DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (4a108e94d3e2)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* 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 "base/basictypes.h"

#include "BasicLayers.h"
#include "gfxPrefs.h"
#ifdef MOZ_ENABLE_D3D9_LAYER
# include "LayerManagerD3D9.h"
#endif //MOZ_ENABLE_D3D9_LAYER
#include "mozilla/BrowserElementParent.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/TabParent.h"
#include "mozilla/layers/APZCTreeManager.h"
#include "mozilla/layers/APZThreadUtils.h"
#include "mozilla/layers/CompositorParent.h"
#include "mozilla/layers/LayerTransactionParent.h"
#include "nsContentUtils.h"
#include "nsFocusManager.h"
#include "nsFrameLoader.h"
#include "nsIObserver.h"
#include "nsStyleStructInlines.h"
#include "nsSubDocumentFrame.h"
#include "nsView.h"
#include "nsViewportFrame.h"
#include "RenderFrameParent.h"
#include "mozilla/layers/LayerManagerComposite.h"
#include "mozilla/layers/CompositorChild.h"
#include "ClientLayerManager.h"
#include "FrameLayerBuilder.h"

using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::layers;

namespace mozilla {
namespace layout {

typedef FrameMetrics::ViewID ViewID;

/**
 * Gets the layer-pixel offset of aContainerFrame's content rect top-left
 * from the nearest display item reference frame (which we assume will be inducing
 * a ContainerLayer).
 */
static nsIntPoint
GetContentRectLayerOffset(nsIFrame* aContainerFrame, nsDisplayListBuilder* aBuilder)
{
  nscoord auPerDevPixel = aContainerFrame->PresContext()->AppUnitsPerDevPixel();

  // Offset to the content rect in case we have borders or padding
  // Note that aContainerFrame could be a reference frame itself, so
  // we need to be careful here to ensure that we call ToReferenceFrame
  // on aContainerFrame and not its parent.
  nsPoint frameOffset = aBuilder->ToReferenceFrame(aContainerFrame) +
    aContainerFrame->GetContentRectRelativeToSelf().TopLeft();

  return frameOffset.ToNearestPixels(auPerDevPixel);
}

// Return true iff |aManager| is a "temporary layer manager".  They're
// used for small software rendering tasks, like drawWindow.  That's
// currently implemented by a BasicLayerManager without a backing
// widget, and hence in non-retained mode.
inline static bool
IsTempLayerManager(LayerManager* aManager)
{
  return (mozilla::layers::LayersBackend::LAYERS_BASIC == aManager->GetBackendType() &&
          !static_cast<BasicLayerManager*>(aManager)->IsRetained());
}

already_AddRefed<LayerManager>
GetFrom(nsFrameLoader* aFrameLoader)
{
  nsIDocument* doc = aFrameLoader->GetOwnerDoc();
  if (!doc) {
    return nullptr;
  }
  return nsContentUtils::LayerManagerForDocument(doc);
}

class RemoteContentController : public GeckoContentController {
public:
  explicit RemoteContentController(RenderFrameParent* aRenderFrame)
    : mUILoop(MessageLoop::current())
    , mRenderFrame(aRenderFrame)
    , mHaveZoomConstraints(false)
  { }

  virtual void RequestContentRepaint(const FrameMetrics& aFrameMetrics) override
  {
    MOZ_ASSERT(NS_IsMainThread());
    if (mRenderFrame) {
      TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
      browser->UpdateFrame(aFrameMetrics);
    }
  }

  virtual void AcknowledgeScrollUpdate(const FrameMetrics::ViewID& aScrollId,
                                       const uint32_t& aScrollGeneration) override
  {
    if (MessageLoop::current() != mUILoop) {
      // We have to send this message from the "UI thread" (main
      // thread).
      mUILoop->PostTask(
        FROM_HERE,
        NewRunnableMethod(this, &RemoteContentController::AcknowledgeScrollUpdate,
                          aScrollId, aScrollGeneration));
      return;
    }
    if (mRenderFrame) {
      TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
      browser->AcknowledgeScrollUpdate(aScrollId, aScrollGeneration);
    }
  }

  virtual void HandleDoubleTap(const CSSPoint& aPoint,
                               int32_t aModifiers,
                               const ScrollableLayerGuid& aGuid) override
  {
    if (MessageLoop::current() != mUILoop) {
      // We have to send this message from the "UI thread" (main
      // thread).
      mUILoop->PostTask(
        FROM_HERE,
        NewRunnableMethod(this, &RemoteContentController::HandleDoubleTap,
                          aPoint, aModifiers, aGuid));
      return;
    }
    if (mRenderFrame) {
      TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
      browser->HandleDoubleTap(aPoint, aModifiers, aGuid);
    }
  }

  virtual void HandleSingleTap(const CSSPoint& aPoint,
                               int32_t aModifiers,
                               const ScrollableLayerGuid& aGuid) override
  {
    if (MessageLoop::current() != mUILoop) {
      // We have to send this message from the "UI thread" (main
      // thread).
      mUILoop->PostTask(
        FROM_HERE,
        NewRunnableMethod(this, &RemoteContentController::HandleSingleTap,
                          aPoint, aModifiers, aGuid));
      return;
    }
    if (mRenderFrame) {
      mRenderFrame->TakeFocusForClick();
      TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
      browser->HandleSingleTap(aPoint, aModifiers, aGuid);
    }
  }

  virtual void HandleLongTap(const CSSPoint& aPoint,
                             int32_t aModifiers,
                             const ScrollableLayerGuid& aGuid,
                             uint64_t aInputBlockId) override
  {
    if (MessageLoop::current() != mUILoop) {
      // We have to send this message from the "UI thread" (main
      // thread).
      mUILoop->PostTask(
        FROM_HERE,
        NewRunnableMethod(this, &RemoteContentController::HandleLongTap,
                          aPoint, aModifiers, aGuid, aInputBlockId));
      return;
    }
    if (mRenderFrame) {
      TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
      browser->HandleLongTap(aPoint, aModifiers, aGuid, aInputBlockId);
    }
  }

  virtual void HandleLongTapUp(const CSSPoint& aPoint,
                               int32_t aModifiers,
                               const ScrollableLayerGuid& aGuid) override
  {
    if (MessageLoop::current() != mUILoop) {
      // We have to send this message from the "UI thread" (main
      // thread).
      mUILoop->PostTask(
        FROM_HERE,
        NewRunnableMethod(this, &RemoteContentController::HandleLongTapUp,
                          aPoint, aModifiers, aGuid));
      return;
    }
    if (mRenderFrame) {
      TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
      browser->HandleLongTapUp(aPoint, aModifiers, aGuid);
    }
  }

  void ClearRenderFrame() { mRenderFrame = nullptr; }

  virtual void SendAsyncScrollDOMEvent(bool aIsRoot,
                                       const CSSRect& aContentRect,
                                       const CSSSize& aContentSize) override
  {
    if (MessageLoop::current() != mUILoop) {
      mUILoop->PostTask(
        FROM_HERE,
        NewRunnableMethod(this,
                          &RemoteContentController::SendAsyncScrollDOMEvent,
                          aIsRoot, aContentRect, aContentSize));
      return;
    }
    if (mRenderFrame && aIsRoot) {
      TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
      BrowserElementParent::DispatchAsyncScrollEvent(browser, aContentRect,
                                                     aContentSize);
    }
  }

  virtual void PostDelayedTask(Task* aTask, int aDelayMs) override
  {
    MessageLoop::current()->PostDelayedTask(FROM_HERE, aTask, aDelayMs);
  }

  virtual bool GetRootZoomConstraints(ZoomConstraints* aOutConstraints) override
  {
    if (mHaveZoomConstraints && aOutConstraints) {
      *aOutConstraints = mZoomConstraints;
    }
    return mHaveZoomConstraints;
  }

  virtual bool GetTouchSensitiveRegion(CSSRect* aOutRegion) override
  {
    if (mTouchSensitiveRegion.IsEmpty())
      return false;

    *aOutRegion = CSSRect::FromAppUnits(mTouchSensitiveRegion.GetBounds());
    return true;
  }

  virtual void NotifyAPZStateChange(const ScrollableLayerGuid& aGuid,
                                    APZStateChange aChange,
                                    int aArg) override
  {
    if (MessageLoop::current() != mUILoop) {
      mUILoop->PostTask(
        FROM_HERE,
        NewRunnableMethod(this, &RemoteContentController::NotifyAPZStateChange,
                          aGuid, aChange, aArg));
      return;
    }
    if (mRenderFrame) {
      TabParent* browser = TabParent::GetFrom(mRenderFrame->Manager());
      browser->NotifyAPZStateChange(aGuid.mScrollId, aChange, aArg);
    }
  }

  // Methods used by RenderFrameParent to set fields stored here.

  void SaveZoomConstraints(const ZoomConstraints& aConstraints)
  {
    mHaveZoomConstraints = true;
    mZoomConstraints = aConstraints;
  }

  void SetTouchSensitiveRegion(const nsRegion& aRegion)
  {
    mTouchSensitiveRegion = aRegion;
  }
private:
  MessageLoop* mUILoop;
  RenderFrameParent* mRenderFrame;

  bool mHaveZoomConstraints;
  ZoomConstraints mZoomConstraints;
  nsRegion mTouchSensitiveRegion;
};

RenderFrameParent::RenderFrameParent(nsFrameLoader* aFrameLoader,
                                     ScrollingBehavior aScrollingBehavior,
                                     TextureFactoryIdentifier* aTextureFactoryIdentifier,
                                     uint64_t* aId,
                                     bool* aSuccess)
  : mLayersId(0)
  , mFrameLoader(aFrameLoader)
  , mFrameLoaderDestroyed(false)
  , mBackgroundColor(gfxRGBA(1, 1, 1))
{
  *aSuccess = false;
  if (!mFrameLoader) {
    return;
  }

  *aId = 0;

  nsRefPtr<LayerManager> lm = GetFrom(mFrameLoader);
  // Perhaps the document containing this frame currently has no presentation?
  if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
    *aTextureFactoryIdentifier =
      static_cast<ClientLayerManager*>(lm.get())->GetTextureFactoryIdentifier();
  } else {
    *aTextureFactoryIdentifier = TextureFactoryIdentifier();
  }

  if (XRE_GetProcessType() == GeckoProcessType_Default) {
    // Our remote frame will push layers updates to the compositor,
    // and we'll keep an indirect reference to that tree.
    *aId = mLayersId = CompositorParent::AllocateLayerTreeId();
    if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
      ClientLayerManager *clientManager =
        static_cast<ClientLayerManager*>(lm.get());
      clientManager->GetRemoteRenderer()->SendNotifyChildCreated(mLayersId);
    }
    if (aScrollingBehavior == ASYNC_PAN_ZOOM) {
      mContentController = new RemoteContentController(this);
      CompositorParent::SetControllerForLayerTree(mLayersId, mContentController);
    }
  } else if (XRE_GetProcessType() == GeckoProcessType_Content) {
    ContentChild::GetSingleton()->SendAllocateLayerTreeId(aId);
    mLayersId = *aId;
    CompositorChild::Get()->SendNotifyChildCreated(mLayersId);
  }
  // Set a default RenderFrameParent
  mFrameLoader->SetCurrentRemoteFrame(this);
  *aSuccess = true;
}

APZCTreeManager*
RenderFrameParent::GetApzcTreeManager()
{
  // We can't get a ref to the APZCTreeManager until after the child is
  // created and the static getter knows which CompositorParent is
  // instantiated with this layers ID. That's why try to fetch it when
  // we first need it and cache the result.
  if (!mApzcTreeManager && gfxPrefs::AsyncPanZoomEnabled()) {
    mApzcTreeManager = CompositorParent::GetAPZCTreeManager(mLayersId);
  }
  return mApzcTreeManager.get();
}

RenderFrameParent::~RenderFrameParent()
{}

void
RenderFrameParent::Destroy()
{
  mFrameLoaderDestroyed = true;
}

already_AddRefed<Layer>
RenderFrameParent::BuildLayer(nsDisplayListBuilder* aBuilder,
                              nsIFrame* aFrame,
                              LayerManager* aManager,
                              const nsIntRect& aVisibleRect,
                              nsDisplayItem* aItem,
                              const ContainerLayerParameters& aContainerParameters)
{
  MOZ_ASSERT(aFrame,
             "makes no sense to have a shadow tree without a frame");
  MOZ_ASSERT(!mContainer ||
             IsTempLayerManager(aManager) ||
             mContainer->Manager() == aManager,
             "retaining manager changed out from under us ... HELP!");

  if (IsTempLayerManager(aManager) ||
      (mContainer && mContainer->Manager() != aManager)) {
    // This can happen if aManager is a "temporary" manager, or if the
    // widget's layer manager changed out from under us.  We need to
    // FIXME handle the former case somehow, probably with an API to
    // draw a manager's subtree.  The latter is bad bad bad, but the the
    // MOZ_ASSERT() above will flag it.  Returning nullptr here will just
    // cause the shadow subtree not to be rendered.
    NS_WARNING("Remote iframe not rendered");
    return nullptr;
  }

  uint64_t id = GetLayerTreeId();
  if (!id) {
    return nullptr;
  }

  nsRefPtr<Layer> layer =
    (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, aItem));
  if (!layer) {
    layer = aManager->CreateRefLayer();
  }
  if (!layer) {
    // Probably a temporary layer manager that doesn't know how to
    // use ref layers.
    return nullptr;
  }
  static_cast<RefLayer*>(layer.get())->SetReferentId(id);
  nsIntPoint offset = GetContentRectLayerOffset(aFrame, aBuilder);
  // We can only have an offset if we're a child of an inactive
  // container, but our display item is LAYER_ACTIVE_FORCE which
  // forces all layers above to be active.
  MOZ_ASSERT(aContainerParameters.mOffset == nsIntPoint());
  gfx::Matrix4x4 m = gfx::Matrix4x4::Translation(offset.x, offset.y, 0.0);
  // Remote content can't be repainted by us, so we multiply down
  // the resolution that our container expects onto our container.
  m.PreScale(aContainerParameters.mXScale, aContainerParameters.mYScale, 1.0);
  layer->SetBaseTransform(m);

  return layer.forget();
}

void
RenderFrameParent::OwnerContentChanged(nsIContent* aContent)
{
  MOZ_ASSERT(mFrameLoader->GetOwnerContent() == aContent,
             "Don't build new map if owner is same!");

  nsRefPtr<LayerManager> lm = GetFrom(mFrameLoader);
  // Perhaps the document containing this frame currently has no presentation?
  if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
    ClientLayerManager *clientManager =
      static_cast<ClientLayerManager*>(lm.get());
    clientManager->GetRemoteRenderer()->SendAdoptChild(mLayersId);
  }
}

void
RenderFrameParent::ActorDestroy(ActorDestroyReason why)
{
  if (mLayersId != 0) {
    if (XRE_GetProcessType() == GeckoProcessType_Content) {
      ContentChild::GetSingleton()->SendDeallocateLayerTreeId(mLayersId);
    } else {
      CompositorParent::DeallocateLayerTreeId(mLayersId);
    }
    if (mContentController) {
      // Stop our content controller from requesting repaints of our
      // content.
      mContentController->ClearRenderFrame();
      // TODO: notify the compositor?
    }
  }

  if (mFrameLoader && mFrameLoader->GetCurrentRemoteFrame() == this) {
    // XXX this might cause some weird issues ... we'll just not
    // redraw the part of the window covered by this until the "next"
    // remote frame has a layer-tree transaction.  For
    // why==NormalShutdown, we'll definitely want to do something
    // better, especially as nothing guarantees another Update() from
    // the "next" remote layer tree.
    mFrameLoader->SetCurrentRemoteFrame(nullptr);
  }
  mFrameLoader = nullptr;
}

bool
RenderFrameParent::RecvNotifyCompositorTransaction()
{
  TriggerRepaint();
  return true;
}

bool
RenderFrameParent::RecvUpdateHitRegion(const nsRegion& aRegion)
{
  mTouchRegion = aRegion;
  if (mContentController) {
    // Tell the content controller about the touch-sensitive region, so
    // that it can provide it to APZ. This is required for APZ to do
    // correct hit testing for a remote 'mozpasspointerevents' iframe
    // until bug 928833 is fixed.
    mContentController->SetTouchSensitiveRegion(aRegion);
  }
  return true;
}

void
RenderFrameParent::TriggerRepaint()
{
  mFrameLoader->SetCurrentRemoteFrame(this);

  nsIFrame* docFrame = mFrameLoader->GetPrimaryFrameOfOwningContent();
  if (!docFrame) {
    // Bad, but nothing we can do about it (XXX/cjones: or is there?
    // maybe bug 589337?).  When the new frame is created, we'll
    // probably still be the current render frame and will get to draw
    // our content then.  Or, we're shutting down and this update goes
    // to /dev/null.
    return;
  }

  docFrame->InvalidateLayer(nsDisplayItem::TYPE_REMOTE);
}

uint64_t
RenderFrameParent::GetLayerTreeId() const
{
  return mLayersId;
}

void
RenderFrameParent::BuildDisplayList(nsDisplayListBuilder* aBuilder,
                                    nsSubDocumentFrame* aFrame,
                                    const nsRect& aDirtyRect,
                                    const nsDisplayListSet& aLists)
{
  // We're the subdoc for <browser remote="true"> and it has
  // painted content.  Display its shadow layer tree.
  DisplayListClipState::AutoSaveRestore clipState(aBuilder);

  nsPoint offset = aBuilder->ToReferenceFrame(aFrame);
  nsRect bounds = aFrame->EnsureInnerView()->GetBounds() + offset;
  clipState.ClipContentDescendants(bounds);

  aLists.Content()->AppendToTop(
    new (aBuilder) nsDisplayRemote(aBuilder, aFrame, this));
}

void
RenderFrameParent::ZoomToRect(uint32_t aPresShellId, ViewID aViewId,
                              const CSSRect& aRect)
{
  if (GetApzcTreeManager()) {
    GetApzcTreeManager()->ZoomToRect(ScrollableLayerGuid(mLayersId, aPresShellId, aViewId),
                                     aRect);
  }
}

void
RenderFrameParent::ContentReceivedInputBlock(const ScrollableLayerGuid& aGuid,
                                             uint64_t aInputBlockId,
                                             bool aPreventDefault)
{
  if (aGuid.mLayersId != mLayersId) {
    // Guard against bad data from hijacked child processes
    NS_ERROR("Unexpected layers id in ContentReceivedInputBlock; dropping message...");
    return;
  }
  if (GetApzcTreeManager()) {
    APZThreadUtils::RunOnControllerThread(NewRunnableMethod(
        GetApzcTreeManager(), &APZCTreeManager::ContentReceivedInputBlock,
        aInputBlockId, aPreventDefault));
  }
}

void
RenderFrameParent::SetTargetAPZC(uint64_t aInputBlockId,
                                 const nsTArray<ScrollableLayerGuid>& aTargets)
{
  for (size_t i = 0; i < aTargets.Length(); i++) {
    if (aTargets[i].mLayersId != mLayersId) {
      // Guard against bad data from hijacked child processes
      NS_ERROR("Unexpected layers id in SetTargetAPZC; dropping message...");
      return;
    }
  }
  if (GetApzcTreeManager()) {
    // need a local var to disambiguate between the SetTargetAPZC overloads.
    void (APZCTreeManager::*setTargetApzcFunc)(uint64_t, const nsTArray<ScrollableLayerGuid>&)
        = &APZCTreeManager::SetTargetAPZC;
    APZThreadUtils::RunOnControllerThread(NewRunnableMethod(
        GetApzcTreeManager(), setTargetApzcFunc,
        aInputBlockId, aTargets));
  }
}

void
RenderFrameParent::UpdateZoomConstraints(uint32_t aPresShellId,
                                         ViewID aViewId,
                                         bool aIsRoot,
                                         const ZoomConstraints& aConstraints)
{
  if (mContentController && aIsRoot) {
    mContentController->SaveZoomConstraints(aConstraints);
  }
  if (GetApzcTreeManager()) {
    GetApzcTreeManager()->UpdateZoomConstraints(ScrollableLayerGuid(mLayersId, aPresShellId, aViewId),
                                                aConstraints);
  }
}

bool
RenderFrameParent::HitTest(const nsRect& aRect)
{
  return mTouchRegion.Contains(aRect);
}

void
RenderFrameParent::GetTextureFactoryIdentifier(TextureFactoryIdentifier* aTextureFactoryIdentifier)
{
  nsRefPtr<LayerManager> lm = GetFrom(mFrameLoader);
  // Perhaps the document containing this frame currently has no presentation?
  if (lm && lm->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
    *aTextureFactoryIdentifier =
      static_cast<ClientLayerManager*>(lm.get())->GetTextureFactoryIdentifier();
  } else {
    *aTextureFactoryIdentifier = TextureFactoryIdentifier();
  }
}

void
RenderFrameParent::TakeFocusForClick()
{
  nsIFocusManager* fm = nsFocusManager::GetFocusManager();
  if (!fm) {
    return;
  }
  nsCOMPtr<nsIContent> owner = mFrameLoader->GetOwnerContent();
  if (!owner) {
    return;
  }
  nsCOMPtr<nsIDOMElement> element = do_QueryInterface(owner);
  if (!element) {
    return;
  }
  fm->SetFocus(element, nsIFocusManager::FLAG_BYMOUSE |
                        nsIFocusManager::FLAG_NOSCROLL);
}

}  // namespace layout
}  // namespace mozilla

nsDisplayRemote::nsDisplayRemote(nsDisplayListBuilder* aBuilder,
                                 nsIFrame* aFrame,
                                 RenderFrameParent* aRemoteFrame)
  : nsDisplayItem(aBuilder, aFrame)
  , mRemoteFrame(aRemoteFrame)
  , mEventRegionsOverride(EventRegionsOverride::NoOverride)
{
  if (aBuilder->IsBuildingLayerEventRegions()) {
    if (aBuilder->IsInsidePointerEventsNoneDoc() ||
        aFrame->StyleVisibility()->GetEffectivePointerEvents(aFrame) == NS_STYLE_POINTER_EVENTS_NONE) {
      mEventRegionsOverride |= EventRegionsOverride::ForceEmptyHitRegion;
    }
    if (nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(aFrame->PresContext()->PresShell())) {
      mEventRegionsOverride |= EventRegionsOverride::ForceDispatchToContent;
    }
  }
}

already_AddRefed<Layer>
nsDisplayRemote::BuildLayer(nsDisplayListBuilder* aBuilder,
                            LayerManager* aManager,
                            const ContainerLayerParameters& aContainerParameters)
{
  int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
  nsIntRect visibleRect = GetVisibleRect().ToNearestPixels(appUnitsPerDevPixel);
  visibleRect += aContainerParameters.mOffset;
  nsRefPtr<Layer> layer = mRemoteFrame->BuildLayer(aBuilder, mFrame, aManager, visibleRect, this, aContainerParameters);
  if (layer && layer->AsContainerLayer()) {
    layer->AsContainerLayer()->SetEventRegionsOverride(mEventRegionsOverride);
  }
  return layer.forget();
}

void
nsDisplayRemote::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
                         HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
{
  if (mRemoteFrame->HitTest(aRect)) {
    aOutFrames->AppendElement(mFrame);
  }
}