ui/events/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/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/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   for (int i = 0; i < kMaxDeviceNum; ++i) {
  35     touch_device_to_display_map_[i] = gfx::Display::kInvalidDisplayID;
  36     touch_radius_scale_map_[i] = 1.0;
  37   }
  38 }
  39
  40 DeviceDataManager::~DeviceDataManager() {
  41   CHECK_EQ(this, instance_);
  42   instance_ = NULL;
  43 }
  44
  45 // static
  46 DeviceDataManager* DeviceDataManager::instance() { return instance_; }
  47
  48 // static
  49 void DeviceDataManager::CreateInstance() {
  50   if (instance())
  51     return;
  52
  53   new DeviceDataManager();
  54 }
  55
  56 // static
  57 DeviceDataManager* DeviceDataManager::GetInstance() {
  58   CHECK(instance_) << "DeviceDataManager was not created.";
  59   return instance_;
  60 }
  61
  62 // static
  63 bool DeviceDataManager::HasInstance() {
  64   return instance_ != NULL;
  65 }
  66
  67 void DeviceDataManager::ClearTouchTransformerRecord() {
  68   for (int i = 0; i < kMaxDeviceNum; i++) {
  69     touch_device_transformer_map_[i] = gfx::Transform();
  70     touch_device_to_display_map_[i] = gfx::Display::kInvalidDisplayID;
  71     touch_radius_scale_map_[i] = 1.0;
  72   }
  73 }
  74
  75 bool DeviceDataManager::IsTouchDeviceIdValid(
  76     unsigned int touch_device_id) const {
  77   return (touch_device_id > 0 && touch_device_id < kMaxDeviceNum);
  78 }
  79
  80 void DeviceDataManager::UpdateTouchInfoForDisplay(
  81     int64_t display_id,
  82     unsigned int touch_device_id,
  83     const gfx::Transform& touch_transformer) {
  84   if (IsTouchDeviceIdValid(touch_device_id)) {
  85     touch_device_to_display_map_[touch_device_id] = display_id;
  86     touch_device_transformer_map_[touch_device_id] = touch_transformer;
  87   }
  88 }
  89
  90 void DeviceDataManager::UpdateTouchRadiusScale(unsigned int touch_device_id,
  91                                                double scale) {
  92   if (IsTouchDeviceIdValid(touch_device_id))
  93     touch_radius_scale_map_[touch_device_id] = scale;
  94 }
  95
  96 void DeviceDataManager::ApplyTouchRadiusScale(unsigned int touch_device_id,
  97                                               double* radius) {
  98   if (IsTouchDeviceIdValid(touch_device_id))
  99     *radius = (*radius) * touch_radius_scale_map_[touch_device_id];
 100 }
 101
 102 void DeviceDataManager::ApplyTouchTransformer(unsigned int touch_device_id,
 103                                               float* x,
 104                                               float* y) {
 105   if (IsTouchDeviceIdValid(touch_device_id)) {
 106     gfx::Point3F point(*x, *y, 0.0);
 107     const gfx::Transform& trans =
 108         touch_device_transformer_map_[touch_device_id];
 109     trans.TransformPoint(&point);
 110     *x = point.x();
 111     *y = point.y();
 112   }
 113 }
 114
 115 int64_t DeviceDataManager::GetDisplayForTouchDevice(
 116     unsigned int touch_device_id) const {
 117   if (IsTouchDeviceIdValid(touch_device_id))
 118     return touch_device_to_display_map_[touch_device_id];
 119   return gfx::Display::kInvalidDisplayID;
 120 }
 121
 122 void DeviceDataManager::OnTouchscreenDevicesUpdated(
 123     const std::vector<TouchscreenDevice>& devices) {
 124   if (devices.size() == touchscreen_devices_.size() &&
 125       std::equal(devices.begin(),
 126                  devices.end(),
 127                  touchscreen_devices_.begin(),
 128                  InputDeviceEquals)) {
 129     return;
 130   }
 131   touchscreen_devices_ = devices;
 132   FOR_EACH_OBSERVER(InputDeviceEventObserver,
 133                     observers_,
 134                     OnTouchscreenDeviceConfigurationChanged());
 135 }
 136
 137 void DeviceDataManager::OnKeyboardDevicesUpdated(
 138     const std::vector<KeyboardDevice>& devices) {
 139   if (devices.size() == keyboard_devices_.size() &&
 140       std::equal(devices.begin(),
 141                  devices.end(),
 142                  keyboard_devices_.begin(),
 143                  InputDeviceEquals)) {
 144     return;
 145   }
 146   keyboard_devices_ = devices;
 147   FOR_EACH_OBSERVER(InputDeviceEventObserver,
 148                     observers_,
 149                     OnKeyboardDeviceConfigurationChanged());
 150 }
 151
 152 void DeviceDataManager::AddObserver(InputDeviceEventObserver* observer) {
 153   observers_.AddObserver(observer);
 154 }
 155
 156 void DeviceDataManager::RemoveObserver(InputDeviceEventObserver* observer) {
 157   observers_.RemoveObserver(observer);
 158 }
 159
 160 }  // namespace ui