void UDirectoryWatcher::Watch(const FString& InDirectory)
{
Unwatch();
FDirectoryWatcherModule& DirectoryWatcherModule = FModuleManager::Get().LoadModuleChecked<FDirectoryWatcherModule>(TEXT("DirectoryWatcher"));
IDirectoryWatcher* DirectoryWatcher = DirectoryWatcherModule.Get();
Directory = FPaths::IsRelative(InDirectory) ? FPaths::ConvertRelativePathToFull(InDirectory) : InDirectory;
Changed = IDirectoryWatcher::FDirectoryChanged::CreateLambda([&](const TArray<FFileChangeData>& FileChanges){
for (auto Change : FileChanges)
{
FPaths::NormalizeFilename(Change.Filename);
switch (Change.Action)
{
case FFileChangeData::FCA_Added:
Added.Add(Change.Filename);
break;
case FFileChangeData::FCA_Modified:
Modified.Add(Change.Filename);
break;
case FFileChangeData::FCA_Removed:
Removed.Add(Change.Filename);
break;
}
}
OnChanged.Broadcast();
Added.Empty();
Modified.Empty();
Removed.Empty();
});
if (IFileManager::Get().DirectoryExists(*Directory))
{
DirectoryWatcher->RegisterDirectoryChangedCallback_Handle(Directory, Changed, DelegateHandle, true);
}
}
bool InotifyDir::EventPoll(Event& event) {
for (;;) {
if (!m_pendingEv.empty()) {
event = m_pendingEv.front();
m_pendingEv.pop_front();
return true;
}
if (m_buffIdx >= m_buffLen) {
m_buffIdx = 0;
m_buffLen = read(m_wfd, m_buff, sizeof(m_buff));
if (m_buffLen <= 0) {
return false;
}
}
inotify_event* ev = (inotify_event*)&m_buff[m_buffIdx];
m_buffIdx += ev->len + sizeof(inotify_event);
if (ev->mask & (IN_IGNORED | IN_UNMOUNT)) {
Unwatch(ev->wd);
continue;
}
if (ev->mask & (IN_CREATE | IN_MOVED_TO)) {
if (ev->mask & IN_ISDIR) {
std::string s = m_watchFd[ev->wd] + ev->name;
if (ev->mask & IN_MOVED_TO) {
AddPathEvent(s.c_str(), ADD);
}
continue;
}
}
if (ev->mask & IN_MOVED_FROM && ev->mask & IN_ISDIR) {
//event can't catch
continue;
}
if (ev->mask & IN_MOVE_SELF) {
continue;
}
if (ev->mask & IN_DELETE) {
if (ev->mask & IN_ISDIR) {
continue;
}
}
event.clear();
if (ev->mask & (IN_MOVED_TO | IN_CREATE)) {
event.type = ADD;
} else if (ev->mask & (IN_MOVED_FROM | IN_DELETE)) {
event.type = DELETE;
} else if (ev->mask & IN_MODIFY) {
event.type = MODIFY;
} else {
event.type = UNKNOWN;
}
event.name = m_watchFd[ev->wd] + ev->name;
return true;
}
}
void UDirectoryWatcher::BeginDestroy()
{
Super::BeginDestroy();
Unwatch();
}
