Pass through tilt_x and tilt_y to blink

ui/events/android/motion_event_android_unittest.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 <android/input.h>
 #include <stddef.h>
+#include <cmath>
 
 #include "base/android/jni_android.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/events/android/motion_event_android.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/test/motion_event_test_utils.h"
 
 namespace ui {
 class MotionEvent;
 
 namespace {
 const float kPixToDip = 0.5f;
 
 int kAndroidActionButton = 0;
 int kAndroidActionDown = AMOTION_EVENT_ACTION_DOWN;
 int kAndroidActionPointerDown = AMOTION_EVENT_ACTION_POINTER_DOWN;
 int kAndroidAltKeyDown = AMETA_ALT_ON;
 
 // Corresponds to TOOL_TYPE_FINGER, see
 // developer.android.com/reference/android/view/MotionEvent.html
 //     #TOOL_TYPE_FINGER.
 int kAndroidToolTypeFinger = 1;
 
 // Corresponds to BUTTON_PRIMARY, see
 // developer.android.com/reference/android/view/MotionEvent.html#BUTTON_PRIMARY.
 int kAndroidButtonPrimary = 1;
 
+// This function convert tilt_x and tilt_y back to tilt_rad.
+float ConvertToTiltRad(float tilt_x, float tilt_y) {
+  float tilt_x_r = sin(tilt_x * M_PI / 180.f);
+  float tilt_x_z = cos(tilt_x * M_PI / 180.f);
+  float tilt_y_r = sin(tilt_y * M_PI / 180.f);
+  float tilt_y_z = cos(tilt_y * M_PI / 180.f);
+  float r_x = tilt_x_r * tilt_y_z;
+  float r_y = tilt_y_r * tilt_x_z;
+  float r = sqrt(r_x * r_x + r_y * r_y);
+  float z = tilt_x_z * tilt_y_z;
+  return atan2(r, z);
+}
 }  // namespace
 
+constexpr float float_error = 0.0001f;
 // Note that these tests avoid creating a Java instance of the MotionEvent, as
 // we're primarily testing caching behavior, and the code necessary to
 // construct a Java-backed MotionEvent itself adds unnecessary complexity.
 TEST(MotionEventAndroidTest, Constructor) {
   int event_time_ms = 5;
   base::TimeTicks event_time =
       base::TimeTicks() + base::TimeDelta::FromMilliseconds(event_time_ms);
   MotionEventAndroid::Pointer p0(
       1, 13.7f, -7.13f, 5.3f, 1.2f, 0.1f, 0.2f, kAndroidToolTypeFinger);
-  MotionEventAndroid::Pointer p1(
-      2, -13.7f, 7.13f, 3.5f, 12.1f, -0.1f, -0.4f, kAndroidToolTypeFinger);
+  MotionEventAndroid::Pointer p1(2, -13.7f, 7.13f, 3.5f, 12.1f, -0.1f, 0.4f,
+                                 kAndroidToolTypeFinger);
   float raw_offset = -3.f;
   int pointer_count = 2;
   int history_size = 0;
   int action_index = -1;
   MotionEventAndroid event(
       base::android::AttachCurrentThread(), nullptr, kPixToDip, 0.f, 0.f, 0.f,
       event_time_ms, kAndroidActionDown, pointer_count, history_size,
       action_index, kAndroidActionButton, kAndroidButtonPrimary,
       kAndroidAltKeyDown, raw_offset, -raw_offset, &p0, &p1);
 
   EXPECT_EQ(MotionEvent::ACTION_DOWN, event.GetAction());
   EXPECT_EQ(event_time, event.GetEventTime());
   EXPECT_EQ(p0.pos_x_pixels * kPixToDip, event.GetX(0));
   EXPECT_EQ(p0.pos_y_pixels * kPixToDip, event.GetY(0));
   EXPECT_EQ(p1.pos_x_pixels * kPixToDip, event.GetX(1));
   EXPECT_EQ(p1.pos_y_pixels * kPixToDip, event.GetY(1));
   EXPECT_FLOAT_EQ((p0.pos_x_pixels + raw_offset) * kPixToDip, event.GetRawX(0));
   EXPECT_FLOAT_EQ((p0.pos_y_pixels - raw_offset) * kPixToDip, event.GetRawY(0));
   EXPECT_FLOAT_EQ((p1.pos_x_pixels + raw_offset) * kPixToDip, event.GetRawX(1));
   EXPECT_FLOAT_EQ((p1.pos_y_pixels - raw_offset) * kPixToDip, event.GetRawY(1));
   EXPECT_EQ(p0.touch_major_pixels * kPixToDip, event.GetTouchMajor(0));
   EXPECT_EQ(p1.touch_major_pixels * kPixToDip, event.GetTouchMajor(1));
   EXPECT_EQ(p0.touch_minor_pixels * kPixToDip, event.GetTouchMinor(0));
   EXPECT_EQ(p1.touch_minor_pixels * kPixToDip, event.GetTouchMinor(1));
   EXPECT_EQ(p0.orientation_rad, event.GetOrientation(0));
   EXPECT_EQ(p1.orientation_rad, event.GetOrientation(1));
-  EXPECT_EQ(p0.tilt_rad, event.GetTilt(0));
-  EXPECT_EQ(p1.tilt_rad, event.GetTilt(1));
+  EXPECT_NEAR(p0.tilt_rad,
+              ConvertToTiltRad(event.GetTiltX(0), event.GetTiltY(0)),
+              float_error);
+  EXPECT_NEAR(p1.tilt_rad,
+              ConvertToTiltRad(event.GetTiltX(1), event.GetTiltY(1)),
+              float_error);
   EXPECT_EQ(p0.id, event.GetPointerId(0));
   EXPECT_EQ(p1.id, event.GetPointerId(1));
   EXPECT_EQ(MotionEvent::TOOL_TYPE_FINGER, event.GetToolType(0));
   EXPECT_EQ(MotionEvent::TOOL_TYPE_FINGER, event.GetToolType(1));
   EXPECT_EQ(MotionEvent::BUTTON_PRIMARY, event.GetButtonState());
   EXPECT_EQ(ui::EF_ALT_DOWN | ui::EF_LEFT_MOUSE_BUTTON, event.GetFlags());
   EXPECT_EQ(static_cast<size_t>(pointer_count), event.GetPointerCount());
   EXPECT_EQ(static_cast<size_t>(history_size), event.GetHistorySize());
 }
 
@@ skipping 68 matching lines @@
   MotionEventAndroid event(base::android::AttachCurrentThread(), nullptr,
                            kPixToDip, 0, 0, 0, 0, kAndroidActionPointerDown,
                            pointer_count, history_size, action_index, 0, 0, 0,
                            0, 0, &p0, &p1);
 
   EXPECT_EQ(MotionEvent::ACTION_POINTER_DOWN, event.GetAction());
   EXPECT_EQ(action_index, event.GetActionIndex());
 }
 
 }  // namespace content