// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SERVICES_CONTENT_SERVICE_DELEGATE_H_
#define SERVICES_CONTENT_SERVICE_DELEGATE_H_

#include "services/content/public/mojom/navigable_contents.mojom.h"

namespace content {

class NavigableContentsDelegate;
class Service;

// This is a delegate interface which allows the Content Service implementation
// to delegate out to private src/content code without a circular dependency
// between them.
//
// This interface is strictly intended to host transitional APIs for aiding in
// incremental conversion of src/content and its dependents into/onto the
// Content Service. As such, APIs should only be added here with a plan for
// eventual removal.
class ServiceDelegate {
 public:
  virtual ~ServiceDelegate() {}

  // Called when an instance of Service (specifically one using this
  // delegate) is about to be destroyed.
  virtual void WillDestroyServiceInstance(Service* service) = 0;

  // Constructs a new NavigableContentsDelegate implementation to back a new
  // NavigableContentsImpl instance, servicing a client's NavigableContents.
  // |client| is a NavigableContentsClient interface the implementation can use
  // to communicate with the client of this contents.
  virtual std::unique_ptr<NavigableContentsDelegate>
  CreateNavigableContentsDelegate(mojom::NavigableContentsClient* client) = 0;
};

};  // namespace content

#endif  // SERVICES_CONTENT_CONTENT_SERVICE_DELEGATE_H_