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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_HANDWRITING_HANDWRITING_RECOGNIZER_IMPL_CROS_H_
#define CONTENT_BROWSER_HANDWRITING_HANDWRITING_RECOGNIZER_IMPL_CROS_H_
#include <string_view>
#include <vector>
#include "chromeos/services/machine_learning/public/cpp/service_connection.h"
#include "chromeos/services/machine_learning/public/mojom/handwriting_recognizer.mojom-forward.h"
#include "chromeos/services/machine_learning/public/mojom/web_platform_handwriting.mojom.h"
#include "content/browser/handwriting/handwriting_recognizer_impl.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/mojom/handwriting/handwriting.mojom-forward.h"
namespace content {
// Implements the mojo API of `mojom::HandwritingRecognizer` between browser and
// renderer for CrOS.
// One renderer process can create multiple objects of this class. All
// recognition requests from renderer must go through the API here for security
// checks etc. This class will also hold a mojo remote to the mlservice daemon
// CrOS and mlservice will create a handwriting model instance for each of this
// class.
class CrOSHandwritingRecognizerImpl final : public HandwritingRecognizerImpl {
public:
// The interface to create an object, called by handwriting service.
static void Create(
handwriting::mojom::HandwritingModelConstraintPtr constraint_blink,
handwriting::mojom::HandwritingRecognitionService::
CreateHandwritingRecognizerCallback callback);
CrOSHandwritingRecognizerImpl(const HandwritingRecognizerImpl&) = delete;
CrOSHandwritingRecognizerImpl& operator=(const HandwritingRecognizerImpl&) =
delete;
~CrOSHandwritingRecognizerImpl() override;
// Returns whether the provided |language_tag| is supported.
static bool SupportsLanguageTag(std::string_view language_tag);
// Returns the description for the model that best satisfies `constraint`.
// Returns nullptr if we can't find such a model.
static handwriting::mojom::QueryHandwritingRecognizerResultPtr
GetModelDescriptor(
handwriting::mojom::HandwritingModelConstraintPtr constraint);
private:
explicit CrOSHandwritingRecognizerImpl(
mojo::PendingRemote<chromeos::machine_learning::web_platform::mojom::
HandwritingRecognizer> pending_remote);
// handwriting::mojom::HandwritingRecognizer
void GetPrediction(
std::vector<handwriting::mojom::HandwritingStrokePtr> strokes,
handwriting::mojom::HandwritingHintsPtr hints,
GetPredictionCallback callback) override;
mojo::Remote<
chromeos::machine_learning::web_platform::mojom::HandwritingRecognizer>
remote_cros_;
};
} // namespace content
#endif // CONTENT_BROWSER_HANDWRITING_HANDWRITING_RECOGNIZER_IMPL_CROS_H_
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