SyncFS: Support resolveLocalFileSystemURL on SyncFileSystem

webkit/browser/fileapi/file_system_context.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_BROWSER_FILEAPI_FILE_SYSTEM_CONTEXT_H_
 #define WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_CONTEXT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 31 matching lines @@
 class FileStreamReader;
 }
 
 namespace fileapi {
 
 class AsyncFileUtil;
 class CopyOrMoveFileValidatorFactory;
 class ExternalFileSystemBackend;
 class ExternalMountPoints;
 class FileStreamWriter;
+class FileSystemBackend;
 class FileSystemFileUtil;
-class FileSystemBackend;
 class FileSystemOperation;
 class FileSystemOperationRunner;
 class FileSystemOptions;
 class FileSystemQuotaUtil;
 class FileSystemURL;
 class IsolatedFileSystemBackend;
 class MountPoints;
 class SandboxFileSystemBackend;
 
 struct DefaultContextDeleter;
+struct FileSystemInfo;
 
 // This class keeps and provides a file system context for FileSystem API.
 // An instance of this class is created and owned by profile.
 class WEBKIT_STORAGE_BROWSER_EXPORT FileSystemContext
     : public base::RefCountedThreadSafe<FileSystemContext,
                                         DefaultContextDeleter> {
  public:
   // Returns file permission policy we should apply for the given |type|.
   // The return value must be bitwise-or'd of FilePermissionPolicy.
   //
@@ skipping 73 matching lines @@
   // Returns a FileSystemBackend instance for external filesystem
   // type, which is used only by chromeos for now.  This is equivalent to
   // calling GetFileSystemBackend(kFileSystemTypeExternal).
   ExternalFileSystemBackend* external_backend() const;
 
   // Used for OpenFileSystem.
   typedef base::Callback<void(base::PlatformFileError result,
                               const std::string& name,
                               const GURL& root)> OpenFileSystemCallback;
 
+  // Used for ResolveURL.
+  typedef base::Callback<void(base::PlatformFileError result,
+                              const FileSystemInfo& info,
+                              const base::FilePath& file_path,
+                              bool is_directory)> ResolveURLCallback;
+
   // Used for DeleteFileSystem.
   typedef base::Callback<void(base::PlatformFileError result)>
       DeleteFileSystemCallback;
 
   // Opens the filesystem for the given |origin_url| and |type|, and dispatches
   // |callback| on completion.
   // If |create| is true this may actually set up a filesystem instance
   // (e.g. by creating the root directory or initializing the database
   // entry etc).
   void OpenFileSystem(
       const GURL& origin_url,
       FileSystemType type,
       OpenFileSystemMode mode,
       const OpenFileSystemCallback& callback);
 
+  // Opens the filesystem for the given |url| as read-only, and then checks the
+  // existence of the file entry referred by the URL. This should be called on
+  // the IO thread.
+  void ResolveURL(
+      const FileSystemURL& url,
+      const ResolveURLCallback& callback);
+
   // Deletes the filesystem for the given |origin_url| and |type|. This should
-  // be called on the IO Thread.
+  // be called on the IO thread.
   void DeleteFileSystem(
       const GURL& origin_url,
       FileSystemType type,
       const DeleteFileSystemCallback& callback);
 
   // Creates new FileStreamReader instance to read a file pointed by the given
   // filesystem URL |url| starting from |offset|. |expected_modification_time|
   // specifies the expected last modification if the value is non-null, the
   // reader will check the underlying file's actual modification time to see if
   // the file has been modified, and if it does any succeeding read operations
@@ skipping 83 matching lines @@
   // FileSystemURL.
   //
   // If the original url does not point to an isolated or external filesystem,
   // returns the original url, without attempting to crack it.
   FileSystemURL CrackFileSystemURL(const FileSystemURL& url) const;
 
   // For initial backend_map construction. This must be called only from
   // the constructor.
   void RegisterBackend(FileSystemBackend* backend);
 
+  void DidOpenFileSystemForResolveURL(
+      const FileSystemURL& url,
+      const ResolveURLCallback& callback,
+      const GURL& filesystem_root,
+      const std::string& filesystem_name,
+      base::PlatformFileError error);
+
   // Returns a FileSystemBackend, used only by test code.
   SandboxFileSystemBackend* sandbox_backend() const {
     return sandbox_backend_.get();
   }
 
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
   scoped_refptr<base::SequencedTaskRunner> default_file_task_runner_;
 
   scoped_refptr<quota::QuotaManagerProxy> quota_manager_proxy_;
 
@@ skipping 34 matching lines @@
 
 struct DefaultContextDeleter {
   static void Destruct(const FileSystemContext* context) {
     context->DeleteOnCorrectThread();
   }
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_CONTEXT_H_