import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/presentation/PresentationDeviceManager.cpp

@@ -0,0 +1,336 @@
+/* -*- 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 "nsIMutableArray.h"
+#include "nsIObserverService.h"
+#include "nsXULAppAPI.h"
+#include "PresentationSessionRequest.h"
+#include "PresentationTerminateRequest.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_ISUPPORTS(PresentationDeviceManager,
+                  nsIPresentationDeviceManager,
+                  nsIPresentationDeviceListener,
+                  nsIObserver,
+                  nsISupportsWeakReference)
+
+PresentationDeviceManager::PresentationDeviceManager()
+{
+}
+
+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(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], false);
+      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], false);
+        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