(NS_LITERAL_CSTRING("audio-channel-") +
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NS_ConvertUTF16toUTF8(aChannel)).get(), &perm);
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if (perm != nsIPermissionManager::ALLOW_ACTION) {
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return false;
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}
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}
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if (mVolumeChannel == (int32_t)newChannel) {
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return true;
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}
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mVolumeChannel = (int32_t)newChannel;
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NotifyVolumeControlChannelChanged();
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return true;
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}
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bool
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AudioChannelManager::GetVolumeControlChannel(nsAString & aChannel)
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{
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if (mVolumeChannel >= 0) {
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AudioChannelService::GetAudioChannelString(
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static_cast<AudioChannel>(mVolumeChannel),
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aChannel);
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} else {
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aChannel.AssignASCII("");
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}
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return true;
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}
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void
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AudioChannelManager::NotifyVolumeControlChannelChanged()
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{
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nsCOMPtr<nsIDocShell> docshell = do_GetInterface(GetOwner());
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NS_ENSURE_TRUE_VOID(docshell);
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bool isActive = false;
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docshell->GetIsActive(&isActive);
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AudioChannelService* service = AudioChannelService::GetOrCreateAudioChannelService();
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if (isActive) {
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service->SetDefaultVolumeControlChannel(mVolumeChannel, isActive);
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} else {
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service->SetDefaultVolumeControlChannel(-1, isActive);
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}
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}
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NS_IMETHODIMP
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AudioChannelManager::HandleEvent(nsIDOMEvent* aEvent)
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{
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nsAutoString type;
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aEvent->GetType(type);
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if (type.EqualsLiteral("visibilitychange")) {
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NotifyVolumeControlChannelChanged();
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}
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return NS_OK;
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}
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} // namespace system
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} // namespace dom
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} // namespace mozilla
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