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data_source_delegate.h
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data_source_delegate.h
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// Copyright 2017 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 COMPONENTS_EXO_DATA_SOURCE_DELEGATE_H_
#define COMPONENTS_EXO_DATA_SOURCE_DELEGATE_H_
#include <string>
#include "base/files/scoped_file.h"
namespace exo {
class DataSource;
// Handles events on data devices in context-specific ways.
class DataSourceDelegate {
public:
// Called at the top of the data device's destructor, to give observers a
// chance to remove themselves.
virtual void OnDataSourceDestroying(DataSource* source) = 0;
// Called when a target accepts an offered mime type.
virtual void OnTarget(const std::string& mime_type) = 0;
// Called when the data is requested.
virtual void OnSend(const std::string& mime_type, base::ScopedFD fd) = 0;
// Called when selection was cancelled.
virtual void OnCancelled() = 0;
// Called when the drag-and-drop operation physically finished.
virtual void OnDndDropPerformed() = 0;
// Called when the drag-and-drop operation concluded.
virtual void OnDndFinished() = 0;
// Called when the action is selected by the compositor.
virtual void OnAction(DndAction dnd_action) = 0;
protected:
virtual ~DataSourceDelegate() {}
};
} // namespace exo
#endif // COMPONENTS_EXO_DATA_SOURCE_DELEGATE_H_