| // 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/extensions/file_manager/file_watcher.h" |
| |
| #include "base/bind.h" |
| #include "base/message_loop/message_loop_proxy.h" |
| #include "chrome/browser/google_apis/task_util.h" |
| #include "content/public/browser/browser_thread.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(BrowserThread::CurrentlyOn(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, |
| const std::string& extension_id, |
| bool is_remote_file_system) |
| : local_file_watcher_(NULL), |
| virtual_path_(virtual_path), |
| ref_count_(0), |
| is_remote_file_system_(is_remote_file_system), |
| weak_ptr_factory_(this) { |
| DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| |
| AddExtension(extension_id); |
| } |
| |
| FileWatcher::~FileWatcher() { |
| DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| |
| BrowserThread::DeleteSoon(BrowserThread::FILE, |
| FROM_HERE, |
| local_file_watcher_); |
| } |
| |
| void FileWatcher::AddExtension(const std::string& extension_id) { |
| DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| |
| extensions_[extension_id]++; |
| ref_count_++; |
| } |
| |
| void FileWatcher::RemoveExtension(const std::string& extension_id) { |
| DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| |
| ExtensionUsageRegistry::iterator it = extensions_.find(extension_id); |
| if (it == extensions_.end()) { |
| LOG(ERROR) << " Extension [" << extension_id |
| << "] tries to unsubscribe from folder [" << local_path_.value() |
| << "] it isn't subscribed"; |
| return; |
| } |
| |
| // If entry found - decrease it's count and remove if necessary |
| if (it->second-- == 0) |
| extensions_.erase(it); |
| |
| ref_count_--; |
| } |
| |
| void FileWatcher::Watch( |
| const base::FilePath& local_path, |
| const base::FilePathWatcher::Callback& file_watcher_callback, |
| const BoolCallback& callback) { |
| DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| DCHECK(!callback.is_null()); |
| DCHECK(!local_file_watcher_); |
| |
| local_path_ = local_path; // For error message in RemoveExtension(). |
| |
| if (is_remote_file_system_) { |
| base::MessageLoopProxy::current()->PostTask(FROM_HERE, |
| base::Bind(callback, true)); |
| return; |
| } |
| |
| 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(BrowserThread::CurrentlyOn(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 |