/* -*- 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"

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

// doesn't interrupt a wheel scrolling animation

TEST_F(APZCTreeManagerTester, WheelInterruptedByMouseDrag) {

  // Set up a scrollable layer

  CreateSimpleScrollingLayer();

  ScopedLayerTreeRegistration registration(manager, LayersId{0}, root, mcc);

  manager->UpdateHitTestingTree(LayersId{0}, root, false, LayersId{0}, 0);

  RefPtr<TestAsyncPanZoomController> apzc = ApzcOf(root);

  uint64_t dragBlockId = 0;

  uint64_t wheelBlockId = 0;

  uint64_t tmpBlockId = 0;

  // First start the mouse drag

  MouseDown(apzc, ScreenIntPoint(5, 5), mcc->Time(), &dragBlockId);

  MouseMove(apzc, ScreenIntPoint(6, 6), mcc->Time(), &tmpBlockId);

  EXPECT_EQ(dragBlockId, tmpBlockId);

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

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

  EXPECT_NE(dragBlockId, wheelBlockId);

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

  MouseMove(apzc, ScreenIntPoint(7, 5), mcc->Time(), &tmpBlockId);

  EXPECT_EQ(dragBlockId, tmpBlockId);

  // Finish the wheel animation

  apzc->AdvanceAnimationsUntilEnd();

  // Check that it scrolled

  ParentLayerPoint scroll = apzc->GetCurrentAsyncScrollOffset(AsyncPanZoomController::eForHitTesting);

  EXPECT_EQ(scroll.x, 0);

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

}