Esempio n. 1
0
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;
}
Esempio n. 2
0
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;
}