Move touch CTM from X into Chrome

ash/touch/touch_transformer_controller_unittest.cc

Index: ash/touch/touch_transformer_controller_unittest.cc
diff --git a/ash/touch/touch_transformer_controller_unittest.cc b/ash/touch/touch_transformer_controller_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bae235477e99104fe505532d66caeefc3a065fa6
--- /dev/null
+++ b/ash/touch/touch_transformer_controller_unittest.cc
@@ -0,0 +1,200 @@
+// Copyright (c) 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 "ash/touch/touch_transformer_controller.h"
+
+#include "ash/shell.h"
+#include "ash/test/ash_test_base.h"
+#include "ui/aura/window_tree_host.h"
+#include "ui/events/x/device_data_manager.h"
+#include "ui/gfx/display.h"
+
+namespace ash {
+
+namespace {
+DisplayInfo CreateDisplayInfo(int64 id,
+                              int touch_device_id,
+                              const gfx::Rect& bounds) {
+  DisplayInfo info(id, "", false);
+  info.SetBounds(bounds);
+  info.set_touch_device_id(touch_device_id);
+  return info;
+}
+}  //  namespace
+
+typedef test::AshTestBase TouchTransformerControllerTest;
+
+TEST_F(TouchTransformerControllerTest, TouchTransformerMirrorModeLetterboxing) {
+  // The internal display has native resolution of 2560x1700, and in
+  // mirror mode it is configured as 1920x1200. This is in letterboxing
+  // mode.
+  DisplayInfo internal_display_info =
+      CreateDisplayInfo(1, 10, gfx::Rect(0, 0, 1920, 1200));
+  std::vector<DisplayMode> internal_modes;
+  internal_modes.push_back(
+      DisplayMode(gfx::Size(2560, 1700), 60, false, true));
+  internal_modes.push_back(
+      DisplayMode(gfx::Size(1920, 1200), 60, false, false));
+  internal_display_info.set_display_modes(internal_modes);
+
+  DisplayInfo external_display_info =
+      CreateDisplayInfo(2, 11, gfx::Rect(0, 0, 1920, 1200));
+
+  TouchTransformerController* tt_controller =
+      Shell::GetInstance()->touch_transformer_controller();
+  ui::DeviceDataManager* device_manager = ui::DeviceDataManager::GetInstance();
+
+  tt_controller->force_compute_mirror_mode_touch_transformer_ = true;
+  device_manager->UpdateTouchInfoForDisplay(
+      internal_display_info,
+      tt_controller->GetMirrorModeTouchTransformer(internal_display_info));
+
+  tt_controller->force_compute_mirror_mode_touch_transformer_ = false;
+  device_manager->UpdateTouchInfoForDisplay(
+      external_display_info,
+      tt_controller->GetMirrorModeTouchTransformer(external_display_info));
+
+  EXPECT_EQ(1, device_manager->GetDisplayForTouchDevice(10));
+  EXPECT_EQ(2, device_manager->GetDisplayForTouchDevice(11));
+
+  // External touch display has the default TouchTransformer.
+  float x = 100.0;
+  float y = 100.0;
+  device_manager->ApplyTouchTransformer(11, &x, &y);
+  EXPECT_EQ(100, x);
+  EXPECT_EQ(100, y);
+
+  // In letterboxing, there is (1-2560*(1200/1920)/1700)/2 = 2.95% of the
+  // height on both the top & bottom region of the screen is blank.
+  // When touch events coming at Y range [0, 1200), the mapping should be
+  // [0, ~35] ---> < 0
+  // [~35, ~1165] ---> [0, 1200)
+  // [~1165, 1200] ---> >= 1200
+  x = 100.0;
+  y = 35.0;
+  device_manager->ApplyTouchTransformer(10, &x, &y);
+  EXPECT_EQ(100, static_cast<int>(x));
+  EXPECT_EQ(0, static_cast<int>(y));
+
+  x = 100.0;
+  y = 1165.0;
+  device_manager->ApplyTouchTransformer(10, &x, &y);
+  EXPECT_EQ(100, static_cast<int>(x));
+  EXPECT_EQ(1200, static_cast<int>(y));
+}
+
+TEST_F(TouchTransformerControllerTest, TouchTransformerMirrorModePillarboxing) {
+  // The internal display has native resolution of 1366x768, and in
+  // mirror mode it is configured as 1024x768. This is in pillarboxing
+  // mode.
+  DisplayInfo internal_display_info =
+      CreateDisplayInfo(1, 10, gfx::Rect(0, 0, 1024, 768));
+  std::vector<DisplayMode> internal_modes;
+  internal_modes.push_back(
+      DisplayMode(gfx::Size(1366, 768), 60, false, true));
+  internal_modes.push_back(
+      DisplayMode(gfx::Size(1024, 768), 60, false, false));
+  internal_display_info.set_display_modes(internal_modes);
+
+  DisplayInfo external_display_info =
+      CreateDisplayInfo(2, 11, gfx::Rect(0, 0, 1024, 768));
+
+  TouchTransformerController* tt_controller =
+      Shell::GetInstance()->touch_transformer_controller();
+  ui::DeviceDataManager* device_manager = ui::DeviceDataManager::GetInstance();
+
+  tt_controller->force_compute_mirror_mode_touch_transformer_ = true;
+  device_manager->UpdateTouchInfoForDisplay(
+      internal_display_info,
+      tt_controller->GetMirrorModeTouchTransformer(internal_display_info));
+
+  tt_controller->force_compute_mirror_mode_touch_transformer_ = false;
+  device_manager->UpdateTouchInfoForDisplay(
+      external_display_info,
+      tt_controller->GetMirrorModeTouchTransformer(external_display_info));
+
+  EXPECT_EQ(1, device_manager->GetDisplayForTouchDevice(10));
+  EXPECT_EQ(2, device_manager->GetDisplayForTouchDevice(11));
+
+  // External touch display has the default TouchTransformer.
+  float x = 100.0;
+  float y = 100.0;
+  device_manager->ApplyTouchTransformer(11, &x, &y);
+  EXPECT_EQ(100, x);
+  EXPECT_EQ(100, y);
+
+  // In pillarboxing, there is (1-768*(1024/768)/1366)/2 = 12.5% of the
+  // width on both the left & rigth region of the screen is blank.
+  // When touch events coming at X range [0, 1024), the mapping should be
+  // [0, ~128] ---> < 0
+  // [~128, ~896] ---> [0, 1024)
+  // [~896, 1024] ---> >= 1024
+  x = 128.0;
+  y = 100.0;
+  device_manager->ApplyTouchTransformer(10, &x, &y);
+  EXPECT_EQ(0, static_cast<int>(x));
+  EXPECT_EQ(100, static_cast<int>(y));
+
+  x = 896.0;
+  y = 100.0;
+  device_manager->ApplyTouchTransformer(10, &x, &y);
+  EXPECT_EQ(1024, static_cast<int>(x));
+  EXPECT_EQ(100, static_cast<int>(y));
+}
+
+TEST_F(TouchTransformerControllerTest, TouchTransformerExtendedMode) {
+  // The internal display has size 1366 x 768. The external display has
+  // size 2560x1600. The total frame buffer is 2560x2428,
+  // where 2428 = 768 + 60 (hidden gap) + 1600
+  // and the sceond monitor is translated to Point (0, 828) in the
+  // framebuffer.
+  DisplayInfo display1 = CreateDisplayInfo(1, 5, gfx::Rect(0, 0, 1366, 768));
+  DisplayInfo display2 = CreateDisplayInfo(2, 6, gfx::Rect(0, 828, 2560, 1600));
+  gfx::Size fb_size(2560, 2428);
+
+  TouchTransformerController* tt_controller =
+      Shell::GetInstance()->touch_transformer_controller();
+  ui::DeviceDataManager* device_manager = ui::DeviceDataManager::GetInstance();
+
+  device_manager->UpdateTouchInfoForDisplay(
+      display1,
+      tt_controller->GetExtendedModeTouchTransformer(display1, fb_size));
+
+  device_manager->UpdateTouchInfoForDisplay(
+      display2,
+      tt_controller->GetExtendedModeTouchTransformer(display2, fb_size));
+
+  EXPECT_EQ(1, device_manager->GetDisplayForTouchDevice(5));
+  EXPECT_EQ(2, device_manager->GetDisplayForTouchDevice(6));
+
+  // Mapping for touch events from internal touch display:
+  // [0, 2560) x [0, 2428) -> [0, 1366) x [0, 768)
+  float x = 0.0;
+  float y = 0.0;
+  device_manager->ApplyTouchTransformer(5, &x, &y);
+  EXPECT_EQ(0, static_cast<int>(x));
+  EXPECT_EQ(0, static_cast<int>(y));
+
+  x = 2559.0;
+  y = 2427.0;
+  device_manager->ApplyTouchTransformer(5, &x, &y);
+  EXPECT_EQ(1365, static_cast<int>(x));
+  EXPECT_EQ(767, static_cast<int>(y));
+
+  // Mapping for touch events from external touch display:
+  // [0, 2560) x [0, 2428) -> [0, 2560) x [0, 1600)
+  x = 0.0;
+  y = 0.0;
+  device_manager->ApplyTouchTransformer(6, &x, &y);
+  EXPECT_EQ(0, static_cast<int>(x));
+  EXPECT_EQ(0, static_cast<int>(y));
+
+  x = 2559.0;
+  y = 2427.0;
+  device_manager->ApplyTouchTransformer(6, &x, &y);
+  EXPECT_EQ(2559, static_cast<int>(x));
+  EXPECT_EQ(1599, static_cast<int>(y));
+}
+
+}  // namespace ash