Change media galleries to external file system type to add toURL support

chrome/browser/media_galleries/fileapi/itunes_file_util.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/media_galleries/fileapi/itunes_file_util.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 16 matching lines @@
 
 namespace {
 
 base::File::Error MakeDirectoryFileInfo(base::File::Info* file_info) {
   base::File::Info result;
   result.is_directory = true;
   *file_info = result;
   return base::File::FILE_OK;
 }
 
+std::vector<std::string> GetVirtualPathComponents(
+    const fileapi::FileSystemURL& url) {
+  ImportedMediaGalleryRegistry* imported_registry =
+      ImportedMediaGalleryRegistry::GetInstance();
+  base::FilePath root = imported_registry->ImportedRoot().AppendASCII("itunes");
+
+  DCHECK(root.IsParent(url.path()) || root == url.path());
+  base::FilePath virtual_path;
+  root.AppendRelativePath(url.path(), &virtual_path);
+
+  std::vector<std::string> result;
+  fileapi::VirtualPath::GetComponentsUTF8Unsafe(virtual_path, &result);
+  return result;
+}
+
 }  // namespace
 
 const char kITunesLibraryXML[] = "iTunes Music Library.xml";
 const char kITunesMediaDir[] = "iTunes Media";
 const char kITunesMusicDir[] = "Music";
 const char kITunesAutoAddDir[] = "Automatically Add to iTunes";
 
 ITunesFileUtil::ITunesFileUtil(MediaPathFilter* media_path_filter)
     : NativeMediaFileUtil(media_path_filter),
       weak_factory_(this),
@@ skipping 37 matching lines @@
 //   /                                                - root directory
 //   /iTunes Music Library.xml                        - library xml file
 //   /iTunes Media/Automatically Add to iTunes        - auto-import directory
 //   /iTunes Media/Music/<Artist>/<Album>/<Track>     - tracks
 //
 base::File::Error ITunesFileUtil::GetFileInfoSync(
     fileapi::FileSystemOperationContext* context,
     const fileapi::FileSystemURL& url,
     base::File::Info* file_info,
     base::FilePath* platform_path) {
-  std::vector<std::string> components;
-  fileapi::VirtualPath::GetComponentsUTF8Unsafe(url.path(), &components);
+  std::vector<std::string> components = GetVirtualPathComponents(url);
 
   if (components.size() == 0)
     return MakeDirectoryFileInfo(file_info);
 
   if (components.size() == 1 && components[0] == kITunesLibraryXML) {
     // We can't just call NativeMediaFileUtil::GetFileInfoSync() here because it
     // uses the MediaPathFilter. At this point, |library_path_| is known good
     // because GetFileInfoWithFreshDataProvider() gates access to this method.
     base::FilePath file_path = GetDataProvider()->library_path();
     if (platform_path)
@@ skipping 40 matching lines @@
   }
 
   return base::File::FILE_ERROR_NOT_FOUND;
 }
 
 base::File::Error ITunesFileUtil::ReadDirectorySync(
     fileapi::FileSystemOperationContext* context,
     const fileapi::FileSystemURL& url,
     EntryList* file_list) {
   DCHECK(file_list->empty());
-  std::vector<std::string> components;
-  fileapi::VirtualPath::GetComponentsUTF8Unsafe(url.path(), &components);
+  std::vector<std::string> components = GetVirtualPathComponents(url);
 
   if (components.size() == 0) {
     base::File::Info xml_info;
     if (!base::GetFileInfo(GetDataProvider()->library_path(), &xml_info))
       return base::File::FILE_ERROR_IO;
     file_list->push_back(DirectoryEntry(kITunesLibraryXML,
                                         DirectoryEntry::FILE,
                                         xml_info.size, xml_info.last_modified));
     file_list->push_back(DirectoryEntry(kITunesMediaDir,
                                         DirectoryEntry::DIRECTORY,
@@ skipping 89 matching lines @@
     const fileapi::FileSystemURL& url) {
   return base::File::FILE_ERROR_SECURITY;
 }
 
 base::File::Error ITunesFileUtil::CreateSnapshotFileSync(
     fileapi::FileSystemOperationContext* context,
     const fileapi::FileSystemURL& url,
     base::File::Info* file_info,
     base::FilePath* platform_path,
     scoped_refptr<webkit_blob::ShareableFileReference>* file_ref) {
-  DCHECK(!url.path().IsAbsolute());
-  if (url.path() != base::FilePath().AppendASCII(kITunesLibraryXML)) {
+  std::vector<std::string> components = GetVirtualPathComponents(url);
+  if (components.size() != 1 || components[0] != kITunesLibraryXML) {
     return NativeMediaFileUtil::CreateSnapshotFileSync(context, url, file_info,
                                                        platform_path, file_ref);
   }
 
   // The following code is different than
   // NativeMediaFileUtil::CreateSnapshotFileSync in that it knows that the
   // library xml file is not a directory and it doesn't run mime sniffing on the
   // file. The only way to get here is by way of
   // CreateSnapshotFileWithFreshDataProvider() so the file has already been
   // parsed and deemed valid.
   *file_ref = scoped_refptr<webkit_blob::ShareableFileReference>();
   return GetFileInfoSync(context, url, file_info, platform_path);
 }
 
 base::File::Error ITunesFileUtil::GetLocalFilePath(
     fileapi::FileSystemOperationContext* context,
     const fileapi::FileSystemURL& url,
     base::FilePath* local_file_path) {
-  std::vector<std::string> components;
-  fileapi::VirtualPath::GetComponentsUTF8Unsafe(url.path(), &components);
+  std::vector<std::string> components = GetVirtualPathComponents(url);
 
   if (components.size() == 1 && components[0] == kITunesLibraryXML) {
     *local_file_path = GetDataProvider()->library_path();
     return base::File::FILE_OK;
   }
 
   if (components.size() >= 2 && components[0] == kITunesMediaDir &&
       components[1] == kITunesAutoAddDir) {
     *local_file_path = GetDataProvider()->auto_add_path();
     if (local_file_path->empty())
@@ skipping 80 matching lines @@
                                                             callback);
 }
 
 ITunesDataProvider* ITunesFileUtil::GetDataProvider() {
   if (!imported_registry_)
     imported_registry_ = ImportedMediaGalleryRegistry::GetInstance();
   return imported_registry_->ITunesDataProvider();
 }
 
 }  // namespace itunes