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-rw-r--r--dom/presentation/PresentationDeviceManager.cpp307
1 files changed, 307 insertions, 0 deletions
diff --git a/dom/presentation/PresentationDeviceManager.cpp b/dom/presentation/PresentationDeviceManager.cpp
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+++ b/dom/presentation/PresentationDeviceManager.cpp
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+/* -*- 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 "PresentationDeviceManager.h"
+
+#include "mozilla/Services.h"
+#include "MainThreadUtils.h"
+#include "nsArrayUtils.h"
+#include "nsCategoryCache.h"
+#include "nsCOMPtr.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIMutableArray.h"
+#include "nsIObserverService.h"
+#include "nsISupportsPrimitives.h"
+#include "nsThreadUtils.h"
+#include "nsXULAppAPI.h"
+#include "PresentationSessionRequest.h"
+#include "PresentationTerminateRequest.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_ISUPPORTS(PresentationDeviceManager, nsIPresentationDeviceManager,
+ nsIPresentationDeviceListener, nsIObserver,
+ nsISupportsWeakReference)
+
+PresentationDeviceManager::PresentationDeviceManager() = default;
+
+PresentationDeviceManager::~PresentationDeviceManager() {
+ UnloadDeviceProviders();
+ mDevices.Clear();
+}
+
+void PresentationDeviceManager::Init() {
+ nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
+ if (obs) {
+ obs->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
+ }
+
+ LoadDeviceProviders();
+}
+
+void PresentationDeviceManager::Shutdown() {
+ nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
+ if (obs) {
+ obs->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
+ }
+
+ UnloadDeviceProviders();
+}
+
+void PresentationDeviceManager::LoadDeviceProviders() {
+ MOZ_ASSERT(mProviders.IsEmpty());
+
+ nsCategoryCache<nsIPresentationDeviceProvider> providerCache(
+ PRESENTATION_DEVICE_PROVIDER_CATEGORY);
+ providerCache.GetEntries(mProviders);
+
+ for (uint32_t i = 0; i < mProviders.Length(); ++i) {
+ mProviders[i]->SetListener(this);
+ }
+}
+
+void PresentationDeviceManager::UnloadDeviceProviders() {
+ for (uint32_t i = 0; i < mProviders.Length(); ++i) {
+ mProviders[i]->SetListener(nullptr);
+ }
+
+ mProviders.Clear();
+}
+
+void PresentationDeviceManager::NotifyDeviceChange(
+ nsIPresentationDevice* aDevice, const char16_t* aType) {
+ nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+ if (obs) {
+ obs->NotifyObservers(aDevice, PRESENTATION_DEVICE_CHANGE_TOPIC, aType);
+ }
+}
+
+// nsIPresentationDeviceManager
+NS_IMETHODIMP
+PresentationDeviceManager::ForceDiscovery() {
+ MOZ_ASSERT(NS_IsMainThread());
+
+ for (uint32_t i = 0; i < mProviders.Length(); ++i) {
+ mProviders[i]->ForceDiscovery();
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+PresentationDeviceManager::AddDeviceProvider(
+ nsIPresentationDeviceProvider* aProvider) {
+ NS_ENSURE_ARG(aProvider);
+ MOZ_ASSERT(NS_IsMainThread());
+
+ if (NS_WARN_IF(mProviders.Contains(aProvider))) {
+ return NS_OK;
+ }
+
+ mProviders.AppendElement(aProvider);
+ aProvider->SetListener(this);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+PresentationDeviceManager::RemoveDeviceProvider(
+ nsIPresentationDeviceProvider* aProvider) {
+ NS_ENSURE_ARG(aProvider);
+ MOZ_ASSERT(NS_IsMainThread());
+
+ if (NS_WARN_IF(!mProviders.RemoveElement(aProvider))) {
+ return NS_ERROR_FAILURE;
+ }
+
+ aProvider->SetListener(nullptr);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+PresentationDeviceManager::GetDeviceAvailable(bool* aRetVal) {
+ NS_ENSURE_ARG_POINTER(aRetVal);
+ MOZ_ASSERT(NS_IsMainThread());
+
+ *aRetVal = !mDevices.IsEmpty();
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+PresentationDeviceManager::GetAvailableDevices(nsIArray* aPresentationUrls,
+ nsIArray** aRetVal) {
+ NS_ENSURE_ARG_POINTER(aRetVal);
+ MOZ_ASSERT(NS_IsMainThread());
+
+ // Bug 1194049: some providers may discontinue discovery after timeout.
+ // Call |ForceDiscovery()| here to make sure device lists are updated.
+ NS_DispatchToMainThread(
+ NewRunnableMethod("dom::PresentationDeviceManager::ForceDiscovery", this,
+ &PresentationDeviceManager::ForceDiscovery));
+
+ nsTArray<nsString> presentationUrls;
+ if (aPresentationUrls) {
+ uint32_t length;
+ nsresult rv = aPresentationUrls->GetLength(&length);
+ if (NS_SUCCEEDED(rv)) {
+ for (uint32_t i = 0; i < length; ++i) {
+ nsCOMPtr<nsISupportsString> isupportStr =
+ do_QueryElementAt(aPresentationUrls, i);
+
+ nsAutoString presentationUrl;
+ rv = isupportStr->GetData(presentationUrl);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ continue;
+ }
+
+ presentationUrls.AppendElement(presentationUrl);
+ }
+ }
+ }
+
+ nsCOMPtr<nsIMutableArray> devices = do_CreateInstance(NS_ARRAY_CONTRACTID);
+ for (uint32_t i = 0; i < mDevices.Length(); ++i) {
+ if (presentationUrls.IsEmpty()) {
+ devices->AppendElement(mDevices[i]);
+ continue;
+ }
+
+ for (uint32_t j = 0; j < presentationUrls.Length(); ++j) {
+ bool isSupported;
+ if (NS_SUCCEEDED(mDevices[i]->IsRequestedUrlSupported(presentationUrls[j],
+ &isSupported)) &&
+ isSupported) {
+ devices->AppendElement(mDevices[i]);
+ break;
+ }
+ }
+ }
+
+ devices.forget(aRetVal);
+
+ return NS_OK;
+}
+
+// nsIPresentationDeviceListener
+NS_IMETHODIMP
+PresentationDeviceManager::AddDevice(nsIPresentationDevice* aDevice) {
+ NS_ENSURE_ARG(aDevice);
+ MOZ_ASSERT(NS_IsMainThread());
+
+ if (NS_WARN_IF(mDevices.Contains(aDevice))) {
+ return NS_ERROR_FAILURE;
+ }
+
+ mDevices.AppendElement(aDevice);
+
+ NotifyDeviceChange(aDevice, u"add");
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+PresentationDeviceManager::RemoveDevice(nsIPresentationDevice* aDevice) {
+ NS_ENSURE_ARG(aDevice);
+ MOZ_ASSERT(NS_IsMainThread());
+
+ int32_t index = mDevices.IndexOf(aDevice);
+ if (NS_WARN_IF(index < 0)) {
+ return NS_ERROR_FAILURE;
+ }
+
+ mDevices.RemoveElementAt(index);
+
+ NotifyDeviceChange(aDevice, u"remove");
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+PresentationDeviceManager::UpdateDevice(nsIPresentationDevice* aDevice) {
+ NS_ENSURE_ARG(aDevice);
+ MOZ_ASSERT(NS_IsMainThread());
+
+ if (NS_WARN_IF(!mDevices.Contains(aDevice))) {
+ return NS_ERROR_FAILURE;
+ }
+
+ NotifyDeviceChange(aDevice, u"update");
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+PresentationDeviceManager::OnSessionRequest(
+ nsIPresentationDevice* aDevice, const nsAString& aUrl,
+ const nsAString& aPresentationId,
+ nsIPresentationControlChannel* aControlChannel) {
+ NS_ENSURE_ARG(aDevice);
+ NS_ENSURE_ARG(aControlChannel);
+
+ nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+ NS_ENSURE_TRUE(obs, NS_ERROR_FAILURE);
+
+ RefPtr<PresentationSessionRequest> request = new PresentationSessionRequest(
+ aDevice, aUrl, aPresentationId, aControlChannel);
+ obs->NotifyObservers(request, PRESENTATION_SESSION_REQUEST_TOPIC, nullptr);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+PresentationDeviceManager::OnTerminateRequest(
+ nsIPresentationDevice* aDevice, const nsAString& aPresentationId,
+ nsIPresentationControlChannel* aControlChannel, bool aIsFromReceiver) {
+ NS_ENSURE_ARG(aDevice);
+ NS_ENSURE_ARG(aControlChannel);
+
+ nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+ NS_ENSURE_TRUE(obs, NS_ERROR_FAILURE);
+
+ RefPtr<PresentationTerminateRequest> request =
+ new PresentationTerminateRequest(aDevice, aPresentationId,
+ aControlChannel, aIsFromReceiver);
+ obs->NotifyObservers(request, PRESENTATION_TERMINATE_REQUEST_TOPIC, nullptr);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+PresentationDeviceManager::OnReconnectRequest(
+ nsIPresentationDevice* aDevice, const nsAString& aUrl,
+ const nsAString& aPresentationId,
+ nsIPresentationControlChannel* aControlChannel) {
+ NS_ENSURE_ARG(aDevice);
+ NS_ENSURE_ARG(aControlChannel);
+
+ nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+ NS_ENSURE_TRUE(obs, NS_ERROR_FAILURE);
+
+ RefPtr<PresentationSessionRequest> request = new PresentationSessionRequest(
+ aDevice, aUrl, aPresentationId, aControlChannel);
+ obs->NotifyObservers(request, PRESENTATION_RECONNECT_REQUEST_TOPIC, nullptr);
+
+ return NS_OK;
+}
+
+// nsIObserver
+NS_IMETHODIMP
+PresentationDeviceManager::Observe(nsISupports* aSubject, const char* aTopic,
+ const char16_t* aData) {
+ if (!strcmp(aTopic, "profile-after-change")) {
+ Init();
+ } else if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
+ Shutdown();
+ }
+
+ return NS_OK;
+}
+
+} // namespace dom
+} // namespace mozilla
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