Implement DeleteFile and DeleteDirectory.

chrome/browser/media_galleries/linux/mtp_device_delegate_impl_linux.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_DELEGATE_IMPL_LINUX_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_DELEGATE_IMPL_LINUX_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 46 matching lines @@
   };
 
   class MTPFileNode;
 
   // Maps file ids to file nodes.
   typedef std::map<uint32, MTPFileNode*> FileIdToMTPFileNodeMap;
 
   // Maps file paths to file info.
   typedef std::map<base::FilePath, storage::DirectoryEntry> FileInfoCache;
 
+  typedef base::Closure DeleteObjectSuccessCallback;
+
   // Should only be called by CreateMTPDeviceAsyncDelegate() factory call.
   // Defer the device initializations until the first file operation request.
   // Do all the initializations in EnsureInitAndRunTask() function.
   MTPDeviceDelegateImplLinux(const std::string& device_location,
                              const bool read_only);
 
   // Destructed via CancelPendingTasksAndDeleteDelegate().
   ~MTPDeviceDelegateImplLinux() override;
 
   // MTPDeviceAsyncDelegate:
   void GetFileInfo(const base::FilePath& file_path,
                    const GetFileInfoSuccessCallback& success_callback,
                    const ErrorCallback& error_callback) override;
   void ReadDirectory(const base::FilePath& root,
                      const ReadDirectorySuccessCallback& success_callback,
                      const ErrorCallback& error_callback) override;
   void CreateSnapshotFile(
       const base::FilePath& device_file_path,
       const base::FilePath& local_path,
       const CreateSnapshotFileSuccessCallback& success_callback,
       const ErrorCallback& error_callback) override;
   bool IsStreaming() override;
   void ReadBytes(const base::FilePath& device_file_path,
                  const scoped_refptr<net::IOBuffer>& buf,
                  int64 offset,
                  int buf_len,
                  const ReadBytesSuccessCallback& success_callback,
                  const ErrorCallback& error_callback) override;
-  bool IsReadOnly() override;
+  bool IsReadOnly() const override;
   void CopyFileFromLocal(
       const base::FilePath& source_file_path,
       const base::FilePath& device_file_path,
       const CopyFileFromLocalSuccessCallback& success_callback,
       const ErrorCallback& error_callback) override;
+  void DeleteFile(const base::FilePath& file_path,
+                  const DeleteFileSuccessCallback& success_callback,
+                  const ErrorCallback& error_callback) override;
+  void DeleteDirectory(const base::FilePath& file_path,
+                       const DeleteDirectorySuccessCallback& success_callback,
+                       const ErrorCallback& error_callback) override;
   void CancelPendingTasksAndDeleteDelegate() override;
 
   // The internal methods correspond to the similarly named methods above.
   // The |root_node_| cache should be filled at this point.
   virtual void GetFileInfoInternal(
       const base::FilePath& file_path,
       const GetFileInfoSuccessCallback& success_callback,
       const ErrorCallback& error_callback);
   virtual void ReadDirectoryInternal(
       const base::FilePath& root,
       const ReadDirectorySuccessCallback& success_callback,
       const ErrorCallback& error_callback);
   virtual void CreateSnapshotFileInternal(
       const base::FilePath& device_file_path,
       const base::FilePath& local_path,
       const CreateSnapshotFileSuccessCallback& success_callback,
       const ErrorCallback& error_callback);
   virtual void ReadBytesInternal(
       const base::FilePath& device_file_path,
       net::IOBuffer* buf, int64 offset, int buf_len,
       const ReadBytesSuccessCallback& success_callback,
       const ErrorCallback& error_callback);
   virtual void CopyFileFromLocalInternal(
       const base::FilePath& device_file_path,
       const CopyFileFromLocalSuccessCallback& success_callback,
       const ErrorCallback& error_callback,
       const int source_file_descriptor);
+  virtual void DeleteFileInternal(
+      const base::FilePath& file_path,
+      const DeleteFileSuccessCallback& success_callback,
+      const ErrorCallback& error_callback,
+      const base::File::Info& file_info);
+  virtual void DeleteDirectoryInternal(
+      const base::FilePath& file_path,
+      const DeleteDirectorySuccessCallback& success_callback,
+      const ErrorCallback& error_callback,
+      const base::File::Info& file_info);
+
+  // Called when ReadDirectory succeeds.
+  virtual void OnDidReadDirectoryToDeleteDirectory(
+      const uint32 directory_id,
+      const DeleteDirectorySuccessCallback& success_callback,
+      const ErrorCallback& error_callback,
+      const storage::AsyncFileUtil::EntryList& entries,
+      const bool has_more);
+
+  // Calls DeleteObjectOnUIThread on UI thread.
+  virtual void RunDeleteObjectOnUIThread(
+      const uint32 object_id,
+      const DeleteObjectSuccessCallback& success_callback,
+      const ErrorCallback& error_callback);
 
   // Ensures the device is initialized for communication.
   // If the device is already initialized, call RunTask().
   //
   // If the device is uninitialized, store the |task_info| in a pending task
   // queue and runs the pending tasks in the queue once the device is
   // successfully initialized.
   void EnsureInitAndRunTask(const PendingTaskInfo& task_info);
 
   // Runs a task. If |task_info.path| is empty, or if the path is cached, runs
@@ skipping 100 matching lines @@
   // Called when CopyFileFromLocal() succeeds.
   void OnDidCopyFileFromLocal(
       const CopyFileFromLocalSuccessCallback& success_callback,
       const int source_file_descriptor);
 
   // Called when CopyFileFromLocal() fails.
   void HandleCopyFileFromLocalError(const ErrorCallback& error_callback,
                                     const int source_file_descriptor,
                                     base::File::Error error);
 
+  // Called when DeleteObject() succeeds.
+  void OnDidDeleteObject(const uint32 object_id,
+                         const DeleteObjectSuccessCallback success_callback);
+
+  // Called when DeleteFileOrDirectory() fails.
+  void HandleDeleteFileOrDirectoryError(const ErrorCallback& error_callback,
+                                        base::File::Error error);
+
   // Handles the device file |error| while operating on |file_id|.
   // |error_callback| is invoked to notify the caller about the file error.
   void HandleDeviceFileError(const ErrorCallback& error_callback,
                              uint32 file_id,
                              base::File::Error error);
 
   // Given a full path, returns a non-empty sub-path that needs to be read into
   // the cache if such a uncached path exists.
   // |cached_path| is the portion of |path| that has had cache lookup attempts.
   base::FilePath NextUncachedPathComponent(
       const base::FilePath& path,
       const base::FilePath& cached_path) const;
 
   // Fills the file cache using the results from NextUncachedPathComponent().
   void FillFileCache(const base::FilePath& uncached_path);
 
   // Given a full path, if it exists in the cache, writes the file's id to |id|
   // and return true.
   bool CachedPathToId(const base::FilePath& path, uint32* id) const;
 
+  // Evict the cache of |id|.
+  void EvictCachedPathToId(const uint32 id);
+
   // MTP device initialization state.
   InitializationState init_state_;
 
   // Used to make sure only one task is in progress at any time.
   // Otherwise the browser will try to send too many requests at once and
   // overload the device.
   bool task_in_progress_;
 
   // Registered file system device path. This path does not
   // correspond to a real device path (e.g. "/usb:2,2:81282").
@@ skipping 34 matching lines @@
   // the ReadDirectory operation.
   FileInfoCache file_info_cache_;
 
   // For callbacks that may run after destruction.
   base::WeakPtrFactory<MTPDeviceDelegateImplLinux> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MTPDeviceDelegateImplLinux);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_DELEGATE_IMPL_LINUX_H_