Picasa import: Make NativeMediaFileUtil an AsyncFileUtil

chrome/browser/media_galleries/fileapi/filtering_file_enumerator.cc

-// 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.
-
-#include "chrome/browser/media_galleries/fileapi/filtering_file_enumerator.h"
-
-#include "base/files/file_path.h"
-#include "base/logging.h"
-#include "build/build_config.h"
-
-#if defined(OS_WIN)
-#include <windows.h>
-#else
-#include <cstring>
-
-#include "base/string_util.h"
-#endif
-
-namespace chrome {
-
-namespace {
-
-// Used to skip the hidden folders and files. Returns true if the file specified
-// by |path| should be skipped.
-bool ShouldSkip(const base::FilePath& path) {
-  const base::FilePath& base_name = path.BaseName();
-  if (base_name.empty())
-    return false;
-
-  // Dot files (aka hidden files)
-  if (base_name.value()[0] == '.')
-    return true;
-
-  // Mac OS X file.
-  if (base_name.value() == FILE_PATH_LITERAL("__MACOSX"))
-    return true;
-
-#if defined(OS_WIN)
-  DWORD file_attributes = ::GetFileAttributes(path.value().c_str());
-  if ((file_attributes != INVALID_FILE_ATTRIBUTES) &&
-      ((file_attributes & FILE_ATTRIBUTE_HIDDEN) != 0))
-    return true;
-#else
-  // Windows always creates a recycle bin folder in the attached device to store
-  // all the deleted contents. On non-windows operating systems, there is no way
-  // to get the hidden attribute of windows recycle bin folders that are present
-  // on the attached device. Therefore, compare the file path name to the
-  // recycle bin name and exclude those folders. For more details, please refer
-  // to http://support.microsoft.com/kb/171694.
-  const char win_98_recycle_bin_name[] = "RECYCLED";
-  const char win_xp_recycle_bin_name[] = "RECYCLER";
-  const char win_vista_recycle_bin_name[] = "$Recycle.bin";
-  if ((base::strncasecmp(base_name.value().c_str(),
-                         win_98_recycle_bin_name,
-                         strlen(win_98_recycle_bin_name)) == 0) ||
-      (base::strncasecmp(base_name.value().c_str(),
-                         win_xp_recycle_bin_name,
-                         strlen(win_xp_recycle_bin_name)) == 0) ||
-      (base::strncasecmp(base_name.value().c_str(),
-                         win_vista_recycle_bin_name,
-                         strlen(win_vista_recycle_bin_name)) == 0))
-    return true;
-#endif
-  return false;
-}
-
-}  // namespace
-
-FilteringFileEnumerator::FilteringFileEnumerator(
-    scoped_ptr<fileapi::FileSystemFileUtil::AbstractFileEnumerator>
-        base_enumerator,
-    MediaPathFilter* filter)
-    : base_enumerator_(base_enumerator.Pass()),
-      filter_(filter) {
-  DCHECK(base_enumerator_.get());
-  DCHECK(filter);
-}
-
-FilteringFileEnumerator::~FilteringFileEnumerator() {
-}
-
-base::FilePath FilteringFileEnumerator::Next() {
-  while (true) {
-    base::FilePath next = base_enumerator_->Next();
-    if (ShouldSkip(next))
-      continue;
-
-    if (next.empty() ||
-        base_enumerator_->IsDirectory() ||
-        filter_->Match(next))
-      return next;
-  }
-}
-
-int64 FilteringFileEnumerator::Size() {
-  return base_enumerator_->Size();
-}
-
-base::Time FilteringFileEnumerator::LastModifiedTime() {
-  return base_enumerator_->LastModifiedTime();
-}
-
-bool FilteringFileEnumerator::IsDirectory() {
-  return base_enumerator_->IsDirectory();
-}
-
-}  // namespace chrome