Prepare SyntheticPointerAction to handle touch actions for multiple fingers

content/browser/renderer_host/input/synthetic_pointer_action_unittest.cc

+// 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 {
+
+class MockSyntheticGestureTarget : public SyntheticGestureTarget {
+ public:
+  MockSyntheticGestureTarget() {}
+  ~MockSyntheticGestureTarget() override {}
+
+  // SyntheticGestureTarget:
+  void DispatchInputEventToPlatform(const WebInputEvent& event) override {}
+
+  SyntheticGestureParams::GestureSourceType
+  GetDefaultSyntheticGestureSourceType() const override {
+    return SyntheticGestureParams::TOUCH_INPUT;
+  }
+
+  void SetNeedsFlush() override { NOTIMPLEMENTED(); }
+
+  base::TimeDelta PointerAssumedStoppedTime() const override {
+    NOTIMPLEMENTED();
+    return base::TimeDelta();
+  }
+
+  float GetTouchSlopInDips() const override {
+    NOTIMPLEMENTED();
+    return 0.0f;
+  }
+
+  float GetMinScalingSpanInDips() const override {
+    NOTIMPLEMENTED();
+    return 0.0f;
+  }
+
+  virtual SyntheticGestureParams::GestureSourceType PointerSourceType()
+      const = 0;
+};
+
+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_;

[tdresser, 2016/06/09 16:50:22]

This has touch specific information in it, but then also has a touch specific
subclass.

Why isn't this a single class?

[lanwei, 2016/06/09 18:10:14]

Sorry, I moved this into the MockSyntheticPointerTouchActionTarget, the reason I
have a separate function for touch is I will have another one for mouse.

+  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;
+  }
+
+  SyntheticGestureParams::GestureSourceType PointerSourceType() const override {
+    return SyntheticGestureParams::TOUCH_INPUT;
+  }
+};
+
+class SyntheticPointerActionTest : public testing::Test {
+ public:
+  SyntheticPointerActionTest() {}
+  ~SyntheticPointerActionTest() override {}
+
+ protected:
+  template <typename MockGestureTarget>
+  void CreateControllerAndTarget() {
+    target_.reset(new MockGestureTarget());
+    synthetic_pointer_ = SyntheticPointer::Create(target_->PointerSourceType());
+  }
+
+  void SetUp() override {
+    num_success_ = 0;
+    num_failure_ = 0;
+    action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+    std::fill(index_map_.begin(), index_map_.end(), -1);
+  }
+
+  void TearDown() override {
+    target_.reset();
+    pointer_action_.reset();
+    synthetic_pointer_.reset();
+    action_param_list_.reset();
+  }
+
+  void ForwardSyntheticPointerAction() {
+    pointer_action_.reset(new SyntheticPointerAction(
+        std::move(action_param_list_), synthetic_pointer_.get(), &index_map_));
+
+    SyntheticGesture::Result result = pointer_action_->ForwardInputEvents(
+        base::TimeTicks::Now(), target_.get());
+
+    if (result == SyntheticGesture::GESTURE_FINISHED)
+      num_success_++;
+    else
+      num_failure_++;
+  }
+
+  int num_success_;
+  int num_failure_;
+  std::unique_ptr<MockSyntheticGestureTarget> target_;
+  std::unique_ptr<SyntheticGesture> pointer_action_;
+  std::unique_ptr<SyntheticPointer> synthetic_pointer_;
+  std::unique_ptr<std::vector<SyntheticPointerActionParams>> action_param_list_;
+  SyntheticPointerAction::IndexMap index_map_;
+};
+
+TEST_F(SyntheticPointerActionTest, PointerTouchAction) {
+  CreateControllerAndTarget<MockSyntheticPointerTouchActionTarget>();
+
+  // Send a touch press for one finger.
+  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);
+  ForwardSyntheticPointerAction();
+
+  MockSyntheticPointerTouchActionTarget* pointer_touch_target =
+      static_cast<MockSyntheticPointerTouchActionTarget*>(target_.get());
+  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);
+  ForwardSyntheticPointerAction();
+
+  pointer_touch_target =
+      static_cast<MockSyntheticPointerTouchActionTarget*>(target_.get());
+  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);
+  ForwardSyntheticPointerAction();
+
+  pointer_touch_target =
+      static_cast<MockSyntheticPointerTouchActionTarget*>(target_.get());
+  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];
+  ForwardSyntheticPointerAction();
+
+  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(SyntheticPointerActionTest, PointerTouchActionInvalid) {
+  CreateControllerAndTarget<MockSyntheticPointerTouchActionTarget>();
+
+  // Users sent a wrong index for the touch action.
+  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);
+  ForwardSyntheticPointerAction();
+
+  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);
+  ForwardSyntheticPointerAction();
+
+  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);
+  ForwardSyntheticPointerAction();
+
+  EXPECT_EQ(0, num_success_);
+  EXPECT_EQ(3, num_failure_);
+
+  action_param_list_.reset(new std::vector<SyntheticPointerActionParams>());
+  params0.gesture_source_type = SyntheticGestureParams::TOUCH_INPUT;
+  params0.set_index(1);
+  params0.set_pointer_action_type(
+      SyntheticPointerActionParams::PointerActionType::RELEASE);
+  action_param_list_->push_back(params0);
+  ForwardSyntheticPointerAction();
+
+  EXPECT_EQ(0, num_success_);
+  EXPECT_EQ(4, 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);
+  ForwardSyntheticPointerAction();
+
+  EXPECT_EQ(1, num_success_);
+  EXPECT_EQ(4, 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);
+  ForwardSyntheticPointerAction();
+
+  EXPECT_EQ(1, num_success_);
+  EXPECT_EQ(5, num_failure_);
+}
+
+}  // namespace
+
+}  // namespace content