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// CRX filesystem is a filesystem that allows an extension to read its own
6// package directory tree.  See ppapi/examples/crxfs for example.
7//
8// IMPLEMENTATION
9//
10// The implementation involves both browser and renderer.  In order to provide
11// readonly access to CRX filesystem (i.e. extension directory), we create an
12// "isolated filesystem" pointing to current extension directory in browser.
13// Then browser grants read permission to renderer, and tells plugin the
14// filesystem id, or fsid.
15//
16// Once the plugin receives the fsid, it creates a PPB_FileSystem and forwards
17// the fsid to PepperFileSystemHost in order to construct root url.
18
19#ifndef PPAPI_PROXY_ISOLATED_FILE_SYSTEM_PRIVATE_RESOURCE_H_
20#define PPAPI_PROXY_ISOLATED_FILE_SYSTEM_PRIVATE_RESOURCE_H_
21
22#include <string>
23
24#include "base/memory/ref_counted.h"
25#include "ppapi/proxy/connection.h"
26#include "ppapi/proxy/plugin_resource.h"
27#include "ppapi/proxy/ppapi_proxy_export.h"
28#include "ppapi/thunk/ppb_isolated_file_system_private_api.h"
29
30namespace ppapi {
31
32class TrackedCallback;
33
34namespace proxy {
35
36class ResourceMessageReplyParams;
37
38class PPAPI_PROXY_EXPORT IsolatedFileSystemPrivateResource
39    : public PluginResource,
40      public thunk::PPB_IsolatedFileSystem_Private_API {
41 public:
42  IsolatedFileSystemPrivateResource(
43      Connection connection, PP_Instance instance);
44  virtual ~IsolatedFileSystemPrivateResource();
45
46  // Resource overrides.
47  virtual thunk::PPB_IsolatedFileSystem_Private_API*
48      AsPPB_IsolatedFileSystem_Private_API() OVERRIDE;
49
50  // PPB_IsolatedFileSystem_Private_API implementation.
51  virtual int32_t Open(PP_Instance instance,
52                       PP_IsolatedFileSystemType_Private type,
53                       PP_Resource* file_system_resource,
54                       scoped_refptr<TrackedCallback> callback) OVERRIDE;
55
56 private:
57  void OnBrowserOpenComplete(PP_IsolatedFileSystemType_Private type,
58                             PP_Resource* file_system_resource,
59                             scoped_refptr<TrackedCallback> callback,
60                             const ResourceMessageReplyParams& params,
61                             const std::string& fsid);
62
63  DISALLOW_COPY_AND_ASSIGN(IsolatedFileSystemPrivateResource);
64};
65
66}  // namespace proxy
67}  // namespace ppapi
68
69#endif  // PPAPI_PROXY_ISOLATED_FILE_SYSTEM_PRIVATE_RESOURCE_H_
70