content/child/fileapi/webfilewriter_impl.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_CHILD_FILEAPI_WEBFILEWRITER_IMPL_H_
   6 #define CONTENT_CHILD_FILEAPI_WEBFILEWRITER_IMPL_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/message_loop/message_loop_proxy.h"
  13 #include "content/child/fileapi/webfilewriter_base.h"
  14
  15 namespace content {
  16
  17 // An implementation of WebFileWriter for use in chrome renderers and workers.
  18 class WebFileWriterImpl : public WebFileWriterBase,
  19                           public base::SupportsWeakPtr<WebFileWriterImpl> {
  20  public:
  21   enum Type {
  22     TYPE_SYNC,
  23     TYPE_ASYNC,
  24   };
  25
  26   WebFileWriterImpl(const GURL& path,
  27                     blink::WebFileWriterClient* client,
  28                     Type type,
  29                     const scoped_refptr<base::SingleThreadTaskRunner>&
  30                         main_thread_task_runner);
  31   virtual ~WebFileWriterImpl();
  32
  33  protected:
  34   // WebFileWriterBase overrides
  35   void DoTruncate(const GURL& path, int64 offset) override;
  36   void DoWrite(const GURL& path,
  37                const std::string& blob_id,
  38                int64 offset) override;
  39   void DoCancel() override;
  40
  41  private:
  42   class WriterBridge;
  43
  44   void RunOnMainThread(const base::Closure& closure);
  45
  46   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
  47   scoped_refptr<WriterBridge> bridge_;
  48 };
  49
  50 }  // namespace content
  51
  52 #endif  // CONTENT_CHILD_FILEAPI_WEBFILEWRITER_IMPL_H_