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// Copyright 2013 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 "chrome/browser/chromeos/device_uma.h"
#include <X11/extensions/XInput.h>
#include <X11/extensions/XInput2.h>
#include "base/logging.h"
#include "base/memory/singleton.h"
#include "base/metrics/histogram.h"
#include "ui/events/event_constants.h"
#include "ui/events/event_utils.h"
#include "ui/events/platform/platform_event_source.h"
#include "ui/events/x/device_data_manager_x11.h"
// Enum type for CrOS gesture lib UMA
enum UMACrosGestureMetricsType{
// To give an estimated number of all interested events.
UMA_CROS_GESTURE_METRICS_ALL_EVENTS,
UMA_CROS_GESTURE_METRICS_NOISY_GROUND,
// NOTE: Add states only immediately above this line. Make sure to
// update the enum list in tools/metrics/histograms/histograms.xml
// accordingly.
UMA_CROS_GESTURE_METRICS_COUNT
};
namespace chromeos {
DeviceUMA* DeviceUMA::GetInstance() {
return Singleton<DeviceUMA>::get();
}
DeviceUMA::DeviceUMA()
: stopped_(false) {
ui::PlatformEventSource::GetInstance()->AddPlatformEventObserver(this);
}
DeviceUMA::~DeviceUMA() {
Stop();
}
void DeviceUMA::Stop() {
if (stopped_)
return;
ui::PlatformEventSource::GetInstance()->RemovePlatformEventObserver(this);
stopped_ = true;
}
void DeviceUMA::WillProcessEvent(const ui::PlatformEvent& event) {
CheckIncomingEvent(event);
}
void DeviceUMA::DidProcessEvent(const ui::PlatformEvent& event) {
}
void DeviceUMA::CheckTouchpadEvent(XEvent* native_event) {
XIDeviceEvent* xiev =
static_cast<XIDeviceEvent*>(native_event->xcookie.data);
// We take only the slave event since there is no need to count twice.
if (xiev->deviceid != xiev->sourceid)
return;
UMA_HISTOGRAM_ENUMERATION("Touchpad.Metrics",
UMA_CROS_GESTURE_METRICS_ALL_EVENTS,
UMA_CROS_GESTURE_METRICS_COUNT);
// Check for the CrOS touchpad metrics gesture
ui::DeviceDataManagerX11 *manager = ui::DeviceDataManagerX11::GetInstance();
if (manager->IsCMTMetricsEvent(native_event)) {
ui::GestureMetricsType type;
float data1, data2;
manager->GetMetricsData(native_event, &type, &data1, &data2);
// We currently track only the noisy ground issue. Please see
// http://crbug.com/237683.
if (type == ui::kGestureMetricsTypeNoisyGround) {
UMA_HISTOGRAM_ENUMERATION("Touchpad.Metrics",
UMA_CROS_GESTURE_METRICS_NOISY_GROUND,
UMA_CROS_GESTURE_METRICS_COUNT);
}
}
}
void DeviceUMA::CheckIncomingEvent(XEvent* event) {
switch (event->type) {
case GenericEvent: {
ui::DeviceDataManagerX11* devices =
ui::DeviceDataManagerX11::GetInstance();
if (devices->IsXIDeviceEvent(event) &&
devices->IsTouchpadXInputEvent(event)) {
CheckTouchpadEvent(event);
}
break;
}
default:
break;
}
return;
}
} // namespace chromeos
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