gfx/tests/gtest/TestAsyncPanZoomController.cpp

changeset 0
6474c204b198
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/tests/gtest/TestAsyncPanZoomController.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,1202 @@
     1.4 +/* vim:set ts=2 sw=2 sts=2 et: */
     1.5 +/* Any copyright is dedicated to the Public Domain.
     1.6 + * http://creativecommons.org/publicdomain/zero/1.0/
     1.7 + */
     1.8 +
     1.9 +#include "gtest/gtest.h"
    1.10 +#include "gmock/gmock.h"
    1.11 +
    1.12 +#include "mozilla/Attributes.h"
    1.13 +#include "mozilla/layers/AsyncCompositionManager.h" // for ViewTransform
    1.14 +#include "mozilla/layers/AsyncPanZoomController.h"
    1.15 +#include "mozilla/layers/LayerManagerComposite.h"
    1.16 +#include "mozilla/layers/GeckoContentController.h"
    1.17 +#include "mozilla/layers/CompositorParent.h"
    1.18 +#include "mozilla/layers/APZCTreeManager.h"
    1.19 +#include "base/task.h"
    1.20 +#include "Layers.h"
    1.21 +#include "TestLayers.h"
    1.22 +#include "gfxPrefs.h"
    1.23 +
    1.24 +using namespace mozilla;
    1.25 +using namespace mozilla::gfx;
    1.26 +using namespace mozilla::layers;
    1.27 +using ::testing::_;
    1.28 +using ::testing::NiceMock;
    1.29 +using ::testing::AtLeast;
    1.30 +using ::testing::AtMost;
    1.31 +using ::testing::MockFunction;
    1.32 +using ::testing::InSequence;
    1.33 +
    1.34 +class Task;
    1.35 +
    1.36 +class AsyncPanZoomControllerTester : public ::testing::Test {
    1.37 +protected:
    1.38 +  virtual void SetUp() {
    1.39 +    gfxPrefs::GetSingleton();
    1.40 +  }
    1.41 +  virtual void TearDown() {
    1.42 +    gfxPrefs::DestroySingleton();
    1.43 +  }
    1.44 +};
    1.45 +
    1.46 +class APZCTreeManagerTester : public ::testing::Test {
    1.47 +protected:
    1.48 +  virtual void SetUp() {
    1.49 +    gfxPrefs::GetSingleton();
    1.50 +  }
    1.51 +  virtual void TearDown() {
    1.52 +    gfxPrefs::DestroySingleton();
    1.53 +  }
    1.54 +};
    1.55 +
    1.56 +class MockContentController : public GeckoContentController {
    1.57 +public:
    1.58 +  MOCK_METHOD1(RequestContentRepaint, void(const FrameMetrics&));
    1.59 +  MOCK_METHOD2(AcknowledgeScrollUpdate, void(const FrameMetrics::ViewID&, const uint32_t& aScrollGeneration));
    1.60 +  MOCK_METHOD3(HandleDoubleTap, void(const CSSPoint&, int32_t, const ScrollableLayerGuid&));
    1.61 +  MOCK_METHOD3(HandleSingleTap, void(const CSSPoint&, int32_t, const ScrollableLayerGuid&));
    1.62 +  MOCK_METHOD3(HandleLongTap, void(const CSSPoint&, int32_t, const ScrollableLayerGuid&));
    1.63 +  MOCK_METHOD3(HandleLongTapUp, void(const CSSPoint&, int32_t, const ScrollableLayerGuid&));
    1.64 +  MOCK_METHOD3(SendAsyncScrollDOMEvent, void(bool aIsRoot, const CSSRect &aContentRect, const CSSSize &aScrollableSize));
    1.65 +  MOCK_METHOD2(PostDelayedTask, void(Task* aTask, int aDelayMs));
    1.66 +};
    1.67 +
    1.68 +class MockContentControllerDelayed : public MockContentController {
    1.69 +public:
    1.70 +  MockContentControllerDelayed()
    1.71 +  {
    1.72 +  }
    1.73 +
    1.74 +  void PostDelayedTask(Task* aTask, int aDelayMs) {
    1.75 +    mTaskQueue.AppendElement(aTask);
    1.76 +  }
    1.77 +
    1.78 +  void CheckHasDelayedTask() {
    1.79 +    EXPECT_TRUE(mTaskQueue.Length() > 0);
    1.80 +  }
    1.81 +
    1.82 +  void ClearDelayedTask() {
    1.83 +    mTaskQueue.RemoveElementAt(0);
    1.84 +  }
    1.85 +
    1.86 +  void DestroyOldestTask() {
    1.87 +    delete mTaskQueue[0];
    1.88 +    mTaskQueue.RemoveElementAt(0);
    1.89 +  }
    1.90 +
    1.91 +  // Note that deleting mCurrentTask is important in order to
    1.92 +  // release the reference to the callee object. Without this
    1.93 +  // that object might be leaked. This is also why we don't
    1.94 +  // expose mTaskQueue to any users of MockContentControllerDelayed.
    1.95 +  void RunDelayedTask() {
    1.96 +    mTaskQueue[0]->Run();
    1.97 +    delete mTaskQueue[0];
    1.98 +    mTaskQueue.RemoveElementAt(0);
    1.99 +  }
   1.100 +
   1.101 +private:
   1.102 +  nsTArray<Task*> mTaskQueue;
   1.103 +};
   1.104 +
   1.105 +
   1.106 +class TestAPZCContainerLayer : public ContainerLayer {
   1.107 +  public:
   1.108 +    TestAPZCContainerLayer()
   1.109 +      : ContainerLayer(nullptr, nullptr)
   1.110 +    {}
   1.111 +  bool RemoveChild(Layer* aChild) { return true; }
   1.112 +  bool InsertAfter(Layer* aChild, Layer* aAfter) { return true; }
   1.113 +  void ComputeEffectiveTransforms(const Matrix4x4& aTransformToSurface) {}
   1.114 +  bool RepositionChild(Layer* aChild, Layer* aAfter) { return true; }
   1.115 +};
   1.116 +
   1.117 +class TestAsyncPanZoomController : public AsyncPanZoomController {
   1.118 +public:
   1.119 +  TestAsyncPanZoomController(uint64_t aLayersId, MockContentController* aMcc,
   1.120 +                             APZCTreeManager* aTreeManager = nullptr,
   1.121 +                             GestureBehavior aBehavior = DEFAULT_GESTURES)
   1.122 +    : AsyncPanZoomController(aLayersId, aTreeManager, aMcc, aBehavior)
   1.123 +  {}
   1.124 +
   1.125 +  // Since touch-action-enabled property is global - setting it for each test
   1.126 +  // separately isn't safe from the concurrency point of view. To make tests
   1.127 +  // run concurrent and independent from each other we have a member variable
   1.128 +  // mTouchActionEnabled for each apzc and setter defined here.
   1.129 +  void SetTouchActionEnabled(const bool touchActionEnabled) {
   1.130 +    ReentrantMonitorAutoEnter lock(mMonitor);
   1.131 +    mTouchActionPropertyEnabled = touchActionEnabled;
   1.132 +  }
   1.133 +
   1.134 +  void SetFrameMetrics(const FrameMetrics& metrics) {
   1.135 +    ReentrantMonitorAutoEnter lock(mMonitor);
   1.136 +    mFrameMetrics = metrics;
   1.137 +  }
   1.138 +
   1.139 +  FrameMetrics GetFrameMetrics() {
   1.140 +    ReentrantMonitorAutoEnter lock(mMonitor);
   1.141 +    return mFrameMetrics;
   1.142 +  }
   1.143 +};
   1.144 +
   1.145 +class TestAPZCTreeManager : public APZCTreeManager {
   1.146 +protected:
   1.147 +  void AssertOnCompositorThread() MOZ_OVERRIDE { /* no-op */ }
   1.148 +
   1.149 +public:
   1.150 +  // Expose this so test code can call it directly.
   1.151 +  void BuildOverscrollHandoffChain(AsyncPanZoomController* aApzc) {
   1.152 +    APZCTreeManager::BuildOverscrollHandoffChain(aApzc);
   1.153 +  }
   1.154 +};
   1.155 +
   1.156 +static
   1.157 +FrameMetrics TestFrameMetrics() {
   1.158 +  FrameMetrics fm;
   1.159 +
   1.160 +  fm.mDisplayPort = CSSRect(0, 0, 10, 10);
   1.161 +  fm.mCompositionBounds = ParentLayerIntRect(0, 0, 10, 10);
   1.162 +  fm.mCriticalDisplayPort = CSSRect(0, 0, 10, 10);
   1.163 +  fm.mScrollableRect = CSSRect(0, 0, 100, 100);
   1.164 +  fm.mViewport = CSSRect(0, 0, 10, 10);
   1.165 +
   1.166 +  return fm;
   1.167 +}
   1.168 +
   1.169 +/*
   1.170 + * Dispatches mock touch events to the apzc and checks whether apzc properly
   1.171 + * consumed them and triggered scrolling behavior.
   1.172 + */
   1.173 +static
   1.174 +void ApzcPan(AsyncPanZoomController* apzc,
   1.175 +             TestAPZCTreeManager* aTreeManager,
   1.176 +             int& aTime,
   1.177 +             int aTouchStartY,
   1.178 +             int aTouchEndY,
   1.179 +             bool expectIgnoredPan = false,
   1.180 +             bool hasTouchListeners = false,
   1.181 +             nsTArray<uint32_t>* aAllowedTouchBehaviors = nullptr) {
   1.182 +
   1.183 +  const int TIME_BETWEEN_TOUCH_EVENT = 100;
   1.184 +  const int OVERCOME_TOUCH_TOLERANCE = 100;
   1.185 +  MultiTouchInput mti;
   1.186 +  nsEventStatus status;
   1.187 +
   1.188 +  // Since we're passing inputs directly to the APZC instead of going through
   1.189 +  // the tree manager, we need to build the overscroll handoff chain explicitly
   1.190 +  // for panning to work correctly.
   1.191 +  aTreeManager->BuildOverscrollHandoffChain(apzc);
   1.192 +
   1.193 +  nsEventStatus touchStartStatus;
   1.194 +  if (hasTouchListeners) {
   1.195 +    // APZC shouldn't consume the start event now, instead queueing it up
   1.196 +    // waiting for content's response.
   1.197 +    touchStartStatus = nsEventStatus_eIgnore;
   1.198 +  } else {
   1.199 +    // APZC should go into the touching state and therefore consume the event.
   1.200 +    touchStartStatus = nsEventStatus_eConsumeNoDefault;
   1.201 +  }
   1.202 +
   1.203 +  mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_START, aTime, 0);
   1.204 +  aTime += TIME_BETWEEN_TOUCH_EVENT;
   1.205 +  // Make sure the move is large enough to not be handled as a tap
   1.206 +  mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(10, aTouchStartY+OVERCOME_TOUCH_TOLERANCE), ScreenSize(0, 0), 0, 0));
   1.207 +  status = apzc->ReceiveInputEvent(mti);
   1.208 +  EXPECT_EQ(touchStartStatus, status);
   1.209 +  // APZC should be in TOUCHING state
   1.210 +
   1.211 +  // Allowed touch behaviours must be set after sending touch-start.
   1.212 +  if (aAllowedTouchBehaviors) {
   1.213 +    apzc->SetAllowedTouchBehavior(*aAllowedTouchBehaviors);
   1.214 +  }
   1.215 +
   1.216 +  nsEventStatus touchMoveStatus;
   1.217 +  if (expectIgnoredPan) {
   1.218 +    // APZC should ignore panning, be in TOUCHING state and therefore return eIgnore.
   1.219 +    // The same applies to all consequent touch move events.
   1.220 +    touchMoveStatus = nsEventStatus_eIgnore;
   1.221 +  } else {
   1.222 +    // APZC should go into the panning state and therefore consume the event.
   1.223 +    touchMoveStatus = nsEventStatus_eConsumeNoDefault;
   1.224 +  }
   1.225 +
   1.226 +  mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, aTime, 0);
   1.227 +  aTime += TIME_BETWEEN_TOUCH_EVENT;
   1.228 +  mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(10, aTouchStartY), ScreenSize(0, 0), 0, 0));
   1.229 +  status = apzc->ReceiveInputEvent(mti);
   1.230 +  EXPECT_EQ(touchMoveStatus, status);
   1.231 +
   1.232 +  mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, aTime, 0);
   1.233 +  aTime += TIME_BETWEEN_TOUCH_EVENT;
   1.234 +  mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(10, aTouchEndY), ScreenSize(0, 0), 0, 0));
   1.235 +  status = apzc->ReceiveInputEvent(mti);
   1.236 +  EXPECT_EQ(touchMoveStatus, status);
   1.237 +
   1.238 +  mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_END, aTime, 0);
   1.239 +  aTime += TIME_BETWEEN_TOUCH_EVENT;
   1.240 +  mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(10, aTouchEndY), ScreenSize(0, 0), 0, 0));
   1.241 +  status = apzc->ReceiveInputEvent(mti);
   1.242 +}
   1.243 +
   1.244 +static
   1.245 +void DoPanTest(bool aShouldTriggerScroll, bool aShouldUseTouchAction, uint32_t aBehavior)
   1.246 +{
   1.247 +  TimeStamp testStartTime = TimeStamp::Now();
   1.248 +  AsyncPanZoomController::SetFrameTime(testStartTime);
   1.249 +
   1.250 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.251 +  nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   1.252 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc, tm);
   1.253 +
   1.254 +  apzc->SetTouchActionEnabled(aShouldUseTouchAction);
   1.255 +  apzc->SetFrameMetrics(TestFrameMetrics());
   1.256 +  apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   1.257 +
   1.258 +  if (aShouldTriggerScroll) {
   1.259 +    EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   1.260 +    EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   1.261 +  } else {
   1.262 +    EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(0);
   1.263 +    EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(0);
   1.264 +  }
   1.265 +
   1.266 +  int time = 0;
   1.267 +  int touchStart = 50;
   1.268 +  int touchEnd = 10;
   1.269 +  ScreenPoint pointOut;
   1.270 +  ViewTransform viewTransformOut;
   1.271 +
   1.272 +  nsTArray<uint32_t> allowedTouchBehaviors;
   1.273 +  allowedTouchBehaviors.AppendElement(aBehavior);
   1.274 +
   1.275 +  // Pan down
   1.276 +  ApzcPan(apzc, tm, time, touchStart, touchEnd, !aShouldTriggerScroll, false, &allowedTouchBehaviors);
   1.277 +  apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.278 +
   1.279 +  if (aShouldTriggerScroll) {
   1.280 +    EXPECT_EQ(ScreenPoint(0, -(touchEnd-touchStart)), pointOut);
   1.281 +    EXPECT_NE(ViewTransform(), viewTransformOut);
   1.282 +  } else {
   1.283 +    EXPECT_EQ(ScreenPoint(), pointOut);
   1.284 +    EXPECT_EQ(ViewTransform(), viewTransformOut);
   1.285 +  }
   1.286 +
   1.287 +  // Pan back
   1.288 +  ApzcPan(apzc, tm, time, touchEnd, touchStart, !aShouldTriggerScroll, false, &allowedTouchBehaviors);
   1.289 +  apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.290 +
   1.291 +  EXPECT_EQ(ScreenPoint(), pointOut);
   1.292 +  EXPECT_EQ(ViewTransform(), viewTransformOut);
   1.293 +
   1.294 +  apzc->Destroy();
   1.295 +}
   1.296 +
   1.297 +static void
   1.298 +ApzcPinch(AsyncPanZoomController* aApzc, int aFocusX, int aFocusY, float aScale) {
   1.299 +  aApzc->HandleGestureEvent(PinchGestureInput(PinchGestureInput::PINCHGESTURE_START,
   1.300 +                                            0,
   1.301 +                                            ScreenPoint(aFocusX, aFocusY),
   1.302 +                                            10.0,
   1.303 +                                            10.0,
   1.304 +                                            0));
   1.305 +  aApzc->HandleGestureEvent(PinchGestureInput(PinchGestureInput::PINCHGESTURE_SCALE,
   1.306 +                                            0,
   1.307 +                                            ScreenPoint(aFocusX, aFocusY),
   1.308 +                                            10.0 * aScale,
   1.309 +                                            10.0,
   1.310 +                                            0));
   1.311 +  aApzc->HandleGestureEvent(PinchGestureInput(PinchGestureInput::PINCHGESTURE_END,
   1.312 +                                            0,
   1.313 +                                            ScreenPoint(aFocusX, aFocusY),
   1.314 +                                            // note: negative values here tell APZC
   1.315 +                                            //       not to turn the pinch into a pan
   1.316 +                                            -1.0,
   1.317 +                                            -1.0,
   1.318 +                                            0));
   1.319 +}
   1.320 +
   1.321 +static nsEventStatus
   1.322 +ApzcDown(AsyncPanZoomController* apzc, int aX, int aY, int& aTime) {
   1.323 +  MultiTouchInput mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_START, aTime, 0);
   1.324 +  mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(aX, aY), ScreenSize(0, 0), 0, 0));
   1.325 +  return apzc->ReceiveInputEvent(mti);
   1.326 +}
   1.327 +
   1.328 +static nsEventStatus
   1.329 +ApzcUp(AsyncPanZoomController* apzc, int aX, int aY, int& aTime) {
   1.330 +  MultiTouchInput mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_END, aTime, 0);
   1.331 +  mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(aX, aY), ScreenSize(0, 0), 0, 0));
   1.332 +  return apzc->ReceiveInputEvent(mti);
   1.333 +}
   1.334 +
   1.335 +static nsEventStatus
   1.336 +ApzcTap(AsyncPanZoomController* apzc, int aX, int aY, int& aTime, int aTapLength, MockContentControllerDelayed* mcc = nullptr) {
   1.337 +  nsEventStatus status = ApzcDown(apzc, aX, aY, aTime);
   1.338 +  if (mcc != nullptr) {
   1.339 +    // There will be delayed tasks posted for the long-tap and MAX_TAP timeouts, but
   1.340 +    // if we were provided a non-null mcc we want to clear them.
   1.341 +    mcc->CheckHasDelayedTask();
   1.342 +    mcc->ClearDelayedTask();
   1.343 +    mcc->CheckHasDelayedTask();
   1.344 +    mcc->ClearDelayedTask();
   1.345 +  }
   1.346 +  EXPECT_EQ(nsEventStatus_eConsumeNoDefault, status);
   1.347 +  aTime += aTapLength;
   1.348 +  return ApzcUp(apzc, aX, aY, aTime);
   1.349 +}
   1.350 +
   1.351 +TEST_F(AsyncPanZoomControllerTester, Constructor) {
   1.352 +  // RefCounted class can't live in the stack
   1.353 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.354 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   1.355 +  apzc->SetFrameMetrics(TestFrameMetrics());
   1.356 +}
   1.357 +
   1.358 +TEST_F(AsyncPanZoomControllerTester, Pinch) {
   1.359 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.360 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   1.361 +
   1.362 +  FrameMetrics fm;
   1.363 +  fm.mViewport = CSSRect(0, 0, 980, 480);
   1.364 +  fm.mCompositionBounds = ParentLayerIntRect(200, 200, 100, 200);
   1.365 +  fm.mScrollableRect = CSSRect(0, 0, 980, 1000);
   1.366 +  fm.SetScrollOffset(CSSPoint(300, 300));
   1.367 +  fm.SetZoom(CSSToScreenScale(2.0));
   1.368 +  apzc->SetFrameMetrics(fm);
   1.369 +  apzc->UpdateZoomConstraints(ZoomConstraints(true, true, CSSToScreenScale(0.25), CSSToScreenScale(4.0)));
   1.370 +  // the visible area of the document in CSS pixels is x=300 y=300 w=50 h=100
   1.371 +
   1.372 +  EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   1.373 +  EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   1.374 +
   1.375 +  ApzcPinch(apzc, 250, 300, 1.25);
   1.376 +
   1.377 +  // the visible area of the document in CSS pixels is now x=305 y=310 w=40 h=80
   1.378 +  fm = apzc->GetFrameMetrics();
   1.379 +  EXPECT_EQ(2.5f, fm.GetZoom().scale);
   1.380 +  EXPECT_EQ(305, fm.GetScrollOffset().x);
   1.381 +  EXPECT_EQ(310, fm.GetScrollOffset().y);
   1.382 +
   1.383 +  // part 2 of the test, move to the top-right corner of the page and pinch and
   1.384 +  // make sure we stay in the correct spot
   1.385 +  fm.SetZoom(CSSToScreenScale(2.0));
   1.386 +  fm.SetScrollOffset(CSSPoint(930, 5));
   1.387 +  apzc->SetFrameMetrics(fm);
   1.388 +  // the visible area of the document in CSS pixels is x=930 y=5 w=50 h=100
   1.389 +
   1.390 +  ApzcPinch(apzc, 250, 300, 0.5);
   1.391 +
   1.392 +  // the visible area of the document in CSS pixels is now x=880 y=0 w=100 h=200
   1.393 +  fm = apzc->GetFrameMetrics();
   1.394 +  EXPECT_EQ(1.0f, fm.GetZoom().scale);
   1.395 +  EXPECT_EQ(880, fm.GetScrollOffset().x);
   1.396 +  EXPECT_EQ(0, fm.GetScrollOffset().y);
   1.397 +
   1.398 +  apzc->Destroy();
   1.399 +}
   1.400 +
   1.401 +TEST_F(AsyncPanZoomControllerTester, PinchWithTouchActionNone) {
   1.402 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.403 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   1.404 +
   1.405 +  FrameMetrics fm;
   1.406 +  fm.mViewport = CSSRect(0, 0, 980, 480);
   1.407 +  fm.mCompositionBounds = ParentLayerIntRect(200, 200, 100, 200);
   1.408 +  fm.mScrollableRect = CSSRect(0, 0, 980, 1000);
   1.409 +  fm.SetScrollOffset(CSSPoint(300, 300));
   1.410 +  fm.SetZoom(CSSToScreenScale(2.0));
   1.411 +  apzc->SetFrameMetrics(fm);
   1.412 +  // the visible area of the document in CSS pixels is x=300 y=300 w=50 h=100
   1.413 +
   1.414 +  // Apzc's OnScaleEnd method calls once SendAsyncScrollDOMEvent and RequestContentRepaint methods,
   1.415 +  // therefore we're setting these specific values.
   1.416 +  EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtMost(1));
   1.417 +  EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(AtMost(1));
   1.418 +
   1.419 +  nsTArray<uint32_t> values;
   1.420 +  values.AppendElement(mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN);
   1.421 +  values.AppendElement(mozilla::layers::AllowedTouchBehavior::PINCH_ZOOM);
   1.422 +  apzc->SetTouchActionEnabled(true);
   1.423 +
   1.424 +  apzc->SetAllowedTouchBehavior(values);
   1.425 +  ApzcPinch(apzc, 250, 300, 1.25);
   1.426 +
   1.427 +  // The frame metrics should stay the same since touch-action:none makes
   1.428 +  // apzc ignore pinch gestures.
   1.429 +  fm = apzc->GetFrameMetrics();
   1.430 +  EXPECT_EQ(2.0f, fm.GetZoom().scale);
   1.431 +  EXPECT_EQ(300, fm.GetScrollOffset().x);
   1.432 +  EXPECT_EQ(300, fm.GetScrollOffset().y);
   1.433 +}
   1.434 +
   1.435 +TEST_F(AsyncPanZoomControllerTester, Overzoom) {
   1.436 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.437 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   1.438 +
   1.439 +  FrameMetrics fm;
   1.440 +  fm.mViewport = CSSRect(0, 0, 100, 100);
   1.441 +  fm.mCompositionBounds = ParentLayerIntRect(0, 0, 100, 100);
   1.442 +  fm.mScrollableRect = CSSRect(0, 0, 125, 150);
   1.443 +  fm.SetScrollOffset(CSSPoint(10, 0));
   1.444 +  fm.SetZoom(CSSToScreenScale(1.0));
   1.445 +  apzc->SetFrameMetrics(fm);
   1.446 +  apzc->UpdateZoomConstraints(ZoomConstraints(true, true, CSSToScreenScale(0.25), CSSToScreenScale(4.0)));
   1.447 +  // the visible area of the document in CSS pixels is x=10 y=0 w=100 h=100
   1.448 +
   1.449 +  EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   1.450 +  EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   1.451 +
   1.452 +  ApzcPinch(apzc, 50, 50, 0.5);
   1.453 +
   1.454 +  fm = apzc->GetFrameMetrics();
   1.455 +  EXPECT_EQ(0.8f, fm.GetZoom().scale);
   1.456 +  // bug 936721 - PGO builds introduce rounding error so
   1.457 +  // use a fuzzy match instead
   1.458 +  EXPECT_LT(abs(fm.GetScrollOffset().x), 1e-5);
   1.459 +  EXPECT_LT(abs(fm.GetScrollOffset().y), 1e-5);
   1.460 +}
   1.461 +
   1.462 +TEST_F(AsyncPanZoomControllerTester, SimpleTransform) {
   1.463 +  TimeStamp testStartTime = TimeStamp::Now();
   1.464 +  // RefCounted class can't live in the stack
   1.465 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.466 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   1.467 +  apzc->SetFrameMetrics(TestFrameMetrics());
   1.468 +
   1.469 +  ScreenPoint pointOut;
   1.470 +  ViewTransform viewTransformOut;
   1.471 +  apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.472 +
   1.473 +  EXPECT_EQ(ScreenPoint(), pointOut);
   1.474 +  EXPECT_EQ(ViewTransform(), viewTransformOut);
   1.475 +}
   1.476 +
   1.477 +
   1.478 +TEST_F(AsyncPanZoomControllerTester, ComplexTransform) {
   1.479 +  TimeStamp testStartTime = TimeStamp::Now();
   1.480 +  AsyncPanZoomController::SetFrameTime(testStartTime);
   1.481 +
   1.482 +  // This test assumes there is a page that gets rendered to
   1.483 +  // two layers. In CSS pixels, the first layer is 50x50 and
   1.484 +  // the second layer is 25x50. The widget scale factor is 3.0
   1.485 +  // and the presShell resolution is 2.0. Therefore, these layers
   1.486 +  // end up being 300x300 and 150x300 in layer pixels.
   1.487 +  //
   1.488 +  // The second (child) layer has an additional CSS transform that
   1.489 +  // stretches it by 2.0 on the x-axis. Therefore, after applying
   1.490 +  // CSS transforms, the two layers are the same size in screen
   1.491 +  // pixels.
   1.492 +  //
   1.493 +  // The screen itself is 24x24 in screen pixels (therefore 4x4 in
   1.494 +  // CSS pixels). The displayport is 1 extra CSS pixel on all
   1.495 +  // sides.
   1.496 +
   1.497 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.498 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   1.499 +  nsRefPtr<TestAsyncPanZoomController> childApzc = new TestAsyncPanZoomController(0, mcc);
   1.500 +
   1.501 +  const char* layerTreeSyntax = "c(c)";
   1.502 +  // LayerID                     0 1
   1.503 +  nsIntRegion layerVisibleRegion[] = {
   1.504 +    nsIntRegion(nsIntRect(0, 0, 300, 300)),
   1.505 +    nsIntRegion(nsIntRect(0, 0, 150, 300)),
   1.506 +  };
   1.507 +  gfx3DMatrix transforms[] = {
   1.508 +    gfx3DMatrix(),
   1.509 +    gfx3DMatrix(),
   1.510 +  };
   1.511 +  transforms[0].ScalePost(0.5f, 0.5f, 1.0f); // this results from the 2.0 resolution on the root layer
   1.512 +  transforms[1].ScalePost(2.0f, 1.0f, 1.0f); // this is the 2.0 x-axis CSS transform on the child layer
   1.513 +
   1.514 +  nsTArray<nsRefPtr<Layer> > layers;
   1.515 +  nsRefPtr<LayerManager> lm;
   1.516 +  nsRefPtr<Layer> root = CreateLayerTree(layerTreeSyntax, layerVisibleRegion, transforms, lm, layers);
   1.517 +
   1.518 +  FrameMetrics metrics;
   1.519 +  metrics.mCompositionBounds = ParentLayerIntRect(0, 0, 24, 24);
   1.520 +  metrics.mDisplayPort = CSSRect(-1, -1, 6, 6);
   1.521 +  metrics.mViewport = CSSRect(0, 0, 4, 4);
   1.522 +  metrics.SetScrollOffset(CSSPoint(10, 10));
   1.523 +  metrics.mScrollableRect = CSSRect(0, 0, 50, 50);
   1.524 +  metrics.mCumulativeResolution = LayoutDeviceToLayerScale(2);
   1.525 +  metrics.mResolution = ParentLayerToLayerScale(2);
   1.526 +  metrics.SetZoom(CSSToScreenScale(6));
   1.527 +  metrics.mDevPixelsPerCSSPixel = CSSToLayoutDeviceScale(3);
   1.528 +  metrics.SetScrollId(FrameMetrics::START_SCROLL_ID);
   1.529 +
   1.530 +  FrameMetrics childMetrics = metrics;
   1.531 +  childMetrics.SetScrollId(FrameMetrics::START_SCROLL_ID + 1);
   1.532 +
   1.533 +  layers[0]->AsContainerLayer()->SetFrameMetrics(metrics);
   1.534 +  layers[1]->AsContainerLayer()->SetFrameMetrics(childMetrics);
   1.535 +
   1.536 +  ScreenPoint pointOut;
   1.537 +  ViewTransform viewTransformOut;
   1.538 +
   1.539 +  // Both the parent and child layer should behave exactly the same here, because
   1.540 +  // the CSS transform on the child layer does not affect the SampleContentTransformForFrame code
   1.541 +
   1.542 +  // initial transform
   1.543 +  apzc->SetFrameMetrics(metrics);
   1.544 +  apzc->NotifyLayersUpdated(metrics, true);
   1.545 +  apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.546 +  EXPECT_EQ(ViewTransform(LayerPoint(), ParentLayerToScreenScale(2)), viewTransformOut);
   1.547 +  EXPECT_EQ(ScreenPoint(60, 60), pointOut);
   1.548 +
   1.549 +  childApzc->SetFrameMetrics(childMetrics);
   1.550 +  childApzc->NotifyLayersUpdated(childMetrics, true);
   1.551 +  childApzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.552 +  EXPECT_EQ(ViewTransform(LayerPoint(), ParentLayerToScreenScale(2)), viewTransformOut);
   1.553 +  EXPECT_EQ(ScreenPoint(60, 60), pointOut);
   1.554 +
   1.555 +  // do an async scroll by 5 pixels and check the transform
   1.556 +  metrics.ScrollBy(CSSPoint(5, 0));
   1.557 +  apzc->SetFrameMetrics(metrics);
   1.558 +  apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.559 +  EXPECT_EQ(ViewTransform(LayerPoint(-30, 0), ParentLayerToScreenScale(2)), viewTransformOut);
   1.560 +  EXPECT_EQ(ScreenPoint(90, 60), pointOut);
   1.561 +
   1.562 +  childMetrics.ScrollBy(CSSPoint(5, 0));
   1.563 +  childApzc->SetFrameMetrics(childMetrics);
   1.564 +  childApzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.565 +  EXPECT_EQ(ViewTransform(LayerPoint(-30, 0), ParentLayerToScreenScale(2)), viewTransformOut);
   1.566 +  EXPECT_EQ(ScreenPoint(90, 60), pointOut);
   1.567 +
   1.568 +  // do an async zoom of 1.5x and check the transform
   1.569 +  metrics.ZoomBy(1.5f);
   1.570 +  apzc->SetFrameMetrics(metrics);
   1.571 +  apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.572 +  EXPECT_EQ(ViewTransform(LayerPoint(-30, 0), ParentLayerToScreenScale(3)), viewTransformOut);
   1.573 +  EXPECT_EQ(ScreenPoint(135, 90), pointOut);
   1.574 +
   1.575 +  childMetrics.ZoomBy(1.5f);
   1.576 +  childApzc->SetFrameMetrics(childMetrics);
   1.577 +  childApzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.578 +  EXPECT_EQ(ViewTransform(LayerPoint(-30, 0), ParentLayerToScreenScale(3)), viewTransformOut);
   1.579 +  EXPECT_EQ(ScreenPoint(135, 90), pointOut);
   1.580 +}
   1.581 +
   1.582 +TEST_F(AsyncPanZoomControllerTester, Pan) {
   1.583 +  DoPanTest(true, false, mozilla::layers::AllowedTouchBehavior::NONE);
   1.584 +}
   1.585 +
   1.586 +// In the each of the following 4 pan tests we are performing two pan gestures: vertical pan from top
   1.587 +// to bottom and back - from bottom to top.
   1.588 +// According to the pointer-events/touch-action spec AUTO and PAN_Y touch-action values allow vertical
   1.589 +// scrolling while NONE and PAN_X forbid it. The first parameter of DoPanTest method specifies this
   1.590 +// behavior.
   1.591 +TEST_F(AsyncPanZoomControllerTester, PanWithTouchActionAuto) {
   1.592 +  DoPanTest(true, true,
   1.593 +            mozilla::layers::AllowedTouchBehavior::HORIZONTAL_PAN | mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN);
   1.594 +}
   1.595 +
   1.596 +TEST_F(AsyncPanZoomControllerTester, PanWithTouchActionNone) {
   1.597 +  DoPanTest(false, true, 0);
   1.598 +}
   1.599 +
   1.600 +TEST_F(AsyncPanZoomControllerTester, PanWithTouchActionPanX) {
   1.601 +  DoPanTest(false, true, mozilla::layers::AllowedTouchBehavior::HORIZONTAL_PAN);
   1.602 +}
   1.603 +
   1.604 +TEST_F(AsyncPanZoomControllerTester, PanWithTouchActionPanY) {
   1.605 +  DoPanTest(true, true, mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN);
   1.606 +}
   1.607 +
   1.608 +TEST_F(AsyncPanZoomControllerTester, PanWithPreventDefault) {
   1.609 +  TimeStamp testStartTime = TimeStamp::Now();
   1.610 +  AsyncPanZoomController::SetFrameTime(testStartTime);
   1.611 +
   1.612 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.613 +  nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   1.614 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc, tm);
   1.615 +
   1.616 +  FrameMetrics frameMetrics(TestFrameMetrics());
   1.617 +  frameMetrics.mMayHaveTouchListeners = true;
   1.618 +
   1.619 +  apzc->SetFrameMetrics(frameMetrics);
   1.620 +  apzc->NotifyLayersUpdated(frameMetrics, true);
   1.621 +
   1.622 +  int time = 0;
   1.623 +  int touchStart = 50;
   1.624 +  int touchEnd = 10;
   1.625 +  ScreenPoint pointOut;
   1.626 +  ViewTransform viewTransformOut;
   1.627 +
   1.628 +  // Pan down
   1.629 +  nsTArray<uint32_t> allowedTouchBehaviors;
   1.630 +  allowedTouchBehaviors.AppendElement(mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN);
   1.631 +  apzc->SetTouchActionEnabled(true);
   1.632 +  ApzcPan(apzc, tm, time, touchStart, touchEnd, true, true, &allowedTouchBehaviors);
   1.633 +
   1.634 +  // Send the signal that content has handled and preventDefaulted the touch
   1.635 +  // events. This flushes the event queue.
   1.636 +  apzc->ContentReceivedTouch(true);
   1.637 +
   1.638 +  apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.639 +  EXPECT_EQ(ScreenPoint(), pointOut);
   1.640 +  EXPECT_EQ(ViewTransform(), viewTransformOut);
   1.641 +
   1.642 +  apzc->Destroy();
   1.643 +}
   1.644 +
   1.645 +TEST_F(AsyncPanZoomControllerTester, Fling) {
   1.646 +  TimeStamp testStartTime = TimeStamp::Now();
   1.647 +  AsyncPanZoomController::SetFrameTime(testStartTime);
   1.648 +
   1.649 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.650 +  nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   1.651 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc, tm);
   1.652 +
   1.653 +  apzc->SetFrameMetrics(TestFrameMetrics());
   1.654 +  apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   1.655 +
   1.656 +  EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   1.657 +  EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   1.658 +
   1.659 +  int time = 0;
   1.660 +  int touchStart = 50;
   1.661 +  int touchEnd = 10;
   1.662 +  ScreenPoint pointOut;
   1.663 +  ViewTransform viewTransformOut;
   1.664 +
   1.665 +  // Fling down. Each step scroll further down
   1.666 +  ApzcPan(apzc, tm, time, touchStart, touchEnd);
   1.667 +  ScreenPoint lastPoint;
   1.668 +  for (int i = 1; i < 50; i+=1) {
   1.669 +    apzc->SampleContentTransformForFrame(testStartTime+TimeDuration::FromMilliseconds(i), &viewTransformOut, pointOut);
   1.670 +    EXPECT_GT(pointOut.y, lastPoint.y);
   1.671 +    lastPoint = pointOut;
   1.672 +  }
   1.673 +}
   1.674 +
   1.675 +TEST_F(AsyncPanZoomControllerTester, OverScrollPanning) {
   1.676 +  TimeStamp testStartTime = TimeStamp::Now();
   1.677 +  AsyncPanZoomController::SetFrameTime(testStartTime);
   1.678 +
   1.679 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   1.680 +  nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   1.681 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc, tm);
   1.682 +
   1.683 +  apzc->SetFrameMetrics(TestFrameMetrics());
   1.684 +  apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   1.685 +
   1.686 +  EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   1.687 +  EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   1.688 +
   1.689 +  // Pan sufficiently to hit overscroll behavior
   1.690 +  int time = 0;
   1.691 +  int touchStart = 500;
   1.692 +  int touchEnd = 10;
   1.693 +  ScreenPoint pointOut;
   1.694 +  ViewTransform viewTransformOut;
   1.695 +
   1.696 +  // Pan down
   1.697 +  ApzcPan(apzc, tm, time, touchStart, touchEnd);
   1.698 +  apzc->SampleContentTransformForFrame(testStartTime+TimeDuration::FromMilliseconds(1000), &viewTransformOut, pointOut);
   1.699 +  EXPECT_EQ(ScreenPoint(0, 90), pointOut);
   1.700 +}
   1.701 +
   1.702 +TEST_F(AsyncPanZoomControllerTester, ShortPress) {
   1.703 +  nsRefPtr<MockContentControllerDelayed> mcc = new NiceMock<MockContentControllerDelayed>();
   1.704 +  nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   1.705 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(
   1.706 +    0, mcc, tm, AsyncPanZoomController::USE_GESTURE_DETECTOR);
   1.707 +
   1.708 +  apzc->SetFrameMetrics(TestFrameMetrics());
   1.709 +  apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   1.710 +  apzc->UpdateZoomConstraints(ZoomConstraints(false, false, CSSToScreenScale(1.0), CSSToScreenScale(1.0)));
   1.711 +
   1.712 +  int time = 0;
   1.713 +  nsEventStatus status = ApzcTap(apzc, 10, 10, time, 100, mcc.get());
   1.714 +  EXPECT_EQ(nsEventStatus_eIgnore, status);
   1.715 +
   1.716 +  // This verifies that the single tap notification is sent after the
   1.717 +  // touchdown is fully processed. The ordering here is important.
   1.718 +  mcc->CheckHasDelayedTask();
   1.719 +
   1.720 +  EXPECT_CALL(*mcc, HandleSingleTap(CSSPoint(10, 10), 0, apzc->GetGuid())).Times(1);
   1.721 +  mcc->RunDelayedTask();
   1.722 +
   1.723 +  apzc->Destroy();
   1.724 +}
   1.725 +
   1.726 +TEST_F(AsyncPanZoomControllerTester, MediumPress) {
   1.727 +  nsRefPtr<MockContentControllerDelayed> mcc = new NiceMock<MockContentControllerDelayed>();
   1.728 +  nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   1.729 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(
   1.730 +    0, mcc, tm, AsyncPanZoomController::USE_GESTURE_DETECTOR);
   1.731 +
   1.732 +  apzc->SetFrameMetrics(TestFrameMetrics());
   1.733 +  apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   1.734 +  apzc->UpdateZoomConstraints(ZoomConstraints(false, false, CSSToScreenScale(1.0), CSSToScreenScale(1.0)));
   1.735 +
   1.736 +  int time = 0;
   1.737 +  nsEventStatus status = ApzcTap(apzc, 10, 10, time, 400, mcc.get());
   1.738 +  EXPECT_EQ(nsEventStatus_eIgnore, status);
   1.739 +
   1.740 +  // This verifies that the single tap notification is sent after the
   1.741 +  // touchdown is fully processed. The ordering here is important.
   1.742 +  mcc->CheckHasDelayedTask();
   1.743 +
   1.744 +  EXPECT_CALL(*mcc, HandleSingleTap(CSSPoint(10, 10), 0, apzc->GetGuid())).Times(1);
   1.745 +  mcc->RunDelayedTask();
   1.746 +
   1.747 +  apzc->Destroy();
   1.748 +}
   1.749 +
   1.750 +void
   1.751 +DoLongPressTest(bool aShouldUseTouchAction, uint32_t aBehavior) {
   1.752 +  nsRefPtr<MockContentControllerDelayed> mcc = new MockContentControllerDelayed();
   1.753 +  nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   1.754 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(
   1.755 +    0, mcc, tm, AsyncPanZoomController::USE_GESTURE_DETECTOR);
   1.756 +
   1.757 +  apzc->SetFrameMetrics(TestFrameMetrics());
   1.758 +  apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   1.759 +  apzc->UpdateZoomConstraints(ZoomConstraints(false, false, CSSToScreenScale(1.0), CSSToScreenScale(1.0)));
   1.760 +
   1.761 +  apzc->SetTouchActionEnabled(aShouldUseTouchAction);
   1.762 +
   1.763 +  int time = 0;
   1.764 +
   1.765 +  nsEventStatus status = ApzcDown(apzc, 10, 10, time);
   1.766 +  EXPECT_EQ(nsEventStatus_eConsumeNoDefault, status);
   1.767 +
   1.768 +  // SetAllowedTouchBehavior() must be called after sending touch-start.
   1.769 +  nsTArray<uint32_t> allowedTouchBehaviors;
   1.770 +  allowedTouchBehaviors.AppendElement(aBehavior);
   1.771 +  apzc->SetAllowedTouchBehavior(allowedTouchBehaviors);
   1.772 +
   1.773 +  MockFunction<void(std::string checkPointName)> check;
   1.774 +
   1.775 +  {
   1.776 +    InSequence s;
   1.777 +
   1.778 +    EXPECT_CALL(check, Call("preHandleLongTap"));
   1.779 +    EXPECT_CALL(*mcc, HandleLongTap(CSSPoint(10, 10), 0, apzc->GetGuid())).Times(1);
   1.780 +    EXPECT_CALL(check, Call("postHandleLongTap"));
   1.781 +
   1.782 +    EXPECT_CALL(check, Call("preHandleLongTapUp"));
   1.783 +    EXPECT_CALL(*mcc, HandleLongTapUp(CSSPoint(10, 10), 0, apzc->GetGuid())).Times(1);
   1.784 +    EXPECT_CALL(check, Call("postHandleLongTapUp"));
   1.785 +  }
   1.786 +
   1.787 +  mcc->CheckHasDelayedTask();
   1.788 +
   1.789 +  // Manually invoke the longpress while the touch is currently down.
   1.790 +  check.Call("preHandleLongTap");
   1.791 +  mcc->RunDelayedTask();
   1.792 +  check.Call("postHandleLongTap");
   1.793 +
   1.794 +  // Destroy pending MAX_TAP timeout task
   1.795 +  mcc->DestroyOldestTask();
   1.796 +  // There should be a TimeoutContentResponse task in the queue still
   1.797 +  // Clear the waiting-for-content timeout task, then send the signal that
   1.798 +  // content has handled this long tap. This takes the place of the
   1.799 +  // "contextmenu" event.
   1.800 +  mcc->CheckHasDelayedTask();
   1.801 +  mcc->ClearDelayedTask();
   1.802 +  apzc->ContentReceivedTouch(true);
   1.803 +
   1.804 +  time += 1000;
   1.805 +
   1.806 +  status = ApzcUp(apzc, 10, 10, time);
   1.807 +  EXPECT_EQ(nsEventStatus_eIgnore, status);
   1.808 +
   1.809 +  // To get a LongTapUp event, we must kick APZC to flush its event queue. This
   1.810 +  // would normally happen if we had a (Tab|RenderFrame)(Parent|Child)
   1.811 +  // mechanism.
   1.812 +  check.Call("preHandleLongTapUp");
   1.813 +  apzc->ContentReceivedTouch(false);
   1.814 +  check.Call("postHandleLongTapUp");
   1.815 +
   1.816 +  apzc->Destroy();
   1.817 +}
   1.818 +
   1.819 +void
   1.820 +DoLongPressPreventDefaultTest(bool aShouldUseTouchAction, uint32_t aBehavior) {
   1.821 +  // We have to initialize both an integer time and TimeStamp time because
   1.822 +  // TimeStamp doesn't have any ToXXX() functions for converting back to
   1.823 +  // primitives.
   1.824 +  TimeStamp testStartTime = TimeStamp::Now();
   1.825 +  int time = 0;
   1.826 +  AsyncPanZoomController::SetFrameTime(testStartTime);
   1.827 +
   1.828 +  nsRefPtr<MockContentControllerDelayed> mcc = new MockContentControllerDelayed();
   1.829 +  nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   1.830 +  nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(
   1.831 +    0, mcc, tm, AsyncPanZoomController::USE_GESTURE_DETECTOR);
   1.832 +
   1.833 +  apzc->SetFrameMetrics(TestFrameMetrics());
   1.834 +  apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   1.835 +  apzc->UpdateZoomConstraints(ZoomConstraints(false, false, CSSToScreenScale(1.0), CSSToScreenScale(1.0)));
   1.836 +
   1.837 +  apzc->SetTouchActionEnabled(aShouldUseTouchAction);
   1.838 +
   1.839 +  EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(0);
   1.840 +  EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(0);
   1.841 +
   1.842 +  int touchX = 10,
   1.843 +      touchStartY = 10,
   1.844 +      touchEndY = 50;
   1.845 +
   1.846 +  nsEventStatus status = ApzcDown(apzc, touchX, touchStartY, time);
   1.847 +  EXPECT_EQ(nsEventStatus_eConsumeNoDefault, status);
   1.848 +
   1.849 +  // SetAllowedTouchBehavior() must be called after sending touch-start.
   1.850 +  nsTArray<uint32_t> allowedTouchBehaviors;
   1.851 +  allowedTouchBehaviors.AppendElement(aBehavior);
   1.852 +  apzc->SetAllowedTouchBehavior(allowedTouchBehaviors);
   1.853 +
   1.854 +  MockFunction<void(std::string checkPointName)> check;
   1.855 +
   1.856 +  {
   1.857 +    InSequence s;
   1.858 +
   1.859 +    EXPECT_CALL(check, Call("preHandleLongTap"));
   1.860 +    EXPECT_CALL(*mcc, HandleLongTap(CSSPoint(touchX, touchStartY), 0, apzc->GetGuid())).Times(1);
   1.861 +    EXPECT_CALL(check, Call("postHandleLongTap"));
   1.862 +  }
   1.863 +
   1.864 +  mcc->CheckHasDelayedTask();
   1.865 +
   1.866 +  // Manually invoke the longpress while the touch is currently down.
   1.867 +  check.Call("preHandleLongTap");
   1.868 +  mcc->RunDelayedTask();
   1.869 +  check.Call("postHandleLongTap");
   1.870 +
   1.871 +  // Destroy pending MAX_TAP timeout task
   1.872 +  mcc->DestroyOldestTask();
   1.873 +  // Clear the waiting-for-content timeout task, then send the signal that
   1.874 +  // content has handled this long tap. This takes the place of the
   1.875 +  // "contextmenu" event.
   1.876 +  mcc->ClearDelayedTask();
   1.877 +  apzc->ContentReceivedTouch(true);
   1.878 +
   1.879 +  time += 1000;
   1.880 +
   1.881 +  MultiTouchInput mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, time, 0);
   1.882 +  mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(touchX, touchEndY), ScreenSize(0, 0), 0, 0));
   1.883 +  status = apzc->ReceiveInputEvent(mti);
   1.884 +  EXPECT_EQ(nsEventStatus_eIgnore, status);
   1.885 +
   1.886 +  EXPECT_CALL(*mcc, HandleLongTapUp(CSSPoint(touchX, touchEndY), 0, apzc->GetGuid())).Times(1);
   1.887 +  status = ApzcUp(apzc, touchX, touchEndY, time);
   1.888 +  EXPECT_EQ(nsEventStatus_eIgnore, status);
   1.889 +
   1.890 +  // Flush the event queue. Once the "contextmenu" event is handled, any touch
   1.891 +  // events that come from the same series of start->n*move->end events should
   1.892 +  // be discarded, even if only the "contextmenu" event is preventDefaulted.
   1.893 +  apzc->ContentReceivedTouch(false);
   1.894 +
   1.895 +  ScreenPoint pointOut;
   1.896 +  ViewTransform viewTransformOut;
   1.897 +  apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   1.898 +
   1.899 +  EXPECT_EQ(ScreenPoint(), pointOut);
   1.900 +  EXPECT_EQ(ViewTransform(), viewTransformOut);
   1.901 +
   1.902 +  apzc->Destroy();
   1.903 +}
   1.904 +
   1.905 +TEST_F(AsyncPanZoomControllerTester, LongPress) {
   1.906 +  DoLongPressTest(false, mozilla::layers::AllowedTouchBehavior::NONE);
   1.907 +}
   1.908 +
   1.909 +TEST_F(AsyncPanZoomControllerTester, LongPressWithTouchAction) {
   1.910 +  DoLongPressTest(true, mozilla::layers::AllowedTouchBehavior::HORIZONTAL_PAN
   1.911 +                      | mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN
   1.912 +                      | mozilla::layers::AllowedTouchBehavior::PINCH_ZOOM);
   1.913 +}
   1.914 +
   1.915 +TEST_F(AsyncPanZoomControllerTester, LongPressPreventDefault) {
   1.916 +  DoLongPressPreventDefaultTest(false, mozilla::layers::AllowedTouchBehavior::NONE);
   1.917 +}
   1.918 +
   1.919 +TEST_F(AsyncPanZoomControllerTester, LongPressPreventDefaultWithTouchAction) {
   1.920 +  DoLongPressPreventDefaultTest(true, mozilla::layers::AllowedTouchBehavior::HORIZONTAL_PAN
   1.921 +                                    | mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN
   1.922 +                                    | mozilla::layers::AllowedTouchBehavior::PINCH_ZOOM);
   1.923 +}
   1.924 +
   1.925 +// Layer tree for HitTesting1
   1.926 +static already_AddRefed<mozilla::layers::Layer>
   1.927 +CreateTestLayerTree1(nsRefPtr<LayerManager>& aLayerManager, nsTArray<nsRefPtr<Layer> >& aLayers) {
   1.928 +  const char* layerTreeSyntax = "c(ttcc)";
   1.929 +  // LayerID                     0 1234
   1.930 +  nsIntRegion layerVisibleRegion[] = {
   1.931 +    nsIntRegion(nsIntRect(0,0,100,100)),
   1.932 +    nsIntRegion(nsIntRect(0,0,100,100)),
   1.933 +    nsIntRegion(nsIntRect(10,10,20,20)),
   1.934 +    nsIntRegion(nsIntRect(10,10,20,20)),
   1.935 +    nsIntRegion(nsIntRect(5,5,20,20)),
   1.936 +  };
   1.937 +  gfx3DMatrix transforms[] = {
   1.938 +    gfx3DMatrix(),
   1.939 +    gfx3DMatrix(),
   1.940 +    gfx3DMatrix(),
   1.941 +    gfx3DMatrix(),
   1.942 +    gfx3DMatrix(),
   1.943 +  };
   1.944 +  return CreateLayerTree(layerTreeSyntax, layerVisibleRegion, transforms, aLayerManager, aLayers);
   1.945 +}
   1.946 +
   1.947 +// Layer Tree for HitTesting2
   1.948 +static already_AddRefed<mozilla::layers::Layer>
   1.949 +CreateTestLayerTree2(nsRefPtr<LayerManager>& aLayerManager, nsTArray<nsRefPtr<Layer> >& aLayers) {
   1.950 +  const char* layerTreeSyntax = "c(cc(c))";
   1.951 +  // LayerID                     0 12 3
   1.952 +  nsIntRegion layerVisibleRegion[] = {
   1.953 +    nsIntRegion(nsIntRect(0,0,100,100)),
   1.954 +    nsIntRegion(nsIntRect(10,10,40,40)),
   1.955 +    nsIntRegion(nsIntRect(10,60,40,40)),
   1.956 +    nsIntRegion(nsIntRect(10,60,40,40)),
   1.957 +  };
   1.958 +  gfx3DMatrix transforms[] = {
   1.959 +    gfx3DMatrix(),
   1.960 +    gfx3DMatrix(),
   1.961 +    gfx3DMatrix(),
   1.962 +    gfx3DMatrix(),
   1.963 +  };
   1.964 +  return CreateLayerTree(layerTreeSyntax, layerVisibleRegion, transforms, aLayerManager, aLayers);
   1.965 +}
   1.966 +
   1.967 +static void
   1.968 +SetScrollableFrameMetrics(Layer* aLayer, FrameMetrics::ViewID aScrollId,
   1.969 +                          // The scrollable rect is only used in HitTesting2,
   1.970 +                          // HitTesting1 doesn't care about it.
   1.971 +                          CSSRect aScrollableRect = CSSRect(-1, -1, -1, -1))
   1.972 +{
   1.973 +  ContainerLayer* container = aLayer->AsContainerLayer();
   1.974 +  FrameMetrics metrics;
   1.975 +  metrics.SetScrollId(aScrollId);
   1.976 +  nsIntRect layerBound = aLayer->GetVisibleRegion().GetBounds();
   1.977 +  metrics.mCompositionBounds = ParentLayerIntRect(layerBound.x, layerBound.y,
   1.978 +                                                  layerBound.width, layerBound.height);
   1.979 +  metrics.mScrollableRect = aScrollableRect;
   1.980 +  metrics.SetScrollOffset(CSSPoint(0, 0));
   1.981 +  container->SetFrameMetrics(metrics);
   1.982 +}
   1.983 +
   1.984 +static already_AddRefed<AsyncPanZoomController>
   1.985 +GetTargetAPZC(APZCTreeManager* manager, const ScreenPoint& aPoint,
   1.986 +              gfx3DMatrix& aTransformToApzcOut, gfx3DMatrix& aTransformToGeckoOut)
   1.987 +{
   1.988 +  nsRefPtr<AsyncPanZoomController> hit = manager->GetTargetAPZC(aPoint);
   1.989 +  if (hit) {
   1.990 +    manager->GetInputTransforms(hit.get(), aTransformToApzcOut, aTransformToGeckoOut);
   1.991 +  }
   1.992 +  return hit.forget();
   1.993 +}
   1.994 +
   1.995 +// A simple hit testing test that doesn't involve any transforms on layers.
   1.996 +TEST_F(APZCTreeManagerTester, HitTesting1) {
   1.997 +  nsTArray<nsRefPtr<Layer> > layers;
   1.998 +  nsRefPtr<LayerManager> lm;
   1.999 +  nsRefPtr<Layer> root = CreateTestLayerTree1(lm, layers);
  1.1000 +
  1.1001 +  TimeStamp testStartTime = TimeStamp::Now();
  1.1002 +  AsyncPanZoomController::SetFrameTime(testStartTime);
  1.1003 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
  1.1004 +  ScopedLayerTreeRegistration controller(0, root, mcc);
  1.1005 +
  1.1006 +  nsRefPtr<APZCTreeManager> manager = new TestAPZCTreeManager();
  1.1007 +  gfx3DMatrix transformToApzc;
  1.1008 +  gfx3DMatrix transformToGecko;
  1.1009 +
  1.1010 +  // No APZC attached so hit testing will return no APZC at (20,20)
  1.1011 +  nsRefPtr<AsyncPanZoomController> hit = GetTargetAPZC(manager, ScreenPoint(20, 20), transformToApzc, transformToGecko);
  1.1012 +  AsyncPanZoomController* nullAPZC = nullptr;
  1.1013 +  EXPECT_EQ(nullAPZC, hit.get());
  1.1014 +  EXPECT_EQ(gfx3DMatrix(), transformToApzc);
  1.1015 +  EXPECT_EQ(gfx3DMatrix(), transformToGecko);
  1.1016 +
  1.1017 +  // Now we have a root APZC that will match the page
  1.1018 +  SetScrollableFrameMetrics(root, FrameMetrics::START_SCROLL_ID);
  1.1019 +  manager->UpdatePanZoomControllerTree(nullptr, root, false, 0);
  1.1020 +  hit = GetTargetAPZC(manager, ScreenPoint(15, 15), transformToApzc, transformToGecko);
  1.1021 +  EXPECT_EQ(root->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
  1.1022 +  // expect hit point at LayerIntPoint(15, 15)
  1.1023 +  EXPECT_EQ(gfxPoint(15, 15), transformToApzc.Transform(gfxPoint(15, 15)));
  1.1024 +  EXPECT_EQ(gfxPoint(15, 15), transformToGecko.Transform(gfxPoint(15, 15)));
  1.1025 +
  1.1026 +  // Now we have a sub APZC with a better fit
  1.1027 +  SetScrollableFrameMetrics(layers[3], FrameMetrics::START_SCROLL_ID + 1);
  1.1028 +  manager->UpdatePanZoomControllerTree(nullptr, root, false, 0);
  1.1029 +  EXPECT_NE(root->AsContainerLayer()->GetAsyncPanZoomController(), layers[3]->AsContainerLayer()->GetAsyncPanZoomController());
  1.1030 +  hit = GetTargetAPZC(manager, ScreenPoint(15, 15), transformToApzc, transformToGecko);
  1.1031 +  EXPECT_EQ(layers[3]->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
  1.1032 +  // expect hit point at LayerIntPoint(15, 15)
  1.1033 +  EXPECT_EQ(gfxPoint(15, 15), transformToApzc.Transform(gfxPoint(15, 15)));
  1.1034 +  EXPECT_EQ(gfxPoint(15, 15), transformToGecko.Transform(gfxPoint(15, 15)));
  1.1035 +
  1.1036 +  // Now test hit testing when we have two scrollable layers
  1.1037 +  hit = GetTargetAPZC(manager, ScreenPoint(15, 15), transformToApzc, transformToGecko);
  1.1038 +  EXPECT_EQ(layers[3]->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
  1.1039 +  SetScrollableFrameMetrics(layers[4], FrameMetrics::START_SCROLL_ID + 2);
  1.1040 +  manager->UpdatePanZoomControllerTree(nullptr, root, false, 0);
  1.1041 +  hit = GetTargetAPZC(manager, ScreenPoint(15, 15), transformToApzc, transformToGecko);
  1.1042 +  EXPECT_EQ(layers[4]->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
  1.1043 +  // expect hit point at LayerIntPoint(15, 15)
  1.1044 +  EXPECT_EQ(gfxPoint(15, 15), transformToApzc.Transform(gfxPoint(15, 15)));
  1.1045 +  EXPECT_EQ(gfxPoint(15, 15), transformToGecko.Transform(gfxPoint(15, 15)));
  1.1046 +
  1.1047 +  // Hit test ouside the reach of layer[3,4] but inside root
  1.1048 +  hit = GetTargetAPZC(manager, ScreenPoint(90, 90), transformToApzc, transformToGecko);
  1.1049 +  EXPECT_EQ(root->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
  1.1050 +  // expect hit point at LayerIntPoint(90, 90)
  1.1051 +  EXPECT_EQ(gfxPoint(90, 90), transformToApzc.Transform(gfxPoint(90, 90)));
  1.1052 +  EXPECT_EQ(gfxPoint(90, 90), transformToGecko.Transform(gfxPoint(90, 90)));
  1.1053 +
  1.1054 +  // Hit test ouside the reach of any layer
  1.1055 +  hit = GetTargetAPZC(manager, ScreenPoint(1000, 10), transformToApzc, transformToGecko);
  1.1056 +  EXPECT_EQ(nullAPZC, hit.get());
  1.1057 +  EXPECT_EQ(gfx3DMatrix(), transformToApzc);
  1.1058 +  EXPECT_EQ(gfx3DMatrix(), transformToGecko);
  1.1059 +  hit = GetTargetAPZC(manager, ScreenPoint(-1000, 10), transformToApzc, transformToGecko);
  1.1060 +  EXPECT_EQ(nullAPZC, hit.get());
  1.1061 +  EXPECT_EQ(gfx3DMatrix(), transformToApzc);
  1.1062 +  EXPECT_EQ(gfx3DMatrix(), transformToGecko);
  1.1063 +
  1.1064 +  manager->ClearTree();
  1.1065 +}
  1.1066 +
  1.1067 +// A more involved hit testing test that involves css and async transforms.
  1.1068 +TEST_F(APZCTreeManagerTester, HitTesting2) {
  1.1069 +  nsTArray<nsRefPtr<Layer> > layers;
  1.1070 +  nsRefPtr<LayerManager> lm;
  1.1071 +  nsRefPtr<Layer> root = CreateTestLayerTree2(lm, layers);
  1.1072 +
  1.1073 +  TimeStamp testStartTime = TimeStamp::Now();
  1.1074 +  AsyncPanZoomController::SetFrameTime(testStartTime);
  1.1075 +  nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
  1.1076 +  ScopedLayerTreeRegistration controller(0, root, mcc);
  1.1077 +
  1.1078 +  nsRefPtr<TestAPZCTreeManager> manager = new TestAPZCTreeManager();
  1.1079 +  nsRefPtr<AsyncPanZoomController> hit;
  1.1080 +  gfx3DMatrix transformToApzc;
  1.1081 +  gfx3DMatrix transformToGecko;
  1.1082 +
  1.1083 +  // Set a CSS transform on one of the layers.
  1.1084 +  Matrix4x4 transform;
  1.1085 +  transform = transform * Matrix4x4().Scale(2, 1, 1);
  1.1086 +  layers[2]->SetBaseTransform(transform);
  1.1087 +
  1.1088 +  // Make some other layers scrollable.
  1.1089 +  SetScrollableFrameMetrics(root, FrameMetrics::START_SCROLL_ID, CSSRect(0, 0, 200, 200));
  1.1090 +  SetScrollableFrameMetrics(layers[1], FrameMetrics::START_SCROLL_ID + 1, CSSRect(0, 0, 80, 80));
  1.1091 +  SetScrollableFrameMetrics(layers[3], FrameMetrics::START_SCROLL_ID + 2, CSSRect(0, 0, 80, 80));
  1.1092 +
  1.1093 +  manager->UpdatePanZoomControllerTree(nullptr, root, false, 0);
  1.1094 +
  1.1095 +  // At this point, the following holds (all coordinates in screen pixels):
  1.1096 +  // layers[0] has content from (0,0)-(200,200), clipped by composition bounds (0,0)-(100,100)
  1.1097 +  // layers[1] has content from (10,10)-(90,90), clipped by composition bounds (10,10)-(50,50)
  1.1098 +  // layers[2] has content from (20,60)-(100,100). no clipping as it's not a scrollable layer
  1.1099 +  // layers[3] has content from (20,60)-(180,140), clipped by composition bounds (20,60)-(100,100)
  1.1100 +
  1.1101 +  AsyncPanZoomController* apzcroot = root->AsContainerLayer()->GetAsyncPanZoomController();
  1.1102 +  AsyncPanZoomController* apzc1 = layers[1]->AsContainerLayer()->GetAsyncPanZoomController();
  1.1103 +  AsyncPanZoomController* apzc3 = layers[3]->AsContainerLayer()->GetAsyncPanZoomController();
  1.1104 +
  1.1105 +  // Hit an area that's clearly on the root layer but not any of the child layers.
  1.1106 +  hit = GetTargetAPZC(manager, ScreenPoint(75, 25), transformToApzc, transformToGecko);
  1.1107 +  EXPECT_EQ(apzcroot, hit.get());
  1.1108 +  EXPECT_EQ(gfxPoint(75, 25), transformToApzc.Transform(gfxPoint(75, 25)));
  1.1109 +  EXPECT_EQ(gfxPoint(75, 25), transformToGecko.Transform(gfxPoint(75, 25)));
  1.1110 +
  1.1111 +  // Hit an area on the root that would be on layers[3] if layers[2]
  1.1112 +  // weren't transformed.
  1.1113 +  // Note that if layers[2] were scrollable, then this would hit layers[2]
  1.1114 +  // because its composition bounds would be at (10,60)-(50,100) (and the
  1.1115 +  // scale-only transform that we set on layers[2] would be invalid because
  1.1116 +  // it would place the layer into overscroll, as its composition bounds
  1.1117 +  // start at x=10 but its content at x=20).
  1.1118 +  hit = GetTargetAPZC(manager, ScreenPoint(15, 75), transformToApzc, transformToGecko);
  1.1119 +  EXPECT_EQ(apzcroot, hit.get());
  1.1120 +  EXPECT_EQ(gfxPoint(15, 75), transformToApzc.Transform(gfxPoint(15, 75)));
  1.1121 +  EXPECT_EQ(gfxPoint(15, 75), transformToGecko.Transform(gfxPoint(15, 75)));
  1.1122 +
  1.1123 +  // Hit an area on layers[1].
  1.1124 +  hit = GetTargetAPZC(manager, ScreenPoint(25, 25), transformToApzc, transformToGecko);
  1.1125 +  EXPECT_EQ(apzc1, hit.get());
  1.1126 +  EXPECT_EQ(gfxPoint(25, 25), transformToApzc.Transform(gfxPoint(25, 25)));
  1.1127 +  EXPECT_EQ(gfxPoint(25, 25), transformToGecko.Transform(gfxPoint(25, 25)));
  1.1128 +
  1.1129 +  // Hit an area on layers[3].
  1.1130 +  hit = GetTargetAPZC(manager, ScreenPoint(25, 75), transformToApzc, transformToGecko);
  1.1131 +  EXPECT_EQ(apzc3, hit.get());
  1.1132 +  // transformToApzc should unapply layers[2]'s transform
  1.1133 +  EXPECT_EQ(gfxPoint(12.5, 75), transformToApzc.Transform(gfxPoint(25, 75)));
  1.1134 +  // and transformToGecko should reapply it
  1.1135 +  EXPECT_EQ(gfxPoint(25, 75), transformToGecko.Transform(gfxPoint(12.5, 75)));
  1.1136 +
  1.1137 +  // Hit an area on layers[3] that would be on the root if layers[2]
  1.1138 +  // weren't transformed.
  1.1139 +  hit = GetTargetAPZC(manager, ScreenPoint(75, 75), transformToApzc, transformToGecko);
  1.1140 +  EXPECT_EQ(apzc3, hit.get());
  1.1141 +  // transformToApzc should unapply layers[2]'s transform
  1.1142 +  EXPECT_EQ(gfxPoint(37.5, 75), transformToApzc.Transform(gfxPoint(75, 75)));
  1.1143 +  // and transformToGecko should reapply it
  1.1144 +  EXPECT_EQ(gfxPoint(75, 75), transformToGecko.Transform(gfxPoint(37.5, 75)));
  1.1145 +
  1.1146 +  // Pan the root layer upward by 50 pixels.
  1.1147 +  // This causes layers[1] to scroll out of view, and an async transform
  1.1148 +  // of -50 to be set on the root layer.
  1.1149 +  int time = 0;
  1.1150 +  // Silence GMock warnings about "uninteresting mock function calls".
  1.1151 +  EXPECT_CALL(*mcc, PostDelayedTask(_,_)).Times(AtLeast(1));
  1.1152 +  EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
  1.1153 +  EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
  1.1154 +
  1.1155 +  // This first pan will move the APZC by 50 pixels, and dispatch a paint request.
  1.1156 +  // Since this paint request is in the queue to Gecko, transformToGecko will
  1.1157 +  // take it into account.
  1.1158 +  ApzcPan(apzcroot, manager, time, 100, 50);
  1.1159 +
  1.1160 +  // Hit where layers[3] used to be. It should now hit the root.
  1.1161 +  hit = GetTargetAPZC(manager, ScreenPoint(75, 75), transformToApzc, transformToGecko);
  1.1162 +  EXPECT_EQ(apzcroot, hit.get());
  1.1163 +  // transformToApzc doesn't unapply the root's own async transform
  1.1164 +  EXPECT_EQ(gfxPoint(75, 75), transformToApzc.Transform(gfxPoint(75, 75)));
  1.1165 +  // and transformToGecko unapplies it and then reapplies it, because by the
  1.1166 +  // time the event being transformed reaches Gecko the new paint request will
  1.1167 +  // have been handled.
  1.1168 +  EXPECT_EQ(gfxPoint(75, 75), transformToGecko.Transform(gfxPoint(75, 75)));
  1.1169 +
  1.1170 +  // Hit where layers[1] used to be and where layers[3] should now be.
  1.1171 +  hit = GetTargetAPZC(manager, ScreenPoint(25, 25), transformToApzc, transformToGecko);
  1.1172 +  EXPECT_EQ(apzc3, hit.get());
  1.1173 +  // transformToApzc unapplies both layers[2]'s css transform and the root's
  1.1174 +  // async transform
  1.1175 +  EXPECT_EQ(gfxPoint(12.5, 75), transformToApzc.Transform(gfxPoint(25, 25)));
  1.1176 +  // transformToGecko reapplies both the css transform and the async transform
  1.1177 +  // because we have already issued a paint request with it.
  1.1178 +  EXPECT_EQ(gfxPoint(25, 25), transformToGecko.Transform(gfxPoint(12.5, 75)));
  1.1179 +
  1.1180 +  // This second pan will move the APZC by another 50 pixels but since the paint
  1.1181 +  // request dispatched above has not "completed", we will not dispatch another
  1.1182 +  // one yet. Now we have an async transform on top of the pending paint request
  1.1183 +  // transform.
  1.1184 +  ApzcPan(apzcroot, manager, time, 100, 50);
  1.1185 +
  1.1186 +  // Hit where layers[3] used to be. It should now hit the root.
  1.1187 +  hit = GetTargetAPZC(manager, ScreenPoint(75, 75), transformToApzc, transformToGecko);
  1.1188 +  EXPECT_EQ(apzcroot, hit.get());
  1.1189 +  // transformToApzc doesn't unapply the root's own async transform
  1.1190 +  EXPECT_EQ(gfxPoint(75, 75), transformToApzc.Transform(gfxPoint(75, 75)));
  1.1191 +  // transformToGecko unapplies the full async transform of -100 pixels, and then
  1.1192 +  // reapplies the "D" transform of -50 leading to an overall adjustment of +50
  1.1193 +  EXPECT_EQ(gfxPoint(75, 125), transformToGecko.Transform(gfxPoint(75, 75)));
  1.1194 +
  1.1195 +  // Hit where layers[1] used to be. It should now hit the root.
  1.1196 +  hit = GetTargetAPZC(manager, ScreenPoint(25, 25), transformToApzc, transformToGecko);
  1.1197 +  EXPECT_EQ(apzcroot, hit.get());
  1.1198 +  // transformToApzc doesn't unapply the root's own async transform
  1.1199 +  EXPECT_EQ(gfxPoint(25, 25), transformToApzc.Transform(gfxPoint(25, 25)));
  1.1200 +  // transformToGecko unapplies the full async transform of -100 pixels, and then
  1.1201 +  // reapplies the "D" transform of -50 leading to an overall adjustment of +50
  1.1202 +  EXPECT_EQ(gfxPoint(25, 75), transformToGecko.Transform(gfxPoint(25, 25)));
  1.1203 +
  1.1204 +  manager->ClearTree();
  1.1205 +}

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