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// Copyright 2020 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_PAGE_LOAD_METRICS_OBSERVERS_JAVASCRIPT_FRAMEWORKS_UKM_OBSERVER_H_
#define CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_JAVASCRIPT_FRAMEWORKS_UKM_OBSERVER_H_
#include "components/page_load_metrics/browser/page_load_metrics_observer.h"
#include "third_party/blink/public/common/loader/javascript_framework_detection.h"
#include "third_party/blink/public/common/loader/loading_behavior_flag.h"
// If URL-Keyed-Metrics (UKM) is enabled in the system, this is used to
// populate it with JavaScript framework-related page-load metrics.
class JavascriptFrameworksUkmObserver
: public page_load_metrics::PageLoadMetricsObserver {
public:
JavascriptFrameworksUkmObserver();
JavascriptFrameworksUkmObserver(const JavascriptFrameworksUkmObserver&) =
delete;
JavascriptFrameworksUkmObserver& operator=(
const JavascriptFrameworksUkmObserver&) = delete;
~JavascriptFrameworksUkmObserver() override;
// page_load_metrics::PageLoadMetricsObserver
ObservePolicy OnFencedFramesStart(
content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) override;
ObservePolicy OnPrerenderStart(content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) override;
void OnJavaScriptFrameworksObserved(
content::RenderFrameHost* rfh,
const blink::JavaScriptFrameworkDetectionResult&) override;
void OnComplete(const page_load_metrics::mojom::PageLoadTiming&) override;
JavascriptFrameworksUkmObserver::ObservePolicy
FlushMetricsOnAppEnterBackground(
const page_load_metrics::mojom::PageLoadTiming&) override;
void DidActivatePrerenderedPage(
content::NavigationHandle* navigation_handle) override;
private:
// Called towards the end of the page lifecycle to report metrics on the
// frameworks detected.
void RecordJavascriptFrameworkPageLoad();
blink::JavaScriptFrameworkDetectionResult framework_detection_result_;
bool is_in_prerendered_page_ = false;
};
#endif // CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_JAVASCRIPT_FRAMEWORKS_UKM_OBSERVER_H_
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