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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/device_data_manager.h"
#include "base/at_exit.h"
#include "base/bind.h"
#include "base/logging.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;
}
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;
}
}
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::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;
}
} // namespace ui
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