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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_RENDERER_LANGUAGE_DETECTION_AGENT_H_
#define COMPONENTS_LANGUAGE_DETECTION_CONTENT_RENDERER_LANGUAGE_DETECTION_AGENT_H_
#include "base/memory/weak_ptr.h"
#include "components/language_detection/content/common/language_detection.mojom.h"
#include "components/language_detection/content/renderer/language_detection_model_manager.h"
#include "content/public/renderer/render_frame_observer.h"
namespace language_detection {
// This class deals with language detection for translate.
// There is one LanguageDetectionAgent per RenderView.
// TODO(https://crbug.com/380171876): Move this back into
// components/translate.
class LanguageDetectionAgent : public content::RenderFrameObserver {
public:
explicit LanguageDetectionAgent(
content::RenderFrame* render_frame,
language_detection::LanguageDetectionModel& language_detection_model);
LanguageDetectionAgent(const LanguageDetectionAgent&) = delete;
LanguageDetectionAgent& operator=(const LanguageDetectionAgent&) = delete;
~LanguageDetectionAgent() override;
bool waiting_for_first_foreground() { return waiting_for_first_foreground_; }
private:
// content::RenderFrameObserver implementation.
void WasShown() override;
void OnDestruct() override;
void RequestModel();
// Whether the render frame observed by |this| was initially hidden and
// the request for a model is delayed until the frame is in the foreground.
bool waiting_for_first_foreground_;
// Not owned by `this`. It must outlive `this`.
const raw_ref<language_detection::LanguageDetectionModel>
language_detection_model_;
LanguageDetectionModelManager language_detection_model_manager_;
// Weak pointer factory used to provide references to the translate host.
base::WeakPtrFactory<LanguageDetectionAgent> weak_pointer_factory_{this};
};
} // namespace language_detection
#endif // COMPONENTS_LANGUAGE_DETECTION_CONTENT_RENDERER_LANGUAGE_DETECTION_AGENT_H_
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