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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/stats_collection_controller.h"
#include "base/json/json_writer.h"
#include "base/metrics/histogram_base.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/statistics_recorder.h"
#include "base/strings/string_util.h"
#include "content/common/renderer_host.mojom.h"
#include "content/renderer/render_thread_impl.h"
#include "gin/handle.h"
#include "gin/object_template_builder.h"
#include "third_party/blink/public/platform/scheduler/web_agent_group_scheduler.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/blink/public/web/web_view.h"
#include "v8/include/v8-context.h"
namespace content {
// static
gin::WrapperInfo StatsCollectionController::kWrapperInfo = {
gin::kEmbedderNativeGin
};
// static
void StatsCollectionController::Install(blink::WebLocalFrame* frame) {
v8::Isolate* isolate = frame->GetAgentGroupScheduler()->Isolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = frame->MainWorldScriptContext();
if (context.IsEmpty())
return;
v8::Context::Scope context_scope(context);
gin::Handle<StatsCollectionController> controller =
gin::CreateHandle(isolate, new StatsCollectionController());
if (controller.IsEmpty())
return;
v8::Local<v8::Object> global = context->Global();
global
->Set(context, gin::StringToV8(isolate, "statsCollectionController"),
controller.ToV8())
.Check();
}
StatsCollectionController::StatsCollectionController() {}
StatsCollectionController::~StatsCollectionController() {}
gin::ObjectTemplateBuilder StatsCollectionController::GetObjectTemplateBuilder(
v8::Isolate* isolate) {
return gin::Wrappable<StatsCollectionController>::GetObjectTemplateBuilder(
isolate)
.SetMethod("getHistogram", &StatsCollectionController::GetHistogram)
.SetMethod("getBrowserHistogram",
&StatsCollectionController::GetBrowserHistogram);
}
std::string StatsCollectionController::GetHistogram(
const std::string& histogram_name) {
base::HistogramBase* histogram =
base::StatisticsRecorder::FindHistogram(histogram_name);
std::string output;
if (!histogram) {
output = "{}";
} else {
histogram->WriteJSON(&output, base::JSON_VERBOSITY_LEVEL_FULL);
}
return output;
}
std::string StatsCollectionController::GetBrowserHistogram(
const std::string& histogram_name) {
std::string histogram_json;
RenderThreadImpl::current()->GetRendererHost()->GetBrowserHistogram(
histogram_name, &histogram_json);
return histogram_json;
}
} // namespace content
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