// Filename: attribNodeRegistry.h
// Created by:  drose (07Jul07)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001 - 2004, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://etc.cmu.edu/panda3d/docs/license/ .
//
// To contact the maintainers of this program write to
// panda3d-general@lists.sourceforge.net .
//
////////////////////////////////////////////////////////////////////

#ifndef ATTRIBNODEREGISTRY_H
#define ATTRIBNODEREGISTRY_H

#include "pandabase.h"
#include "nodePath.h"
#include "ordered_vector.h"
#include "pmutex.h"

////////////////////////////////////////////////////////////////////
//       Class : AttribNodeRegistry
// Description : This global object records NodePaths that are
//               referenced by scene graph attribs, such as
//               ClipPlaneAttribs and LightAttribs.
//
//               Its primary purpose is to unify attribs that are
//               loaded in from bam files.  Attrib nodes are
//               identified by name and type; when a bam file that
//               contains references to some attrib nodes is loaded,
//               those nodes are first looked up here in the
//               AttribNodeRegistry.  If there is a match (by name and
//               node type), the identified node is used instead of
//               the node referenced within the bam file itself.
////////////////////////////////////////////////////////////////////
class EXPCL_PANDA AttribNodeRegistry {
protected:
  AttribNodeRegistry();

PUBLISHED:
  void add_node(const NodePath &attrib_node);
  bool remove_node(const NodePath &attrib_node);
  NodePath lookup_node(const NodePath &orig_node) const;

  int get_num_nodes() const;
  NodePath get_node(int n) const;
  TypeHandle get_node_type(int n) const;
  string get_node_name(int n) const;

  int find_node(const NodePath &attrib_node) const;
  int find_node(TypeHandle type, const string &name) const;
  void remove_node(int n);
  void clear();

  void output(ostream &out) const;
  void write(ostream &out) const;

  INLINE static AttribNodeRegistry *get_global_ptr();

private:
  static void make_global_ptr();

  class Entry {
  public:
    INLINE Entry(const NodePath &node);
    INLINE Entry(TypeHandle type, const string &name);
    INLINE bool operator < (const Entry &other) const;

    TypeHandle _type;
    string _name;
    NodePath _node;
  };

  typedef ov_set<Entry> Entries;
  Entries _entries;

  Mutex _lock;

  static AttribNodeRegistry * TVOLATILE _global_ptr;
};

#include "attribNodeRegistry.I"

#endif

