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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_ACCESSIBILITY_ACCESSIBILITY_LABELS_SERVICE_H_
#define CHROME_BROWSER_ACCESSIBILITY_ACCESSIBILITY_LABELS_SERVICE_H_
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "build/build_config.h"
#include "components/keyed_service/core/keyed_service.h"
#include "components/prefs/pref_change_registrar.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/image_annotation/public/mojom/image_annotation.mojom.h"
#if BUILDFLAG(IS_ANDROID)
#include "net/base/network_change_notifier.h"
#endif
class Profile;
namespace content {
class ScopedAccessibilityMode;
class WebContents;
}
namespace image_annotation {
class ImageAnnotationService;
}
namespace user_prefs {
class PrefRegistrySyncable;
}
// Manages the feature that generates automatic image labels for accessibility.
// Tracks the per-profile preference and updates the accessibility mode of
// WebContents when it changes, provided image labeling is not disabled via
// command-line switch.
class AccessibilityLabelsService
: public KeyedService
#if BUILDFLAG(IS_ANDROID)
// On Android, implement NetworkChangeObserver for "only on wifi" option.
,
public net::NetworkChangeNotifier::NetworkChangeObserver
#endif
{
public:
// Use |AccessibilityLabelsServiceFactory::GetForProfile(..)| to get
// an instance of this service.
explicit AccessibilityLabelsService(Profile* profile);
AccessibilityLabelsService(const AccessibilityLabelsService&) = delete;
AccessibilityLabelsService& operator=(const AccessibilityLabelsService&) =
delete;
~AccessibilityLabelsService() override;
static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
// Off the record profiles will default to having the feature disabled.
static void InitOffTheRecordPrefs(Profile* off_the_record_profile);
void Init();
void EnableLabelsServiceOnce(content::WebContents* web_contents);
// Routes an Annotator interface receiver to the Image Annotation service for
// binding.
void BindImageAnnotator(
mojo::PendingReceiver<image_annotation::mojom::Annotator> receiver);
// Allows tests to override how this object binds a connection to a remote
// ImageAnnotationService.
using ImageAnnotatorBinder = base::RepeatingCallback<void(
mojo::PendingReceiver<image_annotation::mojom::ImageAnnotationService>)>;
void OverrideImageAnnotatorBinderForTesting(ImageAnnotatorBinder binder);
#if BUILDFLAG(IS_ANDROID)
// net::NetworkChangeNotifier::NetworkChangeObserver
void OnNetworkChanged(
net::NetworkChangeNotifier::ConnectionType type) override;
bool GetAndroidEnabledStatus();
#endif
private:
friend class AccessibilityLabelsServiceFactory;
// Returns true if the profile preference is set and, in the case of Android,
// the device is on Wi-Fi or the "Only on Wi-Fi" preference is not set.
bool IsEnabled();
void OnImageLabelsEnabledChanged();
void UpdateAccessibilityLabelsHistograms();
// Owns us via the KeyedService mechanism.
raw_ptr<Profile> profile_;
PrefChangeRegistrar pref_change_registrar_;
// Implementation of and remote connection to the Image Annotation service.
std::unique_ptr<image_annotation::ImageAnnotationService> service_;
mojo::Remote<image_annotation::mojom::ImageAnnotationService> remote_service_;
// Enables the kLabelImages accessibility mode flag for all tabs associated
// with the service's profile.
std::unique_ptr<content::ScopedAccessibilityMode> scoped_accessibility_mode_;
base::WeakPtrFactory<AccessibilityLabelsService> weak_factory_{this};
};
#endif // CHROME_BROWSER_ACCESSIBILITY_ACCESSIBILITY_LABELS_SERVICE_H_
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