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// 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 "webkit/fileapi/syncable/local_file_sync_status.h"
#include "base/logging.h"
namespace fileapi {
LocalFileSyncStatus::LocalFileSyncStatus() {}
LocalFileSyncStatus::~LocalFileSyncStatus() {}
void LocalFileSyncStatus::StartWriting(const FileSystemURL& url) {
DCHECK(CalledOnValidThread());
DCHECK(!IsChildOrParentSyncing(url));
writing_[url]++;
}
void LocalFileSyncStatus::EndWriting(const FileSystemURL& url) {
DCHECK(CalledOnValidThread());
int count = --writing_[url];
if (count == 0) {
writing_.erase(url);
FOR_EACH_OBSERVER(Observer, observer_list_, OnSyncEnabled(url));
}
}
void LocalFileSyncStatus::StartSyncing(const FileSystemURL& url) {
DCHECK(CalledOnValidThread());
DCHECK(!IsChildOrParentWriting(url));
DCHECK(!IsChildOrParentSyncing(url));
syncing_.insert(url);
}
void LocalFileSyncStatus::EndSyncing(const FileSystemURL& url) {
DCHECK(CalledOnValidThread());
syncing_.erase(url);
FOR_EACH_OBSERVER(Observer, observer_list_, OnWriteEnabled(url));
}
bool LocalFileSyncStatus::IsWriting(const FileSystemURL& url) const {
DCHECK(CalledOnValidThread());
return IsChildOrParentWriting(url);
}
bool LocalFileSyncStatus::IsWritable(const FileSystemURL& url) const {
DCHECK(CalledOnValidThread());
return !IsChildOrParentSyncing(url);
}
bool LocalFileSyncStatus::IsSyncable(const FileSystemURL& url) const {
DCHECK(CalledOnValidThread());
return !IsChildOrParentSyncing(url) && !IsChildOrParentWriting(url);
}
void LocalFileSyncStatus::AddObserver(Observer* observer) {
DCHECK(CalledOnValidThread());
observer_list_.AddObserver(observer);
}
void LocalFileSyncStatus::RemoveObserver(Observer* observer) {
DCHECK(CalledOnValidThread());
observer_list_.RemoveObserver(observer);
}
bool LocalFileSyncStatus::IsChildOrParentWriting(
const FileSystemURL& url) const {
DCHECK(CalledOnValidThread());
URLCountMap::const_iterator upper = writing_.upper_bound(url);
URLCountMap::const_reverse_iterator rupper(upper);
if (upper != writing_.end() && url.IsParent(upper->first))
return true;
if (rupper != writing_.rend() &&
(rupper->first == url || rupper->first.IsParent(url)))
return true;
return false;
}
bool LocalFileSyncStatus::IsChildOrParentSyncing(
const FileSystemURL& url) const {
DCHECK(CalledOnValidThread());
FileSystemURLSet::const_iterator upper = syncing_.upper_bound(url);
FileSystemURLSet::const_reverse_iterator rupper(upper);
if (upper != syncing_.end() && url.IsParent(*upper))
return true;
if (rupper != syncing_.rend() &&
(*rupper == url || rupper->IsParent(url)))
return true;
return false;
}
} // namespace fileapi
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