TestInputQueue.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "APZCTreeManagerTester.h"

#include "APZTestCommon.h"

#include "InputUtils.h"

#include "mozilla/layers/ScrollableLayerGuid.h"

// Test of scenario described in bug 1269067 - that a continuing mouse drag

// doesn't interrupt a wheel scrolling animation

TEST_F(APZCTreeManagerTester, WheelInterruptedByMouseDrag) {

  // Needed because the test uses SmoothWheel()

  SCOPED_GFX_PREF_BOOL("general.smoothScroll", true);

  // Set up a scrollable layer

  CreateSimpleScrollingLayer();

  ScopedLayerTreeRegistration registration(LayersId{0}, mcc);

  UpdateHitTestingTree();

  RefPtr<TestAsyncPanZoomController> apzc = ApzcOf(root);

  // First start the mouse drag

  uint64_t dragBlockId =

      MouseDown(apzc, ScreenIntPoint(5, 5), mcc->Time()).mInputBlockId;

  uint64_t tmpBlockId =

      MouseMove(apzc, ScreenIntPoint(6, 6), mcc->Time()).mInputBlockId;

  EXPECT_EQ(dragBlockId, tmpBlockId);

  // Insert the wheel event, check that it has a new block id

  uint64_t wheelBlockId =

      SmoothWheel(apzc, ScreenIntPoint(6, 6), ScreenPoint(0, 1), mcc->Time())

          .mInputBlockId;

  EXPECT_NE(dragBlockId, wheelBlockId);

  // Continue the drag, check that the block id is the same as before

  tmpBlockId = MouseMove(apzc, ScreenIntPoint(7, 5), mcc->Time()).mInputBlockId;

  EXPECT_EQ(dragBlockId, tmpBlockId);

  // Finish the wheel animation

  apzc->AdvanceAnimationsUntilEnd();

  // Check that it scrolled

  ParentLayerPoint scroll = apzc->GetCurrentAsyncScrollOffset(

      AsyncPanZoomController::eForEventHandling);

  EXPECT_EQ(scroll.x, 0);

  EXPECT_EQ(scroll.y, 10);  // We scrolled 1 "line" or 10 pixels

// Test of the scenario in bug 1894228, where the touchpad generates a

// mixture of wheel events with horizontal and vertical deltas, and if the

// content is only scrollable in the vertical direction, then an input

// block starting with a wheel event with a horizontal can prevent the

// entire input block from causing any scrolling.

TEST_F(APZCTreeManagerTester, HorizontalDeltaInterferesWithVerticalScrolling) {

  using ViewID = ScrollableLayerGuid::ViewID;

  ViewID rootScrollId = ScrollableLayerGuid::START_SCROLL_ID;

  const char* treeShape = "x";

  LayerIntRect layerVisibleRect[] = {

      LayerIntRect(0, 0, 100, 100),

};

  CreateScrollData(treeShape, layerVisibleRect);

  // Only vertically scrollable

  SetScrollableFrameMetrics(layers[0], rootScrollId, CSSRect(0, 0, 100, 1000));

  ScopedLayerTreeRegistration registration(LayersId{0}, mcc);

  UpdateHitTestingTree();

  RefPtr<TestAsyncPanZoomController> apzc = ApzcOf(root);

  // Configure the APZC to wait for main-thread confirmations before

  // processing events. (This is needed to trigger the buggy codepath.)

  apzc->SetWaitForMainThread();

  // Send a wheel event with a horizontal delta.

  ScreenIntPoint cursorLocation(50, 50);

  uint64_t wheelBlockId1 =

      Wheel(apzc, cursorLocation, ScreenIntPoint(-10, 0), mcc->Time())

          .mInputBlockId;

  // Send a wheel event with a vertical delta.

  uint64_t wheelBlockId2 =

      Wheel(apzc, cursorLocation, ScreenIntPoint(0, 10), mcc->Time())

          .mInputBlockId;

  // Since the wheel block's target APZC has not been confirmed yet, the second

  // event will go into the same block as the first.

  EXPECT_EQ(wheelBlockId1, wheelBlockId2);

  // Confirm the input block.

  manager->ContentReceivedInputBlock(wheelBlockId1, false);

  manager->SetTargetAPZC(wheelBlockId1, {apzc->GetGuid()});

  // We should have scrolled vertically.

  EXPECT_EQ(ParentLayerPoint(0, 10),

            apzc->GetCurrentAsyncScrollOffset(

                AsyncPanZoomController::eForEventHandling));