// Filename: materialCollection.cxx
// Created by:  drose (16Mar02)
//
////////////////////////////////////////////////////////////////////
//
// 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 .
//
////////////////////////////////////////////////////////////////////

#include "materialCollection.h"

#include "indent.h"

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::Constructor
//       Access: Published
//  Description:
////////////////////////////////////////////////////////////////////
MaterialCollection::
MaterialCollection() {
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::Copy Constructor
//       Access: Published
//  Description:
////////////////////////////////////////////////////////////////////
MaterialCollection::
MaterialCollection(const MaterialCollection &copy) :
  _materials(copy._materials)
{
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::Copy Assignment Operator
//       Access: Published
//  Description:
////////////////////////////////////////////////////////////////////
void MaterialCollection::
operator = (const MaterialCollection &copy) {
  _materials = copy._materials;
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::add_material
//       Access: Published
//  Description: Adds a new Material to the collection.
////////////////////////////////////////////////////////////////////
void MaterialCollection::
add_material(Material *node_material) {
  // If the pointer to our internal array is shared by any other
  // MaterialCollections, we have to copy the array now so we won't
  // inadvertently modify any of our brethren MaterialCollection
  // objects.

  if (_materials.get_ref_count() > 1) {
    Materials old_materials = _materials;
    _materials = Materials::empty_array(0);
    _materials.v() = old_materials.v();
  }

  _materials.push_back(node_material);
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::remove_material
//       Access: Published
//  Description: Removes the indicated Material from the collection.
//               Returns true if the material was removed, false if it was
//               not a member of the collection.
////////////////////////////////////////////////////////////////////
bool MaterialCollection::
remove_material(Material *node_material) {
  int material_index = -1;
  for (int i = 0; material_index == -1 && i < (int)_materials.size(); i++) {
    if (_materials[i] == node_material) {
      material_index = i;
    }
  }

  if (material_index == -1) {
    // The indicated material was not a member of the collection.
    return false;
  }

  // If the pointer to our internal array is shared by any other
  // MaterialCollections, we have to copy the array now so we won't
  // inadvertently modify any of our brethren MaterialCollection
  // objects.

  if (_materials.get_ref_count() > 1) {
    Materials old_materials = _materials;
    _materials = Materials::empty_array(0);
    _materials.v() = old_materials.v();
  }

  _materials.erase(_materials.begin() + material_index);
  return true;
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::add_materials_from
//       Access: Published
//  Description: Adds all the Materials indicated in the other
//               collection to this material.  The other materials are simply
//               appended to the end of the materials in this list;
//               duplicates are not automatically removed.
////////////////////////////////////////////////////////////////////
void MaterialCollection::
add_materials_from(const MaterialCollection &other) {
  int other_num_materials = other.get_num_materials();
  for (int i = 0; i < other_num_materials; i++) {
    add_material(other.get_material(i));
  }
}


////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::remove_materials_from
//       Access: Published
//  Description: Removes from this collection all of the Materials
//               listed in the other collection.
////////////////////////////////////////////////////////////////////
void MaterialCollection::
remove_materials_from(const MaterialCollection &other) {
  Materials new_materials;
  int num_materials = get_num_materials();
  for (int i = 0; i < num_materials; i++) {
    PT(Material) material = get_material(i);
    if (!other.has_material(material)) {
      new_materials.push_back(material);
    }
  }
  _materials = new_materials;
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::remove_duplicate_materials
//       Access: Published
//  Description: Removes any duplicate entries of the same Materials
//               on this collection.  If a Material appears multiple
//               times, the first appearance is retained; subsequent
//               appearances are removed.
////////////////////////////////////////////////////////////////////
void MaterialCollection::
remove_duplicate_materials() {
  Materials new_materials;

  int num_materials = get_num_materials();
  for (int i = 0; i < num_materials; i++) {
    PT(Material) material = get_material(i);
    bool duplicated = false;

    for (int j = 0; j < i && !duplicated; j++) {
      duplicated = (material == get_material(j));
    }

    if (!duplicated) {
      new_materials.push_back(material);
    }
  }

  _materials = new_materials;
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::has_material
//       Access: Published
//  Description: Returns true if the indicated Material appears in
//               this collection, false otherwise.
////////////////////////////////////////////////////////////////////
bool MaterialCollection::
has_material(Material *material) const {
  for (int i = 0; i < get_num_materials(); i++) {
    if (material == get_material(i)) {
      return true;
    }
  }
  return false;
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::clear
//       Access: Published
//  Description: Removes all Materials from the collection.
////////////////////////////////////////////////////////////////////
void MaterialCollection::
clear() {
  _materials.clear();
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::find_material
//       Access: Published
//  Description: Returns the material in the collection with the
//               indicated name, if any, or NULL if no material has
//               that name.
////////////////////////////////////////////////////////////////////
Material *MaterialCollection::
find_material(const string &name) const {
  int num_materials = get_num_materials();
  for (int i = 0; i < num_materials; i++) {
    Material *material = get_material(i);
    if (material->get_name() == name) {
      return material;
    }
  }
  return NULL;
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::get_num_materials
//       Access: Published
//  Description: Returns the number of Materials in the collection.
////////////////////////////////////////////////////////////////////
int MaterialCollection::
get_num_materials() const {
  return _materials.size();
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::get_material
//       Access: Published
//  Description: Returns the nth Material in the collection.
////////////////////////////////////////////////////////////////////
Material *MaterialCollection::
get_material(int index) const {
  nassertr(index >= 0 && index < (int)_materials.size(), NULL);

  return _materials[index];
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::operator []
//       Access: Published
//  Description: Returns the nth Material in the collection.  This is
//               the same as get_material(), but it may be a more
//               convenient way to access it.
////////////////////////////////////////////////////////////////////
Material *MaterialCollection::
operator [] (int index) const {
  nassertr(index >= 0 && index < (int)_materials.size(), NULL);

  return _materials[index];
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::output
//       Access: Published
//  Description: Writes a brief one-line description of the
//               MaterialCollection to the indicated output stream.
////////////////////////////////////////////////////////////////////
void MaterialCollection::
output(ostream &out) const {
  if (get_num_materials() == 1) {
    out << "1 Material";
  } else {
    out << get_num_materials() << " Materials";
  }
}

////////////////////////////////////////////////////////////////////
//     Function: MaterialCollection::write
//       Access: Published
//  Description: Writes a complete multi-line description of the
//               MaterialCollection to the indicated output stream.
////////////////////////////////////////////////////////////////////
void MaterialCollection::
write(ostream &out, int indent_level) const {
  for (int i = 0; i < get_num_materials(); i++) {
    indent(out, indent_level) << *get_material(i) << "\n";
  }
}
