mirror of
https://github.com/classilla/tenfourfox.git
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259 lines
6.2 KiB
C++
259 lines
6.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "PresentationDeviceManager.h"
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#include "mozilla/Services.h"
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#include "MainThreadUtils.h"
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#include "nsCategoryCache.h"
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#include "nsCOMPtr.h"
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#include "nsIMutableArray.h"
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#include "nsIObserverService.h"
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#include "nsXULAppAPI.h"
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#include "PresentationSessionRequest.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_ISUPPORTS(PresentationDeviceManager,
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nsIPresentationDeviceManager,
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nsIPresentationDeviceListener,
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nsIObserver,
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nsISupportsWeakReference)
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PresentationDeviceManager::PresentationDeviceManager()
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{
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}
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PresentationDeviceManager::~PresentationDeviceManager()
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{
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UnloadDeviceProviders();
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mDevices.Clear();
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}
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void
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PresentationDeviceManager::Init()
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{
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nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
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if (obs) {
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obs->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
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}
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LoadDeviceProviders();
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}
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void
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PresentationDeviceManager::Shutdown()
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{
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nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
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if (obs) {
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obs->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
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}
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UnloadDeviceProviders();
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}
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void
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PresentationDeviceManager::LoadDeviceProviders()
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{
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MOZ_ASSERT(mProviders.IsEmpty());
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nsCategoryCache<nsIPresentationDeviceProvider> providerCache(PRESENTATION_DEVICE_PROVIDER_CATEGORY);
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providerCache.GetEntries(mProviders);
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for (uint32_t i = 0; i < mProviders.Length(); ++i) {
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mProviders[i]->SetListener(this);
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}
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}
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void
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PresentationDeviceManager::UnloadDeviceProviders()
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{
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for (uint32_t i = 0; i < mProviders.Length(); ++i) {
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mProviders[i]->SetListener(nullptr);
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}
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mProviders.Clear();
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}
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void
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PresentationDeviceManager::NotifyDeviceChange(nsIPresentationDevice* aDevice,
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const char16_t* aType)
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{
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nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
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if (obs) {
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obs->NotifyObservers(aDevice,
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PRESENTATION_DEVICE_CHANGE_TOPIC,
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aType);
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}
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}
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// nsIPresentationDeviceManager
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NS_IMETHODIMP
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PresentationDeviceManager::ForceDiscovery()
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{
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MOZ_ASSERT(NS_IsMainThread());
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for (uint32_t i = 0; i < mProviders.Length(); ++i) {
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mProviders[i]->ForceDiscovery();
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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PresentationDeviceManager::AddDeviceProvider(nsIPresentationDeviceProvider* aProvider)
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{
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NS_ENSURE_ARG(aProvider);
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MOZ_ASSERT(NS_IsMainThread());
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if (NS_WARN_IF(mProviders.Contains(aProvider))) {
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return NS_OK;
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}
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mProviders.AppendElement(aProvider);
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aProvider->SetListener(this);
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return NS_OK;
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}
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NS_IMETHODIMP
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PresentationDeviceManager::RemoveDeviceProvider(nsIPresentationDeviceProvider* aProvider)
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{
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NS_ENSURE_ARG(aProvider);
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MOZ_ASSERT(NS_IsMainThread());
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if (NS_WARN_IF(!mProviders.RemoveElement(aProvider))) {
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return NS_ERROR_FAILURE;
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}
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aProvider->SetListener(nullptr);
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return NS_OK;
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}
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NS_IMETHODIMP
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PresentationDeviceManager::GetDeviceAvailable(bool* aRetVal)
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{
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NS_ENSURE_ARG_POINTER(aRetVal);
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MOZ_ASSERT(NS_IsMainThread());
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*aRetVal = !mDevices.IsEmpty();
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return NS_OK;
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}
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NS_IMETHODIMP
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PresentationDeviceManager::GetAvailableDevices(nsIArray** aRetVal)
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{
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NS_ENSURE_ARG_POINTER(aRetVal);
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MOZ_ASSERT(NS_IsMainThread());
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// Bug 1194049: some providers may discontinue discovery after timeout.
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// Call |ForceDiscovery()| here to make sure device lists are updated.
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NS_DispatchToMainThread(
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NS_NewRunnableMethod(this, &PresentationDeviceManager::ForceDiscovery));
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nsCOMPtr<nsIMutableArray> devices = do_CreateInstance(NS_ARRAY_CONTRACTID);
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for (uint32_t i = 0; i < mDevices.Length(); ++i) {
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devices->AppendElement(mDevices[i], false);
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}
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devices.forget(aRetVal);
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return NS_OK;
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}
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// nsIPresentationDeviceListener
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NS_IMETHODIMP
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PresentationDeviceManager::AddDevice(nsIPresentationDevice* aDevice)
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{
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NS_ENSURE_ARG(aDevice);
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MOZ_ASSERT(NS_IsMainThread());
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if (NS_WARN_IF(mDevices.Contains(aDevice))) {
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return NS_ERROR_FAILURE;
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}
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mDevices.AppendElement(aDevice);
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NotifyDeviceChange(aDevice, MOZ_UTF16("add"));
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return NS_OK;
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}
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NS_IMETHODIMP
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PresentationDeviceManager::RemoveDevice(nsIPresentationDevice* aDevice)
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{
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NS_ENSURE_ARG(aDevice);
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MOZ_ASSERT(NS_IsMainThread());
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int32_t index = mDevices.IndexOf(aDevice);
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if (NS_WARN_IF(index < 0)) {
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return NS_ERROR_FAILURE;
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}
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mDevices.RemoveElementAt(index);
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NotifyDeviceChange(aDevice, MOZ_UTF16("remove"));
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return NS_OK;
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}
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NS_IMETHODIMP
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PresentationDeviceManager::UpdateDevice(nsIPresentationDevice* aDevice)
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{
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NS_ENSURE_ARG(aDevice);
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MOZ_ASSERT(NS_IsMainThread());
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if (NS_WARN_IF(!mDevices.Contains(aDevice))) {
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return NS_ERROR_FAILURE;
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}
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NotifyDeviceChange(aDevice, MOZ_UTF16("update"));
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return NS_OK;
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}
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NS_IMETHODIMP
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PresentationDeviceManager::OnSessionRequest(nsIPresentationDevice* aDevice,
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const nsAString& aUrl,
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const nsAString& aPresentationId,
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nsIPresentationControlChannel* aControlChannel)
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{
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NS_ENSURE_ARG(aDevice);
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NS_ENSURE_ARG(aControlChannel);
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nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
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NS_ENSURE_TRUE(obs, NS_ERROR_FAILURE);
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RefPtr<PresentationSessionRequest> request =
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new PresentationSessionRequest(aDevice, aUrl, aPresentationId, aControlChannel);
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obs->NotifyObservers(request,
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PRESENTATION_SESSION_REQUEST_TOPIC,
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nullptr);
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return NS_OK;
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}
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// nsIObserver
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NS_IMETHODIMP
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PresentationDeviceManager::Observe(nsISupports *aSubject,
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const char *aTopic,
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const char16_t *aData)
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{
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if (!strcmp(aTopic, "profile-after-change")) {
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Init();
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} else if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
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Shutdown();
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}
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return NS_OK;
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}
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} // namespace dom
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} // namespace mozilla
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