Enables internal filesystem types via Isolated filesystems

webkit/fileapi/isolated_file_util.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 WEBKIT_FILEAPI_ISOLATED_FILE_UTIL_H_
 #define WEBKIT_FILEAPI_ISOLATED_FILE_UTIL_H_
 
-#include "base/file_path.h"
-#include "base/file_util_proxy.h"
-#include "base/platform_file.h"
 #include "webkit/fileapi/fileapi_export.h"
-#include "webkit/fileapi/file_system_file_util.h"
-
-namespace base {
-class Time;
-}
+#include "webkit/fileapi/local_file_util.h"
 
 namespace fileapi {
 
 class FileSystemOperationContext;
-class IsolatedContext;
 
-class FILEAPI_EXPORT_PRIVATE IsolatedFileUtil : public FileSystemFileUtil {
+class FILEAPI_EXPORT_PRIVATE IsolatedFileUtil : public LocalFileUtil {
  public:
   IsolatedFileUtil();
   virtual ~IsolatedFileUtil() {}
 
+  // LocalFileUtil overrides.
+  virtual PlatformFileError GetLocalFilePath(
+      FileSystemOperationContext* context,
+      const FileSystemURL& file_system_url,
+      FilePath* local_file_path) OVERRIDE;
+};
+
+// Dragged file system is a specialized IsolatedFileUtil where read access to
+// the virtual root directory (i.e. empty cracked path case) is allowed
+// and single isolated context may be associated with multiple file paths.
+class FILEAPI_EXPORT_PRIVATE DraggedFileUtil : public IsolatedFileUtil {
+ public:
+  DraggedFileUtil();
+  virtual ~DraggedFileUtil() {}
+
   // FileSystemFileUtil overrides.
-  virtual base::PlatformFileError CreateOrOpen(
-      FileSystemOperationContext* context,
-      const FileSystemURL& url,
-      int file_flags,
-      base::PlatformFile* file_handle,
-      bool* created) OVERRIDE;
-  virtual base::PlatformFileError Close(
-      FileSystemOperationContext* context,
-      base::PlatformFile file) OVERRIDE;
-  virtual base::PlatformFileError EnsureFileExists(
-      FileSystemOperationContext* context,
-      const FileSystemURL& url, bool* created) OVERRIDE;
-  virtual base::PlatformFileError CreateDirectory(
-      FileSystemOperationContext* context,
-      const FileSystemURL& url,
-      bool exclusive,
-      bool recursive) OVERRIDE;
   virtual base::PlatformFileError GetFileInfo(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       base::PlatformFileInfo* file_info,
       FilePath* platform_path) OVERRIDE;
   virtual AbstractFileEnumerator* CreateFileEnumerator(
       FileSystemOperationContext* context,
       const FileSystemURL& root_url,
       bool recursive) OVERRIDE;
-  virtual PlatformFileError GetLocalFilePath(
-      FileSystemOperationContext* context,
-      const FileSystemURL& file_system_url,
-      FilePath* local_file_path) OVERRIDE;
-  virtual base::PlatformFileError Touch(
-      FileSystemOperationContext* context,
-      const FileSystemURL& url,
-      const base::Time& last_access_time,
-      const base::Time& last_modified_time) OVERRIDE;
-  virtual base::PlatformFileError Truncate(
-      FileSystemOperationContext* context,
-      const FileSystemURL& url,
-      int64 length) OVERRIDE;
   virtual bool PathExists(
       FileSystemOperationContext* context,
       const FileSystemURL& url) OVERRIDE;
   virtual bool DirectoryExists(
       FileSystemOperationContext* context,
       const FileSystemURL& url) OVERRIDE;
   virtual bool IsDirectoryEmpty(
       FileSystemOperationContext* context,
       const FileSystemURL& url) OVERRIDE;
-  virtual base::PlatformFileError CopyOrMoveFile(
-      FileSystemOperationContext* context,
-      const FileSystemURL& src_url,
-      const FileSystemURL& dest_url,
-      bool copy) OVERRIDE;
-  virtual base::PlatformFileError CopyInForeignFile(
-        FileSystemOperationContext* context,
-        const FilePath& src_file_path,
-        const FileSystemURL& dest_url) OVERRIDE;
-  virtual base::PlatformFileError DeleteFile(
-      FileSystemOperationContext* context,
-      const FileSystemURL& url) OVERRIDE;
-  virtual base::PlatformFileError DeleteSingleDirectory(
-      FileSystemOperationContext* context,
-      const FileSystemURL& url) OVERRIDE;
-  virtual scoped_refptr<webkit_blob::ShareableFileReference>
-      CreateSnapshotFile(FileSystemOperationContext* context,
-                         const FileSystemURL& url,
-                         base::PlatformFileError* result,
-                         base::PlatformFileInfo* file_info,
-                         FilePath* platform_path) OVERRIDE;
 
  private:
-  // Returns false if the given |url| is not a valid path.
-  bool GetPlatformPath(const FileSystemURL& url,
-                       FilePath* platform_path) const;
-  DISALLOW_COPY_AND_ASSIGN(IsolatedFileUtil);
+  DISALLOW_COPY_AND_ASSIGN(DraggedFileUtil);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_ISOLATED_FILE_UTIL_H_