Prepare SyntheticPointerAction to handle touch actions for multiple fingers

content/browser/renderer_host/input/synthetic_pointer_action_controller_unittest.cc

Index: content/browser/renderer_host/input/synthetic_pointer_action_controller_unittest.cc
diff --git a/content/browser/renderer_host/input/synthetic_pointer_action_controller_unittest.cc b/content/browser/renderer_host/input/synthetic_pointer_action_controller_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..69523b189fa0ac15e13e4ee67c86000f74d0b543
--- /dev/null
+++ b/content/browser/renderer_host/input/synthetic_pointer_action_controller_unittest.cc
@@ -0,0 +1,362 @@
+// Copyright 2016 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 "base/bind.h"
+#include "base/time/time.h"
+#include "content/browser/renderer_host/input/synthetic_gesture.h"
+#include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
+#include "content/browser/renderer_host/input/synthetic_gesture_target.h"
+#include "content/browser/renderer_host/input/synthetic_pointer_action.h"
+#include "content/browser/renderer_host/input/synthetic_touch_pointer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
+#include "ui/gfx/geometry/point.h"
+#include "ui/gfx/geometry/point_f.h"
+
+using blink::WebInputEvent;
+using blink::WebTouchEvent;
+using blink::WebTouchPoint;
+
+namespace content {
+
+namespace {
+
+const int kFlushInputRateInMs = 16;
+
+class MockSyntheticGestureTarget : public SyntheticGestureTarget {
+ public:
+  MockSyntheticGestureTarget() : flush_requested_(false) {}
+  ~MockSyntheticGestureTarget() override {}
+
+  // SyntheticGestureTarget:
+  void DispatchInputEventToPlatform(const WebInputEvent& event) override {}
+
+  void SetNeedsFlush() override { flush_requested_ = true; }
+
+  SyntheticGestureParams::GestureSourceType
+  GetDefaultSyntheticGestureSourceType() const override {
+    return SyntheticGestureParams::TOUCH_INPUT;
+  }
+
+  base::TimeDelta PointerAssumedStoppedTime() const override {
+    NOTIMPLEMENTED();
+    return base::TimeDelta();
+  }
+
+  void set_pointer_assumed_stopped_time_ms(int time_ms) { NOTIMPLEMENTED(); }

[tdresser, 2016/06/06 18:36:08]

Why is this here? It isn't overriding anything...

[lanwei, 2016/06/08 14:48:37]

SyntheticGestureTarget class has these virtual methods.
If we inherit from SyntheticGestureTargetBase, we have other virtual methods to
implement. Is there a good way to do this with these virtual methods?

https://codesearch.chromium.org/chromium/src/content/browser/renderer_host/in...

[lanwei, 2016/06/09 14:37:03]

Done.

+
+  float GetTouchSlopInDips() const override {
+    NOTIMPLEMENTED();
+    return 0.0f;
+  }
+
+  float GetMinScalingSpanInDips() const override {
+    NOTIMPLEMENTED();
+    return 0.0f;
+  }
+
+  bool flush_requested() const { return flush_requested_; }
+  void ClearFlushRequest() { flush_requested_ = false; }
+
+ private:
+  bool flush_requested_;
+};
+
+class MockSyntheticPointerActionTarget : public MockSyntheticGestureTarget {
+ public:
+  MockSyntheticPointerActionTarget() {}
+  ~MockSyntheticPointerActionTarget() override {}
+
+  gfx::PointF positions(int index) const { return positions_[index]; }
+  int indexes(int index) const { return indexes_[index]; }
+  WebTouchPoint::State states(int index) { return states_[index]; }
+  unsigned touch_length() const { return touch_length_; }
+  WebInputEvent::Type type() const { return type_; }
+
+ protected:
+  gfx::PointF positions_[WebTouchEvent::touchesLengthCap];
+  unsigned touch_length_;
+  int indexes_[WebTouchEvent::touchesLengthCap];
+  WebTouchPoint::State states_[WebTouchEvent::touchesLengthCap];
+  WebInputEvent::Type type_;
+};
+
+class MockSyntheticPointerTouchActionTarget
+    : public MockSyntheticPointerActionTarget {
+ public:
+  MockSyntheticPointerTouchActionTarget() {}
+  ~MockSyntheticPointerTouchActionTarget() override {}
+
+  void DispatchInputEventToPlatform(const WebInputEvent& event) override {
+    ASSERT_TRUE(WebInputEvent::isTouchEventType(event.type));
+    const WebTouchEvent& touch_event = static_cast<const WebTouchEvent&>(event);
+    type_ = touch_event.type;
+    for (size_t i = 0; i < touch_event.touchesLength; ++i) {
+      indexes_[i] = touch_event.touches[i].id;
+      positions_[i] = gfx::PointF(touch_event.touches[i].position);
+      states_[i] = touch_event.touches[i].state;
+    }
+    touch_length_ = touch_event.touchesLength;
+  }
+};
+
+class SyntheticPointerActionControllerTest : public testing::Test {

[tdresser, 2016/06/06 18:36:08]

Shouldn't this just be SyntheticPointerActionTest? Why is "Controller" here (and
in the filename)?

[lanwei, 2016/06/09 14:37:03]

Done.

+ public:
+  SyntheticPointerActionControllerTest() {}
+  ~SyntheticPointerActionControllerTest() override {}
+
+ protected:
+  template <typename MockGestureTarget>
+  void CreateControllerAndTarget() {
+    target_ = new MockGestureTarget();
+    controller_.reset(new SyntheticGestureController(
+        std::unique_ptr<SyntheticGestureTarget>(target_)));
+  }
+
+  void SetUp() override {
+    num_success_ = 0;
+    num_failure_ = 0;
+    time_ = base::TimeTicks::Now();
+    action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+    std::fill(index_map_.begin(), index_map_.end(), -1);
+  }
+
+  void TearDown() override {
+    controller_.reset();
+    target_ = nullptr;
+    time_ = base::TimeTicks();
+    action_param_list_.reset();
+  }
+
+  void QueueSyntheticGesture(std::unique_ptr<SyntheticGesture> gesture) {
+    controller_->QueueSyntheticGesture(
+        std::move(gesture),
+        base::Bind(
+            &SyntheticPointerActionControllerTest::OnSyntheticGestureCompleted,
+            base::Unretained(this)));
+  }
+
+  void FlushInputUntilComplete() {
+    while (target_->flush_requested()) {
+      while (target_->flush_requested()) {
+        target_->ClearFlushRequest();
+        time_ += base::TimeDelta::FromMilliseconds(kFlushInputRateInMs);
+        controller_->Flush(time_);
+      }
+      controller_->OnDidFlushInput();
+    }
+  }
+
+  void OnSyntheticGestureCompleted(SyntheticGesture::Result result) {
+    if (result == SyntheticGesture::GESTURE_FINISHED)
+      num_success_++;
+    else
+      num_failure_++;
+  }
+
+  MockSyntheticGestureTarget* target_;
+  std::unique_ptr<SyntheticGestureController> controller_;
+  base::TimeTicks time_;
+  int num_success_;
+  int num_failure_;
+  std::unique_ptr<std::vector<SyntheticPointerActionParams>> action_param_list_;
+  SyntheticPointerAction::IndexMap index_map_;
+};
+
+TEST_F(SyntheticPointerActionControllerTest, PointerTouchAction) {
+  CreateControllerAndTarget<MockSyntheticPointerTouchActionTarget>();

[tdresser, 2016/06/06 18:36:08]

I was thinking we'd have some low level tests which only relied on the
SyntheticPointerAction, and not the controller, and then some separate tests
which required the controller.

[lanwei, 2016/06/08 14:48:37]

The test cases are very similar to SyntheticGestureControllerTest, do you think
we should add these to SyntheticGestureControllerTest as well?

[lanwei, 2016/06/09 14:37:03]

Done.

+
+  // Send a touch press for one finger.
+  std::unique_ptr<SyntheticPointer> synthetic_pointer =
+      SyntheticPointer::Create(SyntheticGestureParams::TOUCH_INPUT);
+  SyntheticPointerActionParams params0 = SyntheticPointerActionParams(
+      SyntheticPointerActionParams::PointerActionType::PRESS);
+  params0.gesture_source_type = SyntheticGestureParams::TOUCH_INPUT;
+  params0.set_index(0);
+  params0.set_position(gfx::PointF(54, 89));
+  action_param_list_->push_back(params0);
+
+  std::unique_ptr<SyntheticGesture> gesture(new SyntheticPointerAction(
+      std::move(action_param_list_), synthetic_pointer.get(), &index_map_));
+  QueueSyntheticGesture(std::move(gesture));
+  FlushInputUntilComplete();
+
+  MockSyntheticPointerTouchActionTarget* pointer_touch_target =
+      static_cast<MockSyntheticPointerTouchActionTarget*>(target_);
+  EXPECT_EQ(1, num_success_);
+  EXPECT_EQ(0, num_failure_);
+  EXPECT_EQ(pointer_touch_target->type(), WebInputEvent::TouchStart);
+  EXPECT_EQ(pointer_touch_target->indexes(0), index_map_[0]);
+  EXPECT_EQ(pointer_touch_target->positions(0), params0.position());
+  EXPECT_EQ(pointer_touch_target->states(0), WebTouchPoint::StatePressed);
+  ASSERT_EQ(pointer_touch_target->touch_length(), 1U);
+
+  // Send a touch move for the first finger and a touch press for the second
+  // finger.
+  action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+  params0.set_pointer_action_type(
+      SyntheticPointerActionParams::PointerActionType::MOVE);
+  params0.set_position(gfx::PointF(133, 156));
+  SyntheticPointerActionParams params1 = SyntheticPointerActionParams(
+      SyntheticPointerActionParams::PointerActionType::PRESS);
+  params1.gesture_source_type = SyntheticGestureParams::TOUCH_INPUT;
+  params1.set_index(1);
+  params1.set_position(gfx::PointF(79, 132));
+  action_param_list_->push_back(params0);
+  action_param_list_->push_back(params1);
+  gesture.reset(new SyntheticPointerAction(
+      std::move(action_param_list_), synthetic_pointer.get(), &index_map_));
+  QueueSyntheticGesture(std::move(gesture));
+  FlushInputUntilComplete();
+
+  pointer_touch_target =
+      static_cast<MockSyntheticPointerTouchActionTarget*>(target_);
+  EXPECT_EQ(2, num_success_);
+  EXPECT_EQ(0, num_failure_);
+  // The type of the SyntheticWebTouchEvent is the action of the last finger.
+  EXPECT_EQ(pointer_touch_target->type(), WebInputEvent::TouchStart);
+  EXPECT_EQ(pointer_touch_target->indexes(0), index_map_[0]);
+  EXPECT_EQ(pointer_touch_target->positions(0), params0.position());
+  EXPECT_EQ(pointer_touch_target->states(0), WebTouchPoint::StateMoved);
+  EXPECT_EQ(pointer_touch_target->indexes(1), index_map_[1]);
+  EXPECT_EQ(pointer_touch_target->positions(1), params1.position());
+  EXPECT_EQ(pointer_touch_target->states(1), WebTouchPoint::StatePressed);
+  ASSERT_EQ(pointer_touch_target->touch_length(), 2U);
+
+  // Send a touch move for the second finger.
+  action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+  params1.set_pointer_action_type(
+      SyntheticPointerActionParams::PointerActionType::MOVE);
+  params1.set_position(gfx::PointF(87, 253));
+  action_param_list_->push_back(params1);
+  gesture.reset(new SyntheticPointerAction(
+      std::move(action_param_list_), synthetic_pointer.get(), &index_map_));
+  QueueSyntheticGesture(std::move(gesture));
+  FlushInputUntilComplete();
+
+  pointer_touch_target =
+      static_cast<MockSyntheticPointerTouchActionTarget*>(target_);
+  EXPECT_EQ(3, num_success_);
+  EXPECT_EQ(0, num_failure_);
+  EXPECT_EQ(pointer_touch_target->type(), WebInputEvent::TouchMove);
+  EXPECT_EQ(pointer_touch_target->indexes(1), index_map_[1]);
+  EXPECT_EQ(pointer_touch_target->positions(1), params1.position());
+  EXPECT_EQ(pointer_touch_target->states(1), WebTouchPoint::StateMoved);
+  ASSERT_EQ(pointer_touch_target->touch_length(), 2U);
+
+  // Send touch releases for both fingers.
+  action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+  params0.set_pointer_action_type(
+      SyntheticPointerActionParams::PointerActionType::RELEASE);
+  params1.set_pointer_action_type(
+      SyntheticPointerActionParams::PointerActionType::RELEASE);
+  action_param_list_->push_back(params0);
+  action_param_list_->push_back(params1);
+  int index0 = index_map_[0];
+  int index1 = index_map_[1];
+  gesture.reset(new SyntheticPointerAction(
+      std::move(action_param_list_), synthetic_pointer.get(), &index_map_));
+  QueueSyntheticGesture(std::move(gesture));
+  FlushInputUntilComplete();
+
+  EXPECT_EQ(4, num_success_);
+  EXPECT_EQ(0, num_failure_);
+  EXPECT_EQ(pointer_touch_target->type(), WebInputEvent::TouchEnd);
+  EXPECT_EQ(pointer_touch_target->indexes(0), index0);
+  EXPECT_EQ(-1, index_map_[0]);
+  EXPECT_EQ(pointer_touch_target->states(0), WebTouchPoint::StateReleased);
+  EXPECT_EQ(pointer_touch_target->indexes(1), index1);
+  EXPECT_EQ(-1, index_map_[1]);
+  EXPECT_EQ(pointer_touch_target->states(1), WebTouchPoint::StateReleased);
+  ASSERT_EQ(pointer_touch_target->touch_length(), 2U);
+}
+
+TEST_F(SyntheticPointerActionControllerTest, PointerTouchActionInvalid) {
+  CreateControllerAndTarget<MockSyntheticPointerTouchActionTarget>();
+
+  // Users sent a wrong index for the touch action.
+  std::unique_ptr<SyntheticPointer> synthetic_pointer =
+      SyntheticPointer::Create(SyntheticGestureParams::TOUCH_INPUT);
+  SyntheticPointerActionParams params0 = SyntheticPointerActionParams(
+      SyntheticPointerActionParams::PointerActionType::PRESS);
+  params0.gesture_source_type = SyntheticGestureParams::TOUCH_INPUT;
+  params0.set_index(-1);
+  params0.set_position(gfx::PointF(54, 89));
+  action_param_list_->push_back(params0);
+
+  std::unique_ptr<SyntheticGesture> gesture(new SyntheticPointerAction(
+      std::move(action_param_list_), synthetic_pointer.get(), &index_map_));
+  QueueSyntheticGesture(std::move(gesture));
+  FlushInputUntilComplete();
+
+  EXPECT_EQ(0, num_success_);
+  EXPECT_EQ(1, num_failure_);
+
+  // Users' gesture source type does not match with the touch action.
+  action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+  params0.gesture_source_type = SyntheticGestureParams::MOUSE_INPUT;
+  params0.set_index(0);
+  action_param_list_->push_back(params0);
+
+  gesture.reset(new SyntheticPointerAction(
+      std::move(action_param_list_), synthetic_pointer.get(), &index_map_));
+  QueueSyntheticGesture(std::move(gesture));
+  FlushInputUntilComplete();
+
+  EXPECT_EQ(0, num_success_);
+  EXPECT_EQ(2, num_failure_);
+
+  // Cannot send a touch move or touch release without sending a touch press
+  // first.
+  action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+  params0.gesture_source_type = SyntheticGestureParams::TOUCH_INPUT;
+  params0.set_index(0);
+  params0.set_pointer_action_type(
+      SyntheticPointerActionParams::PointerActionType::MOVE);
+  action_param_list_->push_back(params0);
+
+  gesture.reset(new SyntheticPointerAction(
+      std::move(action_param_list_), synthetic_pointer.get(), &index_map_));
+  QueueSyntheticGesture(std::move(gesture));
+  FlushInputUntilComplete();
+
+  EXPECT_EQ(0, num_success_);
+  EXPECT_EQ(3, num_failure_);
+
+  // Send a touch press for one finger.
+  action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+  params0.gesture_source_type = SyntheticGestureParams::TOUCH_INPUT;
+  params0.set_index(0);
+  params0.set_pointer_action_type(
+      SyntheticPointerActionParams::PointerActionType::PRESS);
+  action_param_list_->push_back(params0);
+
+  gesture.reset(new SyntheticPointerAction(
+      std::move(action_param_list_), synthetic_pointer.get(), &index_map_));
+  QueueSyntheticGesture(std::move(gesture));
+  FlushInputUntilComplete();
+
+  EXPECT_EQ(1, num_success_);
+  EXPECT_EQ(3, num_failure_);
+
+  // Cannot send a touch press again without releasing the finger.
+  action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+  params0.gesture_source_type = SyntheticGestureParams::TOUCH_INPUT;
+  params0.set_index(0);
+  params0.set_pointer_action_type(
+      SyntheticPointerActionParams::PointerActionType::PRESS);
+  action_param_list_->push_back(params0);
+
+  gesture.reset(new SyntheticPointerAction(
+      std::move(action_param_list_), synthetic_pointer.get(), &index_map_));
+  QueueSyntheticGesture(std::move(gesture));
+  FlushInputUntilComplete();
+
+  EXPECT_EQ(1, num_success_);
+  EXPECT_EQ(4, num_failure_);
+}
+
+}  // namespace
+
+}  // namespace content