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 CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_OBJECT_ENUMERATOR_H_ 6 #define CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_OBJECT_ENUMERATOR_H_ 7 8 #include <vector> 9 10 #include "base/files/file_path.h" 11 #include "base/time/time.h" 12 #include "device/media_transfer_protocol/mtp_file_entry.pb.h" 13 #include "webkit/browser/fileapi/file_system_file_util.h" 14 15 namespace chrome { 16 17 // Used to enumerate top-level files of an media file system. 18 class MTPDeviceObjectEnumerator 19 : public fileapi::FileSystemFileUtil::AbstractFileEnumerator { 20 public: 21 explicit MTPDeviceObjectEnumerator(const std::vector<MtpFileEntry>& entries); 22 23 virtual ~MTPDeviceObjectEnumerator(); 24 25 // AbstractFileEnumerator: 26 virtual base::FilePath Next() OVERRIDE; 27 virtual int64 Size() OVERRIDE; 28 virtual bool IsDirectory() OVERRIDE; 29 virtual base::Time LastModifiedTime() OVERRIDE; 30 31 // If the current file entry is valid, returns true and fills in |entry_id| 32 // with the entry identifier else returns false and |entry_id| is not set. 33 bool GetEntryId(uint32_t* entry_id) const; 34 35 private: 36 // Returns true if the enumerator has more entries to traverse, false 37 // otherwise. 38 bool HasMoreEntries() const; 39 40 // Returns true if Next() has been called at least once, and the enumerator 41 // has more entries to traverse. 42 bool IsIndexReadyAndInRange() const; 43 44 // List of directory file entries information. 45 const std::vector<MtpFileEntry> file_entries_; 46 47 // Index into |file_entries_|. 48 // Should only be used when |is_index_ready_| is true. 49 size_t index_; 50 51 // Initially false. Set to true after Next() has been called. 52 bool is_index_ready_; 53 54 DISALLOW_COPY_AND_ASSIGN(MTPDeviceObjectEnumerator); 55 }; 56 57 } // namespace chrome 58 59 #endif // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_OBJECT_ENUMERATOR_H_ 60
