[fsp] Add support for copying files within a provided file system.

chrome/browser/chromeos/file_system_provider/fileapi/provider_async_file_util.cc

 // Copyright 2014 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/chromeos/file_system_provider/fileapi/provider_async_file_util.h"
 
 #include "base/callback.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 141 matching lines @@
 
   // If the file already existed, then return success anyway, since it is not
   // an error.
   const base::File::Error error =
       result == base::File::FILE_ERROR_EXISTS ? base::File::FILE_OK : result;
 
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE, base::Bind(callback, error, created));
 }
 
+// Executes CopyEntry on the UI thread.
+void CopyEntryOnUIThread(
+    scoped_ptr<fileapi::FileSystemOperationContext> context,
+    const fileapi::FileSystemURL& source_url,
+    const fileapi::FileSystemURL& target_url,
+    const fileapi::AsyncFileUtil::StatusCallback& callback) {
+  util::FileSystemURLParser source_parser(source_url);
+  util::FileSystemURLParser target_parser(target_url);
+
+  if (!source_parser.Parse() || !target_parser.Parse() ||
+      source_parser.file_system() != target_parser.file_system()) {
+    callback.Run(base::File::FILE_ERROR_INVALID_OPERATION);
+    return;
+  }
+
+  target_parser.file_system()->CopyEntry(
+      source_parser.file_path(), target_parser.file_path(), callback);
+}
+
+// Routes the response of CopyEntry to a callback of CopyLocalFile() on the
+// IO thread.
+void OnCopyEntry(const fileapi::AsyncFileUtil::StatusCallback& callback,
+                 base::File::Error result) {
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE, base::Bind(callback, result));
+}
+
 }  // namespace
 
 ProviderAsyncFileUtil::ProviderAsyncFileUtil() {}
 
 ProviderAsyncFileUtil::~ProviderAsyncFileUtil() {}
 
 void ProviderAsyncFileUtil::CreateOrOpen(
     scoped_ptr<fileapi::FileSystemOperationContext> context,
     const fileapi::FileSystemURL& url,
     int file_flags,
@@ skipping 90 matching lines @@
 }
 
 void ProviderAsyncFileUtil::CopyFileLocal(
     scoped_ptr<fileapi::FileSystemOperationContext> context,
     const fileapi::FileSystemURL& src_url,
     const fileapi::FileSystemURL& dest_url,
     CopyOrMoveOption option,
     const CopyFileProgressCallback& progress_callback,
     const StatusCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  callback.Run(base::File::FILE_ERROR_ACCESS_DENIED);
+  // TODO(mtomasz): Consier adding support for options (preserving last modified
+  // time) as well as the progress callback.
+  BrowserThread::PostTask(BrowserThread::UI,
+                          FROM_HERE,
+                          base::Bind(&CopyEntryOnUIThread,
+                                     base::Passed(&context),
+                                     src_url,
+                                     dest_url,
+                                     base::Bind(&OnCopyEntry, callback)));
 }
 
 void ProviderAsyncFileUtil::MoveFileLocal(
     scoped_ptr<fileapi::FileSystemOperationContext> context,
     const fileapi::FileSystemURL& src_url,
     const fileapi::FileSystemURL& dest_url,
     CopyOrMoveOption option,
     const StatusCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   callback.Run(base::File::FILE_ERROR_ACCESS_DENIED);
@@ skipping 58 matching lines @@
   NOTIMPLEMENTED();
   callback.Run(base::File::FILE_ERROR_INVALID_OPERATION,
                base::File::Info(),
                base::FilePath(),
                scoped_refptr<webkit_blob::ShareableFileReference>());
 }
 
 }  // namespace internal
 }  // namespace file_system_provider
 }  // namespace chromeos