1 // Copyright (c) 2012 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_PPB_FILE_REF_IMPL_H_ 6 #define CONTENT_RENDERER_PEPPER_PPB_FILE_REF_IMPL_H_ 7 8 #include <string> 9 #include <vector> 10 11 #include "base/callback_forward.h" 12 #include "base/files/file_path.h" 13 #include "base/id_map.h" 14 #include "base/memory/linked_ptr.h" 15 #include "base/platform_file.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/ppb_file_ref.h" 20 #include "ppapi/shared_impl/ppb_file_ref_shared.h" 21 #include "ppapi/shared_impl/scoped_pp_resource.h" 22 #include "ppapi/shared_impl/var.h" 23 #include "url/gurl.h" 24 25 namespace ppapi { 26 namespace host { 27 class ResourceHost; 28 } 29 } 30 31 namespace content { 32 33 using ppapi::StringVar; 34 35 class PepperFileSystemHost; 36 37 class PPB_FileRef_Impl : public ppapi::PPB_FileRef_Shared, 38 public IPC::Listener { 39 public: 40 PPB_FileRef_Impl(const ppapi::PPB_FileRef_CreateInfo& info, 41 PP_Resource file_system); 42 PPB_FileRef_Impl(const ppapi::PPB_FileRef_CreateInfo& info, 43 const base::FilePath& external_file_path); 44 45 // The returned object will have a refcount of 0 (just like "new"). 46 static PPB_FileRef_Impl* CreateInternal(PP_Instance instance, 47 PP_Resource pp_file_system, 48 const std::string& path); 49 50 // The returned object will have a refcount of 0 (just like "new"). 51 static PPB_FileRef_Impl* CreateExternal( 52 PP_Instance instance, 53 const base::FilePath& external_file_path, 54 const std::string& display_name); 55 56 // PPB_FileRef_API implementation (not provided by PPB_FileRef_Shared). 57 virtual PP_Resource GetParent() OVERRIDE; 58 virtual int32_t MakeDirectory( 59 PP_Bool make_ancestors, 60 scoped_refptr<ppapi::TrackedCallback> callback) OVERRIDE; 61 virtual int32_t Touch( 62 PP_Time last_access_time, 63 PP_Time last_modified_time, 64 scoped_refptr<ppapi::TrackedCallback> callback) OVERRIDE; 65 virtual int32_t Delete( 66 scoped_refptr<ppapi::TrackedCallback> callback) OVERRIDE; 67 virtual int32_t Rename( 68 PP_Resource new_file_ref, 69 scoped_refptr<ppapi::TrackedCallback> callback) OVERRIDE; 70 virtual int32_t Query( 71 PP_FileInfo* info, 72 scoped_refptr<ppapi::TrackedCallback> callback) OVERRIDE; 73 virtual int32_t ReadDirectoryEntries( 74 const PP_ArrayOutput& output, 75 scoped_refptr<ppapi::TrackedCallback> callback) OVERRIDE; 76 virtual int32_t QueryInHost( 77 linked_ptr<PP_FileInfo> info, 78 scoped_refptr<ppapi::TrackedCallback> callback) OVERRIDE; 79 virtual int32_t ReadDirectoryEntriesInHost( 80 linked_ptr<std::vector<ppapi::PPB_FileRef_CreateInfo> > files, 81 linked_ptr<std::vector<PP_FileType> > file_types, 82 scoped_refptr<ppapi::TrackedCallback> callback) OVERRIDE; 83 virtual PP_Var GetAbsolutePath() OVERRIDE; 84 85 PP_Resource file_system_resource() const { return file_system_; } 86 87 // Returns the system path corresponding to this file. Valid only for 88 // external filesystems. 89 base::FilePath GetSystemPath() const; 90 91 // Returns the FileSystem API URL corresponding to this file. 92 GURL GetFileSystemURL() const; 93 94 // Checks if file ref has file system instance and if the instance is opened. 95 bool HasValidFileSystem() const; 96 97 void AddFileSystemRefCount() { 98 file_system_ref_ = file_system_; 99 } 100 101 private: 102 virtual ~PPB_FileRef_Impl(); 103 104 // IPC::Listener implementation. 105 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 106 107 void OnAsyncFileOpened( 108 base::PlatformFileError error_code, 109 IPC::PlatformFileForTransit file_for_transit, 110 int message_id); 111 112 // Many mutation functions are allow only to non-external filesystems, This 113 // function returns true if the filesystem is opened and isn't external as an 114 // access check for these functions. 115 bool IsValidNonExternalFileSystem() const; 116 117 PepperFileSystemHost* GetFileSystemHost() const; 118 static PepperFileSystemHost* GetFileSystemHostInternal( 119 PP_Instance instance, PP_Resource resource); 120 121 // 0 for external filesystems. This is a plugin side resource that we don't 122 // hold a reference here, so file_system_ could be destroyed earlier than 123 // this object. Right now we checked the existance in plugin delegate before 124 // use. But it's better to hold a reference once we migrate FileRef to the 125 // new design. 126 PP_Resource file_system_; 127 128 // Holds a reference of FileSystem when running in process. See 129 // PPB_FileRef_Proxy for corresponding code for out-of-process mode. Note 130 // that this ScopedPPResource is only expected to be used when running in 131 // process (since PPB_FileRef_Proxy takes care of out-of-process case). 132 // Also note that this workaround will be no longer needed after FileRef 133 // refactoring. 134 ppapi::ScopedPPResource file_system_ref_; 135 136 // Used only for external filesystems. 137 base::FilePath external_file_system_path_; 138 139 // Lazily initialized var created from the external path. This is so we can 140 // return the identical string object every time it is requested. 141 scoped_refptr<StringVar> external_path_var_; 142 143 int routing_id_; 144 145 typedef base::Callback<void (base::PlatformFileError, base::PassPlatformFile)> 146 AsyncOpenFileCallback; 147 148 IDMap<AsyncOpenFileCallback> pending_async_open_files_; 149 150 DISALLOW_COPY_AND_ASSIGN(PPB_FileRef_Impl); 151 }; 152 153 } // namespace content 154 155 #endif // CONTENT_RENDERER_PEPPER_PPB_FILE_REF_IMPL_H_ 156
