content/browser/renderer_host/pepper/pepper_file_io_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_RENDERER_PEPPER_PEPPER_FILE_IO_HOST_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_FILE_IO_HOST_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback_forward.h"
  12 #include "base/files/file.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "base/platform_file.h"
  15 #include "content/browser/renderer_host/pepper/browser_ppapi_host_impl.h"
  16 #include "ipc/ipc_listener.h"
  17 #include "ipc/ipc_platform_file.h"
  18 #include "ppapi/c/pp_file_info.h"
  19 #include "ppapi/c/pp_time.h"
  20 #include "ppapi/host/host_message_context.h"
  21 #include "ppapi/host/resource_host.h"
  22 #include "ppapi/shared_impl/file_io_state_manager.h"
  23 #include "url/gurl.h"
  24 #include "webkit/browser/fileapi/file_system_context.h"
  25
  26 namespace ppapi {
  27 struct FileGrowth;
  28 }
  29
  30 namespace content {
  31 class PepperFileSystemBrowserHost;
  32
  33 class PepperFileIOHost : public ppapi::host::ResourceHost,
  34                          public base::SupportsWeakPtr<PepperFileIOHost> {
  35  public:
  36   typedef base::Callback<void (base::File::Error)>
  37       NotifyCloseFileCallback;
  38
  39   PepperFileIOHost(BrowserPpapiHostImpl* host,
  40                    PP_Instance instance,
  41                    PP_Resource resource);
  42   virtual ~PepperFileIOHost();
  43
  44   // ppapi::host::ResourceHost override.
  45   virtual int32_t OnResourceMessageReceived(
  46       const IPC::Message& msg,
  47       ppapi::host::HostMessageContext* context) OVERRIDE;
  48
  49   struct UIThreadStuff {
  50     UIThreadStuff();
  51     ~UIThreadStuff();
  52     base::ProcessId resolved_render_process_id;
  53     scoped_refptr<fileapi::FileSystemContext> file_system_context;
  54   };
  55  private:
  56   int32_t OnHostMsgOpen(ppapi::host::HostMessageContext* context,
  57                         PP_Resource file_ref_resource,
  58                         int32_t open_flags);
  59   int32_t OnHostMsgTouch(ppapi::host::HostMessageContext* context,
  60                          PP_Time last_access_time,
  61                          PP_Time last_modified_time);
  62   int32_t OnHostMsgSetLength(ppapi::host::HostMessageContext* context,
  63                              int64_t length);
  64   int32_t OnHostMsgClose(ppapi::host::HostMessageContext* context,
  65                          const ppapi::FileGrowth& file_growth);
  66   int32_t OnHostMsgFlush(ppapi::host::HostMessageContext* context);
  67   int32_t OnHostMsgRequestOSFileHandle(
  68       ppapi::host::HostMessageContext* context);
  69
  70   void GotPluginAllowedToCallRequestOSFileHandle(
  71       ppapi::host::ReplyMessageContext reply_context,
  72       bool plugin_allowed);
  73
  74   // Callback handlers. These mostly convert the File::Error to the
  75   // PP_Error code and send back the reply. Note that the argument
  76   // ReplyMessageContext is copied so that we have a closure containing all
  77   // necessary information to reply.
  78   void ExecutePlatformGeneralCallback(
  79       ppapi::host::ReplyMessageContext reply_context,
  80       base::File::Error error_code);
  81   void ExecutePlatformOpenFileCallback(
  82       ppapi::host::ReplyMessageContext reply_context,
  83       base::File::Error error_code,
  84       base::PassPlatformFile file,
  85       bool unused_created);
  86
  87   void GotUIThreadStuffForInternalFileSystems(
  88       ppapi::host::ReplyMessageContext reply_context,
  89       int platform_file_flags,
  90       UIThreadStuff ui_thread_stuff);
  91   void DidOpenInternalFile(
  92       ppapi::host::ReplyMessageContext reply_context,
  93       base::File::Error result,
  94       base::PlatformFile file,
  95       const base::Closure& on_close_callback);
  96   void GotResolvedRenderProcessId(
  97       ppapi::host::ReplyMessageContext reply_context,
  98       base::FilePath path,
  99       int platform_file_flags,
 100       base::ProcessId resolved_render_process_id);
 101
 102   void DidOpenQuotaFile(ppapi::host::ReplyMessageContext reply_context,
 103                         base::PlatformFile file,
 104                         int64_t max_written_offset);
 105   bool CallSetLength(ppapi::host::ReplyMessageContext reply_context,
 106                      int64_t length);
 107
 108   void DidCloseFile(base::File::Error error);
 109
 110   void SendOpenErrorReply(ppapi::host::ReplyMessageContext reply_context);
 111
 112   // Adds file_ to |reply_context| with the specified |open_flags|.
 113   bool AddFileToReplyContext(
 114       int32_t open_flags,
 115       ppapi::host::ReplyMessageContext* reply_context) const;
 116
 117   BrowserPpapiHostImpl* browser_ppapi_host_;
 118
 119   RenderProcessHost* render_process_host_;
 120   int render_process_id_;
 121   base::ProcessId resolved_render_process_id_;
 122
 123   base::PlatformFile file_;
 124   int32_t open_flags_;
 125
 126   // The file system type specified in the Open() call. This will be
 127   // PP_FILESYSTEMTYPE_INVALID before open was called. This value does not
 128   // indicate that the open command actually succeeded.
 129   PP_FileSystemType file_system_type_;
 130   base::WeakPtr<PepperFileSystemBrowserHost> file_system_host_;
 131
 132   // Valid only for PP_FILESYSTEMTYPE_LOCAL{PERSISTENT,TEMPORARY}.
 133   scoped_refptr<fileapi::FileSystemContext> file_system_context_;
 134   fileapi::FileSystemURL file_system_url_;
 135   base::Closure on_close_callback_;
 136   int64_t max_written_offset_;
 137   bool check_quota_;
 138
 139   ppapi::FileIOStateManager state_manager_;
 140
 141   scoped_refptr<base::MessageLoopProxy> file_message_loop_;
 142
 143   base::WeakPtrFactory<PepperFileIOHost> weak_factory_;
 144
 145   DISALLOW_COPY_AND_ASSIGN(PepperFileIOHost);
 146 };
 147
 148 }  // namespace content
 149
 150 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_FILE_IO_HOST_H_