diff -r 000000000000 -r 6474c204b198 dom/media/MediaPermissionGonk.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/media/MediaPermissionGonk.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,591 @@
+/* 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 "MediaManager.h"
+#include "MediaPermissionGonk.h"
+
+#include "nsCOMPtr.h"
+#include "nsCxPusher.h"
+#include "nsIContentPermissionPrompt.h"
+#include "nsIDocument.h"
+#include "nsIDOMNavigatorUserMedia.h"
+#include "nsIStringEnumerator.h"
+#include "nsISupportsArray.h"
+#include "nsJSUtils.h"
+#include "nsPIDOMWindow.h"
+#include "nsTArray.h"
+#include "GetUserMediaRequest.h"
+#include "PCOMContentPermissionRequestChild.h"
+#include "mozilla/dom/PBrowserChild.h"
+#include "mozilla/dom/TabChild.h"
+#include "mozilla/dom/MediaStreamTrackBinding.h"
+#include "nsISupportsPrimitives.h"
+#include "nsServiceManagerUtils.h"
+#include "nsArrayUtils.h"
+#include "nsContentPermissionHelper.h"
+#include "mozilla/dom/PermissionMessageUtils.h"
+
+#define AUDIO_PERMISSION_NAME "audio-capture"
+#define VIDEO_PERMISSION_NAME "video-capture"
+
+using namespace mozilla::dom;
+
+namespace mozilla {
+
+static MediaPermissionManager *gMediaPermMgr = nullptr;
+
+static uint32_t
+ConvertArrayToPermissionRequest(nsIArray* aSrcArray,
+                                nsTArray<PermissionRequest>& aDesArray)
+{
+  uint32_t len = 0;
+  aSrcArray->GetLength(&len);
+  for (uint32_t i = 0; i < len; i++) {
+    nsCOMPtr<nsIContentPermissionType> cpt = do_QueryElementAt(aSrcArray, i);
+    nsAutoCString type;
+    nsAutoCString access;
+    cpt->GetType(type);
+    cpt->GetAccess(access);
+
+    nsCOMPtr<nsIArray> optionArray;
+    cpt->GetOptions(getter_AddRefs(optionArray));
+    uint32_t optionsLength = 0;
+    optionArray->GetLength(&optionsLength);
+    nsTArray<nsString> options;
+    for (uint32_t j = 0; j < optionsLength; ++j) {
+      nsCOMPtr<nsISupportsString> isupportsString = do_QueryElementAt(optionArray, j);
+      if (isupportsString) {
+        nsString option;
+        isupportsString->GetData(option);
+        options.AppendElement(option);
+      }
+    }
+
+    aDesArray.AppendElement(PermissionRequest(type, access, options));
+  }
+  return len;
+}
+
+static void
+CreateDeviceNameList(nsTArray<nsCOMPtr<nsIMediaDevice> > &aDevices,
+                     nsTArray<nsString> &aDeviceNameList)
+{
+  for (uint32_t i = 0; i < aDevices.Length(); ++i) {
+     nsString name;
+     nsresult rv = aDevices[i]->GetName(name);
+     NS_ENSURE_SUCCESS_VOID(rv);
+     aDeviceNameList.AppendElement(name);
+  }
+}
+
+static already_AddRefed<nsIMediaDevice>
+FindDeviceByName(nsTArray<nsCOMPtr<nsIMediaDevice> > &aDevices,
+                 const nsAString &aDeviceName)
+{
+  for (uint32_t i = 0; i < aDevices.Length(); ++i) {
+    nsCOMPtr<nsIMediaDevice> device = aDevices[i];
+    nsString deviceName;
+    device->GetName(deviceName);
+    if (deviceName.Equals(aDeviceName)) {
+      return device.forget();
+    }
+  }
+
+  return nullptr;
+}
+
+// Helper function for notifying permission granted
+static nsresult
+NotifyPermissionAllow(const nsAString &aCallID, nsTArray<nsCOMPtr<nsIMediaDevice> > &aDevices)
+{
+  nsresult rv;
+  nsCOMPtr<nsISupportsArray> array;
+  rv = NS_NewISupportsArray(getter_AddRefs(array));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  for (uint32_t i = 0; i < aDevices.Length(); ++i) {
+    rv = array->AppendElement(aDevices.ElementAt(i));
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  NS_ENSURE_TRUE(obs, NS_ERROR_FAILURE);
+
+  return obs->NotifyObservers(array, "getUserMedia:response:allow",
+                              aCallID.BeginReading());
+}
+
+// Helper function for notifying permision denial or error
+static nsresult
+NotifyPermissionDeny(const nsAString &aCallID, const nsAString &aErrorMsg)
+{
+  nsresult rv;
+  nsCOMPtr<nsISupportsString> supportsString =
+    do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = supportsString->SetData(aErrorMsg);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  NS_ENSURE_TRUE(obs, NS_ERROR_FAILURE);
+
+  return obs->NotifyObservers(supportsString, "getUserMedia:response:deny",
+                              aCallID.BeginReading());
+}
+
+namespace {
+
+/**
+ * MediaPermissionRequest will send a prompt ipdl request to b2g process according
+ * to its owned type.
+ */
+class MediaPermissionRequest : public nsIContentPermissionRequest
+                             , public PCOMContentPermissionRequestChild
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSICONTENTPERMISSIONREQUEST
+
+  MediaPermissionRequest(nsRefPtr<dom::GetUserMediaRequest> &aRequest,
+                         nsTArray<nsCOMPtr<nsIMediaDevice> > &aDevices);
+  virtual ~MediaPermissionRequest() {}
+
+  // It will be called when prompt dismissed.
+  virtual bool Recv__delete__(const bool &allow,
+                              const InfallibleTArray<PermissionChoice>& choices) MOZ_OVERRIDE;
+  virtual void IPDLRelease() MOZ_OVERRIDE { Release(); }
+
+  already_AddRefed<nsPIDOMWindow> GetOwner();
+
+private:
+  nsresult DoAllow(const nsString &audioDevice, const nsString &videoDevice);
+
+  bool mAudio; // Request for audio permission
+  bool mVideo; // Request for video permission
+  nsRefPtr<dom::GetUserMediaRequest> mRequest;
+  nsTArray<nsCOMPtr<nsIMediaDevice> > mAudioDevices; // candidate audio devices
+  nsTArray<nsCOMPtr<nsIMediaDevice> > mVideoDevices; // candidate video devices
+};
+
+// MediaPermissionRequest
+NS_IMPL_ISUPPORTS(MediaPermissionRequest, nsIContentPermissionRequest)
+
+MediaPermissionRequest::MediaPermissionRequest(nsRefPtr<dom::GetUserMediaRequest> &aRequest,
+                                               nsTArray<nsCOMPtr<nsIMediaDevice> > &aDevices)
+  : mRequest(aRequest)
+{
+  dom::MediaStreamConstraints constraints;
+  mRequest->GetConstraints(constraints);
+
+  mAudio = !constraints.mAudio.IsBoolean() || constraints.mAudio.GetAsBoolean();
+  mVideo = !constraints.mVideo.IsBoolean() || constraints.mVideo.GetAsBoolean();
+
+  for (uint32_t i = 0; i < aDevices.Length(); ++i) {
+    nsCOMPtr<nsIMediaDevice> device(aDevices[i]);
+    nsAutoString deviceType;
+    device->GetType(deviceType);
+    if (mAudio && deviceType.EqualsLiteral("audio")) {
+      mAudioDevices.AppendElement(device);
+    }
+    if (mVideo && deviceType.EqualsLiteral("video")) {
+      mVideoDevices.AppendElement(device);
+    }
+  }
+}
+
+// nsIContentPermissionRequest methods
+NS_IMETHODIMP
+MediaPermissionRequest::GetTypes(nsIArray** aTypes)
+{
+  nsCOMPtr<nsIMutableArray> types = do_CreateInstance(NS_ARRAY_CONTRACTID);
+  //XXX append device list
+  if (mAudio) {
+    nsTArray<nsString> audioDeviceNames;
+    CreateDeviceNameList(mAudioDevices, audioDeviceNames);
+    nsCOMPtr<nsISupports> AudioType =
+      new ContentPermissionType(NS_LITERAL_CSTRING(AUDIO_PERMISSION_NAME),
+                                NS_LITERAL_CSTRING("unused"),
+                                audioDeviceNames);
+    types->AppendElement(AudioType, false);
+  }
+  if (mVideo) {
+    nsTArray<nsString> videoDeviceNames;
+    CreateDeviceNameList(mVideoDevices, videoDeviceNames);
+    nsCOMPtr<nsISupports> VideoType =
+      new ContentPermissionType(NS_LITERAL_CSTRING(VIDEO_PERMISSION_NAME),
+                                NS_LITERAL_CSTRING("unused"),
+                                videoDeviceNames);
+    types->AppendElement(VideoType, false);
+  }
+  NS_IF_ADDREF(*aTypes = types);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MediaPermissionRequest::GetPrincipal(nsIPrincipal **aRequestingPrincipal)
+{
+  NS_ENSURE_ARG_POINTER(aRequestingPrincipal);
+
+  nsCOMPtr<nsPIDOMWindow> window = static_cast<nsPIDOMWindow*>
+      (nsGlobalWindow::GetInnerWindowWithId(mRequest->InnerWindowID()));
+  NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
+
+  nsCOMPtr<nsIDocument> doc = window->GetExtantDoc();
+  NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
+
+  NS_ADDREF(*aRequestingPrincipal = doc->NodePrincipal());
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MediaPermissionRequest::GetWindow(nsIDOMWindow** aRequestingWindow)
+{
+  NS_ENSURE_ARG_POINTER(aRequestingWindow);
+  nsCOMPtr<nsPIDOMWindow> window = static_cast<nsPIDOMWindow*>
+      (nsGlobalWindow::GetInnerWindowWithId(mRequest->InnerWindowID()));
+  window.forget(aRequestingWindow);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MediaPermissionRequest::GetElement(nsIDOMElement** aRequestingElement)
+{
+  NS_ENSURE_ARG_POINTER(aRequestingElement);
+  *aRequestingElement = nullptr;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MediaPermissionRequest::Cancel()
+{
+  nsString callID;
+  mRequest->GetCallID(callID);
+  NotifyPermissionDeny(callID, NS_LITERAL_STRING("Permission Denied"));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MediaPermissionRequest::Allow(JS::HandleValue aChoices)
+{
+  // check if JS object
+  if (!aChoices.isObject()) {
+    MOZ_ASSERT(false, "Not a correct format of PermissionChoice");
+    return NS_ERROR_INVALID_ARG;
+  }
+  // iterate through audio-capture and video-capture
+  AutoSafeJSContext cx;
+  JS::Rooted<JSObject*> obj(cx, &aChoices.toObject());
+  JSAutoCompartment ac(cx, obj);
+  JS::Rooted<JS::Value> v(cx);
+
+  // get selected audio device name
+  nsString audioDevice;
+  if (mAudio) {
+    if (!JS_GetProperty(cx, obj, AUDIO_PERMISSION_NAME, &v) || !v.isString()) {
+      return NS_ERROR_FAILURE;
+    }
+    nsDependentJSString deviceName;
+    if (!deviceName.init(cx, v)) {
+      MOZ_ASSERT(false, "Couldn't initialize string from aChoices");
+      return NS_ERROR_FAILURE;
+    }
+    audioDevice = deviceName;
+  }
+
+  // get selected video device name
+  nsString videoDevice;
+  if (mVideo) {
+    if (!JS_GetProperty(cx, obj, VIDEO_PERMISSION_NAME, &v) || !v.isString()) {
+      return NS_ERROR_FAILURE;
+    }
+    nsDependentJSString deviceName;
+    if (!deviceName.init(cx, v)) {
+      MOZ_ASSERT(false, "Couldn't initialize string from aChoices");
+      return NS_ERROR_FAILURE;
+    }
+    videoDevice = deviceName;
+  }
+
+  return DoAllow(audioDevice, videoDevice);
+}
+
+nsresult
+MediaPermissionRequest::DoAllow(const nsString &audioDevice,
+                                const nsString &videoDevice)
+{
+  nsTArray<nsCOMPtr<nsIMediaDevice> > selectedDevices;
+  if (mAudio) {
+    nsCOMPtr<nsIMediaDevice> device =
+      FindDeviceByName(mAudioDevices, audioDevice);
+    if (device) {
+      selectedDevices.AppendElement(device);
+    }
+  }
+
+  if (mVideo) {
+    nsCOMPtr<nsIMediaDevice> device =
+      FindDeviceByName(mVideoDevices, videoDevice);
+    if (device) {
+      selectedDevices.AppendElement(device);
+    }
+  }
+
+  nsString callID;
+  mRequest->GetCallID(callID);
+  return NotifyPermissionAllow(callID, selectedDevices);
+}
+
+already_AddRefed<nsPIDOMWindow>
+MediaPermissionRequest::GetOwner()
+{
+  nsCOMPtr<nsPIDOMWindow> window = static_cast<nsPIDOMWindow*>
+      (nsGlobalWindow::GetInnerWindowWithId(mRequest->InnerWindowID()));
+  return window.forget();
+}
+
+//PCOMContentPermissionRequestChild
+bool
+MediaPermissionRequest::Recv__delete__(const bool& allow,
+                                       const InfallibleTArray<PermissionChoice>& choices)
+{
+  if (allow) {
+    // get selected device name for audio and video
+    nsString audioDevice, videoDevice;
+    for (uint32_t i = 0; i < choices.Length(); ++i) {
+      const nsString &choice = choices[i].choice();
+      if (choices[i].type().EqualsLiteral(AUDIO_PERMISSION_NAME)) {
+        audioDevice = choice;
+      } else if (choices[i].type().EqualsLiteral(VIDEO_PERMISSION_NAME)) {
+        videoDevice = choice;
+      }
+    }
+    (void) DoAllow(audioDevice, videoDevice);
+  } else {
+    (void) Cancel();
+  }
+  return true;
+}
+
+// Success callback for MediaManager::GetUserMediaDevices().
+class MediaDeviceSuccessCallback: public nsIGetUserMediaDevicesSuccessCallback
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIGETUSERMEDIADEVICESSUCCESSCALLBACK
+
+  MediaDeviceSuccessCallback(nsRefPtr<dom::GetUserMediaRequest> &aRequest)
+    : mRequest(aRequest) {}
+  virtual ~MediaDeviceSuccessCallback() {}
+
+private:
+  nsresult DoPrompt(nsRefPtr<MediaPermissionRequest> &req);
+  nsRefPtr<dom::GetUserMediaRequest> mRequest;
+};
+
+NS_IMPL_ISUPPORTS(MediaDeviceSuccessCallback, nsIGetUserMediaDevicesSuccessCallback)
+
+// nsIGetUserMediaDevicesSuccessCallback method
+NS_IMETHODIMP
+MediaDeviceSuccessCallback::OnSuccess(nsIVariant* aDevices)
+{
+  nsIID elementIID;
+  uint16_t elementType;
+  void* rawArray;
+  uint32_t arrayLen;
+
+  nsresult rv;
+  rv = aDevices->GetAsArray(&elementType, &elementIID, &arrayLen, &rawArray);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (elementType != nsIDataType::VTYPE_INTERFACE) {
+    NS_Free(rawArray);
+    return NS_ERROR_FAILURE;
+  }
+
+  // Create array for nsIMediaDevice
+  nsTArray<nsCOMPtr<nsIMediaDevice> > devices;
+
+  nsISupports **supportsArray = reinterpret_cast<nsISupports **>(rawArray);
+  for (uint32_t i = 0; i < arrayLen; ++i) {
+    nsCOMPtr<nsIMediaDevice> device(do_QueryInterface(supportsArray[i]));
+    devices.AppendElement(device);
+    NS_IF_RELEASE(supportsArray[i]); // explicitly decrease reference count for raw pointer
+  }
+  NS_Free(rawArray); // explicitly free for the memory from nsIVariant::GetAsArray
+
+  // Send MediaPermissionRequest
+  nsRefPtr<MediaPermissionRequest> req = new MediaPermissionRequest(mRequest, devices);
+  rv = DoPrompt(req);
+
+  NS_ENSURE_SUCCESS(rv, rv);
+  return NS_OK;
+}
+
+// Trigger permission prompt UI
+nsresult
+MediaDeviceSuccessCallback::DoPrompt(nsRefPtr<MediaPermissionRequest> &req)
+{
+  // for content process
+  if (XRE_GetProcessType() == GeckoProcessType_Content) {
+    MOZ_ASSERT(NS_IsMainThread()); // IPC can only be execute on main thread.
+
+    nsresult rv;
+
+    nsCOMPtr<nsPIDOMWindow> window(req->GetOwner());
+    NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
+
+    dom::TabChild* child = dom::TabChild::GetFrom(window->GetDocShell());
+    NS_ENSURE_TRUE(child, NS_ERROR_FAILURE);
+
+    nsCOMPtr<nsIArray> typeArray;
+    rv = req->GetTypes(getter_AddRefs(typeArray));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsTArray<PermissionRequest> permArray;
+    ConvertArrayToPermissionRequest(typeArray, permArray);
+
+    nsCOMPtr<nsIPrincipal> principal;
+    rv = req->GetPrincipal(getter_AddRefs(principal));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    req->AddRef();
+    child->SendPContentPermissionRequestConstructor(req,
+                                                    permArray,
+                                                    IPC::Principal(principal));
+
+    req->Sendprompt();
+    return NS_OK;
+  }
+
+  // for chrome process
+  nsCOMPtr<nsIContentPermissionPrompt> prompt =
+      do_GetService(NS_CONTENT_PERMISSION_PROMPT_CONTRACTID);
+  if (prompt) {
+    prompt->Prompt(req);
+  }
+  return NS_OK;
+}
+
+// Error callback for MediaManager::GetUserMediaDevices()
+class MediaDeviceErrorCallback: public nsIDOMGetUserMediaErrorCallback
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIDOMGETUSERMEDIAERRORCALLBACK
+
+  MediaDeviceErrorCallback(const nsAString &aCallID)
+    : mCallID(aCallID) {}
+
+  virtual ~MediaDeviceErrorCallback() {}
+
+private:
+  const nsString mCallID;
+};
+
+NS_IMPL_ISUPPORTS(MediaDeviceErrorCallback, nsIDOMGetUserMediaErrorCallback)
+
+// nsIDOMGetUserMediaErrorCallback method
+NS_IMETHODIMP
+MediaDeviceErrorCallback::OnError(const nsAString &aError)
+{
+  return NotifyPermissionDeny(mCallID, aError);
+}
+
+} // namespace anonymous
+
+// MediaPermissionManager
+NS_IMPL_ISUPPORTS(MediaPermissionManager, nsIObserver)
+
+MediaPermissionManager*
+MediaPermissionManager::GetInstance()
+{
+  if (!gMediaPermMgr) {
+    gMediaPermMgr = new MediaPermissionManager();
+  }
+
+  return gMediaPermMgr;
+}
+
+MediaPermissionManager::MediaPermissionManager()
+{
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  if (obs) {
+    obs->AddObserver(this, "getUserMedia:request", false);
+    obs->AddObserver(this, "xpcom-shutdown", false);
+  }
+}
+
+MediaPermissionManager::~MediaPermissionManager()
+{
+  this->Deinit();
+}
+
+nsresult
+MediaPermissionManager::Deinit()
+{
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  if (obs) {
+    obs->RemoveObserver(this, "getUserMedia:request");
+    obs->RemoveObserver(this, "xpcom-shutdown");
+  }
+  return NS_OK;
+}
+
+// nsIObserver method
+NS_IMETHODIMP
+MediaPermissionManager::Observe(nsISupports* aSubject, const char* aTopic,
+  const char16_t* aData)
+{
+  nsresult rv;
+  if (!strcmp(aTopic, "getUserMedia:request")) {
+    nsRefPtr<dom::GetUserMediaRequest> req =
+        static_cast<dom::GetUserMediaRequest*>(aSubject);
+    rv = HandleRequest(req);
+
+    if (NS_FAILED(rv)) {
+      nsString callID;
+      req->GetCallID(callID);
+      NotifyPermissionDeny(callID, NS_LITERAL_STRING("unable to enumerate media device"));
+    }
+  } else if (!strcmp(aTopic, "xpcom-shutdown")) {
+    rv = this->Deinit();
+  } else {
+    // not reachable
+    rv = NS_ERROR_FAILURE;
+  }
+  return rv;
+}
+
+// Handle GetUserMediaRequest, query available media device first.
+nsresult
+MediaPermissionManager::HandleRequest(nsRefPtr<dom::GetUserMediaRequest> &req)
+{
+  nsString callID;
+  req->GetCallID(callID);
+
+  nsCOMPtr<nsPIDOMWindow> innerWindow = static_cast<nsPIDOMWindow*>
+      (nsGlobalWindow::GetInnerWindowWithId(req->InnerWindowID()));
+  if (!innerWindow) {
+    MOZ_ASSERT(false, "No inner window");
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> onSuccess =
+      new MediaDeviceSuccessCallback(req);
+  nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onError =
+      new MediaDeviceErrorCallback(callID);
+
+  dom::MediaStreamConstraints constraints;
+  req->GetConstraints(constraints);
+
+  nsRefPtr<MediaManager> MediaMgr = MediaManager::GetInstance();
+  nsresult rv = MediaMgr->GetUserMediaDevices(innerWindow, constraints, onSuccess, onError);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+} // namespace mozilla