| // 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/chromeos/file_manager/file_watcher.h" |
| |
| #include "base/bind.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "google_apis/drive/task_util.h" |
| |
| using content::BrowserThread; |
| |
| namespace file_manager { |
| namespace { |
| |
| // Creates a base::FilePathWatcher and starts watching at |watch_path| with |
| // |callback|. Returns NULL on failure. |
| base::FilePathWatcher* CreateAndStartFilePathWatcher( |
| const base::FilePath& watch_path, |
| const base::FilePathWatcher::Callback& callback) { |
| DCHECK_CURRENTLY_ON(BrowserThread::FILE); |
| DCHECK(!callback.is_null()); |
| |
| scoped_ptr<base::FilePathWatcher> watcher(new base::FilePathWatcher); |
| if (!watcher->Watch(watch_path, false /* recursive */, callback)) |
| return NULL; |
| |
| return watcher.release(); |
| } |
| |
| } // namespace |
| |
| FileWatcher::FileWatcher(const base::FilePath& virtual_path) |
| : local_file_watcher_(NULL), |
| virtual_path_(virtual_path), |
| weak_ptr_factory_(this) { |
| DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| } |
| |
| FileWatcher::~FileWatcher() { |
| DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| |
| BrowserThread::DeleteSoon(BrowserThread::FILE, |
| FROM_HERE, |
| local_file_watcher_); |
| } |
| |
| void FileWatcher::AddExtension(const std::string& extension_id) { |
| DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| |
| extensions_[extension_id]++; |
| } |
| |
| void FileWatcher::RemoveExtension(const std::string& extension_id) { |
| DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| |
| ExtensionCountMap::iterator it = extensions_.find(extension_id); |
| if (it == extensions_.end()) { |
| LOG(ERROR) << " Extension [" << extension_id |
| << "] tries to unsubscribe from folder [" |
| << virtual_path_.value() |
| << "] it isn't subscribed"; |
| return; |
| } |
| |
| // If entry found - decrease it's count and remove if necessary |
| --it->second; |
| if (it->second == 0) |
| extensions_.erase(it); |
| } |
| |
| std::vector<std::string> FileWatcher::GetExtensionIds() const { |
| std::vector<std::string> extension_ids; |
| for (ExtensionCountMap::const_iterator iter = extensions_.begin(); |
| iter != extensions_.end(); ++iter) { |
| extension_ids.push_back(iter->first); |
| } |
| return extension_ids; |
| } |
| |
| void FileWatcher::WatchLocalFile( |
| const base::FilePath& local_path, |
| const base::FilePathWatcher::Callback& file_watcher_callback, |
| const BoolCallback& callback) { |
| DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| DCHECK(!callback.is_null()); |
| DCHECK(!local_file_watcher_); |
| |
| BrowserThread::PostTaskAndReplyWithResult( |
| BrowserThread::FILE, |
| FROM_HERE, |
| base::Bind(&CreateAndStartFilePathWatcher, |
| local_path, |
| google_apis::CreateRelayCallback(file_watcher_callback)), |
| base::Bind(&FileWatcher::OnWatcherStarted, |
| weak_ptr_factory_.GetWeakPtr(), |
| callback)); |
| } |
| |
| void FileWatcher::OnWatcherStarted( |
| const BoolCallback& callback, |
| base::FilePathWatcher* file_watcher) { |
| DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| DCHECK(!callback.is_null()); |
| DCHECK(!local_file_watcher_); |
| |
| if (file_watcher) { |
| local_file_watcher_ = file_watcher; |
| callback.Run(true); |
| } else { |
| callback.Run(false); |
| } |
| } |
| |
| } // namespace file_manager |