text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "ui/aura/window_event_dispatcher.h"
  
  #include <stddef.h>
  
  #include <utility>
  #include <vector>
  
  #include "base/bind.h"
  #include "base/macros.h"
  #include "base/run_loop.h"
  #include "base/single_thread_task_runner.h"
  #include "base/threading/thread_task_runner_handle.h"
  #include "build/build_config.h"
  #include "testing/gtest/include/gtest/gtest.h"
  #include "ui/aura/client/capture_client.h"
  #include "ui/aura/client/event_client.h"
  #include "ui/aura/client/focus_client.h"
  #include "ui/aura/env.h"
  #include "ui/aura/test/aura_test_base.h"
  #include "ui/aura/test/env_test_helper.h"
  #include "ui/aura/test/test_cursor_client.h"
  #include "ui/aura/test/test_screen.h"
  #include "ui/aura/test/test_window_delegate.h"
  #include "ui/aura/test/test_windows.h"
  #include "ui/aura/window.h"
  #include "ui/aura/window_tracker.h"
  #include "ui/base/hit_test.h"
  #include "ui/display/screen.h"
  #include "ui/events/event.h"
  #include "ui/events/event_handler.h"
  #include "ui/events/event_utils.h"
  #include "ui/events/gesture_detection/gesture_configuration.h"
  #include "ui/events/keycodes/keyboard_codes.h"
  #include "ui/events/test/event_generator.h"
  #include "ui/events/test/test_event_handler.h"
  #include "ui/gfx/geometry/point.h"
  #include "ui/gfx/geometry/rect.h"
  #include "ui/gfx/transform.h"
  
  namespace aura {
  namespace {
  
  // A delegate that always returns a non-client component for hit tests.
  class NonClientDelegate : public test::TestWindowDelegate {
   public:
    NonClientDelegate()
        : non_client_count_(0),
          mouse_event_count_(0),
          mouse_event_flags_(0x0) {
    }
    ~NonClientDelegate() override {}
  
    int non_client_count() const { return non_client_count_; }
    gfx::Point non_client_location() const { return non_client_location_; }
    int mouse_event_count() const { return mouse_event_count_; }
    gfx::Point mouse_event_location() const { return mouse_event_location_; }
    int mouse_event_flags() const { return mouse_event_flags_; }
  
    int GetNonClientComponent(const gfx::Point& location) const override {
      NonClientDelegate* self = const_cast<NonClientDelegate*>(this);
      self->non_client_count_++;
      self->non_client_location_ = location;
      return HTTOPLEFT;
    }
    void OnMouseEvent(ui::MouseEvent* event) override {
      mouse_event_count_++;
      mouse_event_location_ = event->location();
      mouse_event_flags_ = event->flags();
      event->SetHandled();
    }
  
   private:
    int non_client_count_;
    gfx::Point non_client_location_;
    int mouse_event_count_;
    gfx::Point mouse_event_location_;
    int mouse_event_flags_;
  
    DISALLOW_COPY_AND_ASSIGN(NonClientDelegate);
  };
  
  // A simple event handler that consumes key events.
  class ConsumeKeyHandler : public ui::test::TestEventHandler {
   public:
    ConsumeKeyHandler() {}
    ~ConsumeKeyHandler() override {}
  
    // Overridden from ui::EventHandler:
    void OnKeyEvent(ui::KeyEvent* event) override {
      ui::test::TestEventHandler::OnKeyEvent(event);
      event->StopPropagation();
    }
  
   private:
    DISALLOW_COPY_AND_ASSIGN(ConsumeKeyHandler);
  };
  
  bool IsFocusedWindow(aura::Window* window) {
    return client::GetFocusClient(window)->GetFocusedWindow() == window;
  }
  
  }  // namespace
  
  using WindowEventDispatcherTest = test::AuraTestBaseWithType;
  
  TEST_P(WindowEventDispatcherTest, OnHostMouseEvent) {
    // Create two non-overlapping windows so we don't have to worry about which
    // is on top.
    std::unique_ptr<NonClientDelegate> delegate1(new NonClientDelegate());
    std::unique_ptr<NonClientDelegate> delegate2(new NonClientDelegate());
    const int kWindowWidth = 123;
    const int kWindowHeight = 45;
    gfx::Rect bounds1(100, 200, kWindowWidth, kWindowHeight);
    gfx::Rect bounds2(300, 400, kWindowWidth, kWindowHeight);
    std::unique_ptr<aura::Window> window1(CreateTestWindowWithDelegate(
        delegate1.get(), -1234, bounds1, root_window()));
    std::unique_ptr<aura::Window> window2(CreateTestWindowWithDelegate(
        delegate2.get(), -5678, bounds2, root_window()));
  
    // Send a mouse event to window1.
    gfx::Point point(101, 201);
    ui::MouseEvent event1(ui::ET_MOUSE_PRESSED, point, point,
                          ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
                          ui::EF_LEFT_MOUSE_BUTTON);
    DispatchEventUsingWindowDispatcher(&event1);
  
    // Event was tested for non-client area for the target window.
    EXPECT_EQ(1, delegate1->non_client_count());
    EXPECT_EQ(0, delegate2->non_client_count());
    // The non-client component test was in local coordinates.
    EXPECT_EQ(gfx::Point(1, 1), delegate1->non_client_location());
    // Mouse event was received by target window.
    EXPECT_EQ(1, delegate1->mouse_event_count());
    EXPECT_EQ(0, delegate2->mouse_event_count());
    // Event was in local coordinates.
    EXPECT_EQ(gfx::Point(1, 1), delegate1->mouse_event_location());
    // Non-client flag was set.
    EXPECT_TRUE(delegate1->mouse_event_flags() & ui::EF_IS_NON_CLIENT);
  }
  
  TEST_P(WindowEventDispatcherTest, RepostEvent) {
    // Test RepostEvent in RootWindow. It only works for Mouse Press and touch
    // press.
    EXPECT_FALSE(Env::GetInstance()->IsMouseButtonDown());
    gfx::Point point(10, 10);
    ui::MouseEvent event(ui::ET_MOUSE_PRESSED, point, point,
                         ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
                         ui::EF_LEFT_MOUSE_BUTTON);
    host()->dispatcher()->RepostEvent(&event);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());
  
    ui::TouchEvent touch_pressed_event(
      ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 0, ui::EventTimeForNow());
    host()->dispatcher()->RepostEvent(&touch_pressed_event);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(Env::GetInstance()->is_touch_down());
  }
  
  // Check that we correctly track the state of the mouse buttons in response to
  // button press and release events.
  TEST_P(WindowEventDispatcherTest, MouseButtonState) {
    EXPECT_FALSE(Env::GetInstance()->IsMouseButtonDown());
  
    gfx::Point location;
    std::unique_ptr<ui::MouseEvent> event;
  
    // Press the left button.
    event.reset(new ui::MouseEvent(
        ui::ET_MOUSE_PRESSED, location, location, ui::EventTimeForNow(),
        ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());
  
    // Additionally press the right.
    event.reset(new ui::MouseEvent(
        ui::ET_MOUSE_PRESSED, location, location, ui::EventTimeForNow(),
        ui::EF_LEFT_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON,
        ui::EF_RIGHT_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());
  
    // Release the left button.
    event.reset(new ui::MouseEvent(
        ui::ET_MOUSE_RELEASED, location, location, ui::EventTimeForNow(),
        ui::EF_RIGHT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());
  
    // Release the right button.  We should ignore the Shift-is-down flag.
    event.reset(new ui::MouseEvent(ui::ET_MOUSE_RELEASED, location, location,
                                   ui::EventTimeForNow(), ui::EF_SHIFT_DOWN,
                                   ui::EF_RIGHT_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_FALSE(Env::GetInstance()->IsMouseButtonDown());
  
    // Press the middle button.
    event.reset(new ui::MouseEvent(
        ui::ET_MOUSE_PRESSED, location, location, ui::EventTimeForNow(),
        ui::EF_MIDDLE_MOUSE_BUTTON, ui::EF_MIDDLE_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());
  }
  
  TEST_P(WindowEventDispatcherTest, TranslatedEvent) {
    std::unique_ptr<Window> w1(test::CreateTestWindowWithDelegate(
        NULL, 1, gfx::Rect(50, 50, 100, 100), root_window()));
  
    gfx::Point origin(100, 100);
    ui::MouseEvent root(ui::ET_MOUSE_PRESSED, origin, origin,
                        ui::EventTimeForNow(), 0, 0);
  
    EXPECT_EQ("100,100", root.location().ToString());
    EXPECT_EQ("100,100", root.root_location().ToString());
  
    ui::MouseEvent translated_event(
        root, static_cast<Window*>(root_window()), w1.get(),
        ui::ET_MOUSE_ENTERED, root.flags());
    EXPECT_EQ("50,50", translated_event.location().ToString());
    EXPECT_EQ("100,100", translated_event.root_location().ToString());
  }
  
  namespace {
  
  class TestEventClient : public client::EventClient {
   public:
    static const int kNonLockWindowId = 100;
    static const int kLockWindowId = 200;
  
    explicit TestEventClient(Window* root_window)
        : root_window_(root_window),
          lock_(false) {
      client::SetEventClient(root_window_, this);
      Window* lock_window =
          test::CreateTestWindowWithBounds(root_window_->bounds(), root_window_);
      lock_window->set_id(kLockWindowId);
      Window* non_lock_window =
          test::CreateTestWindowWithBounds(root_window_->bounds(), root_window_);
      non_lock_window->set_id(kNonLockWindowId);
    }
    ~TestEventClient() override { client::SetEventClient(root_window_, NULL); }
  
    // Starts/stops locking. Locking prevents windows other than those inside
    // the lock container from receiving events, getting focus etc.
    void Lock() {
      lock_ = true;
    }
    void Unlock() {
      lock_ = false;
    }
  
    Window* GetLockWindow() {
      return const_cast<Window*>(
          static_cast<const TestEventClient*>(this)->GetLockWindow());
    }
    const Window* GetLockWindow() const {
      return root_window_->GetChildById(kLockWindowId);
    }
    Window* GetNonLockWindow() {
      return root_window_->GetChildById(kNonLockWindowId);
    }
  
   private:
    // Overridden from client::EventClient:
    bool CanProcessEventsWithinSubtree(const Window* window) const override {
      return lock_ ?
          window->Contains(GetLockWindow()) || GetLockWindow()->Contains(window) :
          true;
    }
  
    ui::EventTarget* GetToplevelEventTarget() override { return NULL; }
  
    Window* root_window_;
    bool lock_;
  
    DISALLOW_COPY_AND_ASSIGN(TestEventClient);
  };
  
  }  // namespace
  
  TEST_P(WindowEventDispatcherTest, CanProcessEventsWithinSubtree) {
    TestEventClient client(root_window());
    test::TestWindowDelegate d;
  
    ui::test::TestEventHandler nonlock_ef;
    ui::test::TestEventHandler lock_ef;
    client.GetNonLockWindow()->AddPreTargetHandler(&nonlock_ef);
    client.GetLockWindow()->AddPreTargetHandler(&lock_ef);
  
    Window* w1 = test::CreateTestWindowWithBounds(gfx::Rect(10, 10, 20, 20),
                                                  client.GetNonLockWindow());
    w1->set_id(1);
    Window* w2 = test::CreateTestWindowWithBounds(gfx::Rect(30, 30, 20, 20),
                                                  client.GetNonLockWindow());
    w2->set_id(2);
    std::unique_ptr<Window> w3(test::CreateTestWindowWithDelegate(
        &d, 3, gfx::Rect(30, 30, 20, 20), client.GetLockWindow()));
  
    w1->Focus();
    EXPECT_TRUE(IsFocusedWindow(w1));
  
    client.Lock();
  
    // Since we're locked, the attempt to focus w2 will be ignored.
    w2->Focus();
    EXPECT_TRUE(IsFocusedWindow(w1));
    EXPECT_FALSE(IsFocusedWindow(w2));
  
    {
      // Attempting to send a key event to w1 (not in the lock container) should
      // cause focus to be reset.
      ui::test::EventGenerator generator(root_window());
      generator.PressKey(ui::VKEY_SPACE, 0);
      EXPECT_EQ(NULL, client::GetFocusClient(w1)->GetFocusedWindow());
      EXPECT_FALSE(IsFocusedWindow(w1));
    }
  
    {
      // Events sent to a window not in the lock container will not be processed.
      // i.e. never sent to the non-lock container's event filter.
      ui::test::EventGenerator generator(root_window(), w1);
      generator.ClickLeftButton();
      EXPECT_EQ(0, nonlock_ef.num_mouse_events());
  
      // Events sent to a window in the lock container will be processed.
      ui::test::EventGenerator generator3(root_window(), w3.get());
      generator3.PressLeftButton();
      EXPECT_EQ(1, lock_ef.num_mouse_events());
    }
  
    // Prevent w3 from being deleted by the hierarchy since its delegate is owned
    // by this scope.
    w3->parent()->RemoveChild(w3.get());
  }
  
  TEST_P(WindowEventDispatcherTest, DontIgnoreUnknownKeys) {
    ConsumeKeyHandler handler;
    root_window()->AddPreTargetHandler(&handler);
  
    ui::KeyEvent unknown_event(ui::ET_KEY_PRESSED, ui::VKEY_UNKNOWN, ui::EF_NONE);
    DispatchEventUsingWindowDispatcher(&unknown_event);
    EXPECT_TRUE(unknown_event.handled());
    EXPECT_EQ(1, handler.num_key_events());
  
    handler.Reset();
    ui::KeyEvent known_event(ui::ET_KEY_PRESSED, ui::VKEY_A, ui::EF_NONE);
    DispatchEventUsingWindowDispatcher(&known_event);
    EXPECT_TRUE(known_event.handled());
    EXPECT_EQ(1, handler.num_key_events());
  
    handler.Reset();
    ui::KeyEvent ime_event(ui::ET_KEY_PRESSED, ui::VKEY_UNKNOWN,
                           ui::EF_IME_FABRICATED_KEY);
    DispatchEventUsingWindowDispatcher(&ime_event);
    EXPECT_TRUE(ime_event.handled());
    EXPECT_EQ(1, handler.num_key_events());
  
    handler.Reset();
    ui::KeyEvent unknown_key_with_char_event(ui::ET_KEY_PRESSED, ui::VKEY_UNKNOWN,
                                             ui::EF_NONE);
    unknown_key_with_char_event.set_character(0x00e4 /* "ä" */);
    DispatchEventUsingWindowDispatcher(&unknown_key_with_char_event);
    EXPECT_TRUE(unknown_key_with_char_event.handled());
    EXPECT_EQ(1, handler.num_key_events());
    root_window()->RemovePreTargetHandler(&handler);
  }
  
  TEST_P(WindowEventDispatcherTest, NoDelegateWindowReceivesKeyEvents) {
    std::unique_ptr<Window> w1(CreateNormalWindow(1, root_window(), NULL));
    w1->Show();
    w1->Focus();
  
    ui::test::TestEventHandler handler;
    w1->AddPreTargetHandler(&handler);
    ui::KeyEvent key_press(ui::ET_KEY_PRESSED, ui::VKEY_A, ui::EF_NONE);
    DispatchEventUsingWindowDispatcher(&key_press);
    EXPECT_TRUE(key_press.handled());
    EXPECT_EQ(1, handler.num_key_events());
  
    w1->RemovePreTargetHandler(&handler);
  }
  
  // Tests that touch-events that are beyond the bounds of the root-window do get
  // propagated to the event filters correctly with the root as the target.
  TEST_P(WindowEventDispatcherTest, TouchEventsOutsideBounds) {
    ui::test::TestEventHandler handler;
    root_window()->AddPreTargetHandler(&handler);
  
    gfx::Point position = root_window()->bounds().origin();
    position.Offset(-10, -10);
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, position, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);
    EXPECT_EQ(1, handler.num_touch_events());
  
    position = root_window()->bounds().origin();
    position.Offset(root_window()->bounds().width() + 10,
                    root_window()->bounds().height() + 10);
    ui::TouchEvent release(
        ui::ET_TOUCH_RELEASED, position, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&release);
    EXPECT_EQ(2, handler.num_touch_events());
    root_window()->RemovePreTargetHandler(&handler);
  }
  
  // Tests that scroll events are dispatched correctly.
  TEST_P(WindowEventDispatcherTest, ScrollEventDispatch) {
    base::TimeTicks now = ui::EventTimeForNow();
    ui::test::TestEventHandler handler;
    root_window()->AddPreTargetHandler(&handler);
  
    test::TestWindowDelegate delegate;
    std::unique_ptr<Window> w1(CreateNormalWindow(1, root_window(), &delegate));
    w1->SetBounds(gfx::Rect(20, 20, 40, 40));
  
    // A scroll event on the root-window itself is dispatched.
    ui::ScrollEvent scroll1(ui::ET_SCROLL,
                            gfx::Point(10, 10),
                            now,
                            0,
                            0, -10,
                            0, -10,
                            2);
    DispatchEventUsingWindowDispatcher(&scroll1);
    EXPECT_EQ(1, handler.num_scroll_events());
  
    // Scroll event on a window should be dispatched properly.
    ui::ScrollEvent scroll2(ui::ET_SCROLL,
                            gfx::Point(25, 30),
                            now,
                            0,
                            -10, 0,
                            -10, 0,
                            2);
    DispatchEventUsingWindowDispatcher(&scroll2);
    EXPECT_EQ(2, handler.num_scroll_events());
    root_window()->RemovePreTargetHandler(&handler);
  }
  
  namespace {
  
  // FilterFilter that tracks the types of events it's seen.
  class EventFilterRecorder : public ui::EventHandler {
   public:
    typedef std::vector<ui::EventType> Events;
    typedef std::vector<gfx::Point> EventLocations;
    typedef std::vector<int> EventFlags;
  
    EventFilterRecorder()
        : wait_until_event_(ui::ET_UNKNOWN),
          last_touch_may_cause_scrolling_(false) {
    }
  
    const Events& events() const { return events_; }
  
    const EventLocations& mouse_locations() const { return mouse_locations_; }
    gfx::Point mouse_location(int i) const { return mouse_locations_[i]; }
    const EventLocations& touch_locations() const { return touch_locations_; }
    const EventLocations& gesture_locations() const { return gesture_locations_; }
    const EventFlags& mouse_event_flags() const { return mouse_event_flags_; }
  
    void WaitUntilReceivedEvent(ui::EventType type) {
      wait_until_event_ = type;
      run_loop_.reset(new base::RunLoop());
      run_loop_->Run();
    }
  
    Events GetAndResetEvents() {
      Events events = events_;
      Reset();
      return events;
    }
  
    void Reset() {
      events_.clear();
      mouse_locations_.clear();
      touch_locations_.clear();
      gesture_locations_.clear();
      mouse_event_flags_.clear();
      last_touch_may_cause_scrolling_ = false;
    }
  
    // ui::EventHandler overrides:
    void OnEvent(ui::Event* event) override {
      ui::EventHandler::OnEvent(event);
      events_.push_back(event->type());
      if (wait_until_event_ == event->type() && run_loop_) {
        run_loop_->Quit();
        wait_until_event_ = ui::ET_UNKNOWN;
      }
    }
  
    void OnMouseEvent(ui::MouseEvent* event) override {
      mouse_locations_.push_back(event->location());
      mouse_event_flags_.push_back(event->flags());
    }
  
    void OnTouchEvent(ui::TouchEvent* event) override {
      touch_locations_.push_back(event->location());
      last_touch_may_cause_scrolling_ = event->may_cause_scrolling();
    }
  
    void OnGestureEvent(ui::GestureEvent* event) override {
      gesture_locations_.push_back(event->location());
    }
  
    bool HasReceivedEvent(ui::EventType type) {
      return std::find(events_.begin(), events_.end(), type) != events_.end();
    }
  
    bool LastTouchMayCauseScrolling() const {
      return last_touch_may_cause_scrolling_;
    }
  
   private:
    std::unique_ptr<base::RunLoop> run_loop_;
    ui::EventType wait_until_event_;
  
    Events events_;
    EventLocations mouse_locations_;
    EventLocations touch_locations_;
    EventLocations gesture_locations_;
    EventFlags mouse_event_flags_;
    bool last_touch_may_cause_scrolling_;
  
    DISALLOW_COPY_AND_ASSIGN(EventFilterRecorder);
  };
  
  // Converts an EventType to a string.
  std::string EventTypeToString(ui::EventType type) {
    switch (type) {
      case ui::ET_TOUCH_RELEASED:
        return "TOUCH_RELEASED";
  
      case ui::ET_TOUCH_CANCELLED:
        return "TOUCH_CANCELLED";
  
      case ui::ET_TOUCH_PRESSED:
        return "TOUCH_PRESSED";
  
      case ui::ET_TOUCH_MOVED:
        return "TOUCH_MOVED";
  
      case ui::ET_MOUSE_PRESSED:
        return "MOUSE_PRESSED";
  
      case ui::ET_MOUSE_DRAGGED:
        return "MOUSE_DRAGGED";
  
      case ui::ET_MOUSE_RELEASED:
        return "MOUSE_RELEASED";
  
      case ui::ET_MOUSE_MOVED:
        return "MOUSE_MOVED";
  
      case ui::ET_MOUSE_ENTERED:
        return "MOUSE_ENTERED";
  
      case ui::ET_MOUSE_EXITED:
        return "MOUSE_EXITED";
  
      case ui::ET_GESTURE_SCROLL_BEGIN:
        return "GESTURE_SCROLL_BEGIN";
  
      case ui::ET_GESTURE_SCROLL_END:
        return "GESTURE_SCROLL_END";
  
      case ui::ET_GESTURE_SCROLL_UPDATE:
        return "GESTURE_SCROLL_UPDATE";
  
      case ui::ET_GESTURE_PINCH_BEGIN:
        return "GESTURE_PINCH_BEGIN";
  
      case ui::ET_GESTURE_PINCH_END:
        return "GESTURE_PINCH_END";
  
      case ui::ET_GESTURE_PINCH_UPDATE:
        return "GESTURE_PINCH_UPDATE";
  
      case ui::ET_GESTURE_TAP:
        return "GESTURE_TAP";
  
      case ui::ET_GESTURE_TAP_DOWN:
        return "GESTURE_TAP_DOWN";
  
      case ui::ET_GESTURE_TAP_CANCEL:
        return "GESTURE_TAP_CANCEL";
  
      case ui::ET_GESTURE_SHOW_PRESS:
        return "GESTURE_SHOW_PRESS";
  
      case ui::ET_GESTURE_BEGIN:
        return "GESTURE_BEGIN";
  
      case ui::ET_GESTURE_END:
        return "GESTURE_END";
  
      default:
        // We should explicitly require each event type.
        NOTREACHED() << "Received unexpected event: " << type;
        break;
    }
    return "";
  }
  
  std::string EventTypesToString(const EventFilterRecorder::Events& events) {
    std::string result;
    for (size_t i = 0; i < events.size(); ++i) {
      if (i != 0)
        result += " ";
      result += EventTypeToString(events[i]);
    }
    return result;
  }
  
  }  // namespace
  
  #if defined(OS_WIN) && defined(ARCH_CPU_X86)
  #define MAYBE(x) DISABLED_##x
  #else
  #define MAYBE(x) x
  #endif
  
  // Verifies a repost mouse event targets the window with capture (if there is
  // one).
  // Flaky on 32-bit Windows bots.  http://crbug.com/388290
  TEST_P(WindowEventDispatcherTest, MAYBE(RepostTargetsCaptureWindow)) {
    // Set capture on |window| generate a mouse event (that is reposted) and not
    // over |window| and verify |window| gets it (|window| gets it because it has
    // capture).
    EXPECT_FALSE(Env::GetInstance()->IsMouseButtonDown());
    EventFilterRecorder recorder;
    std::unique_ptr<Window> window(CreateNormalWindow(1, root_window(), NULL));
    window->SetBounds(gfx::Rect(20, 20, 40, 30));
    window->AddPreTargetHandler(&recorder);
    window->SetCapture();
    const ui::MouseEvent press_event(
        ui::ET_MOUSE_PRESSED, gfx::Point(), gfx::Point(), ui::EventTimeForNow(),
        ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON);
    host()->dispatcher()->RepostEvent(&press_event);
    RunAllPendingInMessageLoop();  // Necessitated by RepostEvent().
    // Mouse moves/enters may be generated. We only care about a pressed.
    EXPECT_TRUE(EventTypesToString(recorder.events()).find("MOUSE_PRESSED") !=
                std::string::npos) << EventTypesToString(recorder.events());
  }
  
  TEST_P(WindowEventDispatcherTest, MouseMovesHeld) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));
  
    ui::MouseEvent mouse_move_event(ui::ET_MOUSE_MOVED, gfx::Point(0, 0),
                                    gfx::Point(0, 0), ui::EventTimeForNow(), 0,
                                    0);
    DispatchEventUsingWindowDispatcher(&mouse_move_event);
    // Discard MOUSE_ENTER.
    recorder.Reset();
  
    host()->dispatcher()->HoldPointerMoves();
  
    // Check that we don't immediately dispatch the MOUSE_DRAGGED event.
    ui::MouseEvent mouse_dragged_event(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0),
                                       gfx::Point(0, 0), ui::EventTimeForNow(), 0,
                                       0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    EXPECT_TRUE(recorder.events().empty());
  
    // Check that we do dispatch the held MOUSE_DRAGGED event before another type
    // of event.
    ui::MouseEvent mouse_pressed_event(ui::ET_MOUSE_PRESSED, gfx::Point(0, 0),
                                       gfx::Point(0, 0), ui::EventTimeForNow(), 0,
                                       0);
    DispatchEventUsingWindowDispatcher(&mouse_pressed_event);
    EXPECT_EQ("MOUSE_DRAGGED MOUSE_PRESSED",
              EventTypesToString(recorder.events()));
    recorder.Reset();
  
    // Check that we coalesce held MOUSE_DRAGGED events. Note that here (and
    // elsewhere in this test) we re-define each event prior to dispatch so that
    // it has the correct state (phase, handled, target, etc.).
    mouse_dragged_event =
        ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
                       ui::EventTimeForNow(), 0, 0);
    ui::MouseEvent mouse_dragged_event2(ui::ET_MOUSE_DRAGGED, gfx::Point(10, 10),
                                        gfx::Point(10, 10), ui::EventTimeForNow(),
                                        0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event2);
    EXPECT_TRUE(recorder.events().empty());
    mouse_pressed_event =
        ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(0, 0), gfx::Point(0, 0),
                       ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_pressed_event);
    EXPECT_EQ("MOUSE_DRAGGED MOUSE_PRESSED",
              EventTypesToString(recorder.events()));
    recorder.Reset();
  
    // Check that on ReleasePointerMoves, held events are not dispatched
    // immediately, but posted instead.
    mouse_dragged_event =
        ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
                       ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    host()->dispatcher()->ReleasePointerMoves();
    EXPECT_TRUE(recorder.events().empty());
    RunAllPendingInMessageLoop();
    EXPECT_EQ("MOUSE_DRAGGED", EventTypesToString(recorder.events()));
    recorder.Reset();
  
    // However if another message comes in before the dispatch of the posted
    // event, check that the posted event is dispatched before this new event.
    host()->dispatcher()->HoldPointerMoves();
    mouse_dragged_event =
        ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
                       ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    host()->dispatcher()->ReleasePointerMoves();
    mouse_pressed_event =
        ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(0, 0), gfx::Point(0, 0),
                       ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_pressed_event);
    EXPECT_EQ("MOUSE_DRAGGED MOUSE_PRESSED",
              EventTypesToString(recorder.events()));
    recorder.Reset();
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
  
    // Check that if the other message is another MOUSE_DRAGGED, we still coalesce
    // them.
    host()->dispatcher()->HoldPointerMoves();
    mouse_dragged_event =
        ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
                       ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    host()->dispatcher()->ReleasePointerMoves();
    mouse_dragged_event2 =
        ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(10, 10),
                       gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event2);
    EXPECT_EQ("MOUSE_DRAGGED", EventTypesToString(recorder.events()));
    recorder.Reset();
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
  
    // Check that synthetic mouse move event has a right location when issued
    // while holding pointer moves.
    mouse_dragged_event =
        ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
                       ui::EventTimeForNow(), 0, 0);
    mouse_dragged_event2 =
        ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(10, 10),
                       gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    ui::MouseEvent mouse_dragged_event3(ui::ET_MOUSE_DRAGGED, gfx::Point(28, 28),
                                        gfx::Point(28, 28), ui::EventTimeForNow(),
                                        0, 0);
    host()->dispatcher()->HoldPointerMoves();
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event2);
    window->SetBounds(gfx::Rect(15, 15, 80, 80));
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event3);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
    host()->dispatcher()->ReleasePointerMoves();
    RunAllPendingInMessageLoop();
    EXPECT_EQ("MOUSE_MOVED", EventTypesToString(recorder.events()));
    EXPECT_EQ(gfx::Point(13, 13), recorder.mouse_location(0));
    recorder.Reset();
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  TEST_P(WindowEventDispatcherTest, TouchMovesHeld) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));
  
    // Starting the touch and throwing out the first few events, since the system
    // is going to generate synthetic mouse events that are not relevant to the
    // test.
    ui::TouchEvent touch_pressed_event(
        ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&touch_pressed_event);
    recorder.WaitUntilReceivedEvent(ui::ET_GESTURE_SHOW_PRESS);
    recorder.Reset();
  
    host()->dispatcher()->HoldPointerMoves();
  
    // Check that we don't immediately dispatch the TOUCH_MOVED event.
    ui::TouchEvent touch_moved_event(
        ui::ET_TOUCH_MOVED, gfx::Point(10, 10), 0, ui::EventTimeForNow());
    ui::TouchEvent touch_moved_event2(
        ui::ET_TOUCH_MOVED, gfx::Point(11, 10), 0, ui::EventTimeForNow());
    ui::TouchEvent touch_moved_event3(
        ui::ET_TOUCH_MOVED, gfx::Point(12, 10), 0, ui::EventTimeForNow());
  
    DispatchEventUsingWindowDispatcher(&touch_moved_event);
    EXPECT_TRUE(recorder.events().empty());
  
    // Check that on ReleasePointerMoves, held events are not dispatched
    // immediately, but posted instead.
    DispatchEventUsingWindowDispatcher(&touch_moved_event2);
    host()->dispatcher()->ReleasePointerMoves();
    EXPECT_TRUE(recorder.events().empty());
  
    RunAllPendingInMessageLoop();
    EXPECT_EQ("TOUCH_MOVED", EventTypesToString(recorder.events()));
    recorder.Reset();
  
    // If another touch event occurs then the held touch should be dispatched
    // immediately before it.
    ui::TouchEvent touch_released_event(
        ui::ET_TOUCH_RELEASED, gfx::Point(10, 10), 0, ui::EventTimeForNow());
    recorder.Reset();
    host()->dispatcher()->HoldPointerMoves();
    DispatchEventUsingWindowDispatcher(&touch_moved_event3);
    DispatchEventUsingWindowDispatcher(&touch_released_event);
    EXPECT_EQ("TOUCH_MOVED TOUCH_RELEASED GESTURE_TAP GESTURE_END",
              EventTypesToString(recorder.events()));
    recorder.Reset();
    host()->dispatcher()->ReleasePointerMoves();
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // Tests that mouse move event has a right location
  // when there isn't the target window
  TEST_P(WindowEventDispatcherTest, MouseEventWithoutTargetWindow) {
    EventFilterRecorder recorder_first;
    EventFilterRecorder recorder_second;
  
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window_first(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(20, 10, 10, 20), root_window()));
    window_first->Show();
    window_first->AddPreTargetHandler(&recorder_first);
  
    std::unique_ptr<aura::Window> window_second(CreateTestWindowWithDelegate(
        &delegate, 2, gfx::Rect(20, 30, 10, 20), root_window()));
    window_second->Show();
    window_second->AddPreTargetHandler(&recorder_second);
  
    const gfx::Point event_location(22, 33);
    ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, event_location, event_location,
                         ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse);
  
    EXPECT_TRUE(recorder_first.events().empty());
    EXPECT_EQ("MOUSE_ENTERED MOUSE_MOVED",
              EventTypesToString(recorder_second.events()));
    ASSERT_EQ(2u, recorder_second.mouse_locations().size());
    EXPECT_EQ(gfx::Point(2, 3).ToString(),
              recorder_second.mouse_locations()[0].ToString());
  }
  
  // Tests that a mouse exit is dispatched to the last mouse location when
  // the window is hiddden.
  TEST_P(WindowEventDispatcherTest, DispatchMouseExitWhenHidingWindow) {
    EventFilterRecorder recorder;
  
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(10, 10, 50, 50), root_window()));
    window->Show();
    window->AddPreTargetHandler(&recorder);
  
    // Dispatch a mouse move event into the window.
    const gfx::Point event_location(22, 33);
    ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, event_location, event_location,
                         ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();
  
    // Hide the window and verify a mouse exit event's location.
    window->Hide();
    EXPECT_FALSE(recorder.events().empty());
    EXPECT_EQ("MOUSE_EXITED", EventTypesToString(recorder.events()));
    ASSERT_EQ(1u, recorder.mouse_locations().size());
    EXPECT_EQ(gfx::Point(12, 23).ToString(),
              recorder.mouse_locations()[0].ToString());
  }
  
  // Verifies that a direct call to ProcessedTouchEvent() does not cause a crash.
  TEST_P(WindowEventDispatcherTest, CallToProcessedTouchEvent) {
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));
  
    host()->dispatcher()->ProcessedTouchEvent(0, window.get(), ui::ER_UNHANDLED);
  }
  
  // This event handler requests the dispatcher to start holding pointer-move
  // events when it receives the first scroll-update gesture.
  class HoldPointerOnScrollHandler : public ui::test::TestEventHandler {
   public:
    HoldPointerOnScrollHandler(WindowEventDispatcher* dispatcher,
                               EventFilterRecorder* filter)
        : dispatcher_(dispatcher),
          filter_(filter),
          holding_moves_(false) {}
    ~HoldPointerOnScrollHandler() override {}
  
   private:
    // ui::test::TestEventHandler:
    void OnGestureEvent(ui::GestureEvent* gesture) override {
      if (!holding_moves_ && gesture->type() == ui::ET_GESTURE_SCROLL_UPDATE) {
        holding_moves_ = true;
        dispatcher_->HoldPointerMoves();
        filter_->Reset();
      } else if (gesture->type() == ui::ET_GESTURE_SCROLL_END) {
        dispatcher_->ReleasePointerMoves();
        holding_moves_ = false;
      }
    }
  
    WindowEventDispatcher* dispatcher_;
    EventFilterRecorder* filter_;
    bool holding_moves_;
  
    DISALLOW_COPY_AND_ASSIGN(HoldPointerOnScrollHandler);
  };
  
  // Tests that touch-move events don't contribute to an in-progress scroll
  // gesture if touch-move events are being held by the dispatcher.
  TEST_P(WindowEventDispatcherTest, TouchMovesHeldOnScroll) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
    test::TestWindowDelegate delegate;
    HoldPointerOnScrollHandler handler(host()->dispatcher(), &recorder);
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));
    window->AddPreTargetHandler(&handler);
  
    ui::test::EventGenerator generator(root_window());
    generator.GestureScrollSequence(
        gfx::Point(60, 60), gfx::Point(10, 60),
        base::TimeDelta::FromMilliseconds(100), 25);
  
    // |handler| will have reset |filter| and started holding the touch-move
    // events when scrolling started. At the end of the scroll (i.e. upon
    // touch-release), the held touch-move event will have been dispatched first,
    // along with the subsequent events (i.e. touch-release, scroll-end, and
    // gesture-end).
    const EventFilterRecorder::Events& events = recorder.events();
    EXPECT_EQ(
        "TOUCH_MOVED GESTURE_SCROLL_UPDATE TOUCH_RELEASED "
        "GESTURE_SCROLL_END GESTURE_END",
        EventTypesToString(events));
    ASSERT_EQ(2u, recorder.touch_locations().size());
    EXPECT_EQ(gfx::Point(-40, 10).ToString(),
              recorder.touch_locations()[0].ToString());
    EXPECT_EQ(gfx::Point(-40, 10).ToString(),
              recorder.touch_locations()[1].ToString());
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // Tests that a 'held' touch-event does contribute to gesture event when it is
  // dispatched.
  TEST_P(WindowEventDispatcherTest, HeldTouchMoveContributesToGesture) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    const gfx::Point location(20, 20);
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, location, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_PRESSED));
    recorder.Reset();
  
    host()->dispatcher()->HoldPointerMoves();
  
    ui::TouchEvent move(ui::ET_TOUCH_MOVED,
                        location + gfx::Vector2d(100, 100),
                        0,
                        ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move);
    EXPECT_FALSE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    EXPECT_FALSE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_BEGIN));
    recorder.Reset();
  
    host()->dispatcher()->ReleasePointerMoves();
    EXPECT_FALSE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_BEGIN));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_UPDATE));
  
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // Tests that synthetic mouse events are ignored when mouse
  // events are disabled.
  TEST_P(WindowEventDispatcherTest, DispatchSyntheticMouseEvents) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(5, 5, 100, 100), root_window()));
    window->Show();
    window->SetCapture();
  
    test::TestCursorClient cursor_client(root_window());
  
    // Dispatch a non-synthetic mouse event when mouse events are enabled.
    ui::MouseEvent mouse1(ui::ET_MOUSE_MOVED, gfx::Point(10, 10),
                          gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse1);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();
  
    // Dispatch a synthetic mouse event when mouse events are enabled.
    ui::MouseEvent mouse2(ui::ET_MOUSE_MOVED, gfx::Point(10, 10),
                          gfx::Point(10, 10), ui::EventTimeForNow(),
                          ui::EF_IS_SYNTHESIZED, 0);
    DispatchEventUsingWindowDispatcher(&mouse2);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();
  
    // Dispatch a synthetic mouse event when mouse events are disabled.
    cursor_client.DisableMouseEvents();
    DispatchEventUsingWindowDispatcher(&mouse2);
    EXPECT_TRUE(recorder.events().empty());
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // Tests that a mouse-move event is not synthesized when a mouse-button is down.
  TEST_P(WindowEventDispatcherTest, DoNotSynthesizeWhileButtonDown) {
    EventFilterRecorder recorder;
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(5, 5, 100, 100), root_window()));
    window->Show();
  
    window->AddPreTargetHandler(&recorder);
    // Dispatch a non-synthetic mouse event when mouse events are enabled.
    ui::MouseEvent mouse1(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
                          gfx::Point(10, 10), ui::EventTimeForNow(),
                          ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON);
    DispatchEventUsingWindowDispatcher(&mouse1);
    ASSERT_EQ(1u, recorder.events().size());
    EXPECT_EQ(ui::ET_MOUSE_PRESSED, recorder.events()[0]);
    window->RemovePreTargetHandler(&recorder);
    recorder.Reset();
  
    // Move |window| away from underneath the cursor.
    root_window()->AddPreTargetHandler(&recorder);
    window->SetBounds(gfx::Rect(30, 30, 100, 100));
    EXPECT_TRUE(recorder.events().empty());
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  #if defined(OS_WIN) && defined(ARCH_CPU_X86)
  #define MAYBE(x) DISABLED_##x
  #else
  #define MAYBE(x) x
  #endif
  
  // Tests synthetic mouse events generated when window bounds changes such that
  // the cursor previously outside the window becomes inside, or vice versa.
  // Do not synthesize events if the window ignores events or is invisible.
  // Flaky on 32-bit Windows bots.  http://crbug.com/388272
  TEST_P(WindowEventDispatcherTest,
         MAYBE(SynthesizeMouseEventsOnWindowBoundsChanged)) {
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(5, 5, 100, 100), root_window()));
    window->Show();
    window->SetCapture();
  
    EventFilterRecorder recorder;
    window->AddPreTargetHandler(&recorder);
  
    // Dispatch a non-synthetic mouse event to place cursor inside window bounds.
    ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, gfx::Point(10, 10),
                         gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();
  
    // Update the window bounds so that cursor is now outside the window.
    // This should trigger a synthetic MOVED event.
    gfx::Rect bounds1(20, 20, 100, 100);
    window->SetBounds(bounds1);
    RunAllPendingInMessageLoop();
    ASSERT_FALSE(recorder.events().empty());
    ASSERT_FALSE(recorder.mouse_event_flags().empty());
    EXPECT_EQ(ui::ET_MOUSE_MOVED, recorder.events().back());
    EXPECT_EQ(ui::EF_IS_SYNTHESIZED, recorder.mouse_event_flags().back());
    recorder.Reset();
  
    // Set window to ignore events.
    window->set_ignore_events(true);
  
    // Update the window bounds so that cursor is back inside the window.
    // This should not trigger a synthetic event.
    gfx::Rect bounds2(5, 5, 100, 100);
    window->SetBounds(bounds2);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
    recorder.Reset();
  
    // Set window to accept events but invisible.
    window->set_ignore_events(false);
    window->Hide();
    recorder.Reset();
  
    // Update the window bounds so that cursor is outside the window.
    // This should not trigger a synthetic event.
    window->SetBounds(bounds1);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
  }
  
  // Tests that a mouse exit is dispatched to the last known cursor location
  // when the cursor becomes invisible.
  TEST_P(WindowEventDispatcherTest, DispatchMouseExitWhenCursorHidden) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    test::TestWindowDelegate delegate;
    gfx::Point window_origin(7, 18);
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(window_origin, gfx::Size(100, 100)),
        root_window()));
    window->Show();
  
    // Dispatch a mouse move event into the window.
    gfx::Point mouse_location(gfx::Point(15, 25));
    ui::MouseEvent mouse1(ui::ET_MOUSE_MOVED, mouse_location, mouse_location,
                          ui::EventTimeForNow(), 0, 0);
    EXPECT_TRUE(recorder.events().empty());
    DispatchEventUsingWindowDispatcher(&mouse1);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();
  
    // Hide the cursor and verify a mouse exit was dispatched.
    host()->OnCursorVisibilityChanged(false);
    EXPECT_FALSE(recorder.events().empty());
    EXPECT_EQ("MOUSE_EXITED", EventTypesToString(recorder.events()));
  
    // Verify the mouse exit was dispatched at the correct location
    // (in the correct coordinate space).
    int translated_x = mouse_location.x() - window_origin.x();
    int translated_y = mouse_location.y() - window_origin.y();
    gfx::Point translated_point(translated_x, translated_y);
    EXPECT_EQ(recorder.mouse_location(0).ToString(), translated_point.ToString());
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // Tests that a synthetic mouse exit is dispatched to the last known cursor
  // location after mouse events are disabled on the cursor client.
  TEST_P(WindowEventDispatcherTest,
         DispatchSyntheticMouseExitAfterMouseEventsDisabled) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    test::TestWindowDelegate delegate;
    gfx::Point window_origin(7, 18);
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(window_origin, gfx::Size(100, 100)),
        root_window()));
    window->Show();
  
    // Dispatch a mouse move event into the window.
    gfx::Point mouse_location(gfx::Point(15, 25));
    ui::MouseEvent mouse1(ui::ET_MOUSE_MOVED, mouse_location, mouse_location,
                          ui::EventTimeForNow(), 0, 0);
    EXPECT_TRUE(recorder.events().empty());
    DispatchEventUsingWindowDispatcher(&mouse1);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();
  
    test::TestCursorClient cursor_client(root_window());
    cursor_client.DisableMouseEvents();
  
    gfx::Point mouse_exit_location(gfx::Point(150, 150));
    ui::MouseEvent mouse2(ui::ET_MOUSE_EXITED, gfx::Point(150, 150),
                          gfx::Point(150, 150), ui::EventTimeForNow(),
                          ui::EF_IS_SYNTHESIZED, 0);
    DispatchEventUsingWindowDispatcher(&mouse2);
  
    EXPECT_FALSE(recorder.events().empty());
    // We get the mouse exited event twice in our filter. Once during the
    // predispatch phase and during the actual dispatch.
    EXPECT_EQ("MOUSE_EXITED MOUSE_EXITED", EventTypesToString(recorder.events()));
  
    // Verify the mouse exit was dispatched at the correct location
    // (in the correct coordinate space).
    int translated_x = mouse_exit_location.x() - window_origin.x();
    int translated_y = mouse_exit_location.y() - window_origin.y();
    gfx::Point translated_point(translated_x, translated_y);
    EXPECT_EQ(recorder.mouse_location(0).ToString(), translated_point.ToString());
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  class DeletingEventFilter : public ui::EventHandler {
   public:
    DeletingEventFilter()
        : delete_during_pre_handle_(false) {}
    ~DeletingEventFilter() override {}
  
    void Reset(bool delete_during_pre_handle) {
      delete_during_pre_handle_ = delete_during_pre_handle;
    }
  
   private:
    // Overridden from ui::EventHandler:
    void OnKeyEvent(ui::KeyEvent* event) override {
      if (delete_during_pre_handle_)
        delete event->target();
    }
  
    void OnMouseEvent(ui::MouseEvent* event) override {
      if (delete_during_pre_handle_)
        delete event->target();
    }
  
    bool delete_during_pre_handle_;
  
    DISALLOW_COPY_AND_ASSIGN(DeletingEventFilter);
  };
  
  class DeletingWindowDelegate : public test::TestWindowDelegate {
   public:
    DeletingWindowDelegate()
        : window_(NULL),
          delete_during_handle_(false),
          got_event_(false) {}
    ~DeletingWindowDelegate() override {}
  
    void Reset(Window* window, bool delete_during_handle) {
      window_ = window;
      delete_during_handle_ = delete_during_handle;
      got_event_ = false;
    }
    bool got_event() const { return got_event_; }
  
   private:
    // Overridden from WindowDelegate:
    void OnKeyEvent(ui::KeyEvent* event) override {
      if (delete_during_handle_)
        delete window_;
      got_event_ = true;
    }
  
    void OnMouseEvent(ui::MouseEvent* event) override {
      if (delete_during_handle_)
        delete window_;
      got_event_ = true;
    }
  
    Window* window_;
    bool delete_during_handle_;
    bool got_event_;
  
    DISALLOW_COPY_AND_ASSIGN(DeletingWindowDelegate);
  };
  
  TEST_P(WindowEventDispatcherTest, DeleteWindowDuringDispatch) {
    // Verifies that we can delete a window during each phase of event handling.
    // Deleting the window should not cause a crash, only prevent further
    // processing from occurring.
    std::unique_ptr<Window> w1(CreateNormalWindow(1, root_window(), NULL));
    DeletingWindowDelegate d11;
    Window* w11 = CreateNormalWindow(11, w1.get(), &d11);
    WindowTracker tracker;
    DeletingEventFilter w1_filter;
    w1->AddPreTargetHandler(&w1_filter);
    client::GetFocusClient(w1.get())->FocusWindow(w11);
  
    ui::test::EventGenerator generator(root_window(), w11);
  
    // First up, no one deletes anything.
    tracker.Add(w11);
    d11.Reset(w11, false);
  
    generator.PressLeftButton();
    EXPECT_TRUE(tracker.Contains(w11));
    EXPECT_TRUE(d11.got_event());
    generator.ReleaseLeftButton();
  
    // Delegate deletes w11. This will prevent the post-handle step from applying.
    w1_filter.Reset(false);
    d11.Reset(w11, true);
    generator.PressKey(ui::VKEY_A, 0);
    EXPECT_FALSE(tracker.Contains(w11));
    EXPECT_TRUE(d11.got_event());
  
    // Pre-handle step deletes w11. This will prevent the delegate and the post-
    // handle steps from applying.
    w11 = CreateNormalWindow(11, w1.get(), &d11);
    w1_filter.Reset(true);
    d11.Reset(w11, false);
    generator.PressLeftButton();
    EXPECT_FALSE(tracker.Contains(w11));
    EXPECT_FALSE(d11.got_event());
  }
  
  namespace {
  
  // A window delegate that detaches the parent of the target's parent window when
  // it receives a tap event.
  class DetachesParentOnTapDelegate : public test::TestWindowDelegate {
   public:
    DetachesParentOnTapDelegate() {}
    ~DetachesParentOnTapDelegate() override {}
  
   private:
    void OnGestureEvent(ui::GestureEvent* event) override {
      if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
        event->SetHandled();
        return;
      }
  
      if (event->type() == ui::ET_GESTURE_TAP) {
        Window* parent = static_cast<Window*>(event->target())->parent();
        parent->parent()->RemoveChild(parent);
        event->SetHandled();
      }
    }
  
    DISALLOW_COPY_AND_ASSIGN(DetachesParentOnTapDelegate);
  };
  
  }  // namespace
  
  // Tests that the gesture recognizer is reset for all child windows when a
  // window hides. No expectations, just checks that the test does not crash.
  TEST_P(WindowEventDispatcherTest,
         GestureRecognizerResetsTargetWhenParentHides) {
    std::unique_ptr<Window> w1(CreateNormalWindow(1, root_window(), NULL));
    DetachesParentOnTapDelegate delegate;
    std::unique_ptr<Window> parent(CreateNormalWindow(22, w1.get(), NULL));
    Window* child = CreateNormalWindow(11, parent.get(), &delegate);
    ui::test::EventGenerator generator(root_window(), child);
    generator.GestureTapAt(gfx::Point(40, 40));
  }
  
  namespace {
  
  // A window delegate that processes nested gestures on tap.
  class NestedGestureDelegate : public test::TestWindowDelegate {
   public:
    NestedGestureDelegate(ui::test::EventGenerator* generator,
                          const gfx::Point tap_location)
        : generator_(generator),
          tap_location_(tap_location),
          gesture_end_count_(0) {}
    ~NestedGestureDelegate() override {}
  
    int gesture_end_count() const { return gesture_end_count_; }
  
   private:
    void OnGestureEvent(ui::GestureEvent* event) override {
      switch (event->type()) {
        case ui::ET_GESTURE_TAP_DOWN:
          event->SetHandled();
          break;
        case ui::ET_GESTURE_TAP:
          if (generator_)
            generator_->GestureTapAt(tap_location_);
          event->SetHandled();
          break;
        case ui::ET_GESTURE_END:
          ++gesture_end_count_;
          break;
        default:
          break;
      }
    }
  
    ui::test::EventGenerator* generator_;
    const gfx::Point tap_location_;
    int gesture_end_count_;
    DISALLOW_COPY_AND_ASSIGN(NestedGestureDelegate);
  };
  
  }  // namespace
  
  // Tests that gesture end is delivered after nested gesture processing.
  TEST_P(WindowEventDispatcherTest, GestureEndDeliveredAfterNestedGestures) {
    NestedGestureDelegate d1(NULL, gfx::Point());
    std::unique_ptr<Window> w1(CreateNormalWindow(1, root_window(), &d1));
    w1->SetBounds(gfx::Rect(0, 0, 100, 100));
  
    ui::test::EventGenerator nested_generator(root_window(), w1.get());
    NestedGestureDelegate d2(&nested_generator, w1->bounds().CenterPoint());
    std::unique_ptr<Window> w2(CreateNormalWindow(1, root_window(), &d2));
    w2->SetBounds(gfx::Rect(100, 0, 100, 100));
  
    // Tap on w2 which triggers nested gestures for w1.
    ui::test::EventGenerator generator(root_window(), w2.get());
    generator.GestureTapAt(w2->bounds().CenterPoint());
  
    // Both windows should get their gesture end events.
    EXPECT_EQ(1, d1.gesture_end_count());
    EXPECT_EQ(1, d2.gesture_end_count());
  }
  
  // Tests whether we can repost the Tap down gesture event.
  TEST_P(WindowEventDispatcherTest, RepostTapdownGestureTest) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));
  
    ui::GestureEventDetails details(ui::ET_GESTURE_TAP_DOWN);
    gfx::Point point(10, 10);
    ui::GestureEvent event(point.x(),
                           point.y(),
                           0,
                           ui::EventTimeForNow(),
                           details);
    host()->dispatcher()->RepostEvent(&event);
    RunAllPendingInMessageLoop();
    // TODO(rbyers): Currently disabled - crbug.com/170987
    EXPECT_FALSE(EventTypesToString(recorder.events()).find("GESTURE_TAP_DOWN") !=
                std::string::npos);
    recorder.Reset();
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // This class inherits from the EventFilterRecorder class which provides a
  // facility to record events. This class additionally provides a facility to
  // repost the ET_GESTURE_TAP_DOWN gesture to the target window and records
  // events after that.
  class RepostGestureEventRecorder : public EventFilterRecorder {
   public:
    RepostGestureEventRecorder(aura::Window* repost_source,
                               aura::Window* repost_target)
        : repost_source_(repost_source),
          repost_target_(repost_target),
          reposted_(false),
          done_cleanup_(false) {}
  
    ~RepostGestureEventRecorder() override {}
  
    void OnTouchEvent(ui::TouchEvent* event) override {
      if (reposted_ && event->type() == ui::ET_TOUCH_PRESSED) {
        done_cleanup_ = true;
        Reset();
      }
      EventFilterRecorder::OnTouchEvent(event);
    }
  
    void OnGestureEvent(ui::GestureEvent* event) override {
      EXPECT_EQ(done_cleanup_ ? repost_target_ : repost_source_, event->target());
      if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
        if (!reposted_) {
          EXPECT_NE(repost_target_, event->target());
          reposted_ = true;
          repost_target_->GetHost()->dispatcher()->RepostEvent(event);
          // Ensure that the reposted gesture event above goes to the
          // repost_target_;
          repost_source_->GetRootWindow()->RemoveChild(repost_source_);
          return;
        }
      }
      EventFilterRecorder::OnGestureEvent(event);
    }
  
    // Ignore mouse events as they don't fire at all times. This causes
    // the GestureRepostEventOrder test to fail randomly.
    void OnMouseEvent(ui::MouseEvent* event) override {}
  
   private:
    aura::Window* repost_source_;
    aura::Window* repost_target_;
    // set to true if we reposted the ET_GESTURE_TAP_DOWN event.
    bool reposted_;
    // set true if we're done cleaning up after hiding repost_source_;
    bool done_cleanup_;
    DISALLOW_COPY_AND_ASSIGN(RepostGestureEventRecorder);
  };
  
  // Tests whether events which are generated after the reposted gesture event
  // are received after that. In this case the scroll sequence events should
  // be received after the reposted gesture event.
  TEST_P(WindowEventDispatcherTest, GestureRepostEventOrder) {
    // Expected events at the end for the repost_target window defined below.
    const char kExpectedTargetEvents[] =
      // TODO)(rbyers): Gesture event reposting is disabled - crbug.com/279039.
      // "GESTURE_BEGIN GESTURE_TAP_DOWN "
      "TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN TOUCH_MOVED "
      "GESTURE_TAP_CANCEL GESTURE_SCROLL_BEGIN GESTURE_SCROLL_UPDATE TOUCH_MOVED "
      "GESTURE_SCROLL_UPDATE TOUCH_MOVED GESTURE_SCROLL_UPDATE TOUCH_RELEASED "
      "GESTURE_SCROLL_END GESTURE_END";
    // We create two windows.
    // The first window (repost_source) is the one to which the initial tap
    // gesture is sent. It reposts this event to the second window
    // (repost_target).
    // We then generate the scroll sequence for repost_target and look for two
    // ET_GESTURE_TAP_DOWN events in the event list at the end.
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> repost_target(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));
  
    std::unique_ptr<aura::Window> repost_source(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 50, 50), root_window()));
  
    RepostGestureEventRecorder repost_event_recorder(repost_source.get(),
                                                     repost_target.get());
    root_window()->AddPreTargetHandler(&repost_event_recorder);
  
    // Generate a tap down gesture for the repost_source. This will be reposted
    // to repost_target.
    ui::test::EventGenerator repost_generator(root_window(), repost_source.get());
    repost_generator.GestureTapAt(gfx::Point(40, 40));
    RunAllPendingInMessageLoop();
  
    ui::test::EventGenerator scroll_generator(root_window(), repost_target.get());
    scroll_generator.GestureScrollSequence(
        gfx::Point(80, 80),
        gfx::Point(100, 100),
        base::TimeDelta::FromMilliseconds(100),
        3);
    RunAllPendingInMessageLoop();
  
    int tap_down_count = 0;
    for (size_t i = 0; i < repost_event_recorder.events().size(); ++i) {
      if (repost_event_recorder.events()[i] == ui::ET_GESTURE_TAP_DOWN)
        ++tap_down_count;
    }
  
    // We expect two tap down events. One from the repost and the other one from
    // the scroll sequence posted above.
    // TODO(rbyers): Currently disabled - crbug.com/170987
    EXPECT_EQ(1, tap_down_count);
  
    EXPECT_EQ(kExpectedTargetEvents,
              EventTypesToString(repost_event_recorder.events()));
    root_window()->RemovePreTargetHandler(&repost_event_recorder);
  }
  
  // An event filter that deletes the specified object when sees a mouse-exited
  // event.
  template <class T>
  class OnMouseExitDeletingEventFilter : public EventFilterRecorder {
   public:
    explicit OnMouseExitDeletingEventFilter(T* object_to_delete)
        : object_to_delete_(object_to_delete) {}
    OnMouseExitDeletingEventFilter() : object_to_delete_(nullptr) {}
    ~OnMouseExitDeletingEventFilter() override {}
  
    void set_object_to_delete(T* object_to_delete) {
      object_to_delete_ = object_to_delete;
    }
  
   private:
    // Overridden from ui::EventFilterRecorder.
    void OnMouseEvent(ui::MouseEvent* event) override {
      EventFilterRecorder::OnMouseEvent(event);
      if (object_to_delete_ && event->type() == ui::ET_MOUSE_EXITED) {
        delete object_to_delete_;
        object_to_delete_ = nullptr;
      }
    }
  
    T* object_to_delete_;
  
    DISALLOW_COPY_AND_ASSIGN(OnMouseExitDeletingEventFilter);
  };
  
  // Tests that RootWindow drops mouse-moved event that is supposed to be sent to
  // a child, but the child is destroyed because of the synthesized mouse-exit
  // event generated on the previous mouse_moved_handler_.
  TEST_P(WindowEventDispatcherTest, DeleteWindowDuringMouseMovedDispatch) {
    // Create window 1 and set its event filter. Window 1 will take ownership of
    // the event filter.
    std::unique_ptr<Window> w1(CreateNormalWindow(1, root_window(), NULL));
    OnMouseExitDeletingEventFilter<Window> w1_filter;
    w1->AddPreTargetHandler(&w1_filter);
    w1->SetBounds(gfx::Rect(20, 20, 60, 60));
    EXPECT_EQ(NULL, host()->dispatcher()->mouse_moved_handler());
  
    ui::test::EventGenerator generator(root_window(), w1.get());
  
    // Move mouse over window 1 to set it as the |mouse_moved_handler_| for the
    // root window.
    generator.MoveMouseTo(51, 51);
    EXPECT_EQ(w1.get(), host()->dispatcher()->mouse_moved_handler());
  
    // Create window 2 under the mouse cursor and stack it above window 1.
    Window* w2 = CreateNormalWindow(2, root_window(), NULL);
    w2->SetBounds(gfx::Rect(30, 30, 40, 40));
    root_window()->StackChildAbove(w2, w1.get());
  
    // Set window 2 as the window that is to be deleted when a mouse-exited event
    // happens on window 1.
    w1_filter.set_object_to_delete(w2);
  
    // Move mouse over window 2. This should generate a mouse-exited event for
    // window 1 resulting in deletion of window 2. The original mouse-moved event
    // that was targeted to window 2 should be dropped since window 2 is
    // destroyed. This test passes if no crash happens.
    generator.MoveMouseTo(52, 52);
    EXPECT_EQ(NULL, host()->dispatcher()->mouse_moved_handler());
  
    // Check events received by window 1.
    EXPECT_EQ("MOUSE_ENTERED MOUSE_MOVED MOUSE_EXITED",
              EventTypesToString(w1_filter.events()));
  }
  
  // Tests the case where the event dispatcher is deleted during the pre-dispatch
  // phase of dispatching and event.
  TEST_P(WindowEventDispatcherTest, DeleteDispatcherDuringPreDispatch) {
    // Create a host for the window hierarchy. This host will be destroyed later
    // on.
    WindowTreeHost* host = WindowTreeHost::Create(gfx::Rect(0, 0, 100, 100));
    host->InitHost();
  
    // Create two windows.
    Window* w1 = CreateNormalWindow(1, host->window(), nullptr);
    w1->SetBounds(gfx::Rect(20, 20, 60, 60));
    Window* w2 = CreateNormalWindow(2, host->window(), nullptr);
    w2->SetBounds(gfx::Rect(80, 20, 120, 60));
    EXPECT_EQ(nullptr, host->dispatcher()->mouse_moved_handler());
  
    ui::test::EventGenerator generator(host->window(), w1);
  
    // Move mouse over window 1 to set it as the |mouse_moved_handler_| for the
    // root window.
    generator.MoveMouseTo(40, 40);
    EXPECT_EQ(w1, host->dispatcher()->mouse_moved_handler());
  
    // Set appropriate event filters for the two windows with the window tree host
    // as the object that is to be deleted when a mouse-exited event happens on
    // window 1. The windows will take ownership of the event filters.
    OnMouseExitDeletingEventFilter<WindowTreeHost> w1_filter(host);
    w1->AddPreTargetHandler(&w1_filter);
    EventFilterRecorder w2_filter;
    w2->AddPreTargetHandler(&w2_filter);
  
    // Move mouse over window 2. This should generate a mouse-exited event for
    // window 1 resulting in deletion of window tree host and its event
    // dispatcher. The event dispatching should abort since the dispatcher is
    // destroyed. This test passes if no crash happens.
    // Here we can't use EventGenerator since it expects that the dispatcher is
    // not destroyed at the end of the dispatch.
    ui::MouseEvent mouse_move(ui::ET_MOUSE_MOVED, gfx::Point(20, 20),
                              gfx::Point(20, 20), base::TimeTicks(), 0, 0);
    ui::EventDispatchDetails details =
        host->dispatcher()->DispatchEvent(w2, &mouse_move);
    EXPECT_TRUE(details.dispatcher_destroyed);
  
    // Check events received by the two windows.
    EXPECT_EQ("MOUSE_EXITED", EventTypesToString(w1_filter.events()));
    EXPECT_EQ(std::string(), EventTypesToString(w2_filter.events()));
  }
  
  namespace {
  
  // Used to track if OnWindowDestroying() is invoked and if there is a valid
  // RootWindow at such time.
  class ValidRootDuringDestructionWindowObserver : public aura::WindowObserver {
   public:
    ValidRootDuringDestructionWindowObserver(bool* got_destroying,
                                             bool* has_valid_root)
        : got_destroying_(got_destroying),
          has_valid_root_(has_valid_root) {
    }
  
    // WindowObserver:
    void OnWindowDestroying(aura::Window* window) override {
      *got_destroying_ = true;
      *has_valid_root_ = (window->GetRootWindow() != NULL);
    }
  
   private:
    bool* got_destroying_;
    bool* has_valid_root_;
  
    DISALLOW_COPY_AND_ASSIGN(ValidRootDuringDestructionWindowObserver);
  };
  
  }  // namespace
  
  // Verifies GetRootWindow() from ~Window returns a valid root.
  TEST_P(WindowEventDispatcherTest, ValidRootDuringDestruction) {
    bool got_destroying = false;
    bool has_valid_root = false;
    ValidRootDuringDestructionWindowObserver observer(&got_destroying,
                                                      &has_valid_root);
    {
      std::unique_ptr<WindowTreeHost> host(
          WindowTreeHost::Create(gfx::Rect(0, 0, 100, 100)));
      host->InitHost();
      // Owned by WindowEventDispatcher.
      Window* w1 = CreateNormalWindow(1, host->window(), NULL);
      w1->AddObserver(&observer);
    }
    EXPECT_TRUE(got_destroying);
    EXPECT_TRUE(has_valid_root);
  }
  
  namespace {
  
  // See description above DontResetHeldEvent for details.
  class DontResetHeldEventWindowDelegate : public test::TestWindowDelegate {
   public:
    explicit DontResetHeldEventWindowDelegate(aura::Window* root)
        : root_(root),
          mouse_event_count_(0) {}
    ~DontResetHeldEventWindowDelegate() override {}
  
    int mouse_event_count() const { return mouse_event_count_; }
  
    // TestWindowDelegate:
    void OnMouseEvent(ui::MouseEvent* event) override {
      if ((event->flags() & ui::EF_SHIFT_DOWN) != 0 &&
          mouse_event_count_++ == 0) {
        ui::MouseEvent mouse_event(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
                                   gfx::Point(10, 10), ui::EventTimeForNow(),
                                   ui::EF_SHIFT_DOWN, 0);
        root_->GetHost()->dispatcher()->RepostEvent(&mouse_event);
      }
    }
  
   private:
    Window* root_;
    int mouse_event_count_;
  
    DISALLOW_COPY_AND_ASSIGN(DontResetHeldEventWindowDelegate);
  };
  
  }  // namespace
  
  // Verifies RootWindow doesn't reset |RootWindow::held_repostable_event_| after
  // dispatching. This is done by using DontResetHeldEventWindowDelegate, which
  // tracks the number of events with ui::EF_SHIFT_DOWN set (all reposted events
  // have EF_SHIFT_DOWN). When the first event is seen RepostEvent() is used to
  // schedule another reposted event.
  TEST_P(WindowEventDispatcherTest, DontResetHeldEvent) {
    DontResetHeldEventWindowDelegate delegate(root_window());
    std::unique_ptr<Window> w1(CreateNormalWindow(1, root_window(), &delegate));
    w1->SetBounds(gfx::Rect(0, 0, 40, 40));
    ui::MouseEvent pressed(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
                           gfx::Point(10, 10), ui::EventTimeForNow(),
                           ui::EF_SHIFT_DOWN, 0);
    root_window()->GetHost()->dispatcher()->RepostEvent(&pressed);
    ui::MouseEvent pressed2(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
                            gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    // Dispatch an event to flush event scheduled by way of RepostEvent().
    DispatchEventUsingWindowDispatcher(&pressed2);
    // Delegate should have seen reposted event (identified by way of
    // EF_SHIFT_DOWN). Dispatch another event to flush the second
    // RepostedEvent().
    EXPECT_EQ(1, delegate.mouse_event_count());
    DispatchEventUsingWindowDispatcher(&pressed2);
    EXPECT_EQ(2, delegate.mouse_event_count());
  }
  
  namespace {
  
  // See description above DeleteHostFromHeldMouseEvent for details.
  class DeleteHostFromHeldMouseEventDelegate
      : public test::TestWindowDelegate {
   public:
    explicit DeleteHostFromHeldMouseEventDelegate(WindowTreeHost* host)
        : host_(host),
          got_mouse_event_(false),
          got_destroy_(false) {
    }
    ~DeleteHostFromHeldMouseEventDelegate() override {}
  
    bool got_mouse_event() const { return got_mouse_event_; }
    bool got_destroy() const { return got_destroy_; }
  
    // TestWindowDelegate:
    void OnMouseEvent(ui::MouseEvent* event) override {
      if ((event->flags() & ui::EF_SHIFT_DOWN) != 0) {
        got_mouse_event_ = true;
        delete host_;
      }
    }
    void OnWindowDestroyed(Window* window) override { got_destroy_ = true; }
  
   private:
    WindowTreeHost* host_;
    bool got_mouse_event_;
    bool got_destroy_;
  
    DISALLOW_COPY_AND_ASSIGN(DeleteHostFromHeldMouseEventDelegate);
  };
  
  }  // namespace
  
  // Verifies if a WindowTreeHost is deleted from dispatching a held mouse event
  // we don't crash.
  TEST_P(WindowEventDispatcherTest, DeleteHostFromHeldMouseEvent) {
    // Should be deleted by |delegate|.
    WindowTreeHost* h2 = WindowTreeHost::Create(gfx::Rect(0, 0, 100, 100));
    h2->InitHost();
    DeleteHostFromHeldMouseEventDelegate delegate(h2);
    // Owned by |h2|.
    Window* w1 = CreateNormalWindow(1, h2->window(), &delegate);
    w1->SetBounds(gfx::Rect(0, 0, 40, 40));
    ui::MouseEvent pressed(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
                           gfx::Point(10, 10), ui::EventTimeForNow(),
                           ui::EF_SHIFT_DOWN, 0);
    h2->dispatcher()->RepostEvent(&pressed);
    // RunAllPendingInMessageLoop() to make sure the |pressed| is run.
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(delegate.got_mouse_event());
    EXPECT_TRUE(delegate.got_destroy());
  }
  
  TEST_P(WindowEventDispatcherTest, WindowHideCancelsActiveTouches) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));
  
    gfx::Point position1 = root_window()->bounds().origin();
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, position1, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);
  
    EXPECT_EQ("TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN",
              EventTypesToString(recorder.GetAndResetEvents()));
  
    window->Hide();
  
    EXPECT_EQ(ui::ET_TOUCH_CANCELLED, recorder.events()[0]);
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_TAP_CANCEL));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_END));
    EXPECT_EQ(3U, recorder.events().size());
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  TEST_P(WindowEventDispatcherTest, WindowHideCancelsActiveGestures) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));
  
    gfx::Point position1 = root_window()->bounds().origin();
    gfx::Point position2 = root_window()->bounds().CenterPoint();
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, position1, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);
  
    ui::TouchEvent move(
        ui::ET_TOUCH_MOVED, position2, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move);
  
    ui::TouchEvent press2(
        ui::ET_TOUCH_PRESSED, position1, 1, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press2);
  
    // TODO(tdresser): once the unified Gesture Recognizer has stuck, remove the
    // special casing here. See crbug.com/332418 for details.
    std::string expected =
        "TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN TOUCH_MOVED "
        "GESTURE_TAP_CANCEL GESTURE_SCROLL_BEGIN GESTURE_SCROLL_UPDATE "
        "TOUCH_PRESSED GESTURE_BEGIN GESTURE_PINCH_BEGIN";
  
    std::string expected_ugr =
        "TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN TOUCH_MOVED "
        "GESTURE_TAP_CANCEL GESTURE_SCROLL_BEGIN GESTURE_SCROLL_UPDATE "
        "TOUCH_PRESSED GESTURE_BEGIN";
  
    std::string events_string = EventTypesToString(recorder.GetAndResetEvents());
    EXPECT_TRUE((expected == events_string) || (expected_ugr == events_string));
  
    window->Hide();
  
    expected =
        "TOUCH_CANCELLED GESTURE_PINCH_END GESTURE_END TOUCH_CANCELLED "
        "GESTURE_SCROLL_END GESTURE_END";
    expected_ugr =
        "TOUCH_CANCELLED GESTURE_SCROLL_END GESTURE_END TOUCH_CANCELLED "
        "GESTURE_END";
  
    events_string = EventTypesToString(recorder.GetAndResetEvents());
    EXPECT_TRUE((expected == events_string) || (expected_ugr == events_string));
  
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // Places two windows side by side. Presses down on one window, and starts a
  // scroll. Sets capture on the other window and ensures that the "ending" events
  // aren't sent to the window which gained capture.
  TEST_P(WindowEventDispatcherTest, EndingEventDoesntRetarget) {
    EventFilterRecorder recorder1;
    EventFilterRecorder recorder2;
    std::unique_ptr<Window> window1(CreateNormalWindow(1, root_window(), NULL));
    window1->SetBounds(gfx::Rect(0, 0, 40, 40));
  
    std::unique_ptr<Window> window2(CreateNormalWindow(2, root_window(), NULL));
    window2->SetBounds(gfx::Rect(40, 0, 40, 40));
  
    window1->AddPreTargetHandler(&recorder1);
    window2->AddPreTargetHandler(&recorder2);
  
    gfx::Point position = window1->bounds().origin();
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, position, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);
  
    gfx::Point position2 = window1->bounds().CenterPoint();
    ui::TouchEvent move(
        ui::ET_TOUCH_MOVED, position2, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move);
  
    window2->SetCapture();
  
    EXPECT_EQ("TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN TOUCH_MOVED "
              "GESTURE_TAP_CANCEL GESTURE_SCROLL_BEGIN GESTURE_SCROLL_UPDATE "
              "TOUCH_CANCELLED GESTURE_SCROLL_END GESTURE_END",
              EventTypesToString(recorder1.events()));
  
    EXPECT_TRUE(recorder2.events().empty());
  }
  
  namespace {
  
  // This class creates and manages a window which is destroyed as soon as
  // capture is lost. This is the case for the drag and drop capture window.
  class CaptureWindowTracker : public test::TestWindowDelegate {
   public:
    CaptureWindowTracker() {}
    ~CaptureWindowTracker() override {}
  
    void CreateCaptureWindow(aura::Window* root_window) {
      capture_window_.reset(test::CreateTestWindowWithDelegate(
          this, -1234, gfx::Rect(20, 20, 20, 20), root_window));
      capture_window_->SetCapture();
    }
  
    void reset() {
      capture_window_.reset();
    }
  
    void OnCaptureLost() override { capture_window_.reset(); }
  
    void OnWindowDestroyed(Window* window) override {
      TestWindowDelegate::OnWindowDestroyed(window);
      capture_window_.reset();
    }
  
    aura::Window* capture_window() { return capture_window_.get(); }
  
   private:
    std::unique_ptr<aura::Window> capture_window_;
  
    DISALLOW_COPY_AND_ASSIGN(CaptureWindowTracker);
  };
  
  }
  
  // Verifies handling loss of capture by the capture window being hidden.
  TEST_P(WindowEventDispatcherTest, CaptureWindowHidden) {
    CaptureWindowTracker capture_window_tracker;
    capture_window_tracker.CreateCaptureWindow(root_window());
    capture_window_tracker.capture_window()->Hide();
    EXPECT_EQ(NULL, capture_window_tracker.capture_window());
  }
  
  // Verifies handling loss of capture by the capture window being destroyed.
  TEST_P(WindowEventDispatcherTest, CaptureWindowDestroyed) {
    CaptureWindowTracker capture_window_tracker;
    capture_window_tracker.CreateCaptureWindow(root_window());
    capture_window_tracker.reset();
    EXPECT_EQ(NULL, capture_window_tracker.capture_window());
  }
  
  class ExitMessageLoopOnMousePress : public ui::test::TestEventHandler {
   public:
    ExitMessageLoopOnMousePress() {}
    ~ExitMessageLoopOnMousePress() override {}
  
   protected:
    void OnMouseEvent(ui::MouseEvent* event) override {
      ui::test::TestEventHandler::OnMouseEvent(event);
      if (event->type() == ui::ET_MOUSE_PRESSED)
        base::MessageLoopForUI::current()->QuitWhenIdle();
    }
  
   private:
    DISALLOW_COPY_AND_ASSIGN(ExitMessageLoopOnMousePress);
  };
  
  class WindowEventDispatcherTestWithMessageLoop
      : public WindowEventDispatcherTest {
   public:
    WindowEventDispatcherTestWithMessageLoop() {}
    ~WindowEventDispatcherTestWithMessageLoop() override {}
  
    void RunTest() {
      // Reset any event the window may have received when bringing up the window
      // (e.g. mouse-move events if the mouse cursor is over the window).
      handler_.Reset();
  
      // Start a nested message-loop, post an event to be dispatched, and then
      // terminate the message-loop. When the message-loop unwinds and gets back,
      // the reposted event should not have fired.
      std::unique_ptr<ui::MouseEvent> mouse(new ui::MouseEvent(
          ui::ET_MOUSE_PRESSED, gfx::Point(10, 10), gfx::Point(10, 10),
          ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE));
      message_loop()->task_runner()->PostTask(
          FROM_HERE,
          base::Bind(&WindowEventDispatcherTestWithMessageLoop::RepostEventHelper,
                     host()->dispatcher(), base::Passed(&mouse)));
      message_loop()->task_runner()->PostTask(
          FROM_HERE, message_loop()->QuitWhenIdleClosure());
  
      base::MessageLoop::ScopedNestableTaskAllower allow(message_loop());
      base::RunLoop loop;
      loop.Run();
      EXPECT_EQ(0, handler_.num_mouse_events());
  
      // Let the current message-loop run. The event-handler will terminate the
      // message-loop when it receives the reposted event.
    }
  
    base::MessageLoop* message_loop() {
      return base::MessageLoopForUI::current();
    }
  
   protected:
    void SetUp() override {
      WindowEventDispatcherTest::SetUp();
      window_.reset(CreateNormalWindow(1, root_window(), NULL));
      window_->AddPreTargetHandler(&handler_);
    }
  
    void TearDown() override {
      window_.reset();
      WindowEventDispatcherTest::TearDown();
    }
  
   private:
    // Used to avoid a copying |event| when binding to a closure.
    static void RepostEventHelper(WindowEventDispatcher* dispatcher,
                                  std::unique_ptr<ui::MouseEvent> event) {
      dispatcher->RepostEvent(event.get());
    }
  
    std::unique_ptr<Window> window_;
    ExitMessageLoopOnMousePress handler_;
  
    DISALLOW_COPY_AND_ASSIGN(WindowEventDispatcherTestWithMessageLoop);
  };
  
  TEST_P(WindowEventDispatcherTestWithMessageLoop, EventRepostedInNonNestedLoop) {
    CHECK(!message_loop()->is_running());
    // Perform the test in a callback, so that it runs after the message-loop
    // starts.
    message_loop()->task_runner()->PostTask(
        FROM_HERE, base::Bind(&WindowEventDispatcherTestWithMessageLoop::RunTest,
                              base::Unretained(this)));
    base::RunLoop().Run();
  }
  
  class WindowEventDispatcherTestInHighDPI : public WindowEventDispatcherTest {
   public:
    WindowEventDispatcherTestInHighDPI() {}
    ~WindowEventDispatcherTestInHighDPI() override {}
  
    void DispatchEvent(ui::Event* event) {
      DispatchEventUsingWindowDispatcher(event);
    }
  
   protected:
    void SetUp() override {
      WindowEventDispatcherTest::SetUp();
      test_screen()->SetDeviceScaleFactor(2.f);
    }
  };
  
  TEST_P(WindowEventDispatcherTestInHighDPI, EventLocationTransform) {
    test::TestWindowDelegate delegate;
    std::unique_ptr<aura::Window> child(test::CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(20, 20, 100, 100), root_window()));
    child->Show();
  
    ui::test::TestEventHandler handler_child;
    ui::test::TestEventHandler handler_root;
    root_window()->AddPreTargetHandler(&handler_root);
    child->AddPreTargetHandler(&handler_child);
  
    {
      ui::MouseEvent move(ui::ET_MOUSE_MOVED, gfx::Point(30, 30),
                          gfx::Point(30, 30), ui::EventTimeForNow(), ui::EF_NONE,
                          ui::EF_NONE);
      DispatchEventUsingWindowDispatcher(&move);
      EXPECT_EQ(0, handler_child.num_mouse_events());
      EXPECT_EQ(1, handler_root.num_mouse_events());
    }
  
    {
      ui::MouseEvent move(ui::ET_MOUSE_MOVED, gfx::Point(50, 50),
                          gfx::Point(50, 50), ui::EventTimeForNow(), ui::EF_NONE,
                          ui::EF_NONE);
      DispatchEventUsingWindowDispatcher(&move);
      // The child receives an ENTER, and a MOVED event.
      EXPECT_EQ(2, handler_child.num_mouse_events());
      // The root receives both the ENTER and the MOVED events dispatched to
      // |child|, as well as an EXIT event.
      EXPECT_EQ(3, handler_root.num_mouse_events());
    }
  
    child->RemovePreTargetHandler(&handler_child);
    root_window()->RemovePreTargetHandler(&handler_root);
  }
  
  TEST_P(WindowEventDispatcherTestInHighDPI, TouchMovesHeldOnScroll) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
    test::TestWindowDelegate delegate;
    HoldPointerOnScrollHandler handler(host()->dispatcher(), &recorder);
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));
    window->AddPreTargetHandler(&handler);
  
    ui::test::EventGenerator generator(root_window());
    generator.GestureScrollSequence(
        gfx::Point(120, 120), gfx::Point(20, 120),
        base::TimeDelta::FromMilliseconds(100), 25);
  
    // |handler| will have reset |filter| and started holding the touch-move
    // events when scrolling started. At the end of the scroll (i.e. upon
    // touch-release), the held touch-move event will have been dispatched first,
    // along with the subsequent events (i.e. touch-release, scroll-end, and
    // gesture-end).
    const EventFilterRecorder::Events& events = recorder.events();
    EXPECT_EQ(
        "TOUCH_MOVED GESTURE_SCROLL_UPDATE TOUCH_RELEASED "
        "GESTURE_SCROLL_END GESTURE_END",
        EventTypesToString(events));
    ASSERT_EQ(2u, recorder.touch_locations().size());
    EXPECT_EQ(gfx::Point(-40, 10).ToString(),
              recorder.touch_locations()[0].ToString());
    EXPECT_EQ(gfx::Point(-40, 10).ToString(),
              recorder.touch_locations()[1].ToString());
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // This handler triggers a nested message loop when it receives a right click
  // event, and runs a single callback in the nested message loop.
  class TriggerNestedLoopOnRightMousePress : public ui::test::TestEventHandler {
   public:
    explicit TriggerNestedLoopOnRightMousePress(const base::Closure& callback)
        : callback_(callback) {}
    ~TriggerNestedLoopOnRightMousePress() override {}
  
    const gfx::Point mouse_move_location() const { return mouse_move_location_; }
  
   private:
    void OnMouseEvent(ui::MouseEvent* mouse) override {
      TestEventHandler::OnMouseEvent(mouse);
      if (mouse->type() == ui::ET_MOUSE_PRESSED &&
          mouse->IsOnlyRightMouseButton()) {
        base::MessageLoop::ScopedNestableTaskAllower allow(
            base::MessageLoopForUI::current());
        base::RunLoop run_loop;
        scoped_refptr<base::TaskRunner> task_runner =
            base::ThreadTaskRunnerHandle::Get();
        if (!callback_.is_null())
          task_runner->PostTask(FROM_HERE, callback_);
        task_runner->PostTask(FROM_HERE, run_loop.QuitClosure());
        run_loop.Run();
      } else if (mouse->type() == ui::ET_MOUSE_MOVED) {
        mouse_move_location_ = mouse->location();
      }
    }
  
    base::Closure callback_;
    gfx::Point mouse_move_location_;
  
    DISALLOW_COPY_AND_ASSIGN(TriggerNestedLoopOnRightMousePress);
  };
  
  // Tests that if dispatching a 'held' event triggers a nested message loop, then
  // the events that are dispatched from the nested message loop are transformed
  // correctly.
  TEST_P(WindowEventDispatcherTestInHighDPI,
         EventsTransformedInRepostedEventTriggeredNestedLoop) {
    std::unique_ptr<Window> window(CreateNormalWindow(1, root_window(), NULL));
    // Make sure the window is visible.
    RunAllPendingInMessageLoop();
  
    ui::MouseEvent mouse_move(ui::ET_MOUSE_MOVED, gfx::Point(80, 80),
                              gfx::Point(80, 80), ui::EventTimeForNow(),
                              ui::EF_NONE, ui::EF_NONE);
    const base::Closure callback_on_right_click = base::Bind(
        base::IgnoreResult(&WindowEventDispatcherTestInHighDPI::DispatchEvent),
        base::Unretained(this), base::Unretained(&mouse_move));
    TriggerNestedLoopOnRightMousePress handler(callback_on_right_click);
    window->AddPreTargetHandler(&handler);
  
    std::unique_ptr<ui::MouseEvent> mouse(
        new ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
                           gfx::Point(10, 10), ui::EventTimeForNow(),
                           ui::EF_RIGHT_MOUSE_BUTTON, ui::EF_RIGHT_MOUSE_BUTTON));
    host()->dispatcher()->RepostEvent(mouse.get());
    EXPECT_EQ(0, handler.num_mouse_events());
  
    base::RunLoop run_loop;
    run_loop.RunUntilIdle();
    // The window should receive the mouse-press and the mouse-move events.
    EXPECT_EQ(2, handler.num_mouse_events());
    // The mouse-move event location should be transformed because of the DSF
    // before it reaches the window.
    EXPECT_EQ(gfx::Point(40, 40).ToString(),
              handler.mouse_move_location().ToString());
    EXPECT_EQ(gfx::Point(40, 40).ToString(),
              Env::GetInstance()->last_mouse_location().ToString());
    window->RemovePreTargetHandler(&handler);
  }
  
  class SelfDestructDelegate : public test::TestWindowDelegate {
   public:
    SelfDestructDelegate() {}
    ~SelfDestructDelegate() override {}
  
    void OnMouseEvent(ui::MouseEvent* event) override { window_.reset(); }
  
    void set_window(std::unique_ptr<aura::Window> window) {
      window_ = std::move(window);
    }
    bool has_window() const { return !!window_.get(); }
  
   private:
    std::unique_ptr<aura::Window> window_;
    DISALLOW_COPY_AND_ASSIGN(SelfDestructDelegate);
  };
  
  TEST_P(WindowEventDispatcherTest, SynthesizedLocatedEvent) {
    ui::test::EventGenerator generator(root_window());
    generator.MoveMouseTo(10, 10);
    EXPECT_EQ("10,10",
              Env::GetInstance()->last_mouse_location().ToString());
  
    // Synthesized event should not update the mouse location.
    ui::MouseEvent mouseev(ui::ET_MOUSE_MOVED, gfx::Point(), gfx::Point(),
                           ui::EventTimeForNow(), ui::EF_IS_SYNTHESIZED, 0);
    generator.Dispatch(&mouseev);
    EXPECT_EQ("10,10",
              Env::GetInstance()->last_mouse_location().ToString());
  
    generator.MoveMouseTo(0, 0);
    EXPECT_EQ("0,0",
              Env::GetInstance()->last_mouse_location().ToString());
  
    // Make sure the location gets updated when a syntheiszed enter
    // event destroyed the window.
    SelfDestructDelegate delegate;
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));
    delegate.set_window(std::move(window));
    EXPECT_TRUE(delegate.has_window());
  
    generator.MoveMouseTo(100, 100);
    EXPECT_FALSE(delegate.has_window());
    EXPECT_EQ("100,100",
              Env::GetInstance()->last_mouse_location().ToString());
  }
  
  // Tests that the window which has capture can get destroyed as a result of
  // ui::ET_MOUSE_CAPTURE_CHANGED event dispatched in
  // WindowEventDispatcher::UpdateCapture without causing a "use after free".
  TEST_P(WindowEventDispatcherTest, DestroyWindowOnCaptureChanged) {
    SelfDestructDelegate delegate;
    std::unique_ptr<aura::Window> window_first(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(20, 10, 10, 20), root_window()));
    Window* window_first_raw = window_first.get();
    window_first->Show();
    window_first->SetCapture();
    delegate.set_window(std::move(window_first));
    EXPECT_TRUE(delegate.has_window());
  
    std::unique_ptr<aura::Window> window_second(
        test::CreateTestWindowWithId(2, root_window()));
    window_second->Show();
  
    client::CaptureDelegate* capture_delegate = host()->dispatcher();
    capture_delegate->UpdateCapture(window_first_raw, window_second.get());
    EXPECT_FALSE(delegate.has_window());
  }
  
  class StaticFocusClient : public client::FocusClient {
   public:
    explicit StaticFocusClient(Window* focused)
        : focused_(focused) {}
    ~StaticFocusClient() override {}
  
   private:
    // client::FocusClient:
    void AddObserver(client::FocusChangeObserver* observer) override {}
    void RemoveObserver(client::FocusChangeObserver* observer) override {}
    void FocusWindow(Window* window) override {}
    void ResetFocusWithinActiveWindow(Window* window) override {}
    Window* GetFocusedWindow() override { return focused_; }
  
    Window* focused_;
  
    DISALLOW_COPY_AND_ASSIGN(StaticFocusClient);
  };
  
  // Tests that host-cancel-mode event can be dispatched to a dispatcher safely
  // when the focused window does not live in the dispatcher's tree.
  TEST_P(WindowEventDispatcherTest, HostCancelModeWithFocusedWindowOutside) {
    test::TestWindowDelegate delegate;
    std::unique_ptr<Window> focused(CreateTestWindowWithDelegate(
        &delegate, 123, gfx::Rect(20, 30, 100, 50), NULL));
    StaticFocusClient focus_client(focused.get());
    client::SetFocusClient(root_window(), &focus_client);
    EXPECT_FALSE(root_window()->Contains(focused.get()));
    EXPECT_EQ(focused.get(),
              client::GetFocusClient(root_window())->GetFocusedWindow());
    host()->dispatcher()->DispatchCancelModeEvent();
    EXPECT_EQ(focused.get(),
              client::GetFocusClient(root_window())->GetFocusedWindow());
  }
  
  // Dispatches a mouse-move event to |target| when it receives a mouse-move
  // event.
  class DispatchEventHandler : public ui::EventHandler {
   public:
    explicit DispatchEventHandler(Window* target)
        : target_(target),
          dispatched_(false) {}
    ~DispatchEventHandler() override {}
  
    bool dispatched() const { return dispatched_; }
   private:
    // ui::EventHandler:
    void OnMouseEvent(ui::MouseEvent* mouse) override {
      if (mouse->type() == ui::ET_MOUSE_MOVED) {
        ui::MouseEvent move(ui::ET_MOUSE_MOVED, target_->bounds().CenterPoint(),
                            target_->bounds().CenterPoint(),
                            ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
        ui::EventDispatchDetails details =
            target_->GetHost()->dispatcher()->OnEventFromSource(&move);
        ASSERT_FALSE(details.dispatcher_destroyed);
        EXPECT_FALSE(details.target_destroyed);
        EXPECT_EQ(target_, move.target());
        dispatched_ = true;
      }
      ui::EventHandler::OnMouseEvent(mouse);
    }
  
    Window* target_;
    bool dispatched_;
  
    DISALLOW_COPY_AND_ASSIGN(DispatchEventHandler);
  };
  
  // Moves |window| to |root_window| when it receives a mouse-move event.
  class MoveWindowHandler : public ui::EventHandler {
   public:
    MoveWindowHandler(Window* window, Window* root_window)
        : window_to_move_(window),
          root_window_to_move_to_(root_window) {}
    ~MoveWindowHandler() override {}
  
   private:
    // ui::EventHandler:
    void OnMouseEvent(ui::MouseEvent* mouse) override {
      if (mouse->type() == ui::ET_MOUSE_MOVED) {
        root_window_to_move_to_->AddChild(window_to_move_);
      }
      ui::EventHandler::OnMouseEvent(mouse);
    }
  
    Window* window_to_move_;
    Window* root_window_to_move_to_;
  
    DISALLOW_COPY_AND_ASSIGN(MoveWindowHandler);
  };
  
  // Tests that nested event dispatch works correctly if the target of the older
  // event being dispatched is moved to a different dispatcher in response to an
  // event in the inner loop.
  TEST_P(WindowEventDispatcherTest, NestedEventDispatchTargetMoved) {
    std::unique_ptr<WindowTreeHost> second_host(
        WindowTreeHost::Create(gfx::Rect(20, 30, 100, 50)));
    second_host->InitHost();
    Window* second_root = second_host->window();
  
    // Create two windows parented to |root_window()|.
    test::TestWindowDelegate delegate;
    std::unique_ptr<Window> first(CreateTestWindowWithDelegate(
        &delegate, 123, gfx::Rect(20, 10, 10, 20), root_window()));
    std::unique_ptr<Window> second(CreateTestWindowWithDelegate(
        &delegate, 234, gfx::Rect(40, 10, 50, 20), root_window()));
  
    // Setup a handler on |first| so that it dispatches an event to |second| when
    // |first| receives an event.
    DispatchEventHandler dispatch_event(second.get());
    first->AddPreTargetHandler(&dispatch_event);
  
    // Setup a handler on |second| so that it moves |first| into |second_root|
    // when |second| receives an event.
    MoveWindowHandler move_window(first.get(), second_root);
    second->AddPreTargetHandler(&move_window);
  
    // Some sanity checks: |first| is inside |root_window()|'s tree.
    EXPECT_EQ(root_window(), first->GetRootWindow());
    // The two root windows are different.
    EXPECT_NE(root_window(), second_root);
  
    // Dispatch an event to |first|.
    ui::MouseEvent move(ui::ET_MOUSE_MOVED, first->bounds().CenterPoint(),
                        first->bounds().CenterPoint(), ui::EventTimeForNow(),
                        ui::EF_NONE, ui::EF_NONE);
    ui::EventDispatchDetails details =
        host()->dispatcher()->OnEventFromSource(&move);
    ASSERT_FALSE(details.dispatcher_destroyed);
    EXPECT_TRUE(details.target_destroyed);
    EXPECT_EQ(first.get(), move.target());
    EXPECT_TRUE(dispatch_event.dispatched());
    EXPECT_EQ(second_root, first->GetRootWindow());
  
    first->RemovePreTargetHandler(&dispatch_event);
    second->RemovePreTargetHandler(&move_window);
  }
  
  class AlwaysMouseDownInputStateLookup : public InputStateLookup {
   public:
    AlwaysMouseDownInputStateLookup() {}
    ~AlwaysMouseDownInputStateLookup() override {}
  
   private:
    // InputStateLookup:
    bool IsMouseButtonDown() const override { return true; }
  
    DISALLOW_COPY_AND_ASSIGN(AlwaysMouseDownInputStateLookup);
  };
  
  TEST_P(WindowEventDispatcherTest,
         CursorVisibilityChangedWhileCaptureWindowInAnotherDispatcher) {
    test::EventCountDelegate delegate;
    std::unique_ptr<Window> window(CreateTestWindowWithDelegate(
        &delegate, 123, gfx::Rect(20, 10, 10, 20), root_window()));
    window->Show();
  
    std::unique_ptr<WindowTreeHost> second_host(
        WindowTreeHost::Create(gfx::Rect(20, 30, 100, 50)));
    second_host->InitHost();
    WindowEventDispatcher* second_dispatcher = second_host->dispatcher();
  
    // Install an InputStateLookup on the Env that always claims that a
    // mouse-button is down.
    test::EnvTestHelper(Env::GetInstance())
        .SetInputStateLookup(std::unique_ptr<InputStateLookup>(
            new AlwaysMouseDownInputStateLookup()));
  
    window->SetCapture();
  
    // Because the mouse button is down, setting the capture on |window| will set
    // it as the mouse-move handler for |root_window()|.
    EXPECT_EQ(window.get(), host()->dispatcher()->mouse_moved_handler());
  
    // This does not set |window| as the mouse-move handler for the second
    // dispatcher.
    EXPECT_EQ(NULL, second_dispatcher->mouse_moved_handler());
  
    // However, some capture-client updates the capture in each root-window on a
    // capture. Emulate that here. Because of this, the second dispatcher also has
    // |window| as the mouse-move handler.
    client::CaptureDelegate* second_capture_delegate = second_dispatcher;
    second_capture_delegate->UpdateCapture(NULL, window.get());
    EXPECT_EQ(window.get(), second_dispatcher->mouse_moved_handler());
  
    // Reset the mouse-event counts for |window|.
    delegate.GetMouseMotionCountsAndReset();
  
    // Notify both hosts that the cursor is now hidden. This should send a single
    // mouse-exit event to |window|.
    host()->OnCursorVisibilityChanged(false);
    second_host->OnCursorVisibilityChanged(false);
    EXPECT_EQ("0 0 1", delegate.GetMouseMotionCountsAndReset());
  }
  
  TEST_P(WindowEventDispatcherTest,
         RedirectedEventToDifferentDispatcherLocation) {
    std::unique_ptr<WindowTreeHost> second_host(
        WindowTreeHost::Create(gfx::Rect(20, 30, 100, 50)));
    second_host->InitHost();
    client::SetCaptureClient(second_host->window(),
                             client::GetCaptureClient(root_window()));
  
    test::EventCountDelegate delegate;
    std::unique_ptr<Window> window_first(CreateTestWindowWithDelegate(
        &delegate, 123, gfx::Rect(20, 10, 10, 20), root_window()));
    window_first->Show();
  
    std::unique_ptr<Window> window_second(CreateTestWindowWithDelegate(
        &delegate, 12, gfx::Rect(10, 10, 20, 30), second_host->window()));
    window_second->Show();
  
    window_second->SetCapture();
    EXPECT_EQ(window_second.get(),
              client::GetCaptureWindow(root_window()));
  
    // Send an event to the first host. Make sure it goes to |window_second| in
    // |second_host| instead (since it has capture).
    EventFilterRecorder recorder_first;
    window_first->AddPreTargetHandler(&recorder_first);
    EventFilterRecorder recorder_second;
    window_second->AddPreTargetHandler(&recorder_second);
    const gfx::Point event_location(25, 15);
    ui::MouseEvent mouse(ui::ET_MOUSE_PRESSED, event_location, event_location,
                         ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
                         ui::EF_LEFT_MOUSE_BUTTON);
    DispatchEventUsingWindowDispatcher(&mouse);
    EXPECT_TRUE(recorder_first.events().empty());
    ASSERT_EQ(1u, recorder_second.events().size());
    EXPECT_EQ(ui::ET_MOUSE_PRESSED, recorder_second.events()[0]);
    EXPECT_EQ(event_location.ToString(),
              recorder_second.mouse_locations()[0].ToString());
  }
  
  class AsyncWindowDelegate : public test::TestWindowDelegate {
   public:
    AsyncWindowDelegate(WindowEventDispatcher* dispatcher)
        : dispatcher_(dispatcher), window_(nullptr) {}
  
    void set_window(Window* window) {
      window_ = window;
    }
   private:
    void OnTouchEvent(ui::TouchEvent* event) override {
      // Convert touch event back to root window coordinates.
      event->ConvertLocationToTarget(window_, window_->GetRootWindow());
      event->DisableSynchronousHandling();
      dispatcher_->ProcessedTouchEvent(event->unique_event_id(), window_,
                                       ui::ER_UNHANDLED);
      event->StopPropagation();
    }
  
    WindowEventDispatcher* dispatcher_;
    Window* window_;
  
    DISALLOW_COPY_AND_ASSIGN(AsyncWindowDelegate);
  };
  
  // Tests that gesture events dispatched through the asynchronous flow have
  // co-ordinates in the right co-ordinate space.
  TEST_P(WindowEventDispatcherTest, GestureEventCoordinates) {
    const float kX = 67.3f;
    const float kY = 97.8f;
  
    const int kWindowOffset = 50;
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
    AsyncWindowDelegate delegate(host()->dispatcher());
    HoldPointerOnScrollHandler handler(host()->dispatcher(), &recorder);
    std::unique_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(kWindowOffset, kWindowOffset, 100, 100),
        root_window()));
    window->AddPreTargetHandler(&handler);
  
    delegate.set_window(window.get());
  
    ui::TouchEvent touch_pressed_event(ui::ET_TOUCH_PRESSED, gfx::Point(), 0,
                                       ui::EventTimeForNow());
    touch_pressed_event.set_location_f(gfx::PointF(kX, kY));
    touch_pressed_event.set_root_location_f(gfx::PointF(kX, kY));
  
    DispatchEventUsingWindowDispatcher(&touch_pressed_event);
  
    ASSERT_EQ(1u, recorder.touch_locations().size());
    EXPECT_EQ(gfx::Point(kX - kWindowOffset, kY - kWindowOffset).ToString(),
              recorder.touch_locations()[0].ToString());
  
    ASSERT_EQ(2u, recorder.gesture_locations().size());
    EXPECT_EQ(gfx::Point(kX - kWindowOffset, kY - kWindowOffset).ToString(),
              recorder.gesture_locations()[0].ToString());
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // Tests that a scroll-generating touch-event is marked as such.
  TEST_P(WindowEventDispatcherTest, TouchMovesMarkedWhenCausingScroll) {
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
  
    const gfx::Point location(20, 20);
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, location, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);
    EXPECT_FALSE(recorder.LastTouchMayCauseScrolling());
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_PRESSED));
    recorder.Reset();
  
    ui::TouchEvent move(ui::ET_TOUCH_MOVED,
                        location + gfx::Vector2d(100, 100),
                        0,
                        ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move);
    EXPECT_TRUE(recorder.LastTouchMayCauseScrolling());
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_BEGIN));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_UPDATE));
    recorder.Reset();
  
    ui::TouchEvent move2(ui::ET_TOUCH_MOVED,
                         location + gfx::Vector2d(200, 200),
                         0,
                         ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move2);
    EXPECT_TRUE(recorder.LastTouchMayCauseScrolling());
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_UPDATE));
    recorder.Reset();
  
    // Delay the release to avoid fling generation.
    ui::TouchEvent release(
        ui::ET_TOUCH_RELEASED, location + gfx::Vector2d(200, 200), 0,
        ui::EventTimeForNow() + base::TimeDelta::FromSeconds(1));
    DispatchEventUsingWindowDispatcher(&release);
    EXPECT_TRUE(recorder.LastTouchMayCauseScrolling());
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_RELEASED));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_END));
  
    root_window()->RemovePreTargetHandler(&recorder);
  }
  
  // OnCursorMovedToRootLocation() is sometimes called instead of
  // WindowTreeHost::MoveCursorTo() when the cursor did not move but the
  // cursor's position in root coordinates has changed (e.g. when the displays's
  // scale factor changed). Test that hover effects are properly updated.
  TEST_P(WindowEventDispatcherTest, OnCursorMovedToRootLocationUpdatesHover) {
    WindowEventDispatcher* dispatcher = host()->dispatcher();
  
    std::unique_ptr<Window> w(CreateNormalWindow(1, root_window(), nullptr));
    w->SetBounds(gfx::Rect(20, 20, 20, 20));
    w->Show();
  
    // Move the cursor off of |w|.
    dispatcher->OnCursorMovedToRootLocation(gfx::Point(100, 100));
  
    EventFilterRecorder recorder;
    w->AddPreTargetHandler(&recorder);
    dispatcher->OnCursorMovedToRootLocation(gfx::Point(22, 22));
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_MOUSE_ENTERED));
    recorder.Reset();
  
    // The cursor should not be over |w| after changing the device scale factor to
    // 2x. A ET_MOUSE_EXITED event should have been sent to |w|.
    test_screen()->SetDeviceScaleFactor(2.f);
    dispatcher->OnCursorMovedToRootLocation(gfx::Point(11, 11));
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_MOUSE_EXITED));
  
    w->RemovePreTargetHandler(&recorder);
  }
  
  INSTANTIATE_TEST_CASE_P(/* no prefix */,
                          WindowEventDispatcherTest,
                          ::testing::Values(test::BackendType::CLASSIC,
                                            test::BackendType::MUS));
  
  INSTANTIATE_TEST_CASE_P(/* no prefix */,
                          WindowEventDispatcherTestWithMessageLoop,
                          ::testing::Values(test::BackendType::CLASSIC,
                                            test::BackendType::MUS));
  
  INSTANTIATE_TEST_CASE_P(/* no prefix */,
                          WindowEventDispatcherTestInHighDPI,
                          ::testing::Values(test::BackendType::CLASSIC,
                                            test::BackendType::MUS));
  
  }  // namespace aura
  