content/browser/renderer_host/pepper/pepper_file_ref_host.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_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FILE_REF_HOST_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FILE_REF_HOST_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/weak_ptr.h"
  11 #include "content/public/browser/browser_ppapi_host.h"
  12 #include "ppapi/c/pp_file_info.h"
  13 #include "ppapi/c/pp_instance.h"
  14 #include "ppapi/c/pp_resource.h"
  15 #include "ppapi/c/pp_time.h"
  16 #include "ppapi/host/host_message_context.h"
  17 #include "ppapi/host/resource_host.h"
  18 #include "storage/browser/fileapi/file_system_url.h"
  19
  20 namespace content {
  21 class PepperFileRefHost;
  22 class PepperFileSystemBrowserHost;
  23
  24 // Internal and external filesystems have very different codepaths for
  25 // performing FileRef operations. The logic is split into separate classes
  26 // to make it easier to read.
  27 class PepperFileRefBackend {
  28  public:
  29   virtual ~PepperFileRefBackend();
  30
  31   virtual int32_t MakeDirectory(ppapi::host::ReplyMessageContext context,
  32                                 int32_t make_directory_flags) = 0;
  33   virtual int32_t Touch(ppapi::host::ReplyMessageContext context,
  34                         PP_Time last_accessed_time,
  35                         PP_Time last_modified_time) = 0;
  36   virtual int32_t Delete(ppapi::host::ReplyMessageContext context) = 0;
  37   virtual int32_t Rename(ppapi::host::ReplyMessageContext context,
  38                          PepperFileRefHost* new_file_ref) = 0;
  39   virtual int32_t Query(ppapi::host::ReplyMessageContext context) = 0;
  40   virtual int32_t ReadDirectoryEntries(
  41       ppapi::host::ReplyMessageContext context) = 0;
  42   virtual int32_t GetAbsolutePath(ppapi::host::ReplyMessageContext context) = 0;
  43   virtual storage::FileSystemURL GetFileSystemURL() const = 0;
  44   virtual base::FilePath GetExternalFilePath() const = 0;
  45
  46   // Returns an error from the pp_errors.h enum.
  47   virtual int32_t CanRead() const = 0;
  48   virtual int32_t CanWrite() const = 0;
  49   virtual int32_t CanCreate() const = 0;
  50   virtual int32_t CanReadWrite() const = 0;
  51 };
  52
  53 class CONTENT_EXPORT PepperFileRefHost
  54     : public ppapi::host::ResourceHost,
  55       public base::SupportsWeakPtr<PepperFileRefHost> {
  56  public:
  57   PepperFileRefHost(BrowserPpapiHost* host,
  58                     PP_Instance instance,
  59                     PP_Resource resource,
  60                     PP_Resource file_system,
  61                     const std::string& internal_path);
  62
  63   PepperFileRefHost(BrowserPpapiHost* host,
  64                     PP_Instance instance,
  65                     PP_Resource resource,
  66                     const base::FilePath& external_path);
  67
  68   ~PepperFileRefHost() override;
  69
  70   // ResourceHost overrides.
  71   int32_t OnResourceMessageReceived(
  72       const IPC::Message& msg,
  73       ppapi::host::HostMessageContext* context) override;
  74   bool IsFileRefHost() override;
  75
  76   // Required to support Rename().
  77   PP_FileSystemType GetFileSystemType() const;
  78   storage::FileSystemURL GetFileSystemURL() const;
  79
  80   // Required to support FileIO.
  81   base::FilePath GetExternalFilePath() const;
  82   base::WeakPtr<PepperFileSystemBrowserHost> GetFileSystemHost() const;
  83
  84   int32_t CanRead() const;
  85   int32_t CanWrite() const;
  86   int32_t CanCreate() const;
  87   int32_t CanReadWrite() const;
  88
  89  private:
  90   int32_t OnMakeDirectory(ppapi::host::HostMessageContext* context,
  91                           int32_t make_directory_flags);
  92   int32_t OnTouch(ppapi::host::HostMessageContext* context,
  93                   PP_Time last_access_time,
  94                   PP_Time last_modified_time);
  95   int32_t OnDelete(ppapi::host::HostMessageContext* context);
  96   int32_t OnRename(ppapi::host::HostMessageContext* context,
  97                    PP_Resource new_file_ref);
  98   int32_t OnQuery(ppapi::host::HostMessageContext* context);
  99   int32_t OnReadDirectoryEntries(ppapi::host::HostMessageContext* context);
 100   int32_t OnGetAbsolutePath(ppapi::host::HostMessageContext* context);
 101
 102   BrowserPpapiHost* host_;
 103   scoped_ptr<PepperFileRefBackend> backend_;
 104   base::WeakPtr<PepperFileSystemBrowserHost> file_system_host_;
 105   PP_FileSystemType fs_type_;
 106
 107   DISALLOW_COPY_AND_ASSIGN(PepperFileRefHost);
 108 };
 109
 110 }  // namespace content
 111
 112 #endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FILE_REF_HOST_H_