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// Copyright 2024 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_LANGUAGE_DETECTION_CONTENT_BROWSER_CONTENT_LANGUAGE_DETECTION_DRIVER_H_
#define COMPONENTS_LANGUAGE_DETECTION_CONTENT_BROWSER_CONTENT_LANGUAGE_DETECTION_DRIVER_H_
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/supports_user_data.h"
#include "components/language_detection/content/common/language_detection.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver_set.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace language_detection {
class LanguageDetectionModelProvider;
// Content implementation of LanguageDetectionDriver.
class ContentLanguageDetectionDriver
: public mojom::ContentLanguageDetectionDriver,
public base::SupportsUserData::Data {
public:
// `language_detection_model_provider` is not owned by and must outlive
// `this`.
explicit ContentLanguageDetectionDriver(
LanguageDetectionModelProvider* language_detection_model_provider);
ContentLanguageDetectionDriver(const ContentLanguageDetectionDriver&) =
delete;
ContentLanguageDetectionDriver& operator=(
const ContentLanguageDetectionDriver&) = delete;
~ContentLanguageDetectionDriver() override;
// Adds a receiver in `receivers_` for the passed `receiver`.
void AddReceiver(
mojo::PendingReceiver<mojom::ContentLanguageDetectionDriver> receiver);
// translate::mojom::ContentTranslateDriver implementation:
void GetLanguageDetectionModel(
GetLanguageDetectionModelCallback callback) override;
void GetLanguageDetectionModelStatus(
GetLanguageDetectionModelStatusCallback callback) override;
protected:
// Notifies `this` that the translate model service is available for model
// requests or is invalidating existing requests specified by `is_available`.
// `callback` will be either forwarded to a request to get the actual model
// file or will be run with an empty file if the translate model service is
// rejecting requests.
void OnLanguageModelFileAvailabilityChanged(
GetLanguageDetectionModelCallback callback,
bool is_available);
// ContentTranslateDriver is a singleton per web contents but multiple render
// frames may be contained in a single web contents. TranslateAgents get the
// other end of this receiver in the form of a ContentTranslateDriver.
mojo::ReceiverSet<language_detection::mojom::ContentLanguageDetectionDriver>
receivers_;
// Provides access to the model file needed for language detection.
const raw_ptr<LanguageDetectionModelProvider>
language_detection_model_provider_;
base::WeakPtrFactory<ContentLanguageDetectionDriver> weak_pointer_factory_{
this};
};
} // namespace language_detection
#endif // COMPONENTS_LANGUAGE_DETECTION_CONTENT_BROWSER_CONTENT_LANGUAGE_DETECTION_DRIVER_H_
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