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      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   virtual ~PepperFileRefHost();
     69 
     70   // ResourceHost overrides.
     71   virtual int32_t OnResourceMessageReceived(
     72       const IPC::Message& msg,
     73       ppapi::host::HostMessageContext* context) OVERRIDE;
     74   virtual 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_
    113