text: /*
   * 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.
   *     * Neither the name of Google Inc. nor the names of its
   * 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
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef FileWriter_h
  #define FileWriter_h
  
  #include "core/dom/ActiveDOMObject.h"
  #include "core/dom/ExecutionContext.h"
  #include "core/fileapi/FileError.h"
  #include "modules/EventTargetModules.h"
  #include "modules/filesystem/FileWriterBase.h"
  #include "platform/heap/Handle.h"
  #include "public/platform/WebFileWriterClient.h"
  #include "wtf/RefPtr.h"
  
  namespace blink {
  
  class Blob;
  class ExceptionState;
  class ExecutionContext;
  
  class FileWriter final
  #if ENABLE(OILPAN)
      : public EventTargetWithInlineData
      , public FileWriterBase
  #else
      : public FileWriterBase
      , public EventTargetWithInlineData
  #endif
      , public ActiveDOMObject
      , public WebFileWriterClient {
      DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<FileWriterBase>);
      DEFINE_WRAPPERTYPEINFO();
      WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(FileWriter);
  public:
      static FileWriter* create(ExecutionContext*);
  
      enum ReadyState {
          INIT = 0,
          WRITING = 1,
          DONE = 2
      };
  
      void write(Blob*, ExceptionState&);
      void seek(long long position, ExceptionState&);
      void truncate(long long length, ExceptionState&);
      void abort(ExceptionState&);
      ReadyState readyState() const { return m_readyState; }
      FileError* error() const { return m_error.get(); }
  
      // WebFileWriterClient
      virtual void didWrite(long long bytes, bool complete) override;
      virtual void didTruncate() override;
      virtual void didFail(WebFileError) override;
  
      // ActiveDOMObject
      virtual void stop() override;
      virtual bool hasPendingActivity() const override;
  
      // EventTarget
      virtual const AtomicString& interfaceName() const override;
      virtual ExecutionContext* executionContext() const override { return ActiveDOMObject::executionContext(); }
  
      DEFINE_ATTRIBUTE_EVENT_LISTENER(writestart);
      DEFINE_ATTRIBUTE_EVENT_LISTENER(progress);
      DEFINE_ATTRIBUTE_EVENT_LISTENER(write);
      DEFINE_ATTRIBUTE_EVENT_LISTENER(abort);
      DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
      DEFINE_ATTRIBUTE_EVENT_LISTENER(writeend);
  
      DECLARE_VIRTUAL_TRACE();
  
  private:
      enum Operation {
          OperationNone,
          OperationWrite,
          OperationTruncate,
          OperationAbort
      };
  
      FileWriter(ExecutionContext*);
  
      virtual ~FileWriter();
  
      void completeAbort();
  
      void doOperation(Operation);
  
      void signalCompletion(FileError::ErrorCode);
  
      void fireEvent(const AtomicString& type);
  
      void setError(FileError::ErrorCode, ExceptionState&);
  
      Member<FileError> m_error;
      ReadyState m_readyState;
      Operation m_operationInProgress;
      Operation m_queuedOperation;
      long long m_bytesWritten;
      long long m_bytesToWrite;
      long long m_truncateLength;
      long long m_numAborts;
      long long m_recursionDepth;
      double m_lastProgressNotificationTimeMS;
      Member<Blob> m_blobBeingWritten;
      int m_asyncOperationId;
  };
  
  } // namespace blink
  
  #endif // FileWriter_h
  