void InputBlockState::UpdateTargetApzc(const RefPtr<AsyncPanZoomController>& aTargetApzc) { // note that aTargetApzc MAY be null here. mTargetApzc = aTargetApzc; mTransformToApzc = aTargetApzc ? aTargetApzc->GetTransformToThis() : ScreenToParentLayerMatrix4x4(); mOverscrollHandoffChain = (mTargetApzc ? mTargetApzc->BuildOverscrollHandoffChain() : nullptr); }
// A simple hit testing test that doesn't involve any transforms on layers. TEST_F(APZHitTestingTester, HitTesting1) { CreateHitTesting1LayerTree(); ScopedLayerTreeRegistration registration(manager, 0, root, mcc); // No APZC attached so hit testing will return no APZC at (20,20) RefPtr<AsyncPanZoomController> hit = GetTargetAPZC(ScreenPoint(20, 20)); TestAsyncPanZoomController* nullAPZC = nullptr; EXPECT_EQ(nullAPZC, hit.get()); EXPECT_EQ(ScreenToParentLayerMatrix4x4(), transformToApzc); EXPECT_EQ(ParentLayerToScreenMatrix4x4(), transformToGecko); uint32_t paintSequenceNumber = 0; // Now we have a root APZC that will match the page SetScrollableFrameMetrics(root, FrameMetrics::START_SCROLL_ID); manager->UpdateHitTestingTree(nullptr, root, false, 0, paintSequenceNumber++); hit = GetTargetAPZC(ScreenPoint(15, 15)); EXPECT_EQ(ApzcOf(root), hit.get()); // expect hit point at LayerIntPoint(15, 15) EXPECT_EQ(ParentLayerPoint(15, 15), transformToApzc * ScreenPoint(15, 15)); EXPECT_EQ(ScreenPoint(15, 15), transformToGecko * ParentLayerPoint(15, 15)); // Now we have a sub APZC with a better fit SetScrollableFrameMetrics(layers[3], FrameMetrics::START_SCROLL_ID + 1); manager->UpdateHitTestingTree(nullptr, root, false, 0, paintSequenceNumber++); EXPECT_NE(ApzcOf(root), ApzcOf(layers[3])); hit = GetTargetAPZC(ScreenPoint(25, 25)); EXPECT_EQ(ApzcOf(layers[3]), hit.get()); // expect hit point at LayerIntPoint(25, 25) EXPECT_EQ(ParentLayerPoint(25, 25), transformToApzc * ScreenPoint(25, 25)); EXPECT_EQ(ScreenPoint(25, 25), transformToGecko * ParentLayerPoint(25, 25)); // At this point, layers[4] obscures layers[3] at the point (15, 15) so // hitting there should hit the root APZC hit = GetTargetAPZC(ScreenPoint(15, 15)); EXPECT_EQ(ApzcOf(root), hit.get()); // Now test hit testing when we have two scrollable layers SetScrollableFrameMetrics(layers[4], FrameMetrics::START_SCROLL_ID + 2); manager->UpdateHitTestingTree(nullptr, root, false, 0, paintSequenceNumber++); hit = GetTargetAPZC(ScreenPoint(15, 15)); EXPECT_EQ(ApzcOf(layers[4]), hit.get()); // expect hit point at LayerIntPoint(15, 15) EXPECT_EQ(ParentLayerPoint(15, 15), transformToApzc * ScreenPoint(15, 15)); EXPECT_EQ(ScreenPoint(15, 15), transformToGecko * ParentLayerPoint(15, 15)); // Hit test ouside the reach of layer[3,4] but inside root hit = GetTargetAPZC(ScreenPoint(90, 90)); EXPECT_EQ(ApzcOf(root), hit.get()); // expect hit point at LayerIntPoint(90, 90) EXPECT_EQ(ParentLayerPoint(90, 90), transformToApzc * ScreenPoint(90, 90)); EXPECT_EQ(ScreenPoint(90, 90), transformToGecko * ParentLayerPoint(90, 90)); // Hit test ouside the reach of any layer hit = GetTargetAPZC(ScreenPoint(1000, 10)); EXPECT_EQ(nullAPZC, hit.get()); EXPECT_EQ(ScreenToParentLayerMatrix4x4(), transformToApzc); EXPECT_EQ(ParentLayerToScreenMatrix4x4(), transformToGecko); hit = GetTargetAPZC(ScreenPoint(-1000, 10)); EXPECT_EQ(nullAPZC, hit.get()); EXPECT_EQ(ScreenToParentLayerMatrix4x4(), transformToApzc); EXPECT_EQ(ParentLayerToScreenMatrix4x4(), transformToGecko); }