C++ AutoInfallibleTArray类代码示例

void
BluetoothService::SetEnabled(bool aEnabled)
{
  MOZ_ASSERT(NS_IsMainThread());

  AutoInfallibleTArray<BluetoothParent*, 10> childActors;
  GetAllBluetoothActors(childActors);

  for (uint32_t index = 0; index < childActors.Length(); index++) {
    unused << childActors[index]->SendEnabled(aEnabled);
  }

  if (aEnabled) {
    BluetoothManagerList::ForwardIterator iter(mLiveManagers);
    nsString managerPath = NS_LITERAL_STRING("/");

    /**
     * Re-register managers since table mBluetoothSignalObserverTable was
     * cleared after turned off bluetooth
     */
    while (iter.HasMore()) {
      RegisterBluetoothSignalHandler(managerPath, (BluetoothSignalObserver*)iter.GetNext());
    }
  } else {
    mBluetoothSignalObserverTable.Clear();
  }

  /**
   * mEnabled: real status of bluetooth
   * aEnabled: expected status of bluetooth
   */
  if (mEnabled == aEnabled) {
    NS_WARNING("Bluetooth has already been enabled/disabled before\
                or the toggling is failed.");
  }

void
ClientLayerManager::ForwardTransaction()
{
  mPhase = PHASE_FORWARD;

  // forward this transaction's changeset to our LayerManagerComposite
  bool sent;
  AutoInfallibleTArray<EditReply, 10> replies;
  if (HasShadowManager() && mForwarder->EndTransaction(&replies, &sent)) {
    for (nsTArray<EditReply>::size_type i = 0; i < replies.Length(); ++i) {
      const EditReply& reply = replies[i];

      switch (reply.type()) {
      case EditReply::TOpContentBufferSwap: {
        MOZ_LAYERS_LOG(("[LayersForwarder] DoubleBufferSwap"));

        const OpContentBufferSwap& obs = reply.get_OpContentBufferSwap();

        CompositableChild* compositableChild =
          static_cast<CompositableChild*>(obs.compositableChild());
        ContentClientRemote* contentClient =
          static_cast<ContentClientRemote*>(compositableChild->GetCompositableClient());
        MOZ_ASSERT(contentClient);

        contentClient->SwapBuffers(obs.frontUpdatedRegion());

        break;
      }
      case EditReply::TOpTextureSwap: {
        MOZ_LAYERS_LOG(("[LayersForwarder] TextureSwap"));

        const OpTextureSwap& ots = reply.get_OpTextureSwap();

        CompositableChild* compositableChild =
          static_cast<CompositableChild*>(ots.compositableChild());
        MOZ_ASSERT(compositableChild);

        compositableChild->GetCompositableClient()
          ->SetDescriptorFromReply(ots.textureId(), ots.image());
        break;
      }

      default:
        NS_RUNTIMEABORT("not reached");
      }
    }

    if (sent) {
      mNeedsComposite = false;
    }
  } else if (HasShadowManager()) {
    NS_WARNING("failed to forward Layers transaction");
  }

  mPhase = PHASE_NONE;

  // this may result in Layers being deleted, which results in
  // PLayer::Send__delete__() and DeallocShmem()
  mKeepAlive.Clear();
}

void
BluetoothService::SetEnabled(bool aEnabled)
{
  MOZ_ASSERT(NS_IsMainThread());

  if (aEnabled == mEnabled) {
    // Nothing to do, maybe something failed.
    return;
  }

  mEnabled = aEnabled;

  AutoInfallibleTArray<BluetoothParent*, 10> childActors;
  GetAllBluetoothActors(childActors);

  for (uint32_t index = 0; index < childActors.Length(); index++) {
    unused << childActors[index]->SendEnabled(aEnabled);
  }

  BluetoothManagerList::ForwardIterator iter(mLiveManagers);
  while (iter.HasMore()) {
    if (NS_FAILED(iter.GetNext()->FireEnabledDisabledEvent(aEnabled))) {
      NS_WARNING("FireEnabledDisabledEvent failed!");
    }
  }
}

void
BluetoothService::SetEnabled(bool aEnabled)
{
  MOZ_ASSERT(NS_IsMainThread());

  AutoInfallibleTArray<BluetoothParent*, 10> childActors;
  GetAllBluetoothActors(childActors);

  for (uint32_t index = 0; index < childActors.Length(); index++) {
    unused << childActors[index]->SendEnabled(aEnabled);
  }

  if (!aEnabled) {
    /**
     * Remove all handlers except BluetoothManager when turning off bluetooth
     * since it is possible that the event 'onAdapterAdded' would be fired after
     * BluetoothManagers of child process are registered. Please see Bug 827759
     * for more details.
     */
    mBluetoothSignalObserverTable.Enumerate(
      RemoveObserversExceptBluetoothManager, nullptr);
  }

  /**
   * mEnabled: real status of bluetooth
   * aEnabled: expected status of bluetooth
   */
  if (mEnabled == aEnabled) {
    NS_WARNING("Bluetooth has already been enabled/disabled before\
                or the toggling is failed.");
  }

// static
bool
PluginScriptableObjectParent::ScriptableEnumerate(NPObject* aObject,
                                                  NPIdentifier** aIdentifiers,
                                                  uint32_t* aCount)
{
  if (aObject->_class != GetClass()) {
    NS_ERROR("Don't know what kind of object this is!");
    return false;
  }

  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
  if (object->invalidated) {
    NS_WARNING("Calling method on an invalidated object!");
    return false;
  }

  ProtectedActor<PluginScriptableObjectParent> actor(object->parent);
  if (!actor) {
    return false;
  }

  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");

  const NPNetscapeFuncs* npn = GetNetscapeFuncs(aObject);
  if (!npn) {
    NS_ERROR("No netscape funcs!");
    return false;
  }

  AutoInfallibleTArray<PPluginIdentifierParent*, 10> identifiers;
  bool success;
  if (!actor->CallEnumerate(&identifiers, &success)) {
    NS_WARNING("Failed to send message!");
    return false;
  }

  if (!success) {
    return false;
  }

  *aCount = identifiers.Length();
  if (!*aCount) {
    *aIdentifiers = nullptr;
    return true;
  }

  *aIdentifiers = (NPIdentifier*)npn->memalloc(*aCount * sizeof(NPIdentifier));
  if (!*aIdentifiers) {
    NS_ERROR("Out of memory!");
    return false;
  }

  for (uint32_t index = 0; index < *aCount; index++) {
    PluginIdentifierParent* id =
      static_cast<PluginIdentifierParent*>(identifiers[index]);
    (*aIdentifiers)[index] = id->ToNPIdentifier();
  }
  return true;
}

static nscoord
ComputeDescendantWidth(const nsHTMLReflowState& aAncestorReflowState,
                       nsIFrame *aDescendantFrame)
{
  nsIFrame *ancestorFrame = aAncestorReflowState.frame->FirstInFlow();
  if (aDescendantFrame == ancestorFrame) {
    return aAncestorReflowState.ComputedWidth();
  }

  AutoInfallibleTArray<nsIFrame*, 16> frames;
  for (nsIFrame *f = aDescendantFrame; f != ancestorFrame;
       f = f->GetParent()->FirstInFlow()) {
    frames.AppendElement(f);
  }

  // This ignores the width contributions made by scrollbars, though in
  // reality we don't have any scrollbars on the sorts of devices on
  // which we use font inflation, so it's not a problem.  But it may
  // occasionally cause problems when writing tests on desktop.

  uint32_t len = frames.Length();
  nsHTMLReflowState *reflowStates = static_cast<nsHTMLReflowState*>
                                (moz_xmalloc(sizeof(nsHTMLReflowState) * len));
  nsPresContext *presContext = aDescendantFrame->PresContext();
  for (uint32_t i = 0; i < len; ++i) {
    const nsHTMLReflowState &parentReflowState =
      (i == 0) ? aAncestorReflowState : reflowStates[i - 1];
    nsIFrame *frame = frames[len - i - 1];
    WritingMode wm = frame->GetWritingMode();
    LogicalSize availSize = parentReflowState.ComputedSize(wm);
    availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
    MOZ_ASSERT(frame->GetParent()->FirstInFlow() ==
                 parentReflowState.frame->FirstInFlow(),
               "bad logic in this function");
    new (reflowStates + i) nsHTMLReflowState(presContext, parentReflowState,
                                             frame, availSize);
  }

  MOZ_ASSERT(reflowStates[len - 1].frame == aDescendantFrame,
             "bad logic in this function");
  nscoord result = reflowStates[len - 1].ComputedWidth();

  for (uint32_t i = len; i-- != 0; ) {
    reflowStates[i].~nsHTMLReflowState();
  }
  moz_free(reflowStates);

  return result;
}

// static
bool
PluginScriptableObjectChild::ScriptableEnumerate(NPObject* aObject,
                                                 NPIdentifier** aIdentifiers,
                                                 uint32_t* aCount)
{
  AssertPluginThread();

  if (aObject->_class != GetClass()) {
    NS_RUNTIMEABORT("Don't know what kind of object this is!");
  }

  ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject);
  if (object->invalidated) {
    NS_WARNING("Calling method on an invalidated object!");
    return false;
  }

  ProtectedActor<PluginScriptableObjectChild> actor(object->parent);
  NS_ASSERTION(actor, "This shouldn't ever be null!");
  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");

  AutoInfallibleTArray<PPluginIdentifierChild*, 10> identifiers;
  bool success;
  actor->CallEnumerate(&identifiers, &success);

  if (!success) {
    return false;
  }

  *aCount = identifiers.Length();
  if (!*aCount) {
    *aIdentifiers = nsnull;
    return true;
  }

  *aIdentifiers = reinterpret_cast<NPIdentifier*>(
      PluginModuleChild::sBrowserFuncs.memalloc(*aCount * sizeof(NPIdentifier)));
  if (!*aIdentifiers) {
    NS_ERROR("Out of memory!");
    return false;
  }

  for (PRUint32 index = 0; index < *aCount; index++) {
    (*aIdentifiers)[index] =
      static_cast<PPluginIdentifierChild*>(identifiers[index]);
  }
  return true;
}

void
BluetoothService::SetEnabled(bool aEnabled)
{
  MOZ_ASSERT(NS_IsMainThread());

  AutoInfallibleTArray<BluetoothParent*, 10> childActors;
  GetAllBluetoothActors(childActors);

  for (uint32_t index = 0; index < childActors.Length(); index++) {
    unused << childActors[index]->SendEnabled(aEnabled);
  }

  if (aEnabled) {
    BluetoothManagerList::ForwardIterator iter(mLiveManagers);
    nsString managerPath = NS_LITERAL_STRING("/");

    /**
     * Re-register managers since table mBluetoothSignalObserverTable was
     * cleared after turned off bluetooth
     */
    while (iter.HasMore()) {
      RegisterBluetoothSignalHandler(managerPath, (BluetoothSignalObserver*)iter.GetNext());
    }
  } else {
    mBluetoothSignalObserverTable.Clear();
  }

  /**
   * mEnabled: real status of bluetooth
   * aEnabled: expected status of bluetooth
   */
  if (mEnabled == aEnabled) {
    /**
     * The process of toggling should be over here, so we set gToggleInProgress
     * back to false here. Note that, we don't fire onenabled/ondisabled in
     * this case.
     */
    NS_WARNING("Bluetooth has already been enabled/disabled before.\
                Skip fire onenabled/ondisabled events here.");
    gToggleInProgress = false;
    return;
  }

void
BluetoothService::SetEnabled(bool aEnabled)
{
  MOZ_ASSERT(NS_IsMainThread());

  AutoInfallibleTArray<BluetoothParent*, 10> childActors;
  GetAllBluetoothActors(childActors);

  for (uint32_t index = 0; index < childActors.Length(); index++) {
    unused << childActors[index]->SendEnabled(aEnabled);
  }

  /**
   * mEnabled: real status of bluetooth
   * aEnabled: expected status of bluetooth
   */
  if (mEnabled == aEnabled) {
    BT_WARNING("Bluetooth is already %s, or the toggling failed.",
               mEnabled ? "enabled" : "disabled");
  }

  mEnabled = aEnabled;
}

bool
ShadowLayerForwarder::EndTransaction(InfallibleTArray<EditReply>* aReplies,
                                     const nsIntRegion& aRegionToClear,
                                     uint64_t aId,
                                     bool aScheduleComposite,
                                     uint32_t aPaintSequenceNumber,
                                     bool aIsRepeatTransaction,
                                     bool* aSent)
{
  *aSent = false;

  MOZ_ASSERT(aId);

  PROFILER_LABEL("ShadowLayerForwarder", "EndTranscation",
    js::ProfileEntry::Category::GRAPHICS);

  RenderTraceScope rendertrace("Foward Transaction", "000091");
  NS_ABORT_IF_FALSE(HasShadowManager(), "no manager to forward to");
  NS_ABORT_IF_FALSE(!mTxn->Finished(), "forgot BeginTransaction?");

  DiagnosticTypes diagnostics = gfxPlatform::GetPlatform()->GetLayerDiagnosticTypes();
  if (mDiagnosticTypes != diagnostics) {
    mDiagnosticTypes = diagnostics;
    mTxn->AddEdit(OpSetDiagnosticTypes(diagnostics));
  }

  AutoTxnEnd _(mTxn);

  if (mTxn->Empty() && !mTxn->RotationChanged() && !mWindowOverlayChanged) {
    MOZ_LAYERS_LOG(("[LayersForwarder] 0-length cset (?) and no rotation event, skipping Update()"));
    return true;
  }

  MOZ_LAYERS_LOG(("[LayersForwarder] destroying buffers..."));

  MOZ_LAYERS_LOG(("[LayersForwarder] building transaction..."));

  // We purposely add attribute-change ops to the final changeset
  // before we add paint ops.  This allows layers to record the
  // attribute changes before new pixels arrive, which can be useful
  // for setting up back/front buffers.
  RenderTraceScope rendertrace2("Foward Transaction", "000092");
  for (ShadowableLayerSet::const_iterator it = mTxn->mMutants.begin();
       it != mTxn->mMutants.end(); ++it) {
    ShadowableLayer* shadow = *it;
    Layer* mutant = shadow->AsLayer();
    NS_ABORT_IF_FALSE(!!mutant, "unshadowable layer?");

    LayerAttributes attrs;
    CommonLayerAttributes& common = attrs.common();
    common.visibleRegion() = mutant->GetVisibleRegion();
    common.eventRegions() = mutant->GetEventRegions();
    common.postXScale() = mutant->GetPostXScale();
    common.postYScale() = mutant->GetPostYScale();
    common.transform() = mutant->GetBaseTransform();
    common.contentFlags() = mutant->GetContentFlags();
    common.opacity() = mutant->GetOpacity();
    common.useClipRect() = !!mutant->GetClipRect();
    common.clipRect() = (common.useClipRect() ?
                         *mutant->GetClipRect() : nsIntRect());
    common.isFixedPosition() = mutant->GetIsFixedPosition();
    common.fixedPositionAnchor() = mutant->GetFixedPositionAnchor();
    common.fixedPositionMargin() = mutant->GetFixedPositionMargins();
    common.isStickyPosition() = mutant->GetIsStickyPosition();
    if (mutant->GetIsStickyPosition()) {
      common.stickyScrollContainerId() = mutant->GetStickyScrollContainerId();
      common.stickyScrollRangeOuter() = mutant->GetStickyScrollRangeOuter();
      common.stickyScrollRangeInner() = mutant->GetStickyScrollRangeInner();
    }
    common.scrollbarTargetContainerId() = mutant->GetScrollbarTargetContainerId();
    common.scrollbarDirection() = mutant->GetScrollbarDirection();
    common.mixBlendMode() = (int8_t)mutant->GetMixBlendMode();
    common.forceIsolatedGroup() = mutant->GetForceIsolatedGroup();
    if (Layer* maskLayer = mutant->GetMaskLayer()) {
      common.maskLayerChild() = Shadow(maskLayer->AsShadowableLayer());
    } else {
      common.maskLayerChild() = nullptr;
    }
    common.maskLayerParent() = nullptr;
    common.animations() = mutant->GetAnimations();
    common.invalidRegion() = mutant->GetInvalidRegion();
    attrs.specific() = null_t();
    mutant->FillSpecificAttributes(attrs.specific());

    MOZ_LAYERS_LOG(("[LayersForwarder] OpSetLayerAttributes(%p)\n", mutant));

    mTxn->AddEdit(OpSetLayerAttributes(nullptr, Shadow(shadow), attrs));
  }

  AutoInfallibleTArray<Edit, 10> cset;
  size_t nCsets = mTxn->mCset.size() + mTxn->mPaints.size();
  NS_ABORT_IF_FALSE(nCsets > 0 || mWindowOverlayChanged, "should have bailed by now");

  cset.SetCapacity(nCsets);
  if (!mTxn->mCset.empty()) {
    cset.AppendElements(&mTxn->mCset.front(), mTxn->mCset.size());
  }
  // Paints after non-paint ops, including attribute changes.  See
  // above.
  if (!mTxn->mPaints.empty()) {
//.........这里部分代码省略.........

void
ClientLayerManager::ForwardTransaction(bool aScheduleComposite)
{
  mPhase = PHASE_FORWARD;

  mLatestTransactionId = mTransactionIdAllocator->GetTransactionId();
  TimeStamp transactionStart;
  if (!mTransactionIdAllocator->GetTransactionStart().IsNull()) {
    transactionStart = mTransactionIdAllocator->GetTransactionStart();
  } else {
    transactionStart = mTransactionStart;
  }

  // forward this transaction's changeset to our LayerManagerComposite
  bool sent;
  AutoInfallibleTArray<EditReply, 10> replies;
  if (mForwarder->EndTransaction(&replies, mRegionToClear,
        mLatestTransactionId, aScheduleComposite, mPaintSequenceNumber,
        mIsRepeatTransaction, transactionStart, &sent)) {
    for (nsTArray<EditReply>::size_type i = 0; i < replies.Length(); ++i) {
      const EditReply& reply = replies[i];

      switch (reply.type()) {
      case EditReply::TOpContentBufferSwap: {
        MOZ_LAYERS_LOG(("[LayersForwarder] DoubleBufferSwap"));

        const OpContentBufferSwap& obs = reply.get_OpContentBufferSwap();

        CompositableClient* compositable =
          CompositableClient::FromIPDLActor(obs.compositableChild());
        ContentClientRemote* contentClient =
          static_cast<ContentClientRemote*>(compositable);
        MOZ_ASSERT(contentClient);

        contentClient->SwapBuffers(obs.frontUpdatedRegion());

        break;
      }
      case EditReply::TOpTextureSwap: {
        MOZ_LAYERS_LOG(("[LayersForwarder] TextureSwap"));

        const OpTextureSwap& ots = reply.get_OpTextureSwap();

        CompositableClient* compositable =
          CompositableClient::FromIPDLActor(ots.compositableChild());
        MOZ_ASSERT(compositable);
        compositable->SetDescriptorFromReply(ots.textureId(), ots.image());
        break;
      }
      case EditReply::TReturnReleaseFence: {
        const ReturnReleaseFence& rep = reply.get_ReturnReleaseFence();
        FenceHandle fence = rep.fence();
        PTextureChild* child = rep.textureChild();

        if (!fence.IsValid() || !child) {
          break;
        }
        RefPtr<TextureClient> texture = TextureClient::AsTextureClient(child);
        if (texture) {
          texture->SetReleaseFenceHandle(fence);
        }
        break;
      }

      default:
        NS_RUNTIMEABORT("not reached");
      }
    }

    if (sent) {
      mNeedsComposite = false;
    }
  } else if (HasShadowManager()) {
    NS_WARNING("failed to forward Layers transaction");
  }

  if (!sent) {
    // Clear the transaction id so that it doesn't get returned
    // unless we forwarded to somewhere that doesn't actually
    // have a compositor.
    mTransactionIdAllocator->RevokeTransactionId(mLatestTransactionId);
  }

  mForwarder->RemoveTexturesIfNecessary();
  mForwarder->SendPendingAsyncMessge();
  mPhase = PHASE_NONE;

  // this may result in Layers being deleted, which results in
  // PLayer::Send__delete__() and DeallocShmem()
  mKeepAlive.Clear();
}

void
nsAnimationManager::BuildAnimations(nsStyleContext* aStyleContext,
                                    dom::Element* aTarget,
                                    dom::DocumentTimeline* aTimeline,
                                    AnimationPtrArray& aAnimations)
{
  MOZ_ASSERT(aAnimations.IsEmpty(), "expect empty array");

  ResolvedStyleCache resolvedStyles;

  const nsStyleDisplay *disp = aStyleContext->StyleDisplay();

  nsRefPtr<nsStyleContext> styleWithoutAnimation;

  for (size_t animIdx = 0, animEnd = disp->mAnimationNameCount;
       animIdx != animEnd; ++animIdx) {
    const StyleAnimation& src = disp->mAnimations[animIdx];

    // CSS Animations whose animation-name does not match a @keyframes rule do
    // not generate animation events. This includes when the animation-name is
    // "none" which is represented by an empty name in the StyleAnimation.
    // Since such animations neither affect style nor dispatch events, we do
    // not generate a corresponding Animation for them.
    nsCSSKeyframesRule* rule =
      src.GetName().IsEmpty()
      ? nullptr
      : mPresContext->StyleSet()->KeyframesRuleForName(src.GetName());
    if (!rule) {
      continue;
    }

    nsRefPtr<CSSAnimation> dest = new CSSAnimation(aTimeline);
    aAnimations.AppendElement(dest);

    AnimationTiming timing;
    timing.mIterationDuration =
      TimeDuration::FromMilliseconds(src.GetDuration());
    timing.mDelay = TimeDuration::FromMilliseconds(src.GetDelay());
    timing.mIterationCount = src.GetIterationCount();
    timing.mDirection = src.GetDirection();
    timing.mFillMode = src.GetFillMode();

    nsRefPtr<KeyframeEffectReadOnly> destEffect =
      new KeyframeEffectReadOnly(mPresContext->Document(), aTarget,
                                 aStyleContext->GetPseudoType(), timing,
                                 src.GetName());
    dest->SetEffect(destEffect);

    if (src.GetPlayState() == NS_STYLE_ANIMATION_PLAY_STATE_PAUSED) {
      dest->PauseFromStyle();
    } else {
      dest->PlayFromStyle();
    }

    // While current drafts of css3-animations say that later keyframes
    // with the same key entirely replace earlier ones (no cascading),
    // this is a bad idea and contradictory to the rest of CSS.  So
    // we're going to keep all the keyframes for each key and then do
    // the replacement on a per-property basis rather than a per-rule
    // basis, just like everything else in CSS.

    AutoInfallibleTArray<KeyframeData, 16> sortedKeyframes;

    for (uint32_t ruleIdx = 0, ruleEnd = rule->StyleRuleCount();
         ruleIdx != ruleEnd; ++ruleIdx) {
      css::Rule* cssRule = rule->GetStyleRuleAt(ruleIdx);
      MOZ_ASSERT(cssRule, "must have rule");
      MOZ_ASSERT(cssRule->GetType() == css::Rule::KEYFRAME_RULE,
                 "must be keyframe rule");
      nsCSSKeyframeRule *kfRule = static_cast<nsCSSKeyframeRule*>(cssRule);

      const nsTArray<float> &keys = kfRule->GetKeys();
      for (uint32_t keyIdx = 0, keyEnd = keys.Length();
           keyIdx != keyEnd; ++keyIdx) {
        float key = keys[keyIdx];
        // FIXME (spec):  The spec doesn't say what to do with
        // out-of-range keyframes.  We'll ignore them.
        if (0.0f <= key && key <= 1.0f) {
          KeyframeData *data = sortedKeyframes.AppendElement();
          data->mKey = key;
          data->mIndex = ruleIdx;
          data->mRule = kfRule;
        }
      }
    }

    sortedKeyframes.Sort(KeyframeDataComparator());

    if (sortedKeyframes.Length() == 0) {
      // no segments
      continue;
    }

    // Record the properties that are present in any keyframe rules we
    // are using.
    nsCSSPropertySet properties;

    for (uint32_t kfIdx = 0, kfEnd = sortedKeyframes.Length();
         kfIdx != kfEnd; ++kfIdx) {
      css::Declaration *decl = sortedKeyframes[kfIdx].mRule->Declaration();
//.........这里部分代码省略.........

void
ClientLayerManager::ForwardTransaction(bool aScheduleComposite)
{
  TimeStamp start = TimeStamp::Now();

  if (mForwarder->GetSyncObject()) {
    mForwarder->GetSyncObject()->FinalizeFrame();
  }

  mPhase = PHASE_FORWARD;

  mLatestTransactionId = mTransactionIdAllocator->GetTransactionId();
  TimeStamp transactionStart;
  if (!mTransactionIdAllocator->GetTransactionStart().IsNull()) {
    transactionStart = mTransactionIdAllocator->GetTransactionStart();
  } else {
    transactionStart = mTransactionStart;
  }

  // forward this transaction's changeset to our LayerManagerComposite
  bool sent;
  AutoInfallibleTArray<EditReply, 10> replies;
  if (mForwarder->EndTransaction(&replies, mRegionToClear,
        mLatestTransactionId, aScheduleComposite, mPaintSequenceNumber,
        mIsRepeatTransaction, transactionStart, &sent)) {
    for (nsTArray<EditReply>::size_type i = 0; i < replies.Length(); ++i) {
      const EditReply& reply = replies[i];

      switch (reply.type()) {
      case EditReply::TOpContentBufferSwap: {
        MOZ_LAYERS_LOG(("[LayersForwarder] DoubleBufferSwap"));

        const OpContentBufferSwap& obs = reply.get_OpContentBufferSwap();

        CompositableClient* compositable =
          CompositableClient::FromIPDLActor(obs.compositableChild());
        ContentClientRemote* contentClient =
          static_cast<ContentClientRemote*>(compositable);
        MOZ_ASSERT(contentClient);

        contentClient->SwapBuffers(obs.frontUpdatedRegion());

        break;
      }
      default:
        NS_RUNTIMEABORT("not reached");
      }
    }

    if (sent) {
      mNeedsComposite = false;
    }
  } else if (HasShadowManager()) {
    NS_WARNING("failed to forward Layers transaction");
  }

  if (!sent) {
    // Clear the transaction id so that it doesn't get returned
    // unless we forwarded to somewhere that doesn't actually
    // have a compositor.
    mTransactionIdAllocator->RevokeTransactionId(mLatestTransactionId);
  }

  mForwarder->RemoveTexturesIfNecessary();
  mForwarder->RemoveCompositablesIfNecessary();
  mForwarder->SendPendingAsyncMessges();
  mPhase = PHASE_NONE;

  // this may result in Layers being deleted, which results in
  // PLayer::Send__delete__() and DeallocShmem()
  mKeepAlive.Clear();

  TabChild* window = mWidget->GetOwningTabChild();
  if (window) {
    TimeStamp end = TimeStamp::Now();
    window->DidRequestComposite(start, end);
  }
}

void
nsAnimationManager::BuildAnimations(nsStyleContext* aStyleContext,
                                    InfallibleTArray<ElementAnimation>& aAnimations)
{
  NS_ABORT_IF_FALSE(aAnimations.IsEmpty(), "expect empty array");

  ResolvedStyleCache resolvedStyles;

  const nsStyleDisplay *disp = aStyleContext->StyleDisplay();
  TimeStamp now = mPresContext->RefreshDriver()->MostRecentRefresh();
  for (uint32_t animIdx = 0, animEnd = disp->mAnimationNameCount;
       animIdx != animEnd; ++animIdx) {
    const nsAnimation& aSrc = disp->mAnimations[animIdx];
    ElementAnimation& aDest = *aAnimations.AppendElement();

    aDest.mName = aSrc.GetName();
    aDest.mIterationCount = aSrc.GetIterationCount();
    aDest.mDirection = aSrc.GetDirection();
    aDest.mFillMode = aSrc.GetFillMode();
    aDest.mPlayState = aSrc.GetPlayState();

    aDest.mDelay = TimeDuration::FromMilliseconds(aSrc.GetDelay());
    aDest.mStartTime = now;
    if (aDest.IsPaused()) {
      aDest.mPauseStart = now;
    } else {
      aDest.mPauseStart = TimeStamp();
    }

    aDest.mIterationDuration = TimeDuration::FromMilliseconds(aSrc.GetDuration());

    nsCSSKeyframesRule *rule = KeyframesRuleFor(aDest.mName);
    if (!rule) {
      // no segments
      continue;
    }

    // While current drafts of css3-animations say that later keyframes
    // with the same key entirely replace earlier ones (no cascading),
    // this is a bad idea and contradictory to the rest of CSS.  So
    // we're going to keep all the keyframes for each key and then do
    // the replacement on a per-property basis rather than a per-rule
    // basis, just like everything else in CSS.

    AutoInfallibleTArray<KeyframeData, 16> sortedKeyframes;

    for (uint32_t ruleIdx = 0, ruleEnd = rule->StyleRuleCount();
         ruleIdx != ruleEnd; ++ruleIdx) {
      css::Rule* cssRule = rule->GetStyleRuleAt(ruleIdx);
      NS_ABORT_IF_FALSE(cssRule, "must have rule");
      NS_ABORT_IF_FALSE(cssRule->GetType() == css::Rule::KEYFRAME_RULE,
                        "must be keyframe rule");
      nsCSSKeyframeRule *kfRule = static_cast<nsCSSKeyframeRule*>(cssRule);

      const nsTArray<float> &keys = kfRule->GetKeys();
      for (uint32_t keyIdx = 0, keyEnd = keys.Length();
           keyIdx != keyEnd; ++keyIdx) {
        float key = keys[keyIdx];
        // FIXME (spec):  The spec doesn't say what to do with
        // out-of-range keyframes.  We'll ignore them.
        // (And PercentageHashKey currently assumes we either ignore or
        // clamp them.)
        if (0.0f <= key && key <= 1.0f) {
          KeyframeData *data = sortedKeyframes.AppendElement();
          data->mKey = key;
          data->mIndex = ruleIdx;
          data->mRule = kfRule;
        }
      }
    }

    sortedKeyframes.Sort(KeyframeDataComparator());

    if (sortedKeyframes.Length() == 0) {
      // no segments
      continue;
    }

    // Record the properties that are present in any keyframe rules we
    // are using.
    nsCSSPropertySet properties;

    for (uint32_t kfIdx = 0, kfEnd = sortedKeyframes.Length();
         kfIdx != kfEnd; ++kfIdx) {
      css::Declaration *decl = sortedKeyframes[kfIdx].mRule->Declaration();
      for (uint32_t propIdx = 0, propEnd = decl->Count();
           propIdx != propEnd; ++propIdx) {
        properties.AddProperty(decl->OrderValueAt(propIdx));
      }
    }

    for (nsCSSProperty prop = nsCSSProperty(0);
         prop < eCSSProperty_COUNT_no_shorthands;
         prop = nsCSSProperty(prop + 1)) {
      if (!properties.HasProperty(prop) ||
          nsCSSProps::kAnimTypeTable[prop] == eStyleAnimType_None) {
        continue;
      }

      // Build a list of the keyframes to use for this property.  This
//.........这里部分代码省略.........

void
ClientLayerManager::ForwardTransaction()
{
  mPhase = PHASE_FORWARD;

  // forward this transaction's changeset to our LayerManagerComposite
  AutoInfallibleTArray<EditReply, 10> replies;
  if (HasShadowManager() && ShadowLayerForwarder::EndTransaction(&replies)) {
    for (nsTArray<EditReply>::size_type i = 0; i < replies.Length(); ++i) {
      const EditReply& reply = replies[i];

      switch (reply.type()) {
      case EditReply::TOpContentBufferSwap: {
        MOZ_LAYERS_LOG(("[LayersForwarder] DoubleBufferSwap"));

        const OpContentBufferSwap& obs = reply.get_OpContentBufferSwap();

        CompositableChild* compositableChild =
          static_cast<CompositableChild*>(obs.compositableChild());
        ContentClientRemote* contentClient =
          static_cast<ContentClientRemote*>(compositableChild->GetCompositableClient());
        MOZ_ASSERT(contentClient);

        contentClient->SwapBuffers(obs.frontUpdatedRegion());

        break;
      }
      case EditReply::TOpTextureSwap: {
        MOZ_LAYERS_LOG(("[LayersForwarder] TextureSwap"));

        const OpTextureSwap& ots = reply.get_OpTextureSwap();

        CompositableChild* compositableChild =
          static_cast<CompositableChild*>(ots.compositableChild());
        MOZ_ASSERT(compositableChild);

        compositableChild->GetCompositableClient()
          ->SetDescriptorFromReply(ots.textureId(), ots.image());
        break;
      }
      case EditReply::TReplyTextureRemoved: {
        // XXX - to manage reuse of gralloc buffers, we'll need to add some
        // glue code here to find the TextureClient and invoke a callback to
        // let the camera know that the gralloc buffer is not used anymore on
        // the compositor side and that it can reuse it.
        break;
      }

      default:
        NS_RUNTIMEABORT("not reached");
      }
    }
  } else if (HasShadowManager()) {
    NS_WARNING("failed to forward Layers transaction");
  }

  mPhase = PHASE_NONE;

  // this may result in Layers being deleted, which results in
  // PLayer::Send__delete__() and DeallocShmem()
  mKeepAlive.Clear();
}