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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_DOM_DISTILLER_CONTENT_BROWSER_DISTILLABILITY_DRIVER_H_
#define COMPONENTS_DOM_DISTILLER_CONTENT_BROWSER_DISTILLABILITY_DRIVER_H_
#include <optional>
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "components/dom_distiller/content/browser/distillable_page_utils.h"
#include "components/dom_distiller/content/browser/uma_helper.h"
#include "components/dom_distiller/content/common/mojom/distillability_service.mojom.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
namespace dom_distiller {
// This is an IPC helper for determining whether a page should be distilled.
class DistillabilityDriver
: public content::WebContentsUserData<DistillabilityDriver>,
public content::WebContentsObserver {
public:
~DistillabilityDriver() override;
void CreateDistillabilityService(
mojo::PendingReceiver<mojom::DistillabilityService> receiver);
base::ObserverList<DistillabilityObserver>* GetObserverList() {
return &observers_;
}
std::optional<DistillabilityResult> GetLatestResult() const {
return latest_result_;
}
// Sets a callback which can be used to determine the security of a page,
// to decide whether it can be distilled. Only SECURE pages are currently
// distillable on Desktop. Android does not check page security status
// before distilling.
void SetIsSecureCallback(
base::RepeatingCallback<bool(content::WebContents*)> is_secure_check);
UMAHelper::DistillabilityDriverTimer& GetTimer() { return timer_; }
// content::WebContentsObserver overrides.
void PrimaryPageChanged(content::Page& page) override;
DistillabilityDriver(const DistillabilityDriver&) = delete;
DistillabilityDriver& operator=(const DistillabilityDriver&) = delete;
private:
explicit DistillabilityDriver(content::WebContents* web_contents);
friend class content::WebContentsUserData<DistillabilityDriver>;
friend class DistillabilityServiceImpl;
void OnDistillability(const DistillabilityResult& result);
base::ObserverList<DistillabilityObserver> observers_;
// The most recently received result from the distillability service.
//
// TODO(crbug.com/40622813): Set this to nullopt when navigating to a
// new page, accounting for same-document navigation.
std::optional<DistillabilityResult> latest_result_;
// For UMA metrics on durations spent in distilled or distillable pages.
// Because each DistillabilityDriver is associated with just one WebContents,
// it can be used to track the amount of time spent actively viewing that
// WebContents when the page is distillable or distilled, creating useful
// metrics for the ReaderMode experiment.
UMAHelper::DistillabilityDriverTimer timer_;
base::RepeatingCallback<bool(content::WebContents*)> is_secure_check_;
base::WeakPtrFactory<DistillabilityDriver> weak_factory_{this};
WEB_CONTENTS_USER_DATA_KEY_DECL();
};
} // namespace dom_distiller
#endif // COMPONENTS_DOM_DISTILLER_CONTENT_BROWSER_DISTILLABILITY_DRIVER_H_
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