The Tor Browser: gfx/tests/gtest/TestAsyncPanZoomController.cpp@6474c204b198 (annotated)

gfx/tests/gtest/TestAsyncPanZoomController.cpp@6474c204b198 (annotated)

gfx/tests/gtest/TestAsyncPanZoomController.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* vim:set ts=2 sw=2 sts=2 et: */
 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/
  */
 #include "gtest/gtest.h"
 #include "gmock/gmock.h"
 #include "mozilla/Attributes.h"
 #include "mozilla/layers/AsyncCompositionManager.h" // for ViewTransform
 #include "mozilla/layers/AsyncPanZoomController.h"
 #include "mozilla/layers/LayerManagerComposite.h"
 #include "mozilla/layers/GeckoContentController.h"
 #include "mozilla/layers/CompositorParent.h"
 #include "mozilla/layers/APZCTreeManager.h"
 #include "base/task.h"
 #include "Layers.h"
 #include "TestLayers.h"
 #include "gfxPrefs.h"
 using namespace mozilla;
 using namespace mozilla::gfx;
 using namespace mozilla::layers;
 using ::testing::_;
 using ::testing::NiceMock;
 using ::testing::AtLeast;
 using ::testing::AtMost;
 using ::testing::MockFunction;
 using ::testing::InSequence;
 class Task;
 class AsyncPanZoomControllerTester : public ::testing::Test {
 protected:
   virtual void SetUp() {
     gfxPrefs::GetSingleton();
   }
   virtual void TearDown() {
     gfxPrefs::DestroySingleton();
   }
 };
 class APZCTreeManagerTester : public ::testing::Test {
 protected:
   virtual void SetUp() {
     gfxPrefs::GetSingleton();
   }
   virtual void TearDown() {
     gfxPrefs::DestroySingleton();
   }
 };
 class MockContentController : public GeckoContentController {
 public:
   MOCK_METHOD1(RequestContentRepaint, void(const FrameMetrics&));
   MOCK_METHOD2(AcknowledgeScrollUpdate, void(const FrameMetrics::ViewID&, const uint32_t& aScrollGeneration));
   MOCK_METHOD3(HandleDoubleTap, void(const CSSPoint&, int32_t, const ScrollableLayerGuid&));
   MOCK_METHOD3(HandleSingleTap, void(const CSSPoint&, int32_t, const ScrollableLayerGuid&));
   MOCK_METHOD3(HandleLongTap, void(const CSSPoint&, int32_t, const ScrollableLayerGuid&));
   MOCK_METHOD3(HandleLongTapUp, void(const CSSPoint&, int32_t, const ScrollableLayerGuid&));
   MOCK_METHOD3(SendAsyncScrollDOMEvent, void(bool aIsRoot, const CSSRect &aContentRect, const CSSSize &aScrollableSize));
   MOCK_METHOD2(PostDelayedTask, void(Task* aTask, int aDelayMs));
 };
 class MockContentControllerDelayed : public MockContentController {
 public:
   MockContentControllerDelayed()
   {
   }
   void PostDelayedTask(Task* aTask, int aDelayMs) {
     mTaskQueue.AppendElement(aTask);
   }
   void CheckHasDelayedTask() {
     EXPECT_TRUE(mTaskQueue.Length() > 0);
   }
   void ClearDelayedTask() {
     mTaskQueue.RemoveElementAt(0);
   }
   void DestroyOldestTask() {
     delete mTaskQueue[0];
     mTaskQueue.RemoveElementAt(0);
   }
   // Note that deleting mCurrentTask is important in order to
   // release the reference to the callee object. Without this
   // that object might be leaked. This is also why we don't
   // expose mTaskQueue to any users of MockContentControllerDelayed.
   void RunDelayedTask() {
     mTaskQueue[0]->Run();
     delete mTaskQueue[0];
     mTaskQueue.RemoveElementAt(0);
   }
 private:
   nsTArray<Task*> mTaskQueue;
 };
 class TestAPZCContainerLayer : public ContainerLayer {
   public:
     TestAPZCContainerLayer()
       : ContainerLayer(nullptr, nullptr)
     {}
   bool RemoveChild(Layer* aChild) { return true; }
   bool InsertAfter(Layer* aChild, Layer* aAfter) { return true; }
   void ComputeEffectiveTransforms(const Matrix4x4& aTransformToSurface) {}
   bool RepositionChild(Layer* aChild, Layer* aAfter) { return true; }
 };
 class TestAsyncPanZoomController : public AsyncPanZoomController {
 public:
   TestAsyncPanZoomController(uint64_t aLayersId, MockContentController* aMcc,
                              APZCTreeManager* aTreeManager = nullptr,
                              GestureBehavior aBehavior = DEFAULT_GESTURES)
     : AsyncPanZoomController(aLayersId, aTreeManager, aMcc, aBehavior)
   {}
   // Since touch-action-enabled property is global - setting it for each test
   // separately isn't safe from the concurrency point of view. To make tests
   // run concurrent and independent from each other we have a member variable
   // mTouchActionEnabled for each apzc and setter defined here.
   void SetTouchActionEnabled(const bool touchActionEnabled) {
     ReentrantMonitorAutoEnter lock(mMonitor);
     mTouchActionPropertyEnabled = touchActionEnabled;
   }
   void SetFrameMetrics(const FrameMetrics& metrics) {
     ReentrantMonitorAutoEnter lock(mMonitor);
     mFrameMetrics = metrics;
   }
   FrameMetrics GetFrameMetrics() {
     ReentrantMonitorAutoEnter lock(mMonitor);
     return mFrameMetrics;
   }
 };
 class TestAPZCTreeManager : public APZCTreeManager {
 protected:
   void AssertOnCompositorThread() MOZ_OVERRIDE { /* no-op */ }
 public:
   // Expose this so test code can call it directly.
   void BuildOverscrollHandoffChain(AsyncPanZoomController* aApzc) {
     APZCTreeManager::BuildOverscrollHandoffChain(aApzc);
   }
 };
 static
 FrameMetrics TestFrameMetrics() {
   FrameMetrics fm;
   fm.mDisplayPort = CSSRect(0, 0, 10, 10);
   fm.mCompositionBounds = ParentLayerIntRect(0, 0, 10, 10);
   fm.mCriticalDisplayPort = CSSRect(0, 0, 10, 10);
   fm.mScrollableRect = CSSRect(0, 0, 100, 100);
   fm.mViewport = CSSRect(0, 0, 10, 10);
   return fm;
 }
 /*
  * Dispatches mock touch events to the apzc and checks whether apzc properly
  * consumed them and triggered scrolling behavior.
  */
 static
 void ApzcPan(AsyncPanZoomController* apzc,
              TestAPZCTreeManager* aTreeManager,
              int& aTime,
              int aTouchStartY,
              int aTouchEndY,
              bool expectIgnoredPan = false,
              bool hasTouchListeners = false,
              nsTArray<uint32_t>* aAllowedTouchBehaviors = nullptr) {
   const int TIME_BETWEEN_TOUCH_EVENT = 100;
   const int OVERCOME_TOUCH_TOLERANCE = 100;
   MultiTouchInput mti;
   nsEventStatus status;
   // Since we're passing inputs directly to the APZC instead of going through
   // the tree manager, we need to build the overscroll handoff chain explicitly
   // for panning to work correctly.
   aTreeManager->BuildOverscrollHandoffChain(apzc);
   nsEventStatus touchStartStatus;
   if (hasTouchListeners) {
     // APZC shouldn't consume the start event now, instead queueing it up
     // waiting for content's response.
     touchStartStatus = nsEventStatus_eIgnore;
   } else {
     // APZC should go into the touching state and therefore consume the event.
     touchStartStatus = nsEventStatus_eConsumeNoDefault;
   }
   mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_START, aTime, 0);
   aTime += TIME_BETWEEN_TOUCH_EVENT;
   // Make sure the move is large enough to not be handled as a tap
   mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(10, aTouchStartY+OVERCOME_TOUCH_TOLERANCE), ScreenSize(0, 0), 0, 0));
   status = apzc->ReceiveInputEvent(mti);
   EXPECT_EQ(touchStartStatus, status);
   // APZC should be in TOUCHING state
   // Allowed touch behaviours must be set after sending touch-start.
   if (aAllowedTouchBehaviors) {
     apzc->SetAllowedTouchBehavior(*aAllowedTouchBehaviors);
   }
   nsEventStatus touchMoveStatus;
   if (expectIgnoredPan) {
     // APZC should ignore panning, be in TOUCHING state and therefore return eIgnore.
     // The same applies to all consequent touch move events.
     touchMoveStatus = nsEventStatus_eIgnore;
   } else {
     // APZC should go into the panning state and therefore consume the event.
     touchMoveStatus = nsEventStatus_eConsumeNoDefault;
   }
   mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, aTime, 0);
   aTime += TIME_BETWEEN_TOUCH_EVENT;
   mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(10, aTouchStartY), ScreenSize(0, 0), 0, 0));
   status = apzc->ReceiveInputEvent(mti);
   EXPECT_EQ(touchMoveStatus, status);
   mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, aTime, 0);
   aTime += TIME_BETWEEN_TOUCH_EVENT;
   mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(10, aTouchEndY), ScreenSize(0, 0), 0, 0));
   status = apzc->ReceiveInputEvent(mti);
   EXPECT_EQ(touchMoveStatus, status);
   mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_END, aTime, 0);
   aTime += TIME_BETWEEN_TOUCH_EVENT;
   mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(10, aTouchEndY), ScreenSize(0, 0), 0, 0));
   status = apzc->ReceiveInputEvent(mti);
 }
 static
 void DoPanTest(bool aShouldTriggerScroll, bool aShouldUseTouchAction, uint32_t aBehavior)
 {
   TimeStamp testStartTime = TimeStamp::Now();
   AsyncPanZoomController::SetFrameTime(testStartTime);
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc, tm);
   apzc->SetTouchActionEnabled(aShouldUseTouchAction);
   apzc->SetFrameMetrics(TestFrameMetrics());
   apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   if (aShouldTriggerScroll) {
     EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
     EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   } else {
     EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(0);
     EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(0);
   }
   int time = 0;
   int touchStart = 50;
   int touchEnd = 10;
   ScreenPoint pointOut;
   ViewTransform viewTransformOut;
   nsTArray<uint32_t> allowedTouchBehaviors;
   allowedTouchBehaviors.AppendElement(aBehavior);
   // Pan down
   ApzcPan(apzc, tm, time, touchStart, touchEnd, !aShouldTriggerScroll, false, &allowedTouchBehaviors);
   apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   if (aShouldTriggerScroll) {
     EXPECT_EQ(ScreenPoint(0, -(touchEnd-touchStart)), pointOut);
     EXPECT_NE(ViewTransform(), viewTransformOut);
   } else {
     EXPECT_EQ(ScreenPoint(), pointOut);
     EXPECT_EQ(ViewTransform(), viewTransformOut);
   }
   // Pan back
   ApzcPan(apzc, tm, time, touchEnd, touchStart, !aShouldTriggerScroll, false, &allowedTouchBehaviors);
   apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ScreenPoint(), pointOut);
   EXPECT_EQ(ViewTransform(), viewTransformOut);
   apzc->Destroy();
 }
 static void
 ApzcPinch(AsyncPanZoomController* aApzc, int aFocusX, int aFocusY, float aScale) {
   aApzc->HandleGestureEvent(PinchGestureInput(PinchGestureInput::PINCHGESTURE_START,
 ,
                                             ScreenPoint(aFocusX, aFocusY),
 .0,
 .0,
 ));
   aApzc->HandleGestureEvent(PinchGestureInput(PinchGestureInput::PINCHGESTURE_SCALE,
 ,
                                             ScreenPoint(aFocusX, aFocusY),
 .0 * aScale,
 .0,
 ));
   aApzc->HandleGestureEvent(PinchGestureInput(PinchGestureInput::PINCHGESTURE_END,
 ,
                                             ScreenPoint(aFocusX, aFocusY),
                                             // note: negative values here tell APZC
                                             //       not to turn the pinch into a pan
                                             -1.0,
                                             -1.0,
 ));
 }
 static nsEventStatus
 ApzcDown(AsyncPanZoomController* apzc, int aX, int aY, int& aTime) {
   MultiTouchInput mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_START, aTime, 0);
   mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(aX, aY), ScreenSize(0, 0), 0, 0));
   return apzc->ReceiveInputEvent(mti);
 }
 static nsEventStatus
 ApzcUp(AsyncPanZoomController* apzc, int aX, int aY, int& aTime) {
   MultiTouchInput mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_END, aTime, 0);
   mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(aX, aY), ScreenSize(0, 0), 0, 0));
   return apzc->ReceiveInputEvent(mti);
 }
 static nsEventStatus
 ApzcTap(AsyncPanZoomController* apzc, int aX, int aY, int& aTime, int aTapLength, MockContentControllerDelayed* mcc = nullptr) {
   nsEventStatus status = ApzcDown(apzc, aX, aY, aTime);
   if (mcc != nullptr) {
     // There will be delayed tasks posted for the long-tap and MAX_TAP timeouts, but
     // if we were provided a non-null mcc we want to clear them.
     mcc->CheckHasDelayedTask();
     mcc->ClearDelayedTask();
     mcc->CheckHasDelayedTask();
     mcc->ClearDelayedTask();
   }
   EXPECT_EQ(nsEventStatus_eConsumeNoDefault, status);
   aTime += aTapLength;
   return ApzcUp(apzc, aX, aY, aTime);
 }
 TEST_F(AsyncPanZoomControllerTester, Constructor) {
   // RefCounted class can't live in the stack
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   apzc->SetFrameMetrics(TestFrameMetrics());
 }
 TEST_F(AsyncPanZoomControllerTester, Pinch) {
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   FrameMetrics fm;
   fm.mViewport = CSSRect(0, 0, 980, 480);
   fm.mCompositionBounds = ParentLayerIntRect(200, 200, 100, 200);
   fm.mScrollableRect = CSSRect(0, 0, 980, 1000);
   fm.SetScrollOffset(CSSPoint(300, 300));
   fm.SetZoom(CSSToScreenScale(2.0));
   apzc->SetFrameMetrics(fm);
   apzc->UpdateZoomConstraints(ZoomConstraints(true, true, CSSToScreenScale(0.25), CSSToScreenScale(4.0)));
   // the visible area of the document in CSS pixels is x=300 y=300 w=50 h=100
   EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   ApzcPinch(apzc, 250, 300, 1.25);
   // the visible area of the document in CSS pixels is now x=305 y=310 w=40 h=80
   fm = apzc->GetFrameMetrics();
   EXPECT_EQ(2.5f, fm.GetZoom().scale);
   EXPECT_EQ(305, fm.GetScrollOffset().x);
   EXPECT_EQ(310, fm.GetScrollOffset().y);
   // part 2 of the test, move to the top-right corner of the page and pinch and
   // make sure we stay in the correct spot
   fm.SetZoom(CSSToScreenScale(2.0));
   fm.SetScrollOffset(CSSPoint(930, 5));
   apzc->SetFrameMetrics(fm);
   // the visible area of the document in CSS pixels is x=930 y=5 w=50 h=100
   ApzcPinch(apzc, 250, 300, 0.5);
   // the visible area of the document in CSS pixels is now x=880 y=0 w=100 h=200
   fm = apzc->GetFrameMetrics();
   EXPECT_EQ(1.0f, fm.GetZoom().scale);
   EXPECT_EQ(880, fm.GetScrollOffset().x);
   EXPECT_EQ(0, fm.GetScrollOffset().y);
   apzc->Destroy();
 }
 TEST_F(AsyncPanZoomControllerTester, PinchWithTouchActionNone) {
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   FrameMetrics fm;
   fm.mViewport = CSSRect(0, 0, 980, 480);
   fm.mCompositionBounds = ParentLayerIntRect(200, 200, 100, 200);
   fm.mScrollableRect = CSSRect(0, 0, 980, 1000);
   fm.SetScrollOffset(CSSPoint(300, 300));
   fm.SetZoom(CSSToScreenScale(2.0));
   apzc->SetFrameMetrics(fm);
   // the visible area of the document in CSS pixels is x=300 y=300 w=50 h=100
   // Apzc's OnScaleEnd method calls once SendAsyncScrollDOMEvent and RequestContentRepaint methods,
   // therefore we're setting these specific values.
   EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtMost(1));
   EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(AtMost(1));
   nsTArray<uint32_t> values;
   values.AppendElement(mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN);
   values.AppendElement(mozilla::layers::AllowedTouchBehavior::PINCH_ZOOM);
   apzc->SetTouchActionEnabled(true);
   apzc->SetAllowedTouchBehavior(values);
   ApzcPinch(apzc, 250, 300, 1.25);
   // The frame metrics should stay the same since touch-action:none makes
   // apzc ignore pinch gestures.
   fm = apzc->GetFrameMetrics();
   EXPECT_EQ(2.0f, fm.GetZoom().scale);
   EXPECT_EQ(300, fm.GetScrollOffset().x);
   EXPECT_EQ(300, fm.GetScrollOffset().y);
 }
 TEST_F(AsyncPanZoomControllerTester, Overzoom) {
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   FrameMetrics fm;
   fm.mViewport = CSSRect(0, 0, 100, 100);
   fm.mCompositionBounds = ParentLayerIntRect(0, 0, 100, 100);
   fm.mScrollableRect = CSSRect(0, 0, 125, 150);
   fm.SetScrollOffset(CSSPoint(10, 0));
   fm.SetZoom(CSSToScreenScale(1.0));
   apzc->SetFrameMetrics(fm);
   apzc->UpdateZoomConstraints(ZoomConstraints(true, true, CSSToScreenScale(0.25), CSSToScreenScale(4.0)));
   // the visible area of the document in CSS pixels is x=10 y=0 w=100 h=100
   EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   ApzcPinch(apzc, 50, 50, 0.5);
   fm = apzc->GetFrameMetrics();
   EXPECT_EQ(0.8f, fm.GetZoom().scale);
   // bug 936721 - PGO builds introduce rounding error so
   // use a fuzzy match instead
   EXPECT_LT(abs(fm.GetScrollOffset().x), 1e-5);
   EXPECT_LT(abs(fm.GetScrollOffset().y), 1e-5);
 }
 TEST_F(AsyncPanZoomControllerTester, SimpleTransform) {
   TimeStamp testStartTime = TimeStamp::Now();
   // RefCounted class can't live in the stack
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   apzc->SetFrameMetrics(TestFrameMetrics());
   ScreenPoint pointOut;
   ViewTransform viewTransformOut;
   apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ScreenPoint(), pointOut);
   EXPECT_EQ(ViewTransform(), viewTransformOut);
 }
 TEST_F(AsyncPanZoomControllerTester, ComplexTransform) {
   TimeStamp testStartTime = TimeStamp::Now();
   AsyncPanZoomController::SetFrameTime(testStartTime);
   // This test assumes there is a page that gets rendered to
   // two layers. In CSS pixels, the first layer is 50x50 and
   // the second layer is 25x50. The widget scale factor is 3.0
   // and the presShell resolution is 2.0. Therefore, these layers
   // end up being 300x300 and 150x300 in layer pixels.
   //
   // The second (child) layer has an additional CSS transform that
   // stretches it by 2.0 on the x-axis. Therefore, after applying
   // CSS transforms, the two layers are the same size in screen
   // pixels.
   //
   // The screen itself is 24x24 in screen pixels (therefore 4x4 in
   // CSS pixels). The displayport is 1 extra CSS pixel on all
   // sides.
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc);
   nsRefPtr<TestAsyncPanZoomController> childApzc = new TestAsyncPanZoomController(0, mcc);
   const char* layerTreeSyntax = "c(c)";
   // LayerID                     0 1
   nsIntRegion layerVisibleRegion[] = {
     nsIntRegion(nsIntRect(0, 0, 300, 300)),
     nsIntRegion(nsIntRect(0, 0, 150, 300)),
   };
   gfx3DMatrix transforms[] = {
     gfx3DMatrix(),
     gfx3DMatrix(),
   };
   transforms[0].ScalePost(0.5f, 0.5f, 1.0f); // this results from the 2.0 resolution on the root layer
   transforms[1].ScalePost(2.0f, 1.0f, 1.0f); // this is the 2.0 x-axis CSS transform on the child layer
   nsTArray<nsRefPtr<Layer> > layers;
   nsRefPtr<LayerManager> lm;
   nsRefPtr<Layer> root = CreateLayerTree(layerTreeSyntax, layerVisibleRegion, transforms, lm, layers);
   FrameMetrics metrics;
   metrics.mCompositionBounds = ParentLayerIntRect(0, 0, 24, 24);
   metrics.mDisplayPort = CSSRect(-1, -1, 6, 6);
   metrics.mViewport = CSSRect(0, 0, 4, 4);
   metrics.SetScrollOffset(CSSPoint(10, 10));
   metrics.mScrollableRect = CSSRect(0, 0, 50, 50);
   metrics.mCumulativeResolution = LayoutDeviceToLayerScale(2);
   metrics.mResolution = ParentLayerToLayerScale(2);
   metrics.SetZoom(CSSToScreenScale(6));
   metrics.mDevPixelsPerCSSPixel = CSSToLayoutDeviceScale(3);
   metrics.SetScrollId(FrameMetrics::START_SCROLL_ID);
   FrameMetrics childMetrics = metrics;
   childMetrics.SetScrollId(FrameMetrics::START_SCROLL_ID + 1);
   layers[0]->AsContainerLayer()->SetFrameMetrics(metrics);
   layers[1]->AsContainerLayer()->SetFrameMetrics(childMetrics);
   ScreenPoint pointOut;
   ViewTransform viewTransformOut;
   // Both the parent and child layer should behave exactly the same here, because
   // the CSS transform on the child layer does not affect the SampleContentTransformForFrame code
   // initial transform
   apzc->SetFrameMetrics(metrics);
   apzc->NotifyLayersUpdated(metrics, true);
   apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ViewTransform(LayerPoint(), ParentLayerToScreenScale(2)), viewTransformOut);
   EXPECT_EQ(ScreenPoint(60, 60), pointOut);
   childApzc->SetFrameMetrics(childMetrics);
   childApzc->NotifyLayersUpdated(childMetrics, true);
   childApzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ViewTransform(LayerPoint(), ParentLayerToScreenScale(2)), viewTransformOut);
   EXPECT_EQ(ScreenPoint(60, 60), pointOut);
   // do an async scroll by 5 pixels and check the transform
   metrics.ScrollBy(CSSPoint(5, 0));
   apzc->SetFrameMetrics(metrics);
   apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ViewTransform(LayerPoint(-30, 0), ParentLayerToScreenScale(2)), viewTransformOut);
   EXPECT_EQ(ScreenPoint(90, 60), pointOut);
   childMetrics.ScrollBy(CSSPoint(5, 0));
   childApzc->SetFrameMetrics(childMetrics);
   childApzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ViewTransform(LayerPoint(-30, 0), ParentLayerToScreenScale(2)), viewTransformOut);
   EXPECT_EQ(ScreenPoint(90, 60), pointOut);
   // do an async zoom of 1.5x and check the transform
   metrics.ZoomBy(1.5f);
   apzc->SetFrameMetrics(metrics);
   apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ViewTransform(LayerPoint(-30, 0), ParentLayerToScreenScale(3)), viewTransformOut);
   EXPECT_EQ(ScreenPoint(135, 90), pointOut);
   childMetrics.ZoomBy(1.5f);
   childApzc->SetFrameMetrics(childMetrics);
   childApzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ViewTransform(LayerPoint(-30, 0), ParentLayerToScreenScale(3)), viewTransformOut);
   EXPECT_EQ(ScreenPoint(135, 90), pointOut);
 }
 TEST_F(AsyncPanZoomControllerTester, Pan) {
   DoPanTest(true, false, mozilla::layers::AllowedTouchBehavior::NONE);
 }
 // In the each of the following 4 pan tests we are performing two pan gestures: vertical pan from top
 // to bottom and back - from bottom to top.
 // According to the pointer-events/touch-action spec AUTO and PAN_Y touch-action values allow vertical
 // scrolling while NONE and PAN_X forbid it. The first parameter of DoPanTest method specifies this
 // behavior.
 TEST_F(AsyncPanZoomControllerTester, PanWithTouchActionAuto) {
   DoPanTest(true, true,
             mozilla::layers::AllowedTouchBehavior::HORIZONTAL_PAN | mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN);
 }
 TEST_F(AsyncPanZoomControllerTester, PanWithTouchActionNone) {
   DoPanTest(false, true, 0);
 }
 TEST_F(AsyncPanZoomControllerTester, PanWithTouchActionPanX) {
   DoPanTest(false, true, mozilla::layers::AllowedTouchBehavior::HORIZONTAL_PAN);
 }
 TEST_F(AsyncPanZoomControllerTester, PanWithTouchActionPanY) {
   DoPanTest(true, true, mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN);
 }
 TEST_F(AsyncPanZoomControllerTester, PanWithPreventDefault) {
   TimeStamp testStartTime = TimeStamp::Now();
   AsyncPanZoomController::SetFrameTime(testStartTime);
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc, tm);
   FrameMetrics frameMetrics(TestFrameMetrics());
   frameMetrics.mMayHaveTouchListeners = true;
   apzc->SetFrameMetrics(frameMetrics);
   apzc->NotifyLayersUpdated(frameMetrics, true);
   int time = 0;
   int touchStart = 50;
   int touchEnd = 10;
   ScreenPoint pointOut;
   ViewTransform viewTransformOut;
   // Pan down
   nsTArray<uint32_t> allowedTouchBehaviors;
   allowedTouchBehaviors.AppendElement(mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN);
   apzc->SetTouchActionEnabled(true);
   ApzcPan(apzc, tm, time, touchStart, touchEnd, true, true, &allowedTouchBehaviors);
   // Send the signal that content has handled and preventDefaulted the touch
   // events. This flushes the event queue.
   apzc->ContentReceivedTouch(true);
   apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ScreenPoint(), pointOut);
   EXPECT_EQ(ViewTransform(), viewTransformOut);
   apzc->Destroy();
 }
 TEST_F(AsyncPanZoomControllerTester, Fling) {
   TimeStamp testStartTime = TimeStamp::Now();
   AsyncPanZoomController::SetFrameTime(testStartTime);
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc, tm);
   apzc->SetFrameMetrics(TestFrameMetrics());
   apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   int time = 0;
   int touchStart = 50;
   int touchEnd = 10;
   ScreenPoint pointOut;
   ViewTransform viewTransformOut;
   // Fling down. Each step scroll further down
   ApzcPan(apzc, tm, time, touchStart, touchEnd);
   ScreenPoint lastPoint;
   for (int i = 1; i < 50; i+=1) {
     apzc->SampleContentTransformForFrame(testStartTime+TimeDuration::FromMilliseconds(i), &viewTransformOut, pointOut);
     EXPECT_GT(pointOut.y, lastPoint.y);
     lastPoint = pointOut;
   }
 }
 TEST_F(AsyncPanZoomControllerTester, OverScrollPanning) {
   TimeStamp testStartTime = TimeStamp::Now();
   AsyncPanZoomController::SetFrameTime(testStartTime);
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(0, mcc, tm);
   apzc->SetFrameMetrics(TestFrameMetrics());
   apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   // Pan sufficiently to hit overscroll behavior
   int time = 0;
   int touchStart = 500;
   int touchEnd = 10;
   ScreenPoint pointOut;
   ViewTransform viewTransformOut;
   // Pan down
   ApzcPan(apzc, tm, time, touchStart, touchEnd);
   apzc->SampleContentTransformForFrame(testStartTime+TimeDuration::FromMilliseconds(1000), &viewTransformOut, pointOut);
   EXPECT_EQ(ScreenPoint(0, 90), pointOut);
 }
 TEST_F(AsyncPanZoomControllerTester, ShortPress) {
   nsRefPtr<MockContentControllerDelayed> mcc = new NiceMock<MockContentControllerDelayed>();
   nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(
 , mcc, tm, AsyncPanZoomController::USE_GESTURE_DETECTOR);
   apzc->SetFrameMetrics(TestFrameMetrics());
   apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   apzc->UpdateZoomConstraints(ZoomConstraints(false, false, CSSToScreenScale(1.0), CSSToScreenScale(1.0)));
   int time = 0;
   nsEventStatus status = ApzcTap(apzc, 10, 10, time, 100, mcc.get());
   EXPECT_EQ(nsEventStatus_eIgnore, status);
   // This verifies that the single tap notification is sent after the
   // touchdown is fully processed. The ordering here is important.
   mcc->CheckHasDelayedTask();
   EXPECT_CALL(*mcc, HandleSingleTap(CSSPoint(10, 10), 0, apzc->GetGuid())).Times(1);
   mcc->RunDelayedTask();
   apzc->Destroy();
 }
 TEST_F(AsyncPanZoomControllerTester, MediumPress) {
   nsRefPtr<MockContentControllerDelayed> mcc = new NiceMock<MockContentControllerDelayed>();
   nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(
 , mcc, tm, AsyncPanZoomController::USE_GESTURE_DETECTOR);
   apzc->SetFrameMetrics(TestFrameMetrics());
   apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   apzc->UpdateZoomConstraints(ZoomConstraints(false, false, CSSToScreenScale(1.0), CSSToScreenScale(1.0)));
   int time = 0;
   nsEventStatus status = ApzcTap(apzc, 10, 10, time, 400, mcc.get());
   EXPECT_EQ(nsEventStatus_eIgnore, status);
   // This verifies that the single tap notification is sent after the
   // touchdown is fully processed. The ordering here is important.
   mcc->CheckHasDelayedTask();
   EXPECT_CALL(*mcc, HandleSingleTap(CSSPoint(10, 10), 0, apzc->GetGuid())).Times(1);
   mcc->RunDelayedTask();
   apzc->Destroy();
 }
 void
 DoLongPressTest(bool aShouldUseTouchAction, uint32_t aBehavior) {
   nsRefPtr<MockContentControllerDelayed> mcc = new MockContentControllerDelayed();
   nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(
 , mcc, tm, AsyncPanZoomController::USE_GESTURE_DETECTOR);
   apzc->SetFrameMetrics(TestFrameMetrics());
   apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   apzc->UpdateZoomConstraints(ZoomConstraints(false, false, CSSToScreenScale(1.0), CSSToScreenScale(1.0)));
   apzc->SetTouchActionEnabled(aShouldUseTouchAction);
   int time = 0;
   nsEventStatus status = ApzcDown(apzc, 10, 10, time);
   EXPECT_EQ(nsEventStatus_eConsumeNoDefault, status);
   // SetAllowedTouchBehavior() must be called after sending touch-start.
   nsTArray<uint32_t> allowedTouchBehaviors;
   allowedTouchBehaviors.AppendElement(aBehavior);
   apzc->SetAllowedTouchBehavior(allowedTouchBehaviors);
   MockFunction<void(std::string checkPointName)> check;
   {
     InSequence s;
     EXPECT_CALL(check, Call("preHandleLongTap"));
     EXPECT_CALL(*mcc, HandleLongTap(CSSPoint(10, 10), 0, apzc->GetGuid())).Times(1);
     EXPECT_CALL(check, Call("postHandleLongTap"));
     EXPECT_CALL(check, Call("preHandleLongTapUp"));
     EXPECT_CALL(*mcc, HandleLongTapUp(CSSPoint(10, 10), 0, apzc->GetGuid())).Times(1);
     EXPECT_CALL(check, Call("postHandleLongTapUp"));
   }
   mcc->CheckHasDelayedTask();
   // Manually invoke the longpress while the touch is currently down.
   check.Call("preHandleLongTap");
   mcc->RunDelayedTask();
   check.Call("postHandleLongTap");
   // Destroy pending MAX_TAP timeout task
   mcc->DestroyOldestTask();
   // There should be a TimeoutContentResponse task in the queue still
   // Clear the waiting-for-content timeout task, then send the signal that
   // content has handled this long tap. This takes the place of the
   // "contextmenu" event.
   mcc->CheckHasDelayedTask();
   mcc->ClearDelayedTask();
   apzc->ContentReceivedTouch(true);
   time += 1000;
   status = ApzcUp(apzc, 10, 10, time);
   EXPECT_EQ(nsEventStatus_eIgnore, status);
   // To get a LongTapUp event, we must kick APZC to flush its event queue. This
   // would normally happen if we had a (Tab|RenderFrame)(Parent|Child)
   // mechanism.
   check.Call("preHandleLongTapUp");
   apzc->ContentReceivedTouch(false);
   check.Call("postHandleLongTapUp");
   apzc->Destroy();
 }
 void
 DoLongPressPreventDefaultTest(bool aShouldUseTouchAction, uint32_t aBehavior) {
   // We have to initialize both an integer time and TimeStamp time because
   // TimeStamp doesn't have any ToXXX() functions for converting back to
   // primitives.
   TimeStamp testStartTime = TimeStamp::Now();
   int time = 0;
   AsyncPanZoomController::SetFrameTime(testStartTime);
   nsRefPtr<MockContentControllerDelayed> mcc = new MockContentControllerDelayed();
   nsRefPtr<TestAPZCTreeManager> tm = new TestAPZCTreeManager();
   nsRefPtr<TestAsyncPanZoomController> apzc = new TestAsyncPanZoomController(
 , mcc, tm, AsyncPanZoomController::USE_GESTURE_DETECTOR);
   apzc->SetFrameMetrics(TestFrameMetrics());
   apzc->NotifyLayersUpdated(TestFrameMetrics(), true);
   apzc->UpdateZoomConstraints(ZoomConstraints(false, false, CSSToScreenScale(1.0), CSSToScreenScale(1.0)));
   apzc->SetTouchActionEnabled(aShouldUseTouchAction);
   EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(0);
   EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(0);
   int touchX = 10,
       touchStartY = 10,
       touchEndY = 50;
   nsEventStatus status = ApzcDown(apzc, touchX, touchStartY, time);
   EXPECT_EQ(nsEventStatus_eConsumeNoDefault, status);
   // SetAllowedTouchBehavior() must be called after sending touch-start.
   nsTArray<uint32_t> allowedTouchBehaviors;
   allowedTouchBehaviors.AppendElement(aBehavior);
   apzc->SetAllowedTouchBehavior(allowedTouchBehaviors);
   MockFunction<void(std::string checkPointName)> check;
   {
     InSequence s;
     EXPECT_CALL(check, Call("preHandleLongTap"));
     EXPECT_CALL(*mcc, HandleLongTap(CSSPoint(touchX, touchStartY), 0, apzc->GetGuid())).Times(1);
     EXPECT_CALL(check, Call("postHandleLongTap"));
   }
   mcc->CheckHasDelayedTask();
   // Manually invoke the longpress while the touch is currently down.
   check.Call("preHandleLongTap");
   mcc->RunDelayedTask();
   check.Call("postHandleLongTap");
   // Destroy pending MAX_TAP timeout task
   mcc->DestroyOldestTask();
   // Clear the waiting-for-content timeout task, then send the signal that
   // content has handled this long tap. This takes the place of the
   // "contextmenu" event.
   mcc->ClearDelayedTask();
   apzc->ContentReceivedTouch(true);
   time += 1000;
   MultiTouchInput mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, time, 0);
   mti.mTouches.AppendElement(SingleTouchData(0, ScreenIntPoint(touchX, touchEndY), ScreenSize(0, 0), 0, 0));
   status = apzc->ReceiveInputEvent(mti);
   EXPECT_EQ(nsEventStatus_eIgnore, status);
   EXPECT_CALL(*mcc, HandleLongTapUp(CSSPoint(touchX, touchEndY), 0, apzc->GetGuid())).Times(1);
   status = ApzcUp(apzc, touchX, touchEndY, time);
   EXPECT_EQ(nsEventStatus_eIgnore, status);
   // Flush the event queue. Once the "contextmenu" event is handled, any touch
   // events that come from the same series of start->n*move->end events should
   // be discarded, even if only the "contextmenu" event is preventDefaulted.
   apzc->ContentReceivedTouch(false);
   ScreenPoint pointOut;
   ViewTransform viewTransformOut;
   apzc->SampleContentTransformForFrame(testStartTime, &viewTransformOut, pointOut);
   EXPECT_EQ(ScreenPoint(), pointOut);
   EXPECT_EQ(ViewTransform(), viewTransformOut);
   apzc->Destroy();
 }
 TEST_F(AsyncPanZoomControllerTester, LongPress) {
   DoLongPressTest(false, mozilla::layers::AllowedTouchBehavior::NONE);
 }
 TEST_F(AsyncPanZoomControllerTester, LongPressWithTouchAction) {
   DoLongPressTest(true, mozilla::layers::AllowedTouchBehavior::HORIZONTAL_PAN
                       | mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN
                       | mozilla::layers::AllowedTouchBehavior::PINCH_ZOOM);
 }
 TEST_F(AsyncPanZoomControllerTester, LongPressPreventDefault) {
   DoLongPressPreventDefaultTest(false, mozilla::layers::AllowedTouchBehavior::NONE);
 }
 TEST_F(AsyncPanZoomControllerTester, LongPressPreventDefaultWithTouchAction) {
   DoLongPressPreventDefaultTest(true, mozilla::layers::AllowedTouchBehavior::HORIZONTAL_PAN
                                     | mozilla::layers::AllowedTouchBehavior::VERTICAL_PAN
                                     | mozilla::layers::AllowedTouchBehavior::PINCH_ZOOM);
 }
 // Layer tree for HitTesting1
 static already_AddRefed<mozilla::layers::Layer>
 CreateTestLayerTree1(nsRefPtr<LayerManager>& aLayerManager, nsTArray<nsRefPtr<Layer> >& aLayers) {
   const char* layerTreeSyntax = "c(ttcc)";
   // LayerID                     0 1234
   nsIntRegion layerVisibleRegion[] = {
     nsIntRegion(nsIntRect(0,0,100,100)),
     nsIntRegion(nsIntRect(0,0,100,100)),
     nsIntRegion(nsIntRect(10,10,20,20)),
     nsIntRegion(nsIntRect(10,10,20,20)),
     nsIntRegion(nsIntRect(5,5,20,20)),
   };
   gfx3DMatrix transforms[] = {
     gfx3DMatrix(),
     gfx3DMatrix(),
     gfx3DMatrix(),
     gfx3DMatrix(),
     gfx3DMatrix(),
   };
   return CreateLayerTree(layerTreeSyntax, layerVisibleRegion, transforms, aLayerManager, aLayers);
 }
 // Layer Tree for HitTesting2
 static already_AddRefed<mozilla::layers::Layer>
 CreateTestLayerTree2(nsRefPtr<LayerManager>& aLayerManager, nsTArray<nsRefPtr<Layer> >& aLayers) {
   const char* layerTreeSyntax = "c(cc(c))";
   // LayerID                     0 12 3
   nsIntRegion layerVisibleRegion[] = {
     nsIntRegion(nsIntRect(0,0,100,100)),
     nsIntRegion(nsIntRect(10,10,40,40)),
     nsIntRegion(nsIntRect(10,60,40,40)),
     nsIntRegion(nsIntRect(10,60,40,40)),
   };
   gfx3DMatrix transforms[] = {
     gfx3DMatrix(),
     gfx3DMatrix(),
     gfx3DMatrix(),
     gfx3DMatrix(),
   };
   return CreateLayerTree(layerTreeSyntax, layerVisibleRegion, transforms, aLayerManager, aLayers);
 }
 static void
 SetScrollableFrameMetrics(Layer* aLayer, FrameMetrics::ViewID aScrollId,
                           // The scrollable rect is only used in HitTesting2,
                           // HitTesting1 doesn't care about it.
                           CSSRect aScrollableRect = CSSRect(-1, -1, -1, -1))
 {
   ContainerLayer* container = aLayer->AsContainerLayer();
   FrameMetrics metrics;
   metrics.SetScrollId(aScrollId);
   nsIntRect layerBound = aLayer->GetVisibleRegion().GetBounds();
   metrics.mCompositionBounds = ParentLayerIntRect(layerBound.x, layerBound.y,
                                                   layerBound.width, layerBound.height);
   metrics.mScrollableRect = aScrollableRect;
   metrics.SetScrollOffset(CSSPoint(0, 0));
   container->SetFrameMetrics(metrics);
 }
 static already_AddRefed<AsyncPanZoomController>
 GetTargetAPZC(APZCTreeManager* manager, const ScreenPoint& aPoint,
               gfx3DMatrix& aTransformToApzcOut, gfx3DMatrix& aTransformToGeckoOut)
 {
   nsRefPtr<AsyncPanZoomController> hit = manager->GetTargetAPZC(aPoint);
   if (hit) {
     manager->GetInputTransforms(hit.get(), aTransformToApzcOut, aTransformToGeckoOut);
   }
   return hit.forget();
 }
 // A simple hit testing test that doesn't involve any transforms on layers.
 TEST_F(APZCTreeManagerTester, HitTesting1) {
   nsTArray<nsRefPtr<Layer> > layers;
   nsRefPtr<LayerManager> lm;
   nsRefPtr<Layer> root = CreateTestLayerTree1(lm, layers);
   TimeStamp testStartTime = TimeStamp::Now();
   AsyncPanZoomController::SetFrameTime(testStartTime);
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   ScopedLayerTreeRegistration controller(0, root, mcc);
   nsRefPtr<APZCTreeManager> manager = new TestAPZCTreeManager();
   gfx3DMatrix transformToApzc;
   gfx3DMatrix transformToGecko;
   // No APZC attached so hit testing will return no APZC at (20,20)
   nsRefPtr<AsyncPanZoomController> hit = GetTargetAPZC(manager, ScreenPoint(20, 20), transformToApzc, transformToGecko);
   AsyncPanZoomController* nullAPZC = nullptr;
   EXPECT_EQ(nullAPZC, hit.get());
   EXPECT_EQ(gfx3DMatrix(), transformToApzc);
   EXPECT_EQ(gfx3DMatrix(), transformToGecko);
   // Now we have a root APZC that will match the page
   SetScrollableFrameMetrics(root, FrameMetrics::START_SCROLL_ID);
   manager->UpdatePanZoomControllerTree(nullptr, root, false, 0);
   hit = GetTargetAPZC(manager, ScreenPoint(15, 15), transformToApzc, transformToGecko);
   EXPECT_EQ(root->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
   // expect hit point at LayerIntPoint(15, 15)
   EXPECT_EQ(gfxPoint(15, 15), transformToApzc.Transform(gfxPoint(15, 15)));
   EXPECT_EQ(gfxPoint(15, 15), transformToGecko.Transform(gfxPoint(15, 15)));
   // Now we have a sub APZC with a better fit
   SetScrollableFrameMetrics(layers[3], FrameMetrics::START_SCROLL_ID + 1);
   manager->UpdatePanZoomControllerTree(nullptr, root, false, 0);
   EXPECT_NE(root->AsContainerLayer()->GetAsyncPanZoomController(), layers[3]->AsContainerLayer()->GetAsyncPanZoomController());
   hit = GetTargetAPZC(manager, ScreenPoint(15, 15), transformToApzc, transformToGecko);
   EXPECT_EQ(layers[3]->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
   // expect hit point at LayerIntPoint(15, 15)
   EXPECT_EQ(gfxPoint(15, 15), transformToApzc.Transform(gfxPoint(15, 15)));
   EXPECT_EQ(gfxPoint(15, 15), transformToGecko.Transform(gfxPoint(15, 15)));
   // Now test hit testing when we have two scrollable layers
   hit = GetTargetAPZC(manager, ScreenPoint(15, 15), transformToApzc, transformToGecko);
   EXPECT_EQ(layers[3]->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
   SetScrollableFrameMetrics(layers[4], FrameMetrics::START_SCROLL_ID + 2);
   manager->UpdatePanZoomControllerTree(nullptr, root, false, 0);
   hit = GetTargetAPZC(manager, ScreenPoint(15, 15), transformToApzc, transformToGecko);
   EXPECT_EQ(layers[4]->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
   // expect hit point at LayerIntPoint(15, 15)
   EXPECT_EQ(gfxPoint(15, 15), transformToApzc.Transform(gfxPoint(15, 15)));
   EXPECT_EQ(gfxPoint(15, 15), transformToGecko.Transform(gfxPoint(15, 15)));
   // Hit test ouside the reach of layer[3,4] but inside root
   hit = GetTargetAPZC(manager, ScreenPoint(90, 90), transformToApzc, transformToGecko);
   EXPECT_EQ(root->AsContainerLayer()->GetAsyncPanZoomController(), hit.get());
   // expect hit point at LayerIntPoint(90, 90)
   EXPECT_EQ(gfxPoint(90, 90), transformToApzc.Transform(gfxPoint(90, 90)));
   EXPECT_EQ(gfxPoint(90, 90), transformToGecko.Transform(gfxPoint(90, 90)));
   // Hit test ouside the reach of any layer
   hit = GetTargetAPZC(manager, ScreenPoint(1000, 10), transformToApzc, transformToGecko);
   EXPECT_EQ(nullAPZC, hit.get());
   EXPECT_EQ(gfx3DMatrix(), transformToApzc);
   EXPECT_EQ(gfx3DMatrix(), transformToGecko);
   hit = GetTargetAPZC(manager, ScreenPoint(-1000, 10), transformToApzc, transformToGecko);
   EXPECT_EQ(nullAPZC, hit.get());
   EXPECT_EQ(gfx3DMatrix(), transformToApzc);
   EXPECT_EQ(gfx3DMatrix(), transformToGecko);
   manager->ClearTree();
 }
 // A more involved hit testing test that involves css and async transforms.
 TEST_F(APZCTreeManagerTester, HitTesting2) {
   nsTArray<nsRefPtr<Layer> > layers;
   nsRefPtr<LayerManager> lm;
   nsRefPtr<Layer> root = CreateTestLayerTree2(lm, layers);
   TimeStamp testStartTime = TimeStamp::Now();
   AsyncPanZoomController::SetFrameTime(testStartTime);
   nsRefPtr<MockContentController> mcc = new NiceMock<MockContentController>();
   ScopedLayerTreeRegistration controller(0, root, mcc);
   nsRefPtr<TestAPZCTreeManager> manager = new TestAPZCTreeManager();
   nsRefPtr<AsyncPanZoomController> hit;
   gfx3DMatrix transformToApzc;
   gfx3DMatrix transformToGecko;
   // Set a CSS transform on one of the layers.
   Matrix4x4 transform;
   transform = transform * Matrix4x4().Scale(2, 1, 1);
   layers[2]->SetBaseTransform(transform);
   // Make some other layers scrollable.
   SetScrollableFrameMetrics(root, FrameMetrics::START_SCROLL_ID, CSSRect(0, 0, 200, 200));
   SetScrollableFrameMetrics(layers[1], FrameMetrics::START_SCROLL_ID + 1, CSSRect(0, 0, 80, 80));
   SetScrollableFrameMetrics(layers[3], FrameMetrics::START_SCROLL_ID + 2, CSSRect(0, 0, 80, 80));
   manager->UpdatePanZoomControllerTree(nullptr, root, false, 0);
   // At this point, the following holds (all coordinates in screen pixels):
   // layers[0] has content from (0,0)-(200,200), clipped by composition bounds (0,0)-(100,100)
   // layers[1] has content from (10,10)-(90,90), clipped by composition bounds (10,10)-(50,50)
   // layers[2] has content from (20,60)-(100,100). no clipping as it's not a scrollable layer
   // layers[3] has content from (20,60)-(180,140), clipped by composition bounds (20,60)-(100,100)
   AsyncPanZoomController* apzcroot = root->AsContainerLayer()->GetAsyncPanZoomController();
   AsyncPanZoomController* apzc1 = layers[1]->AsContainerLayer()->GetAsyncPanZoomController();
   AsyncPanZoomController* apzc3 = layers[3]->AsContainerLayer()->GetAsyncPanZoomController();
   // Hit an area that's clearly on the root layer but not any of the child layers.
   hit = GetTargetAPZC(manager, ScreenPoint(75, 25), transformToApzc, transformToGecko);
   EXPECT_EQ(apzcroot, hit.get());
   EXPECT_EQ(gfxPoint(75, 25), transformToApzc.Transform(gfxPoint(75, 25)));
   EXPECT_EQ(gfxPoint(75, 25), transformToGecko.Transform(gfxPoint(75, 25)));
   // Hit an area on the root that would be on layers[3] if layers[2]
   // weren't transformed.
   // Note that if layers[2] were scrollable, then this would hit layers[2]
   // because its composition bounds would be at (10,60)-(50,100) (and the
   // scale-only transform that we set on layers[2] would be invalid because
   // it would place the layer into overscroll, as its composition bounds
   // start at x=10 but its content at x=20).
   hit = GetTargetAPZC(manager, ScreenPoint(15, 75), transformToApzc, transformToGecko);
   EXPECT_EQ(apzcroot, hit.get());
   EXPECT_EQ(gfxPoint(15, 75), transformToApzc.Transform(gfxPoint(15, 75)));
   EXPECT_EQ(gfxPoint(15, 75), transformToGecko.Transform(gfxPoint(15, 75)));
   // Hit an area on layers[1].
   hit = GetTargetAPZC(manager, ScreenPoint(25, 25), transformToApzc, transformToGecko);
   EXPECT_EQ(apzc1, hit.get());
   EXPECT_EQ(gfxPoint(25, 25), transformToApzc.Transform(gfxPoint(25, 25)));
   EXPECT_EQ(gfxPoint(25, 25), transformToGecko.Transform(gfxPoint(25, 25)));
   // Hit an area on layers[3].
   hit = GetTargetAPZC(manager, ScreenPoint(25, 75), transformToApzc, transformToGecko);
   EXPECT_EQ(apzc3, hit.get());
   // transformToApzc should unapply layers[2]'s transform
   EXPECT_EQ(gfxPoint(12.5, 75), transformToApzc.Transform(gfxPoint(25, 75)));
   // and transformToGecko should reapply it
   EXPECT_EQ(gfxPoint(25, 75), transformToGecko.Transform(gfxPoint(12.5, 75)));
   // Hit an area on layers[3] that would be on the root if layers[2]
   // weren't transformed.
   hit = GetTargetAPZC(manager, ScreenPoint(75, 75), transformToApzc, transformToGecko);
   EXPECT_EQ(apzc3, hit.get());
   // transformToApzc should unapply layers[2]'s transform
   EXPECT_EQ(gfxPoint(37.5, 75), transformToApzc.Transform(gfxPoint(75, 75)));
   // and transformToGecko should reapply it
   EXPECT_EQ(gfxPoint(75, 75), transformToGecko.Transform(gfxPoint(37.5, 75)));
   // Pan the root layer upward by 50 pixels.
   // This causes layers[1] to scroll out of view, and an async transform
   // of -50 to be set on the root layer.
   int time = 0;
   // Silence GMock warnings about "uninteresting mock function calls".
   EXPECT_CALL(*mcc, PostDelayedTask(_,_)).Times(AtLeast(1));
   EXPECT_CALL(*mcc, SendAsyncScrollDOMEvent(_,_,_)).Times(AtLeast(1));
   EXPECT_CALL(*mcc, RequestContentRepaint(_)).Times(1);
   // This first pan will move the APZC by 50 pixels, and dispatch a paint request.
   // Since this paint request is in the queue to Gecko, transformToGecko will
   // take it into account.
   ApzcPan(apzcroot, manager, time, 100, 50);
   // Hit where layers[3] used to be. It should now hit the root.
   hit = GetTargetAPZC(manager, ScreenPoint(75, 75), transformToApzc, transformToGecko);
   EXPECT_EQ(apzcroot, hit.get());
   // transformToApzc doesn't unapply the root's own async transform
   EXPECT_EQ(gfxPoint(75, 75), transformToApzc.Transform(gfxPoint(75, 75)));
   // and transformToGecko unapplies it and then reapplies it, because by the
   // time the event being transformed reaches Gecko the new paint request will
   // have been handled.
   EXPECT_EQ(gfxPoint(75, 75), transformToGecko.Transform(gfxPoint(75, 75)));
   // Hit where layers[1] used to be and where layers[3] should now be.
   hit = GetTargetAPZC(manager, ScreenPoint(25, 25), transformToApzc, transformToGecko);
   EXPECT_EQ(apzc3, hit.get());
   // transformToApzc unapplies both layers[2]'s css transform and the root's
   // async transform
   EXPECT_EQ(gfxPoint(12.5, 75), transformToApzc.Transform(gfxPoint(25, 25)));
   // transformToGecko reapplies both the css transform and the async transform
   // because we have already issued a paint request with it.
   EXPECT_EQ(gfxPoint(25, 25), transformToGecko.Transform(gfxPoint(12.5, 75)));
   // This second pan will move the APZC by another 50 pixels but since the paint
   // request dispatched above has not "completed", we will not dispatch another
   // one yet. Now we have an async transform on top of the pending paint request
   // transform.
   ApzcPan(apzcroot, manager, time, 100, 50);
   // Hit where layers[3] used to be. It should now hit the root.
   hit = GetTargetAPZC(manager, ScreenPoint(75, 75), transformToApzc, transformToGecko);
   EXPECT_EQ(apzcroot, hit.get());
   // transformToApzc doesn't unapply the root's own async transform
   EXPECT_EQ(gfxPoint(75, 75), transformToApzc.Transform(gfxPoint(75, 75)));
   // transformToGecko unapplies the full async transform of -100 pixels, and then
   // reapplies the "D" transform of -50 leading to an overall adjustment of +50
   EXPECT_EQ(gfxPoint(75, 125), transformToGecko.Transform(gfxPoint(75, 75)));
   // Hit where layers[1] used to be. It should now hit the root.
   hit = GetTargetAPZC(manager, ScreenPoint(25, 25), transformToApzc, transformToGecko);
   EXPECT_EQ(apzcroot, hit.get());
   // transformToApzc doesn't unapply the root's own async transform
   EXPECT_EQ(gfxPoint(25, 25), transformToApzc.Transform(gfxPoint(25, 25)));
   // transformToGecko unapplies the full async transform of -100 pixels, and then
   // reapplies the "D" transform of -50 leading to an overall adjustment of +50
   EXPECT_EQ(gfxPoint(25, 75), transformToGecko.Transform(gfxPoint(25, 25)));
   manager->ClearTree();
 }

The Tor Browser / annotate

gfx/tests/gtest/TestAsyncPanZoomController.cpp@6474c204b198 (annotated)

gfx/tests/gtest/TestAsyncPanZoomController.cpp