UT_UndoWorkerFinderTable.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 * 
 * NAME:        UT_UndoWorkerFinderTable.h
 *
 * COMMENTS:
 *      This class maintains a table of undo worker finders.  See
 *      UT_UndoWorkerFinder.h for comments on how this class works.
 */

#ifndef __UT_UndoWorkerFinderTable_h__
#define __UT_UndoWorkerFinderTable_h__

#include "UT_API.h"
#include "UT_Map.h"
#include "UT_NonCopyable.h"

class UT_UndoWorkerFinderBase;

class UT_API UT_UndoWorkerFinderTable
{
public:
    static UT_UndoWorkerFinderTable     &instance();

    void         addWorkerFinder(UT_UndoWorkerFinderBase &worker_finder);
    void         removeWorkerFinder(UT_UndoWorkerFinderBase &worker_finder);
    void        *findOpaqueWorker(int undo_worker_id);

protected:
    UT_UndoWorkerFinderTable();
    ~UT_UndoWorkerFinderTable();
    UT_NON_COPYABLE(UT_UndoWorkerFinderTable)

    static UT_UndoWorkerFinderTable     *ourInstance;

    UT_Map<int, UT_UndoWorkerFinderBase *> myTable;
    int                                  myNextUniqueId;
};

#endif