ui/events/devices/device_data_manager.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/events/devices/device_data_manager.h"
   6
   7 #include "base/at_exit.h"
   8 #include "base/bind.h"
   9 #include "base/logging.h"
  10 #include "ui/events/devices/input_device_event_observer.h"
  11 #include "ui/gfx/display.h"
  12 #include "ui/gfx/geometry/point3_f.h"
  13
  14 namespace ui {
  15
  16 namespace {
  17
  18 bool InputDeviceEquals(const ui::InputDevice& a, const ui::InputDevice& b) {
  19   return a.id == b.id;
  20 }
  21
  22 }  // namespace
  23
  24 // static
  25 DeviceDataManager* DeviceDataManager::instance_ = NULL;
  26
  27 DeviceDataManager::DeviceDataManager() {
  28   CHECK(!instance_) << "Can not create multiple instances of DeviceDataManager";
  29   instance_ = this;
  30
  31   base::AtExitManager::RegisterTask(
  32       base::Bind(&base::DeletePointer<DeviceDataManager>, this));
  33
  34   ClearTouchDeviceAssociations();
  35 }
  36
  37 DeviceDataManager::~DeviceDataManager() {
  38   CHECK_EQ(this, instance_);
  39   instance_ = NULL;
  40 }
  41
  42 // static
  43 DeviceDataManager* DeviceDataManager::instance() { return instance_; }
  44
  45 // static
  46 void DeviceDataManager::CreateInstance() {
  47   if (instance())
  48     return;
  49
  50   new DeviceDataManager();
  51 }
  52
  53 // static
  54 DeviceDataManager* DeviceDataManager::GetInstance() {
  55   CHECK(instance_) << "DeviceDataManager was not created.";
  56   return instance_;
  57 }
  58
  59 // static
  60 bool DeviceDataManager::HasInstance() {
  61   return instance_ != NULL;
  62 }
  63
  64 void DeviceDataManager::ClearTouchDeviceAssociations() {
  65   for (int i = 0; i < kMaxDeviceNum; i++) {
  66     touch_device_transformer_map_[i] = gfx::Transform();
  67     touch_device_to_target_display_map_[i] = gfx::Display::kInvalidDisplayID;
  68     touch_radius_scale_map_[i] = 1.0;
  69   }
  70 }
  71
  72 bool DeviceDataManager::IsTouchDeviceIdValid(
  73     unsigned int touch_device_id) const {
  74   return (touch_device_id > 0 && touch_device_id < kMaxDeviceNum);
  75 }
  76
  77 void DeviceDataManager::UpdateTouchInfoForDisplay(
  78     int64_t target_display_id,
  79     unsigned int touch_device_id,
  80     const gfx::Transform& touch_transformer) {
  81   if (IsTouchDeviceIdValid(touch_device_id)) {
  82     touch_device_to_target_display_map_[touch_device_id] = target_display_id;
  83     touch_device_transformer_map_[touch_device_id] = touch_transformer;
  84   }
  85 }
  86
  87 void DeviceDataManager::UpdateTouchRadiusScale(unsigned int touch_device_id,
  88                                                double scale) {
  89   if (IsTouchDeviceIdValid(touch_device_id))
  90     touch_radius_scale_map_[touch_device_id] = scale;
  91 }
  92
  93 void DeviceDataManager::ApplyTouchRadiusScale(unsigned int touch_device_id,
  94                                               double* radius) {
  95   if (IsTouchDeviceIdValid(touch_device_id))
  96     *radius = (*radius) * touch_radius_scale_map_[touch_device_id];
  97 }
  98
  99 void DeviceDataManager::ApplyTouchTransformer(unsigned int touch_device_id,
 100                                               float* x,
 101                                               float* y) {
 102   if (IsTouchDeviceIdValid(touch_device_id)) {
 103     gfx::Point3F point(*x, *y, 0.0);
 104     const gfx::Transform& trans =
 105         touch_device_transformer_map_[touch_device_id];
 106     trans.TransformPoint(&point);
 107     *x = point.x();
 108     *y = point.y();
 109   }
 110 }
 111
 112 int64_t DeviceDataManager::GetTargetDisplayForTouchDevice(
 113     unsigned int touch_device_id) const {
 114   if (IsTouchDeviceIdValid(touch_device_id))
 115     return touch_device_to_target_display_map_[touch_device_id];
 116   return gfx::Display::kInvalidDisplayID;
 117 }
 118
 119 void DeviceDataManager::OnTouchscreenDevicesUpdated(
 120     const std::vector<TouchscreenDevice>& devices) {
 121   if (devices.size() == touchscreen_devices_.size() &&
 122       std::equal(devices.begin(),
 123                  devices.end(),
 124                  touchscreen_devices_.begin(),
 125                  InputDeviceEquals)) {
 126     return;
 127   }
 128   touchscreen_devices_ = devices;
 129   FOR_EACH_OBSERVER(InputDeviceEventObserver,
 130                     observers_,
 131                     OnTouchscreenDeviceConfigurationChanged());
 132 }
 133
 134 void DeviceDataManager::OnKeyboardDevicesUpdated(
 135     const std::vector<KeyboardDevice>& devices) {
 136   if (devices.size() == keyboard_devices_.size() &&
 137       std::equal(devices.begin(),
 138                  devices.end(),
 139                  keyboard_devices_.begin(),
 140                  InputDeviceEquals)) {
 141     return;
 142   }
 143   keyboard_devices_ = devices;
 144   FOR_EACH_OBSERVER(InputDeviceEventObserver,
 145                     observers_,
 146                     OnKeyboardDeviceConfigurationChanged());
 147 }
 148
 149 void DeviceDataManager::OnMouseDevicesUpdated(
 150     const std::vector<InputDevice>& devices) {
 151   if (devices.size() == mouse_devices_.size() &&
 152       std::equal(devices.begin(),
 153                  devices.end(),
 154                  mouse_devices_.begin(),
 155                  InputDeviceEquals)) {
 156     return;
 157   }
 158   mouse_devices_ = devices;
 159   FOR_EACH_OBSERVER(InputDeviceEventObserver,
 160                     observers_,
 161                     OnMouseDeviceConfigurationChanged());
 162 }
 163
 164 void DeviceDataManager::OnTouchpadDevicesUpdated(
 165     const std::vector<InputDevice>& devices) {
 166   if (devices.size() == touchpad_devices_.size() &&
 167       std::equal(devices.begin(),
 168                  devices.end(),
 169                  touchpad_devices_.begin(),
 170                  InputDeviceEquals)) {
 171     return;
 172   }
 173   touchpad_devices_ = devices;
 174   FOR_EACH_OBSERVER(InputDeviceEventObserver,
 175                     observers_,
 176                     OnTouchpadDeviceConfigurationChanged());
 177 }
 178
 179 void DeviceDataManager::AddObserver(InputDeviceEventObserver* observer) {
 180   observers_.AddObserver(observer);
 181 }
 182
 183 void DeviceDataManager::RemoveObserver(InputDeviceEventObserver* observer) {
 184   observers_.RemoveObserver(observer);
 185 }
 186
 187 }  // namespace ui