bool wxFileSystemWatcherBase::AddTree(const wxFileName& path, int events,
const wxString& filespec)
{
if (!path.DirExists())
return false;
// OPT could be optimised if we stored information about relationships
// between paths
class AddTraverser : public wxDirTraverser
{
public:
AddTraverser(wxFileSystemWatcherBase* watcher, int events,
const wxString& filespec) :
m_watcher(watcher), m_events(events), m_filespec(filespec)
{
}
virtual wxDirTraverseResult OnFile(const wxString& WXUNUSED(filename))
{
// There is no need to watch individual files as we watch the
// parent directory which will notify us about any changes in them.
return wxDIR_CONTINUE;
}
virtual wxDirTraverseResult OnDir(const wxString& dirname)
{
if ( m_watcher->AddAny(wxFileName::DirName(dirname),
m_events, wxFSWPath_Tree, m_filespec) )
{
wxLogTrace(wxTRACE_FSWATCHER,
"--- AddTree adding directory '%s' ---", dirname);
}
return wxDIR_CONTINUE;
}
private:
wxFileSystemWatcherBase* m_watcher;
int m_events;
wxString m_filespec;
};
wxDir dir(path.GetFullPath());
// Prevent asserts or infinite loops in trees containing symlinks
int flags = wxDIR_DIRS;
if ( !path.ShouldFollowLink() )
{
flags |= wxDIR_NO_FOLLOW;
}
AddTraverser traverser(this, events, filespec);
dir.Traverse(traverser, filespec, flags);
// Add the path itself explicitly as Traverse() doesn't return it.
AddAny(path.GetPathWithSep(), events, wxFSWPath_Tree, filespec);
return true;
}
bool wxFileSystemWatcherBase::RemoveTree(const wxFileName& path)
{
if (!path.DirExists())
return false;
// OPT could be optimised if we stored information about relationships
// between paths
class RemoveTraverser : public wxDirTraverser
{
public:
RemoveTraverser(wxFileSystemWatcherBase* watcher,
const wxString& filespec) :
m_watcher(watcher), m_filespec(filespec)
{
}
virtual wxDirTraverseResult OnFile(const wxString& WXUNUSED(filename))
{
// We never watch the individual files when watching the tree, so
// nothing to do here.
return wxDIR_CONTINUE;
}
virtual wxDirTraverseResult OnDir(const wxString& dirname)
{
m_watcher->Remove(wxFileName::DirName(dirname));
return wxDIR_CONTINUE;
}
private:
wxFileSystemWatcherBase* m_watcher;
wxString m_filespec;
};
// If AddTree() used a filespec, we must use the same one
wxString canonical = GetCanonicalPath(path);
wxFSWatchInfoMap::iterator it = m_watches.find(canonical);
wxCHECK_MSG( it != m_watches.end(), false,
wxString::Format("Path '%s' is not watched", canonical) );
wxFSWatchInfo watch = it->second;
const wxString filespec = watch.GetFilespec();
#if defined(__WINDOWS__)
// When there's no filespec, the wxMSW AddTree() would have set a watch
// on only the passed 'path'. We must therefore remove only this
if (filespec.empty())
{
return Remove(path);
}
// Otherwise fall through to the generic implementation
#endif // __WINDOWS__
wxDir dir(path.GetFullPath());
// AddTree() might have used the wxDIR_NO_FOLLOW to prevent asserts or
// infinite loops in trees containing symlinks. We need to do the same
// or we'll try to remove unwatched items. Let's hope the caller used
// the same ShouldFollowLink() setting as in AddTree()...
int flags = wxDIR_DIRS;
if ( !path.ShouldFollowLink() )
{
flags |= wxDIR_NO_FOLLOW;
}
RemoveTraverser traverser(this, filespec);
dir.Traverse(traverser, filespec, flags);
// As in AddTree() above, handle the path itself explicitly.
Remove(path);
return true;
}