michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "DOMCameraManager.h"
michael@0: #include "nsDebug.h"
michael@0: #include "jsapi.h"
michael@0: #include "Navigator.h"
michael@0: #include "nsPIDOMWindow.h"
michael@0: #include "mozilla/Services.h"
michael@0: #include "nsContentPermissionHelper.h"
michael@0: #include "nsIObserverService.h"
michael@0: #include "nsIPermissionManager.h"
michael@0: #include "DOMCameraControl.h"
michael@0: #include "nsDOMClassInfo.h"
michael@0: #include "CameraCommon.h"
michael@0: #include "mozilla/dom/BindingUtils.h"
michael@0: #include "mozilla/dom/CameraManagerBinding.h"
michael@0: #include "mozilla/dom/PermissionMessageUtils.h"
michael@0: #include "mozilla/dom/TabChild.h"
michael@0: #include "PCOMContentPermissionRequestChild.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(nsDOMCameraManager, mWindow)
michael@0: 
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMCameraManager)
michael@0:   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver)
michael@0:   NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
michael@0:   NS_INTERFACE_MAP_ENTRY(nsIObserver)
michael@0:   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
michael@0: NS_INTERFACE_MAP_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMCameraManager)
michael@0: NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMCameraManager)
michael@0: 
michael@0: /**
michael@0:  * Global camera logging object
michael@0:  *
michael@0:  * Set the NSPR_LOG_MODULES environment variable to enable logging
michael@0:  * in a debug build, e.g. NSPR_LOG_MODULES=Camera:5
michael@0:  */
michael@0: PRLogModuleInfo*
michael@0: GetCameraLog()
michael@0: {
michael@0:   static PRLogModuleInfo *sLog;
michael@0:   if (!sLog) {
michael@0:     sLog = PR_NewLogModule("Camera");
michael@0:   }
michael@0:   return sLog;
michael@0: }
michael@0: 
michael@0: WindowTable* nsDOMCameraManager::sActiveWindows = nullptr;
michael@0: 
michael@0: nsDOMCameraManager::nsDOMCameraManager(nsPIDOMWindow* aWindow)
michael@0:   : mWindowId(aWindow->WindowID())
michael@0:   , mPermission(nsIPermissionManager::DENY_ACTION)
michael@0:   , mWindow(aWindow)
michael@0: {
michael@0:   /* member initializers and constructor code */
michael@0:   DOM_CAMERA_LOGT("%s:%d : this=%p, windowId=%llx\n", __func__, __LINE__, this, mWindowId);
michael@0:   MOZ_COUNT_CTOR(nsDOMCameraManager);
michael@0:   SetIsDOMBinding();
michael@0: }
michael@0: 
michael@0: nsDOMCameraManager::~nsDOMCameraManager()
michael@0: {
michael@0:   /* destructor code */
michael@0:   MOZ_COUNT_DTOR(nsDOMCameraManager);
michael@0:   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: void
michael@0: nsDOMCameraManager::GetListOfCameras(nsTArray<nsString>& aList, ErrorResult& aRv)
michael@0: {
michael@0:   aRv = ICameraControl::GetListOfCameras(aList);
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: bool
michael@0: nsDOMCameraManager::HasSupport(JSContext* aCx, JSObject* aGlobal)
michael@0: {
michael@0:   return Navigator::HasCameraSupport(aCx, aGlobal);
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: bool
michael@0: nsDOMCameraManager::CheckPermission(nsPIDOMWindow* aWindow)
michael@0: {
michael@0:   nsCOMPtr<nsIPermissionManager> permMgr =
michael@0:     do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
michael@0:   NS_ENSURE_TRUE(permMgr, false);
michael@0: 
michael@0:   uint32_t permission = nsIPermissionManager::DENY_ACTION;
michael@0:   permMgr->TestPermissionFromWindow(aWindow, "camera", &permission);
michael@0:   if (permission != nsIPermissionManager::ALLOW_ACTION &&
michael@0:       permission != nsIPermissionManager::PROMPT_ACTION) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: already_AddRefed<nsDOMCameraManager>
michael@0: nsDOMCameraManager::CreateInstance(nsPIDOMWindow* aWindow)
michael@0: {
michael@0:   // Initialize the shared active window tracker
michael@0:   if (!sActiveWindows) {
michael@0:     sActiveWindows = new WindowTable();
michael@0:   }
michael@0: 
michael@0:   nsRefPtr<nsDOMCameraManager> cameraManager =
michael@0:     new nsDOMCameraManager(aWindow);
michael@0: 
michael@0:   nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
michael@0:   obs->AddObserver(cameraManager, "xpcom-shutdown", true);
michael@0: 
michael@0:   return cameraManager.forget();
michael@0: }
michael@0: 
michael@0: class CameraPermissionRequest : public nsIContentPermissionRequest
michael@0:                               , public PCOMContentPermissionRequestChild
michael@0:                               , public nsIRunnable
michael@0: {
michael@0: public:
michael@0:   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
michael@0:   NS_DECL_NSICONTENTPERMISSIONREQUEST
michael@0:   NS_DECL_NSIRUNNABLE
michael@0:   NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(CameraPermissionRequest,
michael@0:                                            nsIContentPermissionRequest)
michael@0: 
michael@0:   CameraPermissionRequest(nsIPrincipal* aPrincipal,
michael@0:                           nsPIDOMWindow* aWindow,
michael@0:                           nsRefPtr<nsDOMCameraManager> aManager,
michael@0:                           uint32_t aCameraId,
michael@0:                           const CameraConfiguration& aInitialConfig,
michael@0:                           nsRefPtr<GetCameraCallback> aOnSuccess,
michael@0:                           nsRefPtr<CameraErrorCallback> aOnError)
michael@0:     : mPrincipal(aPrincipal)
michael@0:     , mWindow(aWindow)
michael@0:     , mCameraManager(aManager)
michael@0:     , mCameraId(aCameraId)
michael@0:     , mInitialConfig(aInitialConfig)
michael@0:     , mOnSuccess(aOnSuccess)
michael@0:     , mOnError(aOnError)
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   virtual ~CameraPermissionRequest()
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   bool Recv__delete__(const bool& aAllow,
michael@0:                       const InfallibleTArray<PermissionChoice>& choices);
michael@0: 
michael@0:   void IPDLRelease()
michael@0:   {
michael@0:     Release();
michael@0:   }
michael@0: 
michael@0: protected:
michael@0:   nsresult DispatchCallback(uint32_t aPermission);
michael@0:   void CallAllow();
michael@0:   void CallCancel();
michael@0:   nsCOMPtr<nsIPrincipal> mPrincipal;
michael@0:   nsCOMPtr<nsPIDOMWindow> mWindow;
michael@0:   nsRefPtr<nsDOMCameraManager> mCameraManager;
michael@0:   uint32_t mCameraId;
michael@0:   CameraConfiguration mInitialConfig;
michael@0:   nsRefPtr<GetCameraCallback> mOnSuccess;
michael@0:   nsRefPtr<CameraErrorCallback> mOnError;
michael@0: };
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION(CameraPermissionRequest, mWindow, mOnSuccess, mOnError)
michael@0: 
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CameraPermissionRequest)
michael@0:   NS_INTERFACE_MAP_ENTRY(nsIContentPermissionRequest)
michael@0:   NS_INTERFACE_MAP_ENTRY(nsIRunnable)
michael@0:   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIContentPermissionRequest)
michael@0: NS_INTERFACE_MAP_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTING_ADDREF(CameraPermissionRequest)
michael@0: NS_IMPL_CYCLE_COLLECTING_RELEASE(CameraPermissionRequest)
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: CameraPermissionRequest::Run()
michael@0: {
michael@0:   if (XRE_GetProcessType() == GeckoProcessType_Content) {
michael@0:     TabChild* child = TabChild::GetFrom(mWindow->GetDocShell());
michael@0:     if (!child) {
michael@0:       return NS_ERROR_NOT_AVAILABLE;
michael@0:     }
michael@0: 
michael@0:     // Retain a reference so the object isn't deleted without IPDL's knowledge.
michael@0:     // Corresponding release occurs in DeallocPContentPermissionRequest.
michael@0:     AddRef();
michael@0: 
michael@0:     nsTArray<PermissionRequest> permArray;
michael@0:     nsTArray<nsString> emptyOptions;
michael@0:     permArray.AppendElement(PermissionRequest(
michael@0:                             NS_LITERAL_CSTRING("camera"),
michael@0:                             NS_LITERAL_CSTRING("unused"),
michael@0:                             emptyOptions));
michael@0:     child->SendPContentPermissionRequestConstructor(this, permArray,
michael@0:                                                     IPC::Principal(mPrincipal));
michael@0: 
michael@0:     Sendprompt();
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIContentPermissionPrompt> prompt =
michael@0:     do_GetService(NS_CONTENT_PERMISSION_PROMPT_CONTRACTID);
michael@0:   if (prompt) {
michael@0:     prompt->Prompt(this);
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: bool
michael@0: CameraPermissionRequest::Recv__delete__(const bool& aAllow,
michael@0:                                         const InfallibleTArray<PermissionChoice>& choices)
michael@0: {
michael@0:   if (aAllow) {
michael@0:     Allow(JS::UndefinedHandleValue);
michael@0:   } else {
michael@0:     Cancel();
michael@0:   }
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: CameraPermissionRequest::GetPrincipal(nsIPrincipal** aRequestingPrincipal)
michael@0: {
michael@0:   NS_ADDREF(*aRequestingPrincipal = mPrincipal);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: CameraPermissionRequest::GetWindow(nsIDOMWindow** aRequestingWindow)
michael@0: {
michael@0:   NS_ADDREF(*aRequestingWindow = mWindow);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: CameraPermissionRequest::GetElement(nsIDOMElement** aElement)
michael@0: {
michael@0:   *aElement = nullptr;
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: CameraPermissionRequest::Cancel()
michael@0: {
michael@0:   return DispatchCallback(nsIPermissionManager::DENY_ACTION);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: CameraPermissionRequest::Allow(JS::HandleValue aChoices)
michael@0: {
michael@0:   MOZ_ASSERT(aChoices.isUndefined());
michael@0:   return DispatchCallback(nsIPermissionManager::ALLOW_ACTION);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CameraPermissionRequest::DispatchCallback(uint32_t aPermission)
michael@0: {
michael@0:   nsCOMPtr<nsIRunnable> callbackRunnable;
michael@0:   if (aPermission == nsIPermissionManager::ALLOW_ACTION) {
michael@0:     callbackRunnable = NS_NewRunnableMethod(this, &CameraPermissionRequest::CallAllow);
michael@0:   } else {
michael@0:     callbackRunnable = NS_NewRunnableMethod(this, &CameraPermissionRequest::CallCancel);
michael@0:   }
michael@0:   return NS_DispatchToMainThread(callbackRunnable);
michael@0: }
michael@0: 
michael@0: void
michael@0: CameraPermissionRequest::CallAllow()
michael@0: {
michael@0:   mCameraManager->PermissionAllowed(mCameraId, mInitialConfig, mOnSuccess, mOnError);
michael@0: }
michael@0: 
michael@0: void
michael@0: CameraPermissionRequest::CallCancel()
michael@0: {
michael@0:   mCameraManager->PermissionCancelled(mCameraId, mInitialConfig, mOnSuccess, mOnError);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: CameraPermissionRequest::GetTypes(nsIArray** aTypes)
michael@0: {
michael@0:   nsTArray<nsString> emptyOptions;
michael@0:   return CreatePermissionArray(NS_LITERAL_CSTRING("camera"),
michael@0:                                NS_LITERAL_CSTRING("unused"),
michael@0:                                emptyOptions,
michael@0:                                aTypes);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsDOMCameraManager::GetCamera(const nsAString& aCamera,
michael@0:                               const CameraConfiguration& aInitialConfig,
michael@0:                               GetCameraCallback& aOnSuccess,
michael@0:                               const OptionalNonNullCameraErrorCallback& aOnError,
michael@0:                               ErrorResult& aRv)
michael@0: {
michael@0:   DOM_CAMERA_LOGT("%s:%d\n", __func__, __LINE__);
michael@0: 
michael@0:   uint32_t cameraId = 0;  // back (or forward-facing) camera by default
michael@0:   if (aCamera.EqualsLiteral("front")) {
michael@0:     cameraId = 1;
michael@0:   }
michael@0: 
michael@0:   nsRefPtr<CameraErrorCallback> errorCallback = nullptr;
michael@0:   if (aOnError.WasPassed()) {
michael@0:     errorCallback = &aOnError.Value();
michael@0:   }
michael@0: 
michael@0:   if (mPermission == nsIPermissionManager::ALLOW_ACTION) {
michael@0:     PermissionAllowed(cameraId, aInitialConfig, &aOnSuccess, errorCallback);
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(mWindow);
michael@0:   if (!sop) {
michael@0:     aRv.Throw(NS_ERROR_UNEXPECTED);
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIPrincipal> principal = sop->GetPrincipal();
michael@0: 
michael@0:   nsCOMPtr<nsIRunnable> permissionRequest =
michael@0:     new CameraPermissionRequest(principal, mWindow, this, cameraId, aInitialConfig,
michael@0:                                 &aOnSuccess, errorCallback);
michael@0: 
michael@0:   NS_DispatchToMainThread(permissionRequest);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsDOMCameraManager::PermissionAllowed(uint32_t aCameraId,
michael@0:                                       const CameraConfiguration& aInitialConfig,
michael@0:                                       GetCameraCallback* aOnSuccess,
michael@0:                                       CameraErrorCallback* aOnError)
michael@0: {
michael@0:   mPermission = nsIPermissionManager::ALLOW_ACTION;
michael@0: 
michael@0:   // Creating this object will trigger the aOnSuccess callback
michael@0:   //  (or the aOnError one, if it fails).
michael@0:   nsRefPtr<nsDOMCameraControl> cameraControl =
michael@0:     new nsDOMCameraControl(aCameraId, aInitialConfig, aOnSuccess, aOnError, mWindow);
michael@0: 
michael@0:   Register(cameraControl);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsDOMCameraManager::PermissionCancelled(uint32_t aCameraId,
michael@0:                                         const CameraConfiguration& aInitialConfig,
michael@0:                                         GetCameraCallback* aOnSuccess,
michael@0:                                         CameraErrorCallback* aOnError)
michael@0: {
michael@0:   mPermission = nsIPermissionManager::DENY_ACTION;
michael@0: 
michael@0:   if (aOnError) {
michael@0:     ErrorResult ignored;
michael@0:     aOnError->Call(NS_LITERAL_STRING("Permission denied."), ignored);
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: nsDOMCameraManager::Register(nsDOMCameraControl* aDOMCameraControl)
michael@0: {
michael@0:   DOM_CAMERA_LOGI(">>> Register( aDOMCameraControl = %p ) mWindowId = 0x%llx\n", aDOMCameraControl, mWindowId);
michael@0:   MOZ_ASSERT(NS_IsMainThread());
michael@0: 
michael@0:   // Put the camera control into the hash table
michael@0:   CameraControls* controls = sActiveWindows->Get(mWindowId);
michael@0:   if (!controls) {
michael@0:     controls = new CameraControls;
michael@0:     sActiveWindows->Put(mWindowId, controls);
michael@0:   }
michael@0:   controls->AppendElement(aDOMCameraControl);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsDOMCameraManager::Shutdown(uint64_t aWindowId)
michael@0: {
michael@0:   DOM_CAMERA_LOGI(">>> Shutdown( aWindowId = 0x%llx )\n", aWindowId);
michael@0:   MOZ_ASSERT(NS_IsMainThread());
michael@0: 
michael@0:   CameraControls* controls = sActiveWindows->Get(aWindowId);
michael@0:   if (!controls) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   uint32_t length = controls->Length();
michael@0:   for (uint32_t i = 0; i < length; i++) {
michael@0:     nsRefPtr<nsDOMCameraControl> cameraControl = controls->ElementAt(i);
michael@0:     cameraControl->Shutdown();
michael@0:   }
michael@0:   controls->Clear();
michael@0: 
michael@0:   sActiveWindows->Remove(aWindowId);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsDOMCameraManager::XpComShutdown()
michael@0: {
michael@0:   DOM_CAMERA_LOGI(">>> XPCOM Shutdown\n");
michael@0:   MOZ_ASSERT(NS_IsMainThread());
michael@0: 
michael@0:   nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
michael@0:   obs->RemoveObserver(this, "xpcom-shutdown");
michael@0: 
michael@0:   delete sActiveWindows;
michael@0:   sActiveWindows = nullptr;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsDOMCameraManager::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
michael@0: {
michael@0:   if (strcmp(aTopic, "xpcom-shutdown") == 0) {
michael@0:     XpComShutdown();
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: void
michael@0: nsDOMCameraManager::OnNavigation(uint64_t aWindowId)
michael@0: {
michael@0:   DOM_CAMERA_LOGI(">>> OnNavigation event\n");
michael@0:   Shutdown(aWindowId);
michael@0: }
michael@0: 
michael@0: bool
michael@0: nsDOMCameraManager::IsWindowStillActive(uint64_t aWindowId)
michael@0: {
michael@0:   MOZ_ASSERT(NS_IsMainThread());
michael@0: 
michael@0:   if (!sActiveWindows) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   return !!sActiveWindows->Get(aWindowId);
michael@0: }
michael@0: 
michael@0: JSObject*
michael@0: nsDOMCameraManager::WrapObject(JSContext* aCx)
michael@0: {
michael@0:   return CameraManagerBinding::Wrap(aCx, this);
michael@0: }