content/child/web_data_consumer_handle_impl.h

   1 // Copyright 2014 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_WEB_DATA_CONSUMER_HANDLE_IMPL_H_
   6 #define CONTENT_CHILD_WEB_DATA_CONSUMER_HANDLE_IMPL_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "content/common/content_export.h"
  10 #include "mojo/message_pump/handle_watcher.h"
  11 #include "third_party/WebKit/public/platform/WebDataConsumerHandle.h"
  12 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h"
  13
  14 namespace content {
  15
  16 class CONTENT_EXPORT WebDataConsumerHandleImpl final
  17     : public NON_EXPORTED_BASE(blink::WebDataConsumerHandle) {
  18   typedef mojo::ScopedDataPipeConsumerHandle Handle;
  19   class Context;
  20
  21  public:
  22   class CONTENT_EXPORT ReaderImpl final : public NON_EXPORTED_BASE(Reader) {
  23    public:
  24     ReaderImpl(scoped_refptr<Context> context, Client* client);
  25     virtual ~ReaderImpl();
  26     virtual Result read(void* data, size_t size, Flags flags, size_t* readSize);
  27     virtual Result beginRead(const void** buffer,
  28                              Flags flags,
  29                              size_t* available);
  30     virtual Result endRead(size_t readSize);
  31
  32    private:
  33     Result HandleReadResult(MojoResult);
  34     void StartWatching();
  35     void OnHandleGotReadable(MojoResult);
  36
  37     scoped_refptr<Context> context_;
  38     mojo::common::HandleWatcher handle_watcher_;
  39     Client* client_;
  40   };
  41   scoped_ptr<Reader> ObtainReader(Client* client);
  42
  43   explicit WebDataConsumerHandleImpl(Handle handle);
  44   virtual ~WebDataConsumerHandleImpl();
  45
  46  private:
  47   virtual ReaderImpl* obtainReaderInternal(Client* client);
  48   const char* debugName() const override;
  49
  50   scoped_refptr<Context> context_;
  51 };
  52
  53 }  // namespace content
  54
  55 #endif  // CONTENT_CHILD_WEB_DATA_CONSUMER_HANDLE_IMPL_H_