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

ui/events/device_data_manager.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/device_data_manager.h"
-
-#include "base/at_exit.h"
-#include "base/bind.h"
-#include "base/logging.h"
-#include "ui/events/input_device_event_observer.h"
-#include "ui/gfx/display.h"
-#include "ui/gfx/geometry/point3_f.h"
-
-namespace ui {
-
-// static
-DeviceDataManager* DeviceDataManager::instance_ = NULL;
-
-DeviceDataManager::DeviceDataManager() {
-  CHECK(!instance_) << "Can not create multiple instances of DeviceDataManager";
-  instance_ = this;
-
-  base::AtExitManager::RegisterTask(
-      base::Bind(&base::DeletePointer<DeviceDataManager>, this));
-
-  for (int i = 0; i < kMaxDeviceNum; ++i) {
-    touch_device_to_display_map_[i] = gfx::Display::kInvalidDisplayID;
-    touch_radius_scale_map_[i] = 1.0;
-  }
-}
-
-DeviceDataManager::~DeviceDataManager() {
-  CHECK_EQ(this, instance_);
-  instance_ = NULL;
-}
-
-// static
-DeviceDataManager* DeviceDataManager::instance() { return instance_; }
-
-// static
-void DeviceDataManager::CreateInstance() {
-  if (instance())
-    return;
-
-  new DeviceDataManager();
-}
-
-// static
-DeviceDataManager* DeviceDataManager::GetInstance() {
-  CHECK(instance_) << "DeviceDataManager was not created.";
-  return instance_;
-}
-
-// static
-bool DeviceDataManager::HasInstance() {
-  return instance_ != NULL;
-}
-
-void DeviceDataManager::ClearTouchTransformerRecord() {
-  for (int i = 0; i < kMaxDeviceNum; i++) {
-    touch_device_transformer_map_[i] = gfx::Transform();
-    touch_device_to_display_map_[i] = gfx::Display::kInvalidDisplayID;
-    touch_radius_scale_map_[i] = 1.0;
-  }
-}
-
-bool DeviceDataManager::IsTouchDeviceIdValid(int touch_device_id) const {
-  return (touch_device_id > 0 && touch_device_id < kMaxDeviceNum);
-}
-
-void DeviceDataManager::UpdateTouchInfoForDisplay(
-    int64_t display_id,
-    int touch_device_id,
-    const gfx::Transform& touch_transformer) {
-  if (IsTouchDeviceIdValid(touch_device_id)) {
-    touch_device_to_display_map_[touch_device_id] = display_id;
-    touch_device_transformer_map_[touch_device_id] = touch_transformer;
-  }
-}
-
-void DeviceDataManager::UpdateTouchRadiusScale(int touch_device_id,
-                                               double scale) {
-  if (IsTouchDeviceIdValid(touch_device_id))
-    touch_radius_scale_map_[touch_device_id] = scale;
-}
-
-void DeviceDataManager::ApplyTouchRadiusScale(int touch_device_id,
-                                              double* radius) {
-  if (IsTouchDeviceIdValid(touch_device_id))
-    *radius = (*radius) * touch_radius_scale_map_[touch_device_id];
-}
-
-void DeviceDataManager::ApplyTouchTransformer(int touch_device_id,
-                                              float* x,
-                                              float* y) {
-  if (IsTouchDeviceIdValid(touch_device_id)) {
-    gfx::Point3F point(*x, *y, 0.0);
-    const gfx::Transform& trans =
-        touch_device_transformer_map_[touch_device_id];
-    trans.TransformPoint(&point);
-    *x = point.x();
-    *y = point.y();
-  }
-}
-
-int64_t DeviceDataManager::GetDisplayForTouchDevice(int touch_device_id) const {
-  if (IsTouchDeviceIdValid(touch_device_id))
-    return touch_device_to_display_map_[touch_device_id];
-  return gfx::Display::kInvalidDisplayID;
-}
-
-void DeviceDataManager::OnTouchscreenDevicesUpdated(
-    const std::vector<TouchscreenDevice>& devices) {
-  touchscreen_devices_ = devices;
-
-  FOR_EACH_OBSERVER(InputDeviceEventObserver,
-                    observers_,
-                    OnInputDeviceConfigurationChanged());
-}
-
-void DeviceDataManager::AddObserver(InputDeviceEventObserver* observer) {
-  observers_.AddObserver(observer);
-}
-
-void DeviceDataManager::RemoveObserver(InputDeviceEventObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-}  // namespace ui