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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_WEBUI_WEBUI_LOAD_TIMER_H_
#define CHROME_BROWSER_UI_WEBUI_WEBUI_LOAD_TIMER_H_
#include <memory>
#include <string>
#include "content/public/browser/web_contents_observer.h"
namespace base {
class ElapsedTimer;
}
// Measures and reports page load times for WebUI.
class WebuiLoadTimer : public content::WebContentsObserver {
public:
// Load times are reported to UMA using the provided strings which
// must not be empty.
// * |document_initial_load_uma_id| - corresponds to DOMContentLoaded
// * |document_load_completed_uma_id| - corresponds to
// DocumentOnLoadCompletedInPrimaryMainFrame
WebuiLoadTimer(content::WebContents* web_contents,
const std::string& document_initial_load_uma_id,
const std::string& document_load_completed_uma_id);
WebuiLoadTimer(const WebuiLoadTimer&) = delete;
WebuiLoadTimer& operator=(const WebuiLoadTimer&) = delete;
~WebuiLoadTimer() override;
// WebContentsObserver
void DidStartNavigation(
content::NavigationHandle* navigation_handle) override;
void DOMContentLoaded(content::RenderFrameHost* render_frame_host) override;
void DocumentOnLoadCompletedInPrimaryMainFrame() override;
private:
std::string document_initial_load_uma_id_;
std::string document_load_completed_uma_id_;
std::unique_ptr<base::ElapsedTimer> timer_;
};
#endif // CHROME_BROWSER_UI_WEBUI_WEBUI_LOAD_TIMER_H_
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