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// 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/devices/device_data_manager.h"
#include "base/at_exit.h"
#include "base/bind.h"
#include "base/logging.h"
#include "ui/events/devices/input_device_event_observer.h"
#include "ui/gfx/display.h"
#include "ui/gfx/geometry/point3_f.h"
namespace ui {
namespace {
bool InputDeviceEquals(const ui::InputDevice& a, const ui::InputDevice& b) {
return a.id == b.id;
}
} // namespace
// 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));
ClearTouchDeviceAssociations();
}
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::ClearTouchDeviceAssociations() {
for (int i = 0; i < kMaxDeviceNum; i++) {
touch_device_transformer_map_[i] = gfx::Transform();
touch_device_to_target_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 target_display_id,
int touch_device_id,
const gfx::Transform& touch_transformer) {
if (IsTouchDeviceIdValid(touch_device_id)) {
touch_device_to_target_display_map_[touch_device_id] = target_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::GetTargetDisplayForTouchDevice(
int touch_device_id) const {
if (IsTouchDeviceIdValid(touch_device_id))
return touch_device_to_target_display_map_[touch_device_id];
return gfx::Display::kInvalidDisplayID;
}
void DeviceDataManager::OnTouchscreenDevicesUpdated(
const std::vector<TouchscreenDevice>& devices) {
if (devices.size() == touchscreen_devices_.size() &&
std::equal(devices.begin(),
devices.end(),
touchscreen_devices_.begin(),
InputDeviceEquals)) {
return;
}
touchscreen_devices_ = devices;
FOR_EACH_OBSERVER(InputDeviceEventObserver,
observers_,
OnTouchscreenDeviceConfigurationChanged());
}
void DeviceDataManager::OnKeyboardDevicesUpdated(
const std::vector<KeyboardDevice>& devices) {
if (devices.size() == keyboard_devices_.size() &&
std::equal(devices.begin(),
devices.end(),
keyboard_devices_.begin(),
InputDeviceEquals)) {
return;
}
keyboard_devices_ = devices;
FOR_EACH_OBSERVER(InputDeviceEventObserver,
observers_,
OnKeyboardDeviceConfigurationChanged());
}
void DeviceDataManager::OnMouseDevicesUpdated(
const std::vector<InputDevice>& devices) {
if (devices.size() == mouse_devices_.size() &&
std::equal(devices.begin(),
devices.end(),
mouse_devices_.begin(),
InputDeviceEquals)) {
return;
}
mouse_devices_ = devices;
FOR_EACH_OBSERVER(InputDeviceEventObserver,
observers_,
OnMouseDeviceConfigurationChanged());
}
void DeviceDataManager::OnTouchpadDevicesUpdated(
const std::vector<InputDevice>& devices) {
if (devices.size() == touchpad_devices_.size() &&
std::equal(devices.begin(),
devices.end(),
touchpad_devices_.begin(),
InputDeviceEquals)) {
return;
}
touchpad_devices_ = devices;
FOR_EACH_OBSERVER(InputDeviceEventObserver,
observers_,
OnTouchpadDeviceConfigurationChanged());
}
void DeviceDataManager::OnDeviceListsComplete() {
if (!device_lists_complete_) {
device_lists_complete_ = true;
FOR_EACH_OBSERVER(InputDeviceEventObserver, observers_,
OnDeviceListsComplete());
}
}
void DeviceDataManager::AddObserver(InputDeviceEventObserver* observer) {
observers_.AddObserver(observer);
}
void DeviceDataManager::RemoveObserver(InputDeviceEventObserver* observer) {
observers_.RemoveObserver(observer);
}
} // namespace ui
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