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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/waap/waap_ui_metrics_service.h"
#include <string>
#include <string_view>
#include "base/logging.h"
#include "base/metrics/histogram_functions.h"
#include "base/strings/strcat.h"
#include "base/trace_event/trace_event.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/waap/waap_ui_metrics_recorder.h"
#include "chrome/browser/ui/waap/waap_ui_metrics_service_factory.h"
#include "components/startup_metric_utils/browser/startup_metric_utils.h"
#include "components/startup_metric_utils/common/startup_metric_utils.h"
namespace {
std::string_view ReloadButtonModeToString(
WaapUIMetricsRecorder::ReloadButtonMode mode) {
switch (mode) {
case WaapUIMetricsRecorder::ReloadButtonMode::kReload:
return "Reload";
case WaapUIMetricsRecorder::ReloadButtonMode::kStop:
return "Stop";
}
NOTREACHED();
}
std::string_view ReloadButtonInputTypeToString(
WaapUIMetricsRecorder::ReloadButtonInputType type) {
switch (type) {
case WaapUIMetricsRecorder::ReloadButtonInputType::kMouseRelease:
return ".MouseRelease";
case WaapUIMetricsRecorder::ReloadButtonInputType::kKeyPress:
return ".KeyPress";
}
NOTREACHED();
}
// Helper to construct the full histogram name for ReloadButton metrics
std::string BuildReloadButtonHistogramName(std::string_view base,
std::string_view slice = "") {
return base::StrCat({"InitialWebUI.ReloadButton.", base, slice});
}
// Emits a WaaP trace event asynchronously onto a perfetto::Track and records a
// UMA histogram with the same event name.
void EmitHistogramWithTraceEvent(const char* event_name,
base::TimeTicks start_ticks,
base::TimeTicks end_ticks) {
TRACE_EVENT_BEGIN("waap", perfetto::StaticString(event_name),
perfetto::Track(reinterpret_cast<uintptr_t>(event_name)),
start_ticks);
TRACE_EVENT_END("waap",
perfetto::Track(reinterpret_cast<uintptr_t>(event_name)),
end_ticks);
const base::TimeDelta delta = end_ticks - start_ticks;
base::UmaHistogramLongTimes100(event_name, delta);
}
// Emits a WaaP trace event and records a UMA histogram with the given event
// name and duration.
void EmitReloadButtonHistogramWithTraceEvent(const char* event_name,
base::TimeTicks start_ticks,
base::TimeTicks end_ticks) {
const base::TimeDelta duration = end_ticks - start_ticks;
TRACE_EVENT_BEGIN("waap", perfetto::StaticString(event_name),
perfetto::Track(reinterpret_cast<uintptr_t>(event_name)),
start_ticks);
TRACE_EVENT_END("waap",
perfetto::Track(reinterpret_cast<uintptr_t>(event_name)),
end_ticks);
base::UmaHistogramCustomTimes(event_name, duration, base::Milliseconds(1),
base::Minutes(3), 100);
}
void RecordStartupPaintMetric(const char* paint_metric_name,
base::TimeTicks paint_time) {
if (!startup_metric_utils::GetBrowser().ShouldLogStartupHistogram()) {
return;
}
base::TimeTicks time_origin =
startup_metric_utils::GetBrowser().GetApplicationStartTicksForStartup();
if (time_origin.is_null()) {
return;
}
// For early experiment, this is ReloadButton only.
// TODO(crbug.com/448794588): Switch to general name after initial phase.
std::string histogram_name =
base::StrCat({"InitialWebUI.Startup.ReloadButton.", paint_metric_name});
switch (startup_metric_utils::GetBrowser().GetStartupTemperature()) {
case startup_metric_utils::COLD_STARTUP_TEMPERATURE:
histogram_name = base::StrCat({histogram_name, ".ColdStartup"});
break;
case startup_metric_utils::WARM_STARTUP_TEMPERATURE:
histogram_name = base::StrCat({histogram_name, ".WarmStartup"});
break;
case startup_metric_utils::LUKEWARM_STARTUP_TEMPERATURE:
break;
case startup_metric_utils::UNDETERMINED_STARTUP_TEMPERATURE:
break;
case startup_metric_utils::STARTUP_TEMPERATURE_COUNT:
NOTREACHED();
}
EmitHistogramWithTraceEvent(histogram_name.c_str(), time_origin, paint_time);
}
} // namespace
WaapUIMetricsService::WaapUIMetricsService(
base::PassKey<WaapUIMetricsServiceFactory>) {}
WaapUIMetricsService::~WaapUIMetricsService() = default;
// static
WaapUIMetricsService* WaapUIMetricsService::Get(Profile* profile) {
return WaapUIMetricsServiceFactory::GetForProfile(profile);
}
void WaapUIMetricsService::OnFirstPaint(base::TimeTicks time) {
static bool is_first_call = true;
CHECK(!time.is_null());
if (!is_first_call) {
return;
}
is_first_call = false;
RecordStartupPaintMetric("FirstPaint", time);
}
void WaapUIMetricsService::OnFirstContentfulPaint(base::TimeTicks time) {
static bool is_first_call = true;
CHECK(!time.is_null());
if (!is_first_call) {
return;
}
is_first_call = false;
RecordStartupPaintMetric("FirstContentfulPaint", time);
}
void WaapUIMetricsService::OnReloadButtonMousePressToNextPaint(
base::TimeTicks start_ticks,
base::TimeTicks end_ticks) {
auto name = BuildReloadButtonHistogramName("MousePressToNextPaint");
EmitReloadButtonHistogramWithTraceEvent(name.c_str(), start_ticks, end_ticks);
}
void WaapUIMetricsService::OnReloadButtonMouseHoverToNextPaint(
base::TimeTicks start_ticks,
base::TimeTicks end_ticks) {
auto name = BuildReloadButtonHistogramName("MouseHoverToNextPaint");
EmitReloadButtonHistogramWithTraceEvent(name.c_str(), start_ticks, end_ticks);
}
void WaapUIMetricsService::OnReloadButtonInput(
WaapUIMetricsRecorder::ReloadButtonInputType input_type) {
auto name = BuildReloadButtonHistogramName("InputCount");
base::UmaHistogramEnumeration(name, input_type);
}
void WaapUIMetricsService::OnReloadButtonInputToReload(
base::TimeTicks start_ticks,
base::TimeTicks end_ticks,
WaapUIMetricsRecorder::ReloadButtonInputType input_type) {
auto name = BuildReloadButtonHistogramName(
"InputToReload", ReloadButtonInputTypeToString(input_type));
EmitReloadButtonHistogramWithTraceEvent(name.c_str(), start_ticks, end_ticks);
}
void WaapUIMetricsService::OnReloadButtonInputToStop(
base::TimeTicks start_ticks,
base::TimeTicks end_ticks,
WaapUIMetricsRecorder::ReloadButtonInputType input_type) {
auto name = BuildReloadButtonHistogramName(
"InputToStop", ReloadButtonInputTypeToString(input_type));
EmitReloadButtonHistogramWithTraceEvent(name.c_str(), start_ticks, end_ticks);
}
void WaapUIMetricsService::OnReloadButtonInputToNextPaint(
base::TimeTicks start_ticks,
base::TimeTicks end_ticks,
WaapUIMetricsRecorder::ReloadButtonInputType input_type) {
auto name = BuildReloadButtonHistogramName(
"InputToNextPaint", ReloadButtonInputTypeToString(input_type));
EmitReloadButtonHistogramWithTraceEvent(name.c_str(), start_ticks, end_ticks);
}
void WaapUIMetricsService::OnReloadButtonChangeVisibleModeToNextPaint(
base::TimeTicks start_ticks,
base::TimeTicks end_ticks,
WaapUIMetricsRecorder::ReloadButtonMode new_mode) {
auto name = BuildReloadButtonHistogramName(
"ChangeVisibleModeToNextPaintIn", ReloadButtonModeToString(new_mode));
EmitReloadButtonHistogramWithTraceEvent(name.c_str(), start_ticks, end_ticks);
}
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