Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/test/event_generator.cc

+// Copyright 2014 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/events/test/event_generator.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
+#include "base/time/tick_clock.h"
+#include "ui/events/event.h"
+#include "ui/events/event_source.h"
+#include "ui/events/event_utils.h"
+#include "ui/events/test/events_test_utils.h"
+#include "ui/gfx/geometry/vector2d_conversions.h"
+
+#if defined(USE_X11)
+#include <X11/Xlib.h>
+#include "ui/events/test/events_test_utils_x11.h"
+#endif
+
+#if defined(OS_WIN)
+#include "ui/events/keycodes/keyboard_code_conversion.h"
+#endif
+
+namespace ui {
+namespace test {
+namespace {
+
+void DummyCallback(EventType, const gfx::Vector2dF&) {
+}
+
+class TestTickClock : public base::TickClock {
+ public:
+  // Starts off with a clock set to TimeTicks().
+  TestTickClock() {}
+
+  base::TimeTicks NowTicks() override {
+    return base::TimeTicks::FromInternalValue(ticks_++ * 1000);
+  }
+
+ private:
+  int64 ticks_ = 1;
+
+  DISALLOW_COPY_AND_ASSIGN(TestTickClock);
+};
+
+class TestKeyEvent : public ui::KeyEvent {
+ public:
+  TestKeyEvent(const base::NativeEvent& native_event, int flags)
+      : KeyEvent(native_event) {
+    set_flags(flags);
+  }
+};
+
+class TestTouchEvent : public ui::TouchEvent {
+ public:
+  TestTouchEvent(ui::EventType type,
+                 const gfx::Point& root_location,
+                 int touch_id,
+                 int flags,
+                 base::TimeDelta timestamp)
+      : TouchEvent(type, root_location, flags, touch_id, timestamp,
+                   1.0f, 1.0f, 0.0f, 0.0f) {
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TestTouchEvent);
+};
+
+const int kAllButtonMask = ui::EF_LEFT_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON;
+
+}  // namespace
+
+EventGeneratorDelegate* EventGenerator::default_delegate = NULL;
+
+EventGenerator::EventGenerator(gfx::NativeWindow root_window)
+    : current_target_(NULL),
+      flags_(0),
+      grab_(false),
+      async_(false),
+      targeting_application_(false),
+      tick_clock_(new TestTickClock()) {
+  Init(root_window, NULL);
+}
+
+EventGenerator::EventGenerator(gfx::NativeWindow root_window,
+                               const gfx::Point& point)
+    : current_location_(point),
+      current_target_(NULL),
+      flags_(0),
+      grab_(false),
+      async_(false),
+      targeting_application_(false),
+      tick_clock_(new TestTickClock()) {
+  Init(root_window, NULL);
+}
+
+EventGenerator::EventGenerator(gfx::NativeWindow root_window,
+                               gfx::NativeWindow window)
+    : current_target_(NULL),
+      flags_(0),
+      grab_(false),
+      async_(false),
+      targeting_application_(false),
+      tick_clock_(new TestTickClock()) {
+  Init(root_window, window);
+}
+
+EventGenerator::EventGenerator(EventGeneratorDelegate* delegate)
+    : delegate_(delegate),
+      current_target_(NULL),
+      flags_(0),
+      grab_(false),
+      async_(false),
+      targeting_application_(false),
+      tick_clock_(new TestTickClock()) {
+  Init(NULL, NULL);
+}
+
+EventGenerator::~EventGenerator() {
+  for (std::list<ui::Event*>::iterator i = pending_events_.begin();
+      i != pending_events_.end(); ++i)
+    delete *i;
+  pending_events_.clear();
+  delegate()->SetContext(NULL, NULL, NULL);
+}
+
+void EventGenerator::PressLeftButton() {
+  PressButton(ui::EF_LEFT_MOUSE_BUTTON);
+}
+
+void EventGenerator::ReleaseLeftButton() {
+  ReleaseButton(ui::EF_LEFT_MOUSE_BUTTON);
+}
+
+void EventGenerator::ClickLeftButton() {
+  PressLeftButton();
+  ReleaseLeftButton();
+}
+
+void EventGenerator::DoubleClickLeftButton() {
+  flags_ &= ~ui::EF_IS_DOUBLE_CLICK;
+  ClickLeftButton();
+  flags_ |= ui::EF_IS_DOUBLE_CLICK;
+  ClickLeftButton();
+  flags_ &= ~ui::EF_IS_DOUBLE_CLICK;
+}
+
+void EventGenerator::PressRightButton() {
+  PressButton(ui::EF_RIGHT_MOUSE_BUTTON);
+}
+
+void EventGenerator::ReleaseRightButton() {
+  ReleaseButton(ui::EF_RIGHT_MOUSE_BUTTON);
+}
+
+void EventGenerator::MoveMouseWheel(int delta_x, int delta_y) {
+  gfx::Point location = GetLocationInCurrentRoot();
+  ui::MouseEvent mouseev(ui::ET_MOUSEWHEEL, location, location,
+                         ui::EventTimeForNow(), flags_, 0);
+  ui::MouseWheelEvent wheelev(mouseev, delta_x, delta_y);
+  Dispatch(&wheelev);
+}
+
+void EventGenerator::SendMouseExit() {
+  gfx::Point exit_location(current_location_);
+  delegate()->ConvertPointToTarget(current_target_, &exit_location);
+  ui::MouseEvent mouseev(ui::ET_MOUSE_EXITED, exit_location, exit_location,
+                         ui::EventTimeForNow(), flags_, 0);
+  Dispatch(&mouseev);
+}
+
+void EventGenerator::MoveMouseToInHost(const gfx::Point& point_in_host) {
+  const ui::EventType event_type = (flags_ & ui::EF_LEFT_MOUSE_BUTTON) ?
+      ui::ET_MOUSE_DRAGGED : ui::ET_MOUSE_MOVED;
+  ui::MouseEvent mouseev(event_type, point_in_host, point_in_host,
+                         ui::EventTimeForNow(), flags_, 0);
+  Dispatch(&mouseev);
+
+  current_location_ = point_in_host;
+  delegate()->ConvertPointFromHost(current_target_, &current_location_);
+}
+
+void EventGenerator::MoveMouseTo(const gfx::Point& point_in_screen,
+                                 int count) {
+  DCHECK_GT(count, 0);
+  const ui::EventType event_type = (flags_ & ui::EF_LEFT_MOUSE_BUTTON) ?
+      ui::ET_MOUSE_DRAGGED : ui::ET_MOUSE_MOVED;
+
+  gfx::Vector2dF diff(point_in_screen - current_location_);
+  for (float i = 1; i <= count; i++) {
+    gfx::Vector2dF step(diff);
+    step.Scale(i / count);
+    gfx::Point move_point = current_location_ + gfx::ToRoundedVector2d(step);
+    if (!grab_)
+      UpdateCurrentDispatcher(move_point);
+    delegate()->ConvertPointToTarget(current_target_, &move_point);
+    ui::MouseEvent mouseev(event_type, move_point, move_point,
+                           ui::EventTimeForNow(), flags_, 0);
+    Dispatch(&mouseev);
+  }
+  current_location_ = point_in_screen;
+}
+
+void EventGenerator::MoveMouseRelativeTo(const EventTarget* window,
+                                         const gfx::Point& point_in_parent) {
+  gfx::Point point(point_in_parent);
+  delegate()->ConvertPointFromTarget(window, &point);
+  MoveMouseTo(point);
+}
+
+void EventGenerator::DragMouseTo(const gfx::Point& point) {
+  PressLeftButton();
+  MoveMouseTo(point);
+  ReleaseLeftButton();
+}
+
+void EventGenerator::MoveMouseToCenterOf(EventTarget* window) {
+  MoveMouseTo(CenterOfWindow(window));
+}
+
+void EventGenerator::PressTouch() {
+  PressTouchId(0);
+}
+
+void EventGenerator::PressTouchId(int touch_id) {
+  TestTouchEvent touchev(
+      ui::ET_TOUCH_PRESSED, GetLocationInCurrentRoot(), touch_id, flags_,
+      Now());
+  Dispatch(&touchev);
+}
+
+void EventGenerator::MoveTouch(const gfx::Point& point) {
+  MoveTouchId(point, 0);
+}
+
+void EventGenerator::MoveTouchId(const gfx::Point& point, int touch_id) {
+  current_location_ = point;
+  TestTouchEvent touchev(
+      ui::ET_TOUCH_MOVED, GetLocationInCurrentRoot(), touch_id, flags_,
+      Now());
+  Dispatch(&touchev);
+
+  if (!grab_)
+    UpdateCurrentDispatcher(point);
+}
+
+void EventGenerator::ReleaseTouch() {
+  ReleaseTouchId(0);
+}
+
+void EventGenerator::ReleaseTouchId(int touch_id) {
+  TestTouchEvent touchev(
+      ui::ET_TOUCH_RELEASED, GetLocationInCurrentRoot(), touch_id, flags_,
+      Now());
+  Dispatch(&touchev);
+}
+
+void EventGenerator::PressMoveAndReleaseTouchTo(const gfx::Point& point) {
+  PressTouch();
+  MoveTouch(point);
+  ReleaseTouch();
+}
+
+void EventGenerator::PressMoveAndReleaseTouchToCenterOf(EventTarget* window) {
+  PressMoveAndReleaseTouchTo(CenterOfWindow(window));
+}
+
+void EventGenerator::GestureEdgeSwipe() {
+  ui::GestureEvent gesture(
+      0, 0, 0, Now(), ui::GestureEventDetails(ui::ET_GESTURE_WIN8_EDGE_SWIPE));
+  Dispatch(&gesture);
+}
+
+void EventGenerator::GestureTapAt(const gfx::Point& location) {
+  const int kTouchId = 2;
+  ui::TouchEvent press(ui::ET_TOUCH_PRESSED,
+                       location,
+                       kTouchId,
+                       Now());
+  Dispatch(&press);
+
+  ui::TouchEvent release(
+      ui::ET_TOUCH_RELEASED, location, kTouchId,
+      press.time_stamp() + base::TimeDelta::FromMilliseconds(50));
+  Dispatch(&release);
+}
+
+void EventGenerator::GestureTapDownAndUp(const gfx::Point& location) {
+  const int kTouchId = 3;
+  ui::TouchEvent press(ui::ET_TOUCH_PRESSED,
+                       location,
+                       kTouchId,
+                       Now());
+  Dispatch(&press);
+
+  ui::TouchEvent release(
+      ui::ET_TOUCH_RELEASED, location, kTouchId,
+      press.time_stamp() + base::TimeDelta::FromMilliseconds(1000));
+  Dispatch(&release);
+}
+
+base::TimeDelta EventGenerator::CalculateScrollDurationForFlingVelocity(
+    const gfx::Point& start,
+    const gfx::Point& end,
+    float velocity,
+    int steps) {
+  const float kGestureDistance = (start - end).Length();
+  const float kFlingStepDelay = (kGestureDistance / velocity) / steps * 1000000;
+  return base::TimeDelta::FromMicroseconds(kFlingStepDelay);
+}
+
+void EventGenerator::GestureScrollSequence(const gfx::Point& start,
+                                           const gfx::Point& end,
+                                           const base::TimeDelta& step_delay,
+                                           int steps) {
+  GestureScrollSequenceWithCallback(start, end, step_delay, steps,
+                                    base::Bind(&DummyCallback));
+}
+
+void EventGenerator::GestureScrollSequenceWithCallback(
+    const gfx::Point& start,
+    const gfx::Point& end,
+    const base::TimeDelta& step_delay,
+    int steps,
+    const ScrollStepCallback& callback) {
+  const int kTouchId = 5;
+  base::TimeDelta timestamp = Now();
+  ui::TouchEvent press(ui::ET_TOUCH_PRESSED, start, kTouchId, timestamp);
+  Dispatch(&press);
+
+  callback.Run(ui::ET_GESTURE_SCROLL_BEGIN, gfx::Vector2dF());
+
+  float dx = static_cast<float>(end.x() - start.x()) / steps;
+  float dy = static_cast<float>(end.y() - start.y()) / steps;
+  gfx::PointF location = start;
+  for (int i = 0; i < steps; ++i) {
+    location.Offset(dx, dy);
+    timestamp += step_delay;
+    ui::TouchEvent move(ui::ET_TOUCH_MOVED, location, kTouchId, timestamp);
+    Dispatch(&move);
+    callback.Run(ui::ET_GESTURE_SCROLL_UPDATE, gfx::Vector2dF(dx, dy));
+  }
+
+  ui::TouchEvent release(ui::ET_TOUCH_RELEASED, end, kTouchId, timestamp);
+  Dispatch(&release);
+
+  callback.Run(ui::ET_GESTURE_SCROLL_END, gfx::Vector2dF());
+}
+
+void EventGenerator::GestureMultiFingerScroll(int count,
+                                              const gfx::Point start[],
+                                              int event_separation_time_ms,
+                                              int steps,
+                                              int move_x,
+                                              int move_y) {
+  const int kMaxTouchPoints = 10;
+  int delays[kMaxTouchPoints] = { 0 };
+  GestureMultiFingerScrollWithDelays(
+      count, start, delays, event_separation_time_ms, steps, move_x, move_y);
+}
+
+void EventGenerator::GestureMultiFingerScrollWithDelays(
+    int count,
+    const gfx::Point start[],
+    const int delay_adding_finger_ms[],
+    int event_separation_time_ms,
+    int steps,
+    int move_x,
+    int move_y) {
+  const int kMaxTouchPoints = 10;
+  gfx::Point points[kMaxTouchPoints];
+  CHECK_LE(count, kMaxTouchPoints);
+  CHECK_GT(steps, 0);
+
+  int delta_x = move_x / steps;
+  int delta_y = move_y / steps;
+
+  for (int i = 0; i < count; ++i) {
+    points[i] = start[i];
+  }
+
+  base::TimeDelta press_time_first = Now();
+  base::TimeDelta press_time[kMaxTouchPoints];
+  bool pressed[kMaxTouchPoints];
+  for (int i = 0; i < count; ++i) {
+    pressed[i] = false;
+    press_time[i] = press_time_first +
+        base::TimeDelta::FromMilliseconds(delay_adding_finger_ms[i]);
+  }
+
+  int last_id = 0;
+  for (int step = 0; step < steps; ++step) {
+    base::TimeDelta move_time = press_time_first +
+        base::TimeDelta::FromMilliseconds(event_separation_time_ms * step);
+
+    while (last_id < count &&
+           !pressed[last_id] &&
+           move_time >= press_time[last_id]) {
+      ui::TouchEvent press(ui::ET_TOUCH_PRESSED,
+                           points[last_id],
+                           last_id,
+                           press_time[last_id]);
+      Dispatch(&press);
+      pressed[last_id] = true;
+      last_id++;
+    }
+
+    for (int i = 0; i < count; ++i) {
+      points[i].Offset(delta_x, delta_y);
+      if (i >= last_id)
+        continue;
+      ui::TouchEvent move(ui::ET_TOUCH_MOVED, points[i], i, move_time);
+      Dispatch(&move);
+    }
+  }
+
+  base::TimeDelta release_time = press_time_first +
+      base::TimeDelta::FromMilliseconds(event_separation_time_ms * steps);
+  for (int i = 0; i < last_id; ++i) {
+    ui::TouchEvent release(
+        ui::ET_TOUCH_RELEASED, points[i], i, release_time);
+    Dispatch(&release);
+  }
+}
+
+void EventGenerator::ScrollSequence(const gfx::Point& start,
+                                    const base::TimeDelta& step_delay,
+                                    float x_offset,
+                                    float y_offset,
+                                    int steps,
+                                    int num_fingers) {
+  base::TimeDelta timestamp = Now();
+  ui::ScrollEvent fling_cancel(ui::ET_SCROLL_FLING_CANCEL,
+                               start,
+                               timestamp,
+                               0,
+                               0, 0,
+                               0, 0,
+                               num_fingers);
+  Dispatch(&fling_cancel);
+
+  float dx = x_offset / steps;
+  float dy = y_offset / steps;
+  for (int i = 0; i < steps; ++i) {
+    timestamp += step_delay;
+    ui::ScrollEvent move(ui::ET_SCROLL,
+                         start,
+                         timestamp,
+                         0,
+                         dx, dy,
+                         dx, dy,
+                         num_fingers);
+    Dispatch(&move);
+  }
+
+  ui::ScrollEvent fling_start(ui::ET_SCROLL_FLING_START,
+                              start,
+                              timestamp,
+                              0,
+                              x_offset, y_offset,
+                              x_offset, y_offset,
+                              num_fingers);
+  Dispatch(&fling_start);
+}
+
+void EventGenerator::ScrollSequence(const gfx::Point& start,
+                                    const base::TimeDelta& step_delay,
+                                    const std::vector<gfx::PointF>& offsets,
+                                    int num_fingers) {
+  size_t steps = offsets.size();
+  base::TimeDelta timestamp = Now();
+  ui::ScrollEvent fling_cancel(ui::ET_SCROLL_FLING_CANCEL,
+                               start,
+                               timestamp,
+                               0,
+                               0, 0,
+                               0, 0,
+                               num_fingers);
+  Dispatch(&fling_cancel);
+
+  for (size_t i = 0; i < steps; ++i) {
+    timestamp += step_delay;
+    ui::ScrollEvent scroll(ui::ET_SCROLL,
+                           start,
+                           timestamp,
+                           0,
+                           offsets[i].x(), offsets[i].y(),
+                           offsets[i].x(), offsets[i].y(),
+                           num_fingers);
+    Dispatch(&scroll);
+  }
+
+  ui::ScrollEvent fling_start(ui::ET_SCROLL_FLING_START,
+                              start,
+                              timestamp,
+                              0,
+                              offsets[steps - 1].x(), offsets[steps - 1].y(),
+                              offsets[steps - 1].x(), offsets[steps - 1].y(),
+                              num_fingers);
+  Dispatch(&fling_start);
+}
+
+void EventGenerator::PressKey(ui::KeyboardCode key_code, int flags) {
+  DispatchKeyEvent(true, key_code, flags);
+}
+
+void EventGenerator::ReleaseKey(ui::KeyboardCode key_code, int flags) {
+  DispatchKeyEvent(false, key_code, flags);
+}
+
+void EventGenerator::Dispatch(ui::Event* event) {
+  DoDispatchEvent(event, async_);
+}
+
+void EventGenerator::SetTickClock(scoped_ptr<base::TickClock> tick_clock) {
+  tick_clock_ = tick_clock.Pass();
+}
+
+base::TimeDelta EventGenerator::Now() {
+  // This is the same as what EventTimeForNow() does, but here we do it
+  // with a tick clock that can be replaced with a simulated clock for tests.
+  return base::TimeDelta::FromInternalValue(
+      tick_clock_->NowTicks().ToInternalValue());
+}
+
+void EventGenerator::Init(gfx::NativeWindow root_window,
+                          gfx::NativeWindow window_context) {
+  delegate()->SetContext(this, root_window, window_context);
+  if (window_context)
+    current_location_ = delegate()->CenterOfWindow(window_context);
+  current_target_ = delegate()->GetTargetAt(current_location_);
+}
+
+void EventGenerator::DispatchKeyEvent(bool is_press,
+                                      ui::KeyboardCode key_code,
+                                      int flags) {
+#if defined(OS_WIN)
+  UINT key_press = WM_KEYDOWN;
+  uint16 character = ui::GetCharacterFromKeyCode(key_code, flags);
+  if (is_press && character) {
+    MSG native_event = { NULL, WM_KEYDOWN, key_code, 0 };
+    TestKeyEvent keyev(native_event, flags);
+    Dispatch(&keyev);
+    // On Windows, WM_KEYDOWN event is followed by WM_CHAR with a character
+    // if the key event cooresponds to a real character.
+    key_press = WM_CHAR;
+    key_code = static_cast<ui::KeyboardCode>(character);
+  }
+  MSG native_event =
+      { NULL, (is_press ? key_press : WM_KEYUP), key_code, 0 };
+  native_event.time = Now().InMicroseconds();
+  TestKeyEvent keyev(native_event, flags);
+#elif defined(USE_X11)
+  ui::ScopedXI2Event xevent;
+  xevent.InitKeyEvent(is_press ? ui::ET_KEY_PRESSED : ui::ET_KEY_RELEASED,
+                      key_code,
+                      flags);
+  static_cast<XEvent*>(xevent)->xkey.time = Now().InMicroseconds();
+  ui::KeyEvent keyev(xevent);
+#else
+  ui::EventType type = is_press ? ui::ET_KEY_PRESSED : ui::ET_KEY_RELEASED;
+  ui::KeyEvent keyev(type, key_code, flags);
+#endif  // OS_WIN
+  Dispatch(&keyev);
+}
+
+void EventGenerator::UpdateCurrentDispatcher(const gfx::Point& point) {
+  current_target_ = delegate()->GetTargetAt(point);
+}
+
+void EventGenerator::PressButton(int flag) {
+  if (!(flags_ & flag)) {
+    flags_ |= flag;
+    grab_ = (flags_ & kAllButtonMask) != 0;
+    gfx::Point location = GetLocationInCurrentRoot();
+    ui::MouseEvent mouseev(ui::ET_MOUSE_PRESSED, location, location,
+                           ui::EventTimeForNow(), flags_, flag);
+    Dispatch(&mouseev);
+  }
+}
+
+void EventGenerator::ReleaseButton(int flag) {
+  if (flags_ & flag) {
+    gfx::Point location = GetLocationInCurrentRoot();
+    ui::MouseEvent mouseev(ui::ET_MOUSE_RELEASED, location, location,
+                           ui::EventTimeForNow(), flags_, flag);
+    Dispatch(&mouseev);
+    flags_ ^= flag;
+  }
+  grab_ = (flags_ & kAllButtonMask) != 0;
+}
+
+gfx::Point EventGenerator::GetLocationInCurrentRoot() const {
+  gfx::Point p(current_location_);
+  delegate()->ConvertPointToTarget(current_target_, &p);
+  return p;
+}
+
+gfx::Point EventGenerator::CenterOfWindow(const EventTarget* window) const {
+  return delegate()->CenterOfTarget(window);
+}
+
+void EventGenerator::DoDispatchEvent(ui::Event* event, bool async) {
+  if (async) {
+    ui::Event* pending_event;
+    if (event->IsKeyEvent()) {
+      pending_event = new ui::KeyEvent(*static_cast<ui::KeyEvent*>(event));
+    } else if (event->IsMouseEvent()) {
+      pending_event = new ui::MouseEvent(*static_cast<ui::MouseEvent*>(event));
+    } else if (event->IsTouchEvent()) {
+      pending_event = new ui::TouchEvent(*static_cast<ui::TouchEvent*>(event));
+    } else if (event->IsScrollEvent()) {
+      pending_event =
+          new ui::ScrollEvent(*static_cast<ui::ScrollEvent*>(event));
+    } else {
+      NOTREACHED() << "Invalid event type";
+      return;
+    }
+    if (pending_events_.empty()) {
+      base::ThreadTaskRunnerHandle::Get()->PostTask(
+          FROM_HERE,
+          base::Bind(&EventGenerator::DispatchNextPendingEvent,
+                     base::Unretained(this)));
+    }
+    pending_events_.push_back(pending_event);
+  } else {
+    ui::EventSource* event_source = delegate()->GetEventSource(current_target_);
+    ui::EventSourceTestApi event_source_test(event_source);
+    ui::EventDispatchDetails details =
+        event_source_test.SendEventToProcessor(event);
+    CHECK(!details.dispatcher_destroyed);
+  }
+}
+
+void EventGenerator::DispatchNextPendingEvent() {
+  DCHECK(!pending_events_.empty());
+  ui::Event* event = pending_events_.front();
+  DoDispatchEvent(event, false);
+  pending_events_.pop_front();
+  delete event;
+  if (!pending_events_.empty()) {
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE,
+        base::Bind(&EventGenerator::DispatchNextPendingEvent,
+                   base::Unretained(this)));
+  }
+}
+
+const EventGeneratorDelegate* EventGenerator::delegate() const {
+  if (delegate_)
+    return delegate_.get();
+
+  DCHECK(default_delegate);
+  return default_delegate;
+}
+
+EventGeneratorDelegate* EventGenerator::delegate() {
+  return const_cast<EventGeneratorDelegate*>(
+      const_cast<const EventGenerator*>(this)->delegate());
+}
+
+}  // namespace test
+}  // namespace ui