Pepper: Move FileRef to the "new" resource proxy.

content/renderer/pepper/ppb_file_ref_impl.h

-// Copyright (c) 2012 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 CONTENT_RENDERER_PEPPER_PPB_FILE_REF_IMPL_H_
-#define CONTENT_RENDERER_PEPPER_PPB_FILE_REF_IMPL_H_
-
-#include <string>
-#include <vector>
-
-#include "base/callback_forward.h"
-#include "base/files/file_path.h"
-#include "base/id_map.h"
-#include "base/memory/linked_ptr.h"
-#include "base/platform_file.h"
-#include "ipc/ipc_listener.h"
-#include "ipc/ipc_platform_file.h"
-#include "ppapi/c/pp_file_info.h"
-#include "ppapi/c/ppb_file_ref.h"
-#include "ppapi/shared_impl/ppb_file_ref_shared.h"
-#include "ppapi/shared_impl/scoped_pp_resource.h"
-#include "ppapi/shared_impl/var.h"
-#include "url/gurl.h"
-
-namespace ppapi {
-namespace host {
-class ResourceHost;
-}
-}
-
-namespace content {
-
-using ::ppapi::StringVar;
-
-class PepperFileSystemHost;
-
-class PPB_FileRef_Impl : public ::ppapi::PPB_FileRef_Shared,
-                         public IPC::Listener {
- public:
-  PPB_FileRef_Impl(const ::ppapi::PPB_FileRef_CreateInfo& info,
-                   PP_Resource file_system);
-  PPB_FileRef_Impl(const ::ppapi::PPB_FileRef_CreateInfo& info,
-                   const base::FilePath& external_file_path);
-
-  // The returned object will have a refcount of 0 (just like "new").
-  static PPB_FileRef_Impl* CreateInternal(PP_Instance instance,
-                                          PP_Resource pp_file_system,
-                                          const std::string& path);
-
-  // The returned object will have a refcount of 0 (just like "new").
-  static PPB_FileRef_Impl* CreateExternal(
-      PP_Instance instance,
-      const base::FilePath& external_file_path,
-      const std::string& display_name);
-
-  // PPB_FileRef_API implementation (not provided by PPB_FileRef_Shared).
-  virtual PP_Resource GetParent() OVERRIDE;
-  virtual int32_t MakeDirectory(
-      PP_Bool make_ancestors,
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual int32_t Touch(
-      PP_Time last_access_time,
-      PP_Time last_modified_time,
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual int32_t Delete(
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual int32_t Rename(
-      PP_Resource new_file_ref,
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual int32_t Query(
-      PP_FileInfo* info,
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual int32_t ReadDirectoryEntries(
-      const PP_ArrayOutput& output,
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual int32_t QueryInHost(
-      linked_ptr<PP_FileInfo> info,
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual int32_t ReadDirectoryEntriesInHost(
-      linked_ptr<std::vector< ::ppapi::PPB_FileRef_CreateInfo> > files,
-      linked_ptr<std::vector<PP_FileType> > file_types,
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual PP_Var GetAbsolutePath() OVERRIDE;
-
-  PP_Resource file_system_resource() const { return file_system_; }
-
-  // Returns the system path corresponding to this file. Valid only for
-  // external filesystems.
-  base::FilePath GetSystemPath() const;
-
-  // Returns the FileSystem API URL corresponding to this file.
-  GURL GetFileSystemURL() const;
-
-  // Checks if file ref has file system instance and if the instance is opened.
-  bool HasValidFileSystem() const;
-
-  void AddFileSystemRefCount() {
-    file_system_ref_ = file_system_;
-  }
-
- private:
-  virtual ~PPB_FileRef_Impl();
-
-  // IPC::Listener implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-
-  void OnAsyncFileOpened(
-      base::PlatformFileError error_code,
-      IPC::PlatformFileForTransit file_for_transit,
-      int message_id);
-
-  // Many mutation functions are allow only to non-external filesystems, This
-  // function returns true if the filesystem is opened and isn't external as an
-  // access check for these functions.
-  bool IsValidNonExternalFileSystem() const;
-
-  PepperFileSystemHost* GetFileSystemHost() const;
-  static PepperFileSystemHost* GetFileSystemHostInternal(
-      PP_Instance instance, PP_Resource resource);
-
-  // 0 for external filesystems.  This is a plugin side resource that we don't
-  // hold a reference here, so file_system_ could be destroyed earlier than
-  // this object.  Right now we checked the existance in plugin delegate before
-  // use.  But it's better to hold a reference once we migrate FileRef to the
-  // new design.
-  PP_Resource file_system_;
-
-  // Holds a reference of FileSystem when running in process.  See
-  // PPB_FileRef_Proxy for corresponding code for out-of-process mode.  Note
-  // that this ScopedPPResource is only expected to be used when running in
-  // process (since PPB_FileRef_Proxy takes care of out-of-process case).
-  // Also note that this workaround will be no longer needed after FileRef
-  // refactoring.
-  ::ppapi::ScopedPPResource file_system_ref_;
-
-  // Used only for external filesystems.
-  base::FilePath external_file_system_path_;
-
-  // Lazily initialized var created from the external path. This is so we can
-  // return the identical string object every time it is requested.
-  scoped_refptr<StringVar> external_path_var_;
-
-  int routing_id_;
-
-  typedef base::Callback<void (base::PlatformFileError, base::PassPlatformFile)>
-      AsyncOpenFileCallback;
-
-  IDMap<AsyncOpenFileCallback> pending_async_open_files_;
-
-  DISALLOW_COPY_AND_ASSIGN(PPB_FileRef_Impl);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_PEPPER_PPB_FILE_REF_IMPL_H_