The Tor Browser: dom/camera/DOMCameraCapabilities.cpp@97036ab72558 (annotated)

dom/camera/DOMCameraCapabilities.cpp@97036ab72558 (annotated)

dom/camera/DOMCameraCapabilities.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim:set ts=2 sw=2 sts=2 et cindent: */
 /* 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 "DOMCameraCapabilities.h"
 #include "nsPIDOMWindow.h"
 #include "nsContentUtils.h"
 #include "mozilla/dom/CameraManagerBinding.h"
 #include "mozilla/dom/CameraCapabilitiesBinding.h"
 #include "Navigator.h"
 #include "CameraCommon.h"
 #include "ICameraControl.h"
 #include "CameraRecorderProfiles.h"
 namespace mozilla {
 namespace dom {
 NS_IMPL_CYCLE_COLLECTION_CLASS(CameraCapabilities)
 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(CameraCapabilities)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindow)
   tmp->mRecorderProfiles = JS::UndefinedValue();
   NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(CameraCapabilities)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindow)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(CameraCapabilities)
   NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mRecorderProfiles)
   NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
 NS_IMPL_CYCLE_COLLECTION_TRACE_END
 NS_IMPL_CYCLE_COLLECTING_ADDREF(CameraCapabilities)
 NS_IMPL_CYCLE_COLLECTING_RELEASE(CameraCapabilities)
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CameraCapabilities)
   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
   NS_INTERFACE_MAP_ENTRY(nsISupports)
 NS_INTERFACE_MAP_END
 /* static */
 bool
 CameraCapabilities::HasSupport(JSContext* aCx, JSObject* aGlobal)
 {
   return Navigator::HasCameraSupport(aCx, aGlobal);
 }
 CameraCapabilities::CameraCapabilities(nsPIDOMWindow* aWindow)
   : mRecorderProfiles(JS::UndefinedValue())
   , mWindow(aWindow)
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
   MOZ_COUNT_CTOR(CameraCapabilities);
   mozilla::HoldJSObjects(this);
   SetIsDOMBinding();
 }
 CameraCapabilities::~CameraCapabilities()
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
   mRecorderProfiles = JS::UndefinedValue();
   mozilla::DropJSObjects(this);
   MOZ_COUNT_DTOR(CameraCapabilities);
 }
 JSObject*
 CameraCapabilities::WrapObject(JSContext* aCx)
 {
   return CameraCapabilitiesBinding::Wrap(aCx, this);
 }
 #define LOG_IF_ERROR(rv, param)                               \
   do {                                                        \
     if (NS_FAILED(rv)) {                                      \
       DOM_CAMERA_LOGW("Error %x trying to get " #param "\n",  \
         (rv));                                                \
     }                                                         \
   } while(0)
 nsresult
 CameraCapabilities::TranslateToDictionary(ICameraControl* aCameraControl,
                                           uint32_t aKey, nsTArray<CameraSize>& aSizes)
 {
   nsresult rv;
   nsTArray<ICameraControl::Size> sizes;
   rv = aCameraControl->Get(aKey, sizes);
   if (NS_FAILED(rv)) {
     return rv;
   }
   aSizes.Clear();
   aSizes.SetCapacity(sizes.Length());
   for (uint32_t i = 0; i < sizes.Length(); ++i) {
     CameraSize* s = aSizes.AppendElement();
     s->mWidth = sizes[i].width;
     s->mHeight = sizes[i].height;
   }
   return NS_OK;
 }
 nsresult
 CameraCapabilities::Populate(ICameraControl* aCameraControl)
 {
   NS_ENSURE_TRUE(aCameraControl, NS_ERROR_INVALID_ARG);
   nsresult rv;
   rv = TranslateToDictionary(aCameraControl, CAMERA_PARAM_SUPPORTED_PREVIEWSIZES, mPreviewSizes);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_PREVIEWSIZES);
   rv = TranslateToDictionary(aCameraControl, CAMERA_PARAM_SUPPORTED_PICTURESIZES, mPictureSizes);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_PICTURESIZES);
   rv = TranslateToDictionary(aCameraControl, CAMERA_PARAM_SUPPORTED_JPEG_THUMBNAIL_SIZES, mThumbnailSizes);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_JPEG_THUMBNAIL_SIZES);
   rv = TranslateToDictionary(aCameraControl, CAMERA_PARAM_SUPPORTED_VIDEOSIZES, mVideoSizes);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_VIDEOSIZES);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_PICTUREFORMATS, mFileFormats);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_PICTUREFORMATS);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_WHITEBALANCES, mWhiteBalanceModes);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_WHITEBALANCES);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_SCENEMODES, mSceneModes);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_SCENEMODES);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_EFFECTS, mEffects);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_EFFECTS);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_FLASHMODES, mFlashModes);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_FLASHMODES);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_FOCUSMODES, mFocusModes);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_FOCUSMODES);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_ISOMODES, mIsoModes);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_ISOMODES);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_ZOOMRATIOS, mZoomRatios);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_ZOOMRATIOS);
   int32_t areas;
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_MAXFOCUSAREAS, areas);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_MAXFOCUSAREAS);
   mMaxFocusAreas = areas < 0 ? 0 : areas;
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_MAXMETERINGAREAS, areas);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_MAXMETERINGAREAS);
   mMaxMeteringAreas = areas < 0 ? 0 : areas;
   int32_t faces;
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_MAXDETECTEDFACES, faces);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_MAXDETECTEDFACES);
   mMaxDetectedFaces = faces < 0 ? 0 : faces;
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_MINEXPOSURECOMPENSATION, mMinExposureCompensation);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_MINEXPOSURECOMPENSATION);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_MAXEXPOSURECOMPENSATION, mMaxExposureCompensation);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_MAXEXPOSURECOMPENSATION);
   rv = aCameraControl->Get(CAMERA_PARAM_SUPPORTED_EXPOSURECOMPENSATIONSTEP, mExposureCompensationStep);
   LOG_IF_ERROR(rv, CAMERA_PARAM_SUPPORTED_EXPOSURECOMPENSATIONSTEP);
   mRecorderProfileManager = aCameraControl->GetRecorderProfileManager();
   if (!mRecorderProfileManager) {
     DOM_CAMERA_LOGW("Unable to get recorder profile manager\n");
   } else {
     AutoJSContext js;
     JS::Rooted<JSObject*> o(js);
     nsresult rv = mRecorderProfileManager->GetJsObject(js, o.address());
     if (NS_FAILED(rv)) {
       DOM_CAMERA_LOGE("Failed to JS-objectify profile manager (%d)\n", rv);
       return rv;
     }
     mRecorderProfiles = JS::ObjectValue(*o);
   }
   // For now, always return success, since the presence or absence of capabilities
   // indicates whether or not they are supported.
   return NS_OK;
 }
 void
 CameraCapabilities::GetPreviewSizes(nsTArray<dom::CameraSize>& retval) const
 {
   retval = mPreviewSizes;
 }
 void
 CameraCapabilities::GetPictureSizes(nsTArray<dom::CameraSize>& retval) const
 {
   retval = mPictureSizes;
 }
 void
 CameraCapabilities::GetThumbnailSizes(nsTArray<dom::CameraSize>& retval) const
 {
   retval = mThumbnailSizes;
 }
 void
 CameraCapabilities::GetVideoSizes(nsTArray<dom::CameraSize>& retval) const
 {
   retval = mVideoSizes;
 }
 void
 CameraCapabilities::GetFileFormats(nsTArray<nsString>& retval) const
 {
   retval = mFileFormats;
 }
 void
 CameraCapabilities::GetWhiteBalanceModes(nsTArray<nsString>& retval) const
 {
   retval = mWhiteBalanceModes;
 }
 void
 CameraCapabilities::GetSceneModes(nsTArray<nsString>& retval) const
 {
   retval = mSceneModes;
 }
 void
 CameraCapabilities::GetEffects(nsTArray<nsString>& retval) const
 {
   retval = mEffects;
 }
 void
 CameraCapabilities::GetFlashModes(nsTArray<nsString>& retval) const
 {
   retval = mFlashModes;
 }
 void
 CameraCapabilities::GetFocusModes(nsTArray<nsString>& retval) const
 {
   retval = mFocusModes;
 }
 void
 CameraCapabilities::GetZoomRatios(nsTArray<double>& retval) const
 {
   retval = mZoomRatios;
 }
 uint32_t
 CameraCapabilities::MaxFocusAreas() const
 {
   return mMaxFocusAreas;
 }
 uint32_t
 CameraCapabilities::MaxMeteringAreas() const
 {
   return mMaxMeteringAreas;
 }
 uint32_t
 CameraCapabilities::MaxDetectedFaces() const
 {
   return mMaxDetectedFaces;
 }
 double
 CameraCapabilities::MinExposureCompensation() const
 {
   return mMinExposureCompensation;
 }
 double
 CameraCapabilities::MaxExposureCompensation() const
 {
   return mMaxExposureCompensation;
 }
 double
 CameraCapabilities::ExposureCompensationStep() const
 {
   return mExposureCompensationStep;
 }
 void
 CameraCapabilities::GetRecorderProfiles(JSContext* aCx,
                                         JS::MutableHandle<JS::Value> aRetval) const
 {
   JS::ExposeValueToActiveJS(mRecorderProfiles);
   aRetval.set(mRecorderProfiles);
 }
 void
 CameraCapabilities::GetIsoModes(nsTArray<nsString>& retval) const
 {
   retval = mIsoModes;
 }
 } // namespace dom
 } // namespace mozilla

The Tor Browser / annotate

dom/camera/DOMCameraCapabilities.cpp@97036ab72558 (annotated)

dom/camera/DOMCameraCapabilities.cpp