chromium/src/third_party/blink/renderer/core/fileapi/file_reader_loader_client.h

/*
 * Copyright (C) 2010 Google Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_FILEAPI_FILE_READER_LOADER_CLIENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_FILEAPI_FILE_READER_LOADER_CLIENT_H_

#include "base/notreached.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/wtf/assertions.h"

namespace blink {

enum class FileErrorCode;

// For more information on how to read Blobs in your specific situation, see:
// https://chromium.googlesource.com/chromium/src/+/HEAD/storage/browser/blob/README.md#accessing-reading
class CORE_EXPORT FileReaderLoaderClient {
 public:
  virtual ~FileReaderLoaderClient() = default;

  virtual void DidStartLoading() = 0;
  // Clients must implement this method if they are using any ReadType except
  // ReadByClient.
  virtual void DidReceiveData() { NOTREACHED(); }
  // Clients must implement this method if they are using the ReadByClient
  // ReadType.
  virtual void DidReceiveDataForClient(const char* data, unsigned data_length) {
    NOTREACHED();
  }
  virtual void DidFinishLoading() = 0;
  virtual void DidFail(FileErrorCode) = 0;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_FILEAPI_FILE_READER_LOADER_CLIENT_H_