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chrome/browser/extensions/api/file_handlers/directory_util.cc

-// Copyright 2016 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/extensions/api/file_handlers/directory_util.h"
-
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "chrome/browser/profiles/profile.h"
-#include "content/public/browser/browser_thread.h"
-#include "net/base/filename_util.h"
-#include "storage/browser/fileapi/file_system_url.h"
-
-#if defined(OS_CHROMEOS)
-#include "extensions/browser/api/extensions_api_client.h"
-#include "extensions/browser/api/file_handlers/non_native_file_system_delegate.h"
-#endif
-
-namespace extensions {
-namespace app_file_handler_util {
-
-namespace {
-
-void GetIsDirectoryFromFileInfo(const base::FilePath& path,
-                                bool* is_directory) {
-  base::File::Info file_info;
-  *is_directory = GetFileInfo(path, &file_info) && file_info.is_directory;
-}
-
-void OnGetIsDirectoryFromFileInfoCompleted(
-    std::unique_ptr<bool> is_directory,
-    const base::Callback<void(bool)>& callback) {
-  callback.Run(*is_directory);
-}
-
-// The callback parameter contains the result and is required to support
-// both native local directories to avoid UI thread and non native local
-// path directories for the IsNonNativeLocalPathDirectory API.
-void EntryIsDirectory(Profile* profile,
-                      const base::FilePath& path,
-                      const base::Callback<void(bool)>& callback) {
-#if defined(OS_CHROMEOS)
-  NonNativeFileSystemDelegate* delegate =
-      ExtensionsAPIClient::Get()->GetNonNativeFileSystemDelegate();
-  if (delegate && delegate->IsUnderNonNativeLocalPath(profile, path)) {
-    delegate->IsNonNativeLocalPathDirectory(profile, path, callback);
-    return;
-  }
-#endif
-
-  std::unique_ptr<bool> is_directory(new bool);
-  bool* const is_directory_ptr = is_directory.get();
-
-  content::BrowserThread::PostBlockingPoolTaskAndReply(
-      FROM_HERE,
-      base::Bind(&GetIsDirectoryFromFileInfo, path, is_directory_ptr),
-      base::Bind(&OnGetIsDirectoryFromFileInfoCompleted,
-                 base::Passed(&is_directory), callback));
-}
-
-}  // namespace
-
-IsDirectoryCollector::IsDirectoryCollector(Profile* profile)
-    : profile_(profile), left_(0), weak_ptr_factory_(this) {}
-
-IsDirectoryCollector::~IsDirectoryCollector() {}
-
-void IsDirectoryCollector::CollectForEntriesPaths(
-    const std::vector<base::FilePath>& paths,
-    const CompletionCallback& callback) {
-  DCHECK(!callback.is_null());
-  paths_ = paths;
-  callback_ = callback;
-
-  DCHECK(!result_.get());
-  result_.reset(new std::set<base::FilePath>());
-  left_ = paths.size();
-
-  if (!left_) {
-    // Nothing to process.
-    base::ThreadTaskRunnerHandle::Get()->PostTask(
-        FROM_HERE, base::Bind(callback_, base::Passed(&result_)));
-    callback_ = CompletionCallback();
-    return;
-  }
-
-  for (size_t i = 0; i < paths.size(); ++i) {
-    EntryIsDirectory(profile_, paths[i],
-                     base::Bind(&IsDirectoryCollector::OnIsDirectoryCollected,
-                                weak_ptr_factory_.GetWeakPtr(), i));
-  }
-}
-
-void IsDirectoryCollector::OnIsDirectoryCollected(size_t index,
-                                                  bool is_directory) {
-  if (is_directory)
-    result_->insert(paths_[index]);
-  if (!--left_) {
-    base::ThreadTaskRunnerHandle::Get()->PostTask(
-        FROM_HERE, base::Bind(callback_, base::Passed(&result_)));
-    // Release the callback to avoid a circullar reference in case an instance
-    // of this class is a member of a ref counted class, which instance is bound
-    // to this callback.
-    callback_ = CompletionCallback();
-  }
-}
-
-}  // namespace app_file_handler_util
-}  // namespace extensions