File: dialog_model_host.h

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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_BASE_MODELS_DIALOG_MODEL_HOST_H_
#define UI_BASE_MODELS_DIALOG_MODEL_HOST_H_

#include "base/component_export.h"
#include "base/types/pass_key.h"

namespace ui {

class DialogModel;

// Platform-agnostic interface for toolkit integrations.
class COMPONENT_EXPORT(UI_BASE) DialogModelHost {
 public:
  // Immediately closes the DialogModelHost. Calling Close() destroys the
  // DialogModel and no subsequent calls should be made into either DialogModel
  // or DialogModelHost.
  virtual void Close() = 0;

 protected:
  friend class DialogModel;

  // This PassKey is used to make sure that some methods on DialogModel
  // are only called as part of the host integration.
  static base::PassKey<DialogModelHost> GetPassKey() {
    return base::PassKey<DialogModelHost>();
  }

  // TODO(pbos): Turn this into a RepeatingClosure that can be added to a
  // subscriber list in DialogModel.
  // Called when a button changes.
  virtual void OnDialogButtonChanged() = 0;
};

}  // namespace ui

#endif  // UI_BASE_MODELS_DIALOG_MODEL_HOST_H_