Support file system access in DevTools with isolated file system.

chrome/browser/devtools/devtools_file_helper.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_DEVTOOLS_DEVTOOLS_FILE_HELPER_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_FILE_HELPER_H_
 
 #include <map>
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 
 class FilePath;
 class Profile;
 
+namespace content {
+class WebContents;
+}
+
 class DevToolsFileHelper {
  public:
-  explicit DevToolsFileHelper(Profile* profile);
+  struct FileSystem {
+    FileSystem();
+    FileSystem(const std::string& file_system_name,
+               const std::string& root_url,
+               const std::string& file_system_path);
+
+    std::string file_system_name;
+    std::string root_url;
+    std::string file_system_path;
+  };
+
+  DevToolsFileHelper(content::WebContents* web_contents, Profile* profile);
   ~DevToolsFileHelper();
 
   typedef base::Callback<void(void)> SaveCallback;
   typedef base::Callback<void(void)> AppendCallback;
+  typedef base::Callback<
+      void(const std::vector<DevToolsFileHelper::FileSystem>&)>
+      RequestFileSystemsCallback;
+  typedef base::Callback<
+      void(std::string, const DevToolsFileHelper::FileSystem&)>
+      AddFileSystemCallback;
 
   // Saves |content| to the file and associates its path with given |url|.
   // If client is calling this method with given |url| for the first time
   // or |save_as| is true, confirmation dialog is shown to the user.
   void Save(const std::string& url,
             const std::string& content,
             bool save_as,
             const SaveCallback& callback);
 
   // Append |content| to the file that has been associated with given |url|.
   // The |url| can be associated with a file via calling Save method.
   // If the Save method has not been called for this |url|, then
   // Append method does nothing.
   void Append(const std::string& url,
               const std::string& content,
               const AppendCallback& callback);
 
+  // Shows select folder dialog.
+  // If user cancels folder selection, passes empty FileSystem struct to
+  // |callback|.
+  // If selected folder contains magic file, grants renderer read/write
+  // permissions, registers isolated file system for it and passes FileSystem
+  // struct to |callback|. Saves file system path to prefs.
+  // If selected folder does not contain magic file, passes error string to
+  // |callback|.
+  void AddFileSystem(const AddFileSystemCallback& callback);
+
+  // Loads file system paths from prefs, grants permissions and registers
+  // isolated file system for those of them that contain magic file and passes
+  // FileSystem structs for registered file systems to |callback|.
+  void RequestFileSystems(const RequestFileSystemsCallback& callback);
+
+  // Removes isolated file system for given |file_system_path|.
+  void RemoveFileSystem(const std::string& file_system_path);
+
  private:
   void SaveAsFileSelected(const std::string& url,
-                    const std::string& content,
-                    const SaveCallback& callback,
-                    const FilePath& path);
+                          const std::string& content,
+                          const SaveCallback& callback,
+                          const FilePath& path);
   void SaveAsFileSelectionCanceled();
+  void InnerAddFileSystem(const AddFileSystemCallback& callback,
+                          const FilePath& path);
+  void AddValidatedFileSystem(const AddFileSystemCallback& callback,
+                              const std::vector<FilePath>& permitted_paths);
+  void RestoreValidatedFileSystems(const RequestFileSystemsCallback& callback,
+                                   const std::vector<FilePath>& file_paths);
 
+  content::WebContents* web_contents_;
   Profile* profile_;
   base::WeakPtrFactory<DevToolsFileHelper> weak_factory_;
   typedef std::map<std::string, FilePath> PathsMap;
   PathsMap saved_files_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsFileHelper);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_FILE_HELPER_H_